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Diffstat (limited to 'libmisc/strtoday.c')
| -rw-r--r-- | libmisc/strtoday.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/libmisc/strtoday.c b/libmisc/strtoday.c deleted file mode 100644 index d321873..0000000 --- a/libmisc/strtoday.c +++ /dev/null @@ -1,220 +0,0 @@ -/* - * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh - * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz - * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko - * SPDX-FileCopyrightText: 2008 , Nicolas François - * - * SPDX-License-Identifier: BSD-3-Clause - */ - -#if !defined(__GLIBC__) -#define _XOPEN_SOURCE 500 -#endif - -#include <config.h> - -#include <ctype.h> - -#ident "$Id$" - -#include "defines.h" -#include "prototypes.h" - -#ifndef USE_GETDATE -#define USE_GETDATE 1 -#endif - -#if USE_GETDATE -#include "getdate.h" -/* - * strtoday() now uses get_date() (borrowed from GNU shellutils) - * which can handle many date formats, for example: - * 1970-09-17 # ISO 8601. - * 70-9-17 # This century assumed by default. - * 70-09-17 # Leading zeros are ignored. - * 9/17/72 # Common U.S. writing. - * 24 September 1972 - * 24 Sept 72 # September has a special abbreviation. - * 24 Sep 72 # Three-letter abbreviations always allowed. - * Sep 24, 1972 - * 24-sep-72 - * 24sep72 - */ -long strtoday (const char *str) -{ - time_t t; - bool isnum = true; - const char *s = str; - - /* - * get_date() interprets an empty string as the current date, - * which is not what we expect, unless you're a BOFH :-). - * (useradd sets sp_expire = current date for new lusers) - */ - if ((NULL == str) || ('\0' == *str)) { - return -1; - } - - /* If a numerical value is provided, this is already a number of - * days since EPOCH. - */ - if ('-' == *s) { - s++; - } - while (' ' == *s) { - s++; - } - while (isnum && ('\0' != *s)) { - if (!isdigit (*s)) { - isnum = false; - } - s++; - } - if (isnum) { - long retdate; - if (getlong (str, &retdate) == 0) { - return -2; - } - return retdate; - } - - t = get_date (str, NULL); - if ((time_t) - 1 == t) { - return -2; - } - /* convert seconds to days since 1970-01-01 */ - return (long) (t + DAY / 2) / DAY; -} - -#else /* !USE_GETDATE */ -/* - * Old code, just in case get_date() doesn't work as expected... - */ -#include <stdio.h> -#ifdef HAVE_STRPTIME -/* - * for now we allow just one format, but we can define more later - * (we try them all until one succeeds). --marekm - */ -static const char *const date_formats[] = { - "%Y-%m-%d", - (char *) 0 -}; -#else -/* - * days and juldays are used to compute the number of days in the - * current month, and the cumulative number of days in the preceding - * months. they are declared so that january is 1, not 0. - */ -static const short days[13] = { 0, - 31, 28, 31, 30, 31, 30, /* JAN - JUN */ - 31, 31, 30, 31, 30, 31 -}; /* JUL - DEC */ - -static const short juldays[13] = { 0, - 0, 31, 59, 90, 120, 151, /* JAN - JUN */ - 181, 212, 243, 273, 304, 334 -}; /* JUL - DEC */ -#endif - -/* - * strtoday - compute the number of days since 1970. - * - * the total number of days prior to the current date is - * computed. january 1, 1970 is used as the origin with - * it having a day number of 0. - */ - -long strtoday (const char *str) -{ -#ifdef HAVE_STRPTIME - struct tm tp; - const char *const *fmt; - char *cp; - time_t result; - - memzero (&tp, sizeof tp); - for (fmt = date_formats; *fmt; fmt++) { - cp = strptime ((char *) str, *fmt, &tp); - if ((NULL == cp) || ('\0' != *cp)) { - continue; - } - - result = mktime (&tp); - if ((time_t) - 1 == result) { - continue; - } - - return (long) (result / DAY); /* success */ - } - return -1; -#else - char slop[2]; - int month; - int day; - int year; - long total; - - /* - * start by separating the month, day and year. the order - * is compiled in ... - */ - - if (sscanf (str, "%d/%d/%d%c", &year, &month, &day, slop) != 3) { - return -1; - } - - /* - * the month, day of the month, and year are checked for - * correctness and the year adjusted so it falls between - * 1970 and 2069. - */ - - if ((month < 1) || (month > 12)) { - return -1; - } - - if (day < 1) { - return -1; - } - - if ( ((2 != month) || ((year % 4) != 0)) - && (day > days[month])) { - return -1; - } else if ((month == 2) && ((year % 4) == 0) && (day > 29)) { - return -1; - } - - if (year < 0) { - return -1; - } else if (year <= 69) { - year += 2000; - } else if (year <= 99) { - year += 1900; - } - - /* - * On systems with 32-bit signed time_t, time wraps around in 2038 - * - for now we just limit the year to 2037 (instead of 2069). - * This limit can be removed once no one is using 32-bit systems - * anymore :-). --marekm - */ - if ((year < 1970) || (year > 2037)) { - return -1; - } - - /* - * the total number of days is the total number of days in all - * the whole years, plus the number of leap days, plus the - * number of days in the whole months preceding, plus the number - * of days so far in the month. - */ - - total = (long) ((year - 1970) * 365L) + (((year + 1) - 1970) / 4); - total += (long) juldays[month] + (month > 2 && (year % 4) == 0 ? 1 : 0); - total += (long) day - 1; - - return total; -#endif /* HAVE_STRPTIME */ -} -#endif /* !USE_GETDATE */ |