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#include <qpdf/assert_test.h>
#include <qpdf/Buffer.hh>
class Buffer::Members
{
friend class Buffer;
public:
Members() = default;
// Constructor for Buffers that don't own the memory.
Members(size_t size, char* buf) :
size(size),
buf(buf)
{
}
Members(std::string&& content) :
str(std::move(content)),
size(str.size()),
buf(str.data())
{
}
Members(Members const&) = delete;
~Members() = default;
private:
std::string str;
size_t size;
char* buf;
};
Buffer::Buffer() :
m(std::make_unique<Members>())
{
}
Buffer::Buffer(size_t size) :
m(std::make_unique<Members>(std::string(size, '\0')))
{
}
Buffer::Buffer(std::string&& content) :
m(std::make_unique<Members>(std::move(content)))
{
}
Buffer::Buffer(unsigned char* buf, size_t size) :
m(std::make_unique<Members>(size, reinterpret_cast<char*>(buf)))
{
}
Buffer::Buffer(std::string& content) :
m(std::make_unique<Members>(content.size(), content.data()))
{
}
Buffer::Buffer(Buffer&& rhs) noexcept :
m(std::move(rhs.m))
{
}
Buffer&
Buffer::operator=(Buffer&& rhs) noexcept
{
std::swap(m, rhs.m);
return *this;
}
Buffer::~Buffer() = default;
size_t
Buffer::getSize() const
{
return m->size;
}
unsigned char const*
Buffer::getBuffer() const
{
return reinterpret_cast<unsigned char*>(m->buf);
}
unsigned char*
Buffer::getBuffer()
{
return reinterpret_cast<unsigned char*>(m->buf);
}
Buffer
Buffer::copy() const
{
if (m->size == 0) {
return {};
}
return {std::string(m->buf, m->size)};
}
std::string
Buffer::move()
{
if (m->size == 0) {
return {};
}
if (!m->str.empty()) {
m->size = 0;
m->buf = nullptr;
return std::move(m->str);
}
return {m->buf, m->size};
}
std::string_view
Buffer::view() const
{
if (!m->buf) {
return {};
}
return {m->buf, m->size};
}
char const*
Buffer::data() const
{
return m->buf ? m->buf : m->str.data();
}
char*
Buffer::data()
{
return m->buf ? m->buf : m->str.data();
}
bool
Buffer::empty() const
{
return m->size == 0;
}
size_t
Buffer::size() const
{
return m->size;
}
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