1 /*****************************************************************************
2 * libc.c: Extra libc function for some systems.
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: libc.c,v 1.12 2004/01/08 10:27:07 fenrir 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, args );
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 /*****************************************************************************
177 * atof: convert a string to a double.
178 *****************************************************************************/
179 #if !defined( HAVE_ATOF )
180 double vlc_atof( const char *nptr )
184 int i_len = strlen( nptr ) + 1;
186 psz_tmp = malloc( i_len * sizeof(wchar_t) );
187 MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
188 f_result = wcstod( psz_tmp, NULL );
195 /*****************************************************************************
196 * atoll: convert a string to a 64 bits int.
197 *****************************************************************************/
198 #if !defined( HAVE_ATOLL )
199 int64_t vlc_atoll( const char *str )
209 while( *str >= '0' && *str <= '9' )
211 i_value = i_value * 10 + ( *str - '0' );
214 return i_value * sign;
218 /*****************************************************************************
219 * lseek: reposition read/write file offset.
220 *****************************************************************************
221 * FIXME: this cast sucks!
222 *****************************************************************************/
223 #if !defined( HAVE_LSEEK )
224 off_t vlc_lseek( int fildes, off_t offset, int whence )
226 return SetFilePointer( (HANDLE)fildes, (long)offset, NULL, whence );
230 /*****************************************************************************
231 * dgettext: gettext for plugins.
232 *****************************************************************************/
233 char *vlc_dgettext( const char *package, const char *msgid )
235 #if defined( ENABLE_NLS ) \
236 && ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
237 return dgettext( package, msgid );
239 return (char *)msgid;
243 /*****************************************************************************
244 * count_utf8_string: returns the number of characters in the string.
245 *****************************************************************************/
246 static int count_utf8_string( const char *psz_string )
248 int i = 0, i_count = 0;
249 while( psz_string[ i ] != 0 )
251 if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
257 /*****************************************************************************
258 * wraptext: inserts \n at convenient places to wrap the text.
259 * Returns the modified string in a new buffer.
260 *****************************************************************************/
261 char *vlc_wraptext( const char *psz_text, int i_line, vlc_bool_t b_utf8 )
264 char *psz_line, *psz_new_text;
266 psz_line = psz_new_text = strdup( psz_text );
269 i_len = count_utf8_string( psz_text );
271 i_len = strlen( psz_text );
273 while( i_len > i_line )
275 /* Look if there is a newline somewhere. */
276 char *psz_parser = psz_line;
278 while( i_count <= i_line && *psz_parser != '\n' )
282 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
287 if( *psz_parser == '\n' )
289 i_len -= (i_count + 1);
290 psz_line = psz_parser + 1;
294 /* Find the furthest space. */
295 while( psz_parser > psz_line && *psz_parser != ' ' )
299 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
304 if( *psz_parser == ' ' )
307 i_len -= (i_count + 1);
308 psz_line = psz_parser + 1;
312 /* Wrapping has failed. Find the first space or newline */
313 while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
317 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
322 if( i_count < i_len ) *psz_parser = '\n';
323 i_len -= (i_count + 1);
324 psz_line = psz_parser + 1;