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Bitstream by VideoLAN
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bitstream/dvb/si/strings.h

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/*****************************************************************************
* strings.h: ETSI EN 300 468 Strings
*****************************************************************************
* Copyright (C) 2009-2010 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* 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.
*****************************************************************************/
/*
* Normative references:
* - ETSI EN 300 468 V1.11.1 (2010-04) (SI in DVB systems)
*/
#ifndef __BITSTREAM_DVB_STRINGS_H__
#define __BITSTREAM_DVB_STRINGS_H__
#include <stdlib.h> /* malloc, free */
#include <bitstream/common.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* DVB string
*****************************************************************************/
static const char *ppsz_dvb_encodings[] = {
/* 0x00 - 0x0f */
"", "ISO_8859-5", "ISO_8859-6", "ISO_8859-7", "ISO_8859-8",
"ISO_8859-9", "ISO_8859-10", "ISO_8859-11", "", "ISO_8859-13",
"ISO_8859-14", "ISO_8859-15", "", "", "", "",
/* 0x10 - 0x1f */
"", "UTF-16", "KSC5601-1987", "GB2312", "BIG-5", "UTF-8",
"", "", "", "", "", "", "", "", "", "", NULL
};
static const char *ppsz_dvb_encodings10[] = {
"", "ISO_8859-1", "ISO_8859-2", "ISO_8859-3", "ISO_8859-4",
"ISO_8859-5", "ISO_8859-6", "ISO_8859-7", "ISO_8859-8", "ISO_8859-9",
"ISO_8859-10", "ISO_8859-11", "", "ISO_8859-13", "ISO_8859-14",
"ISO_8859-15", NULL
};
static inline const char *dvb_string_get_encoding(const uint8_t **pp_string,
size_t *pi_length)
{
uint8_t i_first;
if (!*pi_length) return NULL;
i_first = (*pp_string)[0];
if (!i_first) return NULL;
if (i_first >= 0x20) return "ISO_8859-1";
(*pp_string)++;
(*pi_length)--;
if (i_first == 0x10 && *pi_length >= 2) {
uint8_t i_second = (*pp_string)[0];
uint8_t i_third = (*pp_string)[1];
(*pp_string) += 2;
(*pi_length) -= 2;
if (i_second != 0x0 || i_third == 0 || i_third >= 0x10)
return NULL;
return ppsz_dvb_encodings10[i_third];
}
if (i_first == 0x1f && *pi_length >= 1) {
/* no info on these encodings, skip */
(*pp_string)++;
(*pi_length)--;
return NULL;
}
return ppsz_dvb_encodings[i_first];
}
static inline uint8_t *dvb_string_set(const uint8_t *p_string, size_t i_length,
const char *psz_encoding,
size_t *pi_out_length)
{
int i;
if (!strcmp(psz_encoding, "ISO_8859-9")) {
*pi_out_length = i_length;
return (uint8_t *)strdup((const char *)p_string);
}
for (i = 0; ppsz_dvb_encodings[i] != NULL; i++) {
if (!strcasecmp(psz_encoding, ppsz_dvb_encodings[i])) {
uint8_t *p_encoded = malloc(i_length + 1);
*pi_out_length = i_length + 1;
p_encoded[0] = i;
memcpy(p_encoded + 1, p_string, i_length);
return p_encoded;
}
}
for (i = 0; ppsz_dvb_encodings10[i] != NULL; i++) {
if (!strcasecmp(psz_encoding, ppsz_dvb_encodings10[i])) {
uint8_t *p_encoded = malloc(i_length + 3);
*pi_out_length = i_length + 3;
p_encoded[0] = 0x10;
p_encoded[1] = 0x0;
p_encoded[2] = i;
memcpy(p_encoded + 3, p_string, i_length);
return p_encoded;
}
}
*pi_out_length = 0;
return NULL;
}
/* simpler API because this one doesn't output to multibyte charsets */
static inline char *dvb_string_get(const uint8_t *p_string, size_t i_length,
f_iconv pf_iconv, void *iconv_opaque)
{
if (i_length) {
const char *psz_encoding = dvb_string_get_encoding(&p_string,
&i_length);
if (psz_encoding == NULL || !i_length) {
/* try one-byte charset */
char *psz_string = malloc(i_length + 1);
memcpy(psz_string, p_string, i_length);
psz_string[i_length] = '\0';
return psz_string;
}
return pf_iconv(iconv_opaque, psz_encoding,
(char *)p_string, i_length);
}
return strdup("");
}
static inline char *dvb_string_xml_escape(char *psz_input)
{
char *psz_output, *psz2;
char *psz1 = psz_input;
size_t i_output_size = 0;
while (*psz1) {
switch (*psz1) {
case '<':
case '>':
i_output_size += strlen("&lt;");
break;
case '&':
i_output_size += strlen("&amp;");
break;
case '"':
case '\'':
i_output_size += strlen("&quot;");
break;
default:
i_output_size++;
}
psz1++;
}
psz2 = psz_output = malloc(i_output_size + 1);
psz1 = psz_input;
while (*psz1) {
switch (*psz1) {
case '<':
memcpy(psz2, "&lt;", strlen("&lt;"));
psz2 += strlen("&lt;");
break;
case '>':
memcpy(psz2, "&gt;", strlen("&gt;"));
psz2 += strlen("&gt;");
break;
case '&':
memcpy(psz2, "&amp;", strlen("&amp;"));
psz2 += strlen("&amp;");
break;
case '"':
memcpy(psz2, "&quot;", strlen("&quot;"));
psz2 += strlen("&quot;");
break;
case '\'':
memcpy(psz2, "&apos;", strlen("&apos;"));
psz2 += strlen("&apos;");
break;
default:
*psz2++ = *psz1;
}
psz1++;
}
*psz2 = '\0';
free(psz_input);
return psz_output;
}
#ifdef __cplusplus
}
#endif
#endif