diff options
Diffstat (limited to 'contrib/tzcode/stdtime/strftime.c')
| -rw-r--r-- | contrib/tzcode/stdtime/strftime.c | 634 |
1 files changed, 0 insertions, 634 deletions
diff --git a/contrib/tzcode/stdtime/strftime.c b/contrib/tzcode/stdtime/strftime.c deleted file mode 100644 index dac910b..0000000 --- a/contrib/tzcode/stdtime/strftime.c +++ /dev/null @@ -1,634 +0,0 @@ -/* - * Copyright (c) 1989 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#ifndef lint -#ifndef NOID -static const char elsieid[] = "@(#)strftime.3 8.3"; -/* -** Based on the UCB version with the ID appearing below. -** This is ANSIish only when "multibyte character == plain character". -*/ -#endif /* !defined NOID */ -#endif /* !defined lint */ - -#include "namespace.h" -#include "private.h" - -#if defined(LIBC_SCCS) && !defined(lint) -static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89"; -#endif /* LIBC_SCCS and not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "tzfile.h" -#include <fcntl.h> -#include <sys/stat.h> -#include "un-namespace.h" -#include "timelocal.h" - -static char * _add(const char *, char *, const char *); -static char * _conv(int, const char *, char *, const char *); -static char * _fmt(const char *, const struct tm *, char *, const char *, - int *); -static char * _yconv(int, int, int, int, char *, const char *); - -extern char * tzname[]; - -#ifndef YEAR_2000_NAME -#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS" -#endif /* !defined YEAR_2000_NAME */ - -#define IN_NONE 0 -#define IN_SOME 1 -#define IN_THIS 2 -#define IN_ALL 3 - -#define PAD_DEFAULT 0 -#define PAD_LESS 1 -#define PAD_SPACE 2 -#define PAD_ZERO 3 - -static const char* fmt_padding[][4] = { - /* DEFAULT, LESS, SPACE, ZERO */ -#define PAD_FMT_MONTHDAY 0 -#define PAD_FMT_HMS 0 -#define PAD_FMT_CENTURY 0 -#define PAD_FMT_SHORTYEAR 0 -#define PAD_FMT_MONTH 0 -#define PAD_FMT_WEEKOFYEAR 0 -#define PAD_FMT_DAYOFMONTH 0 - { "%02d", "%d", "%2d", "%02d" }, -#define PAD_FMT_SDAYOFMONTH 1 -#define PAD_FMT_SHMS 1 - { "%2d", "%d", "%2d", "%02d" }, -#define PAD_FMT_DAYOFYEAR 2 - { "%03d", "%d", "%3d", "%03d" }, -#define PAD_FMT_YEAR 3 - { "%04d", "%d", "%4d", "%04d" } -}; - -size_t -strftime(char * __restrict s, size_t maxsize, const char * __restrict format, - const struct tm * __restrict t) -{ - char * p; - int warn; - - tzset(); - warn = IN_NONE; - p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn); -#ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU - if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) { - (void) fprintf(stderr, "\n"); - if (format == NULL) - (void) fprintf(stderr, "NULL strftime format "); - else (void) fprintf(stderr, "strftime format \"%s\" ", - format); - (void) fprintf(stderr, "yields only two digits of years in "); - if (warn == IN_SOME) - (void) fprintf(stderr, "some locales"); - else if (warn == IN_THIS) - (void) fprintf(stderr, "the current locale"); - else (void) fprintf(stderr, "all locales"); - (void) fprintf(stderr, "\n"); - } -#endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */ - if (p == s + maxsize) - return 0; - *p = '\0'; - return p - s; -} - -static char * -_fmt(format, t, pt, ptlim, warnp) -const char * format; -const struct tm * const t; -char * pt; -const char * const ptlim; -int * warnp; -{ - int Ealternative, Oalternative, PadIndex; - struct lc_time_T *tptr = __get_current_time_locale(); - - for ( ; *format; ++format) { - if (*format == '%') { - Ealternative = 0; - Oalternative = 0; - PadIndex = PAD_DEFAULT; -label: - switch (*++format) { - case '\0': - --format; - break; - case 'A': - pt = _add((t->tm_wday < 0 || - t->tm_wday >= DAYSPERWEEK) ? - "?" : tptr->weekday[t->tm_wday], - pt, ptlim); - continue; - case 'a': - pt = _add((t->tm_wday < 0 || - t->tm_wday >= DAYSPERWEEK) ? - "?" : tptr->wday[t->tm_wday], - pt, ptlim); - continue; - case 'B': - pt = _add((t->tm_mon < 0 || - t->tm_mon >= MONSPERYEAR) ? - "?" : (Oalternative ? tptr->alt_month : - tptr->month)[t->tm_mon], - pt, ptlim); - continue; - case 'b': - case 'h': - pt = _add((t->tm_mon < 0 || - t->tm_mon >= MONSPERYEAR) ? - "?" : tptr->mon[t->tm_mon], - pt, ptlim); - continue; - case 'C': - /* - ** %C used to do a... - ** _fmt("%a %b %e %X %Y", t); - ** ...whereas now POSIX 1003.2 calls for - ** something completely different. - ** (ado, 1993-05-24) - */ - pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0, - pt, ptlim); - continue; - case 'c': - { - int warn2 = IN_SOME; - - pt = _fmt(tptr->c_fmt, t, pt, ptlim, &warn2); - if (warn2 == IN_ALL) - warn2 = IN_THIS; - if (warn2 > *warnp) - *warnp = warn2; - } - continue; - case 'D': - pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp); - continue; - case 'd': - pt = _conv(t->tm_mday, fmt_padding[PAD_FMT_DAYOFMONTH][PadIndex], - pt, ptlim); - continue; - case 'E': - if (Ealternative || Oalternative) - break; - Ealternative++; - goto label; - case 'O': - /* - ** C99 locale modifiers. - ** The sequences - ** %Ec %EC %Ex %EX %Ey %EY - ** %Od %oe %OH %OI %Om %OM - ** %OS %Ou %OU %OV %Ow %OW %Oy - ** are supposed to provide alternate - ** representations. - ** - ** FreeBSD extension - ** %OB - */ - if (Ealternative || Oalternative) - break; - Oalternative++; - goto label; - case 'e': - pt = _conv(t->tm_mday, - fmt_padding[PAD_FMT_SDAYOFMONTH][PadIndex], pt, ptlim); - continue; - case 'F': - pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp); - continue; - case 'H': - pt = _conv(t->tm_hour, fmt_padding[PAD_FMT_HMS][PadIndex], - pt, ptlim); - continue; - case 'I': - pt = _conv((t->tm_hour % 12) ? - (t->tm_hour % 12) : 12, - fmt_padding[PAD_FMT_HMS][PadIndex], pt, ptlim); - continue; - case 'j': - pt = _conv(t->tm_yday + 1, - fmt_padding[PAD_FMT_DAYOFYEAR][PadIndex], pt, ptlim); - continue; - case 'k': - /* - ** This used to be... - ** _conv(t->tm_hour % 12 ? - ** t->tm_hour % 12 : 12, 2, ' '); - ** ...and has been changed to the below to - ** match SunOS 4.1.1 and Arnold Robbins' - ** strftime version 3.0. That is, "%k" and - ** "%l" have been swapped. - ** (ado, 1993-05-24) - */ - pt = _conv(t->tm_hour, fmt_padding[PAD_FMT_SHMS][PadIndex], - pt, ptlim); - continue; -#ifdef KITCHEN_SINK - case 'K': - /* - ** After all this time, still unclaimed! - */ - pt = _add("kitchen sink", pt, ptlim); - continue; -#endif /* defined KITCHEN_SINK */ - case 'l': - /* - ** This used to be... - ** _conv(t->tm_hour, 2, ' '); - ** ...and has been changed to the below to - ** match SunOS 4.1.1 and Arnold Robbin's - ** strftime version 3.0. That is, "%k" and - ** "%l" have been swapped. - ** (ado, 1993-05-24) - */ - pt = _conv((t->tm_hour % 12) ? - (t->tm_hour % 12) : 12, - fmt_padding[PAD_FMT_SHMS][PadIndex], pt, ptlim); - continue; - case 'M': - pt = _conv(t->tm_min, fmt_padding[PAD_FMT_HMS][PadIndex], - pt, ptlim); - continue; - case 'm': - pt = _conv(t->tm_mon + 1, - fmt_padding[PAD_FMT_MONTH][PadIndex], pt, ptlim); - continue; - case 'n': - pt = _add("\n", pt, ptlim); - continue; - case 'p': - pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? - tptr->pm : - tptr->am, - pt, ptlim); - continue; - case 'R': - pt = _fmt("%H:%M", t, pt, ptlim, warnp); - continue; - case 'r': - pt = _fmt(tptr->ampm_fmt, t, pt, ptlim, - warnp); - continue; - case 'S': - pt = _conv(t->tm_sec, fmt_padding[PAD_FMT_HMS][PadIndex], - pt, ptlim); - continue; - case 's': - { - struct tm tm; - char buf[INT_STRLEN_MAXIMUM( - time_t) + 1]; - time_t mkt; - - tm = *t; - mkt = mktime(&tm); - if (TYPE_SIGNED(time_t)) - (void) sprintf(buf, "%ld", - (long) mkt); - else (void) sprintf(buf, "%lu", - (unsigned long) mkt); - pt = _add(buf, pt, ptlim); - } - continue; - case 'T': - pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp); - continue; - case 't': - pt = _add("\t", pt, ptlim); - continue; - case 'U': - pt = _conv((t->tm_yday + DAYSPERWEEK - - t->tm_wday) / DAYSPERWEEK, - fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], pt, ptlim); - continue; - case 'u': - /* - ** From Arnold Robbins' strftime version 3.0: - ** "ISO 8601: Weekday as a decimal number - ** [1 (Monday) - 7]" - ** (ado, 1993-05-24) - */ - pt = _conv((t->tm_wday == 0) ? - DAYSPERWEEK : t->tm_wday, - "%d", pt, ptlim); - continue; - case 'V': /* ISO 8601 week number */ - case 'G': /* ISO 8601 year (four digits) */ - case 'g': /* ISO 8601 year (two digits) */ -/* -** From Arnold Robbins' strftime version 3.0: "the week number of the -** year (the first Monday as the first day of week 1) as a decimal number -** (01-53)." -** (ado, 1993-05-24) -** -** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn: -** "Week 01 of a year is per definition the first week which has the -** Thursday in this year, which is equivalent to the week which contains -** the fourth day of January. In other words, the first week of a new year -** is the week which has the majority of its days in the new year. Week 01 -** might also contain days from the previous year and the week before week -** 01 of a year is the last week (52 or 53) of the previous year even if -** it contains days from the new year. A week starts with Monday (day 1) -** and ends with Sunday (day 7). For example, the first week of the year -** 1997 lasts from 1996-12-30 to 1997-01-05..." -** (ado, 1996-01-02) -*/ - { - int year; - int base; - int yday; - int wday; - int w; - - year = t->tm_year; - base = TM_YEAR_BASE; - yday = t->tm_yday; - wday = t->tm_wday; - for ( ; ; ) { - int len; - int bot; - int top; - - len = isleap_sum(year, base) ? - DAYSPERLYEAR : - DAYSPERNYEAR; - /* - ** What yday (-3 ... 3) does - ** the ISO year begin on? - */ - bot = ((yday + 11 - wday) % - DAYSPERWEEK) - 3; - /* - ** What yday does the NEXT - ** ISO year begin on? - */ - top = bot - - (len % DAYSPERWEEK); - if (top < -3) - top += DAYSPERWEEK; - top += len; - if (yday >= top) { - ++base; - w = 1; - break; - } - if (yday >= bot) { - w = 1 + ((yday - bot) / - DAYSPERWEEK); - break; - } - --base; - yday += isleap_sum(year, base) ? - DAYSPERLYEAR : - DAYSPERNYEAR; - } -#ifdef XPG4_1994_04_09 - if ((w == 52 && - t->tm_mon == TM_JANUARY) || - (w == 1 && - t->tm_mon == TM_DECEMBER)) - w = 53; -#endif /* defined XPG4_1994_04_09 */ - if (*format == 'V') - pt = _conv(w, fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], - pt, ptlim); - else if (*format == 'g') { - *warnp = IN_ALL; - pt = _yconv(year, base, 0, 1, - pt, ptlim); - } else pt = _yconv(year, base, 1, 1, - pt, ptlim); - } - continue; - case 'v': - /* - ** From Arnold Robbins' strftime version 3.0: - ** "date as dd-bbb-YYYY" - ** (ado, 1993-05-24) - */ - pt = _fmt("%e-%b-%Y", t, pt, ptlim, warnp); - continue; - case 'W': - pt = _conv((t->tm_yday + DAYSPERWEEK - - (t->tm_wday ? - (t->tm_wday - 1) : - (DAYSPERWEEK - 1))) / DAYSPERWEEK, - fmt_padding[PAD_FMT_WEEKOFYEAR][PadIndex], pt, ptlim); - continue; - case 'w': - pt = _conv(t->tm_wday, "%d", pt, ptlim); - continue; - case 'X': - pt = _fmt(tptr->X_fmt, t, pt, ptlim, warnp); - continue; - case 'x': - { - int warn2 = IN_SOME; - - pt = _fmt(tptr->x_fmt, t, pt, ptlim, &warn2); - if (warn2 == IN_ALL) - warn2 = IN_THIS; - if (warn2 > *warnp) - *warnp = warn2; - } - continue; - case 'y': - *warnp = IN_ALL; - pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1, - pt, ptlim); - continue; - case 'Y': - pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1, - pt, ptlim); - continue; - case 'Z': -#ifdef TM_ZONE - if (t->TM_ZONE != NULL) - pt = _add(t->TM_ZONE, pt, ptlim); - else -#endif /* defined TM_ZONE */ - if (t->tm_isdst >= 0) - pt = _add(tzname[t->tm_isdst != 0], - pt, ptlim); - /* - ** C99 says that %Z must be replaced by the - ** empty string if the time zone is not - ** determinable. - */ - continue; - case 'z': - { - int diff; - char const * sign; - - if (t->tm_isdst < 0) - continue; -#ifdef TM_GMTOFF - diff = t->TM_GMTOFF; -#else /* !defined TM_GMTOFF */ - /* - ** C99 says that the UTC offset must - ** be computed by looking only at - ** tm_isdst. This requirement is - ** incorrect, since it means the code - ** must rely on magic (in this case - ** altzone and timezone), and the - ** magic might not have the correct - ** offset. Doing things correctly is - ** tricky and requires disobeying C99; - ** see GNU C strftime for details. - ** For now, punt and conform to the - ** standard, even though it's incorrect. - ** - ** C99 says that %z must be replaced by the - ** empty string if the time zone is not - ** determinable, so output nothing if the - ** appropriate variables are not available. - */ - if (t->tm_isdst == 0) -#ifdef USG_COMPAT - diff = -timezone; -#else /* !defined USG_COMPAT */ - continue; -#endif /* !defined USG_COMPAT */ - else -#ifdef ALTZONE - diff = -altzone; -#else /* !defined ALTZONE */ - continue; -#endif /* !defined ALTZONE */ -#endif /* !defined TM_GMTOFF */ - if (diff < 0) { - sign = "-"; - diff = -diff; - } else sign = "+"; - pt = _add(sign, pt, ptlim); - diff /= SECSPERMIN; - diff = (diff / MINSPERHOUR) * 100 + - (diff % MINSPERHOUR); - pt = _conv(diff, - fmt_padding[PAD_FMT_YEAR][PadIndex], pt, ptlim); - } - continue; - case '+': - pt = _fmt(tptr->date_fmt, t, pt, ptlim, - warnp); - continue; - case '-': - if (PadIndex != PAD_DEFAULT) - break; - PadIndex = PAD_LESS; - goto label; - case '_': - if (PadIndex != PAD_DEFAULT) - break; - PadIndex = PAD_SPACE; - goto label; - case '0': - if (PadIndex != PAD_DEFAULT) - break; - PadIndex = PAD_ZERO; - goto label; - case '%': - /* - ** X311J/88-090 (4.12.3.5): if conversion char is - ** undefined, behavior is undefined. Print out the - ** character itself as printf(3) also does. - */ - default: - break; - } - } - if (pt == ptlim) - break; - *pt++ = *format; - } - return pt; -} - -static char * -_conv(n, format, pt, ptlim) -const int n; -const char * const format; -char * const pt; -const char * const ptlim; -{ - char buf[INT_STRLEN_MAXIMUM(int) + 1]; - - (void) sprintf(buf, format, n); - return _add(buf, pt, ptlim); -} - -static char * -_add(str, pt, ptlim) -const char * str; -char * pt; -const char * const ptlim; -{ - while (pt < ptlim && (*pt = *str++) != '\0') - ++pt; - return pt; -} - -/* -** POSIX and the C Standard are unclear or inconsistent about -** what %C and %y do if the year is negative or exceeds 9999. -** Use the convention that %C concatenated with %y yields the -** same output as %Y, and that %Y contains at least 4 bytes, -** with more only if necessary. -*/ - -static char * -_yconv(a, b, convert_top, convert_yy, pt, ptlim) -const int a; -const int b; -const int convert_top; -const int convert_yy; -char * pt; -const char * const ptlim; -{ - register int lead; - register int trail; - -#define DIVISOR 100 - trail = a % DIVISOR + b % DIVISOR; - lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR; - trail %= DIVISOR; - if (trail < 0 && lead > 0) { - trail += DIVISOR; - --lead; - } else if (lead < 0 && trail > 0) { - trail -= DIVISOR; - ++lead; - } - if (convert_top) { - if (lead == 0 && trail < 0) - pt = _add("-0", pt, ptlim); - else pt = _conv(lead, "%02d", pt, ptlim); - } - if (convert_yy) - pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim); - return pt; -} |
