util.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <errno.h>
   3 #include <stdarg.h>
   4 #include <stdio.h>
   5 #include <string.h>
   6
   7 #include "util.h"
   8
   9 const char *
  10 bprintf(const char *fmt, ...)
  11 {
  12         va_list ap;
  13         size_t len;
  14
  15         va_start(ap, fmt);
  16         len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
  17         va_end(ap);
  18
  19         if (len >= sizeof(buf)) {
  20                 buf[sizeof(buf)-1] = '\0';
  21         }
  22
  23         return buf;
  24 }
  25
  26 int
  27 pscanf(const char *path, const char *fmt, ...)
  28 {
  29         FILE *fp;
  30         va_list ap;
  31         int n;
  32
  33         if (!(fp = fopen(path, "r"))) {
  34                 fprintf(stderr, "fopen '%s': %s\n", path, strerror(errno));
  35                 return -1;
  36         }
  37         va_start(ap, fmt);
  38         n = vfscanf(fp, fmt, ap);
  39         va_end(ap);
  40         fclose(fp);
  41
  42         return (n == EOF) ? -1 : n;
  43 }