/usr/include/vlc/plugins/vlc_charset.h is in libvlccore-dev 3.0.1-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* vlc_charset.h: Unicode UTF-8 wrappers function
*****************************************************************************
* Copyright (C) 2003-2005 VLC authors and VideoLAN
* Copyright © 2005-2010 Rémi Denis-Courmont
* $Id: 05092257a4a1f09451dc1e956d07b02093908dd4 $
*
* Author: Rémi Denis-Courmont <rem # videolan,org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_CHARSET_H
#define VLC_CHARSET_H 1
/**
* \file
* Characters sets handling
*
* \ingroup strings
* @{
*/
/**
* Decodes a code point from UTF-8.
*
* Converts the first character in a UTF-8 sequence into a Unicode code point.
*
* \param str an UTF-8 bytes sequence [IN]
* \param pwc address of a location to store the code point [OUT]
*
* \return the number of bytes occupied by the decoded code point
*
* \retval (size_t)-1 not a valid UTF-8 sequence
* \retval 0 null character (i.e. str points to an empty string)
* \retval 1 (non-null) ASCII character
* \retval 2-4 non-ASCII character
*/
VLC_API size_t vlc_towc(const char *str, uint32_t *restrict pwc);
/**
* Checks UTF-8 validity.
*
* Checks whether a null-terminated string is a valid UTF-8 bytes sequence.
*
* \param str string to check
*
* \retval str the string is a valid null-terminated UTF-8 sequence
* \retval NULL the string is not an UTF-8 sequence
*/
VLC_USED static inline const char *IsUTF8(const char *str)
{
size_t n;
uint32_t cp;
while ((n = vlc_towc(str, &cp)) != 0)
if (likely(n != (size_t)-1))
str += n;
else
return NULL;
return str;
}
/**
* Removes non-UTF-8 sequences.
*
* Replaces invalid or <i>over-long</i> UTF-8 bytes sequences within a
* null-terminated string with question marks. This is so that the string can
* be printed at least partially.
*
* \warning Do not use this were correctness is critical. use IsUTF8() and
* handle the error case instead. This function is mainly for display or debug.
*
* \note Converting from Latin-1 to UTF-8 in place is not possible (the string
* size would be increased). So it is not attempted even if it would otherwise
* be less disruptive.
*
* \retval str the string is a valid null-terminated UTF-8 sequence
* (i.e. no changes were made)
* \retval NULL the string is not an UTF-8 sequence
*/
static inline char *EnsureUTF8(char *str)
{
char *ret = str;
size_t n;
uint32_t cp;
while ((n = vlc_towc(str, &cp)) != 0)
if (likely(n != (size_t)-1))
str += n;
else
{
*str++ = '?';
ret = NULL;
}
return ret;
}
/* iconv wrappers (defined in src/extras/libc.c) */
#define VLC_ICONV_ERR ((size_t) -1)
typedef void *vlc_iconv_t;
VLC_API vlc_iconv_t vlc_iconv_open( const char *, const char * ) VLC_USED;
VLC_API size_t vlc_iconv( vlc_iconv_t, const char **, size_t *, char **, size_t * ) VLC_USED;
VLC_API int vlc_iconv_close( vlc_iconv_t );
#include <stdarg.h>
VLC_API int utf8_vfprintf( FILE *stream, const char *fmt, va_list ap );
VLC_API int utf8_fprintf( FILE *, const char *, ... ) VLC_FORMAT( 2, 3 );
VLC_API char * vlc_strcasestr(const char *, const char *) VLC_USED;
VLC_API char * FromCharset( const char *charset, const void *data, size_t data_size ) VLC_USED;
VLC_API void * ToCharset( const char *charset, const char *in, size_t *outsize ) VLC_USED;
#ifdef _WIN32
VLC_USED
static inline char *FromWide (const wchar_t *wide)
{
size_t len = WideCharToMultiByte (CP_UTF8, 0, wide, -1, NULL, 0, NULL, NULL);
if (len == 0)
return NULL;
char *out = (char *)malloc (len);
if (likely(out))
WideCharToMultiByte (CP_UTF8, 0, wide, -1, out, len, NULL, NULL);
return out;
}
VLC_USED
static inline wchar_t *ToWide (const char *utf8)
{
int len = MultiByteToWideChar (CP_UTF8, 0, utf8, -1, NULL, 0);
if (len == 0)
return NULL;
wchar_t *out = (wchar_t *)malloc (len * sizeof (wchar_t));
if (likely(out))
MultiByteToWideChar (CP_UTF8, 0, utf8, -1, out, len);
return out;
}
VLC_USED VLC_MALLOC
static inline char *ToCodePage (unsigned cp, const char *utf8)
{
wchar_t *wide = ToWide (utf8);
if (wide == NULL)
return NULL;
size_t len = WideCharToMultiByte (cp, 0, wide, -1, NULL, 0, NULL, NULL);
if (len == 0) {
free(wide);
return NULL;
}
char *out = (char *)malloc (len);
if (likely(out != NULL))
WideCharToMultiByte (cp, 0, wide, -1, out, len, NULL, NULL);
free (wide);
return out;
}
VLC_USED VLC_MALLOC
static inline char *FromCodePage (unsigned cp, const char *mb)
{
int len = MultiByteToWideChar (cp, 0, mb, -1, NULL, 0);
if (len == 0)
return NULL;
wchar_t *wide = (wchar_t *)malloc (len * sizeof (wchar_t));
if (unlikely(wide == NULL))
return NULL;
MultiByteToWideChar (cp, 0, mb, -1, wide, len);
char *utf8 = FromWide (wide);
free (wide);
return utf8;
}
VLC_USED VLC_MALLOC
static inline char *FromANSI (const char *ansi)
{
return FromCodePage (GetACP (), ansi);
}
VLC_USED VLC_MALLOC
static inline char *ToANSI (const char *utf8)
{
return ToCodePage (GetACP (), utf8);
}
# ifdef UNICODE
# define FromT FromWide
# define ToT ToWide
# else
# define FromT FromANSI
# define ToT ToANSI
# endif
# define FromLocale FromANSI
# define ToLocale ToANSI
# define LocaleFree(s) free((char *)(s))
# define FromLocaleDup FromANSI
# define ToLocaleDup ToANSI
#elif defined(__OS2__)
VLC_USED static inline char *FromLocale (const char *locale)
{
return locale ? FromCharset ((char *)"", locale, strlen(locale)) : NULL;
}
VLC_USED static inline char *ToLocale (const char *utf8)
{
size_t outsize;
return utf8 ? (char *)ToCharset ("", utf8, &outsize) : NULL;
}
VLC_USED static inline void LocaleFree (const char *str)
{
free ((char *)str);
}
VLC_USED static inline char *FromLocaleDup (const char *locale)
{
return FromCharset ("", locale, strlen(locale));
}
VLC_USED static inline char *ToLocaleDup (const char *utf8)
{
size_t outsize;
return (char *)ToCharset ("", utf8, &outsize);
}
#else
# define FromLocale(l) (l)
# define ToLocale(u) (u)
# define LocaleFree(s) ((void)(s))
# define FromLocaleDup strdup
# define ToLocaleDup strdup
#endif
/**
* Converts a nul-terminated string from ISO-8859-1 to UTF-8.
*/
static inline char *FromLatin1 (const char *latin)
{
char *str = (char *)malloc (2 * strlen (latin) + 1), *utf8 = str;
unsigned char c;
if (str == NULL)
return NULL;
while ((c = *(latin++)) != '\0')
{
if (c >= 0x80)
{
*(utf8++) = 0xC0 | (c >> 6);
*(utf8++) = 0x80 | (c & 0x3F);
}
else
*(utf8++) = c;
}
*(utf8++) = '\0';
utf8 = (char *)realloc (str, utf8 - str);
return utf8 ? utf8 : str;
}
/** @} */
VLC_API double us_strtod( const char *, char ** ) VLC_USED;
VLC_API float us_strtof( const char *, char ** ) VLC_USED;
VLC_API double us_atof( const char * ) VLC_USED;
VLC_API int us_vasprintf( char **, const char *, va_list );
VLC_API int us_asprintf( char **, const char *, ... ) VLC_USED;
#endif
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