include/vlc_fixups.h

   1 /*****************************************************************************
   2  * fixups.h: portability fixups included from config.h
   3  *****************************************************************************
   4  * Copyright © 1998-2008 the VideoLAN project
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 /**
  22  * \file
  23  * This file is a collection of portability fixes
  24  */
  25
  26 #ifndef LIBVLC_FIXUPS_H
  27 # define LIBVLC_FIXUPS_H 1
  28
  29 #ifndef HAVE_STRDUP
  30 # include <string.h>
  31 # include <stdlib.h>
  32 static inline char *strdup (const char *str)
  33 {
  34     size_t len = strlen (str) + 1;
  35     char *res = (char *)malloc (len);
  36     if (res) memcpy (res, str, len);
  37     return res;
  38 }
  39 #endif
  40
  41 #ifndef HAVE_VASPRINTF
  42 # include <stdio.h>
  43 # include <stdlib.h>
  44 # include <stdarg.h>
  45 static inline int vasprintf (char **strp, const char *fmt, va_list ap)
  46 {
  47 #ifndef UNDER_CE
  48     int len = vsnprintf (NULL, 0, fmt, ap) + 1;
  49     char *res = (char *)malloc (len);
  50     if (res == NULL)
  51         return -1;
  52     *strp = res;
  53     return vsprintf (res, fmt, ap);
  54 #else
  55     /* HACK: vsnprintf in the WinCE API behaves like
  56      * the one in glibc 2.0 and doesn't return the number of characters
  57      * it needed to copy the string.
  58      * cf http://msdn.microsoft.com/en-us/library/1kt27hek.aspx
  59      * and cf the man page of vsnprintf
  60      *
  61      Guess we need no more than 50 bytes. */
  62     int n, size = 50;
  63     char *res, *np;
  64
  65     if ((res = (char *) malloc (size)) == NULL)
  66         return -1;
  67
  68     while (1)
  69     {
  70         n = vsnprintf (res, size, fmt, ap);
  71
  72         /* If that worked, return the string. */
  73         if (n > -1 && n < size)
  74         {
  75             *strp = res;
  76             return n;
  77         }
  78
  79         /* Else try again with more space. */
  80         if (n == -1)
  81             size *= 2;  /* twice the old size */
  82
  83         if ((np = (char *) realloc (res, size)) == NULL)
  84         {
  85             free(res);
  86             return -1;
  87         }
  88         else
  89         {
  90             res = np;
  91         }
  92
  93     }
  94 #endif /* UNDER_CE */
  95 }
  96 #endif
  97
  98 #ifndef HAVE_ASPRINTF
  99 # include <stdio.h>
 100 # include <stdarg.h>
 101 static inline int asprintf (char **strp, const char *fmt, ...)
 102 {
 103     va_list ap;
 104     int ret;
 105     va_start (ap, fmt);
 106     ret = vasprintf (strp, fmt, ap);
 107     va_end (ap);
 108     return ret;
 109 }
 110 #endif
 111
 112 #ifndef HAVE_STRNLEN
 113 # include <string.h>
 114 static inline size_t strnlen (const char *str, size_t max)
 115 {
 116     const char *end = (const char *) memchr (str, 0, max);
 117     return end ? (size_t)(end - str) : max;
 118 }
 119 #endif
 120
 121 #ifndef HAVE_STRNDUP
 122 # include <string.h>
 123 # include <stdlib.h>
 124 static inline char *strndup (const char *str, size_t max)
 125 {
 126     size_t len = strnlen (str, max);
 127     char *res = (char *) malloc (len + 1);
 128     if (res)
 129     {
 130         memcpy (res, str, len);
 131         res[len] = '\0';
 132     }
 133     return res;
 134 }
 135 #endif
 136
 137 #ifndef HAVE_STRLCPY
 138 # define strlcpy vlc_strlcpy
 139 #endif
 140
 141 #ifndef HAVE_STRTOF
 142 # define strtof( a, b ) ((float)strtod (a, b))
 143 #endif
 144
 145 #ifndef HAVE_ATOF
 146 # define atof( str ) (strtod ((str), (char **)NULL, 10))
 147 #endif
 148
 149 #ifndef HAVE_STRTOLL
 150 # define strtoll vlc_strtoll
 151 #endif
 152
 153 #ifndef HAVE_STRSEP
 154 # define strsep vlc_strsep
 155 #endif
 156
 157 #ifndef HAVE_ATOLL
 158 # define atoll( str ) (strtoll ((str), (char **)NULL, 10))
 159 #endif
 160
 161 #ifndef HAVE_LLDIV
 162 typedef struct {
 163     long long quot; /* Quotient. */
 164     long long rem;  /* Remainder. */
 165 } lldiv_t;
 166
 167 static inline lldiv_t lldiv (long long numer, long long denom)
 168 {
 169     lldiv_t d = { .quot = numer / denom, .rem = numer % denom };
 170     return d;
 171 }
 172 #endif
 173
 174 #ifndef HAVE_SCANDIR
 175 # define scandir vlc_scandir
 176 # define alphasort vlc_alphasort
 177 #endif
 178
 179 #ifndef HAVE_GETENV
 180 static inline char *getenv (const char *name)
 181 {
 182     (void)name;
 183     return NULL;
 184 }
 185 #endif
 186
 187 #ifndef HAVE_STRCASECMP
 188 # ifndef HAVE_STRICMP
 189 #  include <ctype.h>
 190 static inline int strcasecmp (const char *s1, const char *s2)
 191 {
 192     for (size_t i = 0;; i++)
 193     {
 194         int d = tolower (s1[i]) - tolower (s2[i]);
 195         if (d || !s1[i]) return d;
 196     }
 197     return 0;
 198 }
 199 # else
 200 #  define strcasecmp stricmp
 201 # endif
 202 #endif
 203
 204 #ifndef HAVE_STRNCASECMP
 205 # ifndef HAVE_STRNICMP
 206 #  include <ctype.h>
 207 static inline int strncasecmp (const char *s1, const char *s2, size_t n)
 208 {
 209     for (size_t i = 0; i < n; i++)
 210     {
 211         int d = tolower (s1[i]) - tolower (s2[i]);
 212         if (d || !s1[i]) return d;
 213     }
 214     return 0;
 215 }
 216 # else
 217 #  define strncasecmp strnicmp
 218 # endif
 219 #endif
 220
 221 #ifndef HAVE_STRCASESTR
 222 # ifndef HAVE_STRISTR
 223 #  define strcasestr vlc_strcasestr
 224 # else
 225 #  define strcasestr stristr
 226 # endif
 227 #endif
 228
 229 #ifndef HAVE_LOCALTIME_R
 230 /* If localtime_r() is not provided, we assume localtime() uses
 231  * thread-specific storage. */
 232 # include <time.h>
 233 static inline struct tm *localtime_r (const time_t *timep, struct tm *result)
 234 {
 235     struct tm *s = localtime (timep);
 236     if (s == NULL)
 237         return NULL;
 238
 239     *result = *s;
 240     return result;
 241 }
 242 static inline struct tm *gmtime_r (const time_t *timep, struct tm *result)
 243 {
 244     struct tm *s = gmtime (timep);
 245     if (s == NULL)
 246         return NULL;
 247
 248     *result = *s;
 249     return result;
 250 }
 251 #endif
 252
 253 /* Alignment of critical static data structures */
 254 #ifdef ATTRIBUTE_ALIGNED_MAX
 255 #   define ATTR_ALIGN(align) __attribute__ ((__aligned__ ((ATTRIBUTE_ALIGNED_MAX < align) ? ATTRIBUTE_ALIGNED_MAX : align)))
 256 #else
 257 #   define ATTR_ALIGN(align)
 258 #endif
 259
 260 #ifndef HAVE_USELOCALE
 261 typedef void *locale_t;
 262 # define newlocale( a, b, c ) ((locale_t)0)
 263 # define uselocale( a ) ((locale_t)0)
 264 # define freelocale( a ) (void)0
 265 #endif
 266
 267 #ifdef WIN32
 268 # include <dirent.h>
 269 # define opendir Use_utf8_opendir_or_vlc_wopendir_instead!
 270 # define readdir Use_utf8_readdir_or_vlc_wreaddir_instead!
 271 # define closedir vlc_wclosedir
 272 #endif
 273
 274 /* libintl support */
 275 #define _(str) vlc_gettext (str)
 276
 277 #if defined (ENABLE_NLS)
 278 # include <libintl.h>
 279 #endif
 280
 281 #define N_(str) gettext_noop (str)
 282 #define gettext_noop(str) (str)
 283
 284 #ifdef UNDER_CE
 285 static inline void rewind ( FILE *stream )
 286 {
 287     fseek(stream, 0L, SEEK_SET);
 288     clearerr(stream);
 289 }
 290 #endif
 291
 292 #endif /* !LIBVLC_FIXUPS_H */