mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-16 01:27:07 +00:00
79f6b4823b
Have classes contain only a single private member of type PointerHolder<Members>. This makes it safe to change the structure of the Members class without breaking binary compatibility. Many of the classes already follow this pattern quite successfully. This brings in the rest of the class that are part of the public API.
151 lines
3.4 KiB
C++
151 lines
3.4 KiB
C++
#include <qpdf/FileInputSource.hh>
|
|
#include <string.h>
|
|
#include <qpdf/QUtil.hh>
|
|
#include <qpdf/QPDFExc.hh>
|
|
#include <algorithm>
|
|
|
|
FileInputSource::Members::Members(bool close_file) :
|
|
close_file(close_file),
|
|
file(0)
|
|
{
|
|
}
|
|
|
|
FileInputSource::Members::~Members()
|
|
{
|
|
if (this->file && this->close_file)
|
|
{
|
|
fclose(this->file);
|
|
}
|
|
}
|
|
|
|
FileInputSource::FileInputSource() :
|
|
m(new Members(false))
|
|
{
|
|
}
|
|
|
|
void
|
|
FileInputSource::setFilename(char const* filename)
|
|
{
|
|
this->m = new Members(true);
|
|
this->m->filename = filename;
|
|
this->m->file = QUtil::safe_fopen(filename, "rb");
|
|
}
|
|
|
|
void
|
|
FileInputSource::setFile(
|
|
char const* description, FILE* filep, bool close_file)
|
|
{
|
|
this->m = new Members(close_file);
|
|
this->m->filename = description;
|
|
this->m->file = filep;
|
|
this->seek(0, SEEK_SET);
|
|
}
|
|
|
|
FileInputSource::~FileInputSource()
|
|
{
|
|
}
|
|
|
|
qpdf_offset_t
|
|
FileInputSource::findAndSkipNextEOL()
|
|
{
|
|
qpdf_offset_t result = 0;
|
|
bool done = false;
|
|
char buf[10240];
|
|
while (! done)
|
|
{
|
|
qpdf_offset_t cur_offset = QUtil::tell(this->m->file);
|
|
size_t len = this->read(buf, sizeof(buf));
|
|
if (len == 0)
|
|
{
|
|
done = true;
|
|
result = this->tell();
|
|
}
|
|
else
|
|
{
|
|
char* p1 = static_cast<char*>(memchr(buf, '\r', len));
|
|
char* p2 = static_cast<char*>(memchr(buf, '\n', len));
|
|
char* p = (p1 && p2) ? std::min(p1, p2) : p1 ? p1 : p2;
|
|
if (p)
|
|
{
|
|
result = cur_offset + (p - buf);
|
|
// We found \r or \n. Keep reading until we get past
|
|
// \r and \n characters.
|
|
this->seek(result + 1, SEEK_SET);
|
|
char ch;
|
|
while (! done)
|
|
{
|
|
if (this->read(&ch, 1) == 0)
|
|
{
|
|
done = true;
|
|
}
|
|
else if (! ((ch == '\r') || (ch == '\n')))
|
|
{
|
|
this->unreadCh(ch);
|
|
done = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::string const&
|
|
FileInputSource::getName() const
|
|
{
|
|
return this->m->filename;
|
|
}
|
|
|
|
qpdf_offset_t
|
|
FileInputSource::tell()
|
|
{
|
|
return QUtil::tell(this->m->file);
|
|
}
|
|
|
|
void
|
|
FileInputSource::seek(qpdf_offset_t offset, int whence)
|
|
{
|
|
QUtil::os_wrapper(std::string("seek to ") +
|
|
this->m->filename + ", offset " +
|
|
QUtil::int_to_string(offset) + " (" +
|
|
QUtil::int_to_string(whence) + ")",
|
|
QUtil::seek(this->m->file, offset, whence));
|
|
}
|
|
|
|
void
|
|
FileInputSource::rewind()
|
|
{
|
|
::rewind(this->m->file);
|
|
}
|
|
|
|
size_t
|
|
FileInputSource::read(char* buffer, size_t length)
|
|
{
|
|
this->last_offset = this->tell();
|
|
size_t len = fread(buffer, 1, length, this->m->file);
|
|
if (len == 0)
|
|
{
|
|
if (ferror(this->m->file))
|
|
{
|
|
throw QPDFExc(qpdf_e_system,
|
|
this->m->filename, "",
|
|
this->last_offset,
|
|
std::string("read ") +
|
|
QUtil::uint_to_string(length) + " bytes");
|
|
}
|
|
else if (length > 0)
|
|
{
|
|
this->seek(0, SEEK_END);
|
|
this->last_offset = this->tell();
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
void
|
|
FileInputSource::unreadCh(char ch)
|
|
{
|
|
QUtil::os_wrapper(this->m->filename + ": unread character",
|
|
ungetc(static_cast<unsigned char>(ch), this->m->file));
|
|
}
|