#include "buffer.h"
#include "heap.h"
#include "stream.h"
#include <sewer/bmem.h>
#include <sewer/cassert.h>
#define i_SIZE(buffer) *cast(buffer, uint32_t)
#define i_DATA(buffer) cast(buffer, byte_t) + sizeof(uint32_t)
Buffer *buffer_create(const uint32_t size)
{
Buffer *buffer = cast(heap_malloc(size + sizeof32(uint32_t), "Buffer"), Buffer);
i_SIZE(buffer) = size;
return buffer;
}
Buffer *buffer_with_data(const byte_t *data, const uint32_t size)
{
Buffer *buffer = buffer_create(size);
bmem_copy(i_DATA(buffer), data, size);
return buffer;
}
Buffer *buffer_read(Stream *stream)
{
uint32_t size = stm_read_u32(stream);
Buffer *buffer = buffer_create(size);
stm_read(stream, buffer_data(buffer), size);
return buffer;
}
void buffer_destroy(Buffer **buffer)
{
cassert_no_null(buffer);
cassert_no_null(*buffer);
heap_free(dcast(buffer, byte_t), i_SIZE(*buffer) + sizeof32(uint32_t), "Buffer");
}
uint32_t buffer_size(const Buffer *buffer)
{
cassert_no_null(buffer);
return i_SIZE(buffer);
}
byte_t *buffer_data(Buffer *buffer)
{
cassert_no_null(buffer);
return i_DATA(buffer);
}
const byte_t *buffer_const(const Buffer *buffer)
{
cassert_no_null(buffer);
return i_DATA(buffer);
}
void buffer_write(Stream *stream, const Buffer *buffer)
{
cassert_no_null(buffer);
stm_write_u32(stream, i_SIZE(buffer));
stm_write(stream, i_DATA(buffer), i_SIZE(buffer));
}