bstr.h

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #ifndef MPLAYER_BSTR_H
  20 #define MPLAYER_BSTR_H
  21
  22 #include <stdint.h>
  23 #include <stddef.h>
  24 #include <string.h>
  25 #include <stdbool.h>
  26
  27 #include "talloc.h"
  28
  29 /* NOTE: 'len' is size_t, but most string-handling functions below assume
  30  * that input size has been sanity checked and len fits in an int.
  31  */
  32 struct bstr {
  33     unsigned char *start;
  34     size_t len;
  35 };
  36
  37 int bstrcmp(struct bstr str1, struct bstr str2);
  38 int bstrcasecmp(struct bstr str1, struct bstr str2);
  39 int bstrchr(struct bstr str, int c);
  40 int bstrrchr(struct bstr str, int c);
  41 struct bstr *bstr_splitlines(void *talloc_ctx, struct bstr str);
  42 struct bstr bstr_strip(struct bstr str);
  43 struct bstr bstr_split(struct bstr str, char *sep, struct bstr *rest);
  44 struct bstr bstr_splice(struct bstr str, int start, int end);
  45 long long bstrtoll(struct bstr str, struct bstr *rest, int base);
  46
  47 static inline struct bstr bstr_cut(struct bstr str, int n)
  48 {
  49     return (struct bstr){str.start + n, str.len - n};
  50 }
  51
  52 static inline bool bstr_startswith(struct bstr str, struct bstr prefix)
  53 {
  54     if (str.len < prefix.len)
  55         return false;
  56     return !memcmp(str.start, prefix.start, prefix.len);
  57 }
  58
  59 static inline char *bstrdup0(void *talloc_ctx, struct bstr str)
  60 {
  61     // cast is live555 C++ compilation workaround
  62     return talloc_strndup(talloc_ctx, (char *)str.start, str.len);
  63 }
  64
  65 // Create bstr compound literal from null-terminated string
  66 #define BSTR(s) (struct bstr){(char *)(s), (s) ? strlen(s) : 0}
  67 // create a pair (not single value!) for "%.*s" printf syntax
  68 #define BSTR_P(bstr) (int)((bstr).len), (bstr).start
  69
  70 #define WHITESPACE " \f\n\r\t\v"
  71
  72 #endif /* MPLAYER_BSTR_H */