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-rw-r--r--lib/parsetime.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/parsetime.c b/lib/parsetime.c
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index 0000000..99d8079
--- /dev/null
+++ b/lib/parsetime.c
@@ -0,0 +1,109 @@
+/* This file is part of Pies.
+ Copyright (C) 2007, 2008, 2009 Sergey Poznyakoff
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <c-ctype.h>
+
+static int
+time_multiplier(const char *str, unsigned *m, unsigned *plen)
+{
+ static struct timetab {
+ char *name;
+ unsigned mul;
+ } tab[] = {
+ { "seconds", 1 },
+ { "minutes", 60 },
+ { "hours", 60*60 },
+ { "days", 24*60*60 },
+ { "weeks", 7*24*60*60 },
+ { "months", 31*7*24*60*60 },
+ { NULL }
+ };
+ struct timetab *p;
+ int slen;
+
+ for (slen = 0; str[slen]; slen++)
+ if (c_isspace(str[slen]))
+ break;
+
+ for (p = tab; p->name; p++) {
+ if (p->name[0] == c_tolower(str[0])) {
+ int nlen = strlen(p->name);
+
+ if (nlen > slen)
+ nlen = slen;
+
+ if (strncasecmp(p->name, str, nlen) == 0) {
+ *m = p->mul;
+ if (plen)
+ *plen = nlen;
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+
+int
+parse_time_interval(const char *str, time_t *pint, const char **endp)
+{
+ int rc = 0;
+ time_t interval = 0;
+
+ while (*str) {
+ char *p;
+ unsigned long n;
+ unsigned mul, len;
+
+ while (*str && c_isspace(*str))
+ str++;
+
+ if (!c_isdigit(*str) && time_multiplier(str, &mul, &len) == 0) {
+ n = 1;
+ str += len;
+ } else {
+ n = strtoul(str, &p, 10);
+ if (*p && !c_isspace(*p)) {
+ str = p;
+ rc = 1;
+ break;
+ }
+
+ while (*p && c_isspace(*p))
+ p++;
+
+ str = p;
+ if (*str) {
+ if (rc = time_multiplier(str, &mul, &len))
+ break;
+ str += len;
+ } else
+ mul = 1;
+ }
+ interval += n*mul;
+ }
+
+ if (rc && endp)
+ *endp = str;
+ *pint = interval;
+ return rc;
+}
+

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