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#include <qpdf/Pl_Buffer.hh>
#include <stdexcept>
#include <assert.h>
#include <string.h>
Pl_Buffer::Pl_Buffer(char const* identifier, Pipeline* next) :
Pipeline(identifier, next),
ready(false),
total_size(0)
{
}
Pl_Buffer::~Pl_Buffer()
{
}
void
Pl_Buffer::write(unsigned char* buf, size_t len)
{
Buffer* b = new Buffer(len);
memcpy(b->getBuffer(), buf, len);
this->data.push_back(b);
this->ready = false;
this->total_size += len;
if (getNext(true))
{
getNext()->write(buf, len);
}
}
void
Pl_Buffer::finish()
{
this->ready = true;
if (getNext(true))
{
getNext()->finish();
}
}
Buffer*
Pl_Buffer::getBuffer()
{
if (! this->ready)
{
throw std::logic_error("Pl_Buffer::getBuffer() called when not ready");
}
Buffer* b = new Buffer(this->total_size);
unsigned char* p = b->getBuffer();
while (! this->data.empty())
{
PointerHolder<Buffer> bp = this->data.front();
this->data.pop_front();
size_t bytes = bp->getSize();
memcpy(p, bp->getBuffer(), bytes);
p += bytes;
this->total_size -= bytes;
}
assert(this->total_size == 0);
this->ready = false;
return b;
}
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