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Merge branch 'master' into adaptive-eta

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This commit is contained in:
Shlomi Noach 2016-10-20 18:41:57 +02:00
commit cf08babc55
138 changed files with 164247 additions and 273 deletions
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12
.github/ISSUE_TEMPLATE.md vendored
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@ -1,9 +1,13 @@
> This is the place to report a bug, ask a question, suggest an enhancement.
> This is the place to report a bug, ask a question, or suggest an enhancement.
> This is the place to make a discussion before creating a PR.
> This is also the place to make a discussion before creating a PR.
> Please label your Issue
> If this is a bug report, please provide a test case (e.g., your table definition and gh-ost command) and the error output.
> Please understand if this Issue is not addressed immediately or in a timeframe you were expecting.
> Please use markdown to format code or SQL: https://guides.github.com/features/mastering-markdown/
> Please label the issue on the right (bug, enhancement, question, etc.).
> And please understand if this issue is not addressed immediately or in a timeframe you were expecting.
> Thank you!

2
build.sh
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@ -2,7 +2,7 @@
#
#
RELEASE_VERSION="1.0.18"
RELEASE_VERSION="1.0.23"
function build {
osname=$1

18
doc/command-line-flags.md
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@ -43,10 +43,26 @@ password=123456
See `exact-rowcount`
### critical-load-interval-millis
`--critical-load` defines a threshold that, when met, `gh-ost` panics and bails out. The default behavior is to bail out immediately when meeting this threshold.
This may sometimes lead to migrations bailing out on a very short spike, that, while in itself is impacting production and is worth investigating, isn't reason enough to kill a 10 hour migration.
When `--critical-load-interval-millis` is specified (e.g. `--critical-load-interval-millis=2500`), `gh-ost` gives a second chance: when it meets `critical-load` threshold, it doesn't bail out. Instead, it starts a timer (in this example: `2.5` seconds) and re-checks `critical-load` when the timer expires. If `critical-load` is met again, `gh-ost` panics and bails out. If not, execution continues.
This is somewhat similar to a Nagios `n`-times test, where `n` in our case is always `2`.
### cut-over
Optional. Default is `safe`. See more discussion in [cut-over](cut-over.md)
### discard-foreign-keys
**Danger**: this flag will _silently_ discard any foreign keys existing on your table.
At this time (10-2016) `gh-ost` does not support foreign keys on migrated tables (it bails out when it notices a FK on the migrated table). However, it is able to support _dropping_ of foreign keys via this flag. If you're trying to get rid of foreign keys in your environment, this is a useful flag.
### exact-rowcount
A `gh-ost` execution need to copy whatever rows you have in your existing table onto the ghost table. This can, and often be, a large number. Exactly what that number is?
@ -98,4 +114,4 @@ See `approve-renamed-columns`
### test-on-replica
Issue the migration on a replica; do not modify data on master. Useful for validating, testing and benchmarking. See [test-on-replica](test-on-replica.md)
Issue the migration on a replica; do not modify data on master. Useful for validating, testing and benchmarking. See [testing-on-replica](testing-on-replica.md)

4
doc/migrating-with-sbr.md
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@ -2,7 +2,7 @@
Even though `gh-ost` relies on Row Based Replication (RBR), it does not mean you can't keep your Statement Based Replication (SBR).
`gh-ost` is happy to, and actually prefers and suggests so, connect to a replica. On this replica, it is happy to:
`gh-ost` is happy to, and actually prefers and suggests to, connect to a replica. On this replica, it is happy to:
- issue the heavyweight `INFORMATION_SCHEMA` queries that make a table structure analysis
- issue a `select count(*) from mydb.mytable`, should `--exact-rowcount` be provided
- connect itself as a fake replica to get the binary log stream
@ -11,7 +11,7 @@ All of the above can be executed on the master, but we're more comfortable that
Please note the third item: `gh-ost` connects as a fake replica and pulls the binary logs. This is how `gh-ost` finds the table's changelog: it looks up entries in the binary log.
The magic is that your master can still produce SRB, but if you have a replica with `log-slave-updates`, you can also configure it to have `binlog_format='ROW'`. Such a replica accepts SBR statements from its master, and produces RBR statements onto its binary logs.
The magic is that your master can still produce SBR, but if you have a replica with `log-slave-updates`, you can also configure it to have `binlog_format='ROW'`. Such a replica accepts SBR statements from its master, and produces RBR statements onto its binary logs.
`gh-ost` is happy to modify the `binlog_format` on the replica for you:
- If you supply `--switch-to-rbr`, `gh-ost` will convert the binlog format for you, and restart replication to make sure this takes effect.

13
doc/requirements-and-limitations.md
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@ -2,7 +2,9 @@
### Requirements
- You will need to have one server serving Row Based Replication (RBR) format binary logs. Right now `FULL` row image is supported. `MINIMAL` to be supported in the near future. `gh-ost` prefers to work with replicas. You may [still have your master configured with Statement Based Replication](migrating-with-sbr) (SBR).
- You will need to have one server serving Row Based Replication (RBR) format binary logs. Right now `FULL` row image is supported. `MINIMAL` to be supported in the near future. `gh-ost` prefers to work with replicas. You may [still have your master configured with Statement Based Replication](migrating-with-sbr.md) (SBR).
- If you are using a replica, the table must have an identical schema between the master and replica.
- `gh-ost` requires an account with these privileges:
@ -15,20 +17,29 @@ The `SUPER` privilege is required for `STOP SLAVE`, `START SLAVE` operations. Th
- Switching your `binlog_format` to `ROW`, in the case where it is _not_ `ROW` and you explicitly specified `--switch-to-rbr`
- If your replication is already in RBR (`binlog_format=ROW`) you can specify `--assume-rbr` to avoid the `STOP SLAVE/START SLAVE` operations, hence no need for `SUPER`.
- Running `--test-on-replica`: before the cut-over phase, `gh-ost` stops replication so that you can compare the two tables and satisfy that the migration is sound.
### Limitations
- Foreign keys not supported. They may be supported in the future, to some extent.
- Triggers are not supported. They may be supported in the future.
- MySQL 5.7 generated columns are not supported. They may be supported in the future.
- The two _before_ & _after_ tables must share some `UNIQUE KEY`. Such key would be used by `gh-ost` to iterate the table.
- As an example, if your table has a single `UNIQUE KEY` and no `PRIMARY KEY`, and you wish to replace it with a `PRIMARY KEY`, you will need two migrations: one to add the `PRIMARY KEY` (this migration will use the existing `UNIQUE KEY`), another to drop the now redundant `UNIQUE KEY` (this migration will use the `PRIMARY KEY`).
- The chosen migration key must not include columns with `NULL` values.
- `gh-ost` will do its best to pick a migration key with non-nullable columns. It will by default refuse a migration where the only possible `UNIQUE KEY` includes nullable-columns. You may override this refusal via `--allow-nullable-unique-key` but **you must** be sure there are no actual `NULL` values in those columns. Such `NULL` values would cause a data integrity problem and potentially a corrupted migration.
- It is not allowed to migrate a table where another table exists with same name and different upper/lower case.
- For example, you may not migrate `MyTable` if another table called `MYtable` exists in the same schema.
- Amazon RDS and Google Cloud SQL are currently not supported
- We began working towards removing this limitation. See tracking issue: https://github.com/github/gh-ost/issues/163
- Multisource is not supported when migrating via replica. It _should_ work (but never tested) when connecting directly to master (`--allow-on-master`)
- Master-master setup is only supported in active-passive setup. Active-active (where table is being written to on both masters concurrently) is unsupported. It may be supported in the future.

4
doc/testing-on-replica.md
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@ -49,12 +49,12 @@ It's your job to:
Simple:
```shell
$ gh-osc --host=myhost.com --conf=/etc/gh-ost.cnf --database=test --table=sample_table --alter="engine=innodb" --chunk-size=2000 --max-load=Threads_connected=20 --initially-drop-ghost-table --initially-drop-old-table --test-on-replica --verbose --execute
$ gh-ost --host=myhost.com --conf=/etc/gh-ost.cnf --database=test --table=sample_table --alter="engine=innodb" --chunk-size=2000 --max-load=Threads_connected=20 --initially-drop-ghost-table --initially-drop-old-table --test-on-replica --verbose --execute
```
Elaborate:
```shell
$ gh-osc --host=myhost.com --conf=/etc/gh-ost.cnf --database=test --table=sample_table --alter="engine=innodb" --chunk-size=2000 --max-load=Threads_connected=20 --switch-to-rbr --initially-drop-ghost-table --initially-drop-old-table --test-on-replica --postpone-cut-over-flag-file=/tmp/ghost-postpone.flag --exact-rowcount --concurrent-rowcount --allow-nullable-unique-key --verbose --execute
$ gh-ost --host=myhost.com --conf=/etc/gh-ost.cnf --database=test --table=sample_table --alter="engine=innodb" --chunk-size=2000 --max-load=Threads_connected=20 --switch-to-rbr --initially-drop-ghost-table --initially-drop-old-table --test-on-replica --postpone-cut-over-flag-file=/tmp/ghost-postpone.flag --exact-rowcount --concurrent-rowcount --allow-nullable-unique-key --verbose --execute
```
- Count exact number of rows (makes ETA estimation very good). This goes at the expense of paying the time for issuing a `SELECT COUNT(*)` on your table. We use this lovingly.
- Automatically switch to `RBR` if replica is configured as `SBR`. See also: [migrating with SBR](migrating-with-sbr.md)

21
doc/the-fine-print.md
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@ -4,24 +4,27 @@ Here are technical considerations you may be interested in. We write here things
# Connecting to replica
`gh-ost` prefers connecting to replica. If your master uses Statement Based Replication, this is a _requirement_.
`gh-ost` prefers connecting to a replica. If your master uses Statement Based Replication, this is a _requirement_.
What does "connect to replica" mean?
- `gh-ost` connects to the replica as a normal client
- It additionally connects as a replica to the replica (pretends to be a MySQL replica itself)
- It auto-detects master
- It auto-detects the master
`gh-ost` reads the RBR binary logs from the replica, and applies events onto the master as tables are being migrated.
`gh-ost` reads the RBR binary logs from the replica, and applies events onto the master as part of the table migration.
THE FINE PRINT:
- You trust the replica's binary logs to represent events applied on master.
If you don't trust the replica, if you suspect there's data drift between replica & master, take notice. If your master is RBR, do instead connect `gh-ost` to master, via `--allow-on-master` (see [cheatsheet](cheatsheet.md)).
Our take: we trust replica data; if master dies in production, we promote a replica. Our read serving is based on replica(s).
- If you don't trust the replica, or if you suspect there's data drift between replica & master, take notice.
- If the table on the replica has a different schema than the master, `gh-ost` likely won't work correctly.
- Our take: we trust replica data; if master dies in production, we promote a replica. Our read serving is based on replica(s).
- If your master is RBR, do instead connect `gh-ost` to master, via `--allow-on-master` (see [cheatsheet](cheatsheet.md)).
- Replication needs to run.
This is an obvious, but worth stating. You cannot perform a migration with "connect to replica" if your replica lags. `gh-ost` will actually do all it can so that replication does not lag, and avoid critical operations at such time when replication does lag.
- This is an obvious, but worth stating. You cannot perform a migration with "connect to replica" if your replica lags. `gh-ost` will actually do all it can so that replication does not lag, and avoid critical operations if replication is lagging.
# Network usage
@ -30,12 +33,12 @@ THE FINE PRINT:
THE FINE PRINT:
- `gh-ost` delivers more network traffic than other online-schema-change tools, that let MySQL handle all data transfer internally. This is part of the [triggerless design](triggerless-design.md).
Our take: we deal with cross-DC migration traffic and this is working well for us.
- Our take: we deal with cross-DC migration traffic and this is working well for us.
# Impersonating as a replica
`gh-ost` impersonates as a replica: connects to a MySQL server, says "oh hey, I'm a replica, please send me binary logs kthx".
`gh-ost` impersonates as a replica: it connects to a MySQL server, says "oh hey, I'm a replica, please send me binary logs kthx".
THE FINE PRINT:
- `SHOW SLAVE HOSTS` or `SHOW PROCESSLIST` will list down this strange "replica" that you can't really connect to.
- `SHOW SLAVE HOSTS` or `SHOW PROCESSLIST` will list this strange "replica" that you can't really connect to.

6
doc/throttle.md
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@ -46,7 +46,7 @@ Note that you may dynamically change both `replication-lag-query` and the `throt
`--max-load='Threads_running=100,Threads_connected=500'`
Metrics must be valid, numeric [statis variables](http://dev.mysql.com/doc/refman/5.6/en/server-status-variables.html)
Metrics must be valid, numeric [status variables](http://dev.mysql.com/doc/refman/5.6/en/server-status-variables.html)
#### Throttle query
@ -80,7 +80,7 @@ In addition to the above, you are able to take control and throttle the operatio
Any single factor in the above that suggests the migration should throttle - causes throttling. That is, once some component decides to throttle, you cannot override it; you cannot force continued execution of the migration.
`gh-ost` collects different throttle-related metrics at different times, independently. It asynchronously reads the collected metrics and checks if they satisfy conditions/threasholds.
`gh-ost` collects different throttle-related metrics at different times, independently. It asynchronously reads the collected metrics and checks if they satisfy conditions/thresholds.
The first check to suggest throttling stops the check; the status message will note the reason for throttling as the first satisfied check.
@ -97,7 +97,7 @@ Copy: 0/2915 0.0%; Applied: 0; Backlog: 0/100; Elapsed: 42s(copy), 42s(total); s
Throttling time is limited by the availability of the binary logs. When throttling begins, `gh-ost` suspends reading the binary logs, and expects to resume reading from same binary log where it paused.
Your availability of binary logs is typically determined by the [expire_logs_days](dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_expire_logs_days) variable. If you have `expire_logs_days = 10` (or check `select @@global.expire_logs_days`), then you should be able to throttle for up to `10` days.
Your availability of binary logs is typically determined by the [expire_logs_days](https://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html#sysvar_expire_logs_days) variable. If you have `expire_logs_days = 10` (or check `select @@global.expire_logs_days`), then you should be able to throttle for up to `10` days.
Having said that, throttling for so long is far fetching, in that the `gh-ost` process itself must be kept alive during that time; and the amount of binary logs to process once it resumes will potentially take days to replay.

2
doc/understanding-output.md
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@ -1,4 +1,4 @@
# Understading gh-ost output
# Understanding gh-ost output
`gh-ost` attempts to be verbose to the point where you really know what it's doing, without completely spamming you.
You can control output levels:

2
doc/what-if.md
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@ -33,7 +33,7 @@ You're always able to actively begin [throttling](throttle.md). Just touch the `
### What if my replicas don't use binary logs?
If the master is running Row Based Replication (RBR) - point `gh-ost` to the master, and specify `--allow-on-master`. See [cheatsheets](cheatsheets.md)
If the master is running Row Based Replication (RBR) - point `gh-ost` to the master, and specify `--allow-on-master`. See [cheatsheets](cheatsheet.md)
If the master is running Statement Based Replication (SBR) - you have no alternative but to reconfigure a replica with:

29
go/base/context.go
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@ -70,6 +70,7 @@ type MigrationContext struct {
ApproveRenamedColumns bool
SkipRenamedColumns bool
IsTungsten bool
DiscardForeignKeys bool
config ContextConfig
configMutex *sync.Mutex
@ -90,8 +91,10 @@ type MigrationContext struct {
ThrottleCommandedByUser int64
maxLoad LoadMap
criticalLoad LoadMap
CriticalLoadIntervalMilliseconds int64
PostponeCutOverFlagFile string
CutOverLockTimeoutSeconds int64
ForceNamedCutOverCommand bool
PanicFlagFile string
HooksPath string
HooksHintMessage string
@ -111,6 +114,7 @@ type MigrationContext struct {
Hostname string
AssumeMasterHostname string
ApplierTimeZone string
TableEngine string
RowsEstimate int64
RowsDeltaEstimate int64
@ -140,6 +144,8 @@ type MigrationContext struct {
CountingRowsFlag int64
AllEventsUpToLockProcessedInjectedFlag int64
CleanupImminentFlag int64
UserCommandedUnpostponeFlag int64
PanicAbort chan error
OriginalTableColumns *sql.ColumnList
OriginalTableUniqueKeys [](*sql.UniqueKey)
@ -192,6 +198,7 @@ func newMigrationContext() *MigrationContext {
configMutex: &sync.Mutex{},
pointOfInterestTimeMutex: &sync.Mutex{},
ColumnRenameMap: make(map[string]string),
PanicAbort: make(chan error),
}
}
@ -232,6 +239,28 @@ func (this *MigrationContext) RequiresBinlogFormatChange() bool {
return this.OriginalBinlogFormat != "ROW"
}
// GetApplierHostname is a safe access method to the applier hostname
func (this *MigrationContext) GetApplierHostname() string {
if this.ApplierConnectionConfig == nil {
return ""
}
if this.ApplierConnectionConfig.ImpliedKey == nil {
return ""
}
return this.ApplierConnectionConfig.ImpliedKey.Hostname
}
// GetInspectorHostname is a safe access method to the inspector hostname
func (this *MigrationContext) GetInspectorHostname() string {
if this.InspectorConnectionConfig == nil {
return ""
}
if this.InspectorConnectionConfig.ImpliedKey == nil {
return ""
}
return this.InspectorConnectionConfig.ImpliedKey.Hostname
}
// InspectorIsAlsoApplier is `true` when the both inspector and applier are the
// same database instance. This would be true when running directly on master or when
// testing on replica.

5
go/cmd/gh-ost/main.go
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@ -61,6 +61,7 @@ func main() {
flag.BoolVar(&migrationContext.ApproveRenamedColumns, "approve-renamed-columns", false, "in case your `ALTER` statement renames columns, gh-ost will note that and offer its interpretation of the rename. By default gh-ost does not proceed to execute. This flag approves that gh-ost's interpretation si correct")
flag.BoolVar(&migrationContext.SkipRenamedColumns, "skip-renamed-columns", false, "in case your `ALTER` statement renames columns, gh-ost will note that and offer its interpretation of the rename. By default gh-ost does not proceed to execute. This flag tells gh-ost to skip the renamed columns, i.e. to treat what gh-ost thinks are renamed columns as unrelated columns. NOTE: you may lose column data")
flag.BoolVar(&migrationContext.IsTungsten, "tungsten", false, "explicitly let gh-ost know that you are running on a tungsten-replication based topology (you are likely to also provide --assume-master-host)")
flag.BoolVar(&migrationContext.DiscardForeignKeys, "discard-foreign-keys", false, "DANGER! This flag will migrate a table that has foreign keys and will NOT create foreign keys on the ghost table, thus your altered table will have NO foreign keys. This is useful for intentional dropping of foreign keys")
executeFlag := flag.Bool("execute", false, "actually execute the alter & migrate the table. Default is noop: do some tests and exit")
flag.BoolVar(&migrationContext.TestOnReplica, "test-on-replica", false, "Have the migration run on a replica, not on the master. At the end of migration replication is stopped, and tables are swapped and immediately swap-revert. Replication remains stopped and you can compare the two tables for building trust")
@ -71,6 +72,7 @@ func main() {
flag.BoolVar(&migrationContext.InitiallyDropOldTable, "initially-drop-old-table", false, "Drop a possibly existing OLD table (remains from a previous run?) before beginning operation. Default is to panic and abort if such table exists")
flag.BoolVar(&migrationContext.InitiallyDropGhostTable, "initially-drop-ghost-table", false, "Drop a possibly existing Ghost table (remains from a previous run?) before beginning operation. Default is to panic and abort if such table exists")
cutOver := flag.String("cut-over", "atomic", "choose cut-over type (default|atomic, two-step)")
flag.BoolVar(&migrationContext.ForceNamedCutOverCommand, "force-named-cut-over", false, "When true, the 'unpostpone|cut-over' interactive command must name the migrated table")
flag.BoolVar(&migrationContext.SwitchToRowBinlogFormat, "switch-to-rbr", false, "let this tool automatically switch binary log format to 'ROW' on the replica, if needed. The format will NOT be switched back. I'm too scared to do that, and wish to protect you if you happen to execute another migration while this one is running")
flag.BoolVar(&migrationContext.AssumeRBR, "assume-rbr", false, "set to 'true' when you know for certain your server uses 'ROW' binlog_format. gh-ost is unable to tell, event after reading binlog_format, whether the replication process does indeed use 'ROW', and restarts replication to be certain RBR setting is applied. Such operation requires SUPER privileges which you might not have. Setting this flag avoids restarting replication and you can proceed to use gh-ost without SUPER privileges")
@ -97,7 +99,8 @@ func main() {
flag.StringVar(&migrationContext.HooksHintMessage, "hooks-hint", "", "arbitrary message to be injected to hooks via GH_OST_HOOKS_HINT, for your convenience")
maxLoad := flag.String("max-load", "", "Comma delimited status-name=threshold. e.g: 'Threads_running=100,Threads_connected=500'. When status exceeds threshold, app throttles writes")
criticalLoad := flag.String("critical-load", "", "Comma delimited status-name=threshold, same format as `--max-load`. When status exceeds threshold, app panics and quits")
criticalLoad := flag.String("critical-load", "", "Comma delimited status-name=threshold, same format as --max-load. When status exceeds threshold, app panics and quits")
flag.Int64Var(&migrationContext.CriticalLoadIntervalMilliseconds, "critical-load-interval-millis", 0, "When 0, migration immediately bails out upon meeting critical-load. When non-zero, a second check is done after given interval, and migration only bails out if 2nd check still meets critical load")
quiet := flag.Bool("quiet", false, "quiet")
verbose := flag.Bool("verbose", false, "verbose")
debug := flag.Bool("debug", false, "debug mode (very verbose)")

43
go/logic/applier.go
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@ -59,6 +59,9 @@ func (this *Applier) InitDBConnections() (err error) {
if err := this.validateConnection(this.singletonDB); err != nil {
return err
}
if err := this.validateAndReadTimeZone(); err != nil {
return err
}
if impliedKey, err := mysql.GetInstanceKey(this.db); err != nil {
return err
} else {
@ -81,6 +84,17 @@ func (this *Applier) validateConnection(db *gosql.DB) error {
return nil
}
// validateAndReadTimeZone potentially reads server time-zone
func (this *Applier) validateAndReadTimeZone() error {
query := `select @@global.time_zone`
if err := this.db.QueryRow(query).Scan(&this.migrationContext.ApplierTimeZone); err != nil {
return err
}
log.Infof("will use time_zone='%s' on applier", this.migrationContext.ApplierTimeZone)
return nil
}
// showTableStatus returns the output of `show table status like '...'` command
func (this *Applier) showTableStatus(tableName string) (rowMap sqlutils.RowMap) {
rowMap = nil
@ -414,7 +428,29 @@ func (this *Applier) ApplyIterationInsertQuery() (chunkSize int64, rowsAffected
if err != nil {
return chunkSize, rowsAffected, duration, err
}
sqlResult, err := sqlutils.Exec(this.db, query, explodedArgs...)
sqlResult, err := func() (gosql.Result, error) {
tx, err := this.db.Begin()
if err != nil {
return nil, err
}
sessionQuery := fmt.Sprintf(`SET
SESSION time_zone = '%s',
sql_mode = CONCAT(@@session.sql_mode, ',STRICT_ALL_TABLES')
`, this.migrationContext.ApplierTimeZone)
if _, err := tx.Exec(sessionQuery); err != nil {
return nil, err
}
result, err := tx.Exec(query, explodedArgs...)
if err != nil {
return nil, err
}
if err := tx.Commit(); err != nil {
return nil, err
}
return result, nil
}()
if err != nil {
return chunkSize, rowsAffected, duration, err
}
@ -871,10 +907,11 @@ func (this *Applier) ApplyDMLEventQuery(dmlEvent *binlog.BinlogDMLEvent) error {
if err != nil {
return err
}
if _, err := tx.Exec(`SET
sessionQuery := `SET
SESSION time_zone = '+00:00',
sql_mode = CONCAT(@@session.sql_mode, ',STRICT_ALL_TABLES')
`); err != nil {
`
if _, err := tx.Exec(sessionQuery); err != nil {
return err
}
if _, err := tx.Exec(query, args...); err != nil {

4
go/logic/hooks.go
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@ -59,8 +59,8 @@ func (this *HooksExecutor) applyEnvironmentVairables(extraVariables ...string) [
env = append(env, fmt.Sprintf("GH_OST_ESTIMATED_ROWS=%d", estimatedRows))
totalRowsCopied := this.migrationContext.GetTotalRowsCopied()
env = append(env, fmt.Sprintf("GH_OST_COPIED_ROWS=%d", totalRowsCopied))
env = append(env, fmt.Sprintf("GH_OST_MIGRATED_HOST=%s", this.migrationContext.ApplierConnectionConfig.ImpliedKey.Hostname))
env = append(env, fmt.Sprintf("GH_OST_INSPECTED_HOST=%s", this.migrationContext.InspectorConnectionConfig.ImpliedKey.Hostname))
env = append(env, fmt.Sprintf("GH_OST_MIGRATED_HOST=%s", this.migrationContext.GetApplierHostname()))
env = append(env, fmt.Sprintf("GH_OST_INSPECTED_HOST=%s", this.migrationContext.GetInspectorHostname()))
env = append(env, fmt.Sprintf("GH_OST_EXECUTING_HOST=%s", this.migrationContext.Hostname))
env = append(env, fmt.Sprintf("GH_OST_HOOKS_HINT=%s", this.migrationContext.HooksHintMessage))

63
go/logic/inspect.go
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@ -63,7 +63,7 @@ func (this *Inspector) ValidateOriginalTable() (err error) {
if err := this.validateTable(); err != nil {
return err
}
if err := this.validateTableForeignKeys(); err != nil {
if err := this.validateTableForeignKeys(this.migrationContext.DiscardForeignKeys); err != nil {
return err
}
if err := this.validateTableTriggers(); err != nil {
@ -138,6 +138,20 @@ func (this *Inspector) InspectOriginalAndGhostTables() (err error) {
this.applyColumnTypes(this.migrationContext.DatabaseName, this.migrationContext.OriginalTableName, this.migrationContext.OriginalTableColumns, this.migrationContext.SharedColumns)
this.applyColumnTypes(this.migrationContext.DatabaseName, this.migrationContext.GetGhostTableName(), this.migrationContext.GhostTableColumns, this.migrationContext.MappedSharedColumns)
for i := range this.migrationContext.SharedColumns.Columns() {
column := this.migrationContext.SharedColumns.Columns()[i]
mappedColumn := this.migrationContext.MappedSharedColumns.Columns()[i]
if column.Name == mappedColumn.Name && column.Type == sql.DateTimeColumnType && mappedColumn.Type == sql.TimestampColumnType {
this.migrationContext.MappedSharedColumns.SetConvertDatetimeToTimestamp(column.Name, this.migrationContext.ApplierTimeZone)
}
}
for _, column := range this.migrationContext.UniqueKey.Columns.Columns() {
if this.migrationContext.MappedSharedColumns.HasTimezoneConversion(column.Name) {
return fmt.Errorf("No support at this time for converting a column from DATETIME to TIMESTAMP that is also part of the chosen unique key. Column: %s, key: %s", column.Name, this.migrationContext.UniqueKey.Name)
}
}
return nil
}
@ -313,7 +327,7 @@ func (this *Inspector) validateLogSlaveUpdates() error {
if err := this.db.QueryRow(query).Scan(&logSlaveUpdates); err != nil {
return err
}
if !logSlaveUpdates && !this.migrationContext.InspectorIsAlsoApplier() {
if !logSlaveUpdates && !this.migrationContext.InspectorIsAlsoApplier() && !this.migrationContext.IsTungsten {
return fmt.Errorf("%s:%d must have log_slave_updates enabled", this.connectionConfig.Key.Hostname, this.connectionConfig.Key.Port)
}
@ -349,9 +363,11 @@ func (this *Inspector) validateTable() error {
}
// validateTableForeignKeys makes sure no foreign keys exist on the migrated table
func (this *Inspector) validateTableForeignKeys() error {
func (this *Inspector) validateTableForeignKeys(allowChildForeignKeys bool) error {
query := `
SELECT TABLE_SCHEMA, TABLE_NAME
SELECT
SUM(REFERENCED_TABLE_NAME IS NOT NULL AND TABLE_SCHEMA=? AND TABLE_NAME=?) as num_child_side_fk,
SUM(REFERENCED_TABLE_NAME IS NOT NULL AND REFERENCED_TABLE_SCHEMA=? AND REFERENCED_TABLE_NAME=?) as num_parent_side_fk
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE
REFERENCED_TABLE_NAME IS NOT NULL
@ -359,24 +375,34 @@ func (this *Inspector) validateTableForeignKeys() error {
OR (REFERENCED_TABLE_SCHEMA=? AND REFERENCED_TABLE_NAME=?)
)
`
numForeignKeys := 0
err := sqlutils.QueryRowsMap(this.db, query, func(rowMap sqlutils.RowMap) error {
fkSchema := rowMap.GetString("TABLE_SCHEMA")
fkTable := rowMap.GetString("TABLE_NAME")
log.Infof("Found foreign key on %s.%s related to %s.%s", sql.EscapeName(fkSchema), sql.EscapeName(fkTable), sql.EscapeName(this.migrationContext.DatabaseName), sql.EscapeName(this.migrationContext.OriginalTableName))
numForeignKeys++
numParentForeignKeys := 0
numChildForeignKeys := 0
err := sqlutils.QueryRowsMap(this.db, query, func(m sqlutils.RowMap) error {
numChildForeignKeys = m.GetInt("num_child_side_fk")
numParentForeignKeys = m.GetInt("num_parent_side_fk")
return nil
},
this.migrationContext.DatabaseName,
this.migrationContext.OriginalTableName,
this.migrationContext.DatabaseName,
this.migrationContext.OriginalTableName,
this.migrationContext.DatabaseName,
this.migrationContext.OriginalTableName,
this.migrationContext.DatabaseName,
this.migrationContext.OriginalTableName,
)
if err != nil {
return err
}
if numForeignKeys > 0 {
return log.Errorf("Found %d foreign keys related to %s.%s. Foreign keys are not supported. Bailing out", numForeignKeys, sql.EscapeName(this.migrationContext.DatabaseName), sql.EscapeName(this.migrationContext.OriginalTableName))
if numParentForeignKeys > 0 {
return log.Errorf("Found %d parent-side foreign keys on %s.%s. Parent-side foreign keys are not supported. Bailing out", numParentForeignKeys, sql.EscapeName(this.migrationContext.DatabaseName), sql.EscapeName(this.migrationContext.OriginalTableName))
}
if numChildForeignKeys > 0 {
if allowChildForeignKeys {
log.Debugf("Foreign keys found and will be dropped, as per given --discard-foreign-keys flag")
return nil
}
return log.Errorf("Found %d child-side foreign keys on %s.%s. Child-side foreign keys are not supported. Bailing out", numChildForeignKeys, sql.EscapeName(this.migrationContext.DatabaseName), sql.EscapeName(this.migrationContext.OriginalTableName))
}
log.Debugf("Validated no foreign keys exist on table")
return nil
@ -490,11 +516,22 @@ func (this *Inspector) applyColumnTypes(databaseName, tableName string, columnsL
`
err := sqlutils.QueryRowsMap(this.db, query, func(m sqlutils.RowMap) error {
columnName := m.GetString("COLUMN_NAME")
if strings.Contains(m.GetString("COLUMN_TYPE"), "unsigned") {
columnType := m.GetString("COLUMN_TYPE")
if strings.Contains(columnType, "unsigned") {
for _, columnsList := range columnsLists {
columnsList.SetUnsigned(columnName)
}
}
if strings.Contains(columnType, "timestamp") {
for _, columnsList := range columnsLists {
columnsList.GetColumn(columnName).Type = sql.TimestampColumnType
}
}
if strings.Contains(columnType, "datetime") {
for _, columnsList := range columnsLists {
columnsList.GetColumn(columnName).Type = sql.DateTimeColumnType
}
}
if charset := m.GetString("CHARACTER_SET_NAME"); charset != "" {
for _, columnsList := range columnsLists {
columnsList.SetCharset(columnName, charset)

193
go/logic/migrator.go
View File

@ -6,14 +6,11 @@
package logic
import (
"bufio"
"fmt"
"io"
"math"
"os"
"os/signal"
"strconv"
"strings"
"sync/atomic"
"syscall"
"time"
@ -42,7 +39,8 @@ const (
type PrintStatusRule int
const (
HeuristicPrintStatusRule PrintStatusRule = iota
NoPrintStatusRule PrintStatusRule = iota
HeuristicPrintStatusRule = iota
ForcePrintStatusRule = iota
ForcePrintStatusOnlyRule = iota
ForcePrintStatusAndHintRule = iota
@ -63,11 +61,9 @@ type Migrator struct {
tablesInPlace chan bool
rowCopyComplete chan bool
allEventsUpToLockProcessed chan bool
panicAbort chan error
rowCopyCompleteFlag int64
inCutOverCriticalActionFlag int64
userCommandedUnpostponeFlag int64
// copyRowsQueue should not be buffered; if buffered some non-damaging but
// excessive work happens at the end of the iteration as new copy-jobs arrive befroe realizing the copy is complete
copyRowsQueue chan tableWriteFunc
@ -84,7 +80,6 @@ func NewMigrator() *Migrator {
firstThrottlingCollected: make(chan bool, 1),
rowCopyComplete: make(chan bool),
allEventsUpToLockProcessed: make(chan bool),
panicAbort: make(chan error),
copyRowsQueue: make(chan tableWriteFunc),
applyEventsQueue: make(chan tableWriteFunc, applyEventsQueueBuffer),
@ -148,7 +143,7 @@ func (this *Migrator) retryOperation(operation func() error, notFatalHint ...boo
// there's an error. Let's try again.
}
if len(notFatalHint) == 0 {
this.panicAbort <- err
this.migrationContext.PanicAbort <- err
}
return err
}
@ -217,7 +212,7 @@ func (this *Migrator) onChangelogStateEvent(dmlEvent *binlog.BinlogDMLEvent) (er
// listenOnPanicAbort aborts on abort request
func (this *Migrator) listenOnPanicAbort() {
err := <-this.panicAbort
err := <-this.migrationContext.PanicAbort
log.Fatale(err)
}
@ -385,7 +380,7 @@ func (this *Migrator) cutOver() (err error) {
if this.migrationContext.PostponeCutOverFlagFile == "" {
return false, nil
}
if atomic.LoadInt64(&this.userCommandedUnpostponeFlag) > 0 {
if atomic.LoadInt64(&this.migrationContext.UserCommandedUnpostponeFlag) > 0 {
return false, nil
}
if base.FileExists(this.migrationContext.PostponeCutOverFlagFile) {
@ -584,150 +579,12 @@ func (this *Migrator) atomicCutOver() (err error) {
return nil
}
// onServerCommand responds to a user's interactive command
func (this *Migrator) onServerCommand(command string, writer *bufio.Writer) (err error) {
defer writer.Flush()
tokens := strings.SplitN(command, "=", 2)
command = strings.TrimSpace(tokens[0])
arg := ""
if len(tokens) > 1 {
arg = strings.TrimSpace(tokens[1])
}
throttleHint := "# Note: you may only throttle for as long as your binary logs are not purged\n"
if err := this.hooksExecutor.onInteractiveCommand(command); err != nil {
return err
}
switch command {
case "help":
{
fmt.Fprintln(writer, `available commands:
status # Print a detailed status message
sup # Print a short status message
chunk-size=<newsize> # Set a new chunk-size
nice-ratio=<ratio> # Set a new nice-ratio, immediate sleep after each row-copy operation, float (examples: 0 is agrressive, 0.7 adds 70% runtime, 1.0 doubles runtime, 2.0 triples runtime, ...)
critical-load=<load> # Set a new set of max-load thresholds
max-lag-millis=<max-lag> # Set a new replication lag threshold
replication-lag-query=<query> # Set a new query that determines replication lag (no quotes)
max-load=<load> # Set a new set of max-load thresholds
throttle-query=<query> # Set a new throttle-query (no quotes)
throttle-control-replicas=<replicas> # Set a new comma delimited list of throttle control replicas
throttle # Force throttling
no-throttle # End forced throttling (other throttling may still apply)
unpostpone # Bail out a cut-over postpone; proceed to cut-over
panic # panic and quit without cleanup
help # This message
`)
}
case "sup":
this.printStatus(ForcePrintStatusOnlyRule, writer)
case "info", "status":
this.printStatus(ForcePrintStatusAndHintRule, writer)
case "chunk-size":
{
if chunkSize, err := strconv.Atoi(arg); err != nil {
fmt.Fprintf(writer, "%s\n", err.Error())
return log.Errore(err)
} else {
this.migrationContext.SetChunkSize(int64(chunkSize))
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
}
case "max-lag-millis":
{
if maxLagMillis, err := strconv.Atoi(arg); err != nil {
fmt.Fprintf(writer, "%s\n", err.Error())
return log.Errore(err)
} else {
this.migrationContext.SetMaxLagMillisecondsThrottleThreshold(int64(maxLagMillis))
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
}
case "replication-lag-query":
{
this.migrationContext.SetReplicationLagQuery(arg)
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
case "nice-ratio":
{
if niceRatio, err := strconv.ParseFloat(arg, 64); err != nil {
fmt.Fprintf(writer, "%s\n", err.Error())
return log.Errore(err)
} else {
this.migrationContext.SetNiceRatio(niceRatio)
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
}
case "max-load":
{
if err := this.migrationContext.ReadMaxLoad(arg); err != nil {
fmt.Fprintf(writer, "%s\n", err.Error())
return log.Errore(err)
}
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
case "critical-load":
{
if err := this.migrationContext.ReadCriticalLoad(arg); err != nil {
fmt.Fprintf(writer, "%s\n", err.Error())
return log.Errore(err)
}
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
case "throttle-query":
{
this.migrationContext.SetThrottleQuery(arg)
fmt.Fprintf(writer, throttleHint)
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
case "throttle-control-replicas":
{
if err := this.migrationContext.ReadThrottleControlReplicaKeys(arg); err != nil {
fmt.Fprintf(writer, "%s\n", err.Error())
return log.Errore(err)
}
fmt.Fprintf(writer, "%s\n", this.migrationContext.GetThrottleControlReplicaKeys().ToCommaDelimitedList())
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
case "throttle", "pause", "suspend":
{
atomic.StoreInt64(&this.migrationContext.ThrottleCommandedByUser, 1)
fmt.Fprintf(writer, throttleHint)
this.printStatus(ForcePrintStatusAndHintRule, writer)
}
case "no-throttle", "unthrottle", "resume", "continue":
{
atomic.StoreInt64(&this.migrationContext.ThrottleCommandedByUser, 0)
}
case "unpostpone", "no-postpone", "cut-over":
{
if atomic.LoadInt64(&this.migrationContext.IsPostponingCutOver) > 0 {
atomic.StoreInt64(&this.userCommandedUnpostponeFlag, 1)
fmt.Fprintf(writer, "Unpostponed\n")
} else {
fmt.Fprintf(writer, "You may only invoke this when gh-ost is actively postponing migration. At this time it is not.\n")
}
}
case "panic":
{
err := fmt.Errorf("User commanded 'panic'. I will now panic, without cleanup. PANIC!")
fmt.Fprintf(writer, "%s\n", err.Error())
this.panicAbort <- err
}
default:
err = fmt.Errorf("Unknown command: %s", command)
fmt.Fprintf(writer, "%s\n", err.Error())
return err
}
return nil
}
// initiateServer begins listening on unix socket/tcp for incoming interactive commands
func (this *Migrator) initiateServer() (err error) {
this.server = NewServer(this.onServerCommand)
var f printStatusFunc = func(rule PrintStatusRule, writer io.Writer) {
this.printStatus(rule, writer)
}
this.server = NewServer(this.hooksExecutor, f)
if err := this.server.BindSocketFile(); err != nil {
return err
}
@ -759,16 +616,22 @@ func (this *Migrator) initiateInspector() (err error) {
}
// So far so good, table is accessible and valid.
// Let's get master connection config
if this.migrationContext.AssumeMasterHostname == "" {
// No forced master host; detect master
if this.migrationContext.ApplierConnectionConfig, err = this.inspector.getMasterConnectionConfig(); err != nil {
return err
}
if this.migrationContext.AssumeMasterHostname != "" {
if key, err := mysql.ParseRawInstanceKeyLoose(this.migrationContext.AssumeMasterHostname); err != nil {
return err
log.Infof("Master found to be %+v", *this.migrationContext.ApplierConnectionConfig.ImpliedKey)
} else {
this.migrationContext.ApplierConnectionConfig.Key = *key
// Forced master host.
key, err := mysql.ParseRawInstanceKeyLoose(this.migrationContext.AssumeMasterHostname)
if err != nil {
return err
}
this.migrationContext.ApplierConnectionConfig = this.migrationContext.InspectorConnectionConfig.DuplicateCredentials(*key)
log.Infof("Master forced to be %+v", *this.migrationContext.ApplierConnectionConfig.ImpliedKey)
}
// validate configs
if this.migrationContext.TestOnReplica || this.migrationContext.MigrateOnReplica {
if this.migrationContext.InspectorIsAlsoApplier() {
return fmt.Errorf("Instructed to --test-on-replica or --migrate-on-replica, but the server we connect to doesn't seem to be a replica")
@ -781,13 +644,12 @@ func (this *Migrator) initiateInspector() (err error) {
this.migrationContext.AddThrottleControlReplicaKey(this.migrationContext.InspectorConnectionConfig.Key)
}
} else if this.migrationContext.InspectorIsAlsoApplier() && !this.migrationContext.AllowedRunningOnMaster {
return fmt.Errorf("It seems like this migration attempt to run directly on master. Preferably it would be executed on a replica (and this reduces load from the master). To proceed please provide --allow-on-master")
return fmt.Errorf("It seems like this migration attempt to run directly on master. Preferably it would be executed on a replica (and this reduces load from the master). To proceed please provide --allow-on-master. Inspector config=%+v, applier config=%+v", this.migrationContext.InspectorConnectionConfig, this.migrationContext.ApplierConnectionConfig)
}
if err := this.inspector.validateLogSlaveUpdates(); err != nil {
return err
}
log.Infof("Master found to be %+v", *this.migrationContext.ApplierConnectionConfig.ImpliedKey)
return nil
}
@ -887,21 +749,26 @@ func (this *Migrator) printMigrationStatusHint(writers ...io.Writer) {
// By default the status is written to standard output, but other writers can
// be used as well.
func (this *Migrator) printStatus(rule PrintStatusRule, writers ...io.Writer) {
if rule == NoPrintStatusRule {
return
}
writers = append(writers, os.Stdout)
elapsedTime := this.migrationContext.ElapsedTime()
elapsedSeconds := int64(elapsedTime.Seconds())
totalRowsCopied := this.migrationContext.GetTotalRowsCopied()
rowsEstimate := atomic.LoadInt64(&this.migrationContext.RowsEstimate) + atomic.LoadInt64(&this.migrationContext.RowsDeltaEstimate)
if atomic.LoadInt64(&this.rowCopyCompleteFlag) == 1 {
// Done copying rows. The totalRowsCopied value is the de-facto number of rows,
// and there is no further need to keep updating the value.
rowsEstimate = totalRowsCopied
}
var progressPct float64
if rowsEstimate == 0 {
progressPct = 100.0
} else {
progressPct = 100.0 * float64(totalRowsCopied) / float64(rowsEstimate)
}
if atomic.LoadInt64(&this.rowCopyCompleteFlag) == 1 {
progressPct = 100.0
}
// Before status, let's see if we should print a nice reminder for what exactly we're doing here.
shouldPrintMigrationStatusHint := (elapsedSeconds%600 == 0)
if rule == ForcePrintStatusAndHintRule {
@ -1005,7 +872,7 @@ func (this *Migrator) initiateStreaming() error {
log.Debugf("Beginning streaming")
err := this.eventsStreamer.StreamEvents(this.canStopStreaming)
if err != nil {
this.panicAbort <- err
this.migrationContext.PanicAbort <- err
}
log.Debugf("Done streaming")
}()
@ -1033,7 +900,7 @@ func (this *Migrator) addDMLEventsListener() error {
// initiateThrottler kicks in the throttling collection and the throttling checks.
func (this *Migrator) initiateThrottler() error {
this.throttler = NewThrottler(this.applier, this.inspector, this.panicAbort)
this.throttler = NewThrottler(this.applier, this.inspector)
go this.throttler.initiateThrottlerCollection(this.firstThrottlingCollected)
log.Infof("Waiting for first throttle metrics to be collected")

174
go/logic/server.go
View File

@ -8,27 +8,33 @@ package logic
import (
"bufio"
"fmt"
"io"
"net"
"os"
"strconv"
"strings"
"sync/atomic"
"github.com/github/gh-ost/go/base"
"github.com/outbrain/golib/log"
)
type onCommandFunc func(command string, writer *bufio.Writer) error
type printStatusFunc func(PrintStatusRule, io.Writer)
// Server listens for requests on a socket file or via TCP
type Server struct {
migrationContext *base.MigrationContext
unixListener net.Listener
tcpListener net.Listener
onCommand onCommandFunc
hooksExecutor *HooksExecutor
printStatus printStatusFunc
}
func NewServer(onCommand onCommandFunc) *Server {
func NewServer(hooksExecutor *HooksExecutor, printStatus printStatusFunc) *Server {
return &Server{
migrationContext: base.GetMigrationContext(),
onCommand: onCommand,
hooksExecutor: hooksExecutor,
printStatus: printStatus,
}
}
@ -94,5 +100,163 @@ func (this *Server) Serve() (err error) {
func (this *Server) handleConnection(conn net.Conn) (err error) {
defer conn.Close()
command, _, err := bufio.NewReader(conn).ReadLine()
return this.onCommand(string(command), bufio.NewWriter(conn))
return this.onServerCommand(string(command), bufio.NewWriter(conn))
}
// onServerCommand responds to a user's interactive command
func (this *Server) onServerCommand(command string, writer *bufio.Writer) (err error) {
defer writer.Flush()
printStatusRule, err := this.applyServerCommand(command, writer)
if err == nil {
this.printStatus(printStatusRule, writer)
} else {
fmt.Fprintf(writer, "%s\n", err.Error())
}
return log.Errore(err)
}
// applyServerCommand parses and executes commands by user
func (this *Server) applyServerCommand(command string, writer *bufio.Writer) (printStatusRule PrintStatusRule, err error) {
printStatusRule = NoPrintStatusRule
tokens := strings.SplitN(command, "=", 2)
command = strings.TrimSpace(tokens[0])
arg := ""
if len(tokens) > 1 {
arg = strings.TrimSpace(tokens[1])
}
throttleHint := "# Note: you may only throttle for as long as your binary logs are not purged\n"
if err := this.hooksExecutor.onInteractiveCommand(command); err != nil {
return NoPrintStatusRule, err
}
switch command {
case "help":
{
fmt.Fprintln(writer, `available commands:
status # Print a detailed status message
sup # Print a short status message
chunk-size=<newsize> # Set a new chunk-size
nice-ratio=<ratio> # Set a new nice-ratio, immediate sleep after each row-copy operation, float (examples: 0 is agrressive, 0.7 adds 70% runtime, 1.0 doubles runtime, 2.0 triples runtime, ...)
critical-load=<load> # Set a new set of max-load thresholds
max-lag-millis=<max-lag> # Set a new replication lag threshold
replication-lag-query=<query> # Set a new query that determines replication lag (no quotes)
max-load=<load> # Set a new set of max-load thresholds
throttle-query=<query> # Set a new throttle-query (no quotes)
throttle-control-replicas=<replicas> # Set a new comma delimited list of throttle control replicas
throttle # Force throttling
no-throttle # End forced throttling (other throttling may still apply)
unpostpone # Bail out a cut-over postpone; proceed to cut-over
panic # panic and quit without cleanup
help # This message
`)
}
case "sup":
return ForcePrintStatusOnlyRule, nil
case "info", "status":
return ForcePrintStatusAndHintRule, nil
case "chunk-size":
{
if chunkSize, err := strconv.Atoi(arg); err != nil {
return NoPrintStatusRule, err
} else {
this.migrationContext.SetChunkSize(int64(chunkSize))
return ForcePrintStatusAndHintRule, nil
}
}
case "max-lag-millis":
{
if maxLagMillis, err := strconv.Atoi(arg); err != nil {
return NoPrintStatusRule, err
} else {
this.migrationContext.SetMaxLagMillisecondsThrottleThreshold(int64(maxLagMillis))
return ForcePrintStatusAndHintRule, nil
}
}
case "replication-lag-query":
{
this.migrationContext.SetReplicationLagQuery(arg)
return ForcePrintStatusAndHintRule, nil
}
case "nice-ratio":
{
if niceRatio, err := strconv.ParseFloat(arg, 64); err != nil {
return NoPrintStatusRule, err
} else {
this.migrationContext.SetNiceRatio(niceRatio)
return ForcePrintStatusAndHintRule, nil
}
}
case "max-load":
{
if err := this.migrationContext.ReadMaxLoad(arg); err != nil {
return NoPrintStatusRule, err
}
return ForcePrintStatusAndHintRule, nil
}
case "critical-load":
{
if err := this.migrationContext.ReadCriticalLoad(arg); err != nil {
return NoPrintStatusRule, err
}
return ForcePrintStatusAndHintRule, nil
}
case "throttle-query":
{
this.migrationContext.SetThrottleQuery(arg)
fmt.Fprintf(writer, throttleHint)
return ForcePrintStatusAndHintRule, nil
}
case "throttle-control-replicas":
{
if err := this.migrationContext.ReadThrottleControlReplicaKeys(arg); err != nil {
return NoPrintStatusRule, err
}
fmt.Fprintf(writer, "%s\n", this.migrationContext.GetThrottleControlReplicaKeys().ToCommaDelimitedList())
return ForcePrintStatusAndHintRule, nil
}
case "throttle", "pause", "suspend":
{
atomic.StoreInt64(&this.migrationContext.ThrottleCommandedByUser, 1)
fmt.Fprintf(writer, throttleHint)
return ForcePrintStatusAndHintRule, nil
}
case "no-throttle", "unthrottle", "resume", "continue":
{
atomic.StoreInt64(&this.migrationContext.ThrottleCommandedByUser, 0)
return ForcePrintStatusAndHintRule, nil
}
case "unpostpone", "no-postpone", "cut-over":
{
if arg == "" && this.migrationContext.ForceNamedCutOverCommand {
err := fmt.Errorf("User commanded 'unpostpone' without specifying table name, but --force-named-cut-over is set")
return NoPrintStatusRule, err
}
if arg != "" && arg != this.migrationContext.OriginalTableName {
// User exlpicitly provided table name. This is a courtesy protection mechanism
err := fmt.Errorf("User commanded 'unpostpone' on %s, but migrated table is %s; ingoring request.", arg, this.migrationContext.OriginalTableName)
return NoPrintStatusRule, err
}
if atomic.LoadInt64(&this.migrationContext.IsPostponingCutOver) > 0 {
atomic.StoreInt64(&this.migrationContext.UserCommandedUnpostponeFlag, 1)
fmt.Fprintf(writer, "Unpostponed\n")
return ForcePrintStatusAndHintRule, nil
}
fmt.Fprintf(writer, "You may only invoke this when gh-ost is actively postponing migration. At this time it is not.\n")
return NoPrintStatusRule, nil
}
case "panic":
{
err := fmt.Errorf("User commanded 'panic'. I will now panic, without cleanup. PANIC!")
this.migrationContext.PanicAbort <- err
return NoPrintStatusRule, err
}
default:
err = fmt.Errorf("Unknown command: %s", command)
return NoPrintStatusRule, err
}
return NoPrintStatusRule, nil
}

2
go/logic/streamer.go
View File

@ -204,7 +204,7 @@ func (this *EventsStreamer) StreamEvents(canStopStreaming func() bool) error {
successiveFailures = 0
}
if successiveFailures > this.migrationContext.MaxRetries() {
return fmt.Errorf("%d successive failures in streamer reconnect at coordinates %+v", lastAppliedRowsEventHint)
return fmt.Errorf("%d successive failures in streamer reconnect at coordinates %+v", successiveFailures, this.GetReconnectBinlogCoordinates())
}
// Reposition at same binlog file.

38
go/logic/throttler.go
View File

@ -21,15 +21,13 @@ type Throttler struct {
migrationContext *base.MigrationContext
applier *Applier
inspector *Inspector
panicAbort chan error
}
func NewThrottler(applier *Applier, inspector *Inspector, panicAbort chan error) *Throttler {
func NewThrottler(applier *Applier, inspector *Inspector) *Throttler {
return &Throttler{
migrationContext: base.GetMigrationContext(),
applier: applier,
inspector: inspector,
panicAbort: panicAbort,
}
}
@ -132,6 +130,20 @@ func (this *Throttler) collectControlReplicasLag() {
}
}
func (this *Throttler) criticalLoadIsMet() (met bool, variableName string, value int64, threshold int64, err error) {
criticalLoad := this.migrationContext.GetCriticalLoad()
for variableName, threshold = range criticalLoad {
value, err = this.applier.ShowStatusVariable(variableName)
if err != nil {
return false, variableName, value, threshold, err
}
if value >= threshold {
return true, variableName, value, threshold, nil
}
}
return false, variableName, value, threshold, nil
}
// collectGeneralThrottleMetrics reads the once-per-sec metrics, and stores them onto this.migrationContext
func (this *Throttler) collectGeneralThrottleMetrics() error {
@ -143,18 +155,26 @@ func (this *Throttler) collectGeneralThrottleMetrics() error {
// Regardless of throttle, we take opportunity to check for panic-abort
if this.migrationContext.PanicFlagFile != "" {
if base.FileExists(this.migrationContext.PanicFlagFile) {
this.panicAbort <- fmt.Errorf("Found panic-file %s. Aborting without cleanup", this.migrationContext.PanicFlagFile)
this.migrationContext.PanicAbort <- fmt.Errorf("Found panic-file %s. Aborting without cleanup", this.migrationContext.PanicFlagFile)
}
}
criticalLoad := this.migrationContext.GetCriticalLoad()
for variableName, threshold := range criticalLoad {
value, err := this.applier.ShowStatusVariable(variableName)
criticalLoadMet, variableName, value, threshold, err := this.criticalLoadIsMet()
if err != nil {
return setThrottle(true, fmt.Sprintf("%s %s", variableName, err))
}
if value >= threshold {
this.panicAbort <- fmt.Errorf("critical-load met: %s=%d, >=%d", variableName, value, threshold)
if criticalLoadMet && this.migrationContext.CriticalLoadIntervalMilliseconds == 0 {
this.migrationContext.PanicAbort <- fmt.Errorf("critical-load met: %s=%d, >=%d", variableName, value, threshold)
}
if criticalLoadMet && this.migrationContext.CriticalLoadIntervalMilliseconds > 0 {
log.Errorf("critical-load met once: %s=%d, >=%d. Will check again in %d millis", variableName, value, threshold, this.migrationContext.CriticalLoadIntervalMilliseconds)
go func() {
timer := time.NewTimer(time.Millisecond * time.Duration(this.migrationContext.CriticalLoadIntervalMilliseconds))
<-timer.C
if criticalLoadMetAgain, variableName, value, threshold, _ := this.criticalLoadIsMet(); criticalLoadMetAgain {
this.migrationContext.PanicAbort <- fmt.Errorf("critical-load met again after %d millis: %s=%d, >=%d", this.migrationContext.CriticalLoadIntervalMilliseconds, variableName, value, threshold)
}
}()
}
// Back to throttle considerations

12
go/mysql/connection.go
View File

@ -26,12 +26,10 @@ func NewConnectionConfig() *ConnectionConfig {
return config
}
func (this *ConnectionConfig) Duplicate() *ConnectionConfig {
// DuplicateCredentials creates a new connection config with given key and with same credentials as this config
func (this *ConnectionConfig) DuplicateCredentials(key InstanceKey) *ConnectionConfig {
config := &ConnectionConfig{
Key: InstanceKey{
Hostname: this.Key.Hostname,
Port: this.Key.Port,
},
Key: key,
User: this.User,
Password: this.Password,
}
@ -39,6 +37,10 @@ func (this *ConnectionConfig) Duplicate() *ConnectionConfig {
return config
}
func (this *ConnectionConfig) Duplicate() *ConnectionConfig {
return this.DuplicateCredentials(this.Key)
}
func (this *ConnectionConfig) String() string {
return fmt.Sprintf("%s, user=%s", this.Key.DisplayString(), this.User)
}

57
go/mysql/connection_test.go Normal file
View File

@ -0,0 +1,57 @@
/*
Copyright 2016 GitHub Inc.
See https://github.com/github/gh-ost/blob/master/LICENSE
*/
package mysql
import (
"testing"
"github.com/outbrain/golib/log"
test "github.com/outbrain/golib/tests"
)
func init() {
log.SetLevel(log.ERROR)
}
func TestNewConnectionConfig(t *testing.T) {
c := NewConnectionConfig()
test.S(t).ExpectEquals(c.Key.Hostname, "")
test.S(t).ExpectEquals(c.Key.Port, 0)
test.S(t).ExpectEquals(c.ImpliedKey.Hostname, "")
test.S(t).ExpectEquals(c.ImpliedKey.Port, 0)
test.S(t).ExpectEquals(c.User, "")
test.S(t).ExpectEquals(c.Password, "")
}
func TestDuplicateCredentials(t *testing.T) {
c := NewConnectionConfig()
c.Key = InstanceKey{Hostname: "myhost", Port: 3306}
c.User = "gromit"
c.Password = "penguin"
dup := c.DuplicateCredentials(InstanceKey{Hostname: "otherhost", Port: 3310})
test.S(t).ExpectEquals(dup.Key.Hostname, "otherhost")
test.S(t).ExpectEquals(dup.Key.Port, 3310)
test.S(t).ExpectEquals(dup.ImpliedKey.Hostname, "otherhost")
test.S(t).ExpectEquals(dup.ImpliedKey.Port, 3310)
test.S(t).ExpectEquals(dup.User, "gromit")
test.S(t).ExpectEquals(dup.Password, "penguin")
}
func TestDuplicate(t *testing.T) {
c := NewConnectionConfig()
c.Key = InstanceKey{Hostname: "myhost", Port: 3306}
c.User = "gromit"
c.Password = "penguin"
dup := c.Duplicate()
test.S(t).ExpectEquals(dup.Key.Hostname, "myhost")
test.S(t).ExpectEquals(dup.Key.Port, 3306)
test.S(t).ExpectEquals(dup.ImpliedKey.Hostname, "myhost")
test.S(t).ExpectEquals(dup.ImpliedKey.Port, 3306)
test.S(t).ExpectEquals(dup.User, "gromit")
test.S(t).ExpectEquals(dup.Password, "penguin")
}

43
go/sql/builder.go
View File

@ -32,6 +32,20 @@ func EscapeName(name string) string {
return fmt.Sprintf("`%s`", name)
}
func buildColumnsPreparedValues(columns *ColumnList) []string {
values := make([]string, columns.Len(), columns.Len())
for i, column := range columns.Columns() {
var token string
if column.timezoneConversion != nil {
token = fmt.Sprintf("convert_tz(?, '%s', '%s')", column.timezoneConversion.ToTimezone, "+00:00")
} else {
token = "?"
}
values[i] = token
}
return values
}
func buildPreparedValues(length int) []string {
values := make([]string, length, length)
for i := 0; i < length; i++ {
@ -83,13 +97,19 @@ func BuildEqualsPreparedComparison(columns []string) (result string, err error)
return BuildEqualsComparison(columns, values)
}
func BuildSetPreparedClause(columns []string) (result string, err error) {
if len(columns) == 0 {
func BuildSetPreparedClause(columns *ColumnList) (result string, err error) {
if columns.Len() == 0 {
return "", fmt.Errorf("Got 0 columns in BuildSetPreparedClause")
}
setTokens := []string{}
for _, column := range columns {
setTokens = append(setTokens, fmt.Sprintf("%s=?", EscapeName(column)))
for _, column := range columns.Columns() {
var setToken string
if column.timezoneConversion != nil {
setToken = fmt.Sprintf("%s=convert_tz(?, '%s', '%s')", EscapeName(column.Name), column.timezoneConversion.ToTimezone, "+00:00")
} else {
setToken = fmt.Sprintf("%s=?", EscapeName(column.Name))
}
setTokens = append(setTokens, setToken)
}
return strings.Join(setTokens, ", "), nil
}
@ -344,7 +364,7 @@ func BuildDMLInsertQuery(databaseName, tableName string, tableColumns, sharedCol
databaseName = EscapeName(databaseName)
tableName = EscapeName(tableName)
for _, column := range mappedSharedColumns.Columns() {
for _, column := range sharedColumns.Columns() {
tableOrdinal := tableColumns.Ordinals[column.Name]
arg := column.convertArg(args[tableOrdinal])
sharedArgs = append(sharedArgs, arg)
@ -354,7 +374,7 @@ func BuildDMLInsertQuery(databaseName, tableName string, tableColumns, sharedCol
for i := range mappedSharedColumnNames {
mappedSharedColumnNames[i] = EscapeName(mappedSharedColumnNames[i])
}
preparedValues := buildPreparedValues(mappedSharedColumns.Len())
preparedValues := buildColumnsPreparedValues(mappedSharedColumns)
result = fmt.Sprintf(`
replace /* gh-ost %s.%s */ into
@ -392,10 +412,9 @@ func BuildDMLUpdateQuery(databaseName, tableName string, tableColumns, sharedCol
databaseName = EscapeName(databaseName)
tableName = EscapeName(tableName)
for i, column := range sharedColumns.Columns() {
mappedColumn := mappedSharedColumns.Columns()[i]
for _, column := range sharedColumns.Columns() {
tableOrdinal := tableColumns.Ordinals[column.Name]
arg := mappedColumn.convertArg(valueArgs[tableOrdinal])
arg := column.convertArg(valueArgs[tableOrdinal])
sharedArgs = append(sharedArgs, arg)
}
@ -405,11 +424,7 @@ func BuildDMLUpdateQuery(databaseName, tableName string, tableColumns, sharedCol
uniqueKeyArgs = append(uniqueKeyArgs, arg)
}
mappedSharedColumnNames := duplicateNames(mappedSharedColumns.Names())
for i := range mappedSharedColumnNames {
mappedSharedColumnNames[i] = EscapeName(mappedSharedColumnNames[i])
}
setClause, err := BuildSetPreparedClause(mappedSharedColumnNames)
setClause, err := BuildSetPreparedClause(mappedSharedColumns)
equalsComparison, err := BuildEqualsPreparedComparison(uniqueKeyColumns.Names())
result = fmt.Sprintf(`

6
go/sql/builder_test.go
View File

@ -79,19 +79,19 @@ func TestBuildEqualsPreparedComparison(t *testing.T) {
func TestBuildSetPreparedClause(t *testing.T) {
{
columns := []string{"c1"}
columns := NewColumnList([]string{"c1"})
clause, err := BuildSetPreparedClause(columns)
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(clause, "`c1`=?")
}
{
columns := []string{"c1", "c2"}
columns := NewColumnList([]string{"c1", "c2"})
clause, err := BuildSetPreparedClause(columns)
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(clause, "`c1`=?, `c2`=?")
}
{
columns := []string{}
columns := NewColumnList([]string{})
_, err := BuildSetPreparedClause(columns)
test.S(t).ExpectNotNil(err)
}

45
go/sql/types.go
View File

@ -12,10 +12,24 @@ import (
"strings"
)
type ColumnType int
const (
UnknownColumnType ColumnType = iota
TimestampColumnType = iota
DateTimeColumnType = iota
)
type TimezoneConvertion struct {
ToTimezone string
}
type Column struct {
Name string
IsUnsigned bool
Charset string
Type ColumnType
timezoneConversion *TimezoneConvertion
}
func (this *Column) convertArg(arg interface{}) interface{} {
@ -112,20 +126,43 @@ func (this *ColumnList) Names() []string {
return names
}
func (this *ColumnList) GetColumn(columnName string) *Column {
if ordinal, ok := this.Ordinals[columnName]; ok {
return &this.columns[ordinal]
}
return nil
}
func (this *ColumnList) SetUnsigned(columnName string) {
this.columns[this.Ordinals[columnName]].IsUnsigned = true
this.GetColumn(columnName).IsUnsigned = true
}
func (this *ColumnList) IsUnsigned(columnName string) bool {
return this.columns[this.Ordinals[columnName]].IsUnsigned
return this.GetColumn(columnName).IsUnsigned
}
func (this *ColumnList) SetCharset(columnName string, charset string) {
this.columns[this.Ordinals[columnName]].Charset = charset
this.GetColumn(columnName).Charset = charset
}
func (this *ColumnList) GetCharset(columnName string) string {
return this.columns[this.Ordinals[columnName]].Charset
return this.GetColumn(columnName).Charset
}
func (this *ColumnList) SetColumnType(columnName string, columnType ColumnType) {
this.GetColumn(columnName).Type = columnType
}
func (this *ColumnList) GetColumnType(columnName string) ColumnType {
return this.GetColumn(columnName).Type
}
func (this *ColumnList) SetConvertDatetimeToTimestamp(columnName string, toTimezone string) {
this.GetColumn(columnName).timezoneConversion = &TimezoneConvertion{ToTimezone: toTimezone}
}
func (this *ColumnList) HasTimezoneConversion(columnName string) bool {
return this.GetColumn(columnName).timezoneConversion != nil
}
func (this *ColumnList) String() string {

14
go/sql/types_test.go
View File

@ -28,3 +28,17 @@ func TestParseColumnList(t *testing.T) {
test.S(t).ExpectEquals(columnList.Ordinals["category"], 1)
test.S(t).ExpectEquals(columnList.Ordinals["max_len"], 2)
}
func TestGetColumn(t *testing.T) {
names := "id,category,max_len"
columnList := ParseColumnList(names)
{
column := columnList.GetColumn("category")
test.S(t).ExpectTrue(column != nil)
test.S(t).ExpectEquals(column.Name, "category")
}
{
column := columnList.GetColumn("no_such_column")
test.S(t).ExpectTrue(column == nil)
}
}

28
localtests/alter-charset-all-dml/create.sql Normal file
View File

@ -0,0 +1,28 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
t1 varchar(128) charset latin1 collate latin1_swedish_ci,
t2 varchar(128) charset latin1 collate latin1_swedish_ci,
tutf8 varchar(128) charset utf8,
tutf8mb4 varchar(128) charset utf8mb4,
random_value varchar(128) charset ascii,
primary key(id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, md5(rand()), md5(rand()), md5(rand()), md5(rand()), md5(rand()));
insert into gh_ost_test values (null, 'átesting', 'átesting', 'átesting', 'átesting', md5(rand()));
insert into gh_ost_test values (null, 'átesting_del', 'átesting', 'átesting', 'átesting', md5(rand()));
insert into gh_ost_test values (null, 'testátest', 'testátest', 'testátest', '🍻😀', md5(rand()));
update gh_ost_test set t1='átesting2' where t1='átesting' order by id desc limit 1;
delete from gh_ost_test where t1='átesting_del' order by id desc limit 1;
end ;;

1
localtests/alter-charset-all-dml/extra_args Normal file
View File

@ -0,0 +1 @@
--alter='MODIFY `t1` varchar(128) CHARACTER SET utf8mb4 NOT NULL, MODIFY `t2` varchar(128) CHARACTER SET latin2 NOT NULL, MODIFY `tutf8` varchar(128) CHARACTER SET latin1 NOT NULL'

24
localtests/alter-charset/create.sql Normal file
View File

@ -0,0 +1,24 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
t1 varchar(128) charset latin1 collate latin1_swedish_ci,
t2 varchar(128) charset latin1 collate latin1_swedish_ci,
tutf8 varchar(128) charset utf8,
tutf8mb4 varchar(128) charset utf8mb4,
primary key(id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, md5(rand()), md5(rand()), md5(rand()), md5(rand()));
insert into gh_ost_test values (null, 'átesting', 'átesting', 'átesting', 'átesting');
insert into gh_ost_test values (null, 'testátest', 'testátest', 'testátest', '🍻😀');
end ;;

1
localtests/alter-charset/extra_args Normal file
View File

@ -0,0 +1 @@
--alter='MODIFY `t1` varchar(128) CHARACTER SET utf8mb4 NOT NULL, MODIFY `t2` varchar(128) CHARACTER SET latin2 NOT NULL, MODIFY `tutf8` varchar(128) CHARACTER SET latin1 NOT NULL'

31
localtests/datetime-to-timestamp-pk-fail/create.sql Normal file
View File

@ -0,0 +1,31 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int unsigned auto_increment,
i int not null,
ts0 timestamp default current_timestamp,
ts1 timestamp,
dt2 datetime,
t datetime,
updated tinyint unsigned default 0,
primary key(id, t),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 7, null, now(), now(), '2010-10-20 10:20:30', 0);
insert into gh_ost_test values (null, 11, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 11 order by id desc limit 1;
insert into gh_ost_test values (null, 13, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set t=t + interval 1 minute, updated = 1 where i = 13 order by id desc limit 1;
end ;;

1
localtests/datetime-to-timestamp-pk-fail/expect_failure Normal file
View File

@ -0,0 +1 @@
No support at this time for converting a column from DATETIME to TIMESTAMP that is also part of the chosen unique key

1
localtests/datetime-to-timestamp-pk-fail/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column t t timestamp not null"

31
localtests/datetime-to-timestamp/create.sql Normal file
View File

@ -0,0 +1,31 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int unsigned auto_increment,
i int not null,
ts0 timestamp default current_timestamp,
ts1 timestamp,
dt2 datetime,
t datetime,
updated tinyint unsigned default 0,
primary key(id),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 7, null, now(), now(), '2010-10-20 10:20:30', 0);
insert into gh_ost_test values (null, 11, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 11 order by id desc limit 1;
insert into gh_ost_test values (null, 13, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set t=t + interval 1 minute, updated = 1 where i = 13 order by id desc limit 1;
end ;;

1
localtests/datetime-to-timestamp/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column t t timestamp not null"

37
localtests/datetime/create.sql Normal file
View File

@ -0,0 +1,37 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
dt0 datetime default current_timestamp,
dt1 datetime,
dt2 datetime,
updated tinyint unsigned default 0,
primary key(id),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, null, now(), now(), 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 11 order by id desc limit 1;
insert into gh_ost_test values (null, 13, null, now(), now(), 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 13 order by id desc limit 1;
insert into gh_ost_test values (null, 17, null, now(), now(), 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 17 order by id desc limit 1;
insert into gh_ost_test values (null, 19, null, now(), now(), 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 19 order by id desc limit 1;
insert into gh_ost_test values (null, 23, null, now(), now(), 0);
update gh_ost_test set dt2=now() + interval 1 minute, updated = 1 where i = 23 order by id desc limit 1;
end ;;

32
localtests/discard-fk/create.sql Normal file
View File

@ -0,0 +1,32 @@
drop table if exists gh_ost_test_child;
drop table if exists gh_ost_test;
drop table if exists gh_ost_test_fk_parent;
create table gh_ost_test_fk_parent (
id int auto_increment,
ts timestamp,
primary key(id)
);
create table gh_ost_test (
id int auto_increment,
i int not null,
parent_id int not null,
primary key(id),
constraint test_fk foreign key (parent_id) references gh_ost_test_fk_parent (id) on delete no action
) auto_increment=1;
insert into gh_ost_test_fk_parent (id) values (1),(2),(3);
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, 1);
insert into gh_ost_test values (null, 13, 2);
insert into gh_ost_test values (null, 17, 3);
end ;;

1
localtests/discard-fk/extra_args Normal file
View File

@ -0,0 +1 @@
--discard-foreign-keys

41
localtests/fail-fk-parent/create.sql Normal file
View File

@ -0,0 +1,41 @@
drop table if exists gh_ost_test_child;
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
primary key(id)
) engine=innodb auto_increment=1;
create table gh_ost_test_child (
id int auto_increment,
i int not null,
parent_id int not null,
constraint test_fk foreign key (parent_id) references gh_ost_test (id) on delete no action,
primary key(id)
) engine=innodb;
insert into gh_ost_test (id) values (1),(2),(3);
drop event if exists gh_ost_test;
drop event if exists gh_ost_test_cleanup;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test_child values (null, 11, 1);
insert into gh_ost_test_child values (null, 13, 2);
insert into gh_ost_test_child values (null, 17, 3);
end ;;
create event gh_ost_test_cleanup
on schedule at current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
drop table if exists gh_ost_test_child;
end ;;

1
localtests/fail-fk-parent/destroy.sql Normal file
View File

@ -0,0 +1 @@
drop table if exists gh_ost_test_child;

1
localtests/fail-fk-parent/expect_failure Normal file
View File

@ -0,0 +1 @@
Parent-side foreign keys are not supported

1
localtests/fail-fk-parent/extra_args Normal file
View File

@ -0,0 +1 @@
--discard-foreign-keys

32
localtests/fail-fk/create.sql Normal file
View File

@ -0,0 +1,32 @@
drop table if exists gh_ost_test_child;
drop table if exists gh_ost_test;
drop table if exists gh_ost_test_fk_parent;
create table gh_ost_test_fk_parent (
id int auto_increment,
ts timestamp,
primary key(id)
);
create table gh_ost_test (
id int auto_increment,
i int not null,
parent_id int not null,
primary key(id),
constraint test_fk foreign key (parent_id) references gh_ost_test_fk_parent (id) on delete no action
) auto_increment=1;
insert into gh_ost_test_fk_parent (id) values (1),(2),(3);
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, 1);
insert into gh_ost_test values (null, 13, 2);
insert into gh_ost_test values (null, 17, 3);
end ;;

1
localtests/fail-fk/expect_failure Normal file
View File

@ -0,0 +1 @@
Child-side foreign keys are not supported. Bailing out

22
localtests/rename-inserts-only/create.sql Normal file
View File

@ -0,0 +1,22 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
c1 int not null,
c2 int not null,
primary key (id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, 23);
insert into gh_ost_test values (null, 13, 23);
insert into gh_ost_test values (null, floor(rand()*pow(2,32)), floor(rand()*pow(2,32)));
end ;;

1
localtests/rename-inserts-only/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column c2 c3 int not null" --approve-renamed-columns

26
localtests/rename-reorder-column/create.sql Normal file
View File

@ -0,0 +1,26 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
c1 int not null,
c2 int not null,
primary key (id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert ignore into gh_ost_test values (1, 11, 23);
insert ignore into gh_ost_test values (2, 13, 23);
insert into gh_ost_test values (null, 17, 23);
set @last_insert_id := last_insert_id();
update gh_ost_test set c1=c1+@last_insert_id, c2=c2+@last_insert_id where id=@last_insert_id order by id desc limit 1;
delete from gh_ost_test where id=1;
delete from gh_ost_test where c1=13; -- id=2
end ;;

1
localtests/rename-reorder-column/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column c2 c2a int not null after id" --approve-renamed-columns

1
localtests/rename-reorder-column/ghost_columns Normal file
View File

@ -0,0 +1 @@
id, c1, c2a

1
localtests/rename-reorder-column/orig_columns Normal file
View File

@ -0,0 +1 @@
id, c1, c2

27
localtests/rename-reorder-columns/create.sql Normal file
View File

@ -0,0 +1,27 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
c1 int not null,
c2 int not null,
c3 int not null,
primary key (id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert ignore into gh_ost_test values (1, 11, 23, 97);
insert ignore into gh_ost_test values (2, 13, 27, 61);
insert into gh_ost_test values (null, 17, 31, 53);
set @last_insert_id := last_insert_id();
update gh_ost_test set c1=c1+@last_insert_id, c2=c2+@last_insert_id, c3=c3+@last_insert_id where id=@last_insert_id order by id desc limit 1;
delete from gh_ost_test where id=1;
delete from gh_ost_test where c1=13; -- id=2
end ;;

1
localtests/rename-reorder-columns/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column c2 c2a int not null, change column c3 c3 int not null after id" --approve-renamed-columns

1
localtests/rename-reorder-columns/ghost_columns Normal file
View File

@ -0,0 +1 @@
id, c1, c2a, c3

1
localtests/rename-reorder-columns/orig_columns Normal file
View File

@ -0,0 +1 @@
id, c1, c2, c3

26
localtests/reorder-columns/create.sql Normal file
View File

@ -0,0 +1,26 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
c1 int not null,
c2 int not null,
primary key (id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert ignore into gh_ost_test values (1, 11, 23);
insert ignore into gh_ost_test values (2, 13, 29);
insert into gh_ost_test values (null, 17, 31);
set @last_insert_id := last_insert_id();
update gh_ost_test set c1=c1+@last_insert_id, c2=c2+@last_insert_id where id=@last_insert_id order by id desc limit 1;
delete from gh_ost_test where id=1;
delete from gh_ost_test where c1=13;
end ;;

1
localtests/reorder-columns/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column c2 c2 int not null after id"

1
localtests/reorder-columns/ghost_columns Normal file
View File

@ -0,0 +1 @@
id, c1, c2

1
localtests/reorder-columns/orig_columns Normal file
View File

@ -0,0 +1 @@
id, c1, c2

55
localtests/test.sh
View File

@ -9,6 +9,7 @@
tests_path=$(dirname $0)
test_logfile=/tmp/gh-ost-test.log
ghost_binary=/tmp/gh-ost-test
exec_command_file=/tmp/gh-ost-test.bash
test_pattern="${1:-.}"
@ -56,15 +57,19 @@ test_single() {
if [ -f $tests_path/$test_name/extra_args ] ; then
extra_args=$(cat $tests_path/$test_name/extra_args)
fi
columns="*"
if [ -f $tests_path/$test_name/test_columns ] ; then
columns=$(cat $tests_path/$test_name/test_columns)
orig_columns="*"
ghost_columns="*"
if [ -f $tests_path/$test_name/orig_columns ] ; then
orig_columns=$(cat $tests_path/$test_name/orig_columns)
fi
if [ -f $tests_path/$test_name/ghost_columns ] ; then
ghost_columns=$(cat $tests_path/$test_name/ghost_columns)
fi
# graceful sleep for replica to catch up
echo_dot
sleep 1
#
cmd="go run go/cmd/gh-ost/main.go \
cmd="$ghost_binary \
--user=gh-ost \
--password=gh-ost \
--host=$replica_host \
@ -91,27 +96,59 @@ test_single() {
echo_dot
bash $exec_command_file 1> $test_logfile 2>&1
if [ $? -ne 0 ] ; then
execution_result=$?
if [ -f $tests_path/$test_name/destroy.sql ] ; then
gh-ost-test-mysql-master --default-character-set=utf8mb4 test < $tests_path/$test_name/destroy.sql
fi
if [ -f $tests_path/$test_name/expect_failure ] ; then
if [ $execution_result -eq 0 ] ; then
echo
echo "ERROR $test_name execution was expected to exit on error but did not. cat $test_logfile"
return 1
fi
if [ -s $tests_path/$test_name/expect_failure ] ; then
# 'expect_failure' file has content. We expect to find this content in the log.
expected_error_message="$(cat $tests_path/$test_name/expect_failure)"
if grep -q "$expected_error_message" $test_logfile ; then
return 0
fi
echo
echo "ERROR $test_name execution was expected to exit with error message '${expected_error_message}' but did not. cat $test_logfile"
return 1
fi
# 'expect_failure' file has no content. We generally agree that the failure is correct
return 0
fi
if [ $execution_result -ne 0 ] ; then
echo
echo "ERROR $test_name execution failure. cat $test_logfile"
return 1
fi
echo_dot
orig_checksum=$(gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from gh_ost_test" -ss | md5sum)
ghost_checksum=$(gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from _gh_ost_test_gho" -ss | md5sum)
orig_checksum=$(gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${orig_columns} from gh_ost_test" -ss | md5sum)
ghost_checksum=$(gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${ghost_columns} from _gh_ost_test_gho" -ss | md5sum)
if [ "$orig_checksum" != "$ghost_checksum" ] ; then
echo "ERROR $test_name: checksum mismatch"
echo "---"
gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from gh_ost_test" -ss
gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${orig_columns} from gh_ost_test" -ss
echo "---"
gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${columns} from _gh_ost_test_gho" -ss
gh-ost-test-mysql-replica --default-character-set=utf8mb4 test -e "select ${ghost_columns} from _gh_ost_test_gho" -ss
return 1
fi
}
build_binary() {
echo "Building"
go build -o $ghost_binary go/cmd/gh-ost/main.go
}
test_all() {
build_binary
find $tests_path ! -path . -type d -mindepth 1 -maxdepth 1 | cut -d "/" -f 3 | egrep "$test_pattern" | while read test_name ; do
test_single "$test_name"
if [ $? -ne 0 ] ; then

33
localtests/timestamp-datetime/create.sql Normal file
View File

@ -0,0 +1,33 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
ts timestamp default current_timestamp,
dt datetime,
ts2ts timestamp null,
ts2dt datetime null,
dt2ts timestamp null,
dt2dt datetime null,
updated tinyint unsigned default 0,
primary key(id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, now(), now(),null, null, null, null, 0);
update gh_ost_test set ts2ts=ts, ts2dt=ts, dt2ts=dt, dt2dt=dt where i = 11 order by id desc limit 1;
insert into gh_ost_test values (null, 13, null, now(), now(), 0);
update gh_ost_test set ts2ts=ts, ts2dt=ts, dt2ts=dt, dt2dt=dt where i = 13 order by id desc limit 1;
insert into gh_ost_test values (null, 17, null, '2016-07-06 10:20:30', '2016-07-06 10:20:30', 0);
update gh_ost_test set ts2ts=ts, ts2dt=ts, dt2ts=dt, dt2dt=dt where i = 17 order by id desc limit 1;
end ;;

31
localtests/timestamp-to-datetime/create.sql Normal file
View File

@ -0,0 +1,31 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
ts0 timestamp default current_timestamp,
ts1 timestamp,
dt2 datetime,
t datetime,
updated tinyint unsigned default 0,
primary key(id),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 7, null, now(), now(), '2010-10-20 10:20:30', 0);
insert into gh_ost_test values (null, 11, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 11 order by id desc limit 1;
insert into gh_ost_test values (null, 13, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 13 order by id desc limit 1;
end ;;

1
localtests/timestamp-to-datetime/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column t t datetime not null"

37
localtests/timestamp/create.sql Normal file
View File

@ -0,0 +1,37 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
ts0 timestamp default current_timestamp,
ts1 timestamp,
ts2 timestamp,
updated tinyint unsigned default 0,
primary key(id),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 11 order by id desc limit 1;
insert into gh_ost_test values (null, 13, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 13 order by id desc limit 1;
insert into gh_ost_test values (null, 17, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 17 order by id desc limit 1;
insert into gh_ost_test values (null, 19, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 19 order by id desc limit 1;
insert into gh_ost_test values (null, 23, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 23 order by id desc limit 1;
end ;;

44
localtests/tz-datetime-ts/create.sql Normal file
View File

@ -0,0 +1,44 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
ts0 timestamp default current_timestamp,
ts1 timestamp,
dt2 datetime,
t datetime,
updated tinyint unsigned default 0,
primary key(id),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 7, null, now(), now(), '2010-10-20 10:20:30', 0);
insert into gh_ost_test values (null, 11, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 11 order by id desc limit 1;
set session time_zone='system';
insert into gh_ost_test values (null, 13, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 13 order by id desc limit 1;
set session time_zone='+00:00';
insert into gh_ost_test values (null, 17, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 17 order by id desc limit 1;
set session time_zone='-03:00';
insert into gh_ost_test values (null, 19, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 19 order by id desc limit 1;
set session time_zone='+05:00';
insert into gh_ost_test values (null, 23, null, now(), now(), '2010-10-20 10:20:30', 0);
update gh_ost_test set ts2=now() + interval 1 minute, updated = 1 where i = 23 order by id desc limit 1;
end ;;

1
localtests/tz-datetime-ts/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column t t timestamp not null"

41
localtests/tz-datetime/create.sql Normal file
View File

@ -0,0 +1,41 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
ts0 timestamp default current_timestamp,
ts1 datetime,
ts2 datetime,
updated tinyint unsigned default 0,
primary key(id),
key i_idx(i)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, 11, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 10 minute, updated = 1 where i = 11 order by id desc limit 1;
set session time_zone='system';
insert into gh_ost_test values (null, 13, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 10 minute, updated = 1 where i = 13 order by id desc limit 1;
set session time_zone='+00:00';
insert into gh_ost_test values (null, 17, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 10 minute, updated = 1 where i = 17 order by id desc limit 1;
set session time_zone='-03:00';
insert into gh_ost_test values (null, 19, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 10 minute, updated = 1 where i = 19 order by id desc limit 1;
set session time_zone='+05:00';
insert into gh_ost_test values (null, 23, null, now(), now(), 0);
update gh_ost_test set ts2=now() + interval 10 minute, updated = 1 where i = 23 order by id desc limit 1;
end ;;

24
localtests/unsigned-rename/create.sql Normal file
View File

@ -0,0 +1,24 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
bi bigint not null,
iu int unsigned not null,
biu bigint unsigned not null,
primary key(id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, -2147483647, -9223372036854775807, 4294967295, 18446744073709551615);
set @last_insert_id := cast(last_insert_id() as signed);
update gh_ost_test set i=-2147483647+@last_insert_id, bi=-9223372036854775807+@last_insert_id, iu=4294967295-@last_insert_id, biu=18446744073709551615-@last_insert_id where id < @last_insert_id order by id desc limit 1;
end ;;

1
localtests/unsigned-rename/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column iu iu_renamed int unsigned not null" --approve-renamed-columns

1
localtests/unsigned-rename/ghost_columns Normal file
View File

@ -0,0 +1 @@
id, i, bi, iu_renamed, biu

1
localtests/unsigned-rename/orig_columns Normal file
View File

@ -0,0 +1 @@
id, i, bi, iu, biu

24
localtests/unsigned-reorder/create.sql Normal file
View File

@ -0,0 +1,24 @@
drop table if exists gh_ost_test;
create table gh_ost_test (
id int auto_increment,
i int not null,
bi bigint not null,
iu int unsigned not null,
biu bigint unsigned not null,
primary key(id)
) auto_increment=1;
drop event if exists gh_ost_test;
delimiter ;;
create event gh_ost_test
on schedule every 1 second
starts current_timestamp
ends current_timestamp + interval 60 second
on completion not preserve
enable
do
begin
insert into gh_ost_test values (null, -2147483647, -9223372036854775807, 4294967295, 18446744073709551615);
set @last_insert_id := cast(last_insert_id() as signed);
update gh_ost_test set i=-2147483647+@last_insert_id, bi=-9223372036854775807+@last_insert_id, iu=4294967295-@last_insert_id, biu=18446744073709551615-@last_insert_id where id < @last_insert_id order by id desc limit 1;
end ;;

1
localtests/unsigned-reorder/extra_args Normal file
View File

@ -0,0 +1 @@
--alter="change column iu iu int unsigned not null after id" --approve-renamed-columns

1
localtests/unsigned-reorder/ghost_columns Normal file
View File

@ -0,0 +1 @@
id, i, bi, iu, biu

1
localtests/unsigned-reorder/orig_columns Normal file
View File

@ -0,0 +1 @@
id, i, bi, iu, biu

10
vendor/github.com/siddontang/go-mysql/replication/row_event.go generated vendored
View File

@ -591,7 +591,7 @@ func decodeBit(data []byte, nbits int, length int) (value int64, err error) {
return
}
func decodeTimestamp2(data []byte, dec uint16) (string, int, error) {
func decodeTimestamp2(data []byte, dec uint16) (interface{}, int, error) {
//get timestamp binary length
n := int(4 + (dec+1)/2)
sec := int64(binary.BigEndian.Uint32(data[0:4]))
@ -609,13 +609,13 @@ func decodeTimestamp2(data []byte, dec uint16) (string, int, error) {
return "0000-00-00 00:00:00", n, nil
}
t := time.Unix(sec, usec*1000).UTC() // .UTC() converted by shlomi-noach
return t.Format(TimeFormat), n, nil
t := time.Unix(sec, usec*1000)
return t, n, nil
}
const DATETIMEF_INT_OFS int64 = 0x8000000000
func decodeDatetime2(data []byte, dec uint16) (string, int, error) {
func decodeDatetime2(data []byte, dec uint16) (interface{}, int, error) {
//get datetime binary length
n := int(5 + (dec+1)/2)
@ -657,7 +657,7 @@ func decodeDatetime2(data []byte, dec uint16) (string, int, error) {
minute := int((hms >> 6) % (1 << 6))
hour := int((hms >> 12))
return fmt.Sprintf("%04d-%02d-%02d %02d:%02d:%02d", year, month, day, hour, minute, second), n, nil
return fmt.Sprintf("%04d-%02d-%02d %02d:%02d:%02d", year, month, day, hour, minute, second), n, nil // commented by Shlomi Noach. Yes I know about `git blame`
}
const TIMEF_OFS int64 = 0x800000000000

209
vendor/golang.org/x/text/encoding/charmap/charmap.go generated vendored Normal file
View File

@ -0,0 +1,209 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:generate go run maketables.go
// Package charmap provides simple character encodings such as IBM Code Page 437
// and Windows 1252.
package charmap // import "golang.org/x/text/encoding/charmap"
import (
"unicode/utf8"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// These encodings vary only in the way clients should interpret them. Their
// coded character set is identical and a single implementation can be shared.
var (
// ISO8859_6E is the ISO 8859-6E encoding.
ISO8859_6E encoding.Encoding = &iso8859_6E
// ISO8859_6I is the ISO 8859-6I encoding.
ISO8859_6I encoding.Encoding = &iso8859_6I
// ISO8859_8E is the ISO 8859-8E encoding.
ISO8859_8E encoding.Encoding = &iso8859_8E
// ISO8859_8I is the ISO 8859-8I encoding.
ISO8859_8I encoding.Encoding = &iso8859_8I
iso8859_6E = internal.Encoding{
ISO8859_6,
"ISO-8859-6E",
identifier.ISO88596E,
}
iso8859_6I = internal.Encoding{
ISO8859_6,
"ISO-8859-6I",
identifier.ISO88596I,
}
iso8859_8E = internal.Encoding{
ISO8859_8,
"ISO-8859-8E",
identifier.ISO88598E,
}
iso8859_8I = internal.Encoding{
ISO8859_8,
"ISO-8859-8I",
identifier.ISO88598I,
}
)
// All is a list of all defined encodings in this package.
var All = listAll
// TODO: implement these encodings, in order of importance.
// ASCII, ISO8859_1: Rather common. Close to Windows 1252.
// ISO8859_9: Close to Windows 1254.
// utf8Enc holds a rune's UTF-8 encoding in data[:len].
type utf8Enc struct {
len uint8
data [3]byte
}
// charmap describes an 8-bit character set encoding.
type charmap struct {
// name is the encoding's name.
name string
// mib is the encoding type of this encoder.
mib identifier.MIB
// asciiSuperset states whether the encoding is a superset of ASCII.
asciiSuperset bool
// low is the lower bound of the encoded byte for a non-ASCII rune. If
// charmap.asciiSuperset is true then this will be 0x80, otherwise 0x00.
low uint8
// replacement is the encoded replacement character.
replacement byte
// decode is the map from encoded byte to UTF-8.
decode [256]utf8Enc
// encoding is the map from runes to encoded bytes. Each entry is a
// uint32: the high 8 bits are the encoded byte and the low 24 bits are
// the rune. The table entries are sorted by ascending rune.
encode [256]uint32
}
func (m *charmap) NewDecoder() *encoding.Decoder {
return &encoding.Decoder{Transformer: charmapDecoder{charmap: m}}
}
func (m *charmap) NewEncoder() *encoding.Encoder {
return &encoding.Encoder{Transformer: charmapEncoder{charmap: m}}
}
func (m *charmap) String() string {
return m.name
}
func (m *charmap) ID() (mib identifier.MIB, other string) {
return m.mib, ""
}
// charmapDecoder implements transform.Transformer by decoding to UTF-8.
type charmapDecoder struct {
transform.NopResetter
charmap *charmap
}
func (m charmapDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
for i, c := range src {
if m.charmap.asciiSuperset && c < utf8.RuneSelf {
if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = c
nDst++
nSrc = i + 1
continue
}
decode := &m.charmap.decode[c]
n := int(decode.len)
if nDst+n > len(dst) {
err = transform.ErrShortDst
break
}
// It's 15% faster to avoid calling copy for these tiny slices.
for j := 0; j < n; j++ {
dst[nDst] = decode.data[j]
nDst++
}
nSrc = i + 1
}
return nDst, nSrc, err
}
// charmapEncoder implements transform.Transformer by encoding from UTF-8.
type charmapEncoder struct {
transform.NopResetter
charmap *charmap
}
func (m charmapEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
loop:
for nSrc < len(src) {
if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
r = rune(src[nSrc])
// Decode a 1-byte rune.
if r < utf8.RuneSelf {
if m.charmap.asciiSuperset {
nSrc++
dst[nDst] = uint8(r)
nDst++
continue
}
size = 1
} else {
// Decode a multi-byte rune.
r, size = utf8.DecodeRune(src[nSrc:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
if !atEOF && !utf8.FullRune(src[nSrc:]) {
err = transform.ErrShortSrc
} else {
err = internal.RepertoireError(m.charmap.replacement)
}
break
}
}
// Binary search in [low, high) for that rune in the m.charmap.encode table.
for low, high := int(m.charmap.low), 0x100; ; {
if low >= high {
err = internal.RepertoireError(m.charmap.replacement)
break loop
}
mid := (low + high) / 2
got := m.charmap.encode[mid]
gotRune := rune(got & (1<<24 - 1))
if gotRune < r {
low = mid + 1
} else if gotRune > r {
high = mid
} else {
dst[nDst] = byte(got >> 24)
nDst++
break
}
}
nSrc += size
}
return nDst, nSrc, err
}

45
vendor/golang.org/x/text/encoding/charmap/charmap_test.go generated vendored Normal file
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package charmap
import (
"testing"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/transform"
)
func dec(e encoding.Encoding) (dir string, t transform.Transformer, err error) {
return "Decode", e.NewDecoder(), nil
}
func enc(e encoding.Encoding) (dir string, t transform.Transformer, err error) {
return "Encode", e.NewEncoder(), internal.ErrASCIIReplacement
}
func TestNonRepertoire(t *testing.T) {
testCases := []struct {
init func(e encoding.Encoding) (string, transform.Transformer, error)
e encoding.Encoding
src, want string
}{
{dec, Windows1252, "\x81", "\ufffd"},
{enc, Windows1252, "갂", ""},
{enc, Windows1252, "a갂", "a"},
{enc, Windows1252, "\u00E9갂", "\xE9"},
}
for _, tc := range testCases {
dir, tr, wantErr := tc.init(tc.e)
dst, _, err := transform.String(tr, tc.src)
if err != wantErr {
t.Errorf("%s %v(%q): got %v; want %v", dir, tc.e, tc.src, err, wantErr)
}
if got := string(dst); got != tc.want {
t.Errorf("%s %v(%q):\ngot %q\nwant %q", dir, tc.e, tc.src, got, tc.want)
}
}
}

524
vendor/golang.org/x/text/encoding/charmap/maketables.go generated vendored Normal file
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@ -0,0 +1,524 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
package main
import (
"bufio"
"fmt"
"log"
"net/http"
"sort"
"strings"
"unicode/utf8"
"golang.org/x/text/encoding"
"golang.org/x/text/internal/gen"
)
const ascii = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f" +
"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
` !"#$%&'()*+,-./0123456789:;<=>?` +
`@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_` +
"`abcdefghijklmnopqrstuvwxyz{|}~\u007f"
var encodings = []struct {
name string
mib string
comment string
varName string
replacement byte
mapping string
}{
{
"IBM Code Page 437",
"PC8CodePage437",
"",
"CodePage437",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM437-2.1.2.ucm",
},
{
"IBM Code Page 850",
"PC850Multilingual",
"",
"CodePage850",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM850-2.1.2.ucm",
},
{
"IBM Code Page 852",
"PCp852",
"",
"CodePage852",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM852-2.1.2.ucm",
},
{
"IBM Code Page 855",
"IBM855",
"",
"CodePage855",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM855-2.1.2.ucm",
},
{
"Windows Code Page 858", // PC latin1 with Euro
"IBM00858",
"",
"CodePage858",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-858-2000.ucm",
},
{
"IBM Code Page 860",
"IBM860",
"",
"CodePage860",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM860-2.1.2.ucm",
},
{
"IBM Code Page 862",
"PC862LatinHebrew",
"",
"CodePage862",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM862-2.1.2.ucm",
},
{
"IBM Code Page 863",
"IBM863",
"",
"CodePage863",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM863-2.1.2.ucm",
},
{
"IBM Code Page 865",
"IBM865",
"",
"CodePage865",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM865-2.1.2.ucm",
},
{
"IBM Code Page 866",
"IBM866",
"",
"CodePage866",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-ibm866.txt",
},
{
"ISO 8859-1",
"ISOLatin1",
"",
"ISO8859_1",
encoding.ASCIISub,
"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_1-1998.ucm",
},
{
"ISO 8859-2",
"ISOLatin2",
"",
"ISO8859_2",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-2.txt",
},
{
"ISO 8859-3",
"ISOLatin3",
"",
"ISO8859_3",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-3.txt",
},
{
"ISO 8859-4",
"ISOLatin4",
"",
"ISO8859_4",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-4.txt",
},
{
"ISO 8859-5",
"ISOLatinCyrillic",
"",
"ISO8859_5",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-5.txt",
},
{
"ISO 8859-6",
"ISOLatinArabic",
"",
"ISO8859_6,ISO8859_6E,ISO8859_6I",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-6.txt",
},
{
"ISO 8859-7",
"ISOLatinGreek",
"",
"ISO8859_7",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-7.txt",
},
{
"ISO 8859-8",
"ISOLatinHebrew",
"",
"ISO8859_8,ISO8859_8E,ISO8859_8I",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-8.txt",
},
{
"ISO 8859-10",
"ISOLatin6",
"",
"ISO8859_10",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-10.txt",
},
{
"ISO 8859-13",
"ISO885913",
"",
"ISO8859_13",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-13.txt",
},
{
"ISO 8859-14",
"ISO885914",
"",
"ISO8859_14",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-14.txt",
},
{
"ISO 8859-15",
"ISO885915",
"",
"ISO8859_15",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-15.txt",
},
{
"ISO 8859-16",
"ISO885916",
"",
"ISO8859_16",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-iso-8859-16.txt",
},
{
"KOI8-R",
"KOI8R",
"",
"KOI8R",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-koi8-r.txt",
},
{
"KOI8-U",
"KOI8U",
"",
"KOI8U",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-koi8-u.txt",
},
{
"Macintosh",
"Macintosh",
"",
"Macintosh",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-macintosh.txt",
},
{
"Macintosh Cyrillic",
"MacintoshCyrillic",
"",
"MacintoshCyrillic",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-x-mac-cyrillic.txt",
},
{
"Windows 874",
"Windows874",
"",
"Windows874",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-874.txt",
},
{
"Windows 1250",
"Windows1250",
"",
"Windows1250",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1250.txt",
},
{
"Windows 1251",
"Windows1251",
"",
"Windows1251",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1251.txt",
},
{
"Windows 1252",
"Windows1252",
"",
"Windows1252",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1252.txt",
},
{
"Windows 1253",
"Windows1253",
"",
"Windows1253",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1253.txt",
},
{
"Windows 1254",
"Windows1254",
"",
"Windows1254",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1254.txt",
},
{
"Windows 1255",
"Windows1255",
"",
"Windows1255",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1255.txt",
},
{
"Windows 1256",
"Windows1256",
"",
"Windows1256",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1256.txt",
},
{
"Windows 1257",
"Windows1257",
"",
"Windows1257",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1257.txt",
},
{
"Windows 1258",
"Windows1258",
"",
"Windows1258",
encoding.ASCIISub,
"http://encoding.spec.whatwg.org/index-windows-1258.txt",
},
{
"X-User-Defined",
"XUserDefined",
"It is defined at http://encoding.spec.whatwg.org/#x-user-defined",
"XUserDefined",
encoding.ASCIISub,
ascii +
"\uf780\uf781\uf782\uf783\uf784\uf785\uf786\uf787" +
"\uf788\uf789\uf78a\uf78b\uf78c\uf78d\uf78e\uf78f" +
"\uf790\uf791\uf792\uf793\uf794\uf795\uf796\uf797" +
"\uf798\uf799\uf79a\uf79b\uf79c\uf79d\uf79e\uf79f" +
"\uf7a0\uf7a1\uf7a2\uf7a3\uf7a4\uf7a5\uf7a6\uf7a7" +
"\uf7a8\uf7a9\uf7aa\uf7ab\uf7ac\uf7ad\uf7ae\uf7af" +
"\uf7b0\uf7b1\uf7b2\uf7b3\uf7b4\uf7b5\uf7b6\uf7b7" +
"\uf7b8\uf7b9\uf7ba\uf7bb\uf7bc\uf7bd\uf7be\uf7bf" +
"\uf7c0\uf7c1\uf7c2\uf7c3\uf7c4\uf7c5\uf7c6\uf7c7" +
"\uf7c8\uf7c9\uf7ca\uf7cb\uf7cc\uf7cd\uf7ce\uf7cf" +
"\uf7d0\uf7d1\uf7d2\uf7d3\uf7d4\uf7d5\uf7d6\uf7d7" +
"\uf7d8\uf7d9\uf7da\uf7db\uf7dc\uf7dd\uf7de\uf7df" +
"\uf7e0\uf7e1\uf7e2\uf7e3\uf7e4\uf7e5\uf7e6\uf7e7" +
"\uf7e8\uf7e9\uf7ea\uf7eb\uf7ec\uf7ed\uf7ee\uf7ef" +
"\uf7f0\uf7f1\uf7f2\uf7f3\uf7f4\uf7f5\uf7f6\uf7f7" +
"\uf7f8\uf7f9\uf7fa\uf7fb\uf7fc\uf7fd\uf7fe\uf7ff",
},
}
func getWHATWG(url string) string {
res, err := http.Get(url)
if err != nil {
log.Fatalf("%q: Get: %v", url, err)
}
defer res.Body.Close()
mapping := make([]rune, 128)
for i := range mapping {
mapping[i] = '\ufffd'
}
scanner := bufio.NewScanner(res.Body)
for scanner.Scan() {
s := strings.TrimSpace(scanner.Text())
if s == "" || s[0] == '#' {
continue
}
x, y := 0, 0
if _, err := fmt.Sscanf(s, "%d\t0x%x", &x, &y); err != nil {
log.Fatalf("could not parse %q", s)
}
if x < 0 || 128 <= x {
log.Fatalf("code %d is out of range", x)
}
if 0x80 <= y && y < 0xa0 {
// We diverge from the WHATWG spec by mapping control characters
// in the range [0x80, 0xa0) to U+FFFD.
continue
}
mapping[x] = rune(y)
}
return ascii + string(mapping)
}
func getUCM(url string) string {
res, err := http.Get(url)
if err != nil {
log.Fatalf("%q: Get: %v", url, err)
}
defer res.Body.Close()
mapping := make([]rune, 256)
for i := range mapping {
mapping[i] = '\ufffd'
}
charsFound := 0
scanner := bufio.NewScanner(res.Body)
for scanner.Scan() {
s := strings.TrimSpace(scanner.Text())
if s == "" || s[0] == '#' {
continue
}
var c byte
var r rune
if _, err := fmt.Sscanf(s, `<U%x> \x%x |0`, &r, &c); err != nil {
continue
}
mapping[c] = r
charsFound++
}
if charsFound < 200 {
log.Fatalf("%q: only %d characters found (wrong page format?)", url, charsFound)
}
return string(mapping)
}
func main() {
mibs := map[string]bool{}
all := []string{}
w := gen.NewCodeWriter()
defer w.WriteGoFile("tables.go", "charmap")
printf := func(s string, a ...interface{}) { fmt.Fprintf(w, s, a...) }
printf("import (\n")
printf("\t\"golang.org/x/text/encoding\"\n")
printf("\t\"golang.org/x/text/encoding/internal/identifier\"\n")
printf(")\n\n")
for _, e := range encodings {
varNames := strings.Split(e.varName, ",")
all = append(all, varNames...)
varName := varNames[0]
switch {
case strings.HasPrefix(e.mapping, "http://encoding.spec.whatwg.org/"):
e.mapping = getWHATWG(e.mapping)
case strings.HasPrefix(e.mapping, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/"):
e.mapping = getUCM(e.mapping)
}
asciiSuperset, low := strings.HasPrefix(e.mapping, ascii), 0x00
if asciiSuperset {
low = 0x80
}
lvn := 1
if strings.HasPrefix(varName, "ISO") || strings.HasPrefix(varName, "KOI") {
lvn = 3
}
lowerVarName := strings.ToLower(varName[:lvn]) + varName[lvn:]
printf("// %s is the %s encoding.\n", varName, e.name)
if e.comment != "" {
printf("//\n// %s\n", e.comment)
}
printf("var %s encoding.Encoding = &%s\n\nvar %s = charmap{\nname: %q,\n",
varName, lowerVarName, lowerVarName, e.name)
if mibs[e.mib] {
log.Fatalf("MIB type %q declared multiple times.", e.mib)
}
printf("mib: identifier.%s,\n", e.mib)
printf("asciiSuperset: %t,\n", asciiSuperset)
printf("low: 0x%02x,\n", low)
printf("replacement: 0x%02x,\n", e.replacement)
printf("decode: [256]utf8Enc{\n")
i, backMapping := 0, map[rune]byte{}
for _, c := range e.mapping {
if _, ok := backMapping[c]; !ok && c != utf8.RuneError {
backMapping[c] = byte(i)
}
var buf [8]byte
n := utf8.EncodeRune(buf[:], c)
if n > 3 {
panic(fmt.Sprintf("rune %q (%U) is too long", c, c))
}
printf("{%d,[3]byte{0x%02x,0x%02x,0x%02x}},", n, buf[0], buf[1], buf[2])
if i%2 == 1 {
printf("\n")
}
i++
}
printf("},\n")
printf("encode: [256]uint32{\n")
encode := make([]uint32, 0, 256)
for c, i := range backMapping {
encode = append(encode, uint32(i)<<24|uint32(c))
}
sort.Sort(byRune(encode))
for len(encode) < cap(encode) {
encode = append(encode, encode[len(encode)-1])
}
for i, enc := range encode {
printf("0x%08x,", enc)
if i%8 == 7 {
printf("\n")
}
}
printf("},\n}\n")
// Add an estimate of the size of a single charmap{} struct value, which
// includes two 256 elem arrays of 4 bytes and some extra fields, which
// align to 3 uint64s on 64-bit architectures.
w.Size += 2*4*256 + 3*8
}
// TODO: add proper line breaking.
printf("var listAll = []encoding.Encoding{\n%s,\n}\n\n", strings.Join(all, ",\n"))
}
type byRune []uint32
func (b byRune) Len() int { return len(b) }
func (b byRune) Less(i, j int) bool { return b[i]&0xffffff < b[j]&0xffffff }
func (b byRune) Swap(i, j int) { b[i], b[j] = b[j], b[i] }

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package encoding defines an interface for character encodings, such as Shift
// JIS and Windows 1252, that can convert to and from UTF-8.
//
// Encoding implementations are provided in other packages, such as
// golang.org/x/text/encoding/charmap and
// golang.org/x/text/encoding/japanese.
package encoding // import "golang.org/x/text/encoding"
import (
"errors"
"io"
"strconv"
"unicode/utf8"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// TODO:
// - There seems to be some inconsistency in when decoders return errors
// and when not. Also documentation seems to suggest they shouldn't return
// errors at all (except for UTF-16).
// - Encoders seem to rely on or at least benefit from the input being in NFC
// normal form. Perhaps add an example how users could prepare their output.
// Encoding is a character set encoding that can be transformed to and from
// UTF-8.
type Encoding interface {
// NewDecoder returns a Decoder.
NewDecoder() *Decoder
// NewEncoder returns an Encoder.
NewEncoder() *Encoder
}
// A Decoder converts bytes to UTF-8. It implements transform.Transformer.
//
// Transforming source bytes that are not of that encoding will not result in an
// error per se. Each byte that cannot be transcoded will be represented in the
// output by the UTF-8 encoding of '\uFFFD', the replacement rune.
type Decoder struct {
transform.Transformer
// This forces external creators of Decoders to use names in struct
// initializers, allowing for future extendibility without having to break
// code.
_ struct{}
}
// Bytes converts the given encoded bytes to UTF-8. It returns the converted
// bytes or nil, err if any error occurred.
func (d *Decoder) Bytes(b []byte) ([]byte, error) {
b, _, err := transform.Bytes(d, b)
if err != nil {
return nil, err
}
return b, nil
}
// String converts the given encoded string to UTF-8. It returns the converted
// string or "", err if any error occurred.
func (d *Decoder) String(s string) (string, error) {
s, _, err := transform.String(d, s)
if err != nil {
return "", err
}
return s, nil
}
// Reader wraps another Reader to decode its bytes.
//
// The Decoder may not be used for any other operation as long as the returned
// Reader is in use.
func (d *Decoder) Reader(r io.Reader) io.Reader {
return transform.NewReader(r, d)
}
// An Encoder converts bytes from UTF-8. It implements transform.Transformer.
//
// Each rune that cannot be transcoded will result in an error. In this case,
// the transform will consume all source byte up to, not including the offending
// rune. Transforming source bytes that are not valid UTF-8 will be replaced by
// `\uFFFD`. To return early with an error instead, use transform.Chain to
// preprocess the data with a UTF8Validator.
type Encoder struct {
transform.Transformer
// This forces external creators of Encoders to use names in struct
// initializers, allowing for future extendibility without having to break
// code.
_ struct{}
}
// Bytes converts bytes from UTF-8. It returns the converted bytes or nil, err if
// any error occurred.
func (e *Encoder) Bytes(b []byte) ([]byte, error) {
b, _, err := transform.Bytes(e, b)
if err != nil {
return nil, err
}
return b, nil
}
// String converts a string from UTF-8. It returns the converted string or
// "", err if any error occurred.
func (e *Encoder) String(s string) (string, error) {
s, _, err := transform.String(e, s)
if err != nil {
return "", err
}
return s, nil
}
// Writer wraps another Writer to encode its UTF-8 output.
//
// The Encoder may not be used for any other operation as long as the returned
// Writer is in use.
func (e *Encoder) Writer(w io.Writer) io.Writer {
return transform.NewWriter(w, e)
}
// ASCIISub is the ASCII substitute character, as recommended by
// http://unicode.org/reports/tr36/#Text_Comparison
const ASCIISub = '\x1a'
// Nop is the nop encoding. Its transformed bytes are the same as the source
// bytes; it does not replace invalid UTF-8 sequences.
var Nop Encoding = nop{}
type nop struct{}
func (nop) NewDecoder() *Decoder {
return &Decoder{Transformer: transform.Nop}
}
func (nop) NewEncoder() *Encoder {
return &Encoder{Transformer: transform.Nop}
}
// Replacement is the replacement encoding. Decoding from the replacement
// encoding yields a single '\uFFFD' replacement rune. Encoding from UTF-8 to
// the replacement encoding yields the same as the source bytes except that
// invalid UTF-8 is converted to '\uFFFD'.
//
// It is defined at http://encoding.spec.whatwg.org/#replacement
var Replacement Encoding = replacement{}
type replacement struct{}
func (replacement) NewDecoder() *Decoder {
return &Decoder{Transformer: replacementDecoder{}}
}
func (replacement) NewEncoder() *Encoder {
return &Encoder{Transformer: replacementEncoder{}}
}
func (replacement) ID() (mib identifier.MIB, other string) {
return identifier.Replacement, ""
}
type replacementDecoder struct{ transform.NopResetter }
func (replacementDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
if len(dst) < 3 {
return 0, 0, transform.ErrShortDst
}
if atEOF {
const fffd = "\ufffd"
dst[0] = fffd[0]
dst[1] = fffd[1]
dst[2] = fffd[2]
nDst = 3
}
return nDst, len(src), nil
}
type replacementEncoder struct{ transform.NopResetter }
func (replacementEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
for ; nSrc < len(src); nSrc += size {
r = rune(src[nSrc])
// Decode a 1-byte rune.
if r < utf8.RuneSelf {
size = 1
} else {
// Decode a multi-byte rune.
r, size = utf8.DecodeRune(src[nSrc:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
if !atEOF && !utf8.FullRune(src[nSrc:]) {
err = transform.ErrShortSrc
break
}
r = '\ufffd'
}
}
if nDst+utf8.RuneLen(r) > len(dst) {
err = transform.ErrShortDst
break
}
nDst += utf8.EncodeRune(dst[nDst:], r)
}
return nDst, nSrc, err
}
// HTMLEscapeUnsupported wraps encoders to replace source runes outside the
// repertoire of the destination encoding with HTML escape sequences.
//
// This wrapper exists to comply to URL and HTML forms requiring a
// non-terminating legacy encoder. The produced sequences may lead to data
// loss as they are indistinguishable from legitimate input. To avoid this
// issue, use UTF-8 encodings whenever possible.
func HTMLEscapeUnsupported(e *Encoder) *Encoder {
return &Encoder{Transformer: &errorHandler{e, errorToHTML}}
}
// ReplaceUnsupported wraps encoders to replace source runes outside the
// repertoire of the destination encoding with an encoding-specific
// replacement.
//
// This wrapper is only provided for backwards compatibility and legacy
// handling. Its use is strongly discouraged. Use UTF-8 whenever possible.
func ReplaceUnsupported(e *Encoder) *Encoder {
return &Encoder{Transformer: &errorHandler{e, errorToReplacement}}
}
type errorHandler struct {
*Encoder
handler func(dst []byte, r rune, err repertoireError) (n int, ok bool)
}
// TODO: consider making this error public in some form.
type repertoireError interface {
Replacement() byte
}
func (h errorHandler) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
nDst, nSrc, err = h.Transformer.Transform(dst, src, atEOF)
for err != nil {
rerr, ok := err.(repertoireError)
if !ok {
return nDst, nSrc, err
}
r, sz := utf8.DecodeRune(src[nSrc:])
n, ok := h.handler(dst[nDst:], r, rerr)
if !ok {
return nDst, nSrc, transform.ErrShortDst
}
err = nil
nDst += n
if nSrc += sz; nSrc < len(src) {
var dn, sn int
dn, sn, err = h.Transformer.Transform(dst[nDst:], src[nSrc:], atEOF)
nDst += dn
nSrc += sn
}
}
return nDst, nSrc, err
}
func errorToHTML(dst []byte, r rune, err repertoireError) (n int, ok bool) {
buf := [8]byte{}
b := strconv.AppendUint(buf[:0], uint64(r), 10)
if n = len(b) + len("&#;"); n >= len(dst) {
return 0, false
}
dst[0] = '&'
dst[1] = '#'
dst[copy(dst[2:], b)+2] = ';'
return n, true
}
func errorToReplacement(dst []byte, r rune, err repertoireError) (n int, ok bool) {
if len(dst) == 0 {
return 0, false
}
dst[0] = err.Replacement()
return 1, true
}
// ErrInvalidUTF8 means that a transformer encountered invalid UTF-8.
var ErrInvalidUTF8 = errors.New("encoding: invalid UTF-8")
// UTF8Validator is a transformer that returns ErrInvalidUTF8 on the first
// input byte that is not valid UTF-8.
var UTF8Validator transform.Transformer = utf8Validator{}
type utf8Validator struct{ transform.NopResetter }
func (utf8Validator) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
n := len(src)
if n > len(dst) {
n = len(dst)
}
for i := 0; i < n; {
if c := src[i]; c < utf8.RuneSelf {
dst[i] = c
i++
continue
}
_, size := utf8.DecodeRune(src[i:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
err = ErrInvalidUTF8
if !atEOF && !utf8.FullRune(src[i:]) {
err = transform.ErrShortSrc
}
return i, i, err
}
if i+size > len(dst) {
return i, i, transform.ErrShortDst
}
for ; size > 0; size-- {
dst[i] = src[i]
i++
}
}
if len(src) > len(dst) {
err = transform.ErrShortDst
}
return n, n, err
}

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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package encoding_test
import (
"fmt"
"io"
"os"
"strings"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/charmap"
"golang.org/x/text/encoding/unicode"
"golang.org/x/text/transform"
)
func ExampleDecodeWindows1252() {
sr := strings.NewReader("Gar\xe7on !")
tr := charmap.Windows1252.NewDecoder().Reader(sr)
io.Copy(os.Stdout, tr)
// Output: Garçon !
}
func ExampleUTF8Validator() {
for i := 0; i < 2; i++ {
var transformer transform.Transformer
transformer = unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM).NewEncoder()
if i == 1 {
transformer = transform.Chain(encoding.UTF8Validator, transformer)
}
dst := make([]byte, 256)
src := []byte("abc\xffxyz") // src is invalid UTF-8.
nDst, nSrc, err := transformer.Transform(dst, src, true)
fmt.Printf("i=%d: produced %q, consumed %q, error %v\n",
i, dst[:nDst], src[:nSrc], err)
}
// Output:
// i=0: produced "\x00a\x00b\x00c\xff\xfd\x00x\x00y\x00z", consumed "abc\xffxyz", error <nil>
// i=1: produced "\x00a\x00b\x00c", consumed "abc", error encoding: invalid UTF-8
}

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vendor/golang.org/x/text/encoding/htmlindex/gen.go generated vendored Normal file
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
package main
import (
"bytes"
"encoding/json"
"fmt"
"log"
"strings"
"golang.org/x/text/internal/gen"
)
type group struct {
Encodings []struct {
Labels []string
Name string
}
}
func main() {
gen.Init()
r := gen.Open("http://www.w3.org/TR", "w3", "encoding/indexes/encodings.json")
var groups []group
if err := json.NewDecoder(r).Decode(&groups); err != nil {
log.Fatalf("Error reading encodings.json: %v", err)
}
w := &bytes.Buffer{}
fmt.Fprintln(w, "type htmlEncoding byte")
fmt.Fprintln(w, "const (")
for i, g := range groups {
for _, e := range g.Encodings {
name := consts[e.Name]
if name == "" {
log.Fatalf("No const defined for %s.", e.Name)
}
if i == 0 {
fmt.Fprintf(w, "%s htmlEncoding = iota\n", name)
} else {
fmt.Fprintf(w, "%s\n", name)
}
}
}
fmt.Fprintln(w, "numEncodings")
fmt.Fprint(w, ")\n\n")
fmt.Fprintln(w, "var canonical = [numEncodings]string{")
for _, g := range groups {
for _, e := range g.Encodings {
fmt.Fprintf(w, "%q,\n", e.Name)
}
}
fmt.Fprint(w, "}\n\n")
fmt.Fprintln(w, "var nameMap = map[string]htmlEncoding{")
for _, g := range groups {
for _, e := range g.Encodings {
for _, l := range e.Labels {
fmt.Fprintf(w, "%q: %s,\n", l, consts[e.Name])
}
}
}
fmt.Fprint(w, "}\n\n")
var tags []string
fmt.Fprintln(w, "var localeMap = []htmlEncoding{")
for _, loc := range locales {
tags = append(tags, loc.tag)
fmt.Fprintf(w, "%s, // %s \n", consts[loc.name], loc.tag)
}
fmt.Fprint(w, "}\n\n")
fmt.Fprintf(w, "const locales = %q\n", strings.Join(tags, " "))
gen.WriteGoFile("tables.go", "htmlindex", w.Bytes())
}
// consts maps canonical encoding name to internal constant.
var consts = map[string]string{
"utf-8": "utf8",
"ibm866": "ibm866",
"iso-8859-2": "iso8859_2",
"iso-8859-3": "iso8859_3",
"iso-8859-4": "iso8859_4",
"iso-8859-5": "iso8859_5",
"iso-8859-6": "iso8859_6",
"iso-8859-7": "iso8859_7",
"iso-8859-8": "iso8859_8",
"iso-8859-8-i": "iso8859_8I",
"iso-8859-10": "iso8859_10",
"iso-8859-13": "iso8859_13",
"iso-8859-14": "iso8859_14",
"iso-8859-15": "iso8859_15",
"iso-8859-16": "iso8859_16",
"koi8-r": "koi8r",
"koi8-u": "koi8u",
"macintosh": "macintosh",
"windows-874": "windows874",
"windows-1250": "windows1250",
"windows-1251": "windows1251",
"windows-1252": "windows1252",
"windows-1253": "windows1253",
"windows-1254": "windows1254",
"windows-1255": "windows1255",
"windows-1256": "windows1256",
"windows-1257": "windows1257",
"windows-1258": "windows1258",
"x-mac-cyrillic": "macintoshCyrillic",
"gbk": "gbk",
"gb18030": "gb18030",
// "hz-gb-2312": "hzgb2312", // Was removed from WhatWG
"big5": "big5",
"euc-jp": "eucjp",
"iso-2022-jp": "iso2022jp",
"shift_jis": "shiftJIS",
"euc-kr": "euckr",
"replacement": "replacement",
"utf-16be": "utf16be",
"utf-16le": "utf16le",
"x-user-defined": "xUserDefined",
}
// locales is taken from
// https://html.spec.whatwg.org/multipage/syntax.html#encoding-sniffing-algorithm.
var locales = []struct{ tag, name string }{
{"und", "windows-1252"}, // The default value.
{"ar", "windows-1256"},
{"ba", "windows-1251"},
{"be", "windows-1251"},
{"bg", "windows-1251"},
{"cs", "windows-1250"},
{"el", "iso-8859-7"},
{"et", "windows-1257"},
{"fa", "windows-1256"},
{"he", "windows-1255"},
{"hr", "windows-1250"},
{"hu", "iso-8859-2"},
{"ja", "shift_jis"},
{"kk", "windows-1251"},
{"ko", "euc-kr"},
{"ku", "windows-1254"},
{"ky", "windows-1251"},
{"lt", "windows-1257"},
{"lv", "windows-1257"},
{"mk", "windows-1251"},
{"pl", "iso-8859-2"},
{"ru", "windows-1251"},
{"sah", "windows-1251"},
{"sk", "windows-1250"},
{"sl", "iso-8859-2"},
{"sr", "windows-1251"},
{"tg", "windows-1251"},
{"th", "windows-874"},
{"tr", "windows-1254"},
{"tt", "windows-1251"},
{"uk", "windows-1251"},
{"vi", "windows-1258"},
{"zh-hans", "gb18030"},
{"zh-hant", "big5"},
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:generate go run gen.go
// Package htmlindex maps character set encoding names to Encodings as
// recommended by the W3C for use in HTML 5. See http://www.w3.org/TR/encoding.
package htmlindex
// TODO: perhaps have a "bare" version of the index (used by this package) that
// is not pre-loaded with all encodings. Global variables in encodings prevent
// the linker from being able to purge unneeded tables. This means that
// referencing all encodings, as this package does for the default index, links
// in all encodings unconditionally.
//
// This issue can be solved by either solving the linking issue (see
// https://github.com/golang/go/issues/6330) or refactoring the encoding tables
// (e.g. moving the tables to internal packages that do not use global
// variables).
// TODO: allow canonicalizing names
import (
"errors"
"strings"
"sync"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/language"
)
var (
errInvalidName = errors.New("htmlindex: invalid encoding name")
errUnknown = errors.New("htmlindex: unknown Encoding")
errUnsupported = errors.New("htmlindex: this encoding is not supported")
)
var (
matcherOnce sync.Once
matcher language.Matcher
)
// LanguageDefault returns the canonical name of the default encoding for a
// given language.
func LanguageDefault(tag language.Tag) string {
matcherOnce.Do(func() {
tags := []language.Tag{}
for _, t := range strings.Split(locales, " ") {
tags = append(tags, language.MustParse(t))
}
matcher = language.NewMatcher(tags)
})
_, i, _ := matcher.Match(tag)
return canonical[localeMap[i]] // Default is Windows-1252.
}
// Get returns an Encoding for one of the names listed in
// http://www.w3.org/TR/encoding using the Default Index. Matching is case-
// insensitive.
func Get(name string) (encoding.Encoding, error) {
x, ok := nameMap[strings.ToLower(strings.TrimSpace(name))]
if !ok {
return nil, errInvalidName
}
return encodings[x], nil
}
// Name reports the canonical name of the given Encoding. It will return
// an error if e is not associated with a supported encoding scheme.
func Name(e encoding.Encoding) (string, error) {
id, ok := e.(identifier.Interface)
if !ok {
return "", errUnknown
}
mib, _ := id.ID()
if mib == 0 {
return "", errUnknown
}
v, ok := mibMap[mib]
if !ok {
return "", errUnsupported
}
return canonical[v], nil
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package htmlindex
import (
"testing"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/charmap"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/encoding/unicode"
"golang.org/x/text/language"
)
func TestGet(t *testing.T) {
for i, tc := range []struct {
name string
canonical string
err error
}{
{"utf-8", "utf-8", nil},
{" utf-8 ", "utf-8", nil},
{" l5 ", "windows-1254", nil},
{"latin5 ", "windows-1254", nil},
{"latin 5", "", errInvalidName},
{"latin-5", "", errInvalidName},
} {
enc, err := Get(tc.name)
if err != tc.err {
t.Errorf("%d: error was %v; want %v", i, err, tc.err)
}
if err != nil {
continue
}
if got, err := Name(enc); got != tc.canonical {
t.Errorf("%d: Name(Get(%q)) = %q; want %q (%v)", i, tc.name, got, tc.canonical, err)
}
}
}
func TestTables(t *testing.T) {
for name, index := range nameMap {
got, err := Get(name)
if err != nil {
t.Errorf("%s:err: expected non-nil error", name)
}
if want := encodings[index]; got != want {
t.Errorf("%s:encoding: got %v; want %v", name, got, want)
}
mib, _ := got.(identifier.Interface).ID()
if mibMap[mib] != index {
t.Errorf("%s:mibMab: got %d; want %d", name, mibMap[mib], index)
}
}
}
func TestName(t *testing.T) {
for i, tc := range []struct {
desc string
enc encoding.Encoding
name string
err error
}{{
"defined encoding",
charmap.ISO8859_2,
"iso-8859-2",
nil,
}, {
"defined Unicode encoding",
unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM),
"utf-16be",
nil,
}, {
"undefined Unicode encoding in HTML standard",
unicode.UTF16(unicode.BigEndian, unicode.UseBOM),
"",
errUnsupported,
}, {
"undefined other encoding in HTML standard",
charmap.CodePage437,
"",
errUnsupported,
}, {
"unknown encoding",
encoding.Nop,
"",
errUnknown,
}} {
name, err := Name(tc.enc)
if name != tc.name || err != tc.err {
t.Errorf("%d:%s: got %q, %v; want %q, %v", i, tc.desc, name, err, tc.name, tc.err)
}
}
}
func TestLanguageDefault(t *testing.T) {
for _, tc := range []struct{ tag, want string }{
{"und", "windows-1252"}, // The default value.
{"ar", "windows-1256"},
{"ba", "windows-1251"},
{"be", "windows-1251"},
{"bg", "windows-1251"},
{"cs", "windows-1250"},
{"el", "iso-8859-7"},
{"et", "windows-1257"},
{"fa", "windows-1256"},
{"he", "windows-1255"},
{"hr", "windows-1250"},
{"hu", "iso-8859-2"},
{"ja", "shift_jis"},
{"kk", "windows-1251"},
{"ko", "euc-kr"},
{"ku", "windows-1254"},
{"ky", "windows-1251"},
{"lt", "windows-1257"},
{"lv", "windows-1257"},
{"mk", "windows-1251"},
{"pl", "iso-8859-2"},
{"ru", "windows-1251"},
{"sah", "windows-1251"},
{"sk", "windows-1250"},
{"sl", "iso-8859-2"},
{"sr", "windows-1251"},
{"tg", "windows-1251"},
{"th", "windows-874"},
{"tr", "windows-1254"},
{"tt", "windows-1251"},
{"uk", "windows-1251"},
{"vi", "windows-1258"},
{"zh-hans", "gb18030"},
{"zh-hant", "big5"},
// Variants and close approximates of the above.
{"ar_EG", "windows-1256"},
{"bs", "windows-1250"}, // Bosnian Latin maps to Croatian.
// Use default fallback in case of miss.
{"nl", "windows-1252"},
} {
if got := LanguageDefault(language.MustParse(tc.tag)); got != tc.want {
t.Errorf("LanguageDefault(%s) = %s; want %s", tc.tag, got, tc.want)
}
}
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package htmlindex
import (
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/charmap"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/encoding/japanese"
"golang.org/x/text/encoding/korean"
"golang.org/x/text/encoding/simplifiedchinese"
"golang.org/x/text/encoding/traditionalchinese"
"golang.org/x/text/encoding/unicode"
)
// mibMap maps a MIB identifier to an htmlEncoding index.
var mibMap = map[identifier.MIB]htmlEncoding{
identifier.UTF8: utf8,
identifier.UTF16BE: utf16be,
identifier.UTF16LE: utf16le,
identifier.IBM866: ibm866,
identifier.ISOLatin2: iso8859_2,
identifier.ISOLatin3: iso8859_3,
identifier.ISOLatin4: iso8859_4,
identifier.ISOLatinCyrillic: iso8859_5,
identifier.ISOLatinArabic: iso8859_6,
identifier.ISOLatinGreek: iso8859_7,
identifier.ISOLatinHebrew: iso8859_8,
identifier.ISO88598I: iso8859_8I,
identifier.ISOLatin6: iso8859_10,
identifier.ISO885913: iso8859_13,
identifier.ISO885914: iso8859_14,
identifier.ISO885915: iso8859_15,
identifier.ISO885916: iso8859_16,
identifier.KOI8R: koi8r,
identifier.KOI8U: koi8u,
identifier.Macintosh: macintosh,
identifier.MacintoshCyrillic: macintoshCyrillic,
identifier.Windows874: windows874,
identifier.Windows1250: windows1250,
identifier.Windows1251: windows1251,
identifier.Windows1252: windows1252,
identifier.Windows1253: windows1253,
identifier.Windows1254: windows1254,
identifier.Windows1255: windows1255,
identifier.Windows1256: windows1256,
identifier.Windows1257: windows1257,
identifier.Windows1258: windows1258,
identifier.XUserDefined: xUserDefined,
identifier.GBK: gbk,
identifier.GB18030: gb18030,
identifier.Big5: big5,
identifier.EUCPkdFmtJapanese: eucjp,
identifier.ISO2022JP: iso2022jp,
identifier.ShiftJIS: shiftJIS,
identifier.EUCKR: euckr,
identifier.Replacement: replacement,
}
// encodings maps the internal htmlEncoding to an Encoding.
// TODO: consider using a reusable index in encoding/internal.
var encodings = [numEncodings]encoding.Encoding{
utf8: unicode.UTF8,
ibm866: charmap.CodePage866,
iso8859_2: charmap.ISO8859_2,
iso8859_3: charmap.ISO8859_3,
iso8859_4: charmap.ISO8859_4,
iso8859_5: charmap.ISO8859_5,
iso8859_6: charmap.ISO8859_6,
iso8859_7: charmap.ISO8859_7,
iso8859_8: charmap.ISO8859_8,
iso8859_8I: charmap.ISO8859_8I,
iso8859_10: charmap.ISO8859_10,
iso8859_13: charmap.ISO8859_13,
iso8859_14: charmap.ISO8859_14,
iso8859_15: charmap.ISO8859_15,
iso8859_16: charmap.ISO8859_16,
koi8r: charmap.KOI8R,
koi8u: charmap.KOI8U,
macintosh: charmap.Macintosh,
windows874: charmap.Windows874,
windows1250: charmap.Windows1250,
windows1251: charmap.Windows1251,
windows1252: charmap.Windows1252,
windows1253: charmap.Windows1253,
windows1254: charmap.Windows1254,
windows1255: charmap.Windows1255,
windows1256: charmap.Windows1256,
windows1257: charmap.Windows1257,
windows1258: charmap.Windows1258,
macintoshCyrillic: charmap.MacintoshCyrillic,
gbk: simplifiedchinese.GBK,
gb18030: simplifiedchinese.GB18030,
big5: traditionalchinese.Big5,
eucjp: japanese.EUCJP,
iso2022jp: japanese.ISO2022JP,
shiftJIS: japanese.ShiftJIS,
euckr: korean.EUCKR,
replacement: encoding.Replacement,
utf16be: unicode.UTF16(unicode.BigEndian, unicode.IgnoreBOM),
utf16le: unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM),
xUserDefined: charmap.XUserDefined,
}

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vendor/golang.org/x/text/encoding/htmlindex/tables.go generated vendored Normal file
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// This file was generated by go generate; DO NOT EDIT
package htmlindex
type htmlEncoding byte
const (
utf8 htmlEncoding = iota
ibm866
iso8859_2
iso8859_3
iso8859_4
iso8859_5
iso8859_6
iso8859_7
iso8859_8
iso8859_8I
iso8859_10
iso8859_13
iso8859_14
iso8859_15
iso8859_16
koi8r
koi8u
macintosh
windows874
windows1250
windows1251
windows1252
windows1253
windows1254
windows1255
windows1256
windows1257
windows1258
macintoshCyrillic
gbk
gb18030
big5
eucjp
iso2022jp
shiftJIS
euckr
replacement
utf16be
utf16le
xUserDefined
numEncodings
)
var canonical = [numEncodings]string{
"utf-8",
"ibm866",
"iso-8859-2",
"iso-8859-3",
"iso-8859-4",
"iso-8859-5",
"iso-8859-6",
"iso-8859-7",
"iso-8859-8",
"iso-8859-8-i",
"iso-8859-10",
"iso-8859-13",
"iso-8859-14",
"iso-8859-15",
"iso-8859-16",
"koi8-r",
"koi8-u",
"macintosh",
"windows-874",
"windows-1250",
"windows-1251",
"windows-1252",
"windows-1253",
"windows-1254",
"windows-1255",
"windows-1256",
"windows-1257",
"windows-1258",
"x-mac-cyrillic",
"gbk",
"gb18030",
"big5",
"euc-jp",
"iso-2022-jp",
"shift_jis",
"euc-kr",
"replacement",
"utf-16be",
"utf-16le",
"x-user-defined",
}
var nameMap = map[string]htmlEncoding{
"unicode-1-1-utf-8": utf8,
"utf-8": utf8,
"utf8": utf8,
"866": ibm866,
"cp866": ibm866,
"csibm866": ibm866,
"ibm866": ibm866,
"csisolatin2": iso8859_2,
"iso-8859-2": iso8859_2,
"iso-ir-101": iso8859_2,
"iso8859-2": iso8859_2,
"iso88592": iso8859_2,
"iso_8859-2": iso8859_2,
"iso_8859-2:1987": iso8859_2,
"l2": iso8859_2,
"latin2": iso8859_2,
"csisolatin3": iso8859_3,
"iso-8859-3": iso8859_3,
"iso-ir-109": iso8859_3,
"iso8859-3": iso8859_3,
"iso88593": iso8859_3,
"iso_8859-3": iso8859_3,
"iso_8859-3:1988": iso8859_3,
"l3": iso8859_3,
"latin3": iso8859_3,
"csisolatin4": iso8859_4,
"iso-8859-4": iso8859_4,
"iso-ir-110": iso8859_4,
"iso8859-4": iso8859_4,
"iso88594": iso8859_4,
"iso_8859-4": iso8859_4,
"iso_8859-4:1988": iso8859_4,
"l4": iso8859_4,
"latin4": iso8859_4,
"csisolatincyrillic": iso8859_5,
"cyrillic": iso8859_5,
"iso-8859-5": iso8859_5,
"iso-ir-144": iso8859_5,
"iso8859-5": iso8859_5,
"iso88595": iso8859_5,
"iso_8859-5": iso8859_5,
"iso_8859-5:1988": iso8859_5,
"arabic": iso8859_6,
"asmo-708": iso8859_6,
"csiso88596e": iso8859_6,
"csiso88596i": iso8859_6,
"csisolatinarabic": iso8859_6,
"ecma-114": iso8859_6,
"iso-8859-6": iso8859_6,
"iso-8859-6-e": iso8859_6,
"iso-8859-6-i": iso8859_6,
"iso-ir-127": iso8859_6,
"iso8859-6": iso8859_6,
"iso88596": iso8859_6,
"iso_8859-6": iso8859_6,
"iso_8859-6:1987": iso8859_6,
"csisolatingreek": iso8859_7,
"ecma-118": iso8859_7,
"elot_928": iso8859_7,
"greek": iso8859_7,
"greek8": iso8859_7,
"iso-8859-7": iso8859_7,
"iso-ir-126": iso8859_7,
"iso8859-7": iso8859_7,
"iso88597": iso8859_7,
"iso_8859-7": iso8859_7,
"iso_8859-7:1987": iso8859_7,
"sun_eu_greek": iso8859_7,
"csiso88598e": iso8859_8,
"csisolatinhebrew": iso8859_8,
"hebrew": iso8859_8,
"iso-8859-8": iso8859_8,
"iso-8859-8-e": iso8859_8,
"iso-ir-138": iso8859_8,
"iso8859-8": iso8859_8,
"iso88598": iso8859_8,
"iso_8859-8": iso8859_8,
"iso_8859-8:1988": iso8859_8,
"visual": iso8859_8,
"csiso88598i": iso8859_8I,
"iso-8859-8-i": iso8859_8I,
"logical": iso8859_8I,
"csisolatin6": iso8859_10,
"iso-8859-10": iso8859_10,
"iso-ir-157": iso8859_10,
"iso8859-10": iso8859_10,
"iso885910": iso8859_10,
"l6": iso8859_10,
"latin6": iso8859_10,
"iso-8859-13": iso8859_13,
"iso8859-13": iso8859_13,
"iso885913": iso8859_13,
"iso-8859-14": iso8859_14,
"iso8859-14": iso8859_14,
"iso885914": iso8859_14,
"csisolatin9": iso8859_15,
"iso-8859-15": iso8859_15,
"iso8859-15": iso8859_15,
"iso885915": iso8859_15,
"iso_8859-15": iso8859_15,
"l9": iso8859_15,
"iso-8859-16": iso8859_16,
"cskoi8r": koi8r,
"koi": koi8r,
"koi8": koi8r,
"koi8-r": koi8r,
"koi8_r": koi8r,
"koi8-ru": koi8u,
"koi8-u": koi8u,
"csmacintosh": macintosh,
"mac": macintosh,
"macintosh": macintosh,
"x-mac-roman": macintosh,
"dos-874": windows874,
"iso-8859-11": windows874,
"iso8859-11": windows874,
"iso885911": windows874,
"tis-620": windows874,
"windows-874": windows874,
"cp1250": windows1250,
"windows-1250": windows1250,
"x-cp1250": windows1250,
"cp1251": windows1251,
"windows-1251": windows1251,
"x-cp1251": windows1251,
"ansi_x3.4-1968": windows1252,
"ascii": windows1252,
"cp1252": windows1252,
"cp819": windows1252,
"csisolatin1": windows1252,
"ibm819": windows1252,
"iso-8859-1": windows1252,
"iso-ir-100": windows1252,
"iso8859-1": windows1252,
"iso88591": windows1252,
"iso_8859-1": windows1252,
"iso_8859-1:1987": windows1252,
"l1": windows1252,
"latin1": windows1252,
"us-ascii": windows1252,
"windows-1252": windows1252,
"x-cp1252": windows1252,
"cp1253": windows1253,
"windows-1253": windows1253,
"x-cp1253": windows1253,
"cp1254": windows1254,
"csisolatin5": windows1254,
"iso-8859-9": windows1254,
"iso-ir-148": windows1254,
"iso8859-9": windows1254,
"iso88599": windows1254,
"iso_8859-9": windows1254,
"iso_8859-9:1989": windows1254,
"l5": windows1254,
"latin5": windows1254,
"windows-1254": windows1254,
"x-cp1254": windows1254,
"cp1255": windows1255,
"windows-1255": windows1255,
"x-cp1255": windows1255,
"cp1256": windows1256,
"windows-1256": windows1256,
"x-cp1256": windows1256,
"cp1257": windows1257,
"windows-1257": windows1257,
"x-cp1257": windows1257,
"cp1258": windows1258,
"windows-1258": windows1258,
"x-cp1258": windows1258,
"x-mac-cyrillic": macintoshCyrillic,
"x-mac-ukrainian": macintoshCyrillic,
"chinese": gbk,
"csgb2312": gbk,
"csiso58gb231280": gbk,
"gb2312": gbk,
"gb_2312": gbk,
"gb_2312-80": gbk,
"gbk": gbk,
"iso-ir-58": gbk,
"x-gbk": gbk,
"gb18030": gb18030,
"big5": big5,
"big5-hkscs": big5,
"cn-big5": big5,
"csbig5": big5,
"x-x-big5": big5,
"cseucpkdfmtjapanese": eucjp,
"euc-jp": eucjp,
"x-euc-jp": eucjp,
"csiso2022jp": iso2022jp,
"iso-2022-jp": iso2022jp,
"csshiftjis": shiftJIS,
"ms932": shiftJIS,
"ms_kanji": shiftJIS,
"shift-jis": shiftJIS,
"shift_jis": shiftJIS,
"sjis": shiftJIS,
"windows-31j": shiftJIS,
"x-sjis": shiftJIS,
"cseuckr": euckr,
"csksc56011987": euckr,
"euc-kr": euckr,
"iso-ir-149": euckr,
"korean": euckr,
"ks_c_5601-1987": euckr,
"ks_c_5601-1989": euckr,
"ksc5601": euckr,
"ksc_5601": euckr,
"windows-949": euckr,
"csiso2022kr": replacement,
"hz-gb-2312": replacement,
"iso-2022-cn": replacement,
"iso-2022-cn-ext": replacement,
"iso-2022-kr": replacement,
"utf-16be": utf16be,
"utf-16": utf16le,
"utf-16le": utf16le,
"x-user-defined": xUserDefined,
}
var localeMap = []htmlEncoding{
windows1252, // und
windows1256, // ar
windows1251, // ba
windows1251, // be
windows1251, // bg
windows1250, // cs
iso8859_7, // el
windows1257, // et
windows1256, // fa
windows1255, // he
windows1250, // hr
iso8859_2, // hu
shiftJIS, // ja
windows1251, // kk
euckr, // ko
windows1254, // ku
windows1251, // ky
windows1257, // lt
windows1257, // lv
windows1251, // mk
iso8859_2, // pl
windows1251, // ru
windows1251, // sah
windows1250, // sk
iso8859_2, // sl
windows1251, // sr
windows1251, // tg
windows874, // th
windows1254, // tr
windows1251, // tt
windows1251, // uk
windows1258, // vi
gb18030, // zh-hans
big5, // zh-hant
}
const locales = "und ar ba be bg cs el et fa he hr hu ja kk ko ku ky lt lv mk pl ru sah sk sl sr tg th tr tt uk vi zh-hans zh-hant"

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ianaindex_test
import (
"fmt"
"golang.org/x/text/encoding/charmap"
"golang.org/x/text/encoding/ianaindex"
)
func ExampleIndex() {
fmt.Println(ianaindex.MIME.Name(charmap.ISO8859_7))
fmt.Println(ianaindex.IANA.Name(charmap.ISO8859_7))
e, _ := ianaindex.IANA.Get("cp437")
fmt.Println(ianaindex.IANA.Name(e))
// TODO: Output:
// ISO-8859-7
// ISO8859_7:1987
// IBM437
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package ianaindex maps names to Encodings as specified by the IANA registry.
// This includes both the MIME and IANA names.
//
// See http://www.iana.org/assignments/character-sets/character-sets.xhtml for
// more details.
package ianaindex
import (
"golang.org/x/text/encoding"
)
// TODO: allow users to specify their own aliases?
// TODO: allow users to specify their own indexes?
// TODO: allow canonicalizing names
// NOTE: only use these top-level variables if we can get the linker to drop
// the indexes when they are not used. Make them a function or perhaps only
// support MIME otherwise.
var (
// MIME is an index to map MIME names. It does not support aliases.
MIME *Index
// IANA is an index that supports all names and aliases using IANA names as
// the canonical identifier.
IANA *Index
)
// Index maps names registered by IANA to Encodings.
type Index struct {
}
// Get returns an Encoding for IANA-registered names. Matching is
// case-insensitive.
func (x *Index) Get(name string) (encoding.Encoding, error) {
panic("TODO: implement")
}
// Name reports the canonical name of the given Encoding. It will return an
// error if the e is not associated with a known encoding scheme.
func (x *Index) Name(e encoding.Encoding) (string, error) {
panic("TODO: implement")
}
// TODO: the coverage of this index is rather spotty. Allowing users to set
// encodings would allow:
// - users to increase coverage
// - allow a partially loaded set of encodings in case the user doesn't need to
// them all.
// - write an OS-specific wrapper for supported encodings and set them.
// The exact definition of Set depends a bit on if and how we want to let users
// write their own Encoding implementations. Also, it is not possible yet to
// only partially load the encodings without doing some refactoring. Until this
// is solved, we might as well not support Set.
// // Set sets the e to be used for the encoding scheme identified by name. Only
// // canonical names may be used. An empty name assigns e to its internally
// // associated encoding scheme.
// func (x *Index) Set(name string, e encoding.Encoding) error {
// panic("TODO: implement")
// }

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
package main
import (
"bytes"
"encoding/xml"
"fmt"
"io"
"log"
"strings"
"golang.org/x/text/internal/gen"
)
type registry struct {
XMLName xml.Name `xml:"registry"`
Updated string `xml:"updated"`
Registry []struct {
ID string `xml:"id,attr"`
Record []struct {
Name string `xml:"name"`
Xref []struct {
Type string `xml:"type,attr"`
Data string `xml:"data,attr"`
} `xml:"xref"`
Desc struct {
Data string `xml:",innerxml"`
// Any []struct {
// Data string `xml:",chardata"`
// } `xml:",any"`
// Data string `xml:",chardata"`
} `xml:"description,"`
MIB string `xml:"value"`
Alias []string `xml:"alias"`
MIME string `xml:"preferred_alias"`
} `xml:"record"`
} `xml:"registry"`
}
func main() {
r := gen.OpenIANAFile("assignments/character-sets/character-sets.xml")
reg := &registry{}
if err := xml.NewDecoder(r).Decode(&reg); err != nil && err != io.EOF {
log.Fatalf("Error decoding charset registry: %v", err)
}
if len(reg.Registry) == 0 || reg.Registry[0].ID != "character-sets-1" {
log.Fatalf("Unexpected ID %s", reg.Registry[0].ID)
}
w := &bytes.Buffer{}
fmt.Fprintf(w, "const (\n")
for _, rec := range reg.Registry[0].Record {
constName := ""
for _, a := range rec.Alias {
if strings.HasPrefix(a, "cs") && strings.IndexByte(a, '-') == -1 {
// Some of the constant definitions have comments in them. Strip those.
constName = strings.Title(strings.SplitN(a[2:], "\n", 2)[0])
}
}
if constName == "" {
switch rec.MIB {
case "2085":
constName = "HZGB2312" // Not listed as alias for some reason.
default:
log.Fatalf("No cs alias defined for %s.", rec.MIB)
}
}
if rec.MIME != "" {
rec.MIME = fmt.Sprintf(" (MIME: %s)", rec.MIME)
}
fmt.Fprintf(w, "// %s is the MIB identifier with IANA name %s%s.\n//\n", constName, rec.Name, rec.MIME)
if len(rec.Desc.Data) > 0 {
fmt.Fprint(w, "// ")
d := xml.NewDecoder(strings.NewReader(rec.Desc.Data))
inElem := true
attr := ""
for {
t, err := d.Token()
if err != nil {
if err != io.EOF {
log.Fatal(err)
}
break
}
switch x := t.(type) {
case xml.CharData:
attr = "" // Don't need attribute info.
a := bytes.Split([]byte(x), []byte("\n"))
for i, b := range a {
if b = bytes.TrimSpace(b); len(b) != 0 {
if !inElem && i > 0 {
fmt.Fprint(w, "\n// ")
}
inElem = false
fmt.Fprintf(w, "%s ", string(b))
}
}
case xml.StartElement:
if x.Name.Local == "xref" {
inElem = true
use := false
for _, a := range x.Attr {
if a.Name.Local == "type" {
use = use || a.Value != "person"
}
if a.Name.Local == "data" && use {
attr = a.Value + " "
}
}
}
case xml.EndElement:
inElem = false
fmt.Fprint(w, attr)
}
}
fmt.Fprint(w, "\n")
}
for _, x := range rec.Xref {
switch x.Type {
case "rfc":
fmt.Fprintf(w, "// Reference: %s\n", strings.ToUpper(x.Data))
case "uri":
fmt.Fprintf(w, "// Reference: %s\n", x.Data)
}
}
fmt.Fprintf(w, "%s MIB = %s\n", constName, rec.MIB)
fmt.Fprintln(w)
}
fmt.Fprintln(w, ")")
gen.WriteGoFile("mib.go", "identifier", w.Bytes())
}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:generate go run gen.go
// Package identifier defines the contract between implementations of Encoding
// and Index by defining identifiers that uniquely identify standardized coded
// character sets (CCS) and character encoding schemes (CES), which we will
// together refer to as encodings, for which Encoding implementations provide
// converters to and from UTF-8. This package is typically only of concern to
// implementers of Indexes and Encodings.
//
// One part of the identifier is the MIB code, which is defined by IANA and
// uniquely identifies a CCS or CES. Each code is associated with data that
// references authorities, official documentation as well as aliases and MIME
// names.
//
// Not all CESs are covered by the IANA registry. The "other" string that is
// returned by ID can be used to identify other character sets or versions of
// existing ones.
//
// It is recommended that each package that provides a set of Encodings provide
// the All and Common variables to reference all supported encodings and
// commonly used subset. This allows Index implementations to include all
// available encodings without explicitly referencing or knowing about them.
package identifier
// Note: this package is internal, but could be made public if there is a need
// for writing third-party Indexes and Encodings.
// References:
// - http://source.icu-project.org/repos/icu/icu/trunk/source/data/mappings/convrtrs.txt
// - http://www.iana.org/assignments/character-sets/character-sets.xhtml
// - http://www.iana.org/assignments/ianacharset-mib/ianacharset-mib
// - http://www.ietf.org/rfc/rfc2978.txt
// - http://www.unicode.org/reports/tr22/
// - http://www.w3.org/TR/encoding/
// - http://www.w3.org/TR/encoding/indexes/encodings.json
// - https://encoding.spec.whatwg.org/
// - https://tools.ietf.org/html/rfc6657#section-5
// Interface can be implemented by Encodings to define the CCS or CES for which
// it implements conversions.
type Interface interface {
// ID returns an encoding identifier. Exactly one of the mib and other
// values should be non-zero.
//
// In the usual case it is only necessary to indicate the MIB code. The
// other string can be used to specify encodings for which there is no MIB,
// such as "x-mac-dingbat".
//
// The other string may only contain the characters a-z, A-Z, 0-9, - and _.
ID() (mib MIB, other string)
// NOTE: the restrictions on the encoding are to allow extending the syntax
// with additional information such as versions, vendors and other variants.
}
// A MIB identifies an encoding. It is derived from the IANA MIB codes and adds
// some identifiers for some encodings that are not covered by the IANA
// standard.
//
// See http://www.iana.org/assignments/ianacharset-mib.
type MIB uint16
// These additional MIB types are not defined in IANA. They are added because
// they are common and defined within the text repo.
const (
// Unofficial marks the start of encodings not registered by IANA.
Unofficial MIB = 10000 + iota
// Replacement is the WhatWG replacement encoding.
Replacement
// XUserDefined is the code for x-user-defined.
XUserDefined
// MacintoshCyrillic is the code for x-mac-cyrillic.
MacintoshCyrillic
)

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package internal contains code that is shared among encoding implementations.
package internal
import (
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// Encoding is an implementation of the Encoding interface that adds the String
// and ID methods to an existing encoding.
type Encoding struct {
encoding.Encoding
Name string
MIB identifier.MIB
}
// _ verifies that Encoding implements identifier.Interface.
var _ identifier.Interface = (*Encoding)(nil)
func (e *Encoding) String() string {
return e.Name
}
func (e *Encoding) ID() (mib identifier.MIB, other string) {
return e.MIB, ""
}
// SimpleEncoding is an Encoding that combines two Transformers.
type SimpleEncoding struct {
Decoder transform.Transformer
Encoder transform.Transformer
}
func (e *SimpleEncoding) NewDecoder() *encoding.Decoder {
return &encoding.Decoder{Transformer: e.Decoder}
}
func (e *SimpleEncoding) NewEncoder() *encoding.Encoder {
return &encoding.Encoder{Transformer: e.Encoder}
}
// FuncEncoding is an Encoding that combines two functions returning a new
// Transformer.
type FuncEncoding struct {
Decoder func() transform.Transformer
Encoder func() transform.Transformer
}
func (e FuncEncoding) NewDecoder() *encoding.Decoder {
return &encoding.Decoder{Transformer: e.Decoder()}
}
func (e FuncEncoding) NewEncoder() *encoding.Encoder {
return &encoding.Encoder{Transformer: e.Encoder()}
}
// A RepertoireError indicates a rune is not in the repertoire of a destination
// encoding. It is associated with an encoding-specific suggested replacement
// byte.
type RepertoireError byte
// Error implements the error interrface.
func (r RepertoireError) Error() string {
return "encoding: rune not supported by encoding."
}
// Replacement returns the replacement string associated with this error.
func (r RepertoireError) Replacement() byte { return byte(r) }
var ErrASCIIReplacement = RepertoireError(encoding.ASCIISub)

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package japanese
import (
"golang.org/x/text/encoding"
)
// All is a list of all defined encodings in this package.
var All = []encoding.Encoding{EUCJP, ISO2022JP, ShiftJIS}

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package japanese
import (
"testing"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/transform"
)
func dec(e encoding.Encoding) (dir string, t transform.Transformer, err error) {
return "Decode", e.NewDecoder(), nil
}
func enc(e encoding.Encoding) (dir string, t transform.Transformer, err error) {
return "Encode", e.NewEncoder(), internal.ErrASCIIReplacement
}
func TestNonRepertoire(t *testing.T) {
testCases := []struct {
init func(e encoding.Encoding) (string, transform.Transformer, error)
e encoding.Encoding
src, want string
}{
{dec, EUCJP, "\xfe\xfc", "\ufffd"},
{dec, ISO2022JP, "\x1b$B\x7e\x7e", "\ufffd"},
{dec, ShiftJIS, "\xef\xfc", "\ufffd"},
{enc, EUCJP, "갂", ""},
{enc, EUCJP, "a갂", "a"},
{enc, EUCJP, "丌갂", "\x8f\xb0\xa4"},
{enc, ISO2022JP, "갂", ""},
{enc, ISO2022JP, "a갂", "a"},
{enc, ISO2022JP, "朗갂", "\x1b$BzF\x1b(B"}, // switch back to ASCII mode at end
{enc, ShiftJIS, "갂", ""},
{enc, ShiftJIS, "a갂", "a"},
{enc, ShiftJIS, "\u2190갂", "\x81\xa9"},
}
for _, tc := range testCases {
dir, tr, wantErr := tc.init(tc.e)
dst, _, err := transform.String(tr, tc.src)
if err != wantErr {
t.Errorf("%s %v(%q): got %v; want %v", dir, tc.e, tc.src, err, wantErr)
}
if got := string(dst); got != tc.want {
t.Errorf("%s %v(%q):\ngot %q\nwant %q", dir, tc.e, tc.src, got, tc.want)
}
}
}
func TestCorrect(t *testing.T) {
testCases := []struct {
init func(e encoding.Encoding) (string, transform.Transformer, error)
e encoding.Encoding
src, want string
}{
{dec, ShiftJIS, "\x9f\xfc", "滌"},
{dec, ShiftJIS, "\xfb\xfc", "髙"},
{dec, ShiftJIS, "\xfa\xb1", "﨑"},
{enc, ShiftJIS, "滌", "\x9f\xfc"},
{enc, ShiftJIS, "﨑", "\xed\x95"},
}
for _, tc := range testCases {
dir, tr, _ := tc.init(tc.e)
dst, _, err := transform.String(tr, tc.src)
if err != nil {
t.Errorf("%s %v(%q): got %v; want %v", dir, tc.e, tc.src, err, nil)
}
if got := string(dst); got != tc.want {
t.Errorf("%s %v(%q):\ngot %q\nwant %q", dir, tc.e, tc.src, got, tc.want)
}
}
}

211
vendor/golang.org/x/text/encoding/japanese/eucjp.go generated vendored Normal file
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@ -0,0 +1,211 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package japanese
import (
"errors"
"unicode/utf8"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// EUCJP is the EUC-JP encoding.
var EUCJP encoding.Encoding = &eucJP
var eucJP = internal.Encoding{
&internal.SimpleEncoding{eucJPDecoder{}, eucJPEncoder{}},
"EUC-JP",
identifier.EUCPkdFmtJapanese,
}
var errInvalidEUCJP = errors.New("japanese: invalid EUC-JP encoding")
type eucJPDecoder struct{ transform.NopResetter }
func (eucJPDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
loop:
for ; nSrc < len(src); nSrc += size {
switch c0 := src[nSrc]; {
case c0 < utf8.RuneSelf:
r, size = rune(c0), 1
case c0 == 0x8e:
if nSrc+1 >= len(src) {
err = transform.ErrShortSrc
break loop
}
c1 := src[nSrc+1]
if c1 < 0xa1 || 0xdf < c1 {
err = errInvalidEUCJP
break loop
}
r, size = rune(c1)+(0xff61-0xa1), 2
case c0 == 0x8f:
if nSrc+2 >= len(src) {
err = transform.ErrShortSrc
break loop
}
c1 := src[nSrc+1]
if c1 < 0xa1 || 0xfe < c1 {
err = errInvalidEUCJP
break loop
}
c2 := src[nSrc+2]
if c2 < 0xa1 || 0xfe < c2 {
err = errInvalidEUCJP
break loop
}
r, size = '\ufffd', 3
if i := int(c1-0xa1)*94 + int(c2-0xa1); i < len(jis0212Decode) {
r = rune(jis0212Decode[i])
if r == 0 {
r = '\ufffd'
}
}
case 0xa1 <= c0 && c0 <= 0xfe:
if nSrc+1 >= len(src) {
err = transform.ErrShortSrc
break loop
}
c1 := src[nSrc+1]
if c1 < 0xa1 || 0xfe < c1 {
err = errInvalidEUCJP
break loop
}
r, size = '\ufffd', 2
if i := int(c0-0xa1)*94 + int(c1-0xa1); i < len(jis0208Decode) {
r = rune(jis0208Decode[i])
if r == 0 {
r = '\ufffd'
}
}
default:
err = errInvalidEUCJP
break loop
}
if nDst+utf8.RuneLen(r) > len(dst) {
err = transform.ErrShortDst
break loop
}
nDst += utf8.EncodeRune(dst[nDst:], r)
}
if atEOF && err == transform.ErrShortSrc {
err = errInvalidEUCJP
}
return nDst, nSrc, err
}
type eucJPEncoder struct{ transform.NopResetter }
func (eucJPEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
for ; nSrc < len(src); nSrc += size {
r = rune(src[nSrc])
// Decode a 1-byte rune.
if r < utf8.RuneSelf {
size = 1
} else {
// Decode a multi-byte rune.
r, size = utf8.DecodeRune(src[nSrc:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
if !atEOF && !utf8.FullRune(src[nSrc:]) {
err = transform.ErrShortSrc
break
}
}
// func init checks that the switch covers all tables.
switch {
case encode0Low <= r && r < encode0High:
if r = rune(encode0[r-encode0Low]); r != 0 {
goto write2or3
}
case encode1Low <= r && r < encode1High:
if r = rune(encode1[r-encode1Low]); r != 0 {
goto write2or3
}
case encode2Low <= r && r < encode2High:
if r = rune(encode2[r-encode2Low]); r != 0 {
goto write2or3
}
case encode3Low <= r && r < encode3High:
if r = rune(encode3[r-encode3Low]); r != 0 {
goto write2or3
}
case encode4Low <= r && r < encode4High:
if r = rune(encode4[r-encode4Low]); r != 0 {
goto write2or3
}
case encode5Low <= r && r < encode5High:
if 0xff61 <= r && r < 0xffa0 {
goto write2
}
if r = rune(encode5[r-encode5Low]); r != 0 {
goto write2or3
}
}
err = internal.ErrASCIIReplacement
break
}
if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = uint8(r)
nDst++
continue
write2or3:
if r>>tableShift == jis0208 {
if nDst+2 > len(dst) {
err = transform.ErrShortDst
break
}
} else {
if nDst+3 > len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = 0x8f
nDst++
}
dst[nDst+0] = 0xa1 + uint8(r>>codeShift)&codeMask
dst[nDst+1] = 0xa1 + uint8(r)&codeMask
nDst += 2
continue
write2:
if nDst+2 > len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst+0] = 0x8e
dst[nDst+1] = uint8(r - (0xff61 - 0xa1))
nDst += 2
continue
}
return nDst, nSrc, err
}
func init() {
// Check that the hard-coded encode switch covers all tables.
if numEncodeTables != 6 {
panic("bad numEncodeTables")
}
}

296
vendor/golang.org/x/text/encoding/japanese/iso2022jp.go generated vendored Normal file
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@ -0,0 +1,296 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package japanese
import (
"errors"
"unicode/utf8"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// ISO2022JP is the ISO-2022-JP encoding.
var ISO2022JP encoding.Encoding = &iso2022JP
var iso2022JP = internal.Encoding{
internal.FuncEncoding{iso2022JPNewDecoder, iso2022JPNewEncoder},
"ISO-2022-JP",
identifier.ISO2022JP,
}
func iso2022JPNewDecoder() transform.Transformer {
return new(iso2022JPDecoder)
}
func iso2022JPNewEncoder() transform.Transformer {
return new(iso2022JPEncoder)
}
var errInvalidISO2022JP = errors.New("japanese: invalid ISO-2022-JP encoding")
const (
asciiState = iota
katakanaState
jis0208State
jis0212State
)
const asciiEsc = 0x1b
type iso2022JPDecoder int
func (d *iso2022JPDecoder) Reset() {
*d = asciiState
}
func (d *iso2022JPDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
loop:
for ; nSrc < len(src); nSrc += size {
c0 := src[nSrc]
if c0 >= utf8.RuneSelf {
err = errInvalidISO2022JP
break loop
}
if c0 == asciiEsc {
if nSrc+2 >= len(src) {
err = transform.ErrShortSrc
break loop
}
size = 3
c1 := src[nSrc+1]
c2 := src[nSrc+2]
switch {
case c1 == '$' && (c2 == '@' || c2 == 'B'):
*d = jis0208State
continue
case c1 == '$' && c2 == '(':
if nSrc+3 >= len(src) {
err = transform.ErrShortSrc
break loop
}
size = 4
if src[nSrc]+3 == 'D' {
*d = jis0212State
continue
}
case c1 == '(' && (c2 == 'B' || c2 == 'J'):
*d = asciiState
continue
case c1 == '(' && c2 == 'I':
*d = katakanaState
continue
}
err = errInvalidISO2022JP
break loop
}
switch *d {
case asciiState:
r, size = rune(c0), 1
case katakanaState:
if c0 < 0x21 || 0x60 <= c0 {
err = errInvalidISO2022JP
break loop
}
r, size = rune(c0)+(0xff61-0x21), 1
default:
if c0 == 0x0a {
*d = asciiState
r, size = rune(c0), 1
break
}
if nSrc+1 >= len(src) {
err = transform.ErrShortSrc
break loop
}
size = 2
c1 := src[nSrc+1]
i := int(c0-0x21)*94 + int(c1-0x21)
if *d == jis0208State && i < len(jis0208Decode) {
r = rune(jis0208Decode[i])
} else if *d == jis0212State && i < len(jis0212Decode) {
r = rune(jis0212Decode[i])
} else {
r = '\ufffd'
break
}
if r == 0 {
r = '\ufffd'
}
}
if nDst+utf8.RuneLen(r) > len(dst) {
err = transform.ErrShortDst
break loop
}
nDst += utf8.EncodeRune(dst[nDst:], r)
}
if atEOF && err == transform.ErrShortSrc {
err = errInvalidISO2022JP
}
return nDst, nSrc, err
}
type iso2022JPEncoder int
func (e *iso2022JPEncoder) Reset() {
*e = asciiState
}
func (e *iso2022JPEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
for ; nSrc < len(src); nSrc += size {
r = rune(src[nSrc])
// Decode a 1-byte rune.
if r < utf8.RuneSelf {
size = 1
} else {
// Decode a multi-byte rune.
r, size = utf8.DecodeRune(src[nSrc:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
if !atEOF && !utf8.FullRune(src[nSrc:]) {
err = transform.ErrShortSrc
break
}
}
// func init checks that the switch covers all tables.
//
// http://encoding.spec.whatwg.org/#iso-2022-jp says that "the index jis0212
// is not used by the iso-2022-jp encoder due to lack of widespread support".
//
// TODO: do we have to special-case U+00A5 and U+203E, as per
// http://encoding.spec.whatwg.org/#iso-2022-jp
// Doing so would mean that "\u00a5" would not be preserved
// after an encode-decode round trip.
switch {
case encode0Low <= r && r < encode0High:
if r = rune(encode0[r-encode0Low]); r>>tableShift == jis0208 {
goto writeJIS
}
case encode1Low <= r && r < encode1High:
if r = rune(encode1[r-encode1Low]); r>>tableShift == jis0208 {
goto writeJIS
}
case encode2Low <= r && r < encode2High:
if r = rune(encode2[r-encode2Low]); r>>tableShift == jis0208 {
goto writeJIS
}
case encode3Low <= r && r < encode3High:
if r = rune(encode3[r-encode3Low]); r>>tableShift == jis0208 {
goto writeJIS
}
case encode4Low <= r && r < encode4High:
if r = rune(encode4[r-encode4Low]); r>>tableShift == jis0208 {
goto writeJIS
}
case encode5Low <= r && r < encode5High:
if 0xff61 <= r && r < 0xffa0 {
goto writeKatakana
}
if r = rune(encode5[r-encode5Low]); r>>tableShift == jis0208 {
goto writeJIS
}
}
// Switch back to ASCII state in case of error so that an ASCII
// replacement character can be written in the correct state.
if *e != asciiState {
if nDst+3 > len(dst) {
err = transform.ErrShortDst
break
}
*e = asciiState
dst[nDst+0] = asciiEsc
dst[nDst+1] = '('
dst[nDst+2] = 'B'
nDst += 3
}
err = internal.ErrASCIIReplacement
break
}
if *e != asciiState {
if nDst+4 > len(dst) {
err = transform.ErrShortDst
break
}
*e = asciiState
dst[nDst+0] = asciiEsc
dst[nDst+1] = '('
dst[nDst+2] = 'B'
nDst += 3
} else if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = uint8(r)
nDst++
continue
writeJIS:
if *e != jis0208State {
if nDst+5 > len(dst) {
err = transform.ErrShortDst
break
}
*e = jis0208State
dst[nDst+0] = asciiEsc
dst[nDst+1] = '$'
dst[nDst+2] = 'B'
nDst += 3
} else if nDst+2 > len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst+0] = 0x21 + uint8(r>>codeShift)&codeMask
dst[nDst+1] = 0x21 + uint8(r)&codeMask
nDst += 2
continue
writeKatakana:
if *e != katakanaState {
if nDst+4 > len(dst) {
err = transform.ErrShortDst
break
}
*e = katakanaState
dst[nDst+0] = asciiEsc
dst[nDst+1] = '('
dst[nDst+2] = 'I'
nDst += 3
} else if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = uint8(r - (0xff61 - 0x21))
nDst++
continue
}
if atEOF && err == nil && *e != asciiState {
if nDst+3 > len(dst) {
err = transform.ErrShortDst
} else {
*e = asciiState
dst[nDst+0] = asciiEsc
dst[nDst+1] = '('
dst[nDst+2] = 'B'
nDst += 3
}
}
return nDst, nSrc, err
}

161
vendor/golang.org/x/text/encoding/japanese/maketables.go generated vendored Normal file
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@ -0,0 +1,161 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
package main
// This program generates tables.go:
// go run maketables.go | gofmt > tables.go
// TODO: Emoji extensions?
// http://www.unicode.org/faq/emoji_dingbats.html
// http://www.unicode.org/Public/UNIDATA/EmojiSources.txt
import (
"bufio"
"fmt"
"log"
"net/http"
"sort"
"strings"
)
type entry struct {
jisCode, table int
}
func main() {
fmt.Printf("// generated by go run maketables.go; DO NOT EDIT\n\n")
fmt.Printf("// Package japanese provides Japanese encodings such as EUC-JP and Shift JIS.\n")
fmt.Printf(`package japanese // import "golang.org/x/text/encoding/japanese"` + "\n\n")
reverse := [65536]entry{}
for i := range reverse {
reverse[i].table = -1
}
tables := []struct {
url string
name string
}{
{"http://encoding.spec.whatwg.org/index-jis0208.txt", "0208"},
{"http://encoding.spec.whatwg.org/index-jis0212.txt", "0212"},
}
for i, table := range tables {
res, err := http.Get(table.url)
if err != nil {
log.Fatalf("%q: Get: %v", table.url, err)
}
defer res.Body.Close()
mapping := [65536]uint16{}
scanner := bufio.NewScanner(res.Body)
for scanner.Scan() {
s := strings.TrimSpace(scanner.Text())
if s == "" || s[0] == '#' {
continue
}
x, y := 0, uint16(0)
if _, err := fmt.Sscanf(s, "%d 0x%x", &x, &y); err != nil {
log.Fatalf("%q: could not parse %q", table.url, s)
}
if x < 0 || 120*94 <= x {
log.Fatalf("%q: JIS code %d is out of range", table.url, x)
}
mapping[x] = y
if reverse[y].table == -1 {
reverse[y] = entry{jisCode: x, table: i}
}
}
if err := scanner.Err(); err != nil {
log.Fatalf("%q: scanner error: %v", table.url, err)
}
fmt.Printf("// jis%sDecode is the decoding table from JIS %s code to Unicode.\n// It is defined at %s\n",
table.name, table.name, table.url)
fmt.Printf("var jis%sDecode = [...]uint16{\n", table.name)
for i, m := range mapping {
if m != 0 {
fmt.Printf("\t%d: 0x%04X,\n", i, m)
}
}
fmt.Printf("}\n\n")
}
// Any run of at least separation continuous zero entries in the reverse map will
// be a separate encode table.
const separation = 1024
intervals := []interval(nil)
low, high := -1, -1
for i, v := range reverse {
if v.table == -1 {
continue
}
if low < 0 {
low = i
} else if i-high >= separation {
if high >= 0 {
intervals = append(intervals, interval{low, high})
}
low = i
}
high = i + 1
}
if high >= 0 {
intervals = append(intervals, interval{low, high})
}
sort.Sort(byDecreasingLength(intervals))
fmt.Printf("const (\n")
fmt.Printf("\tjis0208 = 1\n")
fmt.Printf("\tjis0212 = 2\n")
fmt.Printf("\tcodeMask = 0x7f\n")
fmt.Printf("\tcodeShift = 7\n")
fmt.Printf("\ttableShift = 14\n")
fmt.Printf(")\n\n")
fmt.Printf("const numEncodeTables = %d\n\n", len(intervals))
fmt.Printf("// encodeX are the encoding tables from Unicode to JIS code,\n")
fmt.Printf("// sorted by decreasing length.\n")
for i, v := range intervals {
fmt.Printf("// encode%d: %5d entries for runes in [%5d, %5d).\n", i, v.len(), v.low, v.high)
}
fmt.Printf("//\n")
fmt.Printf("// The high two bits of the value record whether the JIS code comes from the\n")
fmt.Printf("// JIS0208 table (high bits == 1) or the JIS0212 table (high bits == 2).\n")
fmt.Printf("// The low 14 bits are two 7-bit unsigned integers j1 and j2 that form the\n")
fmt.Printf("// JIS code (94*j1 + j2) within that table.\n")
fmt.Printf("\n")
for i, v := range intervals {
fmt.Printf("const encode%dLow, encode%dHigh = %d, %d\n\n", i, i, v.low, v.high)
fmt.Printf("var encode%d = [...]uint16{\n", i)
for j := v.low; j < v.high; j++ {
x := reverse[j]
if x.table == -1 {
continue
}
fmt.Printf("\t%d - %d: jis%s<<14 | 0x%02X<<7 | 0x%02X,\n",
j, v.low, tables[x.table].name, x.jisCode/94, x.jisCode%94)
}
fmt.Printf("}\n\n")
}
}
// interval is a half-open interval [low, high).
type interval struct {
low, high int
}
func (i interval) len() int { return i.high - i.low }
// byDecreasingLength sorts intervals by decreasing length.
type byDecreasingLength []interval
func (b byDecreasingLength) Len() int { return len(b) }
func (b byDecreasingLength) Less(i, j int) bool { return b[i].len() > b[j].len() }
func (b byDecreasingLength) Swap(i, j int) { b[i], b[j] = b[j], b[i] }

189
vendor/golang.org/x/text/encoding/japanese/shiftjis.go generated vendored Normal file
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@ -0,0 +1,189 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package japanese
import (
"errors"
"unicode/utf8"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/encoding/internal/identifier"
"golang.org/x/text/transform"
)
// ShiftJIS is the Shift JIS encoding, also known as Code Page 932 and
// Windows-31J.
var ShiftJIS encoding.Encoding = &shiftJIS
var shiftJIS = internal.Encoding{
&internal.SimpleEncoding{shiftJISDecoder{}, shiftJISEncoder{}},
"Shift JIS",
identifier.ShiftJIS,
}
var errInvalidShiftJIS = errors.New("japanese: invalid Shift JIS encoding")
type shiftJISDecoder struct{ transform.NopResetter }
func (shiftJISDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
loop:
for ; nSrc < len(src); nSrc += size {
switch c0 := src[nSrc]; {
case c0 < utf8.RuneSelf:
r, size = rune(c0), 1
case 0xa1 <= c0 && c0 < 0xe0:
r, size = rune(c0)+(0xff61-0xa1), 1
case (0x81 <= c0 && c0 < 0xa0) || (0xe0 <= c0 && c0 < 0xfd):
if c0 <= 0x9f {
c0 -= 0x70
} else {
c0 -= 0xb0
}
c0 = 2*c0 - 0x21
if nSrc+1 >= len(src) {
err = transform.ErrShortSrc
break loop
}
c1 := src[nSrc+1]
switch {
case c1 < 0x40:
err = errInvalidShiftJIS
break loop
case c1 < 0x7f:
c0--
c1 -= 0x40
case c1 == 0x7f:
err = errInvalidShiftJIS
break loop
case c1 < 0x9f:
c0--
c1 -= 0x41
case c1 < 0xfd:
c1 -= 0x9f
default:
err = errInvalidShiftJIS
break loop
}
r, size = '\ufffd', 2
if i := int(c0)*94 + int(c1); i < len(jis0208Decode) {
r = rune(jis0208Decode[i])
if r == 0 {
r = '\ufffd'
}
}
default:
err = errInvalidShiftJIS
break loop
}
if nDst+utf8.RuneLen(r) > len(dst) {
err = transform.ErrShortDst
break loop
}
nDst += utf8.EncodeRune(dst[nDst:], r)
}
if atEOF && err == transform.ErrShortSrc {
err = errInvalidShiftJIS
}
return nDst, nSrc, err
}
type shiftJISEncoder struct{ transform.NopResetter }
func (shiftJISEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
r, size := rune(0), 0
loop:
for ; nSrc < len(src); nSrc += size {
r = rune(src[nSrc])
// Decode a 1-byte rune.
if r < utf8.RuneSelf {
size = 1
} else {
// Decode a multi-byte rune.
r, size = utf8.DecodeRune(src[nSrc:])
if size == 1 {
// All valid runes of size 1 (those below utf8.RuneSelf) were
// handled above. We have invalid UTF-8 or we haven't seen the
// full character yet.
if !atEOF && !utf8.FullRune(src[nSrc:]) {
err = transform.ErrShortSrc
break loop
}
}
// func init checks that the switch covers all tables.
switch {
case encode0Low <= r && r < encode0High:
if r = rune(encode0[r-encode0Low]); r>>tableShift == jis0208 {
goto write2
}
case encode1Low <= r && r < encode1High:
if r = rune(encode1[r-encode1Low]); r>>tableShift == jis0208 {
goto write2
}
case encode2Low <= r && r < encode2High:
if r = rune(encode2[r-encode2Low]); r>>tableShift == jis0208 {
goto write2
}
case encode3Low <= r && r < encode3High:
if r = rune(encode3[r-encode3Low]); r>>tableShift == jis0208 {
goto write2
}
case encode4Low <= r && r < encode4High:
if r = rune(encode4[r-encode4Low]); r>>tableShift == jis0208 {
goto write2
}
case encode5Low <= r && r < encode5High:
if 0xff61 <= r && r < 0xffa0 {
r -= 0xff61 - 0xa1
goto write1
}
if r = rune(encode5[r-encode5Low]); r>>tableShift == jis0208 {
goto write2
}
}
err = internal.ErrASCIIReplacement
break
}
write1:
if nDst >= len(dst) {
err = transform.ErrShortDst
break
}
dst[nDst] = uint8(r)
nDst++
continue
write2:
j1 := uint8(r>>codeShift) & codeMask
j2 := uint8(r) & codeMask
if nDst+2 > len(dst) {
err = transform.ErrShortDst
break loop
}
if j1 <= 61 {
dst[nDst+0] = 129 + j1/2
} else {
dst[nDst+0] = 193 + j1/2
}
if j1&1 == 0 {
dst[nDst+1] = j2 + j2/63 + 64
} else {
dst[nDst+1] = j2 + 159
}
nDst += 2
continue
}
return nDst, nSrc, err
}

26971
vendor/golang.org/x/text/encoding/japanese/tables.go generated vendored Normal file
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File diff suppressed because it is too large Load Diff

47
vendor/golang.org/x/text/encoding/korean/all_test.go generated vendored Normal file
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@ -0,0 +1,47 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package korean
import (
"testing"
"golang.org/x/text/encoding"
"golang.org/x/text/encoding/internal"
"golang.org/x/text/transform"
)
func dec(e encoding.Encoding) (dir string, t transform.Transformer, err error) {
return "Decode", e.NewDecoder(), nil
}
func enc(e encoding.Encoding) (dir string, t transform.Transformer, err error) {
return "Encode", e.NewEncoder(), internal.ErrASCIIReplacement
}
func TestNonRepertoire(t *testing.T) {
testCases := []struct {
init func(e encoding.Encoding) (string, transform.Transformer, error)
e encoding.Encoding
src, want string
}{
{dec, EUCKR, "\xfe\xfe", "\ufffd"},
// {dec, EUCKR, "א", "\ufffd"}, // TODO: why is this different?
{enc, EUCKR, "א", ""},
{enc, EUCKR, "aא", "a"},
{enc, EUCKR, "\uac00א", "\xb0\xa1"},
// TODO: should we also handle Jamo?
}
for _, tc := range testCases {
dir, tr, wantErr := tc.init(tc.e)
dst, _, err := transform.String(tr, tc.src)
if err != wantErr {
t.Errorf("%s %v(%q): got %v; want %v", dir, tc.e, tc.src, err, wantErr)
}
if got := string(dst); got != tc.want {
t.Errorf("%s %v(%q):\ngot %q\nwant %q", dir, tc.e, tc.src, got, tc.want)
}
}
}

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