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* Contact for licensing options: <licensing-mcpttclient(at)mcopenplatform(dot)com>
*
* The original file was part of Open Source Doubango Framework
* Copyright (C) 2010-2011 Mamadou Diop.
* Copyright (C) 2012 Doubango Telecom <http://doubango.org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tsk_buffer.c
* @brief Buffer manager.
*
* @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
*/
#include "tsk_buffer.h"
#include "tsk_memory.h"
#include "tsk_debug.h"
#if defined(_WIN32_WCE)
# include "tsk_string.h" /* tsk_strlen() */
#endif
#include <stdio.h>
#include <string.h>
/**@defgroup tsk_buffer_group Buffer management.
*/
#if defined(_MSC_VER) || TSK_UNDER_WINDOWS
# define vsnprintf _vsnprintf
#endif
/**@ingroup tsk_buffer_group
* Creates new buffer.
* @param data A pointer to the data to copy into the newly created buffer.
* @param size The size of the data to copy.
* @retval A new buffer object.
* @sa @ref tsk_buffer_create_null
*/
tsk_buffer_t* tsk_buffer_create(const void* data, tsk_size_t size)
{
return (tsk_buffer_t*)tsk_object_new(tsk_buffer_def_t, data, size);
}
/**@ingroup tsk_buffer_group
* Creates a new empty buffer.
* @retval A new empty buffer object.
* @sa tsk_buffer_create.
*/
tsk_buffer_t* tsk_buffer_create_null()
{
return tsk_buffer_create(tsk_null, 0);
}
/**@ingroup tsk_buffer_group
* Appends new data to the buffer.
* @param self The buffer to append to. The buffer should be created using @ref tsk_buffer_create or @ref tsk_buffer_create_null.
* @param format A string with embedded tag to be substituted.
* @param ... List of parameters.
* @retval Zero if succeed and non-zero error code otherwise.
* @sa @ref tsk_buffer_append.
*
* @code
* tsk_buffer_t* buffer = tsk_buffer_create_null();
* tsk_buffer_append_2(buffer, "str1=%s, c1=%c and val1=%x", "str1", 'c', 0x2554);
* printf(TSK_BUFFER_TO_STRING(buffer));
* TSK_OBJECT_SAFE_FREE(buffer);
* @endcode
*/
int tsk_buffer_append_2(tsk_buffer_t* self, const char* format, ...)
{
/*
* I suppose that sizeof(char) = 1-byte
*/
int len = 0;
va_list ap;
char *buffer;
tsk_size_t oldsize;
va_list ap2;
if(!self){
return -1;
}
oldsize = self->size;
buffer = (char*)TSK_BUFFER_DATA(self);
/* initialize variable arguments (needed for 64bit platforms where vsnprintf will change the va_list) */
va_start(ap, format);
va_start(ap2, format);
/* compute destination len for windows mobile
*/
#if defined(_WIN32_WCE)
{
int n;
len = (tsk_strlen(format)*2);
buffer = (char*)tsk_realloc(buffer, (oldsize+len));
for(;;){
if( (n = vsnprintf((char*)(buffer + oldsize), len, format, ap)) >= 0 && (n<=len) ){
len = n;
break;
}
else{
len += 10;
buffer = (char*)tsk_realloc(buffer, (oldsize+len));
}
}
}
#else
len = vsnprintf(tsk_null, 0, format, ap);
buffer = (char*)tsk_realloc(buffer, oldsize+len+1);
vsnprintf((buffer + oldsize), len
#if !defined(_MSC_VER) || defined(__GNUC__)
+1
#endif
, format, ap2);
#endif
/* reset variable arguments */
va_end(ap);
va_end(ap2);
self->data = buffer;
self->size = (oldsize+len);
return 0;
}
/**@ingroup tsk_buffer_group
* Appends data to the buffer.
* @param self The buffer to append to. The buffer should be created using @ref tsk_buffer_create or @ref tsk_buffer_create_null.
* @param data The data to append to the buffer.
* @param size The size of the @a data to append.
* @retval Zero if succeed and non-zero error code otherwise.
* @sa @ref tsk_buffer_append_2.
*
* @code
* tsk_buffer_t* buffer = tsk_buffer_create_null();
* tsk_buffer_append(buffer, "doubango", tsk_strlen("doubango"));
* printf(TSK_BUFFER_TO_STRING(buffer));
* TSK_OBJECT_SAFE_FREE(buffer);
* @endcode
*/
int tsk_buffer_append(tsk_buffer_t* self, const void* data, tsk_size_t size)
{
if(self && size){
tsk_size_t oldsize = self->size;
tsk_size_t newsize = oldsize + size;
if(oldsize){
#if HAVE_CRT //Debug memory
self->data = realloc(self->data, newsize);
#else
self->data = tsk_realloc(self->data, newsize);
#endif //HAVE_CRT
}
else{
#if HAVE_CRT //Debug memory
self->data = calloc(size, sizeof(uint8_t));
#else
self->data = tsk_calloc(size, sizeof(uint8_t));
#endif //HAVE_CRT
}
if(self->data){
if(data){
memcpy((void*)(TSK_BUFFER_TO_U8(self) + oldsize), data, size);
}
self->size = newsize;
return 0;
}
}
else{
TSK_DEBUG_ERROR("Invalid parameter");
}
return -1;
}
/**@ingroup tsk_buffer_group
* Reallocates the buffer.
* @param self The buffer to realloc.
* @param size The new size.
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsk_buffer_realloc(tsk_buffer_t* self, tsk_size_t size)
{
if(self)
{
if(size == 0){
return tsk_buffer_cleanup(self);
}
#if HAVE_CRT //Debug memory
if(self->size == 0){ // first time?
self->data = calloc(size, sizeof(uint8_t));
}
else if(self->size != size){ // only realloc if different sizes
self->data = realloc(self->data, size);
}
#else
if(self->size == 0){ // first time?
self->data = tsk_calloc(size, sizeof(uint8_t));
}
else if(self->size != size){ // only realloc if different sizes
self->data = tsk_realloc(self->data, size);
}
#endif //HAVE_CRT
self->size = size;
return 0;
}
return -1;
}
/**@ingroup tsk_buffer_group
* Removes a chunck of data from the buffer.
* @param self The buffer from which to remove the chunck.
* @param position The chunck start position.
* @param size The size of the chunck.
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsk_buffer_remove(tsk_buffer_t* self, tsk_size_t position, tsk_size_t size)
{
if(self && self->data && size){
if((position == 0) && ((position + size) >= self->size)){ /* Very common case. */
return tsk_buffer_cleanup(self);
}
else if((position + size) < self->size){
memcpy(((uint8_t*)self->data) + position, ((uint8_t*)self->data) + position + size,
self->size-(position+size));
return tsk_buffer_realloc(self, (self->size-size));
}
}
return -1;
}
/**@ingroup tsk_buffer_group
* Inserts a chunck of data into the buffer.
* @param self The buffer to insert to.
* @param position The starting position to insert to.
* @param data A pointer to the chunck to insert.
* @param size The size of the chunck.
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsk_buffer_insert(tsk_buffer_t* self, tsk_size_t position, const void* data, tsk_size_t size)
{
if(self && size)
{
int ret;
tsk_size_t tomove;
if(position > self->size){
TSK_DEBUG_ERROR("Invalid parameter");
return -2;
}
tomove = (self->size - position);
if((ret = tsk_buffer_realloc(self, (self->size + size)))){
return ret;
}
memmove(((uint8_t*)self->data) + position + size, ((uint8_t*)self->data) + position,
tomove/*self->size - (position + size)*/);
if(data){
memcpy(((uint8_t*)self->data) + position, data, size);
}
else{
memset(((uint8_t*)self->data) + position, 0, size);
}
return 0;
}
return -1;
}
int tsk_buffer_copy(tsk_buffer_t* self, tsk_size_t start, const void* data, tsk_size_t size)
{
int ret = 0;
if(!self || !data || !size){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// realloc the buffer to match the overral size
if(self->size != (start + size) && (ret = tsk_buffer_realloc(self, (start + size)))){
TSK_DEBUG_ERROR("failed to realloc the buffer");
return ret;
}
memcpy(((uint8_t*)self->data) + start, data, size);
return ret;
}
/**@ingroup tsk_buffer_group
* Cleanups the internal data and reset the size.
* @param self The buffer holding the internal data to free.
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsk_buffer_cleanup(tsk_buffer_t* self)
{
if(self && self->data){
tsk_free(&(self->data));
self->size = 0;
}
return 0;
}
/**@ingroup tsk_buffer_group
* Takes the ownership of the @a data. If the destination buffer had data, then it will
* be cleaned up.
* @param self The buffer
* @param data
* @param size
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tsk_buffer_takeownership(tsk_buffer_t* self, void** data, tsk_size_t size)
{
if(!self || !data || !*data || !size){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if(self->data){
tsk_free(&(self->data));
}
self->data = *data;
self->size = size;
*data = tsk_null;
return 0;
}
//=================================================================================================
// Buffer object definition
//
static tsk_object_t* tsk_buffer_ctor(tsk_object_t * self, va_list * app)
{
tsk_buffer_t *buffer = (tsk_buffer_t *)self;
const void *data = va_arg(*app, const void *);
tsk_size_t size = va_arg(*app, tsk_size_t);
if (size) {
#if HAVE_CRT //Debug memory
buffer->data = calloc((size+1), sizeof(uint8_t));
#else
buffer->data = tsk_calloc((size+1), sizeof(uint8_t));
#endif //HAVE_CRT
if (data) {
memcpy(buffer->data, data, size);
}
buffer->size = size;
}
return self;
}
static tsk_object_t* tsk_buffer_dtor(tsk_object_t * self)
{
tsk_buffer_t *buffer = (tsk_buffer_t *)self;
if(buffer){
TSK_FREE(buffer->data);
buffer->size = 0;
}
return self;
}
static const tsk_object_def_t tsk_buffer_def_s =
{
sizeof(tsk_buffer_t),
tsk_buffer_ctor,
tsk_buffer_dtor,
tsk_null,
};
const tsk_object_def_t *tsk_buffer_def_t = &tsk_buffer_def_s;
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