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/*****************************************************************************
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* libc.c: Extra libc function for some systems.
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*****************************************************************************
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* Copyright (C) 2002 VideoLAN
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* $Id: libc.c 6961 2004-03-05 17:34:23Z sam $
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* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
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* Samuel Hocevar <sam@zoy.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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#include <string.h> /* strdup() */
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/*****************************************************************************
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* getenv: just in case, but it should never be called
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*****************************************************************************/
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#if !defined( HAVE_GETENV )
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char *vlc_getenv( const char *name )
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/*****************************************************************************
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* strdup: returns a malloc'd copy of a string
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*****************************************************************************/
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#if !defined( HAVE_STRDUP )
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char *vlc_strdup( const char *string )
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return strndup( string, strlen( string ) );
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/*****************************************************************************
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* strndup: returns a malloc'd copy of at most n bytes of string
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* Does anyone know whether or not it will be present in Jaguar?
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*****************************************************************************/
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#if !defined( HAVE_STRNDUP )
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char *vlc_strndup( const char *string, size_t n )
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size_t len = strlen( string );
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len = __MIN( len, n );
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psz = (char*)malloc( len + 1 );
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memcpy( (void*)psz, (const void*)string, len );
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/*****************************************************************************
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* strcasecmp: compare two strings ignoring case
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*****************************************************************************/
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#if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
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int vlc_strcasecmp( const char *s1, const char *s2 )
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while( !i_delta && *s1 && *s2 )
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if( *s1 >= 'A' && *s1 <= 'Z' )
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if( *s2 >= 'A' && *s2 <= 'Z' )
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/*****************************************************************************
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* strncasecmp: compare n chars from two strings ignoring case
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*****************************************************************************/
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#if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
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int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
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while( n-- && !i_delta && *s1 )
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if( *s1 >= 'A' && *s1 <= 'Z' )
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i_delta -= 'A' - 'a';
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if( *s2 >= 'A' && *s2 <= 'Z' )
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i_delta += 'A' - 'a';
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/*****************************************************************************
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*****************************************************************************/
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#if !defined(HAVE_VASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
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int vlc_vasprintf(char **strp, const char *fmt, va_list ap)
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/* Guess we need no more than 100 bytes. */
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char *p = malloc( i_size );
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/* Try to print in the allocated space. */
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n = vsnprintf( p, i_size, fmt, ap );
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/* If that worked, return the string. */
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if (n > -1 && n < i_size)
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/* Else try again with more space. */
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if (n > -1) /* glibc 2.1 */
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i_size = n+1; /* precisely what is needed */
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i_size *= 2; /* twice the old size */
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if( (p = realloc( p, i_size ) ) == NULL)
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/*****************************************************************************
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*****************************************************************************/
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#if !defined(HAVE_ASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
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int vlc_asprintf( char **strp, const char *fmt, ... )
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va_start( args, fmt );
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i_ret = vasprintf( strp, fmt, args );
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/*****************************************************************************
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* atof: convert a string to a double.
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*****************************************************************************/
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#if !defined( HAVE_ATOF )
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double vlc_atof( const char *nptr )
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int i_len = strlen( nptr ) + 1;
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psz_tmp = malloc( i_len * sizeof(wchar_t) );
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MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
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f_result = wcstod( psz_tmp, NULL );
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/*****************************************************************************
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* atoll: convert a string to a 64 bits int.
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*****************************************************************************/
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#if !defined( HAVE_ATOLL )
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int64_t vlc_atoll( const char *str )
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while( *str >= '0' && *str <= '9' )
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i_value = i_value * 10 + ( *str++ - '0' );
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return i_value * sign;
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/*****************************************************************************
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* lseek: reposition read/write file offset.
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*****************************************************************************
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* FIXME: this cast sucks!
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*****************************************************************************/
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#if !defined( HAVE_LSEEK )
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off_t vlc_lseek( int fildes, off_t offset, int whence )
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return SetFilePointer( (HANDLE)fildes, (long)offset, NULL, whence );
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/*****************************************************************************
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* dgettext: gettext for plugins.
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*****************************************************************************/
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char *vlc_dgettext( const char *package, const char *msgid )
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#if defined( ENABLE_NLS ) \
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&& ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
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return dgettext( package, msgid );
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return (char *)msgid;
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/*****************************************************************************
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* count_utf8_string: returns the number of characters in the string.
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*****************************************************************************/
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static int count_utf8_string( const char *psz_string )
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int i = 0, i_count = 0;
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while( psz_string[ i ] != 0 )
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if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
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/*****************************************************************************
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* wraptext: inserts \n at convenient places to wrap the text.
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* Returns the modified string in a new buffer.
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*****************************************************************************/
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char *vlc_wraptext( const char *psz_text, int i_line, vlc_bool_t b_utf8 )
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char *psz_line, *psz_new_text;
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psz_line = psz_new_text = strdup( psz_text );
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i_len = count_utf8_string( psz_text );
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i_len = strlen( psz_text );
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while( i_len > i_line )
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/* Look if there is a newline somewhere. */
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char *psz_parser = psz_line;
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while( i_count <= i_line && *psz_parser != '\n' )
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while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
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if( *psz_parser == '\n' )
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i_len -= (i_count + 1);
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psz_line = psz_parser + 1;
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/* Find the furthest space. */
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while( psz_parser > psz_line && *psz_parser != ' ' )
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while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
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if( *psz_parser == ' ' )
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i_len -= (i_count + 1);
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psz_line = psz_parser + 1;
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/* Wrapping has failed. Find the first space or newline */
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while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
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while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
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if( i_count < i_len ) *psz_parser = '\n';
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i_len -= (i_count + 1);
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psz_line = psz_parser + 1;