mirror of
https://github.com/qpdf/qpdf.git
synced 2024-12-22 19:08:59 +00:00
cb769c62e5
This comment expands all tabs using an 8-character tab-width. You should ignore this commit when using git blame or use git blame -w. In the early days, I used to use tabs where possible for indentation, since emacs did this automatically. In recent years, I have switched to only using spaces, which means qpdf source code has been a mixture of spaces and tabs. I have avoided cleaning this up because of not wanting gratuitous whitespaces change to cloud the output of git blame, but I changed my mind after discussing with users who view qpdf source code in editors/IDEs that have other tab widths by default and in light of the fact that I am planning to start applying automatic code formatting soon.
117 lines
2.4 KiB
C++
117 lines
2.4 KiB
C++
#include <qpdf/Pl_ASCIIHexDecoder.hh>
|
|
|
|
#include <qpdf/QTC.hh>
|
|
#include <stdexcept>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
|
|
Pl_ASCIIHexDecoder::Pl_ASCIIHexDecoder(char const* identifier, Pipeline* next) :
|
|
Pipeline(identifier, next),
|
|
pos(0),
|
|
eod(false)
|
|
{
|
|
this->inbuf[0] = '0';
|
|
this->inbuf[1] = '0';
|
|
this->inbuf[2] = '\0';
|
|
}
|
|
|
|
Pl_ASCIIHexDecoder::~Pl_ASCIIHexDecoder()
|
|
{
|
|
}
|
|
|
|
void
|
|
Pl_ASCIIHexDecoder::write(unsigned char* buf, size_t len)
|
|
{
|
|
if (this->eod)
|
|
{
|
|
return;
|
|
}
|
|
for (size_t i = 0; i < len; ++i)
|
|
{
|
|
char ch = static_cast<char>(toupper(buf[i]));
|
|
switch (ch)
|
|
{
|
|
case ' ':
|
|
case '\f':
|
|
case '\v':
|
|
case '\t':
|
|
case '\r':
|
|
case '\n':
|
|
QTC::TC("libtests", "Pl_ASCIIHexDecoder ignore space");
|
|
// ignore whitespace
|
|
break;
|
|
|
|
case '>':
|
|
this->eod = true;
|
|
flush();
|
|
break;
|
|
|
|
default:
|
|
if (((ch >= '0') && (ch <= '9')) ||
|
|
((ch >= 'A') && (ch <= 'F')))
|
|
{
|
|
this->inbuf[this->pos++] = ch;
|
|
if (this->pos == 2)
|
|
{
|
|
flush();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
char t[2];
|
|
t[0] = ch;
|
|
t[1] = 0;
|
|
throw std::runtime_error(
|
|
std::string("character out of range"
|
|
" during base Hex decode: ") + t);
|
|
}
|
|
break;
|
|
}
|
|
if (this->eod)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
Pl_ASCIIHexDecoder::flush()
|
|
{
|
|
if (this->pos == 0)
|
|
{
|
|
QTC::TC("libtests", "Pl_ASCIIHexDecoder no-op flush");
|
|
return;
|
|
}
|
|
int b[2];
|
|
for (int i = 0; i < 2; ++i)
|
|
{
|
|
if (this->inbuf[i] >= 'A')
|
|
{
|
|
b[i] = this->inbuf[i] - 'A' + 10;
|
|
}
|
|
else
|
|
{
|
|
b[i] = this->inbuf[i] - '0';
|
|
}
|
|
}
|
|
unsigned char ch = static_cast<unsigned char>((b[0] << 4) + b[1]);
|
|
|
|
QTC::TC("libtests", "Pl_ASCIIHexDecoder partial flush",
|
|
(this->pos == 2) ? 0 : 1);
|
|
// Reset before calling getNext()->write in case that throws an
|
|
// exception.
|
|
this->pos = 0;
|
|
this->inbuf[0] = '0';
|
|
this->inbuf[1] = '0';
|
|
this->inbuf[2] = '\0';
|
|
|
|
getNext()->write(&ch, 1);
|
|
}
|
|
|
|
void
|
|
Pl_ASCIIHexDecoder::finish()
|
|
{
|
|
flush();
|
|
getNext()->finish();
|
|
}
|