utils.h

   1 /* Utility functions
   2  *
   3  * Project : minidlna
   4  * Website : http://sourceforge.net/projects/minidlna/
   5  * Author  : Justin Maggard
   6  *
   7  * MiniDLNA media server
   8  * Copyright (C) 2008-2017  Justin Maggard
   9  *
  10  * This file is part of MiniDLNA.
  11  *
  12  * MiniDLNA is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15  *
  16  * MiniDLNA 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.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with MiniDLNA. If not, see <http://www.gnu.org/licenses/>.
  23  */
  24 #ifndef __UTILS_H__
  25 #define __UTILS_H__
  26
  27 #include <stdarg.h>
  28 #include <dirent.h>
  29 #include <sys/param.h>
  30
  31 #include "minidlnatypes.h"
  32
  33 /* String functions */
  34 /* We really want this one inlined, since it has a major performance impact */
  35 static inline int
  36 __attribute__((__format__ (__printf__, 2, 3)))
  37 strcatf(struct string_s *str, const char *fmt, ...)
  38 {
  39         int ret;
  40         int size;
  41         va_list ap;
  42
  43         if (str->off >= str->size)
  44                 return 0;
  45
  46         va_start(ap, fmt);
  47         size = str->size - str->off;
  48         ret = vsnprintf(str->data + str->off, size, fmt, ap);
  49         str->off += MIN(ret, size);
  50         va_end(ap);
  51
  52         return ret;
  53 }
  54 static inline void strncpyt(char *dst, const char *src, size_t len)
  55 {
  56         strncpy(dst, src, --len);
  57         dst[len] = '\0';
  58 }
  59 static inline int is_reg(const struct dirent *d)
  60 {
  61 #if HAVE_STRUCT_DIRENT_D_TYPE
  62         return (d->d_type == DT_REG);
  63 #else
  64         return -1;
  65 #endif
  66 }
  67 static inline int is_dir(const struct dirent *d)
  68 {
  69 #if HAVE_STRUCT_DIRENT_D_TYPE
  70         return (d->d_type == DT_DIR);
  71 #else
  72         return -1;
  73 #endif
  74 }
  75 int xasprintf(char **strp, char *fmt, ...) __attribute__((__format__ (__printf__, 2, 3)));
  76 int ends_with(const char * haystack, const char * needle);
  77 char *trim(char *str);
  78 char *strstrc(const char *s, const char *p, const char t);
  79 char *strcasestrc(const char *s, const char *p, const char t);
  80 char *modifyString(char *string, const char *before, const char *after, int noalloc);
  81 char *escape_tag(const char *tag, int force_alloc);
  82 char *unescape_tag(const char *tag, int force_alloc);
  83 char *duration_str(int msec);
  84 char *strip_ext(char *name);
  85
  86 /* Metadata functions */
  87 int is_video(const char * file);
  88 int is_audio(const char * file);
  89 int is_image(const char * file);
  90 int is_playlist(const char * file);
  91 int is_caption(const char * file);
  92 #define is_nfo(file) ends_with(file, ".nfo")
  93 media_types get_media_type(const char *file);
  94 media_types valid_media_types(const char *path);
  95
  96 int is_album_art(const char * name);
  97 int resolve_unknown_type(const char * path, media_types dir_type);
  98 const char *mime_to_ext(const char * mime);
  99
 100 /* Others */
 101 int make_dir(char * path, mode_t mode);
 102 unsigned int DJBHash(uint8_t *data, int len);
 103
 104 /* Timeval manipulations */
 105 void    timevaladd(struct timeval *t1, const struct timeval *t2);
 106 void    timevalsub(struct timeval *t1, const struct timeval *t2);
 107 #define timevalcmp(tvp, uvp, cmp)                                       \
 108         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 109             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 110             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 111
 112 #endif