Pl_QPDFTokenizer.cc
2.12 KB
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#include <qpdf/Pl_QPDFTokenizer.hh>
#include <qpdf/QTC.hh>
#include <stdexcept>
#include <string.h>
Pl_QPDFTokenizer::Members::Members() :
filter(0),
last_char_was_cr(false),
unread_char(false),
char_to_unread('\0')
{
}
Pl_QPDFTokenizer::Members::~Members()
{
}
Pl_QPDFTokenizer::Pl_QPDFTokenizer(char const* identifier,
QPDFObjectHandle::TokenFilter* filter,
Pipeline* next) :
Pipeline(identifier, next),
m(new Members)
{
m->filter = filter;
QPDFObjectHandle::TokenFilter::PipelineAccessor::setPipeline(
m->filter, next);
m->tokenizer.allowEOF();
m->tokenizer.includeIgnorable();
}
Pl_QPDFTokenizer::~Pl_QPDFTokenizer()
{
}
void
Pl_QPDFTokenizer::processChar(char ch)
{
this->m->tokenizer.presentCharacter(ch);
QPDFTokenizer::Token token;
if (this->m->tokenizer.getToken(
token, this->m->unread_char, this->m->char_to_unread))
{
this->m->filter->handleToken(token);
if ((token.getType() == QPDFTokenizer::tt_word) &&
(token.getValue() == "ID"))
{
QTC::TC("qpdf", "Pl_QPDFTokenizer found ID");
this->m->tokenizer.expectInlineImage();
}
}
}
void
Pl_QPDFTokenizer::checkUnread()
{
if (this->m->unread_char)
{
processChar(this->m->char_to_unread);
if (this->m->unread_char)
{
throw std::logic_error(
"INTERNAL ERROR: unread_char still true after processing "
"unread character");
}
}
}
void
Pl_QPDFTokenizer::write(unsigned char* buf, size_t len)
{
checkUnread();
for (size_t i = 0; i < len; ++i)
{
processChar(buf[i]);
checkUnread();
}
}
void
Pl_QPDFTokenizer::finish()
{
this->m->tokenizer.presentEOF();
QPDFTokenizer::Token token;
if (this->m->tokenizer.getToken(
token, this->m->unread_char, this->m->char_to_unread))
{
this->m->filter->handleToken(token);
}
this->m->filter->handleEOF();
QPDFObjectHandle::TokenFilter::PipelineAccessor::setPipeline(
m->filter, 0);
Pipeline* next = this->getNext(true);
if (next)
{
next->finish();
}
}