tools.c

   1 /*-
   2  * "THE BEER-WARE LICENSE" (Revision 42):
   3  * <tobias.rehbein@web.de> wrote this file. As long as you retain this notice
   4  * you can do whatever you want with this stuff. If we meet some day, and you
   5  * think this stuff is worth it, you can buy me a beer in return.
   6  *                                                              Tobias Rehbein
   7  */
   8
   9 #define _POSIX_C_SOURCE 199506
  10
  11 #include <assert.h>
  12 #include <stdarg.h>
  13 #include <stdlib.h>
  14
  15 #include "tools.h"
  16
  17 int
  18 tools_catitems(char *outbuf, size_t outbuflen,...)
  19 {
  20         va_list         ap;
  21         char           *op, *ip, *ep;
  22         size_t          ccount;
  23
  24         assert(outbuf != NULL);
  25
  26         if (outbuflen == 0)
  27                 return (0);
  28
  29         op = outbuf;
  30         ep = op + outbuflen - 1;
  31
  32         va_start(ap, outbuflen);
  33         while ((ip = va_arg(ap, char *)) != NULL) {
  34                 while (*ip != '\0' && op < ep) {
  35                         *(op++) = *(ip++);
  36                 }
  37         }
  38         *op = '\0';
  39         va_end(ap);
  40
  41         ccount = op - outbuf + 1;
  42         assert(ccount <= outbuflen);
  43
  44         return (ccount);
  45 }