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| -rw-r--r-- | lib/libc/time/wcsftime.3 | 32 | ||||
| -rw-r--r-- | lib/libc/time/wcsftime.c | 573 |
2 files changed, 605 insertions, 0 deletions
diff --git a/lib/libc/time/wcsftime.3 b/lib/libc/time/wcsftime.3 new file mode 100644 index 00000000000..63e72d474c7 --- /dev/null +++ b/lib/libc/time/wcsftime.3 @@ -0,0 +1,32 @@ +.\" $OpenBSD: wcsftime.3,v 1.1 2011/10/10 14:40:25 espie Exp $ +.\" Copyright (c) 2011 Marc Espie <espie@openbsd.org> +.\" +.\" Permission to use, copy, modify, and distribute this software for any +.\" purpose with or without fee is hereby granted, provided that the above +.\" copyright notice and this permission notice appear in all copies. +.\" +.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +.\" +.Dd $Mdocdate: October 10 2011 $ +.Dt STRFTIME 3 +.Os +.Sh NAME +.Nm wcsftime +.Nd format date and time to wide characters string +.Sh SYNOPSIS +.Fd #include <wchar.h> +.Ft size_t +.Fn wcsftime "wchar_t *buf" "size_t maxsize" "const wchar_t *format" "const struct tm *timeptr" +.Sh DESCRIPTION +The +.Fn wcsftime +is a wide char equivalent of +.Xr strftime 3 . +.Sh SEE ALSO +.Xr strftime 3 diff --git a/lib/libc/time/wcsftime.c b/lib/libc/time/wcsftime.c new file mode 100644 index 00000000000..ed0db3525d1 --- /dev/null +++ b/lib/libc/time/wcsftime.c @@ -0,0 +1,573 @@ +/* $OpenBSD: wcsftime.c,v 1.1 2011/10/10 14:40:25 espie Exp $ */ +#include "private.h" + +/* +** Based on the UCB version with the ID appearing below. +** This is ANSIish only when "multibyte character == plain character". +** +** Copyright (c) 1989, 1993 +** The Regents of the University of California. All rights reserved. +** +** 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. +** 3. Neither the name of the University nor the names of its contributors +** may be used to endorse or promote products derived from this software +** without specific prior written permission. +** +** THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 "tzfile.h" +#include "fcntl.h" +#include <locale.h> +#include <wchar.h> + +struct lc_time_T { + const wchar_t * mon[MONSPERYEAR]; + const wchar_t * month[MONSPERYEAR]; + const wchar_t * wday[DAYSPERWEEK]; + const wchar_t * weekday[DAYSPERWEEK]; + const wchar_t * X_fmt; + const wchar_t * x_fmt; + const wchar_t * c_fmt; + const wchar_t * am; + const wchar_t * pm; + const wchar_t * date_fmt; +}; + +#define Locale (&C_time_locale) + +static const struct lc_time_T C_time_locale = { + { + L"Jan", L"Feb", L"Mar", L"Apr", L"May", L"Jun", + L"Jul", L"Aug", L"Sep", L"Oct", L"Nov", L"Dec" + }, { + L"January", L"February", L"March", L"April", L"May", L"June", + L"July", L"August", L"September", L"October", L"November", + L"December" + }, { + L"Sun", L"Mon", L"Tue", L"Wed", + L"Thu", L"Fri", L"Sat" + }, { + L"Sunday", L"Monday", L"Tuesday", L"Wednesday", + L"Thursday", L"Friday", L"Saturday" + }, + + /* X_fmt */ + L"%H:%M:%S", + + /* + ** x_fmt + ** C99 requires this format. + ** Using just numbers (as here) makes Quakers happier; + ** it's also compatible with SVR4. + */ + L"%m/%d/%y", + + /* + ** c_fmt + ** C99 requires this format. + ** Previously this code used "%D %X", but we now conform to C99. + ** Note that + ** "%a %b %d %H:%M:%S %Y" + ** is used by Solaris 2.3. + */ + L"%a %b %e %T %Y", + + /* am */ + L"AM", + + /* pm */ + L"PM", + + /* date_fmt */ + L"%a %b %e %H:%M:%S %Z %Y" +}; + +#define UNKNOWN L"?" +static wchar_t * _add(const wchar_t *, wchar_t *, const wchar_t *); +static wchar_t * _sadd(const char *, wchar_t *, const wchar_t *); +static wchar_t * _conv(int, const wchar_t *, wchar_t *, const wchar_t *); +static wchar_t * _fmt(const wchar_t *, const struct tm *, wchar_t *, const wchar_t *, + int *); +static wchar_t * _yconv(int, int, int, int, wchar_t *, const wchar_t *); + +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 + +size_t +wcsftime(wchar_t *__restrict s, size_t maxsize, + const wchar_t *__restrict format, const struct tm *__restrict t) +{ + wchar_t *p; + int warn; + + tzset(); + warn = IN_NONE; + p = _fmt(((format == NULL) ? L"%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) fwprintf(stderr, "strftime format \"%ls\" ", + 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) { + if (maxsize > 0) + s[maxsize - 1] = '\0'; + return 0; + } + *p = L'\0'; + return p - s; +} + +static wchar_t * +_fmt(const wchar_t *format, const struct tm *t, wchar_t *pt, + const wchar_t *ptlim, int *warnp) +{ + for ( ; *format; ++format) { + if (*format != L'%') { + if (pt == ptlim) + break; + *pt++ = *format; + continue; + } +label: + switch (*++format) { + case '\0': + --format; + break; + case 'A': + pt = _add((t->tm_wday < 0 || + t->tm_wday >= DAYSPERWEEK) ? + UNKNOWN : Locale->weekday[t->tm_wday], + pt, ptlim); + continue; + case 'a': + pt = _add((t->tm_wday < 0 || + t->tm_wday >= DAYSPERWEEK) ? + UNKNOWN : Locale->wday[t->tm_wday], + pt, ptlim); + continue; + case 'B': + pt = _add((t->tm_mon < 0 || + t->tm_mon >= MONSPERYEAR) ? + UNKNOWN : Locale->month[t->tm_mon], + pt, ptlim); + continue; + case 'b': + case 'h': + pt = _add((t->tm_mon < 0 || + t->tm_mon >= MONSPERYEAR) ? + UNKNOWN : Locale->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(Locale->c_fmt, t, pt, ptlim, &warn2); + if (warn2 == IN_ALL) + warn2 = IN_THIS; + if (warn2 > *warnp) + *warnp = warn2; + } + continue; + case 'D': + pt = _fmt(L"%m/%d/%y", t, pt, ptlim, warnp); + continue; + case 'd': + pt = _conv(t->tm_mday, L"%02d", pt, ptlim); + continue; + case 'E': + 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. + */ + goto label; + case 'e': + pt = _conv(t->tm_mday, L"%2d", pt, ptlim); + continue; + case 'F': + pt = _fmt(L"%Y-%m-%d", t, pt, ptlim, warnp); + continue; + case 'H': + pt = _conv(t->tm_hour, L"%02d", pt, ptlim); + continue; + case 'I': + pt = _conv((t->tm_hour % 12) ? + (t->tm_hour % 12) : 12, + L"%02d", pt, ptlim); + continue; + case 'j': + pt = _conv(t->tm_yday + 1, L"%03d", 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, L"%2d", pt, ptlim); + continue; + 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, + L"%2d", pt, ptlim); + continue; + case 'M': + pt = _conv(t->tm_min, L"%02d", pt, ptlim); + continue; + case 'm': + pt = _conv(t->tm_mon + 1, L"%02d", pt, ptlim); + continue; + case 'n': + pt = _add(L"\n", pt, ptlim); + continue; + case 'p': + pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ? + Locale->pm : + Locale->am, + pt, ptlim); + continue; + case 'R': + pt = _fmt(L"%H:%M", t, pt, ptlim, warnp); + continue; + case 'r': + pt = _fmt(L"%I:%M:%S %p", t, pt, ptlim, warnp); + continue; + case 'S': + pt = _conv(t->tm_sec, L"%02d", pt, ptlim); + continue; + case 's': + { + struct tm tm; + wchar_t buf[INT_STRLEN_MAXIMUM( + time_t) + 1]; + time_t mkt; + + tm = *t; + mkt = mktime(&tm); + if (TYPE_SIGNED(time_t)) + (void) swprintf(buf, + sizeof buf/sizeof buf[0], + L"%ld", (long) mkt); + else + (void) swprintf(buf, + sizeof buf/sizeof buf[0], + L"%lu", (unsigned long) mkt); + pt = _add(buf, pt, ptlim); + } + continue; + case 'T': + pt = _fmt(L"%H:%M:%S", t, pt, ptlim, warnp); + continue; + case 't': + pt = _add(L"\t", pt, ptlim); + continue; + case 'U': + pt = _conv((t->tm_yday + DAYSPERWEEK - + t->tm_wday) / DAYSPERWEEK, + L"%02d", 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, + L"%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; + } + if ((w == 52 && t->tm_mon == TM_JANUARY) || + (w == 1 && t->tm_mon == TM_DECEMBER)) + w = 53; + if (*format == 'V') + pt = _conv(w, L"%02d", 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(L"%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, + L"%02d", pt, ptlim); + continue; + case 'w': + pt = _conv(t->tm_wday, L"%d", pt, ptlim); + continue; + case 'X': + pt = _fmt(Locale->X_fmt, t, pt, ptlim, warnp); + continue; + case 'x': + { + int warn2 = IN_SOME; + + pt = _fmt(Locale->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': + if (t->tm_zone != NULL) + pt = _sadd(t->TM_ZONE, pt, ptlim); + else + if (t->tm_isdst >= 0) + pt = _sadd(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; + wchar_t const * sign; + + if (t->tm_isdst < 0) + continue; + diff = t->tm_gmtoff; + if (diff < 0) { + sign = L"-"; + diff = -diff; + } else + sign = L"+"; + pt = _add(sign, pt, ptlim); + diff /= SECSPERMIN; + diff = (diff / MINSPERHOUR) * 100 + + (diff % MINSPERHOUR); + pt = _conv(diff, L"%04d", pt, ptlim); + } + continue; + case '+': + pt = _fmt(Locale->date_fmt, t, pt, ptlim, warnp); + continue; + case '%': + /* + ** X311J/88-090 (4.12.3.5): if conversion wchar_t is + ** undefined, behavior is undefined. Print out the + ** character itself as printf(3) also does. + */ + default: + break; + } + } + return pt; +} + +static wchar_t * +_conv(int n, const wchar_t *format, wchar_t *pt, const wchar_t *ptlim) +{ + wchar_t buf[INT_STRLEN_MAXIMUM(int) + 1]; + + (void) swprintf(buf, sizeof buf/sizeof buf[0], format, n); + return _add(buf, pt, ptlim); +} + +static wchar_t * +_add(const wchar_t *str, wchar_t *pt, const wchar_t *ptlim) +{ + while (pt < ptlim && (*pt = *str++) != L'\0') + ++pt; + return pt; +} + +static wchar_t * +_sadd(const char *str, wchar_t *pt, const wchar_t *ptlim) +{ + while (pt < ptlim && (*pt = btowc(*str++)) != L'\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 wchar_t * +_yconv(int a, int b, int convert_top, int convert_yy, wchar_t *pt, + const wchar_t *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(L"-0", pt, ptlim); + else pt = _conv(lead, L"%02d", pt, ptlim); + } + if (convert_yy) + pt = _conv(((trail < 0) ? -trail : trail), L"%02d", pt, ptlim); + return pt; +} + |