| c732d49e |
* 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 tsms_packing.c
* @brief SMS Packing (3GPP TS 23.038 subclause 6.1.2).
*
* @author Mamadou Diop <diopmamadou(at)doubango.org>
*
*/
#include "tinysms/tsms_packing.h"
#include "tinysms/tsms_etsi_gsm_03_38.h"
#include "tsk_memory.h"
#include "tsk_string.h"
#include "tsk_debug.h"
#include <string.h> /* strlen() */
/**@defgroup tsms_packing_group SMS Packing
*/
/**@ingroup tsms_packing_group
* Converts ASCII string to GSM 7-bit characters as per 3GPP TS 23.038 v911 section 6.1.2.1.
* @param ascii Null-Terminated ascii string to convert.
* @retval Buffer containing GSM 7-bit characters if succeed and @a Null otherwise.
* @sa @ref tsms_pack_from_7bit
*/
tsk_buffer_t* tsms_pack_to_7bit(const char* ascii)
{
/* 3GPP TS 23.038 - 6.1.2.1.1 Packing of 7-bit characters
If a character number $ is noted in the following way:
b7 b6 b5 b4 b3 b2 b1
$a $b $c $d $e $f $g
The packing of the 7-bitscharacters in octets is done by completing the octets with zeros on the left.
For examples, packing: $
- one character in one octet:
- bits number:
7 6 5 4 3 2 1 0
0 1a 1b 1c 1d 1e 1f 1g
- two characters in two octets:
- bits number:
7 6 5 4 3 2 1 0
2g 1a 1b 1c 1d 1e 1f 1g
0 0 2a 2b 2c 2d 2e 2f
- three characters in three octets:
- bits number:
7 6 5 4 3 2 1 0
2g 1a 1b 1c 1d 1e 1f 1g
3f 3g 2a 2b 2c 2d 2e 2f
0 0 0 3a 3b 3c 3d 3e
- seven characters in seven octets:
- bits number:
7 6 5 4 3 2 1 0
2g 1a 1b 1c 1d 1e 1f 1g
3f 3g 2a 2b 2c 2d 2e 2f
4e 4f 4g 3a 3b 3c 3d 3e
5d 5e 5f 5g 4a 4b 4c 4d
6c 6d 6e 6f 6g 5a 5b 5c
7b 7c 7d 7e 7f 7g 6a 6b
0 0 0 0 0 0 0 7a
- eight characters in seven octets:
- bits number:
7 6 5 4 3 2 1 0
2g 1a 1b 1c 1d 1e 1f 1g
3f 3g 2a 2b 2c 2d 2e 2f
4e 4f 4g 3a 3b 3c 3d 3e
5d 5e 5f 5g 4a 4b 4c 4d
6c 6d 6e 6f 6g 5a 5b 5c
7b 7c 7d 7e 7f 7g 6a 6b
8a 8b 8c 8d 8e 8f 8g 7a
The bit number zero is always transmitted first.
Therefore, in 140 octets, it is possible to pack (140x8)/7=160 characters.
*/
tsk_buffer_t* ret = tsk_null;
uint8_t* _ret = tsk_null;
register tsk_size_t len, bcount = 1/*1-7*/, index = 0, retindex = 0, retlen = 0;
const uint8_t* pascii = (const uint8_t*)ascii;
if(!ascii || !(len = strlen(ascii))){
TSK_DEBUG_WARN("Null or Empty ascci string.");
goto bail;
}
retlen = len - (len/7) + 1;
#if HAVE_CRT //Debug memory
if(!(_ret = calloc(retlen, sizeof(uint8_t)))){
#else
if(!(_ret = tsk_calloc(retlen, sizeof(uint8_t)))){
#endif //HAVE_CRT
goto bail;
}
while(index < len){
if(index == 0){
_ret[retindex] |= (pascii[index] & (0xFF >> bcount)) |
(pascii[index+1] << (8 - bcount));
}
else{
_ret[retindex] = ((pascii[index] >> (bcount - 1))& (0xFF >> bcount))
| (pascii[index+1] <<(8-bcount));
}
/* how many bytes to use to complete on the left? */
if(++bcount == 8){
bcount = 1, ++index;
}
/* next */
retindex++;
index++;
}
/* creat ret */
ret = tsk_buffer_create(_ret, (retlen-1));
bail:
TSK_FREE(_ret);
return ret;
}
/**@ingroup tsms_packing_group
* Converts ASCII string to UCS-2(2-byte Universal Character Set) characters.
* @param ascii Null-Terminated ascii string to convert.
* @retval Buffer containing UCS-2 characters if succeed and @a Null otherwise.
* @sa @ref tsms_pack_from_ucs2
*/
tsk_buffer_t* tsms_pack_to_ucs2(const char* ascii)
{
register tsk_size_t i, j;
tsk_size_t len, retlen = 0;
uint8_t* str = tsk_null;
tsk_buffer_t* ret = tsk_null;
if(!ascii || !(len=strlen(ascii))){
TSK_DEBUG_WARN("Null or Empty gsm7bit buffer.");
goto bail;
}
#if HAVE_CRT //Debug memory
if(!(str = calloc(len, sizeof(uint8_t)*2))){
#else
if(!(str = tsk_calloc(len, sizeof(uint8_t)*2))){
#endif //HAVE_CRT
goto bail;
}
/* very bas way to do conversion ==> to be fixed */
for(i=0; i<len; i++){
for(j=0; j<TSMS_ETSI_GSM_03_38_COUNT; j++){
if((uint8_t)ascii[i] == (uint8_t)(TSMS_ETSI_GSM_03_38[j][1] & 0xFF)){
retlen++; /* 00 */
*(str + retlen++) = (TSMS_ETSI_GSM_03_38[j][0] & 0xFF);
}
}
}
/* create buffer */
ret = tsk_buffer_create(str, retlen);
bail:
TSK_FREE(str);
return ret;
}
/**@ingroup tsms_packing_group
* Converts ASCII string to 8-bit characters.
* @param ascii Null-terminated ascii string to convert.
* @retval Buffer containing 8-bit characters if succeed and @a Null otherwise.
* @sa @ref tsms_pack_from_8bit
*/
tsk_buffer_t* tsms_pack_to_8bit(const char* ascii)
{
register tsk_size_t i, j;
tsk_size_t len, retlen = 0;
uint8_t* str = tsk_null;
tsk_buffer_t* ret = tsk_null;
if(!ascii || !(len=strlen(ascii))){
TSK_DEBUG_WARN("Null or Empty gsm7bit buffer.");
goto bail;
}
#if HAVE_CRT //Debug memory
if(!(str = calloc(len, sizeof(uint8_t)))){
#else
if(!(str = tsk_calloc(len, sizeof(uint8_t)))){
#endif //HAVE_CRT
goto bail;
}
/* very bas way to do conversion ==> to be fixed */
for(i = 0; i<len; i++){
for(j = 0; j<TSMS_ETSI_GSM_03_38_COUNT; j++){
if((uint8_t)ascii[i] == (uint8_t)(TSMS_ETSI_GSM_03_38[j][1] & 0xFF)){
*(str + retlen++) = (TSMS_ETSI_GSM_03_38[j][0] & 0xFF);
continue;
}
}
}
/* create buffer */
ret = tsk_buffer_create(str, retlen);
bail:
TSK_FREE(str);
return ret;
}
/**@ingroup tsms_packing_group
* Converts GSM 7-bit characters to ASCII string.
* @param gsm7bit Buffer containing GSM 7-bit characters to convert.
* @param size The size of the buffer.
* @retval Null-terminated ASCII string, ready to be shown to the screen.
* @sa @ref tsms_pack_to_7bit
*/
char* tsms_pack_from_7bit(const void* gsm7bit, tsk_size_t size)
{
char* ret = tsk_null;
register tsk_size_t bcount = 1/*1-7*/, index = 0, retindex = 0, retsize = 0;
const uint8_t* pgsm7bit = gsm7bit;
if(!gsm7bit || !size){
TSK_DEBUG_WARN("Null or Empty gsm7bit buffer.");
goto bail;
}
// dup the gsm7bit buffer
retsize = size + (size/7) + 1; // variable used for debug
#if HAVE_CRT //Debug memory
if(!(ret = calloc(retsize, sizeof(uint8_t)))){
#else
if(!(ret = tsk_calloc(retsize, sizeof(uint8_t)))){
#endif //HAVE_CRT
goto bail;
}
while(index < size){
ret[retindex] = (pgsm7bit[index] & (0xFF >>bcount));
if(index){
ret[retindex] = (ret[retindex] << (bcount - 1))
| (pgsm7bit[index-1] >> (8 - bcount + 1));
}
/* how many bytes to use to complete on the right? */
if(bcount++ == 8){
bcount = 1, --index;
}
/* next */
index++;
retindex++;
}
/* special one */
if(!(size%7)){
ret[retindex] = pgsm7bit[size-1]>>1;
}
bail:
return ret;
}
/**@ingroup tsms_packing_group
* Converts UCS-2(2-byte Universal Character Set) characters to ASCII string.
* @param ucs2 Buffer containing UCS-2 characters to convert.
* @param size The size of the buffer.
* @retval Null-terminated ASCII string, ready to be shown to the screen.
* @sa @ref tsms_pack_to_ucs2
*/
char* tsms_pack_from_ucs2(const void* ucs2, tsk_size_t size)
{
register tsk_size_t i, j;
char* ret = tsk_null;
const uint16_t* pucs2 = ucs2;
if(!ucs2 || !size){
TSK_DEBUG_WARN("Null or Empty gsm8bit buffer.");
goto bail;
}
#if HAVE_CRT //Debug memory
if(!(ret = calloc(size+1, sizeof(uint8_t)))){
#else
if(!(ret = tsk_calloc(size+1, sizeof(uint8_t)))){
#endif //HAVE_CRT
goto bail;
}
for(i=0; i<size; i++){
for(j=0; j<TSMS_ETSI_GSM_03_38_COUNT; j++){
if(*(pucs2 + i) == (TSMS_ETSI_GSM_03_38[j][0])){
*(ret+i) = (TSMS_ETSI_GSM_03_38[j][1] & 0xFF);
continue;
}
}
}
bail:
return ret;
}
/**@ingroup tsms_packing_group
* Converts 8-bit characters to ASCII string.
* @param gsm8bit Buffer containing GSM 8-bit characters to convert.
* @param size The size of the buffer.
* @retval Null-terminated ASCII string, ready to be shown to the screen.
* @sa @ref tsms_pack_to_8bit
*/
char* tsms_pack_from_8bit(const void* gsm8bit, tsk_size_t size)
{
register tsk_size_t i, j;
char* ret = tsk_null;
const uint8_t* pgsm8bit = gsm8bit;
if(!gsm8bit || !size){
TSK_DEBUG_WARN("Null or Empty gsm8bit buffer.");
goto bail;
}
#if HAVE_CRT //Debug memory
if(!(ret = calloc(size+1, sizeof(uint8_t)))){
#else
if(!(ret = tsk_calloc(size+1, sizeof(uint8_t)))){
#endif //HAVE_CRT
goto bail;
}
/* Very bad way to do convertion ==> to be changed */
for(i=0; i<size; i++){
for(j=0; j<TSMS_ETSI_GSM_03_38_COUNT; j++){
if(*(pgsm8bit + i) == (TSMS_ETSI_GSM_03_38[j][0] & 0xFF)){
*(ret+i) = (TSMS_ETSI_GSM_03_38[j][1] & 0xFF);
continue;
}
}
}
bail:
return ret;
} |