1 /* $NetBSD: decode.c,v 1.2 2024/02/27 21:05:34 gson Exp $ */
2
3 /*
4 * Copyright (c) 1999 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30
31 #ifndef lint
32 __RCSID("$NetBSD: decode.c,v 1.2 2024/02/27 21:05:34 gson Exp $");
33 #endif
34
35 #include <sys/types.h>
36 #include <sys/time.h>
37
38 #include <ctype.h>
39 #include <string.h>
40 #include <stdlib.h>
41 #include <limits.h>
42 #include <err.h>
43
44 #include "libaudio.h"
45
46 void
decode_int(const char * arg,int * intp)47 decode_int(const char *arg, int *intp)
48 {
49 char *ep;
50 int ret;
51
52 ret = (int)strtoul(arg, &ep, 10);
53
54 if (ep[0] == '\0') {
55 *intp = ret;
56 return;
57 }
58 errx(1, "argument `%s' not a valid integer", arg);
59 }
60
61 void
decode_uint(const char * arg,unsigned * intp)62 decode_uint(const char *arg, unsigned *intp)
63 {
64 char *ep;
65 unsigned ret;
66
67 ret = (unsigned)strtoul(arg, &ep, 10);
68
69 if (ep[0] == '\0') {
70 *intp = ret;
71 return;
72 }
73 errx(1, "argument `%s' not a valid integer", arg);
74 }
75
76 void
decode_time(const char * arg,struct timeval * tvp)77 decode_time(const char *arg, struct timeval *tvp)
78 {
79 char *s, *colon, *dot;
80 char *copy = strdup(arg);
81 int first;
82
83 if (copy == NULL)
84 err(1, "could not allocate a copy of %s", arg);
85
86 tvp->tv_sec = tvp->tv_usec = 0;
87 s = copy;
88
89 /* handle [hh:]mm:ss.dd */
90 if ((colon = strchr(s, ':')) != NULL) {
91 *colon++ = '\0';
92 decode_int(s, &first);
93 tvp->tv_sec = first * 60; /* minutes */
94 s = colon;
95
96 if ((colon = strchr(s, ':')) != NULL) {
97 *colon++ = '\0';
98 decode_int(s, &first);
99 tvp->tv_sec += first; /* minutes and hours */
100 tvp->tv_sec *= 60;
101 s = colon;
102 }
103 }
104 if ((dot = strchr(s, '.')) != NULL) {
105 int i, base = 100000;
106
107 *dot++ = '\0';
108
109 for (i = 0; i < 6; i++, base /= 10) {
110 if (!dot[i])
111 break;
112 if (!isdigit((unsigned char)dot[i]))
113 errx(1, "argument `%s' is not a value time specification", arg);
114 tvp->tv_usec += base * (dot[i] - '0');
115 }
116 }
117 decode_int(s, &first);
118 tvp->tv_sec += first;
119
120 free(copy);
121 }
122