asprintf.h

   1 /*
   2  * This is free and unencumbered software released into the public domain.
   3  *
   4  * Anyone is free to copy, modify, publish, use, compile, sell, or
   5  * distribute this software, either in source code form or as a compiled
   6  * binary, for any purpose, commercial or non-commercial, and by any
   7  * means.
   8  *
   9  * In jurisdictions that recognize copyright laws, the author or authors
  10  * of this software dedicate any and all copyright interest in the
  11  * software to the public domain. We make this dedication for the benefit
  12  * of the public at large and to the detriment of our heirs and
  13  * successors. We intend this dedication to be an overt act of
  14  * relinquishment in perpetuity of all present and future rights to this
  15  * software under copyright law.
  16
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  * For more information, please refer to <https://unlicense.org>
  26  */
  27
  28 /* https://git.datadissipation.net */
  29 #ifndef ASPRINTF_H_
  30  #define ASPRINTF_H_            1
  31
  32  #ifdef ASPRINTF_INCLUDE_LIBC
  33   #include <stdarg.h>
  34   #include <stdio.h>
  35   #include <stdlib.h>
  36  #endif /* ASPRINTF_INCLUDE_LIBC */
  37
  38  #ifndef HAVE_ASPRINTF
  39   #define HAVE_ASPRINTF         1
  40   #define asprintf              i_asprintf_
  41   #define vasprintf             i_vasprintf_
  42 int i_vasprintf_(char **strp, const char *fmt, va_list ap);
  43 int i_asprintf_(char **strp, const char *fmt, ...);
  44  #endif /* !HAVE_ASPRINTF */
  45
  46  #ifdef ASPRINTF_IMPLEMENTATION
  47 int
  48 i_vasprintf_(char **strp, const char *fmt, va_list ap)
  49 {
  50         int size;
  51         va_list tp;
  52
  53         va_copy(tp, ap);
  54         size = vsnprintf(NULL, 0, fmt, tp);
  55         va_end(tp);
  56
  57         if (size < 0 || !(*strp = malloc(size + 1)))
  58                 return -1;
  59
  60         return vsnprintf(*strp, size + 1, fmt, ap);
  61 }
  62
  63 int
  64 i_asprintf_(char **strp, const char *fmt, ...)
  65 {
  66         int ret;
  67         va_list ap;
  68
  69         va_start(ap, fmt);
  70         ret = i_vasprintf_(strp, fmt, ap);
  71         va_end(ap);
  72
  73         return ret;
  74 }
  75  #endif /* ASPRINTF_IMPLEMENTATION */
  76 #endif /* !ASPRINTF_H_ */