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Refactor Pl_Buffer

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Base implementation of the buffer on std::basic_string<unsigned char>.
This commit is contained in:
m-holger 2022-09-23 12:46:54 +01:00 committed by Jay Berkenbilt
parent ae800361fe
commit 44a7aff56f
2 changed files with 15 additions and 36 deletions
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8
include/qpdf/Pl_Buffer.hh
View File

@ -35,7 +35,6 @@
#include <qpdf/Buffer.hh>
#include <qpdf/Pipeline.hh>
#include <qpdf/PointerHolder.hh>
#include <memory>
@ -80,12 +79,11 @@ class QPDF_DLL_CLASS Pl_Buffer: public Pipeline
~Members() = default;
private:
Members();
Members() = default;
Members(Members const&) = delete;
bool ready;
std::shared_ptr<Buffer> data;
size_t total_size;
bool ready{true};
std::basic_string<unsigned char> data;
};
std::shared_ptr<Members> m;

43
libqpdf/Pl_Buffer.cc
View File

@ -5,12 +5,6 @@
#include <stdlib.h>
#include <string.h>
Pl_Buffer::Members::Members() :
ready(true),
total_size(0)
{
}
Pl_Buffer::Pl_Buffer(char const* identifier, Pipeline* next) :
Pipeline(identifier, next),
m(new Members())
@ -26,21 +20,7 @@ Pl_Buffer::~Pl_Buffer()
void
Pl_Buffer::write(unsigned char const* buf, size_t len)
{
if (this->m->data == nullptr) {
this->m->data = std::make_shared<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 = std::make_shared<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->data.append(buf, len);
this->m->ready = false;
if (getNext(true)) {
@ -64,12 +44,13 @@ Pl_Buffer::getBuffer()
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) {
auto size = this->m->data.length();
Buffer* b = new Buffer(size);
if (size > 0) {
unsigned char* p = b->getBuffer();
memcpy(p, this->m->data->getBuffer(), this->m->total_size);
memcpy(p, this->m->data.data(), size);
}
this->m = std::shared_ptr<Members>(new Members());
this->m->data.clear();
return b;
}
@ -86,13 +67,13 @@ Pl_Buffer::getMallocBuffer(unsigned char** buf, size_t* len)
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);
auto size = this->m->data.length();
*len = size;
if (size > 0) {
*buf = reinterpret_cast<unsigned char*>(malloc(size));
memcpy(*buf, this->m->data.data(), size);
} else {
*buf = nullptr;
}
this->m = std::shared_ptr<Members>(new Members());
this->m->data.clear();
}