/*****************************************************************************
* 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 $
+ * Copyright (C) 2002-2006 the VideoLAN team
+ * $Id$
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
* Samuel Hocevar <sam@zoy.org>
+ * Gildas Bazin <gbazin@videolan.org>
+ * Derk-Jan Hartman <hartman at videolan dot org>
+ * Christophe Massiot <massiot@via.ecp.fr>
+ * Rémi Denis-Courmont <rem à videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
-#include <string.h> /* strdup() */
-#include <stdlib.h>
-
#include <vlc/vlc.h>
+#include <ctype.h>
+
+
+#undef iconv_t
+#undef iconv_open
+#undef iconv
+#undef iconv_close
+
+#if defined(HAVE_ICONV)
+# include <iconv.h>
+#endif
+
+#ifdef HAVE_DIRENT_H
+# include <dirent.h>
+#endif
+
+#ifdef HAVE_FORK
+# include <sys/time.h>
+# include <unistd.h>
+# include <errno.h>
+# include <sys/wait.h>
+# include <fcntl.h>
+# include <sys/socket.h>
+# include <sys/poll.h>
+#endif
+
+#if defined(WIN32) || defined(UNDER_CE)
+# undef _wopendir
+# undef _wreaddir
+# undef _wclosedir
+# undef rewinddir
+# undef seekdir
+# undef telldir
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+#endif
+
+#ifdef UNDER_CE
+# define strcoll strcmp
+#endif
+
/*****************************************************************************
* getenv: just in case, but it should never be called
*****************************************************************************/
len = __MIN( len, n );
psz = (char*)malloc( len + 1 );
-
if( psz != NULL )
{
memcpy( (void*)psz, (const void*)string, len );
}
#endif
+/*****************************************************************************
+ * strnlen:
+ *****************************************************************************/
+#if !defined( HAVE_STRNLEN )
+size_t vlc_strnlen( const char *psz, size_t n )
+{
+ const char *psz_end = memchr( psz, 0, n );
+ return psz_end ? (size_t)( psz_end - psz ) : n;
+}
+#endif
+
/*****************************************************************************
* strcasecmp: compare two strings ignoring case
*****************************************************************************/
#if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
int vlc_strcasecmp( const char *s1, const char *s2 )
{
- int i_delta = 0;
+ int c1, c2;
+ if( !s1 || !s2 ) return -1;
- while( !i_delta && *s1 && *s2 )
+ while( *s1 && *s2 )
{
- i_delta = *s1 - *s2;
-
- if( *s1 >= 'A' && *s1 <= 'Z' )
- {
- i_delta -= 'A' - 'a';
- }
-
- if( *s2 >= 'A' && *s2 <= 'Z' )
- {
- i_delta += 'A' - 'a';
- }
+ c1 = tolower(*s1);
+ c2 = tolower(*s2);
+ if( c1 != c2 ) return (c1 < c2 ? -1 : 1);
s1++; s2++;
}
- return i_delta;
+ if( !*s1 && !*s2 ) return 0;
+ else return (*s1 ? 1 : -1);
}
#endif
#if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
{
- int i_delta = 0;
+ int c1, c2;
+ if( !s1 || !s2 ) return -1;
- while( n-- && !i_delta && *s1 )
+ while( n > 0 && *s1 && *s2 )
{
- i_delta = *s1 - *s2;
+ c1 = tolower(*s1);
+ c2 = tolower(*s2);
+
+ if( c1 != c2 ) return (c1 < c2 ? -1 : 1);
+ s1++; s2++; n--;
+ }
+
+ if( !n || (!*s1 && !*s2) ) return 0;
+ else return (*s1 ? 1 : -1);
+}
+#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 = (char *)psz_big;
- if( *s1 >= 'A' && *s1 <= 'Z' )
+ if( !psz_big || !psz_little || !*psz_little ) return p_pos;
+
+ while( *p_pos )
+ {
+ if( toupper( *p_pos ) == toupper( *psz_little ) )
{
- i_delta -= 'A' - 'a';
+ char * psz_cur1 = p_pos + 1;
+ char * psz_cur2 = (char *)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(__APPLE__) || 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;
+ }
- if( *s2 >= 'A' && *s2 <= 'Z' )
+ 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)
{
- i_delta += 'A' - 'a';
+ *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;
}
-
- s1++; s2++;
}
+}
+#endif
- return i_delta;
+/*****************************************************************************
+ * asprintf:
+ *****************************************************************************/
+#if !defined(HAVE_ASPRINTF) || defined(__APPLE__) || 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
double vlc_atof( const char *nptr )
{
double f_result;
- wchar_t *psz_tmp;
+ wchar_t *psz_tmp = NULL;
int i_len = strlen( nptr ) + 1;
psz_tmp = malloc( i_len * sizeof(wchar_t) );
+ if( !psz_tmp )
+ return NULL;
MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
f_result = wcstod( psz_tmp, NULL );
free( psz_tmp );
#endif
/*****************************************************************************
- * lseek: reposition read/write file offset.
- *****************************************************************************
- * FIXME: this cast sucks!
+ * strtoll: convert a string to a 64 bits int.
+ *****************************************************************************/
+#if !defined( HAVE_STRTOLL )
+int64_t vlc_strtoll( const char *nptr, char **endptr, int base )
+{
+ int64_t i_value = 0;
+ int sign = 1, newbase = base ? base : 10;
+
+ while( isspace(*nptr) ) nptr++;
+
+ if( *nptr == '-' )
+ {
+ sign = -1;
+ nptr++;
+ }
+
+ /* Try to detect base */
+ if( *nptr == '0' )
+ {
+ newbase = 8;
+ nptr++;
+
+ if( *nptr == 'x' )
+ {
+ newbase = 16;
+ nptr++;
+ }
+ }
+
+ if( base && newbase != base )
+ {
+ if( endptr ) *endptr = (char *)nptr;
+ return i_value;
+ }
+
+ switch( newbase )
+ {
+ case 10:
+ while( *nptr >= '0' && *nptr <= '9' )
+ {
+ i_value *= 10;
+ i_value += ( *nptr++ - '0' );
+ }
+ if( endptr ) *endptr = (char *)nptr;
+ break;
+
+ case 16:
+ while( (*nptr >= '0' && *nptr <= '9') ||
+ (*nptr >= 'a' && *nptr <= 'f') ||
+ (*nptr >= 'A' && *nptr <= 'F') )
+ {
+ int i_valc = 0;
+ if(*nptr >= '0' && *nptr <= '9') i_valc = *nptr - '0';
+ else if(*nptr >= 'a' && *nptr <= 'f') i_valc = *nptr - 'a' +10;
+ else if(*nptr >= 'A' && *nptr <= 'F') i_valc = *nptr - 'A' +10;
+ i_value *= 16;
+ i_value += i_valc;
+ nptr++;
+ }
+ if( endptr ) *endptr = (char *)nptr;
+ break;
+
+ default:
+ i_value = strtol( nptr, endptr, newbase );
+ break;
+ }
+
+ return i_value * sign;
+}
+#endif
+
+/*****************************************************************************
+ * atoll: convert a string to a 64 bits int.
+ *****************************************************************************/
+#if !defined( HAVE_ATOLL )
+int64_t vlc_atoll( const char *nptr )
+{
+ return strtoll( nptr, (char **)NULL, 10 );
+}
+#endif
+
+/*****************************************************************************
+ * lldiv: returns quotient and remainder
*****************************************************************************/
-#if !defined( HAVE_LSEEK )
-off_t vlc_lseek( int fildes, off_t offset, int whence )
+#if defined(SYS_BEOS) \
+ || (defined (__FreeBSD__) && (__FreeBSD__ < 5))
+lldiv_t vlc_lldiv( long long numer, long long denom )
+{
+ lldiv_t d;
+ d.quot = numer / denom;
+ d.rem = numer % denom;
+ return d;
+}
+#endif
+
+
+/**
+ * Copy a string to a sized buffer. The result is always nul-terminated
+ * (contrary to strncpy()).
+ *
+ * @param dest destination buffer
+ * @param src string to be copied
+ * @param len maximum number of characters to be copied plus one for the
+ * terminating nul.
+ *
+ * @return strlen(src)
+ */
+#ifndef HAVE_STRLCPY
+extern size_t vlc_strlcpy (char *tgt, const char *src, size_t bufsize)
{
- return SetFilePointer( (HANDLE)fildes, (long)offset, NULL, whence );
+ size_t length;
+
+ for (length = 1; (length < bufsize) && *src; length++)
+ *tgt++ = *src++;
+
+ if (bufsize)
+ *tgt = '\0';
+
+ while (*src++)
+ length++;
+
+ return length - 1;
}
#endif
+/*****************************************************************************
+ * vlc_*dir_wrapper: wrapper under Windows to return the list of drive letters
+ * when called with an empty argument or just '\'
+ *****************************************************************************/
+#if defined(WIN32) && !defined(UNDER_CE)
+# include <assert.h>
+
+typedef struct vlc_DIR
+{
+ _WDIR *p_real_dir;
+ int i_drives;
+ struct _wdirent dd_dir;
+ vlc_bool_t b_insert_back;
+} vlc_DIR;
+
+void *vlc_wopendir( const wchar_t *wpath )
+{
+ vlc_DIR *p_dir = NULL;
+ _WDIR *p_real_dir = NULL;
+
+ if ( wpath == NULL || wpath[0] == '\0'
+ || (wcscmp (wpath, L"\\") == 0) )
+ {
+ /* Special mode to list drive letters */
+ p_dir = malloc( sizeof(vlc_DIR) );
+ if( !p_dir )
+ return NULL;
+ p_dir->p_real_dir = NULL;
+ p_dir->i_drives = GetLogicalDrives();
+ return (void *)p_dir;
+ }
+
+ p_real_dir = _wopendir( wpath );
+ if ( p_real_dir == NULL )
+ return NULL;
+
+ p_dir = malloc( sizeof(vlc_DIR) );
+ if( !p_dir )
+ {
+ _wclosedir( p_real_dir );
+ return NULL;
+ }
+ p_dir->p_real_dir = p_real_dir;
+
+ assert (wpath[0]); // wpath[1] is defined
+ p_dir->b_insert_back = !wcscmp (wpath + 1, L":\\");
+ return (void *)p_dir;
+}
+
+struct _wdirent *vlc_wreaddir( void *_p_dir )
+{
+ vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
+ unsigned int i;
+ DWORD i_drives;
+
+ if ( p_dir->p_real_dir != NULL )
+ {
+ if ( p_dir->b_insert_back )
+ {
+ /* Adds "..", gruik! */
+ p_dir->dd_dir.d_ino = 0;
+ p_dir->dd_dir.d_reclen = 0;
+ p_dir->dd_dir.d_namlen = 2;
+ wcscpy( p_dir->dd_dir.d_name, L".." );
+ p_dir->b_insert_back = VLC_FALSE;
+ return &p_dir->dd_dir;
+ }
+
+ return _wreaddir( p_dir->p_real_dir );
+ }
+
+ /* Drive letters mode */
+ i_drives = p_dir->i_drives;
+ if ( !i_drives )
+ return NULL; /* end */
+
+ for ( i = 0; i < sizeof(DWORD)*8; i++, i_drives >>= 1 )
+ if ( i_drives & 1 ) break;
+
+ if ( i >= 26 )
+ return NULL; /* this should not happen */
+
+ swprintf( p_dir->dd_dir.d_name, L"%c:\\", 'A' + i );
+ p_dir->dd_dir.d_namlen = wcslen(p_dir->dd_dir.d_name);
+ p_dir->i_drives &= ~(1UL << i);
+ return &p_dir->dd_dir;
+}
+
+int vlc_wclosedir( void *_p_dir )
+{
+ vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
+ int i_ret = 0;
+
+ if ( p_dir->p_real_dir != NULL )
+ i_ret = _wclosedir( p_dir->p_real_dir );
+
+ free( p_dir );
+ return i_ret;
+}
+
+void vlc_rewinddir( void *_p_dir )
+{
+ vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
+
+ if ( p_dir->p_real_dir != NULL )
+ _wrewinddir( p_dir->p_real_dir );
+}
+
+void vlc_seekdir( void *_p_dir, long loc)
+{
+ vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
+
+ if ( p_dir->p_real_dir != NULL )
+ _wseekdir( p_dir->p_real_dir, loc );
+}
+
+long vlc_telldir( void *_p_dir )
+{
+ vlc_DIR *p_dir = (vlc_DIR *)_p_dir;
+
+ if ( p_dir->p_real_dir != NULL )
+ return _wtelldir( p_dir->p_real_dir );
+ return 0;
+}
+#endif
+
+/*****************************************************************************
+ * scandir: scan a directory alpha-sorted
+ *****************************************************************************/
+#if !defined( HAVE_SCANDIR )
+/* FIXME: I suspect this is dead code -> utf8_scandir */
+#ifdef WIN32
+# undef opendir
+# undef readdir
+# undef closedir
+#endif
+int vlc_alphasort( const struct dirent **a, const struct dirent **b )
+{
+ return strcoll( (*a)->d_name, (*b)->d_name );
+}
+
+int vlc_scandir( const char *name, struct dirent ***namelist,
+ int (*filter) ( const struct dirent * ),
+ int (*compar) ( const struct dirent **,
+ const struct dirent ** ) )
+{
+ DIR * p_dir;
+ struct dirent * p_content;
+ struct dirent ** pp_list;
+ int ret, size;
+
+ if( !namelist || !( p_dir = opendir( name ) ) ) return -1;
+
+ ret = 0;
+ pp_list = NULL;
+ while( ( p_content = readdir( p_dir ) ) )
+ {
+ if( filter && !filter( p_content ) )
+ {
+ continue;
+ }
+ pp_list = realloc( pp_list, ( ret + 1 ) * sizeof( struct dirent * ) );
+ size = sizeof( struct dirent ) + strlen( p_content->d_name ) + 1;
+ pp_list[ret] = malloc( size );
+ if( pp_list[ret] )
+ {
+ memcpy( pp_list[ret], p_content, size );
+ ret++;
+ }
+ else
+ {
+ /* Continuing is useless when no more memory can be allocted,
+ * so better return what we have found.
+ */
+ ret = -1;
+ break;
+ }
+ }
+
+ closedir( p_dir );
+
+ if( compar )
+ {
+ qsort( pp_list, ret, sizeof( struct dirent * ),
+ (int (*)(const void *, const void *)) compar );
+ }
+
+ *namelist = pp_list;
+ return ret;
+}
+#endif
+
+#ifdef WIN32
/*****************************************************************************
* dgettext: gettext for plugins.
*****************************************************************************/
return (char *)msgid;
#endif
}
+#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 )
+{
+ int i_len;
+ char *psz_line, *psz_new_text;
+
+ psz_line = psz_new_text = strdup( psz_text );
+
+ i_len = count_utf8_string( 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' )
+ {
+ 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 != ' ' )
+ {
+ 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' )
+ {
+ 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, const char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft )
+{
+#if defined(HAVE_ICONV)
+ return iconv( cd, (ICONV_CONST char **)inbuf, inbytesleft,
+ outbuf, outbytesleft );
+#else
+ int i_bytes;
+
+ if (inbytesleft == NULL || outbytesleft == NULL)
+ {
+ return 0;
+ }
+
+ 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_ureduce( unsigned *pi_dst_nom, unsigned *pi_dst_den,
+ uint64_t i_nom, uint64_t i_den, uint64_t i_max )
+{
+ vlc_bool_t b_exact = 1;
+ uint64_t i_gcd;
+
+ if( i_den == 0 )
+ {
+ *pi_dst_nom = 0;
+ *pi_dst_den = 1;
+ return 1;
+ }
+
+ i_gcd = GCD( i_nom, i_den );
+ i_nom /= i_gcd;
+ i_den /= i_gcd;
+
+ if( i_max == 0 ) i_max = I64C(0xFFFFFFFF);
+
+ if( i_nom > i_max || i_den > i_max )
+ {
+ uint64_t i_a0_num = 0, i_a0_den = 1, i_a1_num = 1, i_a1_den = 0;
+ b_exact = 0;
+
+ for( ; ; )
+ {
+ uint64_t i_x = i_nom / i_den;
+ uint64_t i_a2n = i_x * i_a1_num + i_a0_num;
+ uint64_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;
+ }
+
+ *pi_dst_nom = i_nom;
+ *pi_dst_den = i_den;
+
+ return b_exact;
+}
+
+/*************************************************************************
+ * vlc_parse_cmdline: Command line parsing into elements.
+ *
+ * The command line is composed of space/tab separated arguments.
+ * Quotes can be used as argument delimiters and a backslash can be used to
+ * escape a quote.
+ *************************************************************************/
+static void find_end_quote( char **s, char **ppsz_parser, int i_quote )
+{
+ int i_bcount = 0;
+
+ while( **s )
+ {
+ if( **s == '\\' )
+ {
+ **ppsz_parser = **s;
+ (*ppsz_parser)++; (*s)++;
+ i_bcount++;
+ }
+ else if( **s == '"' || **s == '\'' )
+ {
+ /* Preceeded by a number of '\' which we erase. */
+ *ppsz_parser -= i_bcount / 2;
+ if( i_bcount & 1 )
+ {
+ /* '\\' followed by a '"' or '\'' */
+ *ppsz_parser -= 1;
+ **ppsz_parser = **s;
+ (*ppsz_parser)++; (*s)++;
+ i_bcount = 0;
+ continue;
+ }
+
+ if( **s == i_quote )
+ {
+ /* End */
+ return;
+ }
+ else
+ {
+ /* Different quoting */
+ int i_quote = **s;
+ **ppsz_parser = **s;
+ (*ppsz_parser)++; (*s)++;
+ find_end_quote( s, ppsz_parser, i_quote );
+ **ppsz_parser = **s;
+ (*ppsz_parser)++; (*s)++;
+ }
+
+ i_bcount = 0;
+ }
+ else
+ {
+ /* A regular character */
+ **ppsz_parser = **s;
+ (*ppsz_parser)++; (*s)++;
+ i_bcount = 0;
+ }
+ }
+}
+
+char **vlc_parse_cmdline( const char *psz_cmdline, int *i_args )
+{
+ int argc = 0;
+ char **argv = 0;
+ char *s, *psz_parser, *psz_arg, *psz_orig;
+ int i_bcount = 0;
+
+ if( !psz_cmdline ) return 0;
+ psz_orig = strdup( psz_cmdline );
+ psz_arg = psz_parser = s = psz_orig;
+
+ while( *s )
+ {
+ if( *s == '\t' || *s == ' ' )
+ {
+ /* We have a complete argument */
+ *psz_parser = 0;
+ TAB_APPEND( argc, argv, strdup(psz_arg) );
+
+ /* Skip trailing spaces/tabs */
+ do{ s++; } while( *s == '\t' || *s == ' ' );
+
+ /* New argument */
+ psz_arg = psz_parser = s;
+ i_bcount = 0;
+ }
+ else if( *s == '\\' )
+ {
+ *psz_parser++ = *s++;
+ i_bcount++;
+ }
+ else if( *s == '"' || *s == '\'' )
+ {
+ if( ( i_bcount & 1 ) == 0 )
+ {
+ /* Preceeded by an even number of '\', this is half that
+ * number of '\', plus a quote which we erase. */
+ int i_quote = *s;
+ psz_parser -= i_bcount / 2;
+ s++;
+ find_end_quote( &s, &psz_parser, i_quote );
+ s++;
+ }
+ else
+ {
+ /* Preceeded by an odd number of '\', this is half that
+ * number of '\' followed by a '"' */
+ psz_parser = psz_parser - i_bcount/2 - 1;
+ *psz_parser++ = '"';
+ s++;
+ }
+ i_bcount = 0;
+ }
+ else
+ {
+ /* A regular character */
+ *psz_parser++ = *s++;
+ i_bcount = 0;
+ }
+ }
+
+ /* Take care of the last arg */
+ if( *psz_arg )
+ {
+ *psz_parser = '\0';
+ TAB_APPEND( argc, argv, strdup(psz_arg) );
+ }
+
+ if( i_args ) *i_args = argc;
+ free( psz_orig );
+ return argv;
+}
+
+/*************************************************************************
+ * vlc_execve: Execute an external program with a given environment,
+ * wait until it finishes and return its standard output
+ *************************************************************************/
+int __vlc_execve( vlc_object_t *p_object, int i_argc, char *const *ppsz_argv,
+ char *const *ppsz_env, const char *psz_cwd,
+ const char *p_in, size_t i_in,
+ char **pp_data, size_t *pi_data )
+{
+ (void)i_argc; // <-- hmph
+#ifdef HAVE_FORK
+# define BUFSIZE 1024
+ int fds[2], i_status;
+
+ if (socketpair (AF_LOCAL, SOCK_STREAM, 0, fds))
+ return -1;
+
+ pid_t pid = -1;
+ if ((fds[0] > 2) && (fds[1] > 2))
+ pid = fork ();
+
+ switch (pid)
+ {
+ case -1:
+ msg_Err (p_object, "unable to fork (%s)", strerror (errno));
+ close (fds[0]);
+ close (fds[1]);
+ return -1;
+
+ case 0:
+ /* NOTE:
+ * Like it or not, close can fail (and not only with EBADF)
+ */
+ if ((close (0) == 0) && (close (1) == 0) && (close (2) == 0)
+ && (dup (fds[1]) == 0) && (dup (fds[1]) == 1)
+ && (open ("/dev/null", O_RDONLY) == 2)
+ && ((psz_cwd == NULL) || (chdir (psz_cwd) == 0)))
+ execve (ppsz_argv[0], ppsz_argv, ppsz_env);
+
+ exit (1);
+ }
+
+ close (fds[1]);
+
+ *pi_data = 0;
+ if (*pp_data)
+ free (*pp_data);
+ *pp_data = NULL;
+
+ if (i_in == 0)
+ shutdown (fds[0], SHUT_WR);
+
+ while (!p_object->b_die)
+ {
+ struct pollfd ufd[1];
+ memset (ufd, 0, sizeof (ufd));
+ ufd[0].fd = fds[0];
+ ufd[0].events = POLLIN;
+
+ if (i_in > 0)
+ ufd[0].events |= POLLOUT;
+
+ if (poll (ufd, 1, 10) <= 0)
+ continue;
+
+ if (ufd[0].revents & ~POLLOUT)
+ {
+ char *ptr = realloc (*pp_data, *pi_data + BUFSIZE + 1);
+ if (ptr == NULL)
+ break; /* safely abort */
+
+ *pp_data = ptr;
+
+ ssize_t val = read (fds[0], ptr + *pi_data, BUFSIZE);
+ switch (val)
+ {
+ case -1:
+ case 0:
+ shutdown (fds[0], SHUT_RD);
+ break;
+
+ default:
+ *pi_data += val;
+ }
+ }
+
+ if (ufd[0].revents & POLLOUT)
+ {
+ ssize_t val = write (fds[0], p_in, i_in);
+ switch (val)
+ {
+ case -1:
+ case 0:
+ i_in = 0;
+ shutdown (fds[0], SHUT_WR);
+ break;
+
+ default:
+ i_in -= val;
+ p_in += val;
+ }
+ }
+ }
+
+ close (fds[0]);
+
+ while (waitpid (pid, &i_status, 0) == -1);
+
+ if (WIFEXITED (i_status))
+ {
+ i_status = WEXITSTATUS (i_status);
+ if (i_status)
+ msg_Warn (p_object, "child %s (PID %d) exited with error code %d",
+ ppsz_argv[0], (int)pid, i_status);
+ }
+ else
+ if (WIFSIGNALED (i_status)) // <-- this should be redumdant a check
+ {
+ i_status = WTERMSIG (i_status);
+ msg_Warn (p_object, "child %s (PID %d) exited on signal %d (%s)",
+ ppsz_argv[0], (int)pid, i_status, strsignal (i_status));
+ }
+
+#elif defined( WIN32 ) && !defined( UNDER_CE )
+ SECURITY_ATTRIBUTES saAttr;
+ PROCESS_INFORMATION piProcInfo;
+ STARTUPINFO siStartInfo;
+ BOOL bFuncRetn = FALSE;
+ HANDLE hChildStdinRd, hChildStdinWr, hChildStdoutRd, hChildStdoutWr;
+ DWORD i_status;
+ char *psz_cmd = NULL, *p_env = NULL, *p = NULL;
+ char **ppsz_parser;
+ int i_size;
+
+ /* Set the bInheritHandle flag so pipe handles are inherited. */
+ saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
+ saAttr.bInheritHandle = TRUE;
+ saAttr.lpSecurityDescriptor = NULL;
+
+ /* Create a pipe for the child process's STDOUT. */
+ if ( !CreatePipe( &hChildStdoutRd, &hChildStdoutWr, &saAttr, 0 ) )
+ {
+ msg_Err( p_object, "stdout pipe creation failed" );
+ return -1;
+ }
+
+ /* Ensure the read handle to the pipe for STDOUT is not inherited. */
+ SetHandleInformation( hChildStdoutRd, HANDLE_FLAG_INHERIT, 0 );
+
+ /* Create a pipe for the child process's STDIN. */
+ if ( !CreatePipe( &hChildStdinRd, &hChildStdinWr, &saAttr, 0 ) )
+ {
+ msg_Err( p_object, "stdin pipe creation failed" );
+ return -1;
+ }
+
+ /* Ensure the write handle to the pipe for STDIN is not inherited. */
+ SetHandleInformation( hChildStdinWr, HANDLE_FLAG_INHERIT, 0 );
+
+ /* Set up members of the PROCESS_INFORMATION structure. */
+ ZeroMemory( &piProcInfo, sizeof(PROCESS_INFORMATION) );
+
+ /* Set up members of the STARTUPINFO structure. */
+ ZeroMemory( &siStartInfo, sizeof(STARTUPINFO) );
+ siStartInfo.cb = sizeof(STARTUPINFO);
+ siStartInfo.hStdError = hChildStdoutWr;
+ siStartInfo.hStdOutput = hChildStdoutWr;
+ siStartInfo.hStdInput = hChildStdinRd;
+ siStartInfo.wShowWindow = SW_HIDE;
+ siStartInfo.dwFlags |= STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+
+ /* Set up the command line. */
+ psz_cmd = malloc(32768);
+ if( !psz_cmd )
+ return -1;
+ psz_cmd[0] = '\0';
+ i_size = 32768;
+ ppsz_parser = &ppsz_argv[0];
+ while ( ppsz_parser[0] != NULL && i_size > 0 )
+ {
+ /* Protect the last argument with quotes ; the other arguments
+ * are supposed to be already protected because they have been
+ * passed as a command-line option. */
+ if ( ppsz_parser[1] == NULL )
+ {
+ strncat( psz_cmd, "\"", i_size );
+ i_size--;
+ }
+ strncat( psz_cmd, *ppsz_parser, i_size );
+ i_size -= strlen( *ppsz_parser );
+ if ( ppsz_parser[1] == NULL )
+ {
+ strncat( psz_cmd, "\"", i_size );
+ i_size--;
+ }
+ strncat( psz_cmd, " ", i_size );
+ i_size--;
+ ppsz_parser++;
+ }
+
+ /* Set up the environment. */
+ p = p_env = malloc(32768);
+ if( !p )
+ {
+ free( psz_cmd );
+ return -1;
+ }
+
+ i_size = 32768;
+ ppsz_parser = &ppsz_env[0];
+ while ( *ppsz_parser != NULL && i_size > 0 )
+ {
+ memcpy( p, *ppsz_parser,
+ __MIN((int)(strlen(*ppsz_parser) + 1), i_size) );
+ p += strlen(*ppsz_parser) + 1;
+ i_size -= strlen(*ppsz_parser) + 1;
+ ppsz_parser++;
+ }
+ *p = '\0';
+
+ /* Create the child process. */
+ bFuncRetn = CreateProcess( NULL,
+ psz_cmd, // command line
+ NULL, // process security attributes
+ NULL, // primary thread security attributes
+ TRUE, // handles are inherited
+ 0, // creation flags
+ p_env,
+ psz_cwd,
+ &siStartInfo, // STARTUPINFO pointer
+ &piProcInfo ); // receives PROCESS_INFORMATION
+
+ free( psz_cmd );
+ free( p_env );
+
+ if ( bFuncRetn == 0 )
+ {
+ msg_Err( p_object, "child creation failed" );
+ return -1;
+ }
+
+ /* Read from a file and write its contents to a pipe. */
+ while ( i_in > 0 && !p_object->b_die )
+ {
+ DWORD i_written;
+ if ( !WriteFile( hChildStdinWr, p_in, i_in, &i_written, NULL ) )
+ break;
+ i_in -= i_written;
+ p_in += i_written;
+ }
+
+ /* Close the pipe handle so the child process stops reading. */
+ CloseHandle(hChildStdinWr);
+
+ /* Close the write end of the pipe before reading from the
+ * read end of the pipe. */
+ CloseHandle(hChildStdoutWr);
+
+ /* Read output from the child process. */
+ *pi_data = 0;
+ if( *pp_data )
+ free( pp_data );
+ *pp_data = NULL;
+ *pp_data = malloc( 1025 ); /* +1 for \0 */
+
+ while ( !p_object->b_die )
+ {
+ DWORD i_read;
+ if ( !ReadFile( hChildStdoutRd, &(*pp_data)[*pi_data], 1024, &i_read,
+ NULL )
+ || i_read == 0 )
+ break;
+ *pi_data += i_read;
+ *pp_data = realloc( *pp_data, *pi_data + 1025 );
+ }
+
+ while ( !p_object->b_die
+ && !GetExitCodeProcess( piProcInfo.hProcess, &i_status )
+ && i_status != STILL_ACTIVE )
+ msleep( 10000 );
+
+ CloseHandle(piProcInfo.hProcess);
+ CloseHandle(piProcInfo.hThread);
+
+ if ( i_status )
+ msg_Warn( p_object,
+ "child %s returned with error code %ld",
+ ppsz_argv[0], i_status );
+
+#else
+ msg_Err( p_object, "vlc_execve called but no implementation is available" );
+ return -1;
+
+#endif
+
+ if (*pp_data == NULL)
+ return -1;
+
+ (*pp_data)[*pi_data] = '\0';
+ return 0;
+}
projects / vlc / blobdiff