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Reimplement QPDF_Stream::getStreamJSON in terms of writeStreamJSON 

writeStreamJSON is a temporary implementation minimally adapted from
getStreamJSON.
This commit is contained in:
m-holger 2024-02-14 15:59:00 +00:00
parent 9589fad1e5
commit 920e929864
2 changed files with 44 additions and 12 deletions
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48
libqpdf/QPDF_Stream.cc
View File

@ -190,22 +190,44 @@ QPDF_Stream::getStreamJSON(
qpdf_stream_decode_level_e decode_level,
Pipeline* p,
std::string const& data_filename)
{
Pl_Buffer pb{"streamjson"};
JSON::Writer jw{&pb, 0};
decode_level =
writeStreamJSON(json_version, jw, json_data, decode_level, p, data_filename, true);
pb.finish();
auto result = JSON::parse(pb.getString());
if (json_data == qpdf_sj_inline) {
result.addDictionaryMember("data", JSON::makeBlob(StreamBlobProvider(this, decode_level)));
}
return result;
}
qpdf_stream_decode_level_e
QPDF_Stream::writeStreamJSON(
int json_version,
JSON::Writer& jw,
qpdf_json_stream_data_e json_data,
qpdf_stream_decode_level_e decode_level,
Pipeline* p,
std::string const& data_filename,
bool no_data_key)
{
switch (json_data) {
case qpdf_sj_none:
case qpdf_sj_inline:
if (p != nullptr) {
throw std::logic_error("QPDF_Stream::getStreamJSON: pipeline should only be supplied "
throw std::logic_error("QPDF_Stream::writeStreamJSON: pipeline should only be supplied "
"when json_data is file");
}
break;
case qpdf_sj_file:
if (p == nullptr) {
throw std::logic_error(
"QPDF_Stream::getStreamJSON: pipeline must be supplied when json_data is file");
"QPDF_Stream::writeStreamJSON: pipeline must be supplied when json_data is file");
}
if (data_filename.empty()) {
throw std::logic_error("QPDF_Stream::getStreamJSON: data_filename must be supplied "
throw std::logic_error("QPDF_Stream::writeStreamJSON: data_filename must be supplied "
"when json_data is file");
}
break;
@ -234,12 +256,13 @@ QPDF_Stream::getStreamJSON(
decode_level = qpdf_dl_none;
buf_pl.getString(); // reset buf_pl
} else {
if (json_data == qpdf_sj_file) {
buf_pl_ready = true;
}
buf_pl_ready = true;
break;
}
}
if (!buf_pl_ready) {
throw std::logic_error("QPDF_Stream: failed to get stream data");
}
// We can use unsafeShallowCopy because we are only touching top-level keys.
dict = this->stream_dict.unsafeShallowCopy();
dict.removeKey("/Length");
@ -249,19 +272,20 @@ QPDF_Stream::getStreamJSON(
}
if (json_data == qpdf_sj_file) {
result.addDictionaryMember("datafile", JSON::makeString(data_filename));
if (!buf_pl_ready) {
throw std::logic_error("QPDF_Stream: failed to get stream data in json file mode");
}
p->writeString(buf_pl.getString());
} else if (json_data == qpdf_sj_inline) {
result.addDictionaryMember(
"data", JSON::makeBlob(StreamBlobProvider(this, decode_level)));
if (!no_data_key) {
result.addDictionaryMember(
"data", JSON::makeBlob(StreamBlobProvider(this, decode_level)));
}
} else {
throw std::logic_error("QPDF_Stream: unexpected value of json_data");
}
}
result.addDictionaryMember("dict", dict.getJSON(json_version));
return result;
jw << std::move(result);
return decode_level;
}
void

8
libqpdf/qpdf/QPDF_Stream.hh
View File

@ -64,6 +64,14 @@ class QPDF_Stream: public QPDFValue
qpdf_stream_decode_level_e decode_level,
Pipeline* p,
std::string const& data_filename);
qpdf_stream_decode_level_e writeStreamJSON(
int json_version,
JSON::Writer& jw,
qpdf_json_stream_data_e json_data,
qpdf_stream_decode_level_e decode_level,
Pipeline* p,
std::string const& data_filename,
bool no_data_key = false);
void replaceDict(QPDFObjectHandle const& new_dict);