1 /* $NetBSD: conv_time.c,v 1.3 2025/02/25 19:15:45 christos Exp $ */
2
3 /*++
4 /* NAME
5 /* conv_time 3
6 /* SUMMARY
7 /* time value conversion
8 /* SYNOPSIS
9 /* #include <conv_time.h>
10 /*
11 /* int conv_time(strval, timval, def_unit);
12 /* const char *strval;
13 /* int *timval;
14 /* int def_unit;
15 /* DESCRIPTION
16 /* conv_time() converts a numerical time value with optional
17 /* one-letter suffix that specifies an explicit time unit: s
18 /* (seconds), m (minutes), h (hours), d (days) or w (weeks).
19 /* Internally, time is represented in seconds.
20 /*
21 /* Arguments:
22 /* .IP strval
23 /* Input value.
24 /* .IP timval
25 /* Result pointer.
26 /* .IP def_unit
27 /* The default time unit suffix character.
28 /* DIAGNOSTICS
29 /* The result value is non-zero in case of success, zero in
30 /* case of a bad time value or a bad time unit suffix.
31 /* LICENSE
32 /* .ad
33 /* .fi
34 /* The Secure Mailer license must be distributed with this software.
35 /* AUTHOR(S)
36 /* Wietse Venema
37 /* IBM T.J. Watson Research
38 /* P.O. Box 704
39 /* Yorktown Heights, NY 10598, USA
40 /*
41 /* Wietse Venema
42 /* Google, Inc.
43 /* 111 8th Avenue
44 /* New York, NY 10011, USA
45 /*--*/
46
47 /* System library. */
48
49 #include <sys_defs.h>
50 #include <limits.h> /* INT_MAX */
51 #include <stdlib.h>
52 #include <errno.h>
53
54 /* Utility library. */
55
56 #include <msg.h>
57
58 /* Global library. */
59
60 #include <conv_time.h>
61
62 #define MINUTE (60)
63 #define HOUR (60 * MINUTE)
64 #define DAY (24 * HOUR)
65 #define WEEK (7 * DAY)
66
67 /* conv_time - convert time value */
68
conv_time(const char * strval,int * timval,int def_unit)69 int conv_time(const char *strval, int *timval, int def_unit)
70 {
71 char *end;
72 int intval;
73 long longval;
74
75 errno = 0;
76 intval = longval = strtol(strval, &end, 10);
77 if (*strval == 0 || errno == ERANGE || longval != intval || intval < 0
78 /* || (*end != 0 && end[1] != 0) */ )
79 return (0);
80
81 switch (*end ? *end : def_unit) {
82 case 'w':
83 if (intval < INT_MAX / WEEK) {
84 *timval = intval * WEEK;
85 return (1);
86 } else {
87 return (0);
88 }
89 case 'd':
90 if (intval < INT_MAX / DAY) {
91 *timval = intval * DAY;
92 return (1);
93 } else {
94 return (0);
95 }
96 case 'h':
97 if (intval < INT_MAX / HOUR) {
98 *timval = intval * HOUR;
99 return (1);
100 } else {
101 return (0);
102 }
103 case 'm':
104 if (intval < INT_MAX / MINUTE) {
105 *timval = intval * MINUTE;
106 return (1);
107 } else {
108 return (0);
109 }
110 case 's':
111 *timval = intval;
112 return (1);
113 }
114 return (0);
115 }
116