strptime.c@ 312

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Last change on this file since 312 was 312, checked in by Nishi, on Oct 14, 2024 at 3:17:37 AM
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Rev	Line
[32]	1	/* $NetBSD: strptime.c,v 1.62 2017/08/24 01:01:09 ginsbach Exp $ */
	2	/* http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/lib/libc/time/strptime.c?only_with_tag=HEAD
	3	* NetBSD implementation strptime().
	4	* Format description: https://netbsd.gw.com/cgi-bin/man-cgi?strptime+3+NetBSD-current
	5	*/
	6	/*-
	7	* Copyright (c) 1997, 1998, 2005, 2008 The NetBSD Foundation, Inc.
	8	* All rights reserved.
	9	*
	10	* This code was contributed to The NetBSD Foundation by Klaus Klein.
	11	* Heavily optimised by David Laight
	12	*
	13	* Redistribution and use in source and binary forms, with or without
	14	* modification, are permitted provided that the following conditions
	15	* are met:
	16	* 1. Redistributions of source code must retain the above copyright
	17	* notice, this list of conditions and the following disclaimer.
	18	* 2. Redistributions in binary form must reproduce the above copyright
	19	* notice, this list of conditions and the following disclaimer in the
	20	* documentation and/or other materials provided with the distribution.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
	23	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
	24	* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	25	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
	26	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	27	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	28	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	29	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	30	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	31	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	32	* POSSIBILITY OF SUCH DAMAGE.
	33	*/
	34
	35	//#include <sys/cdefs.h>
	36	//__RCSID("$NetBSD: strptime.c,v 1.62 2017/08/24 01:01:09 ginsbach Exp $");
	37
[219]	38	#if defined(__MINGW32__) \|\| defined(_MSC_VER) \|\| defined(__BORLANDC__) \|\| defined(__WATCOMC__)
[34]	39
[32]	40	#include <ctype.h>
	41	#include <string.h>
	42	#include <time.h>
	43	#include <stdint.h>
[243]	44
	45	#ifdef __WATCOMC__
[241]	46	#include <strings.h>
[243]	47	#endif
[32]	48
	49	static const unsigned char conv_num(const unsigned char , int *, unsigned int, unsigned int);
	50	static const unsigned char find_string(const unsigned char , int , const char const , const char const *, int);
	51
	52	/*
	53	* We do not implement alternate representations. However, we always
	54	* check whether a given modifier is allowed for a certain conversion.
	55	*/
	56	#define ALT_E 0x01
	57	#define ALT_O 0x02
	58	#define LEGAL_ALT(x) { if (alt_format & ~(x)) return NULL; }
	59
	60	#define TM_YEAR_BASE 1900
	61
	62	#define TM_SUNDAY 0
	63	#define TM_MONDAY 1
	64	#define TM_TUESDAY 2
	65	#define TM_WEDNESDAY 3
	66	#define TM_THURSDAY 4
	67	#define TM_FRIDAY 5
	68	#define TM_SATURDAY 6
	69
	70	#define S_YEAR (1 << 0)
	71	#define S_MON (1 << 1)
	72	#define S_YDAY (1 << 2)
	73	#define S_MDAY (1 << 3)
	74	#define S_WDAY (1 << 4)
	75	#define S_HOUR (1 << 5)
	76
	77	#define HAVE_MDAY(s) (s & S_MDAY)
	78	#define HAVE_MON(s) (s & S_MON)
	79	#define HAVE_WDAY(s) (s & S_WDAY)
	80	#define HAVE_YDAY(s) (s & S_YDAY)
	81	#define HAVE_YEAR(s) (s & S_YEAR)
	82	#define HAVE_HOUR(s) (s & S_HOUR)
	83
	84	#define SECSPERMIN 60
	85	#define MINSPERHOUR 60
	86	#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
	87	#define HOURSPERDAY 24
	88
	89	#define HERE_D_T_FMT "%a %b %e %H:%M:%S %Y"
	90	#define HERE_D_FMT "%y/%m/%d"
	91	#define HERE_T_FMT_AMPM "%I:%M:%S %p"
	92	#define HERE_T_FMT "%H:%M:%S"
	93
	94	#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 \|\| ((y) % 400) == 0))
	95
	96	/*
	97	** Since everything in isleap is modulo 400 (or a factor of 400), we know that
	98	** isleap(y) == isleap(y % 400)
	99	** and so
	100	** isleap(a + b) == isleap((a + b) % 400)
	101	** or
	102	** isleap(a + b) == isleap(a % 400 + b % 400)
	103	** This is true even if % means modulo rather than Fortran remainder
	104	** (which is allowed by C89 but not by C99 or later).
	105	** We use this to avoid addition overflow problems.
	106	*/
	107
	108	#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
	109
[215]	110	#if defined(_MSC_VER) \|\| defined(__BORLANDC__)
[32]	111	#define tzname _tzname
	112	#define strncasecmp _strnicmp
	113	#endif
	114
[241]	115	#ifdef __WATCOMC__
	116	#define _tzset tzset
	117	#endif
	118
[215]	119	#ifdef __BORLANDC__
	120	char* cm_strdup(const char* str);
	121
	122	int _strnicmp(const char* _a, const char* _b, int len){
	123	char* a = cm_strdup(_a);
	124	char* b = cm_strdup(_b);
	125	int i;
	126	char* r;
	127	for(i = 0; a[i] != 0; i++){
	128	a[i] = tolower(a[i]);
	129	}
	130	for(i = 0; b[i] != 0; i++){
	131	b[i] = tolower(b[i]);
	132	}
	133	r = strncmp(a, b, len);
	134	free(a);
	135	free(b);
	136	return r;
	137	}
	138	#endif
	139
[32]	140	#ifdef TM_ZONE
	141	static char* utc = "UTC";
	142	#endif
	143	/* RFC-822/RFC-2822 */
	144	static const char* const nast[] = {
	145	"EST", "CST", "MST", "PST", "\0\0\0"
	146	};
	147	static const char* const nadt[] = {
	148	"EDT", "CDT", "MDT", "PDT", "\0\0\0"
	149	};
	150	static const char* weekday_name[] =
	151	{
	152	"Sunday", "Monday", "Tuesday", "Wednesday",
	153	"Thursday", "Friday", "Saturday"
	154	};
	155	static const char* ab_weekday_name[] =
	156	{
	157	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
	158	};
	159	static const char* month_name[] =
	160	{
	161	"January", "February", "March", "April", "May", "June",
	162	"July", "August", "September", "October", "November", "December"
	163	};
	164	static const char* ab_month_name[] =
	165	{
	166	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
	167	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
	168	};
	169	static const char* am_pm[] = {"AM", "PM"};
	170
	171
	172	/*
	173	* Table to determine the ordinal date for the start of a month.
	174	* Ref: http://en.wikipedia.org/wiki/ISO_week_date
	175	*/
	176	static const int start_of_month[2][13] = {
	177	/* non-leap year */
	178	{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
	179	/* leap year */
	180	{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
	181	};
	182
	183	/*
	184	* Calculate the week day of the first day of a year. Valid for
	185	* the Gregorian calendar, which began Sept 14, 1752 in the UK
	186	* and its colonies. Ref:
	187	* http://en.wikipedia.org/wiki/Determination_of_the_day_of_the_week
	188	*/
	189
	190	static int
	191	first_wday_of(int yr)
	192	{
	193	return ((2 * (3 - (yr / 100) % 4)) + (yr % 100) + ((yr % 100) / 4) +
	194	(isleap(yr) ? 6 : 0) + 1) % 7;
	195	}
	196
	197	#define delim(p) ((p) == '\0' \|\| isspace((unsigned char)(p)))
	198
	199	static int
	200	fromzone(const unsigned char *bp, struct tm tm, int mandatory)
	201	{
	202	// timezone_t tz;
	203	char buf[512], *p;
	204	const unsigned char *rp;
	205
	206	for (p = buf, rp = bp; !delim(rp) && p < &buf[sizeof(buf) - 1]; rp++)
	207	p++ = rp;
	208	*p = '\0';
	209
	210	if (mandatory)
	211	*bp = rp;
	212	if (!isalnum((unsigned char)*buf))
	213	return 0;
	214	// tz = tzalloc(buf);
	215	// if (tz == NULL)
	216	// return 0;
	217
	218	*bp = rp;
	219	tm->tm_isdst = 0; /* XXX */
	220	#ifdef TM_GMTOFF
	221	tm->TM_GMTOFF = tzgetgmtoff(tz, tm->tm_isdst);
	222	#endif
	223	#ifdef TM_ZONE
	224	// Can't use tzgetname() here because we are going to free()
	225	tm->TM_ZONE = NULL; /* XXX */
	226	#endif
	227	// tzfree(tz);
	228	return 1;
	229	}
	230
	231	char* strptime(const char buf, const char fmt, struct tm *tm)
	232	{
	233	unsigned char c;
	234	const unsigned char bp, ep, *zname;
	235	int alt_format, i, split_year = 0, neg = 0, state = 0,
	236	day_offset = -1, week_offset = 0, offs, mandatory;
	237	const char *new_fmt;
	238
	239	bp = (const unsigned char *)buf;
	240
	241	while (bp != NULL && (c = *fmt++) != '\0') {
	242	/* Clear `alternate' modifier prior to new conversion. */
	243	alt_format = 0;
	244	i = 0;
	245
	246	/* Eat up white-space. */
	247	if (isspace(c)) {
	248	while (isspace(*bp))
	249	bp++;
	250	continue;
	251	}
	252
	253	if (c != '%')
	254	goto literal;
	255
	256
	257	again: switch (c = *fmt++) {
	258	case '%': /* "%%" is converted to "%". */
	259	literal:
	260	if (c != *bp++)
	261	return NULL;
	262	LEGAL_ALT(0);
	263	continue;
	264
	265	/*
	266	* "Alternative" modifiers. Just set the appropriate flag
	267	* and start over again.
	268	*/
	269	case 'E': /* "%E?" alternative conversion modifier. */
	270	LEGAL_ALT(0);
	271	alt_format \|= ALT_E;
	272	goto again;
	273
	274	case 'O': /* "%O?" alternative conversion modifier. */
	275	LEGAL_ALT(0);
	276	alt_format \|= ALT_O;
	277	goto again;
	278
	279	/*
	280	* "Complex" conversion rules, implemented through recursion.
	281	*/
	282	case 'c': /* Date and time, using the locale's format. */
	283	// new_fmt = _TIME_LOCALE(loc)->d_t_fmt;
	284	new_fmt = HERE_D_T_FMT;
	285	state \|= S_WDAY \| S_MON \| S_MDAY \| S_YEAR;
	286	goto recurse;
	287
	288	case 'F': /* The date as "%Y-%m-%d". */
	289	new_fmt = "%Y-%m-%d";
	290	LEGAL_ALT(0);
	291	state \|= S_MON \| S_MDAY \| S_YEAR;
	292	goto recurse;
	293
	294	case 'R': /* The time as "%H:%M". */
	295	new_fmt = "%H:%M";
	296	LEGAL_ALT(0);
	297	goto recurse;
	298
	299	case 'r': /* The time in 12-hour clock representation. */
	300	// new_fmt = _TIME_LOCALE(loc)->t_fmt_ampm;
	301	new_fmt = HERE_T_FMT_AMPM;
	302	LEGAL_ALT(0);
	303	goto recurse;
	304
	305	case 'X': /* The time, using the locale's format. */
	306	/* fall through */
	307
	308	case 'T': /* The time as "%H:%M:%S". */
	309	new_fmt = HERE_T_FMT;
	310	LEGAL_ALT(0);
	311
	312	recurse:
	313	bp = (const unsigned char )strptime((const char )bp,
	314	new_fmt, tm);
	315	LEGAL_ALT(ALT_E);
	316	continue;
	317
	318	case 'x': /* The date, using the locale's format. */
	319	/* fall throug */
	320
	321	case 'D': /* The date as "%y/%m/%d". */
	322	{
[212]	323	int year;
[32]	324	new_fmt = HERE_D_FMT;
	325	LEGAL_ALT(0);
	326	state \|= S_MON \| S_MDAY \| S_YEAR;
[212]	327	year = split_year ? tm->tm_year : 0;
[32]	328
	329	bp = (const unsigned char )strptime((const char )bp,
	330	new_fmt, tm);
	331	LEGAL_ALT(ALT_E);
	332	tm->tm_year += year;
	333	if (split_year && tm->tm_year % (2000 - TM_YEAR_BASE) <= 68)
	334	tm->tm_year -= 2000 - TM_YEAR_BASE;
	335	split_year = 1;
	336	continue;
	337	}
	338	/*
	339	* "Elementary" conversion rules.
	340	*/
	341	case 'A': /* The day of week, using the locale's form. */
	342	case 'a':
	343	bp = find_string(bp, &tm->tm_wday, weekday_name, ab_weekday_name, 7);
	344	LEGAL_ALT(0);
	345	state \|= S_WDAY;
	346	continue;
	347
	348	case 'B': /* The month, using the locale's form. */
	349	case 'b':
	350	case 'h':
	351	bp = find_string(bp, &tm->tm_mon, month_name, ab_month_name, 12);
	352	LEGAL_ALT(0);
	353	state \|= S_MON;
	354	continue;
	355
	356	case 'C': /* The century number. */
	357	i = 20;
	358	bp = conv_num(bp, &i, 0, 99);
	359
	360	i = i * 100 - TM_YEAR_BASE;
	361	if (split_year)
	362	i += tm->tm_year % 100;
	363	split_year = 1;
	364	tm->tm_year = i;
	365	LEGAL_ALT(ALT_E);
	366	state \|= S_YEAR;
	367	continue;
	368
	369	case 'd': /* The day of month. */
	370	case 'e':
	371	bp = conv_num(bp, &tm->tm_mday, 1, 31);
	372	LEGAL_ALT(ALT_O);
	373	state \|= S_MDAY;
	374	continue;
	375
	376	case 'k': /* The hour (24-hour clock representation). */
	377	LEGAL_ALT(0);
	378	/* FALLTHROUGH */
	379	case 'H':
	380	bp = conv_num(bp, &tm->tm_hour, 0, 23);
	381	LEGAL_ALT(ALT_O);
	382	state \|= S_HOUR;
	383	continue;
	384
	385	case 'l': /* The hour (12-hour clock representation). */
	386	LEGAL_ALT(0);
	387	/* FALLTHROUGH */
	388	case 'I':
	389	bp = conv_num(bp, &tm->tm_hour, 1, 12);
	390	if (tm->tm_hour == 12)
	391	tm->tm_hour = 0;
	392	LEGAL_ALT(ALT_O);
	393	state \|= S_HOUR;
	394	continue;
	395
	396	case 'j': /* The day of year. */
	397	i = 1;
	398	bp = conv_num(bp, &i, 1, 366);
	399	tm->tm_yday = i - 1;
	400	LEGAL_ALT(0);
	401	state \|= S_YDAY;
	402	continue;
	403
	404	case 'M': /* The minute. */
	405	bp = conv_num(bp, &tm->tm_min, 0, 59);
	406	LEGAL_ALT(ALT_O);
	407	continue;
	408
	409	case 'm': /* The month. */
	410	i = 1;
	411	bp = conv_num(bp, &i, 1, 12);
	412	tm->tm_mon = i - 1;
	413	LEGAL_ALT(ALT_O);
	414	state \|= S_MON;
	415	continue;
	416
	417	case 'p': /* The locale's equivalent of AM/PM. */
	418	bp = find_string(bp, &i, am_pm, NULL, 2);
	419	if (HAVE_HOUR(state) && tm->tm_hour > 11)
	420	return NULL;
	421	tm->tm_hour += i * 12;
	422	LEGAL_ALT(0);
	423	continue;
	424
	425	case 'S': /* The seconds. */
	426	bp = conv_num(bp, &tm->tm_sec, 0, 61);
	427	LEGAL_ALT(ALT_O);
	428	continue;
	429
	430	#ifndef TIME_MAX
[215]	431	#if defined(_MSC_VER) \|\| defined(__BORLANDC__)
[212]	432	#define TIME_MAX INT32_MAX
	433	#else
[32]	434	#define TIME_MAX INT64_MAX
	435	#endif
[212]	436	#endif
[32]	437	case 's': /* seconds since the epoch */
	438	{
	439	time_t sse = 0;
[215]	440	#if defined(_MSC_VER) \|\| defined(__BORLANDC__)
[212]	441	uint32_t rulim = TIME_MAX;
	442	#else
[32]	443	uint64_t rulim = TIME_MAX;
[212]	444	#endif
[32]	445
	446	if (bp < '0' \|\| bp > '9') {
	447	bp = NULL;
	448	continue;
	449	}
	450
	451	do {
	452	sse *= 10;
	453	sse += *bp++ - '0';
	454	rulim /= 10;
	455	} while ((sse * 10 <= TIME_MAX) &&
	456	rulim && bp >= '0' && bp <= '9');
[215]	457	#if defined(_MSC_VER) \|\| defined(__BORLANDC__)
[212]	458	if (sse < 0 \|\| (uint32_t)sse > TIME_MAX) {
	459	#else
[32]	460	if (sse < 0 \|\| (uint64_t)sse > TIME_MAX) {
[212]	461	#endif
[32]	462	bp = NULL;
	463	continue;
	464	}
[312]	465	#if defined(_WIN32) \|\| defined(__OS2__)
[241]	466	#if defined(_MSC_VER) \|\| defined(__BORLANDC__) \|\| defined(__WATCOMC__)
[212]	467	if (1)
[242]	468	#else
[32]	469	if (localtime_s(tm, &sse) == 0)
[212]	470	#endif
[32]	471	#else
	472	if (localtime_r(&sse, tm))
	473	#endif
	474	state \|= S_YDAY \| S_WDAY \| S_MON \| S_MDAY \| S_YEAR;
	475	else
	476	bp = NULL;
	477	}
	478	continue;
	479
	480	case 'U': /* The week of year, beginning on sunday. */
	481	case 'W': /* The week of year, beginning on monday. */
	482	/*
	483	* This is bogus, as we can not assume any valid
	484	* information present in the tm structure at this
	485	* point to calculate a real value, so save the
	486	* week for now in case it can be used later.
	487	*/
	488	bp = conv_num(bp, &i, 0, 53);
	489	LEGAL_ALT(ALT_O);
	490	if (c == 'U')
	491	day_offset = TM_SUNDAY;
	492	else
	493	day_offset = TM_MONDAY;
	494	week_offset = i;
	495	continue;
	496
	497	case 'w': /* The day of week, beginning on sunday. */
	498	bp = conv_num(bp, &tm->tm_wday, 0, 6);
	499	LEGAL_ALT(ALT_O);
	500	state \|= S_WDAY;
	501	continue;
	502
	503	case 'u': /* The day of week, monday = 1. */
	504	bp = conv_num(bp, &i, 1, 7);
	505	tm->tm_wday = i % 7;
	506	LEGAL_ALT(ALT_O);
	507	state \|= S_WDAY;
	508	continue;
	509
	510	case 'g': /* The year corresponding to the ISO week
	511	* number but without the century.
	512	*/
	513	bp = conv_num(bp, &i, 0, 99);
	514	continue;
	515
	516	case 'G': /* The year corresponding to the ISO week
	517	* number with century.
	518	*/
	519	do
	520	bp++;
	521	while (isdigit(*bp));
	522	continue;
	523
	524	case 'V': /* The ISO 8601:1988 week number as decimal */
	525	bp = conv_num(bp, &i, 0, 53);
	526	continue;
	527
	528	case 'Y': /* The year. */
	529	i = TM_YEAR_BASE; /* just for data sanity... */
	530	bp = conv_num(bp, &i, 0, 9999);
	531	tm->tm_year = i - TM_YEAR_BASE;
	532	LEGAL_ALT(ALT_E);
	533	state \|= S_YEAR;
	534	continue;
	535
	536	case 'y': /* The year within 100 years of the epoch. */
	537	/* LEGAL_ALT(ALT_E \| ALT_O); */
	538	bp = conv_num(bp, &i, 0, 99);
	539
	540	if (split_year)
	541	/* preserve century */
	542	i += (tm->tm_year / 100) * 100;
	543	else {
	544	split_year = 1;
	545	if (i <= 68)
	546	i = i + 2000 - TM_YEAR_BASE;
	547	}
	548	tm->tm_year = i;
	549	state \|= S_YEAR;
	550	continue;
	551
	552	case 'Z': // time zone name
	553	case 'z': //
	554	#ifdef _WIN32
	555	_tzset();
	556	#else
	557	tzset();
	558	#endif
	559	mandatory = c == 'z';
	560	/*
	561	* We recognize all ISO 8601 formats:
	562	* Z = Zulu time/UTC
	563	* [+-]hhmm
	564	* [+-]hh:mm
	565	* [+-]hh
	566	* We recognize all RFC-822/RFC-2822 formats:
	567	* UT\|GMT
	568	* North American : UTC offsets
	569	* E[DS]T = Eastern : -4 \| -5
	570	* C[DS]T = Central : -5 \| -6
	571	* M[DS]T = Mountain: -6 \| -7
	572	* P[DS]T = Pacific : -7 \| -8
	573	* Nautical/Military
	574	* [A-IL-M] = -1 ... -9 (J not used)
	575	* [N-Y] = +1 ... +12
	576	* Note: J maybe used to denote non-nautical
	577	* local time
	578	*/
	579	if (mandatory)
	580	while (isspace(*bp))
	581	bp++;
	582
	583	zname = bp;
	584	switch (*bp++) {
	585	case 'G':
	586	if (*bp++ != 'M')
	587	goto namedzone;
	588	/FALLTHROUGH/
	589	case 'U':
	590	if (*bp++ != 'T')
	591	goto namedzone;
	592	else if (!delim(bp) && bp++ != 'C')
	593	goto namedzone;
	594	/FALLTHROUGH/
	595	case 'Z':
	596	if (!delim(*bp))
	597	goto namedzone;
	598	tm->tm_isdst = 0;
	599	#ifdef TM_GMTOFF
	600	tm->TM_GMTOFF = 0;
	601	#endif
	602	#ifdef TM_ZONE
	603	tm->TM_ZONE = utc;
	604	#endif
	605	continue;
	606	case '+':
	607	neg = 0;
	608	break;
	609	case '-':
	610	neg = 1;
	611	break;
	612	default:
	613	namedzone:
	614	bp = zname;
	615
	616	/* Nautical / Military style */
	617	if (delim(bp[1]) &&
	618	((bp >= 'A' && bp <= 'I') \|\|
	619	(bp >= 'L' && bp <= 'Y'))) {
	620	#ifdef TM_GMTOFF
	621	/* Argh! No 'J'! */
	622	if (bp >= 'A' && bp <= 'I')
	623	tm->TM_GMTOFF =
	624	(int)*bp - ('A' - 1);
	625	else if (bp >= 'L' && bp <= 'M')
	626	tm->TM_GMTOFF = (int)*bp - 'A';
	627	else if (bp >= 'N' && bp <= 'Y')
	628	tm->TM_GMTOFF = 'M' - (int)*bp;
	629	tm->TM_GMTOFF *= SECSPERHOUR;
	630	#endif
	631	#ifdef TM_ZONE
	632	tm->TM_ZONE = NULL; /* XXX */
	633	#endif
	634	bp++;
	635	continue;
	636	}
	637	/* 'J' is local time */
	638	if (delim(bp[1]) && *bp == 'J') {
	639	#ifdef TM_GMTOFF
	640	tm->TM_GMTOFF = -timezone;
	641	#endif
	642	#ifdef TM_ZONE
	643	tm->TM_ZONE = NULL; /* XXX */
	644	#endif
	645	bp++;
	646	continue;
	647	}
	648
	649	/*
	650	* From our 3 letter hard-coded table
	651	* XXX: Can be removed, handled by tzload()
	652	*/
	653	if (delim(bp[0]) \|\| delim(bp[1]) \|\|
	654	delim(bp[2]) \|\| !delim(bp[3]))
	655	goto loadzone;
	656	ep = find_string(bp, &i, nast, NULL, 4);
	657	if (ep != NULL) {
	658	#ifdef TM_GMTOFF
	659	tm->TM_GMTOFF = (-5 - i) * SECSPERHOUR;
	660	#endif
	661	#ifdef TM_ZONE
	662	tm->TM_ZONE = __UNCONST(nast[i]);
	663	#endif
	664	bp = ep;
	665	continue;
	666	}
	667	ep = find_string(bp, &i, nadt, NULL, 4);
	668	if (ep != NULL) {
	669	tm->tm_isdst = 1;
	670	#ifdef TM_GMTOFF
	671	tm->TM_GMTOFF = (-4 - i) * SECSPERHOUR;
	672	#endif
	673	#ifdef TM_ZONE
	674	tm->TM_ZONE = __UNCONST(nadt[i]);
	675	#endif
	676	bp = ep;
	677	continue;
	678	}
	679	/*
	680	* Our current timezone
	681	*/
	682	ep = find_string(bp, &i,
[44]	683	(const char * const *)NULL,
[32]	684	NULL, 2);
	685	if (ep != NULL) {
	686	tm->tm_isdst = i;
	687	#ifdef TM_GMTOFF
	688	tm->TM_GMTOFF = -timezone;
	689	#endif
	690	#ifdef TM_ZONE
	691	tm->TM_ZONE = tzname[i];
	692	#endif
	693	bp = ep;
	694	continue;
	695	}
	696	loadzone:
	697	/*
	698	* The hard way, load the zone!
	699	*/
	700	if (fromzone(&bp, tm, mandatory))
	701	continue;
	702	goto out;
	703	}
	704	offs = 0;
	705	for (i = 0; i < 4; ) {
	706	if (isdigit(*bp)) {
	707	offs = offs * 10 + (*bp++ - '0');
	708	i++;
	709	continue;
	710	}
	711	if (i == 2 && *bp == ':') {
	712	bp++;
	713	continue;
	714	}
	715	break;
	716	}
	717	if (isdigit(*bp))
	718	goto out;
	719	switch (i) {
	720	case 2:
	721	offs *= SECSPERHOUR;
	722	break;
	723	case 4:
	724	i = offs % 100;
	725	offs /= 100;
	726	if (i >= SECSPERMIN)
	727	goto out;
	728	/* Convert minutes into decimal */
	729	offs = offs * SECSPERHOUR + i * SECSPERMIN;
	730	break;
	731	default:
	732	out:
	733	if (mandatory)
	734	return NULL;
	735	bp = zname;
	736	continue;
	737	}
	738	/* ISO 8601 & RFC 3339 limit to 23:59 max */
	739	if (offs >= (HOURSPERDAY * SECSPERHOUR))
	740	goto out;
	741	if (neg)
	742	offs = -offs;
	743	tm->tm_isdst = 0; /* XXX */
	744	#ifdef TM_GMTOFF
	745	tm->TM_GMTOFF = offs;
	746	#endif
	747	#ifdef TM_ZONE
	748	tm->TM_ZONE = NULL; /* XXX */
	749	#endif
	750	continue;
	751
	752	/*
	753	* Miscellaneous conversions.
	754	*/
	755	case 'n': /* Any kind of white-space. */
	756	case 't':
	757	while (isspace(*bp))
	758	bp++;
	759	LEGAL_ALT(0);
	760	continue;
	761
	762
	763	default: /* Unknown/unsupported conversion. */
	764	return NULL;
	765	}
	766	}
	767
	768	if (!HAVE_YDAY(state) && HAVE_YEAR(state)) {
	769	if (HAVE_MON(state) && HAVE_MDAY(state)) {
	770	/* calculate day of year (ordinal date) */
	771	tm->tm_yday = start_of_month[isleap_sum(tm->tm_year,
	772	TM_YEAR_BASE)][tm->tm_mon] + (tm->tm_mday - 1);
	773	state \|= S_YDAY;
	774	} else if (day_offset != -1) {
	775	/*
	776	* Set the date to the first Sunday (or Monday)
	777	* of the specified week of the year.
	778	*/
	779	if (!HAVE_WDAY(state)) {
	780	tm->tm_wday = day_offset;
	781	state \|= S_WDAY;
	782	}
	783	tm->tm_yday = (7 -
	784	first_wday_of(tm->tm_year + TM_YEAR_BASE) +
	785	day_offset) % 7 + (week_offset - 1) * 7 +
	786	tm->tm_wday - day_offset;
	787	state \|= S_YDAY;
	788	}
	789	}
	790
	791	if (HAVE_YDAY(state) && HAVE_YEAR(state)) {
	792	int isleap;
	793
	794	if (!HAVE_MON(state)) {
	795	/* calculate month of day of year */
	796	i = 0;
	797	isleap = isleap_sum(tm->tm_year, TM_YEAR_BASE);
	798	while (tm->tm_yday >= start_of_month[isleap][i])
	799	i++;
	800	if (i > 12) {
	801	i = 1;
	802	tm->tm_yday -= start_of_month[isleap][12];
	803	tm->tm_year++;
	804	}
	805	tm->tm_mon = i - 1;
	806	state \|= S_MON;
	807	}
	808
	809	if (!HAVE_MDAY(state)) {
	810	/* calculate day of month */
	811	isleap = isleap_sum(tm->tm_year, TM_YEAR_BASE);
	812	tm->tm_mday = tm->tm_yday -
	813	start_of_month[isleap][tm->tm_mon] + 1;
	814	state \|= S_MDAY;
	815	}
	816
	817	if (!HAVE_WDAY(state)) {
	818	/* calculate day of week */
	819	i = 0;
	820	week_offset = first_wday_of(tm->tm_year);
	821	while (i++ <= tm->tm_yday) {
	822	if (week_offset++ >= 6)
	823	week_offset = 0;
	824	}
	825	tm->tm_wday = week_offset;
	826	state \|= S_WDAY;
	827	}
	828	}
	829
	830	return (char*)bp;
	831	}
	832
	833
	834	static const unsigned char *
	835	conv_num(const unsigned char buf, int dest, unsigned int llim, unsigned int ulim)
	836	{
	837	unsigned int result = 0;
	838	unsigned char ch;
	839
	840	/* The limit also determines the number of valid digits. */
	841	unsigned int rulim = ulim;
	842
	843	ch = *buf;
	844	if (ch < '0' \|\| ch > '9')
	845	return NULL;
	846
	847	do {
	848	result *= 10;
	849	result += ch - '0';
	850	rulim /= 10;
	851	ch = *++buf;
	852	} while ((result <= ulim) && rulim && ch >= '0' && ch <= '9');
	853
	854	if (result < llim \|\| result > ulim)
	855	return NULL;
	856
	857	*dest = result;
	858	return buf;
	859	}
	860
	861	static const unsigned char *
	862	find_string(const unsigned char bp, int tgt, const char * const *n1,
	863	const char * const *n2, int c)
	864	{
	865	int i;
	866	size_t len;
	867
	868	/* check full name - then abbreviated ones */
	869	for (; n1 != NULL; n1 = n2, n2 = NULL) {
	870	for (i = 0; i < c; i++, n1++) {
	871	len = strlen(*n1);
	872	if (strncasecmp(n1, (const char )bp, len) == 0) {
	873	*tgt = i;
	874	return bp + len;
	875	}
	876	}
	877	}
	878
	879	/* Nothing matched */
	880	return NULL;
	881	}
[34]	882
	883	#endif

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source: Main/trunk/Server/strptime.c@ 312

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