1 /*****************************************************************************
2 * libc.c: Extra libc function for some systems.
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: libc.c,v 1.7 2003/02/08 22:20:28 massiot 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 /*****************************************************************************
131 * atof: convert a string to a double.
132 *****************************************************************************/
133 #if !defined( HAVE_ATOF )
134 double vlc_atof( const char *nptr )
138 int i_len = strlen( nptr ) + 1;
140 psz_tmp = malloc( i_len * sizeof(wchar_t) );
141 MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
142 f_result = wcstod( psz_tmp, NULL );
149 /*****************************************************************************
150 * lseek: reposition read/write file offset.
151 *****************************************************************************
152 * FIXME: this cast sucks!
153 *****************************************************************************/
154 #if !defined( HAVE_LSEEK )
155 off_t vlc_lseek( int fildes, off_t offset, int whence )
157 return SetFilePointer( (HANDLE)fildes, (long)offset, NULL, whence );
161 /*****************************************************************************
162 * dgettext: gettext for plugins.
163 *****************************************************************************/
164 char *vlc_dgettext( const char *package, const char *msgid )
166 #if defined( ENABLE_NLS ) \
167 && ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
168 return dgettext( package, msgid );
170 return (char *)msgid;
174 /*****************************************************************************
175 * wraptext: insert \n at convenient places. CAUTION: modifies its argument
176 *****************************************************************************/
177 char *vlc_wraptext( char *psz_text, size_t i_line )
179 size_t i_len = strlen(psz_text);
180 char * psz_line = psz_text;
182 while ( i_len > i_line )
184 /* Look if there is a newline somewhere. */
185 char * psz_parser = psz_line;
186 while ( psz_parser <= psz_line + i_line && *psz_parser != '\n' )
190 if ( *psz_parser == '\n' )
192 i_len -= psz_parser + 1 - psz_line;
193 psz_line = psz_parser + 1;
197 /* Find the furthest space. */
198 psz_parser = psz_line + i_line;
199 while ( psz_parser > psz_line && *psz_parser != ' ' )
203 if ( *psz_parser == ' ' )
206 i_len -= psz_parser + 1 - psz_line;
207 psz_line = psz_parser + 1;
211 /* Wrapping has failed. Find the first space or newline after i_line. */
212 psz_parser = psz_line + i_line + 1;
213 while ( psz_parser < psz_line + i_len
214 && *psz_parser != ' ' && *psz_parser != '\n' )
219 if ( psz_parser < psz_line + i_len ) *psz_parser = '\n';
220 i_len -= psz_parser + 1 - psz_line;
221 psz_line = psz_parser + 1;