1 /*- 2 * Copyright (C) 1996 3 * David L. Nugent. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #ifndef lint 28 static const char rcsid[] = 29 "$FreeBSD$"; 30 #endif /* not lint */ 31 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <ctype.h> 36 #include <xlocale.h> 37 #include <err.h> 38 39 #include "psdate.h" 40 41 42 static int 43 numerics(char const * str) 44 { 45 int rc = isdigit((unsigned char)*str); 46 47 if (rc) 48 while (isdigit((unsigned char)*str) || *str == 'x') 49 ++str; 50 return rc && !*str; 51 } 52 53 static int 54 aindex(char const * arr[], char const ** str, int len) 55 { 56 int l, i; 57 char mystr[32]; 58 59 mystr[len] = '\0'; 60 l = strlen(strncpy(mystr, *str, len)); 61 for (i = 0; i < l; i++) 62 mystr[i] = (char) tolower((unsigned char)mystr[i]); 63 for (i = 0; arr[i] && strcmp(mystr, arr[i]) != 0; i++); 64 if (arr[i] == NULL) 65 i = -1; 66 else { /* Skip past it */ 67 while (**str && isalpha((unsigned char)**str)) 68 ++(*str); 69 /* And any following whitespace */ 70 while (**str && (**str == ',' || isspace((unsigned char)**str))) 71 ++(*str); 72 } /* Return index */ 73 return i; 74 } 75 76 static int 77 weekday(char const ** str) 78 { 79 static char const *days[] = 80 {"sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL}; 81 82 return aindex(days, str, 3); 83 } 84 85 static void 86 parse_datesub(char const * str, struct tm *t) 87 { 88 struct tm tm; 89 locale_t l; 90 int i; 91 char *ret; 92 const char *valid_formats[] = { 93 "%d-%b-%y", 94 "%d-%b-%Y", 95 "%d-%m-%y", 96 "%d-%m-%Y", 97 "%H:%M %d-%b-%y", 98 "%H:%M %d-%b-%Y", 99 "%H:%M %d-%m-%y", 100 "%H:%M %d-%m-%Y", 101 "%H:%M:%S %d-%b-%y", 102 "%H:%M:%S %d-%b-%Y", 103 "%H:%M:%S %d-%m-%y", 104 "%H:%M:%S %d-%m-%Y", 105 "%d-%b-%y %H:%M", 106 "%d-%b-%Y %H:%M", 107 "%d-%m-%y %H:%M", 108 "%d-%m-%Y %H:%M", 109 "%d-%b-%y %H:%M:%S", 110 "%d-%b-%Y %H:%M:%S", 111 "%d-%m-%y %H:%M:%S", 112 "%d-%m-%Y %H:%M:%S", 113 "%H:%M\t%d-%b-%y", 114 "%H:%M\t%d-%b-%Y", 115 "%H:%M\t%d-%m-%y", 116 "%H:%M\t%d-%m-%Y", 117 "%H:%M\t%S %d-%b-%y", 118 "%H:%M\t%S %d-%b-%Y", 119 "%H:%M\t%S %d-%m-%y", 120 "%H:%M\t%S %d-%m-%Y", 121 "%d-%b-%y\t%H:%M", 122 "%d-%b-%Y\t%H:%M", 123 "%d-%m-%y\t%H:%M", 124 "%d-%m-%Y\t%H:%M", 125 "%d-%b-%y\t%H:%M:%S", 126 "%d-%b-%Y\t%H:%M:%S", 127 "%d-%m-%y\t%H:%M:%S", 128 "%d-%m-%Y\t%H:%M:%S", 129 NULL, 130 }; 131 132 l = newlocale(LC_ALL_MASK, "C", NULL); 133 134 memset(&tm, 0, sizeof(tm)); 135 for (i=0; valid_formats[i] != NULL; i++) { 136 ret = strptime_l(str, valid_formats[i], &tm, l); 137 if (ret && *ret == '\0') { 138 t->tm_mday = tm.tm_mday; 139 t->tm_mon = tm.tm_mon; 140 t->tm_year = tm.tm_year; 141 t->tm_hour = tm.tm_hour; 142 t->tm_min = tm.tm_min; 143 t->tm_sec = tm.tm_sec; 144 freelocale(l); 145 return; 146 } 147 } 148 149 freelocale(l); 150 151 errx(EXIT_FAILURE, "Invalid date"); 152 } 153 154 155 /*- 156 * Parse time must be flexible, it handles the following formats: 157 * nnnnnnnnnnn UNIX timestamp (all numeric), 0 = now 158 * 0xnnnnnnnn UNIX timestamp in hexadecimal 159 * 0nnnnnnnnn UNIX timestamp in octal 160 * 0 Given time 161 * +nnnn[smhdwoy] Given time + nnnn hours, mins, days, weeks, months or years 162 * -nnnn[smhdwoy] Given time - nnnn hours, mins, days, weeks, months or years 163 * dd[ ./-]mmm[ ./-]yy Date } 164 * hh:mm:ss Time } May be combined 165 */ 166 167 time_t 168 parse_date(time_t dt, char const * str) 169 { 170 char *p; 171 int i; 172 long val; 173 struct tm *T; 174 175 if (dt == 0) 176 dt = time(NULL); 177 178 while (*str && isspace((unsigned char)*str)) 179 ++str; 180 181 if (numerics(str)) { 182 dt = strtol(str, &p, 0); 183 } else if (*str == '+' || *str == '-') { 184 val = strtol(str, &p, 0); 185 switch (*p) { 186 case 'h': 187 case 'H': /* hours */ 188 dt += (val * 3600L); 189 break; 190 case '\0': 191 case 'm': 192 case 'M': /* minutes */ 193 dt += (val * 60L); 194 break; 195 case 's': 196 case 'S': /* seconds */ 197 dt += val; 198 break; 199 case 'd': 200 case 'D': /* days */ 201 dt += (val * 86400L); 202 break; 203 case 'w': 204 case 'W': /* weeks */ 205 dt += (val * 604800L); 206 break; 207 case 'o': 208 case 'O': /* months */ 209 T = localtime(&dt); 210 T->tm_mon += (int) val; 211 i = T->tm_mday; 212 goto fixday; 213 case 'y': 214 case 'Y': /* years */ 215 T = localtime(&dt); 216 T->tm_year += (int) val; 217 i = T->tm_mday; 218 fixday: 219 dt = mktime(T); 220 T = localtime(&dt); 221 if (T->tm_mday != i) { 222 T->tm_mday = 1; 223 dt = mktime(T); 224 dt -= (time_t) 86400L; 225 } 226 default: /* unknown */ 227 break; /* leave untouched */ 228 } 229 } else { 230 char *q, tmp[64]; 231 232 /* 233 * Skip past any weekday prefix 234 */ 235 weekday(&str); 236 strlcpy(tmp, str, sizeof(tmp)); 237 str = tmp; 238 T = localtime(&dt); 239 240 /* 241 * See if we can break off any timezone 242 */ 243 while ((q = strrchr(tmp, ' ')) != NULL) { 244 if (strchr("(+-", q[1]) != NULL) 245 *q = '\0'; 246 else { 247 int j = 1; 248 249 while (q[j] && isupper((unsigned char)q[j])) 250 ++j; 251 if (q[j] == '\0') 252 *q = '\0'; 253 else 254 break; 255 } 256 } 257 258 parse_datesub(tmp, T); 259 dt = mktime(T); 260 } 261 return dt; 262 } 263