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#include "pn_buffer.h"
#include <glib.h>
#define BUFFER_SIZE 0x1000
struct pn_buffer *
pn_buffer_new(void)
{
struct pn_buffer *buffer;
buffer = g_malloc0(sizeof(*buffer));
return buffer;
}
struct pn_buffer *
pn_buffer_new_and_alloc(size_t size)
{
struct pn_buffer *buffer;
if (size <= 0)
size = BUFFER_SIZE;
buffer = g_malloc(sizeof(*buffer));
buffer->data = buffer->alloc_data = g_malloc(size);
buffer->size = size;
buffer->len = 0;
buffer->offset = 0;
return buffer;
}
struct pn_buffer *
pn_buffer_new_use(void *data,
size_t size)
{
struct pn_buffer *buffer;
buffer = g_malloc(sizeof(*buffer));
buffer->size = buffer->len = size;
buffer->data = buffer->alloc_data = data;
buffer->offset = 0;
return buffer;
}
struct pn_buffer *
pn_buffer_new_memdup(const void *data,
size_t size)
{
return pn_buffer_new_use(g_memdup(data, size), size);
}
void
pn_buffer_free(struct pn_buffer *buffer)
{
if (!buffer)
return;
g_free(buffer->alloc_data);
g_free(buffer);
}
void
pn_buffer_resize(struct pn_buffer *buffer,
size_t new_size)
{
new_size = ((new_size / BUFFER_SIZE) + 1) * BUFFER_SIZE;
buffer->data = buffer->alloc_data = g_realloc(buffer->data, new_size);
buffer->size = new_size;
}
void
pn_buffer_prepare(struct pn_buffer *buffer,
size_t extra_size)
{
if (extra_size <= buffer->size - buffer->len)
return;
pn_buffer_resize(buffer, buffer->len + extra_size);
}
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