mirror of https://github.com/qpdf/qpdf.git
104 lines
1.9 KiB
C++
104 lines
1.9 KiB
C++
#include <qpdf/ClosedFileInputSource.hh>
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#include <qpdf/FileInputSource.hh>
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ClosedFileInputSource::ClosedFileInputSource(char const* filename) :
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filename(filename),
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offset(0),
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stay_open(false)
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{
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}
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ClosedFileInputSource::~ClosedFileInputSource() // NOLINT (modernize-use-equals-default)
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{
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// Must be explicit and not inline -- see QPDF_DLL_CLASS in README-maintainer
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}
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void
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ClosedFileInputSource::before()
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{
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if (nullptr == this->fis) {
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this->fis = std::make_shared<FileInputSource>(this->filename.c_str());
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this->fis->seek(this->offset, SEEK_SET);
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this->fis->setLastOffset(this->last_offset);
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}
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}
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void
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ClosedFileInputSource::after()
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{
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this->last_offset = this->fis->getLastOffset();
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this->offset = this->fis->tell();
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if (this->stay_open) {
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return;
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}
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this->fis = nullptr;
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}
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qpdf_offset_t
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ClosedFileInputSource::findAndSkipNextEOL()
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{
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before();
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qpdf_offset_t r = this->fis->findAndSkipNextEOL();
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after();
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return r;
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}
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std::string const&
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ClosedFileInputSource::getName() const
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{
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return this->filename;
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}
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qpdf_offset_t
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ClosedFileInputSource::tell()
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{
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before();
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qpdf_offset_t r = this->fis->tell();
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after();
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return r;
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}
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void
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ClosedFileInputSource::seek(qpdf_offset_t offset, int whence)
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{
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before();
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this->fis->seek(offset, whence);
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after();
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}
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void
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ClosedFileInputSource::rewind()
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{
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this->offset = 0;
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if (this->fis.get()) {
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this->fis->rewind();
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}
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}
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size_t
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ClosedFileInputSource::read(char* buffer, size_t length)
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{
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before();
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size_t r = this->fis->read(buffer, length);
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after();
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return r;
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}
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void
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ClosedFileInputSource::unreadCh(char ch)
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{
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before();
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this->fis->unreadCh(ch);
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// Don't call after -- the file has to stay open after this operation.
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}
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void
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ClosedFileInputSource::stayOpen(bool val)
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{
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this->stay_open = val;
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if ((!val) && this->fis.get()) {
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after();
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}
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}
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