util.c

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