1 /* $NetBSD: ns_ttl.c,v 1.2 2004/05/20 20:35:05 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (c) 1996,1999 by Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 #ifndef lint 22 #ifdef notdef 23 static const char rcsid[] = "Id: ns_ttl.c,v 1.1.206.1 2004/03/09 08:33:45 marka Exp"; 24 #else 25 __RCSID("$NetBSD: ns_ttl.c,v 1.2 2004/05/20 20:35:05 christos Exp $"); 26 #endif 27 #endif 28 29 /* Import. */ 30 31 #include "arpa_nameser.h" 32 33 #include <ctype.h> 34 #include <errno.h> 35 #include <stdio.h> 36 #include <string.h> 37 38 #ifdef SPRINTF_CHAR 39 # define SPRINTF(x) strlen(sprintf/**/x) 40 #else 41 # define SPRINTF(x) ((size_t)sprintf x) 42 #endif 43 44 /* Forward. */ 45 46 static int fmt1(int t, char s, char **buf, size_t *buflen); 47 48 /* Macros. */ 49 50 #define T(x) do { if ((x) < 0) return (-1); } while(0) 51 52 /* Public. */ 53 54 int 55 ns_format_ttl(u_long src, char *dst, size_t dstlen) { 56 char *odst = dst; 57 int secs, mins, hours, days, weeks, x; 58 char *p; 59 60 secs = src % 60; src /= 60; 61 mins = src % 60; src /= 60; 62 hours = src % 24; src /= 24; 63 days = src % 7; src /= 7; 64 weeks = src; src = 0; 65 66 x = 0; 67 if (weeks) { 68 T(fmt1(weeks, 'W', &dst, &dstlen)); 69 x++; 70 } 71 if (days) { 72 T(fmt1(days, 'D', &dst, &dstlen)); 73 x++; 74 } 75 if (hours) { 76 T(fmt1(hours, 'H', &dst, &dstlen)); 77 x++; 78 } 79 if (mins) { 80 T(fmt1(mins, 'M', &dst, &dstlen)); 81 x++; 82 } 83 if (secs || !(weeks || days || hours || mins)) { 84 T(fmt1(secs, 'S', &dst, &dstlen)); 85 x++; 86 } 87 88 if (x > 1) { 89 int ch; 90 91 for (p = odst; (ch = *p) != '\0'; p++) 92 if (isascii(ch) && isupper(ch)) 93 *p = tolower(ch); 94 } 95 96 return (dst - odst); 97 } 98 99 #ifndef _LIBC 100 int 101 ns_parse_ttl(const char *src, u_long *dst) { 102 u_long ttl, tmp; 103 int ch, digits, dirty; 104 105 ttl = 0; 106 tmp = 0; 107 digits = 0; 108 dirty = 0; 109 while ((ch = *src++) != '\0') { 110 if (!isascii(ch) || !isprint(ch)) 111 goto einval; 112 if (isdigit(ch)) { 113 tmp *= 10; 114 tmp += (ch - '0'); 115 digits++; 116 continue; 117 } 118 if (digits == 0) 119 goto einval; 120 if (islower(ch)) 121 ch = toupper(ch); 122 switch (ch) { 123 case 'W': tmp *= 7; /*FALLTHROUGH*/ 124 case 'D': tmp *= 24; /*FALLTHROUGH*/ 125 case 'H': tmp *= 60; /*FALLTHROUGH*/ 126 case 'M': tmp *= 60; /*FALLTHROUGH*/ 127 case 'S': break; 128 default: goto einval; 129 } 130 ttl += tmp; 131 tmp = 0; 132 digits = 0; 133 dirty = 1; 134 } 135 if (digits > 0) { 136 if (dirty) 137 goto einval; 138 else 139 ttl += tmp; 140 } 141 *dst = ttl; 142 return (0); 143 144 einval: 145 errno = EINVAL; 146 return (-1); 147 } 148 #endif 149 150 /* Private. */ 151 152 static int 153 fmt1(int t, char s, char **buf, size_t *buflen) { 154 char tmp[50]; 155 size_t len; 156 157 len = SPRINTF((tmp, "%d%c", t, s)); 158 if (len + 1 > *buflen) 159 return (-1); 160 strcpy(*buf, tmp); 161 *buf += len; 162 *buflen -= len; 163 return (0); 164 } 165
