ce4783ce76
Well, kinda... localtime.c still contains a bunch of Android-specific hacks, as does strftime.c. But the other files are now exactly the same as upstream. This catches up with several years of bug fixes, and fixes most of the compiler warnings that were in this code. (Just two remain.) Bug: 1744909 Change-Id: I2ddfecb6fd408c847397c17afb0fff859e27feef
771 lines
26 KiB
C
771 lines
26 KiB
C
#ifndef lint
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#ifndef NOID
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static char elsieid[] = "@(#)strftime.c 8.1";
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/*
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** Based on the UCB version with the ID appearing below.
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** This is ANSIish only when "multibyte character == plain character".
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*/
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#endif /* !defined NOID */
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#endif /* !defined lint */
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#include "private.h"
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/*
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** Copyright (c) 1989 The Regents of the University of California.
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms are permitted
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** provided that the above copyright notice and this paragraph are
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** duplicated in all such forms and that any documentation,
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** advertising materials, and other materials related to such
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** distribution and use acknowledge that the software was developed
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** by the University of California, Berkeley. The name of the
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** University may not be used to endorse or promote products derived
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** from this software without specific prior written permission.
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** THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#ifndef LIBC_SCCS
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#ifndef lint
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static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89";
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#endif /* !defined lint */
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#endif /* !defined LIBC_SCCS */
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#include "tzfile.h"
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#include "fcntl.h"
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#include "locale.h"
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#include <ctype.h>
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#include <time64.h>
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#include <bionic_time.h> /* for strftime_tz */
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/* struct lc_time_T is now defined as strftime_locale
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* in <time.h>
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*/
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#if 1
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#define lc_time_T strftime_locale
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#else
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struct lc_time_T {
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const char * mon[MONSPERYEAR];
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const char * month[MONSPERYEAR];
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const char * wday[DAYSPERWEEK];
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const char * weekday[DAYSPERWEEK];
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const char * X_fmt;
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const char * x_fmt;
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const char * c_fmt;
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const char * am;
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const char * pm;
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const char * date_fmt;
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};
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#endif
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#define Locale (&C_time_locale)
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static const struct lc_time_T C_time_locale = {
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{
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"Jan", "Feb", "Mar", "Apr", "May", "Jun",
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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}, {
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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}, {
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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}, {
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"Sun", "Mon", "Tue", "Wed",
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"Thu", "Fri", "Sat"
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}, {
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"Sunday", "Monday", "Tuesday", "Wednesday",
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"Thursday", "Friday", "Saturday"
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},
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/* X_fmt */
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"%H:%M:%S",
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/*
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** x_fmt
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** C99 requires this format.
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** Using just numbers (as here) makes Quakers happier;
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** it's also compatible with SVR4.
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*/
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"%m/%d/%y",
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/*
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** c_fmt
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** C99 requires this format.
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** Previously this code used "%D %X", but we now conform to C99.
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** Note that
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** "%a %b %d %H:%M:%S %Y"
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** is used by Solaris 2.3.
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*/
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"%a %b %e %T %Y",
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/* am */
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"AM",
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/* pm */
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"PM",
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/* date_fmt */
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"%a %b %e %H:%M:%S %Z %Y"
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};
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static char * _add(const char *, char *, const char *, int);
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static char * _conv(int, const char *, char *, const char *);
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static char * _fmt(const char *, const struct tm *, char *, const char *,
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int *, const struct strftime_locale*);
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static char * _yconv(int, int, int, int, char *, const char *, int);
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static char * getformat(int, char *, char *, char *, char *);
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extern char * tzname[];
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#ifndef YEAR_2000_NAME
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#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS"
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#endif /* !defined YEAR_2000_NAME */
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#define IN_NONE 0
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#define IN_SOME 1
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#define IN_THIS 2
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#define IN_ALL 3
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#define FORCE_LOWER_CASE 0x100
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size_t
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strftime(s, maxsize, format, t)
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char * const s;
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const size_t maxsize;
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const char * const format;
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const struct tm * const t;
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{
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return strftime_tz(s, maxsize, format, t, Locale);
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}
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size_t
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strftime_tz(s, maxsize, format, t, locale)
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char * const s;
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const size_t maxsize;
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const char * const format;
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const struct tm * const t;
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const struct strftime_locale *locale;
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{
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char * p;
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int warn;
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tzset();
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warn = IN_NONE;
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p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn, locale);
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#if 0 /* ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */
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if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) {
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(void) fprintf(stderr, "\n");
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if (format == NULL)
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(void) fprintf(stderr, "NULL strftime format ");
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else (void) fprintf(stderr, "strftime format \"%s\" ",
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format);
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(void) fprintf(stderr, "yields only two digits of years in ");
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if (warn == IN_SOME)
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(void) fprintf(stderr, "some locales");
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else if (warn == IN_THIS)
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(void) fprintf(stderr, "the current locale");
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else (void) fprintf(stderr, "all locales");
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(void) fprintf(stderr, "\n");
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}
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#endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */
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if (p == s + maxsize)
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return 0;
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*p = '\0';
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return p - s;
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}
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static char *getformat(int modifier, char *normal, char *underscore,
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char *dash, char *zero) {
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switch (modifier) {
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case '_':
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return underscore;
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case '-':
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return dash;
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case '0':
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return zero;
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}
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return normal;
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}
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static char *
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_fmt(format, t, pt, ptlim, warnp, locale)
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const char * format;
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const struct tm * const t;
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char * pt;
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const char * const ptlim;
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int * warnp;
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const struct strftime_locale* locale;
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{
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for ( ; *format; ++format) {
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if (*format == '%') {
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int modifier = 0;
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label:
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switch (*++format) {
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case '\0':
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--format;
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break;
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case 'A':
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pt = _add((t->tm_wday < 0 ||
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t->tm_wday >= DAYSPERWEEK) ?
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"?" : locale->weekday[t->tm_wday],
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pt, ptlim, modifier);
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continue;
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case 'a':
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pt = _add((t->tm_wday < 0 ||
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t->tm_wday >= DAYSPERWEEK) ?
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"?" : locale->wday[t->tm_wday],
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pt, ptlim, modifier);
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continue;
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case 'B':
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if (modifier == '-') {
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pt = _add((t->tm_mon < 0 ||
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t->tm_mon >= MONSPERYEAR) ?
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"?" : locale->standalone_month[t->tm_mon],
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pt, ptlim, modifier);
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} else {
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pt = _add((t->tm_mon < 0 ||
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t->tm_mon >= MONSPERYEAR) ?
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"?" : locale->month[t->tm_mon],
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pt, ptlim, modifier);
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}
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continue;
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case 'b':
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case 'h':
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pt = _add((t->tm_mon < 0 ||
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t->tm_mon >= MONSPERYEAR) ?
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"?" : locale->mon[t->tm_mon],
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pt, ptlim, modifier);
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continue;
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case 'C':
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/*
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** %C used to do a...
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** _fmt("%a %b %e %X %Y", t);
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** ...whereas now POSIX 1003.2 calls for
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** something completely different.
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** (ado, 1993-05-24)
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*/
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pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0,
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pt, ptlim, modifier);
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continue;
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case 'c':
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{
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int warn2 = IN_SOME;
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pt = _fmt(locale->c_fmt, t, pt, ptlim, warnp, locale);
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if (warn2 == IN_ALL)
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warn2 = IN_THIS;
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if (warn2 > *warnp)
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*warnp = warn2;
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}
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continue;
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case 'D':
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pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp, locale);
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continue;
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case 'd':
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pt = _conv(t->tm_mday,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'E':
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case 'O':
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/*
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** C99 locale modifiers.
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** The sequences
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** %Ec %EC %Ex %EX %Ey %EY
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** %Od %oe %OH %OI %Om %OM
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** %OS %Ou %OU %OV %Ow %OW %Oy
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** are supposed to provide alternate
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** representations.
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*/
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goto label;
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case '_':
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case '-':
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case '0':
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case '^':
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case '#':
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modifier = *format;
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goto label;
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case 'e':
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pt = _conv(t->tm_mday,
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getformat(modifier, "%2d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'F':
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pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp, locale);
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continue;
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case 'H':
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pt = _conv(t->tm_hour,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'I':
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pt = _conv((t->tm_hour % 12) ?
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(t->tm_hour % 12) : 12,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'j':
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pt = _conv(t->tm_yday + 1,
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getformat(modifier, "%03d", "%3d", "%d", "%03d"),
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pt, ptlim);
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continue;
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case 'k':
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/*
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** This used to be...
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** _conv(t->tm_hour % 12 ?
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** t->tm_hour % 12 : 12, 2, ' ');
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** ...and has been changed to the below to
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** match SunOS 4.1.1 and Arnold Robbins'
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** strftime version 3.0. That is, "%k" and
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** "%l" have been swapped.
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** (ado, 1993-05-24)
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*/
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pt = _conv(t->tm_hour,
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getformat(modifier, "%2d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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#ifdef KITCHEN_SINK
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case 'K':
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/*
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** After all this time, still unclaimed!
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*/
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pt = _add("kitchen sink", pt, ptlim, modifier);
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continue;
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#endif /* defined KITCHEN_SINK */
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case 'l':
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/*
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** This used to be...
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** _conv(t->tm_hour, 2, ' ');
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** ...and has been changed to the below to
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** match SunOS 4.1.1 and Arnold Robbin's
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** strftime version 3.0. That is, "%k" and
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** "%l" have been swapped.
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** (ado, 1993-05-24)
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*/
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pt = _conv((t->tm_hour % 12) ?
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(t->tm_hour % 12) : 12,
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getformat(modifier, "%2d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'M':
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pt = _conv(t->tm_min,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'm':
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pt = _conv(t->tm_mon + 1,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'n':
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pt = _add("\n", pt, ptlim, modifier);
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continue;
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case 'p':
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pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
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locale->pm :
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locale->am,
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pt, ptlim, modifier);
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continue;
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case 'P':
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pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
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locale->pm :
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locale->am,
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pt, ptlim, FORCE_LOWER_CASE);
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continue;
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case 'R':
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pt = _fmt("%H:%M", t, pt, ptlim, warnp, locale);
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continue;
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case 'r':
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pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp, locale);
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continue;
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case 'S':
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pt = _conv(t->tm_sec,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 's':
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{
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struct tm tm;
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char buf[INT_STRLEN_MAXIMUM(
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time64_t) + 1];
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time64_t mkt;
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tm = *t;
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mkt = mktime64(&tm);
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if (TYPE_SIGNED(time64_t))
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(void) snprintf(buf, sizeof(buf), "%lld",
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(long long) mkt);
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else (void) snprintf(buf, sizeof(buf), "%llu",
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(unsigned long long) mkt);
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pt = _add(buf, pt, ptlim, modifier);
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}
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continue;
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case 'T':
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pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp, locale);
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continue;
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case 't':
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pt = _add("\t", pt, ptlim, modifier);
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continue;
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case 'U':
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pt = _conv((t->tm_yday + DAYSPERWEEK -
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t->tm_wday) / DAYSPERWEEK,
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getformat(modifier, "%02d",
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"%2d", "%d", "%02d"),
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pt, ptlim);
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continue;
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case 'u':
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/*
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** From Arnold Robbins' strftime version 3.0:
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** "ISO 8601: Weekday as a decimal number
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** [1 (Monday) - 7]"
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** (ado, 1993-05-24)
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*/
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pt = _conv((t->tm_wday == 0) ?
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DAYSPERWEEK : t->tm_wday, "%d", pt, ptlim);
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continue;
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case 'V': /* ISO 8601 week number */
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case 'G': /* ISO 8601 year (four digits) */
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case 'g': /* ISO 8601 year (two digits) */
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/*
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** From Arnold Robbins' strftime version 3.0: "the week number of the
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** year (the first Monday as the first day of week 1) as a decimal number
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** (01-53)."
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** (ado, 1993-05-24)
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**
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** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn:
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** "Week 01 of a year is per definition the first week which has the
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** Thursday in this year, which is equivalent to the week which contains
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** the fourth day of January. In other words, the first week of a new year
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** is the week which has the majority of its days in the new year. Week 01
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** might also contain days from the previous year and the week before week
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** 01 of a year is the last week (52 or 53) of the previous year even if
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** it contains days from the new year. A week starts with Monday (day 1)
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** and ends with Sunday (day 7). For example, the first week of the year
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** 1997 lasts from 1996-12-30 to 1997-01-05..."
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** (ado, 1996-01-02)
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*/
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{
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int year;
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int base;
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int yday;
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int wday;
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int w;
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year = t->tm_year;
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base = TM_YEAR_BASE;
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yday = t->tm_yday;
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wday = t->tm_wday;
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for ( ; ; ) {
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int len;
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int bot;
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int top;
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len = isleap_sum(year, base) ?
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DAYSPERLYEAR :
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DAYSPERNYEAR;
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/*
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** What yday (-3 ... 3) does
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** the ISO year begin on?
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*/
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bot = ((yday + 11 - wday) %
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DAYSPERWEEK) - 3;
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/*
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** What yday does the NEXT
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** ISO year begin on?
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*/
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top = bot -
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(len % DAYSPERWEEK);
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if (top < -3)
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top += DAYSPERWEEK;
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top += len;
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if (yday >= top) {
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++base;
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w = 1;
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break;
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}
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if (yday >= bot) {
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w = 1 + ((yday - bot) /
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DAYSPERWEEK);
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break;
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}
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--base;
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yday += isleap_sum(year, base) ?
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DAYSPERLYEAR :
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DAYSPERNYEAR;
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}
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#ifdef XPG4_1994_04_09
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if ((w == 52 &&
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t->tm_mon == TM_JANUARY) ||
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(w == 1 &&
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t->tm_mon == TM_DECEMBER))
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|
w = 53;
|
|
#endif /* defined XPG4_1994_04_09 */
|
|
if (*format == 'V')
|
|
pt = _conv(w,
|
|
getformat(modifier,
|
|
"%02d",
|
|
"%2d",
|
|
"%d",
|
|
"%02d"),
|
|
pt, ptlim);
|
|
else if (*format == 'g') {
|
|
*warnp = IN_ALL;
|
|
pt = _yconv(year, base, 0, 1,
|
|
pt, ptlim, modifier);
|
|
} else pt = _yconv(year, base, 1, 1,
|
|
pt, ptlim, modifier);
|
|
}
|
|
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, locale);
|
|
continue;
|
|
case 'W':
|
|
pt = _conv((t->tm_yday + DAYSPERWEEK -
|
|
(t->tm_wday ?
|
|
(t->tm_wday - 1) :
|
|
(DAYSPERWEEK - 1))) / DAYSPERWEEK,
|
|
getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
continue;
|
|
case 'w':
|
|
pt = _conv(t->tm_wday, "%d", pt, ptlim);
|
|
continue;
|
|
case 'X':
|
|
pt = _fmt(locale->X_fmt, t, pt, ptlim, warnp, locale);
|
|
continue;
|
|
case 'x':
|
|
{
|
|
int warn2 = IN_SOME;
|
|
|
|
pt = _fmt(locale->x_fmt, t, pt, ptlim, &warn2, locale);
|
|
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, modifier);
|
|
continue;
|
|
case 'Y':
|
|
pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1,
|
|
pt, ptlim, modifier);
|
|
continue;
|
|
case 'Z':
|
|
#ifdef TM_ZONE
|
|
if (t->TM_ZONE != NULL)
|
|
pt = _add(t->TM_ZONE, pt, ptlim,
|
|
modifier);
|
|
else
|
|
#endif /* defined TM_ZONE */
|
|
if (t->tm_isdst >= 0)
|
|
pt = _add(tzname[t->tm_isdst != 0],
|
|
pt, ptlim, modifier);
|
|
/*
|
|
** 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, modifier);
|
|
diff /= SECSPERMIN;
|
|
diff = (diff / MINSPERHOUR) * 100 +
|
|
(diff % MINSPERHOUR);
|
|
pt = _conv(diff,
|
|
getformat(modifier, "%04d",
|
|
"%4d", "%d", "%04d"),
|
|
pt, ptlim);
|
|
}
|
|
continue;
|
|
case '+':
|
|
pt = _fmt(locale->date_fmt, t, pt, ptlim,
|
|
warnp, locale);
|
|
continue;
|
|
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) snprintf(buf, sizeof(buf), format, n);
|
|
return _add(buf, pt, ptlim, 0);
|
|
}
|
|
|
|
static char *
|
|
_add(str, pt, ptlim, modifier)
|
|
const char * str;
|
|
char * pt;
|
|
const char * const ptlim;
|
|
int modifier;
|
|
{
|
|
int c;
|
|
|
|
switch (modifier) {
|
|
case FORCE_LOWER_CASE:
|
|
while (pt < ptlim && (*pt = tolower(*str++)) != '\0') {
|
|
++pt;
|
|
}
|
|
break;
|
|
|
|
case '^':
|
|
while (pt < ptlim && (*pt = toupper(*str++)) != '\0') {
|
|
++pt;
|
|
}
|
|
break;
|
|
|
|
case '#':
|
|
while (pt < ptlim && (c = *str++) != '\0') {
|
|
if (isupper(c)) {
|
|
c = tolower(c);
|
|
} else if (islower(c)) {
|
|
c = toupper(c);
|
|
}
|
|
*pt = c;
|
|
++pt;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
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, modifier)
|
|
const int a;
|
|
const int b;
|
|
const int convert_top;
|
|
const int convert_yy;
|
|
char * pt;
|
|
const char * const ptlim;
|
|
int modifier;
|
|
{
|
|
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, modifier);
|
|
else pt = _conv(lead, getformat(modifier, "%02d",
|
|
"%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
}
|
|
if (convert_yy)
|
|
pt = _conv(((trail < 0) ? -trail : trail),
|
|
getformat(modifier, "%02d", "%2d", "%d", "%02d"),
|
|
pt, ptlim);
|
|
return pt;
|
|
}
|