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