1 /* $NetBSD: ns_ttl.c,v 1.8 2012/03/13 21:13:39 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 1.4 2005/07/28 06:51:49 marka Exp"; 24 #else 25 __RCSID("$NetBSD: ns_ttl.c,v 1.8 2012/03/13 21:13:39 christos Exp $"); 26 #endif 27 #endif 28 29 /* Import. */ 30 31 #include <arpa/nameser.h> 32 33 #include <assert.h> 34 #include <ctype.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <string.h> 38 39 #ifdef SPRINTF_CHAR 40 # define SPRINTF(x) strlen(sprintf/**/x) 41 #else 42 # define SPRINTF(x) ((size_t)sprintf x) 43 #endif 44 45 /* Forward. */ 46 47 static int fmt1(int t, char s, char **buf, size_t *buflen); 48 49 /* Macros. */ 50 51 #define T(x) do { if ((x) < 0) return (-1); } while(0) 52 53 /* Public. */ 54 55 int 56 ns_format_ttl(u_long src, char *dst, size_t dstlen) { 57 char *odst = dst; 58 int secs, mins, hours, days, weeks, x; 59 char *p; 60 61 secs = (int)(src % 60); src /= 60; 62 mins = (int)(src % 60); src /= 60; 63 hours = (int)(src % 24); src /= 24; 64 days = (int)(src % 7); src /= 7; 65 weeks = (int)src; src = 0; 66 67 x = 0; 68 if (weeks) { 69 T(fmt1(weeks, 'W', &dst, &dstlen)); 70 x++; 71 } 72 if (days) { 73 T(fmt1(days, 'D', &dst, &dstlen)); 74 x++; 75 } 76 if (hours) { 77 T(fmt1(hours, 'H', &dst, &dstlen)); 78 x++; 79 } 80 if (mins) { 81 T(fmt1(mins, 'M', &dst, &dstlen)); 82 x++; 83 } 84 if (secs || !(weeks || days || hours || mins)) { 85 T(fmt1(secs, 'S', &dst, &dstlen)); 86 x++; 87 } 88 89 if (x > 1) { 90 int ch; 91 92 for (p = odst; (ch = *p) != '\0'; p++) 93 if (isascii(ch) && isupper(ch)) 94 *p = tolower(ch); 95 } 96 97 _DIAGASSERT(__type_fit(int, dst - odst)); 98 return (int)(dst - odst); 99 } 100 101 #ifndef _LIBC 102 int 103 ns_parse_ttl(const char *src, u_long *dst) { 104 u_long ttl, tmp; 105 int ch, digits, dirty; 106 107 ttl = 0; 108 tmp = 0; 109 digits = 0; 110 dirty = 0; 111 while ((ch = *src++) != '\0') { 112 if (!isascii(ch) || !isprint(ch)) 113 goto einval; 114 if (isdigit(ch)) { 115 tmp *= 10; 116 tmp += (ch - '0'); 117 digits++; 118 continue; 119 } 120 if (digits == 0) 121 goto einval; 122 if (islower(ch)) 123 ch = toupper(ch); 124 switch (ch) { 125 case 'W': tmp *= 7; /*FALLTHROUGH*/ 126 case 'D': tmp *= 24; /*FALLTHROUGH*/ 127 case 'H': tmp *= 60; /*FALLTHROUGH*/ 128 case 'M': tmp *= 60; /*FALLTHROUGH*/ 129 case 'S': break; 130 default: goto einval; 131 } 132 ttl += tmp; 133 tmp = 0; 134 digits = 0; 135 dirty = 1; 136 } 137 if (digits > 0) { 138 if (dirty) 139 goto einval; 140 else 141 ttl += tmp; 142 } else if (!dirty) 143 goto einval; 144 *dst = ttl; 145 return (0); 146 147 einval: 148 errno = EINVAL; 149 return (-1); 150 } 151 #endif 152 153 /* Private. */ 154 155 static int 156 fmt1(int t, char s, char **buf, size_t *buflen) { 157 char tmp[50]; 158 size_t len; 159 160 len = SPRINTF((tmp, "%d%c", t, s)); 161 if (len + 1 > *buflen) 162 return (-1); 163 strcpy(*buf, tmp); 164 *buf += len; 165 *buflen -= len; 166 return (0); 167 } 168
