+++ /dev/null
-/* $NetBSD: strptime.c,v 1.28 2008/04/28 20:23:01 martin Exp $ */
-
-/*-
- * Copyright (c) 1997, 1998, 2005, 2008 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code was contributed to The NetBSD Foundation by Klaus Klein.
- * Heavily optimised by David Laight
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: strptime.c,v 1.28 2008/04/28 20:23:01 martin Exp $");
-#endif
-
-#include "namespace.h"
-#include <sys/localedef.h>
-#include <ctype.h>
-#include <locale.h>
-#include <string.h>
-#include <time.h>
-#include <tzfile.h>
-
-#ifdef __weak_alias
-__weak_alias(strptime,_strptime)
-#endif
-
-#define _ctloc(x) (_CurrentTimeLocale->x)
-
-/*
- * We do not implement alternate representations. However, we always
- * check whether a given modifier is allowed for a certain conversion.
- */
-#define ALT_E 0x01
-#define ALT_O 0x02
-#define LEGAL_ALT(x) { if (alt_format & ~(x)) return NULL; }
-
-static const char gmt[4] = { "GMT" };
-
-static const u_char *conv_num(const unsigned char *, int *, uint, uint);
-static const u_char *find_string(const u_char *, int *, const char * const *,
- const char * const *, int);
-
-
-char *
-strptime(const char *buf, const char *fmt, struct tm *tm)
-{
- unsigned char c;
- const unsigned char *bp;
- int alt_format, i, split_year = 0;
- const char *new_fmt;
-
- bp = (const u_char *)buf;
-
- while (bp != NULL && (c = *fmt++) != '\0') {
- /* Clear `alternate' modifier prior to new conversion. */
- alt_format = 0;
- i = 0;
-
- /* Eat up white-space. */
- if (isspace(c)) {
- while (isspace(*bp))
- bp++;
- continue;
- }
-
- if (c != '%')
- goto literal;
-
-
-again: switch (c = *fmt++) {
- case '%': /* "%%" is converted to "%". */
-literal:
- if (c != *bp++)
- return NULL;
- LEGAL_ALT(0);
- continue;
-
- /*
- * "Alternative" modifiers. Just set the appropriate flag
- * and start over again.
- */
- case 'E': /* "%E?" alternative conversion modifier. */
- LEGAL_ALT(0);
- alt_format |= ALT_E;
- goto again;
-
- case 'O': /* "%O?" alternative conversion modifier. */
- LEGAL_ALT(0);
- alt_format |= ALT_O;
- goto again;
-
- /*
- * "Complex" conversion rules, implemented through recursion.
- */
- case 'c': /* Date and time, using the locale's format. */
- new_fmt = _ctloc(d_t_fmt);
- goto recurse;
-
- case 'D': /* The date as "%m/%d/%y". */
- new_fmt = "%m/%d/%y";
- LEGAL_ALT(0);
- goto recurse;
-
- case 'F': /* The date as "%Y-%m-%d". */
- new_fmt = "%Y-%m-%d";
- LEGAL_ALT(0);
- goto recurse;
-
- case 'R': /* The time as "%H:%M". */
- new_fmt = "%H:%M";
- LEGAL_ALT(0);
- goto recurse;
-
- case 'r': /* The time in 12-hour clock representation. */
- new_fmt =_ctloc(t_fmt_ampm);
- LEGAL_ALT(0);
- goto recurse;
-
- case 'T': /* The time as "%H:%M:%S". */
- new_fmt = "%H:%M:%S";
- LEGAL_ALT(0);
- goto recurse;
-
- case 'X': /* The time, using the locale's format. */
- new_fmt =_ctloc(t_fmt);
- goto recurse;
-
- case 'x': /* The date, using the locale's format. */
- new_fmt =_ctloc(d_fmt);
- recurse:
- bp = (const u_char *)strptime((const char *)bp,
- new_fmt, tm);
- LEGAL_ALT(ALT_E);
- continue;
-
- /*
- * "Elementary" conversion rules.
- */
- case 'A': /* The day of week, using the locale's form. */
- case 'a':
- bp = find_string(bp, &tm->tm_wday, _ctloc(day),
- _ctloc(abday), 7);
- LEGAL_ALT(0);
- continue;
-
- case 'B': /* The month, using the locale's form. */
- case 'b':
- case 'h':
- bp = find_string(bp, &tm->tm_mon, _ctloc(mon),
- _ctloc(abmon), 12);
- LEGAL_ALT(0);
- continue;
-
- case 'C': /* The century number. */
- i = 20;
- bp = conv_num(bp, &i, 0, 99);
-
- i = i * 100 - TM_YEAR_BASE;
- if (split_year)
- i += tm->tm_year % 100;
- split_year = 1;
- tm->tm_year = i;
- LEGAL_ALT(ALT_E);
- continue;
-
- case 'd': /* The day of month. */
- case 'e':
- bp = conv_num(bp, &tm->tm_mday, 1, 31);
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'k': /* The hour (24-hour clock representation). */
- LEGAL_ALT(0);
- /* FALLTHROUGH */
- case 'H':
- bp = conv_num(bp, &tm->tm_hour, 0, 23);
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'l': /* The hour (12-hour clock representation). */
- LEGAL_ALT(0);
- /* FALLTHROUGH */
- case 'I':
- bp = conv_num(bp, &tm->tm_hour, 1, 12);
- if (tm->tm_hour == 12)
- tm->tm_hour = 0;
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'j': /* The day of year. */
- i = 1;
- bp = conv_num(bp, &i, 1, 366);
- tm->tm_yday = i - 1;
- LEGAL_ALT(0);
- continue;
-
- case 'M': /* The minute. */
- bp = conv_num(bp, &tm->tm_min, 0, 59);
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'm': /* The month. */
- i = 1;
- bp = conv_num(bp, &i, 1, 12);
- tm->tm_mon = i - 1;
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'p': /* The locale's equivalent of AM/PM. */
- bp = find_string(bp, &i, _ctloc(am_pm), NULL, 2);
- if (tm->tm_hour > 11)
- return NULL;
- tm->tm_hour += i * 12;
- LEGAL_ALT(0);
- continue;
-
- case 'S': /* The seconds. */
- bp = conv_num(bp, &tm->tm_sec, 0, 61);
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'U': /* The week of year, beginning on sunday. */
- case 'W': /* The week of year, beginning on monday. */
- /*
- * XXX This is bogus, as we can not assume any valid
- * information present in the tm structure at this
- * point to calculate a real value, so just check the
- * range for now.
- */
- bp = conv_num(bp, &i, 0, 53);
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'w': /* The day of week, beginning on sunday. */
- bp = conv_num(bp, &tm->tm_wday, 0, 6);
- LEGAL_ALT(ALT_O);
- continue;
-
- case 'Y': /* The year. */
- i = TM_YEAR_BASE; /* just for data sanity... */
- bp = conv_num(bp, &i, 0, 9999);
- tm->tm_year = i - TM_YEAR_BASE;
- LEGAL_ALT(ALT_E);
- continue;
-
- case 'y': /* The year within 100 years of the epoch. */
- /* LEGAL_ALT(ALT_E | ALT_O); */
- bp = conv_num(bp, &i, 0, 99);
-
- if (split_year)
- /* preserve century */
- i += (tm->tm_year / 100) * 100;
- else {
- split_year = 1;
- if (i <= 68)
- i = i + 2000 - TM_YEAR_BASE;
- else
- i = i + 1900 - TM_YEAR_BASE;
- }
- tm->tm_year = i;
- continue;
-
- case 'Z':
- tzset();
- if (strncmp((const char *)bp, gmt, 3) == 0) {
- tm->tm_isdst = 0;
-#ifdef TM_GMTOFF
- tm->TM_GMTOFF = 0;
-#endif
-#ifdef TM_ZONE
- tm->TM_ZONE = gmt;
-#endif
- bp += 3;
- } else {
- const unsigned char *ep;
-
- ep = find_string(bp, &i,
- (const char * const *)tzname,
- NULL, 2);
- if (ep != NULL) {
- tm->tm_isdst = i;
-#ifdef TM_GMTOFF
- tm->TM_GMTOFF = -(timezone);
-#endif
-#ifdef TM_ZONE
- tm->TM_ZONE = tzname[i];
-#endif
- }
- bp = ep;
- }
- continue;
-
- /*
- * Miscellaneous conversions.
- */
- case 'n': /* Any kind of white-space. */
- case 't':
- while (isspace(*bp))
- bp++;
- LEGAL_ALT(0);
- continue;
-
-
- default: /* Unknown/unsupported conversion. */
- return NULL;
- }
- }
-
- return __UNCONST(bp);
-}
-
-
-static const u_char *
-conv_num(const unsigned char *buf, int *dest, uint llim, uint ulim)
-{
- uint result = 0;
- unsigned char ch;
-
- /* The limit also determines the number of valid digits. */
- uint rulim = ulim;
-
- ch = *buf;
- if (ch < '0' || ch > '9')
- return NULL;
-
- do {
- result *= 10;
- result += ch - '0';
- rulim /= 10;
- ch = *++buf;
- } while ((result * 10 <= ulim) && rulim && ch >= '0' && ch <= '9');
-
- if (result < llim || result > ulim)
- return NULL;
-
- *dest = result;
- return buf;
-}
-
-static const u_char *
-find_string(const u_char *bp, int *tgt, const char * const *n1,
- const char * const *n2, int c)
-{
- int i;
- unsigned int len;
-
- /* check full name - then abbreviated ones */
- for (; n1 != NULL; n1 = n2, n2 = NULL) {
- for (i = 0; i < c; i++, n1++) {
- len = strlen(*n1);
- if (strncasecmp(*n1, (const char *)bp, len) == 0) {
- *tgt = i;
- return bp + len;
- }
- }
- }
-
- /* Nothing matched */
- return NULL;
-}
