141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
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*
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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*
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* The Initial Developer of the Original Code is
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* Anthony Minessale II <anthmct@yahoo.com>
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* Portions created by the Initial Developer are Copyright (C)
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Anthony Minessale II <anthmct@yahoo.com>
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*
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*
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* switch_buffer.c -- Data Buffering Code
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*
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*/
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#include <switch_buffer.h>
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struct switch_buffer {
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unsigned char *data;
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size_t used;
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size_t datalen;
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};
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SWITCH_DECLARE(switch_status) switch_buffer_create(switch_memory_pool *pool, switch_buffer **buffer, size_t max_len)
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{
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switch_buffer *new_buffer;
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if ((new_buffer = switch_core_alloc(pool, sizeof(switch_buffer))) && (new_buffer->data = switch_core_alloc(pool, max_len))) {
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new_buffer->datalen = max_len;
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*buffer = new_buffer;
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return SWITCH_STATUS_SUCCESS;
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}
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return SWITCH_STATUS_MEMERR;
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}
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SWITCH_DECLARE(int) switch_buffer_len(switch_buffer *buffer)
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{
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assert(buffer != NULL);
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return (int)buffer->datalen;
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}
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SWITCH_DECLARE(int) switch_buffer_freespace(switch_buffer *buffer)
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{
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assert(buffer != NULL);
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return (int)(buffer->datalen - buffer->used);
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}
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SWITCH_DECLARE(int) switch_buffer_inuse(switch_buffer *buffer)
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{
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assert(buffer != NULL);
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return (int)buffer->used;
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}
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SWITCH_DECLARE(int) switch_buffer_toss(switch_buffer *buffer, size_t datalen)
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{
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size_t reading = 0;
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assert(buffer != NULL);
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if (buffer->used < 1) {
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buffer->used = 0;
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return 0;
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} else if (buffer->used >= datalen) {
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reading = datalen;
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} else {
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reading = buffer->used;
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}
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memmove(buffer->data, buffer->data + reading, buffer->datalen - reading);
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buffer->used -= datalen;
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return (int)buffer->datalen;
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}
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SWITCH_DECLARE(int) switch_buffer_read(switch_buffer *buffer, void *data, size_t datalen)
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{
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size_t reading = 0;
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assert(buffer != NULL);
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assert(data != NULL);
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if (buffer->used < 1) {
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buffer->used = 0;
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return 0;
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} else if (buffer->used >= datalen) {
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reading = datalen;
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} else {
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reading = buffer->used;
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}
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memcpy(data, buffer->data, reading);
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memmove(buffer->data, buffer->data + reading, buffer->datalen - reading);
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buffer->used -= reading;
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//printf("o %d = %d\n", reading, buffer->used);
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return (int)reading;
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}
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SWITCH_DECLARE(int) switch_buffer_write(switch_buffer *buffer, void *data, size_t datalen)
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{
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size_t freespace;
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assert(buffer != NULL);
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assert(data != NULL);
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assert(buffer->data != NULL);
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freespace = buffer->datalen - buffer->used;
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if (freespace < datalen) {
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return 0;
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} else {
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memcpy(buffer->data + buffer->used, data, datalen);
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buffer->used += datalen;
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}
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//printf("i %d = %d\n", datalen, buffer->used);
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return (int)buffer->used;
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}
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