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      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
     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
     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
     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