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 a2i(char const ** str) 44 { 45 int i = 0; 46 char const *s = *str; 47 48 if (isdigit((unsigned char)*s)) { 49 i = atoi(s); 50 while (isdigit((unsigned char)*s)) 51 ++s; 52 *str = s; 53 } 54 return i; 55 } 56 57 static int 58 numerics(char const * str) 59 { 60 int rc = isdigit((unsigned char)*str); 61 62 if (rc) 63 while (isdigit((unsigned char)*str) || *str == 'x') 64 ++str; 65 return rc && !*str; 66 } 67 68 static int 69 aindex(char const * arr[], char const ** str, int len) 70 { 71 int l, i; 72 char mystr[32]; 73 74 mystr[len] = '\0'; 75 l = strlen(strncpy(mystr, *str, len)); 76 for (i = 0; i < l; i++) 77 mystr[i] = (char) tolower((unsigned char)mystr[i]); 78 for (i = 0; arr[i] && strcmp(mystr, arr[i]) != 0; i++); 79 if (arr[i] == NULL) 80 i = -1; 81 else { /* Skip past it */ 82 while (**str && isalpha((unsigned char)**str)) 83 ++(*str); 84 /* And any following whitespace */ 85 while (**str && (**str == ',' || isspace((unsigned char)**str))) 86 ++(*str); 87 } /* Return index */ 88 return i; 89 } 90 91 static int 92 weekday(char const ** str) 93 { 94 static char const *days[] = 95 {"sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL}; 96 97 return aindex(days, str, 3); 98 } 99 100 static void 101 parse_datesub(char const * str, struct tm *t) 102 { 103 struct tm tm; 104 locale_t l; 105 int i; 106 char *ret; 107 const char *valid_formats[] = { 108 "%d-%b-%y", 109 "%d-%b-%Y", 110 "%d-%m-%y", 111 "%d-%m-%Y", 112 "%H:%M %d-%b-%y", 113 "%H:%M %d-%b-%Y", 114 "%H:%M %d-%m-%y", 115 "%H:%M %d-%m-%Y", 116 "%H:%M:%S %d-%b-%y", 117 "%H:%M:%S %d-%b-%Y", 118 "%H:%M:%S %d-%m-%y", 119 "%H:%M:%S %d-%m-%Y", 120 "%d-%b-%y %H:%M", 121 "%d-%b-%Y %H:%M", 122 "%d-%m-%y %H:%M", 123 "%d-%m-%Y %H:%M", 124 "%d-%b-%y %H:%M:%S", 125 "%d-%b-%Y %H:%M:%S", 126 "%d-%m-%y %H:%M:%S", 127 "%d-%m-%Y %H:%M:%S", 128 "%H:%M\t%d-%b-%y", 129 "%H:%M\t%d-%b-%Y", 130 "%H:%M\t%d-%m-%y", 131 "%H:%M\t%d-%m-%Y", 132 "%H:%M\t%S %d-%b-%y", 133 "%H:%M\t%S %d-%b-%Y", 134 "%H:%M\t%S %d-%m-%y", 135 "%H:%M\t%S %d-%m-%Y", 136 "%d-%b-%y\t%H:%M", 137 "%d-%b-%Y\t%H:%M", 138 "%d-%m-%y\t%H:%M", 139 "%d-%m-%Y\t%H:%M", 140 "%d-%b-%y\t%H:%M:%S", 141 "%d-%b-%Y\t%H:%M:%S", 142 "%d-%m-%y\t%H:%M:%S", 143 "%d-%m-%Y\t%H:%M:%S", 144 NULL, 145 }; 146 147 l = newlocale(LC_ALL_MASK, "C", NULL); 148 149 memset(&tm, 0, sizeof(tm)); 150 for (i=0; valid_formats[i] != NULL; i++) { 151 ret = strptime_l(str, valid_formats[i], &tm, l); 152 if (ret && *ret == '\0') { 153 t->tm_mday = tm.tm_mday; 154 t->tm_mon = tm.tm_mon; 155 t->tm_year = tm.tm_year; 156 t->tm_hour = tm.tm_hour; 157 t->tm_min = tm.tm_min; 158 t->tm_sec = tm.tm_sec; 159 freelocale(l); 160 return; 161 } 162 } 163 164 freelocale(l); 165 166 errx(EXIT_FAILURE, "Invalid date"); 167 } 168 169 170 /*- 171 * Parse time must be flexible, it handles the following formats: 172 * nnnnnnnnnnn UNIX timestamp (all numeric), 0 = now 173 * 0xnnnnnnnn UNIX timestamp in hexadecimal 174 * 0nnnnnnnnn UNIX timestamp in octal 175 * 0 Given time 176 * +nnnn[smhdwoy] Given time + nnnn hours, mins, days, weeks, months or years 177 * -nnnn[smhdwoy] Given time - nnnn hours, mins, days, weeks, months or years 178 * dd[ ./-]mmm[ ./-]yy Date } 179 * hh:mm:ss Time } May be combined 180 */ 181 182 time_t 183 parse_date(time_t dt, char const * str) 184 { 185 char *p; 186 int i; 187 long val; 188 struct tm *T; 189 190 if (dt == 0) 191 dt = time(NULL); 192 193 while (*str && isspace((unsigned char)*str)) 194 ++str; 195 196 if (numerics(str)) { 197 dt = strtol(str, &p, 0); 198 } else if (*str == '+' || *str == '-') { 199 val = strtol(str, &p, 0); 200 switch (*p) { 201 case 'h': 202 case 'H': /* hours */ 203 dt += (val * 3600L); 204 break; 205 case '\0': 206 case 'm': 207 case 'M': /* minutes */ 208 dt += (val * 60L); 209 break; 210 case 's': 211 case 'S': /* seconds */ 212 dt += val; 213 break; 214 case 'd': 215 case 'D': /* days */ 216 dt += (val * 86400L); 217 break; 218 case 'w': 219 case 'W': /* weeks */ 220 dt += (val * 604800L); 221 break; 222 case 'o': 223 case 'O': /* months */ 224 T = localtime(&dt); 225 T->tm_mon += (int) val; 226 i = T->tm_mday; 227 goto fixday; 228 case 'y': 229 case 'Y': /* years */ 230 T = localtime(&dt); 231 T->tm_year += (int) val; 232 i = T->tm_mday; 233 fixday: 234 dt = mktime(T); 235 T = localtime(&dt); 236 if (T->tm_mday != i) { 237 T->tm_mday = 1; 238 dt = mktime(T); 239 dt -= (time_t) 86400L; 240 } 241 default: /* unknown */ 242 break; /* leave untouched */ 243 } 244 } else { 245 char *q, tmp[64]; 246 247 /* 248 * Skip past any weekday prefix 249 */ 250 weekday(&str); 251 strlcpy(tmp, str, sizeof(tmp)); 252 str = tmp; 253 T = localtime(&dt); 254 255 /* 256 * See if we can break off any timezone 257 */ 258 while ((q = strrchr(tmp, ' ')) != NULL) { 259 if (strchr("(+-", q[1]) != NULL) 260 *q = '\0'; 261 else { 262 int j = 1; 263 264 while (q[j] && isupper((unsigned char)q[j])) 265 ++j; 266 if (q[j] == '\0') 267 *q = '\0'; 268 else 269 break; 270 } 271 } 272 273 parse_datesub(tmp, T); 274 dt = mktime(T); 275 } 276 return dt; 277 } 278