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#include "libfilezilla/nonowning_buffer.hpp"
#include <string.h>
namespace fz {
void nonowning_buffer::resize(size_t size)
{
if (!size) {
start_ = 0;
}
else if (size > capacity_) {
abort();
}
else if (size > capacity_ - start_) {
// If here, size_ is less than size
memmove(buffer_, buffer_ + start_, size_);
start_ = 0;
}
size_ = size;
}
uint8_t* nonowning_buffer::get(size_t bytes)
{
if (capacity_ - size_ < bytes) {
abort();
}
else if (capacity_ - size_ < bytes + start_) {
memmove(buffer_, buffer_ + start_, size_);
start_ = 0;
}
return buffer_ + start_ + size_;
}
void nonowning_buffer::add(size_t bytes)
{
if (capacity_ - start_ - size_ < bytes) {
abort();
}
size_ += bytes;
}
void nonowning_buffer::consume(size_t bytes)
{
if (bytes > size_) {
bytes = size_;
}
size_ -= bytes;
if (!size_) {
start_ = 0;
}
else {
start_ += bytes;
}
}
void nonowning_buffer::reset()
{
buffer_ = nullptr;
capacity_ = 0;
size_ = 0;
start_ = 0;
}
void nonowning_buffer::append(uint8_t const* data, size_t len)
{
if (data && len) {
memcpy(get(len), data, len);
size_ += len;
}
}
std::string_view nonowning_buffer::to_view() const
{
return std::string_view(reinterpret_cast<char const*>(get()), size());
}
void nonowning_buffer::append(std::string_view const& str)
{
return append(reinterpret_cast<uint8_t const*>(str.data()), str.size());
}
}
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