1 /*****************************************************************************
2 * libc.c: Extra libc function for some systems.
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN (Centrale Réseaux) and its contributors
7 * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
25 #include <string.h> /* strdup() */
36 #if defined(HAVE_ICONV)
40 /*****************************************************************************
41 * getenv: just in case, but it should never be called
42 *****************************************************************************/
43 #if !defined( HAVE_GETENV )
44 char *vlc_getenv( const char *name )
50 /*****************************************************************************
51 * strdup: returns a malloc'd copy of a string
52 *****************************************************************************/
53 #if !defined( HAVE_STRDUP )
54 char *vlc_strdup( const char *string )
56 return strndup( string, strlen( string ) );
60 /*****************************************************************************
61 * strndup: returns a malloc'd copy of at most n bytes of string
62 * Does anyone know whether or not it will be present in Jaguar?
63 *****************************************************************************/
64 #if !defined( HAVE_STRNDUP )
65 char *vlc_strndup( const char *string, size_t n )
68 size_t len = strlen( string );
70 len = __MIN( len, n );
71 psz = (char*)malloc( len + 1 );
75 memcpy( (void*)psz, (const void*)string, len );
83 /*****************************************************************************
84 * strcasecmp: compare two strings ignoring case
85 *****************************************************************************/
86 #if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
87 int vlc_strcasecmp( const char *s1, const char *s2 )
90 if( !s1 || !s2 ) return -1;
97 if( c1 != c2 ) return (c1 < c2 ? -1 : 1);
101 if( !*s1 && !*s2 ) return 0;
102 else return (*s1 ? 1 : -1);
106 /*****************************************************************************
107 * strncasecmp: compare n chars from two strings ignoring case
108 *****************************************************************************/
109 #if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
110 int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
113 if( !s1 || !s2 ) return -1;
115 while( n > 0 && *s1 && *s2 )
120 if( c1 != c2 ) return (c1 < c2 ? -1 : 1);
124 if( !n || (!*s1 && !*s2) ) return 0;
125 else return (*s1 ? 1 : -1);
129 /******************************************************************************
130 * strcasestr: find a substring (little) in another substring (big)
131 * Case sensitive. Return NULL if not found, return big if little == null
132 *****************************************************************************/
133 #if !defined( HAVE_STRCASESTR ) && !defined( HAVE_STRISTR )
134 char * vlc_strcasestr( const char *psz_big, const char *psz_little )
136 char *p_pos = (char *)psz_big;
138 if( !psz_big || !psz_little || !*psz_little ) return p_pos;
142 if( toupper( *p_pos ) == toupper( *psz_little ) )
144 char * psz_cur1 = p_pos + 1;
145 char * psz_cur2 = (char *)psz_little + 1;
146 while( *psz_cur1 && *psz_cur2 &&
147 toupper( *psz_cur1 ) == toupper( *psz_cur2 ) )
152 if( !*psz_cur2 ) return p_pos;
160 /*****************************************************************************
162 *****************************************************************************/
163 #if !defined(HAVE_VASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
164 int vlc_vasprintf(char **strp, const char *fmt, va_list ap)
166 /* Guess we need no more than 100 bytes. */
168 char *p = malloc( i_size );
179 /* Try to print in the allocated space. */
180 n = vsnprintf( p, i_size, fmt, ap );
182 /* If that worked, return the string. */
183 if (n > -1 && n < i_size)
188 /* Else try again with more space. */
189 if (n > -1) /* glibc 2.1 */
191 i_size = n+1; /* precisely what is needed */
195 i_size *= 2; /* twice the old size */
197 if( (p = realloc( p, i_size ) ) == NULL)
206 /*****************************************************************************
208 *****************************************************************************/
209 #if !defined(HAVE_ASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
210 int vlc_asprintf( char **strp, const char *fmt, ... )
215 va_start( args, fmt );
216 i_ret = vasprintf( strp, fmt, args );
223 /*****************************************************************************
224 * atof: convert a string to a double.
225 *****************************************************************************/
226 #if !defined( HAVE_ATOF )
227 double vlc_atof( const char *nptr )
231 int i_len = strlen( nptr ) + 1;
233 psz_tmp = malloc( i_len * sizeof(wchar_t) );
234 MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
235 f_result = wcstod( psz_tmp, NULL );
242 /*****************************************************************************
243 * strtoll: convert a string to a 64 bits int.
244 *****************************************************************************/
245 #if !defined( HAVE_STRTOLL )
246 int64_t vlc_strtoll( const char *nptr, char **endptr, int base )
249 int sign = 1, newbase = base ? base : 10;
251 while( isspace(*nptr) ) nptr++;
259 /* Try to detect base */
272 if( base && newbase != base )
274 if( endptr ) *endptr = (char *)nptr;
281 while( *nptr >= '0' && *nptr <= '9' )
284 i_value += ( *nptr++ - '0' );
286 if( endptr ) *endptr = (char *)nptr;
290 while( (*nptr >= '0' && *nptr <= '9') ||
291 (*nptr >= 'a' && *nptr <= 'f') ||
292 (*nptr >= 'A' && *nptr <= 'F') )
295 if(*nptr >= '0' && *nptr <= '9') i_valc = *nptr - '0';
296 else if(*nptr >= 'a' && *nptr <= 'f') i_valc = *nptr - 'a' +10;
297 else if(*nptr >= 'A' && *nptr <= 'F') i_valc = *nptr - 'A' +10;
302 if( endptr ) *endptr = (char *)nptr;
306 i_value = strtol( nptr, endptr, newbase );
310 return i_value * sign;
314 /*****************************************************************************
315 * atoll: convert a string to a 64 bits int.
316 *****************************************************************************/
317 #if !defined( HAVE_ATOLL )
318 int64_t vlc_atoll( const char *nptr )
320 return strtoll( nptr, (char **)NULL, 10 );
324 /*****************************************************************************
325 * dgettext: gettext for plugins.
326 *****************************************************************************/
327 char *vlc_dgettext( const char *package, const char *msgid )
329 #if defined( ENABLE_NLS ) \
330 && ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
331 return dgettext( package, msgid );
333 return (char *)msgid;
337 /*****************************************************************************
338 * count_utf8_string: returns the number of characters in the string.
339 *****************************************************************************/
340 static int count_utf8_string( const char *psz_string )
342 int i = 0, i_count = 0;
343 while( psz_string[ i ] != 0 )
345 if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
351 /*****************************************************************************
352 * wraptext: inserts \n at convenient places to wrap the text.
353 * Returns the modified string in a new buffer.
354 *****************************************************************************/
355 char *vlc_wraptext( const char *psz_text, int i_line, vlc_bool_t b_utf8 )
358 char *psz_line, *psz_new_text;
360 psz_line = psz_new_text = strdup( psz_text );
363 i_len = count_utf8_string( psz_text );
365 i_len = strlen( psz_text );
367 while( i_len > i_line )
369 /* Look if there is a newline somewhere. */
370 char *psz_parser = psz_line;
372 while( i_count <= i_line && *psz_parser != '\n' )
376 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
381 if( *psz_parser == '\n' )
383 i_len -= (i_count + 1);
384 psz_line = psz_parser + 1;
388 /* Find the furthest space. */
389 while( psz_parser > psz_line && *psz_parser != ' ' )
393 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
398 if( *psz_parser == ' ' )
401 i_len -= (i_count + 1);
402 psz_line = psz_parser + 1;
406 /* Wrapping has failed. Find the first space or newline */
407 while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
411 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
416 if( i_count < i_len ) *psz_parser = '\n';
417 i_len -= (i_count + 1);
418 psz_line = psz_parser + 1;
424 /*****************************************************************************
426 *****************************************************************************/
427 vlc_iconv_t vlc_iconv_open( const char *tocode, const char *fromcode )
429 #if defined(HAVE_ICONV)
430 return iconv_open( tocode, fromcode );
436 size_t vlc_iconv( vlc_iconv_t cd, char **inbuf, size_t *inbytesleft,
437 char **outbuf, size_t *outbytesleft )
439 #if defined(HAVE_ICONV)
440 return iconv( cd, inbuf, inbytesleft, outbuf, outbytesleft );
442 int i_bytes = __MIN(*inbytesleft, *outbytesleft);
443 if( !inbuf || !outbuf || !i_bytes ) return (size_t)(-1);
444 memcpy( *outbuf, *inbuf, i_bytes );
447 inbytesleft -= i_bytes;
448 outbytesleft -= i_bytes;
453 int vlc_iconv_close( vlc_iconv_t cd )
455 #if defined(HAVE_ICONV)
456 return iconv_close( cd );
462 /*****************************************************************************
464 * (adapted from libavcodec, author Michael Niedermayer <michaelni@gmx.at>)
465 *****************************************************************************/
466 vlc_bool_t vlc_reduce( int *pi_dst_nom, int *pi_dst_den,
467 int64_t i_nom, int64_t i_den, int64_t i_max )
469 vlc_bool_t b_exact = 1, b_sign = 0;
491 i_gcd = GCD( i_nom, i_den );
495 if( i_max == 0 ) i_max = I64C(0xFFFFFFFF);
497 if( i_nom > i_max || i_den > i_max )
499 int i_a0_num = 0, i_a0_den = 1, i_a1_num = 1, i_a1_den = 0;
504 int64_t i_x = i_nom / i_den;
505 int64_t i_a2n = i_x * i_a1_num + i_a0_num;
506 int64_t i_a2d = i_x * i_a1_den + i_a0_den;
508 if( i_a2n > i_max || i_a2d > i_max ) break;
512 i_a0_num = i_a1_num; i_a0_den = i_a1_den;
513 i_a1_num = i_a2n; i_a1_den = i_a2d;
514 if( i_nom == 0 ) break;
515 i_x = i_nom; i_nom = i_den; i_den = i_x;
521 if( b_sign ) i_nom = - i_nom;
529 /*************************************************************************
530 * vlc_parse_cmdline: Command line parsing into elements.
532 * The command line is composed of space/tab separated arguments.
533 * Quotes can be used as argument delimiters and a backslash can be used to
535 *************************************************************************/
536 static void find_end_quote( char **s, char **ppsz_parser, int i_quote )
545 (*ppsz_parser)++; (*s)++;
548 else if( **s == '"' || **s == '\'' )
550 /* Preceeded by a number of '\' which we erase. */
551 *ppsz_parser -= i_bcount / 2;
554 /* '\\' followed by a '"' or '\'' */
557 (*ppsz_parser)++; (*s)++;
569 /* Different quoting */
572 (*ppsz_parser)++; (*s)++;
573 find_end_quote( s, ppsz_parser, i_quote );
575 (*ppsz_parser)++; (*s)++;
582 /* A regular character */
584 (*ppsz_parser)++; (*s)++;
590 char **vlc_parse_cmdline( const char *psz_cmdline, int *i_args )
594 char *s, *psz_parser, *psz_arg, *psz_orig;
597 if( !psz_cmdline ) return 0;
598 psz_orig = strdup( psz_cmdline );
599 psz_arg = psz_parser = s = psz_orig;
603 if( *s == '\t' || *s == ' ' )
605 /* We have a complete argument */
607 TAB_APPEND( argc, argv, strdup(psz_arg) );
609 /* Skip trailing spaces/tabs */
610 do{ s++; } while( *s == '\t' || *s == ' ' );
613 psz_arg = psz_parser = s;
616 else if( *s == '\\' )
618 *psz_parser++ = *s++;
621 else if( *s == '"' || *s == '\'' )
623 if( ( i_bcount & 1 ) == 0 )
625 /* Preceeded by an even number of '\', this is half that
626 * number of '\', plus a quote which we erase. */
628 psz_parser -= i_bcount / 2;
630 find_end_quote( &s, &psz_parser, i_quote );
635 /* Preceeded by an odd number of '\', this is half that
636 * number of '\' followed by a '"' */
637 psz_parser = psz_parser - i_bcount/2 - 1;
645 /* A regular character */
646 *psz_parser++ = *s++;
651 /* Take care of the last arg */
655 TAB_APPEND( argc, argv, strdup(psz_arg) );
658 if( i_args ) *i_args = argc;