diff options
Diffstat (limited to 'lib/parsetime.c')
-rw-r--r-- | lib/parsetime.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/lib/parsetime.c b/lib/parsetime.c new file mode 100644 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; +} + |