include/babeltrace/compat/string.h

   1 #ifndef _BABELTRACE_COMPAT_STRING_H
   2 #define _BABELTRACE_COMPAT_STRING_H
   3
   4 /*
   5  * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  */
  25
  26 #include <string.h>
  27
  28 #if !defined(__linux__) || ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !defined(_GNU_SOURCE))
  29
  30 /* XSI-compliant strerror_r */
  31 static inline
  32 int compat_strerror_r(int errnum, char *buf, size_t buflen)
  33 {
  34         return strerror_r(errnum, buf, buflen);
  35 }
  36
  37 #else
  38
  39 /* GNU-compliant strerror_r */
  40 static inline
  41 int compat_strerror_r(int errnum, char *buf, size_t buflen)
  42 {
  43         char *retbuf;
  44
  45         retbuf = strerror_r(errnum, buf, buflen);
  46         if (retbuf != buf)
  47                 strncpy(buf, retbuf, buflen);
  48         buf[buflen - 1] = '\0';
  49         return 0;
  50 }
  51
  52 #endif
  53
  54 #endif /* _BABELTRACE_COMPAT_STRING_H */