port/locale/strftime.c

4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore/*
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore * Copyright 2013 Garrett D'Amore <garrett@damore.org>
6b5e5868e7ebf1aff3a5abd7d0c4ef0e5fbf3648Garrett D'Amore * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * Copyright (c) 1989 The Regents of the University of California.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * All rights reserved.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore *
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * Redistribution and use in source and binary forms are permitted
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * provided that the above copyright notice and this paragraph are
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * duplicated in all such forms and that any documentation,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * advertising materials, and other materials related to such
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * distribution and use acknowledge that the software was developed
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * by the University of California, Berkeley. The name of the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * University may not be used to endorse or promote products derived
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * from this software without specific prior written permission.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include "lint.h"
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include "tzfile.h"
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include <fcntl.h>
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include <sys/stat.h>
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include <string.h>
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include <stdio.h>
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore#include <locale.h>
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#include "timelocal.h"
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore#include "localeimpl.h"
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *_add(const char *, char *, const char *);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *_conv(int, const char *, char *, const char *);
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amorestatic char *_fmt(locale_t, const char *, const struct tm *, char *,
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    const char * const);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *_yconv(int, int, int, int, char *, const char *);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amoreextern char *tzname[];
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define IN_NONE 0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define IN_SOME 1
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define IN_THIS 2
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define IN_ALL  3
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_DEFAULT 0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_LESS    1
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_SPACE   2
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_ZERO    3
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic const char *fmt_padding[][4] = {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    /* DEFAULT, LESS,   SPACE,  ZERO */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_MONTHDAY    0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_HMS     0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_CENTURY     0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_SHORTYEAR   0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_MONTH       0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_WEEKOFYEAR  0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_DAYOFMONTH  0
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    { "%02d",   "%d",   "%2d",  "%02d" },
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_SDAYOFMONTH 1
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_SHMS        1
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    { "%2d",    "%d",   "%2d",  "%02d" },
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_DAYOFYEAR   2
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    { "%03d",   "%d",   "%3d",  "%03d" },
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PAD_FMT_YEAR        3
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    { "%04d",   "%d",   "%4d",  "%04d" }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore};
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amoresize_t
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amorestrftime_l(char *_RESTRICT_KYWD s, size_t maxsize,
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    const char *_RESTRICT_KYWD format, const struct tm *_RESTRICT_KYWD t,
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    locale_t loc)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore{
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    char *p;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    tzset();
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    p = _fmt(loc, ((format == NULL) ? "%c" : format), t, s, s + maxsize);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    if (p == s + maxsize)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        return (0);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    *p = '\0';
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    return (p - s);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore}
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amoresize_t
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amorestrftime(char *_RESTRICT_KYWD s, size_t maxsize,
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    const char *_RESTRICT_KYWD format, const struct tm *_RESTRICT_KYWD t)
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore{
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    return (strftime_l(s, maxsize, format, t, uselocale(NULL)));
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore}
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore_fmt(locale_t loc, const char *format, const struct tm *t, char *pt,
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    const char * const ptlim)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore{
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    int Ealternative, Oalternative, PadIndex;
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore    const struct lc_time *tptr = loc->time;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define PADDING(x)  fmt_padding[x][PadIndex]
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    for (; *format; ++format) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        if (*format == '%') {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            Ealternative = 0;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            Oalternative = 0;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            PadIndex     = PAD_DEFAULT;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorelabel:
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            switch (*++format) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case '\0':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                --format;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'A':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add((t->tm_wday < 0 ||
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    t->tm_wday >= DAYSPERWEEK) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    "?" : tptr->weekday[t->tm_wday],
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'a':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add((t->tm_wday < 0 ||
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    t->tm_wday >= DAYSPERWEEK) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    "?" : tptr->wday[t->tm_wday],
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'B':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add((t->tm_mon < 0 ||
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    t->tm_mon >= MONSPERYEAR) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    "?" : (tptr->month)[t->tm_mon],
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'b':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'h':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add((t->tm_mon < 0 ||
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    t->tm_mon >= MONSPERYEAR) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    "?" : tptr->mon[t->tm_mon],
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'C':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * %C used to do a...
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *  _fmt("%a %b %e %X %Y", t);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * ...whereas now POSIX 1003.2 calls for
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * something completely different.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * (ado, 1993-05-24)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 0,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'c':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, tptr->c_fmt, t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'D':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, "%m/%d/%y", t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'd':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_mday,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_DAYOFMONTH), pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'E':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (Ealternative || Oalternative)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                Ealternative++;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                goto label;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'O':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * C99 locale modifiers.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * The sequences
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *  %Ec %EC %Ex %EX %Ey %EY
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *  %Od %oe %OH %OI %Om %OM
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *  %OS %Ou %OU %OV %Ow %OW %Oy
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * are supposed to provide alternate
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * representations.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (Ealternative || Oalternative)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                Oalternative++;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                goto label;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'e':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_mday,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_SDAYOFMONTH), pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'F':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, "%Y-%m-%d", t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'H':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_hour, PADDING(PAD_FMT_HMS),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'I':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv((t->tm_hour % 12) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (t->tm_hour % 12) : 12,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_HMS), pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'j':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_yday + 1,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_DAYOFYEAR), pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'k':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * This used to be...
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *  _conv(t->tm_hour % 12 ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *      t->tm_hour % 12 : 12, 2, ' ');
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * ...and has been changed to the below to
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * match SunOS 4.1.1 and Arnold Robbins'
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * strftime version 3.0. That is, "%k" and
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * "%l" have been swapped.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * (ado, 1993-05-24)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_hour,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_SHMS), pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'l':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * This used to be...
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *  _conv(t->tm_hour, 2, ' ');
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * ...and has been changed to the below to
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * match SunOS 4.1.1 and Arnold Robbin's
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * strftime version 3.0. That is, "%k" and
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * "%l" have been swapped.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * (ado, 1993-05-24)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv((t->tm_hour % 12) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (t->tm_hour % 12) : 12,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_SHMS), pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'M':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_min, PADDING(PAD_FMT_HMS),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'm':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_mon + 1,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_MONTH),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'n':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add("\n", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'p':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    tptr->pm : tptr->am, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'R':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, "%H:%M", t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'r':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, tptr->ampm_fmt, t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'S':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_sec, PADDING(PAD_FMT_HMS),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore            case 's':
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore            {
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore                struct tm tm;
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore                char *buf;
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore                tm = *t;
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore                (void) asprintf(&buf, "%ld", mktime(&tm));
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore                pt = _add(buf, pt, ptlim);
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore                continue;
6eaad1d3bb5bc6d4b1e87f2660b6d3a6e9fc2155Garrett D'Amore            }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'T':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, "%H:%M:%S", t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 't':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add("\t", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'U':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv((t->tm_yday + DAYSPERWEEK -
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    t->tm_wday) / DAYSPERWEEK,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_WEEKOFYEAR),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'u':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * From Arnold Robbins' strftime version 3.0:
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * "ISO 8601: Weekday as a decimal number
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * [1 (Monday) - 7]"
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * (ado, 1993-05-24)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv((t->tm_wday == 0) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    DAYSPERWEEK : t->tm_wday,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    "%d", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'V':   /* ISO 8601 week number */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'G':   /* ISO 8601 year (four digits) */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'g':   /* ISO 8601 year (two digits) */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore/*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * From Arnold Robbins' strftime version 3.0: "the week number of the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * year (the first Monday as the first day of week 1) as a decimal number
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * (01-53)."
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * (ado, 1993-05-24)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore *
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn:
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * "Week 01 of a year is per definition the first week which has the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * Thursday in this year, which is equivalent to the week which contains
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * the fourth day of January. In other words, the first week of a new year
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * is the week which has the majority of its days in the new year. Week 01
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * might also contain days from the previous year and the week before week
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * 01 of a year is the last week (52 or 53) of the previous year even if
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * it contains days from the new year. A week starts with Monday (day 1)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * and ends with Sunday (day 7). For example, the first week of the year
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * 1997 lasts from 1996-12-30 to 1997-01-05..."
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * (ado, 1996-01-02)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                int year;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                int base;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                int yday;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                int wday;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                int w;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                year = t->tm_year;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                base = TM_YEAR_BASE;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                yday = t->tm_yday;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                wday = t->tm_wday;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                for (;;) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    int len;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    int bot;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    int top;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    len = isleap_sum(year, base) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        DAYSPERLYEAR : DAYSPERNYEAR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                     * What yday (-3 ... 3) does
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                     * the ISO year begin on?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                     */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    bot = ((yday + 11 - wday) %
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        DAYSPERWEEK) - 3;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                     * What yday does the NEXT
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                     * ISO year begin on?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                     */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    top = bot - (len % DAYSPERWEEK);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    if (top < -3)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        top += DAYSPERWEEK;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    top += len;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    if (yday >= top) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        ++base;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        w = 1;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    if (yday >= bot) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        w = 1 + ((yday - bot) /
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                            DAYSPERWEEK);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    --base;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    yday += isleap_sum(year, base) ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        DAYSPERLYEAR : DAYSPERNYEAR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#ifdef XPG4_1994_04_09
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if ((w == 52 && t->tm_mon == TM_JANUARY) ||
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (w == 1 && t->tm_mon == TM_DECEMBER))
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    w = 53;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#endif /* defined XPG4_1994_04_09 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (*format == 'V')
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt = _conv(w,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        PADDING(PAD_FMT_WEEKOFYEAR),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                else if (*format == 'g') {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt = _yconv(year, base, 0, 1,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                } else
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt = _yconv(year, base, 1, 1,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'v':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * From Arnold Robbins' strftime version 3.0:
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * "date as dd-bbb-YYYY"
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * (ado, 1993-05-24)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, "%e-%b-%Y", t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'W':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv((t->tm_yday + DAYSPERWEEK -
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (t->tm_wday ?
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (t->tm_wday - 1) :
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (DAYSPERWEEK - 1))) / DAYSPERWEEK,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    PADDING(PAD_FMT_WEEKOFYEAR),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'w':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(t->tm_wday, "%d", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'X':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, tptr->X_fmt, t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'x':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, tptr->x_fmt, t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'y':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _yconv(t->tm_year, TM_YEAR_BASE, 0, 1,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'Y':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _yconv(t->tm_year, TM_YEAR_BASE, 1, 1,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'Z':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (t->tm_isdst >= 0)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt = _add(tzname[t->tm_isdst != 0],
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                        pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * C99 says that %Z must be replaced by the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * empty string if the time zone is not
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * determinable.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case 'z':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                int     diff;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                char const *    sign;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (t->tm_isdst < 0)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * C99 says that the UTC offset must
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * be computed by looking only at
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * tm_isdst. This requirement is
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * incorrect, since it means the code
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * must rely on magic (in this case
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * altzone and timezone), and the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * magic might not have the correct
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * offset. Doing things correctly is
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * tricky and requires disobeying C99;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * see GNU C strftime for details.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * For now, punt and conform to the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * standard, even though it's incorrect.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 *
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * C99 says that %z must be replaced by the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * empty string if the time zone is not
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * determinable, so output nothing if the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 * appropriate variables are not available.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                 */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (t->tm_isdst == 0)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    diff = -timezone;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                else
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    diff = -altzone;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (diff < 0) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    sign = "-";
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    diff = -diff;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                } else
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    sign = "+";
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _add(sign, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                diff /= SECSPERMIN;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                diff = (diff / MINSPERHOUR) * 100 +
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    (diff % MINSPERHOUR);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                pt = _conv(diff, PADDING(PAD_FMT_YEAR),
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case '+':
2d08521bd15501c8370ba2153b9cca4f094979d0Garrett D'Amore                pt = _fmt(loc, tptr->date_fmt, t, pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                continue;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case '-':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (PadIndex != PAD_DEFAULT)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                PadIndex = PAD_LESS;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                goto label;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case '_':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (PadIndex != PAD_DEFAULT)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                PadIndex = PAD_SPACE;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                goto label;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case '0':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                if (PadIndex != PAD_DEFAULT)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                    break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                PadIndex = PAD_ZERO;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                goto label;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            case '%':
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            /*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore             * X311J/88-090 (4.12.3.5): if conversion char is
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore             * undefined, behavior is undefined. Print out the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore             * character itself as printf(3) also does.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore             */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            default:
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore                break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        if (pt == ptlim)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            break;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        *pt++ = *format;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    return (pt);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore}
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore_conv(const int n, const char *format, char *const pt,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    const char *const ptlim)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore{
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    char    buf[12];
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    (void) sprintf(buf, format, n);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    return (_add(buf, pt, ptlim));
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore}
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore_add(const char *str, char *pt, const char *const ptlim)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore{
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    while (pt < ptlim && (*pt = *str++) != '\0')
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        ++pt;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    return (pt);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore}
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore/*
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * POSIX and the C Standard are unclear or inconsistent about
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * what %C and %y do if the year is negative or exceeds 9999.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * Use the convention that %C concatenated with %y yields the
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * same output as %Y, and that %Y contains at least 4 bytes,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore * with more only if necessary.
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore */
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amorestatic char *
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore_yconv(const int a, const int b, const int convert_top, const int convert_yy,
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    char *pt, const char * const ptlim)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore{
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    register int    lead;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    register int    trail;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore#define DIVISOR 100
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    trail = a % DIVISOR + b % DIVISOR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    lead = a / DIVISOR + b / DIVISOR + trail / DIVISOR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    trail %= DIVISOR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    if (trail < 0 && lead > 0) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        trail += DIVISOR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        --lead;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    } else if (lead < 0 && trail > 0) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        trail -= DIVISOR;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        ++lead;
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    if (convert_top) {
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        if (lead == 0 && trail < 0)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore            pt = _add("-0", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        else    pt = _conv(lead, "%02d", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    }
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    if (convert_yy)
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore        pt = _conv(((trail < 0) ? -trail : trail), "%02d", pt, ptlim);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore    return (pt);
4297a3b0d0a35d80f86fff155e288e885a100e6dGarrett D'Amore}