Pl_Buffer.cc
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#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.getPointer() == 0)
{
this->m->data = new 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);
PointerHolder<Buffer> b = new 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 = new Members();
return b;
}
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 = new Members();
}