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 <ctype.h> 33 #include <err.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <xlocale.h> 37 38 #include "psdate.h" 39 40 41 static int 42 numerics(char const * str) 43 { 44 int rc = isdigit((unsigned char)*str); 45 46 if (rc) 47 while (isdigit((unsigned char)*str) || *str == 'x') 48 ++str; 49 return rc && !*str; 50 } 51 52 static int 53 aindex(char const * arr[], char const ** str, int len) 54 { 55 int l, i; 56 char mystr[32]; 57 58 mystr[len] = '\0'; 59 l = strlen(strncpy(mystr, *str, len)); 60 for (i = 0; i < l; i++) 61 mystr[i] = (char) tolower((unsigned char)mystr[i]); 62 for (i = 0; arr[i] && strcmp(mystr, arr[i]) != 0; i++); 63 if (arr[i] == NULL) 64 i = -1; 65 else { /* Skip past it */ 66 while (**str && isalpha((unsigned char)**str)) 67 ++(*str); 68 /* And any following whitespace */ 69 while (**str && (**str == ',' || isspace((unsigned char)**str))) 70 ++(*str); 71 } /* Return index */ 72 return i; 73 } 74 75 static int 76 weekday(char const ** str) 77 { 78 static char const *days[] = 79 {"sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL}; 80 81 return aindex(days, str, 3); 82 } 83 84 static void 85 parse_datesub(char const * str, struct tm *t) 86 { 87 struct tm tm; 88 locale_t l; 89 int i; 90 char *ret; 91 const char *valid_formats[] = { 92 "%d-%b-%y", 93 "%d-%b-%Y", 94 "%d-%m-%y", 95 "%d-%m-%Y", 96 "%H:%M %d-%b-%y", 97 "%H:%M %d-%b-%Y", 98 "%H:%M %d-%m-%y", 99 "%H:%M %d-%m-%Y", 100 "%H:%M:%S %d-%b-%y", 101 "%H:%M:%S %d-%b-%Y", 102 "%H:%M:%S %d-%m-%y", 103 "%H:%M:%S %d-%m-%Y", 104 "%d-%b-%y %H:%M", 105 "%d-%b-%Y %H:%M", 106 "%d-%m-%y %H:%M", 107 "%d-%m-%Y %H:%M", 108 "%d-%b-%y %H:%M:%S", 109 "%d-%b-%Y %H:%M:%S", 110 "%d-%m-%y %H:%M:%S", 111 "%d-%m-%Y %H:%M:%S", 112 "%H:%M\t%d-%b-%y", 113 "%H:%M\t%d-%b-%Y", 114 "%H:%M\t%d-%m-%y", 115 "%H:%M\t%d-%m-%Y", 116 "%H:%M\t%S %d-%b-%y", 117 "%H:%M\t%S %d-%b-%Y", 118 "%H:%M\t%S %d-%m-%y", 119 "%H:%M\t%S %d-%m-%Y", 120 "%d-%b-%y\t%H:%M", 121 "%d-%b-%Y\t%H:%M", 122 "%d-%m-%y\t%H:%M", 123 "%d-%m-%Y\t%H:%M", 124 "%d-%b-%y\t%H:%M:%S", 125 "%d-%b-%Y\t%H:%M:%S", 126 "%d-%m-%y\t%H:%M:%S", 127 "%d-%m-%Y\t%H:%M:%S", 128 NULL, 129 }; 130 131 l = newlocale(LC_ALL_MASK, "C", NULL); 132 133 memset(&tm, 0, sizeof(tm)); 134 for (i=0; valid_formats[i] != NULL; i++) { 135 ret = strptime_l(str, valid_formats[i], &tm, l); 136 if (ret && *ret == '\0') { 137 t->tm_mday = tm.tm_mday; 138 t->tm_mon = tm.tm_mon; 139 t->tm_year = tm.tm_year; 140 t->tm_hour = tm.tm_hour; 141 t->tm_min = tm.tm_min; 142 t->tm_sec = tm.tm_sec; 143 freelocale(l); 144 return; 145 } 146 } 147 148 freelocale(l); 149 150 errx(EXIT_FAILURE, "Invalid date"); 151 } 152 153 154 /*- 155 * Parse time must be flexible, it handles the following formats: 156 * nnnnnnnnnnn UNIX timestamp (all numeric), 0 = now 157 * 0xnnnnnnnn UNIX timestamp in hexadecimal 158 * 0nnnnnnnnn UNIX timestamp in octal 159 * 0 Given time 160 * +nnnn[smhdwoy] Given time + nnnn hours, mins, days, weeks, months or years 161 * -nnnn[smhdwoy] Given time - nnnn hours, mins, days, weeks, months or years 162 * dd[ ./-]mmm[ ./-]yy Date } 163 * hh:mm:ss Time } May be combined 164 */ 165 166 time_t 167 parse_date(time_t dt, char const * str) 168 { 169 char *p; 170 int i; 171 long val; 172 struct tm *T; 173 174 if (dt == 0) 175 dt = time(NULL); 176 177 while (*str && isspace((unsigned char)*str)) 178 ++str; 179 180 if (numerics(str)) { 181 dt = strtol(str, &p, 0); 182 } else if (*str == '+' || *str == '-') { 183 val = strtol(str, &p, 0); 184 switch (*p) { 185 case 'h': 186 case 'H': /* hours */ 187 dt += (val * 3600L); 188 break; 189 case '\0': 190 case 'm': 191 case 'M': /* minutes */ 192 dt += (val * 60L); 193 break; 194 case 's': 195 case 'S': /* seconds */ 196 dt += val; 197 break; 198 case 'd': 199 case 'D': /* days */ 200 dt += (val * 86400L); 201 break; 202 case 'w': 203 case 'W': /* weeks */ 204 dt += (val * 604800L); 205 break; 206 case 'o': 207 case 'O': /* months */ 208 T = localtime(&dt); 209 T->tm_mon += (int) val; 210 i = T->tm_mday; 211 goto fixday; 212 case 'y': 213 case 'Y': /* years */ 214 T = localtime(&dt); 215 T->tm_year += (int) val; 216 i = T->tm_mday; 217 fixday: 218 dt = mktime(T); 219 T = localtime(&dt); 220 if (T->tm_mday != i) { 221 T->tm_mday = 1; 222 dt = mktime(T); 223 dt -= (time_t) 86400L; 224 } 225 default: /* unknown */ 226 break; /* leave untouched */ 227 } 228 } else { 229 char *q, tmp[64]; 230 231 /* 232 * Skip past any weekday prefix 233 */ 234 weekday(&str); 235 strlcpy(tmp, str, sizeof(tmp)); 236 str = tmp; 237 T = localtime(&dt); 238 239 /* 240 * See if we can break off any timezone 241 */ 242 while ((q = strrchr(tmp, ' ')) != NULL) { 243 if (strchr("(+-", q[1]) != NULL) 244 *q = '\0'; 245 else { 246 int j = 1; 247 248 while (q[j] && isupper((unsigned char)q[j])) 249 ++j; 250 if (q[j] == '\0') 251 *q = '\0'; 252 else 253 break; 254 } 255 } 256 257 parse_datesub(tmp, T); 258 dt = mktime(T); 259 } 260 return dt; 261 } 262