* libc.c: Extra libc function for some systems.
*****************************************************************************
* Copyright (C) 2002 VideoLAN
- * $Id: libc.c,v 1.6 2002/12/30 13:34:03 sam Exp $
+ * $Id$
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
* Samuel Hocevar <sam@zoy.org>
#include <vlc/vlc.h>
+#undef iconv_t
+#undef iconv_open
+#undef iconv
+#undef iconv_close
+
+#if defined(HAVE_ICONV)
+# include <iconv.h>
+#endif
+
/*****************************************************************************
* getenv: just in case, but it should never be called
*****************************************************************************/
}
#endif
+/******************************************************************************
+ * strcasestr: find a substring (little) in another substring (big)
+ * Case sensitive. Return NULL if not found, return big if little == null
+ *****************************************************************************/
+#if !defined( HAVE_STRCASESTR ) && !defined( HAVE_STRISTR )
+char * vlc_strcasestr( const char *psz_big, const char *psz_little )
+{
+ char *p_pos = psz_big;
+
+ if( !psz_big || !psz_little || !*psz_little ) return psz_big;
+
+ while( *p_pos )
+ {
+ if( toupper( *p_pos ) == toupper( *psz_little ) )
+ {
+ char * psz_cur1 = p_pos + 1;
+ char * psz_cur2 = psz_little + 1;
+ while( *psz_cur1 && *psz_cur2 &&
+ toupper( *psz_cur1 ) == toupper( *psz_cur2 ) )
+ {
+ psz_cur1++;
+ psz_cur2++;
+ }
+ if( !*psz_cur2 ) return p_pos;
+ }
+ p_pos++;
+ }
+ return NULL;
+}
+#endif
+
+/*****************************************************************************
+ * vasprintf:
+ *****************************************************************************/
+#if !defined(HAVE_VASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
+int vlc_vasprintf(char **strp, const char *fmt, va_list ap)
+{
+ /* Guess we need no more than 100 bytes. */
+ int i_size = 100;
+ char *p = malloc( i_size );
+ int n;
+
+ if( p == NULL )
+ {
+ *strp = NULL;
+ return -1;
+ }
+
+ for( ;; )
+ {
+ /* Try to print in the allocated space. */
+ n = vsnprintf( p, i_size, fmt, ap );
+
+ /* If that worked, return the string. */
+ if (n > -1 && n < i_size)
+ {
+ *strp = p;
+ return strlen( p );
+ }
+ /* Else try again with more space. */
+ if (n > -1) /* glibc 2.1 */
+ {
+ i_size = n+1; /* precisely what is needed */
+ }
+ else /* glibc 2.0 */
+ {
+ i_size *= 2; /* twice the old size */
+ }
+ if( (p = realloc( p, i_size ) ) == NULL)
+ {
+ *strp = NULL;
+ return -1;
+ }
+ }
+}
+#endif
+
+/*****************************************************************************
+ * asprintf:
+ *****************************************************************************/
+#if !defined(HAVE_ASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
+int vlc_asprintf( char **strp, const char *fmt, ... )
+{
+ va_list args;
+ int i_ret;
+
+ va_start( args, fmt );
+ i_ret = vasprintf( strp, fmt, args );
+ va_end( args );
+
+ return i_ret;
+}
+#endif
+
/*****************************************************************************
* atof: convert a string to a double.
*****************************************************************************/
}
#endif
+/*****************************************************************************
+ * atoll: convert a string to a 64 bits int.
+ *****************************************************************************/
+#if !defined( HAVE_ATOLL )
+int64_t vlc_atoll( const char *str )
+{
+ int64_t i_value = 0;
+ int sign = 1;
+
+ if( *str == '-' )
+ {
+ sign = -1;
+ }
+
+ while( *str >= '0' && *str <= '9' )
+ {
+ i_value = i_value * 10 + ( *str++ - '0' );
+ }
+
+ return i_value * sign;
+}
+#endif
+
/*****************************************************************************
* lseek: reposition read/write file offset.
*****************************************************************************
#endif
}
+/*****************************************************************************
+ * count_utf8_string: returns the number of characters in the string.
+ *****************************************************************************/
+static int count_utf8_string( const char *psz_string )
+{
+ int i = 0, i_count = 0;
+ while( psz_string[ i ] != 0 )
+ {
+ if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
+ i++;
+ }
+ return i_count;
+}
+
+/*****************************************************************************
+ * wraptext: inserts \n at convenient places to wrap the text.
+ * Returns the modified string in a new buffer.
+ *****************************************************************************/
+char *vlc_wraptext( const char *psz_text, int i_line, vlc_bool_t b_utf8 )
+{
+ int i_len;
+ char *psz_line, *psz_new_text;
+
+ psz_line = psz_new_text = strdup( psz_text );
+
+ if( b_utf8 )
+ i_len = count_utf8_string( psz_text );
+ else
+ i_len = strlen( psz_text );
+
+ while( i_len > i_line )
+ {
+ /* Look if there is a newline somewhere. */
+ char *psz_parser = psz_line;
+ int i_count = 0;
+ while( i_count <= i_line && *psz_parser != '\n' )
+ {
+ if( b_utf8 )
+ {
+ while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
+ }
+ psz_parser++;
+ i_count++;
+ }
+ if( *psz_parser == '\n' )
+ {
+ i_len -= (i_count + 1);
+ psz_line = psz_parser + 1;
+ continue;
+ }
+
+ /* Find the furthest space. */
+ while( psz_parser > psz_line && *psz_parser != ' ' )
+ {
+ if( b_utf8 )
+ {
+ while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
+ }
+ psz_parser--;
+ i_count--;
+ }
+ if( *psz_parser == ' ' )
+ {
+ *psz_parser = '\n';
+ i_len -= (i_count + 1);
+ psz_line = psz_parser + 1;
+ continue;
+ }
+
+ /* Wrapping has failed. Find the first space or newline */
+ while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
+ {
+ if( b_utf8 )
+ {
+ while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
+ }
+ psz_parser++;
+ i_count++;
+ }
+ if( i_count < i_len ) *psz_parser = '\n';
+ i_len -= (i_count + 1);
+ psz_line = psz_parser + 1;
+ }
+
+ return psz_new_text;
+}
+
+/*****************************************************************************
+ * iconv wrapper
+ *****************************************************************************/
+vlc_iconv_t vlc_iconv_open( const char *tocode, const char *fromcode )
+{
+#if defined(HAVE_ICONV)
+ return iconv_open( tocode, fromcode );
+#else
+ return NULL;
+#endif
+}
+
+size_t vlc_iconv( vlc_iconv_t cd, char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft )
+{
+#if defined(HAVE_ICONV)
+ return iconv( cd, inbuf, inbytesleft, outbuf, outbytesleft );
+#else
+ int i_bytes = __MIN(inbytesleft, outbytesleft);
+ if( !inbuf || !outbuf || !i_bytes ) return (size_t)(-1);
+ memcpy( *outbuf, *inbuf, i_bytes );
+ inbuf += i_bytes;
+ outbuf += i_bytes;
+ inbytesleft -= i_bytes;
+ outbytesleft -= i_bytes;
+ return i_bytes;
+#endif
+}
+
+int vlc_iconv_close( vlc_iconv_t cd )
+{
+#if defined(HAVE_ICONV)
+ return iconv_close( cd );
+#else
+ return 0;
+#endif
+}
+
+/*****************************************************************************
+ * reduce a fraction
+ * (adapted from libavcodec, author Michael Niedermayer <michaelni@gmx.at>)
+ *****************************************************************************/
+vlc_bool_t vlc_reduce( int *pi_dst_nom, int *pi_dst_den,
+ int64_t i_nom, int64_t i_den, int64_t i_max )
+{
+ vlc_bool_t b_exact = 1, b_sign = 0;
+ int64_t i_gcd;
+
+ if( i_den == 0 )
+ {
+ i_nom = 0;
+ i_den = 1;
+ return 1;
+ }
+
+ if( i_den < 0 )
+ {
+ i_den = - i_den;
+ i_nom = - i_nom;
+ }
+
+ if( i_nom < 0 )
+ {
+ i_nom = - i_nom;
+ b_sign = 1;
+ }
+
+ i_gcd = GCD( i_nom, i_den );
+ i_nom /= i_gcd;
+ i_den /= i_gcd;
+
+ if( i_nom > i_max || i_den > i_max )
+ {
+ int i_a0_num = 0, i_a0_den = 1, i_a1_num = 1, i_a1_den = 0;
+ b_exact = 0;
+
+ for( ; ; )
+ {
+ int64_t i_x = i_nom / i_den;
+ int64_t i_a2n = i_x * i_a1_num + i_a0_num;
+ int64_t i_a2d = i_x * i_a1_den + i_a0_den;
+
+ if( i_a2n > i_max || i_a2d > i_max ) break;
+
+ i_nom %= i_den;
+
+ i_a0_num = i_a1_num; i_a0_den = i_a1_den;
+ i_a1_num = i_a2n; i_a1_den = i_a2d;
+ if( i_nom == 0 ) break;
+ i_x = i_nom; i_nom = i_den; i_den = i_x;
+ }
+ i_nom = i_a1_num;
+ i_den = i_a1_den;
+ }
+
+ if( b_sign ) i_nom = - i_nom;
+
+ *pi_dst_nom = i_nom;
+ *pi_dst_den = i_den;
+
+ return b_exact;
+}
projects / vlc / blobdiff