1 /*****************************************************************************
2 * libc.c: Extra libc function for some systems.
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: libc.c,v 1.16 2004/02/09 16:12:25 sigmunau Exp $
7 * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
8 * Samuel Hocevar <sam@zoy.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
24 #include <string.h> /* strdup() */
29 /*****************************************************************************
30 * getenv: just in case, but it should never be called
31 *****************************************************************************/
32 #if !defined( HAVE_GETENV )
33 char *vlc_getenv( const char *name )
39 /*****************************************************************************
40 * strdup: returns a malloc'd copy of a string
41 *****************************************************************************/
42 #if !defined( HAVE_STRDUP )
43 char *vlc_strdup( const char *string )
45 return strndup( string, strlen( string ) );
49 /*****************************************************************************
50 * strndup: returns a malloc'd copy of at most n bytes of string
51 * Does anyone know whether or not it will be present in Jaguar?
52 *****************************************************************************/
53 #if !defined( HAVE_STRNDUP )
54 char *vlc_strndup( const char *string, size_t n )
57 size_t len = strlen( string );
59 len = __MIN( len, n );
60 psz = (char*)malloc( len + 1 );
64 memcpy( (void*)psz, (const void*)string, len );
72 /*****************************************************************************
73 * strcasecmp: compare two strings ignoring case
74 *****************************************************************************/
75 #if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
76 int vlc_strcasecmp( const char *s1, const char *s2 )
80 while( !i_delta && *s1 && *s2 )
84 if( *s1 >= 'A' && *s1 <= 'Z' )
89 if( *s2 >= 'A' && *s2 <= 'Z' )
101 /*****************************************************************************
102 * strncasecmp: compare n chars from two strings ignoring case
103 *****************************************************************************/
104 #if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
105 int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
109 while( n-- && !i_delta && *s1 )
113 if( *s1 >= 'A' && *s1 <= 'Z' )
115 i_delta -= 'A' - 'a';
118 if( *s2 >= 'A' && *s2 <= 'Z' )
120 i_delta += 'A' - 'a';
130 /*****************************************************************************
132 *****************************************************************************/
133 #if !defined(HAVE_VASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
134 int vlc_vasprintf(char **strp, const char *fmt, va_list ap)
136 /* Guess we need no more than 100 bytes. */
138 char *p = malloc( i_size );
149 /* Try to print in the allocated space. */
150 n = vsnprintf( p, i_size, fmt, ap );
152 /* If that worked, return the string. */
153 if (n > -1 && n < i_size)
158 /* Else try again with more space. */
159 if (n > -1) /* glibc 2.1 */
161 i_size = n+1; /* precisely what is needed */
165 i_size *= 2; /* twice the old size */
167 if( (p = realloc( p, i_size ) ) == NULL)
176 /*****************************************************************************
178 *****************************************************************************/
179 #if !defined(HAVE_ASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
180 int vlc_asprintf( char **strp, const char *fmt, ... )
185 va_start( args, fmt );
186 i_ret = vasprintf( strp, fmt, args );
193 /*****************************************************************************
194 * atof: convert a string to a double.
195 *****************************************************************************/
196 #if !defined( HAVE_ATOF )
197 double vlc_atof( const char *nptr )
201 int i_len = strlen( nptr ) + 1;
203 psz_tmp = malloc( i_len * sizeof(wchar_t) );
204 MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
205 f_result = wcstod( psz_tmp, NULL );
212 /*****************************************************************************
213 * atoll: convert a string to a 64 bits int.
214 *****************************************************************************/
215 #if !defined( HAVE_ATOLL )
216 int64_t vlc_atoll( const char *str )
226 while( *str >= '0' && *str <= '9' )
228 i_value = i_value * 10 + ( *str++ - '0' );
231 return i_value * sign;
235 /*****************************************************************************
236 * lseek: reposition read/write file offset.
237 *****************************************************************************
238 * FIXME: this cast sucks!
239 *****************************************************************************/
240 #if !defined( HAVE_LSEEK )
241 off_t vlc_lseek( int fildes, off_t offset, int whence )
243 return SetFilePointer( (HANDLE)fildes, (long)offset, NULL, whence );
247 /*****************************************************************************
248 * dgettext: gettext for plugins.
249 *****************************************************************************/
250 char *vlc_dgettext( const char *package, const char *msgid )
252 #if defined( ENABLE_NLS ) \
253 && ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
254 return dgettext( package, msgid );
256 return (char *)msgid;
260 /*****************************************************************************
261 * count_utf8_string: returns the number of characters in the string.
262 *****************************************************************************/
263 static int count_utf8_string( const char *psz_string )
265 int i = 0, i_count = 0;
266 while( psz_string[ i ] != 0 )
268 if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
274 /*****************************************************************************
275 * wraptext: inserts \n at convenient places to wrap the text.
276 * Returns the modified string in a new buffer.
277 *****************************************************************************/
278 char *vlc_wraptext( const char *psz_text, int i_line, vlc_bool_t b_utf8 )
281 char *psz_line, *psz_new_text;
283 psz_line = psz_new_text = strdup( psz_text );
286 i_len = count_utf8_string( psz_text );
288 i_len = strlen( psz_text );
290 while( i_len > i_line )
292 /* Look if there is a newline somewhere. */
293 char *psz_parser = psz_line;
295 while( i_count <= i_line && *psz_parser != '\n' )
299 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
304 if( *psz_parser == '\n' )
306 i_len -= (i_count + 1);
307 psz_line = psz_parser + 1;
311 /* Find the furthest space. */
312 while( psz_parser > psz_line && *psz_parser != ' ' )
316 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
321 if( *psz_parser == ' ' )
324 i_len -= (i_count + 1);
325 psz_line = psz_parser + 1;
329 /* Wrapping has failed. Find the first space or newline */
330 while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
334 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
339 if( i_count < i_len ) *psz_parser = '\n';
340 i_len -= (i_count + 1);
341 psz_line = psz_parser + 1;