3 * David L. Nugent. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
28 static const char rcsid[] =
41 a2i(char const ** str)
46 if (isdigit((unsigned char)*s)) {
48 while (isdigit((unsigned char)*s))
56 numerics(char const * str)
58 int rc = isdigit((unsigned char)*str);
61 while (isdigit((unsigned char)*str) || *str == 'x')
67 aindex(char const * arr[], char const ** str, int len)
73 l = strlen(strncpy(mystr, *str, len));
74 for (i = 0; i < l; i++)
75 mystr[i] = (char) tolower((unsigned char)mystr[i]);
76 for (i = 0; arr[i] && strcmp(mystr, arr[i]) != 0; i++);
79 else { /* Skip past it */
80 while (**str && isalpha((unsigned char)**str))
82 /* And any following whitespace */
83 while (**str && (**str == ',' || isspace((unsigned char)**str)))
90 weekday(char const ** str)
92 static char const *days[] =
93 {"sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL};
95 return aindex(days, str, 3);
99 month(char const ** str)
101 static char const *months[] =
102 {"jan", "feb", "mar", "apr", "may", "jun", "jul",
103 "aug", "sep", "oct", "nov", "dec", NULL};
105 return aindex(months, str, 3);
109 parse_time(char const * str, int *hour, int *min, int *sec)
112 if ((str = strchr(str, ':')) == NULL)
117 *sec = ((str = strchr(str, ':')) == NULL) ? 0 : atoi(++str);
123 parse_datesub(char const * str, int *day, int *mon, int *year)
127 static char const nchrs[] = "0123456789 \t,/-.";
129 if ((i = month(&str)) != -1) {
131 if ((i = a2i(&str)) != 0)
133 } else if ((i = a2i(&str)) != 0) {
135 while (*str && strchr(nchrs + 10, *str) != NULL)
137 if ((i = month(&str)) != -1)
139 else if ((i = a2i(&str)) != 0)
144 while (*str && strchr(nchrs + 10, *str) != NULL)
146 if (isdigit((unsigned char)*str)) {
157 * Parse time must be flexible, it handles the following formats:
158 * nnnnnnnnnnn UNIX timestamp (all numeric), 0 = now
159 * 0xnnnnnnnn UNIX timestamp in hexadecimal
160 * 0nnnnnnnnn UNIX timestamp in octal
162 * +nnnn[smhdwoy] Given time + nnnn hours, mins, days, weeks, months or years
163 * -nnnn[smhdwoy] Given time - nnnn hours, mins, days, weeks, months or years
164 * dd[ ./-]mmm[ ./-]yy Date }
165 * hh:mm:ss Time } May be combined
169 parse_date(time_t dt, char const * str)
179 while (*str && isspace((unsigned char)*str))
183 dt = strtol(str, &p, 0);
184 } else if (*str == '+' || *str == '-') {
185 val = strtol(str, &p, 0);
188 case 'H': /* hours */
193 case 'M': /* minutes */
197 case 'S': /* seconds */
202 dt += (val * 86400L);
205 case 'W': /* weeks */
206 dt += (val * 604800L);
209 case 'O': /* months */
211 T->tm_mon += (int) val;
215 case 'Y': /* years */
217 T->tm_year += (int) val;
222 if (T->tm_mday != i) {
225 dt -= (time_t) 86400L;
227 default: /* unknown */
228 break; /* leave untouched */
234 * Skip past any weekday prefix
237 strlcpy(tmp, str, sizeof(tmp));
242 * See if we can break off any timezone
244 while ((q = strrchr(tmp, ' ')) != NULL) {
245 if (strchr("(+-", q[1]) != NULL)
250 while (q[j] && isupper((unsigned char)q[j]))
260 * See if there is a time hh:mm[:ss]
262 if ((p = strchr(tmp, ':')) == NULL) {
265 * No time string involved
267 T->tm_hour = T->tm_min = T->tm_sec = 0;
268 parse_datesub(tmp, &T->tm_mday, &T->tm_mon, &T->tm_year);
270 char datestr[64], timestr[64];
273 * Let's chip off the time string
275 if ((q = strpbrk(p, " \t")) != NULL) { /* Time first? */
278 strlcpy(timestr, str, l + 1);
279 strlcpy(datestr, q + 1, sizeof(datestr));
280 parse_time(timestr, &T->tm_hour, &T->tm_min, &T->tm_sec);
281 parse_datesub(datestr, &T->tm_mday, &T->tm_mon, &T->tm_year);
282 } else if ((q = strrchr(tmp, ' ')) != NULL) { /* Time last */
285 strlcpy(timestr, q + 1, sizeof(timestr));
286 strlcpy(datestr, tmp, l + 1);
287 } else /* Bail out */
289 parse_time(timestr, &T->tm_hour, &T->tm_min, &T->tm_sec);
290 parse_datesub(datestr, &T->tm_mday, &T->tm_mon, &T->tm_year);