auto import from //depot/cupcake/@135843
diff --git a/libc/tzcode/strftime.c b/libc/tzcode/strftime.c
new file mode 100644
index 0000000..946c91c
--- /dev/null
+++ b/libc/tzcode/strftime.c
@@ -0,0 +1,872 @@
+#ifndef lint
+#ifndef NOID
+static char elsieid[] = "@(#)strftime.c 8.1";
+/*
+** Based on the UCB version with the ID appearing below.
+** This is ANSIish only when "multibyte character == plain character".
+*/
+#endif /* !defined NOID */
+#endif /* !defined lint */
+
+#include "private.h"
+
+/*
+** Copyright (c) 1989 The Regents of the University of California.
+** All rights reserved.
+**
+** Redistribution and use in source and binary forms are permitted
+** provided that the above copyright notice and this paragraph are
+** duplicated in all such forms and that any documentation,
+** advertising materials, and other materials related to such
+** distribution and use acknowledge that the software was developed
+** by the University of California, Berkeley. The name of the
+** University may not be used to endorse or promote products derived
+** from this software without specific prior written permission.
+** THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+** IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+*/
+
+#ifndef LIBC_SCCS
+#ifndef lint
+static const char sccsid[] = "@(#)strftime.c 5.4 (Berkeley) 3/14/89";
+#endif /* !defined lint */
+#endif /* !defined LIBC_SCCS */
+
+#include "tzfile.h"
+#include "fcntl.h"
+#include "locale.h"
+#include <ctype.h>
+
+struct lc_time_T {
+ const char * mon[MONSPERYEAR];
+ const char * month[MONSPERYEAR];
+ const char * wday[DAYSPERWEEK];
+ const char * weekday[DAYSPERWEEK];
+ const char * X_fmt;
+ const char * x_fmt;
+ const char * c_fmt;
+ const char * am;
+ const char * pm;
+ const char * date_fmt;
+};
+
+#ifdef LOCALE_HOME
+#include "sys/stat.h"
+static struct lc_time_T localebuf;
+static struct lc_time_T * _loc P((void));
+#define Locale _loc()
+#endif /* defined LOCALE_HOME */
+#ifndef LOCALE_HOME
+#define Locale (&C_time_locale)
+#endif /* !defined LOCALE_HOME */
+
+static const struct lc_time_T C_time_locale = {
+ {
+ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+ }, {
+ "January", "February", "March", "April", "May", "June",
+ "July", "August", "September", "October", "November", "December"
+ }, {
+ "Sun", "Mon", "Tue", "Wed",
+ "Thu", "Fri", "Sat"
+ }, {
+ "Sunday", "Monday", "Tuesday", "Wednesday",
+ "Thursday", "Friday", "Saturday"
+ },
+
+ /* X_fmt */
+ "%H:%M:%S",
+
+ /*
+ ** x_fmt
+ ** C99 requires this format.
+ ** Using just numbers (as here) makes Quakers happier;
+ ** it's also compatible with SVR4.
+ */
+ "%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.
+ */
+ "%a %b %e %T %Y",
+
+ /* am */
+ "AM",
+
+ /* pm */
+ "PM",
+
+ /* date_fmt */
+ "%a %b %e %H:%M:%S %Z %Y"
+};
+
+static char * _add P((const char *, char *, const char *, int));
+static char * _conv P((int, const char *, char *, const char *));
+static char * _fmt P((const char *, const struct tm *, char *, const char *,
+ int *));
+static char * _yconv P((int, int, int, int, char *, const char *, int));
+static char * getformat P((int, char *, char *, char *, char *));
+
+extern char * tzname[];
+
+#ifndef YEAR_2000_NAME
+#define YEAR_2000_NAME "CHECK_STRFTIME_FORMATS_FOR_TWO_DIGIT_YEARS"
+#endif /* !defined YEAR_2000_NAME */
+
+#define IN_NONE 0
+#define IN_SOME 1
+#define IN_THIS 2
+#define IN_ALL 3
+
+#define FORCE_LOWER_CASE 0x100
+
+size_t
+strftime(s, maxsize, format, t)
+char * const s;
+const size_t maxsize;
+const char * const format;
+const struct tm * const t;
+{
+ char * p;
+ int warn;
+
+ tzset();
+#ifdef LOCALE_HOME
+ localebuf.mon[0] = 0;
+#endif /* defined LOCALE_HOME */
+ warn = IN_NONE;
+ p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize, &warn);
+#ifndef NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU
+ if (warn != IN_NONE && getenv(YEAR_2000_NAME) != NULL) {
+ (void) fprintf(stderr, "\n");
+ if (format == NULL)
+ (void) fprintf(stderr, "NULL strftime format ");
+ else (void) fprintf(stderr, "strftime format \"%s\" ",
+ format);
+ (void) fprintf(stderr, "yields only two digits of years in ");
+ if (warn == IN_SOME)
+ (void) fprintf(stderr, "some locales");
+ else if (warn == IN_THIS)
+ (void) fprintf(stderr, "the current locale");
+ else (void) fprintf(stderr, "all locales");
+ (void) fprintf(stderr, "\n");
+ }
+#endif /* !defined NO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU */
+ if (p == s + maxsize)
+ return 0;
+ *p = '\0';
+ return p - s;
+}
+
+static char *getformat(int modifier, char *normal, char *underscore,
+ char *dash, char *zero) {
+ switch (modifier) {
+ case '_':
+ return underscore;
+
+ case '-':
+ return dash;
+
+ case '0':
+ return zero;
+ }
+
+ return normal;
+}
+
+static char *
+_fmt(format, t, pt, ptlim, warnp)
+const char * format;
+const struct tm * const t;
+char * pt;
+const char * const ptlim;
+int * warnp;
+{
+ for ( ; *format; ++format) {
+ if (*format == '%') {
+ int modifier = 0;
+label:
+ switch (*++format) {
+ case '\0':
+ --format;
+ break;
+ case 'A':
+ pt = _add((t->tm_wday < 0 ||
+ t->tm_wday >= DAYSPERWEEK) ?
+ "?" : Locale->weekday[t->tm_wday],
+ pt, ptlim, modifier);
+ continue;
+ case 'a':
+ pt = _add((t->tm_wday < 0 ||
+ t->tm_wday >= DAYSPERWEEK) ?
+ "?" : Locale->wday[t->tm_wday],
+ pt, ptlim, modifier);
+ continue;
+ case 'B':
+ pt = _add((t->tm_mon < 0 ||
+ t->tm_mon >= MONSPERYEAR) ?
+ "?" : Locale->month[t->tm_mon],
+ pt, ptlim, modifier);
+ continue;
+ case 'b':
+ case 'h':
+ pt = _add((t->tm_mon < 0 ||
+ t->tm_mon >= MONSPERYEAR) ?
+ "?" : Locale->mon[t->tm_mon],
+ pt, ptlim, modifier);
+ 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, modifier);
+ continue;
+ case 'c':
+ {
+ int warn2 = IN_SOME;
+
+ pt = _fmt(Locale->c_fmt, t, pt, ptlim, warnp);
+ if (warn2 == IN_ALL)
+ warn2 = IN_THIS;
+ if (warn2 > *warnp)
+ *warnp = warn2;
+ }
+ continue;
+ case 'D':
+ pt = _fmt("%m/%d/%y", t, pt, ptlim, warnp);
+ continue;
+ case 'd':
+ pt = _conv(t->tm_mday,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%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 '_':
+ case '-':
+ case '0':
+ case '^':
+ case '#':
+ modifier = *format;
+ goto label;
+ case 'e':
+ pt = _conv(t->tm_mday,
+ getformat(modifier, "%2d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 'F':
+ pt = _fmt("%Y-%m-%d", t, pt, ptlim, warnp);
+ continue;
+ case 'H':
+ pt = _conv(t->tm_hour,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 'I':
+ pt = _conv((t->tm_hour % 12) ?
+ (t->tm_hour % 12) : 12,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 'j':
+ pt = _conv(t->tm_yday + 1,
+ getformat(modifier, "%03d", "%3d", "%d", "%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,
+ getformat(modifier, "%2d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+#ifdef KITCHEN_SINK
+ case 'K':
+ /*
+ ** After all this time, still unclaimed!
+ */
+ pt = _add("kitchen sink", pt, ptlim, modifier);
+ continue;
+#endif /* defined KITCHEN_SINK */
+ case 'l':
+ /*
+ ** This used to be...
+ ** _conv(t->tm_hour, 2, ' ');
+ ** ...and has been changed to the below to
+ ** match SunOS 4.1.1 and Arnold Robbin's
+ ** strftime version 3.0. That is, "%k" and
+ ** "%l" have been swapped.
+ ** (ado, 1993-05-24)
+ */
+ pt = _conv((t->tm_hour % 12) ?
+ (t->tm_hour % 12) : 12,
+ getformat(modifier, "%2d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 'M':
+ pt = _conv(t->tm_min,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 'm':
+ pt = _conv(t->tm_mon + 1,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 'n':
+ pt = _add("\n", pt, ptlim, modifier);
+ continue;
+ case 'p':
+ pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
+ Locale->pm :
+ Locale->am,
+ pt, ptlim, modifier);
+ continue;
+ case 'P':
+ pt = _add((t->tm_hour >= (HOURSPERDAY / 2)) ?
+ Locale->pm :
+ Locale->am,
+ pt, ptlim, FORCE_LOWER_CASE);
+ continue;
+ case 'R':
+ pt = _fmt("%H:%M", t, pt, ptlim, warnp);
+ continue;
+ case 'r':
+ pt = _fmt("%I:%M:%S %p", t, pt, ptlim, warnp);
+ continue;
+ case 'S':
+ pt = _conv(t->tm_sec,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%02d"),
+ pt, ptlim);
+ continue;
+ case 's':
+ {
+ struct tm tm;
+ char buf[INT_STRLEN_MAXIMUM(
+ time_t) + 1];
+ time_t mkt;
+
+ tm = *t;
+ mkt = mktime(&tm);
+ if (TYPE_SIGNED(time_t))
+ (void) sprintf(buf, "%ld",
+ (long) mkt);
+ else (void) sprintf(buf, "%lu",
+ (unsigned long) mkt);
+ pt = _add(buf, pt, ptlim, modifier);
+ }
+ continue;
+ case 'T':
+ pt = _fmt("%H:%M:%S", t, pt, ptlim, warnp);
+ continue;
+ case 't':
+ pt = _add("\t", pt, ptlim, modifier);
+ continue;
+ case 'U':
+ pt = _conv((t->tm_yday + DAYSPERWEEK -
+ t->tm_wday) / DAYSPERWEEK,
+ getformat(modifier, "%02d",
+ "%2d", "%d", "%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, "%d", pt, ptlim);
+ continue;
+ case 'V': /* ISO 8601 week number */
+ case 'G': /* ISO 8601 year (four digits) */
+ case 'g': /* ISO 8601 year (two digits) */
+/*
+** From Arnold Robbins' strftime version 3.0: "the week number of the
+** year (the first Monday as the first day of week 1) as a decimal number
+** (01-53)."
+** (ado, 1993-05-24)
+**
+** From "http://www.ft.uni-erlangen.de/~mskuhn/iso-time.html" by Markus Kuhn:
+** "Week 01 of a year is per definition the first week which has the
+** Thursday in this year, which is equivalent to the week which contains
+** the fourth day of January. In other words, the first week of a new year
+** is the week which has the majority of its days in the new year. Week 01
+** might also contain days from the previous year and the week before week
+** 01 of a year is the last week (52 or 53) of the previous year even if
+** it contains days from the new year. A week starts with Monday (day 1)
+** and ends with Sunday (day 7). For example, the first week of the year
+** 1997 lasts from 1996-12-30 to 1997-01-05..."
+** (ado, 1996-01-02)
+*/
+ {
+ int year;
+ int base;
+ int yday;
+ int wday;
+ int w;
+
+ year = t->tm_year;
+ base = TM_YEAR_BASE;
+ yday = t->tm_yday;
+ wday = t->tm_wday;
+ for ( ; ; ) {
+ int len;
+ int bot;
+ int top;
+
+ len = isleap_sum(year, base) ?
+ DAYSPERLYEAR :
+ DAYSPERNYEAR;
+ /*
+ ** What yday (-3 ... 3) does
+ ** the ISO year begin on?
+ */
+ bot = ((yday + 11 - wday) %
+ DAYSPERWEEK) - 3;
+ /*
+ ** What yday does the NEXT
+ ** ISO year begin on?
+ */
+ top = bot -
+ (len % DAYSPERWEEK);
+ if (top < -3)
+ top += DAYSPERWEEK;
+ top += len;
+ if (yday >= top) {
+ ++base;
+ w = 1;
+ break;
+ }
+ if (yday >= bot) {
+ w = 1 + ((yday - bot) /
+ DAYSPERWEEK);
+ break;
+ }
+ --base;
+ yday += isleap_sum(year, base) ?
+ DAYSPERLYEAR :
+ DAYSPERNYEAR;
+ }
+#ifdef XPG4_1994_04_09
+ if ((w == 52 &&
+ t->tm_mon == TM_JANUARY) ||
+ (w == 1 &&
+ t->tm_mon == TM_DECEMBER))
+ w = 53;
+#endif /* defined XPG4_1994_04_09 */
+ if (*format == 'V')
+ pt = _conv(w,
+ 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);
+ 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);
+ 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, 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);
+ 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) sprintf(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;
+}
+
+#ifdef LOCALE_HOME
+static struct lc_time_T *
+_loc P((void))
+{
+ static const char locale_home[] = LOCALE_HOME;
+ static const char lc_time[] = "LC_TIME";
+ static char * locale_buf;
+
+ int fd;
+ int oldsun; /* "...ain't got nothin' to do..." */
+ char * lbuf;
+ char * name;
+ char * p;
+ const char ** ap;
+ const char * plim;
+ char filename[FILENAME_MAX];
+ struct stat st;
+ size_t namesize;
+ size_t bufsize;
+
+ /*
+ ** Use localebuf.mon[0] to signal whether locale is already set up.
+ */
+ if (localebuf.mon[0])
+ return &localebuf;
+ name = setlocale(LC_TIME, (char *) NULL);
+ if (name == NULL || *name == '\0')
+ goto no_locale;
+ /*
+ ** If the locale name is the same as our cache, use the cache.
+ */
+ lbuf = locale_buf;
+ if (lbuf != NULL && strcmp(name, lbuf) == 0) {
+ p = lbuf;
+ for (ap = (const char **) &localebuf;
+ ap < (const char **) (&localebuf + 1);
+ ++ap)
+ *ap = p += strlen(p) + 1;
+ return &localebuf;
+ }
+ /*
+ ** Slurp the locale file into the cache.
+ */
+ namesize = strlen(name) + 1;
+ if (sizeof filename <
+ ((sizeof locale_home) + namesize + (sizeof lc_time)))
+ goto no_locale;
+ oldsun = 0;
+ (void) sprintf(filename, "%s/%s/%s", locale_home, name, lc_time);
+ fd = open(filename, O_RDONLY);
+ if (fd < 0) {
+ /*
+ ** Old Sun systems have a different naming and data convention.
+ */
+ oldsun = 1;
+ (void) sprintf(filename, "%s/%s/%s", locale_home,
+ lc_time, name);
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ goto no_locale;
+ }
+ if (fstat(fd, &st) != 0)
+ goto bad_locale;
+ if (st.st_size <= 0)
+ goto bad_locale;
+ bufsize = namesize + st.st_size;
+ locale_buf = NULL;
+ lbuf = (lbuf == NULL) ? malloc(bufsize) : realloc(lbuf, bufsize);
+ if (lbuf == NULL)
+ goto bad_locale;
+ (void) strcpy(lbuf, name);
+ p = lbuf + namesize;
+ plim = p + st.st_size;
+ if (read(fd, p, (size_t) st.st_size) != st.st_size)
+ goto bad_lbuf;
+ if (close(fd) != 0)
+ goto bad_lbuf;
+ /*
+ ** Parse the locale file into localebuf.
+ */
+ if (plim[-1] != '\n')
+ goto bad_lbuf;
+ for (ap = (const char **) &localebuf;
+ ap < (const char **) (&localebuf + 1);
+ ++ap) {
+ if (p == plim)
+ goto bad_lbuf;
+ *ap = p;
+ while (*p != '\n')
+ ++p;
+ *p++ = '\0';
+ }
+ if (oldsun) {
+ /*
+ ** SunOS 4 used an obsolescent format; see localdtconv(3).
+ ** c_fmt had the ``short format for dates and times together''
+ ** (SunOS 4 date, "%a %b %e %T %Z %Y" in the C locale);
+ ** date_fmt had the ``long format for dates''
+ ** (SunOS 4 strftime %C, "%A, %B %e, %Y" in the C locale).
+ ** Discard the latter in favor of the former.
+ */
+ localebuf.date_fmt = localebuf.c_fmt;
+ }
+ /*
+ ** Record the successful parse in the cache.
+ */
+ locale_buf = lbuf;
+
+ return &localebuf;
+
+bad_lbuf:
+ free(lbuf);
+bad_locale:
+ (void) close(fd);
+no_locale:
+ localebuf = C_time_locale;
+ locale_buf = NULL;
+ return &localebuf;
+}
+#endif /* defined LOCALE_HOME */