140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
/*
|
|
* Spdylay - SPDY Library
|
|
*
|
|
* Copyright (c) 2012 Tatsuhiro Tsujikawa
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#include "spdylay_buffer.h"
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
void spdylay_buffer_init(spdylay_buffer *buffer, size_t chunk_capacity)
|
|
{
|
|
spdylay_queue_init(&buffer->q);
|
|
buffer->capacity = chunk_capacity;
|
|
buffer->len = 0;
|
|
/*
|
|
* Set last_offset to maximum so that first append adds new buffer
|
|
* buffer.
|
|
*/
|
|
buffer->last_offset = buffer->capacity;
|
|
}
|
|
|
|
void spdylay_buffer_free(spdylay_buffer *buffer)
|
|
{
|
|
while(!spdylay_queue_empty(&buffer->q)) {
|
|
free(spdylay_queue_front(&buffer->q));
|
|
spdylay_queue_pop(&buffer->q);
|
|
}
|
|
}
|
|
|
|
int spdylay_buffer_alloc(spdylay_buffer *buffer)
|
|
{
|
|
int r;
|
|
uint8_t *buf = (uint8_t*)malloc(buffer->capacity);
|
|
if(buf == NULL) {
|
|
return SPDYLAY_ERR_NOMEM;
|
|
}
|
|
if((r = spdylay_queue_push(&buffer->q, buf)) != 0) {
|
|
free(buf);
|
|
return r;
|
|
}
|
|
buffer->len += buffer->capacity-buffer->last_offset;
|
|
buffer->last_offset = 0;
|
|
return 0;
|
|
}
|
|
|
|
uint8_t* spdylay_buffer_get(spdylay_buffer *buffer)
|
|
{
|
|
if(spdylay_queue_empty(&buffer->q)) {
|
|
return NULL;
|
|
} else {
|
|
return spdylay_queue_back(&buffer->q)+buffer->last_offset;
|
|
}
|
|
}
|
|
|
|
size_t spdylay_buffer_avail(spdylay_buffer *buffer)
|
|
{
|
|
return buffer->capacity-buffer->last_offset;
|
|
}
|
|
|
|
void spdylay_buffer_advance(spdylay_buffer *buffer, size_t amount)
|
|
{
|
|
buffer->last_offset += amount;
|
|
buffer->len += amount;
|
|
assert(buffer->last_offset <= buffer->capacity);
|
|
}
|
|
|
|
size_t spdylay_buffer_length(spdylay_buffer *buffer)
|
|
{
|
|
return buffer->len;
|
|
}
|
|
|
|
size_t spdylay_buffer_front_length(spdylay_buffer *buffer)
|
|
{
|
|
if(spdylay_queue_empty(&buffer->q)) {
|
|
return 0;
|
|
} else if(buffer->len >= buffer->capacity) {
|
|
return buffer->capacity;
|
|
} else {
|
|
return buffer->len;
|
|
}
|
|
}
|
|
|
|
uint8_t* spdylay_buffer_front_data(spdylay_buffer *buffer)
|
|
{
|
|
if(spdylay_queue_empty(&buffer->q)) {
|
|
return NULL;
|
|
} else {
|
|
return spdylay_queue_front(&buffer->q);
|
|
}
|
|
}
|
|
|
|
void spdylay_buffer_pop(spdylay_buffer *buffer)
|
|
{
|
|
if(!spdylay_queue_empty(&buffer->q)) {
|
|
if(buffer->len >= buffer->capacity) {
|
|
buffer->len -= buffer->capacity;
|
|
} else {
|
|
buffer->len = 0;
|
|
buffer->last_offset = buffer->capacity;
|
|
}
|
|
free(spdylay_queue_front(&buffer->q));
|
|
spdylay_queue_pop(&buffer->q);
|
|
}
|
|
}
|
|
|
|
size_t spdylay_buffer_capacity(spdylay_buffer *buffer)
|
|
{
|
|
return buffer->capacity;
|
|
}
|
|
|
|
void spdylay_buffer_serialize(spdylay_buffer *buffer, uint8_t *buf)
|
|
{
|
|
while(spdylay_buffer_length(buffer)) {
|
|
size_t len = spdylay_buffer_front_length(buffer);
|
|
memcpy(buf, spdylay_buffer_front_data(buffer), len);
|
|
buf += len;
|
|
spdylay_buffer_pop(buffer);
|
|
}
|
|
}
|