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.
113 lines
2.3 KiB
C++
113 lines
2.3 KiB
C++
#include <qpdf/Pl_Buffer.hh>
|
|
|
|
#include <stdexcept>
|
|
#include <algorithm>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
Pl_Buffer::Members::Members() :
|
|
ready(true),
|
|
total_size(0)
|
|
{
|
|
}
|
|
|
|
Pl_Buffer::Members::~Members()
|
|
{
|
|
}
|
|
|
|
Pl_Buffer::Pl_Buffer(char const* identifier, Pipeline* next) :
|
|
Pipeline(identifier, next),
|
|
m(new Members())
|
|
{
|
|
}
|
|
|
|
Pl_Buffer::~Pl_Buffer()
|
|
{
|
|
}
|
|
|
|
void
|
|
Pl_Buffer::write(unsigned char* buf, size_t len)
|
|
{
|
|
if (this->m->data.get() == 0)
|
|
{
|
|
this->m->data = make_pointer_holder<Buffer>(len);
|
|
}
|
|
size_t cur_size = this->m->data->getSize();
|
|
size_t left = cur_size - this->m->total_size;
|
|
if (left < len)
|
|
{
|
|
size_t new_size = std::max(this->m->total_size + len, 2 * cur_size);
|
|
auto b = make_pointer_holder<Buffer>(new_size);
|
|
memcpy(b->getBuffer(), this->m->data->getBuffer(), this->m->total_size);
|
|
this->m->data = b;
|
|
}
|
|
if (len)
|
|
{
|
|
memcpy(this->m->data->getBuffer() + this->m->total_size, buf, len);
|
|
this->m->total_size += len;
|
|
}
|
|
this->m->ready = false;
|
|
|
|
if (getNext(true))
|
|
{
|
|
getNext()->write(buf, len);
|
|
}
|
|
}
|
|
|
|
void
|
|
Pl_Buffer::finish()
|
|
{
|
|
this->m->ready = true;
|
|
if (getNext(true))
|
|
{
|
|
getNext()->finish();
|
|
}
|
|
}
|
|
|
|
Buffer*
|
|
Pl_Buffer::getBuffer()
|
|
{
|
|
if (! this->m->ready)
|
|
{
|
|
throw std::logic_error("Pl_Buffer::getBuffer() called when not ready");
|
|
}
|
|
|
|
Buffer* b = new Buffer(this->m->total_size);
|
|
if (this->m->total_size > 0)
|
|
{
|
|
unsigned char* p = b->getBuffer();
|
|
memcpy(p, this->m->data->getBuffer(), this->m->total_size);
|
|
}
|
|
this->m = PointerHolder<Members>(new Members());
|
|
return b;
|
|
}
|
|
|
|
PointerHolder<Buffer>
|
|
Pl_Buffer::getBufferSharedPointer()
|
|
{
|
|
return PointerHolder<Buffer>(getBuffer());
|
|
}
|
|
|
|
void
|
|
Pl_Buffer::getMallocBuffer(unsigned char **buf, size_t* len)
|
|
{
|
|
if (! this->m->ready)
|
|
{
|
|
throw std::logic_error(
|
|
"Pl_Buffer::getMallocBuffer() called when not ready");
|
|
}
|
|
|
|
*len = this->m->total_size;
|
|
if (this->m->total_size > 0)
|
|
{
|
|
*buf = reinterpret_cast<unsigned char*>(malloc(this->m->total_size));
|
|
memcpy(*buf, this->m->data->getBuffer(), this->m->total_size);
|
|
}
|
|
else
|
|
{
|
|
*buf = nullptr;
|
|
}
|
|
this->m = PointerHolder<Members>(new Members());
|
|
}
|