include/c99_compat.h

   1 // Copyright 2012 Intel Corporation
   2 //
   3 // All rights reserved.
   4 //
   5 // Redistribution and use in source and binary forms, with or without
   6 // modification, are permitted provided that the following conditions are met:
   7 //
   8 // - Redistributions of source code must retain the above copyright notice, this
   9 //   list of conditions and the following disclaimer.
  10 //
  11 // - Redistributions in binary form must reproduce the above copyright notice,
  12 //   this list of conditions and the following disclaimer in the documentation
  13 //   and/or other materials provided with the distribution.
  14 //
  15 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  16 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  19 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25
  26 #pragma once
  27
  28 /*
  29  * C99 restrict keyword
  30  */
  31 #ifndef restrict
  32 #  if defined(__GNUC__)
  33 #    define restrict __restrict__
  34 #  elif defined(_MSC_VER)
  35      /* leave empty to prevent compiler wows - decl vs. def diff */
  36 #    define restrict
  37 #  else
  38 #    define restrict
  39 #  endif
  40 #endif
  41
  42 /*
  43  * C99 inline keyword
  44  */
  45 #ifndef inline
  46 #  if defined(__GNUC__)
  47 #    define inline __inline__
  48 #  elif defined(_MSC_VER)
  49 #    define inline __inline
  50 #  elif defined(__ICL)
  51 #    define inline __inline
  52 #  else
  53 #    define inline
  54 #  endif
  55 #endif
  56
  57 /*
  58  * C99 string manipulation functions - snprintf, strcasecmp
  59  *
  60  * https://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010
  61  */
  62 #if defined(_MSC_VER)
  63 #include <stdarg.h> // for va_start, va_end
  64 #include <stdio.h>  // for _vscprintf, _vscprintf_s
  65 #include <string.h>
  66
  67 #define strcasecmp _stricmp
  68 #define snprintf c99_snprintf
  69 #define vsnprintf c99_vsnprintf
  70
  71 static inline int
  72 c99_vsnprintf(char* str, size_t size, const char* format, va_list ap)
  73 {
  74     int count = -1;
  75
  76     if (size != 0)
  77         count = _vsnprintf_s(str, size, _TRUNCATE, format, ap);
  78     if (count == -1)
  79         count = _vscprintf(format, ap);
  80
  81     return count;
  82 }
  83
  84 static inline int
  85 c99_snprintf(char* str, size_t size, const char* format, ...)
  86 {
  87     int count;
  88     va_list ap;
  89
  90     va_start(ap, format);
  91     count = c99_vsnprintf(str, size, format, ap);
  92     va_end(ap);
  93
  94     return count;
  95 }
  96
  97 #else
  98 #include <strings.h>
  99
 100 #endif
 101
 102 /*
 103  * strerror_r - strictly speaking not C99 function, but it's been around of
 104  * ages in one shape or another.
 105  *
 106  * Under *NIX there are three flavours - XSI-compliant (POSIX.1-2001)
 107  * or not, vs GNU-specific one. The POSIX one is available only under *NIX
 108  * and is guaranteed to be thread-safe (as used in waffle).
 109  * Under Windows the function is not thread-safe and thus it's depreciated.
 110  */
 111 #if defined(_WIN32)
 112 #define strerror_r(errno,buf,len) strerror_s(buf,len,errno)
 113 #endif