octoleo/qpdf
2
1
Fork 0
mirror of https://github.com/qpdf/qpdf.git synced 2025-01-26 16:48:30 +00:00
Code Issues Releases Wiki Activity

Refactor InputSource::readLine

Browse Source
This commit is contained in:
m-holger 2024-11-02 12:12:39 +00:00
parent c502abbc98
commit fa2d331215
1 changed files with 15 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
libqpdf/InputSource.cc
View File

@ -5,6 +5,8 @@
#include <cstring>
#include <stdexcept>
using namespace std::literals;
void
InputSource::setLastOffset(qpdf_offset_t offset)
{
@ -25,19 +27,20 @@ InputSource::readLine(size_t max_line_length)
// After this is called, the file will be positioned after a line terminator or at the end of
// the file, and last_offset will point to position the file had when this method was called.
qpdf_offset_t offset = this->tell();
auto bp = std::make_unique<char[]>(max_line_length + 1);
char* buf = bp.get();
memset(buf, '\0', max_line_length + 1);
this->read(buf, max_line_length);
this->seek(offset, SEEK_SET);
qpdf_offset_t eol = this->findAndSkipNextEOL();
this->last_offset = offset;
size_t line_length = QIntC::to_size(eol - offset);
if (line_length < max_line_length) {
buf[line_length] = '\0';
auto result = read(max_line_length);
auto eol = result.find_first_of("\n\r"sv);
if (eol != std::string::npos) {
auto next_line = result.find_first_not_of("\n\r"sv, eol);
result.resize(eol);
if (eol != std::string::npos) {
seek(last_offset + static_cast<qpdf_offset_t>(next_line), SEEK_SET);
return result;
}
}
return {buf};
// We did not necessarily find the end of the trailing newline sequence.
seek(last_offset, SEEK_SET);
findAndSkipNextEOL();
return result;
}
bool