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2c8b627008
Integers are for numbers, enabling arithmetic like subtractions and for loops without getting shot in the foot. Unsigneds are for bitfields. - "int" for numbers that will always be laughably smaller than four billion, and where we don't care about the serialization format. - "int32" for numbers that will always be laughably smaller than four billion, and will be serialized to four bytes. - "int64" for numbers that may approach four billion or will be serialized to eight bytes. - "uint32" and "uint64" for bitfields, depending on required number of bits and serialization format. Likewise "uint8" and "uint16", although rare in this project since they don't exist in XDR. - "int8", "int16" and plain "uint" are almost never useful.
76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
// Copyright (C) 2014 The Syncthing Authors.
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program. If not, see <http://www.gnu.org/licenses/>.
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//go:generate -command genxdr go run ../../Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
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//go:generate genxdr -o truncated_xdr.go truncated.go
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package db
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import (
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"fmt"
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"github.com/syncthing/protocol"
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)
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// Used for unmarshalling a FileInfo structure but skipping the block list.
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type FileInfoTruncated struct {
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Name string // max:8192
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Flags uint32
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Modified int64
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Version int64
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LocalVersion int64
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NumBlocks int32
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}
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func (f FileInfoTruncated) String() string {
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return fmt.Sprintf("File{Name:%q, Flags:0%o, Modified:%d, Version:%d, Size:%d, NumBlocks:%d}",
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f.Name, f.Flags, f.Modified, f.Version, f.Size(), f.NumBlocks)
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}
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// Returns a statistical guess on the size, not the exact figure
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func (f FileInfoTruncated) Size() int64 {
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if f.IsDeleted() || f.IsDirectory() {
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return 128
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}
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return BlocksToSize(int(f.NumBlocks))
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}
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func (f FileInfoTruncated) IsDeleted() bool {
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return f.Flags&protocol.FlagDeleted != 0
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}
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func (f FileInfoTruncated) IsInvalid() bool {
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return f.Flags&protocol.FlagInvalid != 0
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}
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func (f FileInfoTruncated) IsDirectory() bool {
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return f.Flags&protocol.FlagDirectory != 0
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}
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func (f FileInfoTruncated) IsSymlink() bool {
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return f.Flags&protocol.FlagSymlink != 0
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}
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func (f FileInfoTruncated) HasPermissionBits() bool {
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return f.Flags&protocol.FlagNoPermBits == 0
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}
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func BlocksToSize(num int) int64 {
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if num < 2 {
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return protocol.BlockSize / 2
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}
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return int64(num-1)*protocol.BlockSize + protocol.BlockSize/2
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}
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