mirror of https://github.com/qpdf/qpdf.git
99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
#include <qpdf/Pl_Buffer.hh>
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#include <algorithm>
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#include <stdexcept>
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#include <stdlib.h>
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#include <string.h>
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Pl_Buffer::Members::Members() :
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ready(true),
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total_size(0)
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{
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}
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Pl_Buffer::Pl_Buffer(char const* identifier, Pipeline* next) :
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Pipeline(identifier, next),
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m(new Members())
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{
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}
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Pl_Buffer::~Pl_Buffer()
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{
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// Must be explicit and not inline -- see QPDF_DLL_CLASS in
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// README-maintainer
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}
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void
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Pl_Buffer::write(unsigned char* buf, size_t len)
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{
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if (this->m->data.get() == 0) {
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this->m->data = std::make_shared<Buffer>(len);
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}
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size_t cur_size = this->m->data->getSize();
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size_t left = cur_size - this->m->total_size;
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if (left < len) {
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size_t new_size = std::max(this->m->total_size + len, 2 * cur_size);
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auto b = std::make_shared<Buffer>(new_size);
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memcpy(b->getBuffer(), this->m->data->getBuffer(), this->m->total_size);
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this->m->data = b;
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}
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if (len) {
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memcpy(this->m->data->getBuffer() + this->m->total_size, buf, len);
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this->m->total_size += len;
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}
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this->m->ready = false;
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if (getNext(true)) {
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getNext()->write(buf, len);
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}
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}
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void
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Pl_Buffer::finish()
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{
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this->m->ready = true;
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if (getNext(true)) {
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getNext()->finish();
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}
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}
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Buffer*
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Pl_Buffer::getBuffer()
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{
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if (!this->m->ready) {
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throw std::logic_error("Pl_Buffer::getBuffer() called when not ready");
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}
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Buffer* b = new Buffer(this->m->total_size);
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if (this->m->total_size > 0) {
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unsigned char* p = b->getBuffer();
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memcpy(p, this->m->data->getBuffer(), this->m->total_size);
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}
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this->m = std::shared_ptr<Members>(new Members());
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return b;
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}
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std::shared_ptr<Buffer>
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Pl_Buffer::getBufferSharedPointer()
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{
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return std::shared_ptr<Buffer>(getBuffer());
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}
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void
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Pl_Buffer::getMallocBuffer(unsigned char** buf, size_t* len)
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{
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if (!this->m->ready) {
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throw std::logic_error(
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"Pl_Buffer::getMallocBuffer() called when not ready");
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}
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*len = this->m->total_size;
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if (this->m->total_size > 0) {
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*buf = reinterpret_cast<unsigned char*>(malloc(this->m->total_size));
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memcpy(*buf, this->m->data->getBuffer(), this->m->total_size);
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} else {
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*buf = nullptr;
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}
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this->m = std::shared_ptr<Members>(new Members());
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}
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