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-rw-r--r--lib/libc/stdtime/strftime.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/lib/libc/stdtime/strftime.c b/lib/libc/stdtime/strftime.c
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+++ b/lib/libc/stdtime/strftime.c
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+/*
+ * 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.
+ */
+
+#ifdef LIBC_RCS
+static const char rcsid[] =
+ "$Id$";
+#endif
+
+#ifndef lint
+#ifndef NOID
+static const char elsieid[] = "@(#)strftime.c 7.38";
+/*
+** 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"
+
+#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 <sys/stat.h>
+#include "setlocale.h"
+
+struct lc_time_T {
+ const char * mon[12];
+ const char * month[12];
+ const char * wday[7];
+ const char * weekday[7];
+ const char * X_fmt;
+ const char * x_fmt;
+ const char * c_fmt;
+ const char * am;
+ const char * pm;
+ const char * date_fmt;
+};
+
+static struct lc_time_T localebuf;
+static int using_locale;
+
+#define Locale (using_locale ? &localebuf : &C_time_locale)
+
+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
+ ** Since the C language standard calls for
+ ** "date, using locale's date format," anything goes.
+ ** Using just numbers (as here) makes Quakers happier;
+ ** it's also compatible with SVR4.
+ */
+ "%m/%d/%y",
+
+ /*
+ ** c_fmt (ctime-compatible)
+ ** Note that
+ ** "%a %b %d %H:%M:%S %Y"
+ ** is used by Solaris 2.3.
+ */
+ "%a %b %e %X %Y",
+
+ /* am */
+ "AM",
+
+ /* pm */
+ "PM",
+
+ /* date_fmt */
+ "%a %b %e %X %Z %Y"
+};
+
+static char * _add P((const char *, char *, const char *));
+static char * _conv P((int, const char *, char *, const char *));
+static char * _fmt P((const char *, const struct tm *, char *, const char *));
+static char * _secs P((const struct tm *, char *, const char *));
+
+size_t strftime P((char *, size_t, const char *, const struct tm *));
+
+extern char * tzname[];
+
+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;
+
+ tzset();
+ p = _fmt(((format == NULL) ? "%c" : format), t, s, s + maxsize);
+ if (p == s + maxsize)
+ return 0;
+ *p = '\0';
+ return p - s;
+}
+
+static char *
+_fmt(format, t, pt, ptlim)
+ const char *format;
+ const struct tm *const t;
+ char *pt;
+ const char *const ptlim;
+{
+ for ( ; *format; ++format) {
+ if (*format == '%') {
+label:
+ switch (*++format) {
+ case '\0':
+ --format;
+ break;
+ case 'A':
+ pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
+ "?" : Locale->weekday[t->tm_wday],
+ pt, ptlim);
+ continue;
+ case 'a':
+ pt = _add((t->tm_wday < 0 || t->tm_wday > 6) ?
+ "?" : Locale->wday[t->tm_wday],
+ pt, ptlim);
+ continue;
+ case 'B':
+ pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ?
+ "?" : Locale->month[t->tm_mon],
+ pt, ptlim);
+ continue;
+ case 'b':
+ case 'h':
+ pt = _add((t->tm_mon < 0 || t->tm_mon > 11) ?
+ "?" : 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, 5/24/93)
+ */
+ pt = _conv((t->tm_year + TM_YEAR_BASE) / 100,
+ "%02d", pt, ptlim);
+ continue;
+ case 'c':
+ pt = _fmt(Locale->c_fmt, t, pt, ptlim);
+ continue;
+ case 'D':
+ pt = _fmt("%m/%d/%y", t, pt, ptlim);
+ continue;
+ case 'd':
+ pt = _conv(t->tm_mday, "%02d", pt, ptlim);
+ continue;
+ case 'E':
+ case 'O':
+ /*
+ ** POSIX locale extensions, a la
+ ** Arnold Robbins' strftime version 3.0.
+ ** The sequences
+ ** %Ec %EC %Ex %Ey %EY
+ ** %Od %oe %OH %OI %Om %OM
+ ** %OS %Ou %OU %OV %Ow %OW %Oy
+ ** are supposed to provide alternate
+ ** representations.
+ ** (ado, 5/24/93)
+ */
+ goto label;
+ case 'e':
+ pt = _conv(t->tm_mday, "%2d", pt, ptlim);
+ continue;
+ case 'H':
+ pt = _conv(t->tm_hour, "%02d", pt, ptlim);
+ continue;
+ case 'I':
+ pt = _conv((t->tm_hour % 12) ?
+ (t->tm_hour % 12) : 12,
+ "%02d", pt, ptlim);
+ continue;
+ case 'j':
+ pt = _conv(t->tm_yday + 1, "%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, 5/24/93)
+ */
+ pt = _conv(t->tm_hour, "%2d", pt, ptlim);
+ continue;
+#ifdef KITCHEN_SINK
+ case 'K':
+ /*
+ ** After all this time, still unclaimed!
+ */
+ pt = _add("kitchen sink", pt, ptlim);
+ continue;
+#endif /* defined KITCHEN_SINK */
+ case 'l':
+ /*
+ ** This used to be...
+ ** _conv(t->tm_hour, 2, ' ');
+ ** ...and has been changed to the below to
+ ** match SunOS 4.1.1 and Arnold Robbin's
+ ** strftime version 3.0. That is, "%k" and
+ ** "%l" have been swapped.
+ ** (ado, 5/24/93)
+ */
+ pt = _conv((t->tm_hour % 12) ?
+ (t->tm_hour % 12) : 12,
+ "%2d", pt, ptlim);
+ continue;
+ case 'M':
+ pt = _conv(t->tm_min, "%02d", pt, ptlim);
+ continue;
+ case 'm':
+ pt = _conv(t->tm_mon + 1, "%02d", pt, ptlim);
+ continue;
+ case 'n':
+ pt = _add("\n", pt, ptlim);
+ continue;
+ case 'p':
+ pt = _add((t->tm_hour >= 12) ?
+ Locale->pm :
+ Locale->am,
+ pt, ptlim);
+ continue;
+ case 'R':
+ pt = _fmt("%H:%M", t, pt, ptlim);
+ continue;
+ case 'r':
+ pt = _fmt("%I:%M:%S %p", t, pt, ptlim);
+ continue;
+ case 'S':
+ pt = _conv(t->tm_sec, "%02d", pt, ptlim);
+ continue;
+ case 's':
+ pt = _secs(t, pt, ptlim);
+ continue;
+ case 'T':
+ pt = _fmt("%H:%M:%S", t, pt, ptlim);
+ continue;
+ case 't':
+ pt = _add("\t", pt, ptlim);
+ continue;
+ case 'U':
+ pt = _conv((t->tm_yday + 7 - t->tm_wday) / 7,
+ "%02d", pt, ptlim);
+ continue;
+ case 'u':
+ /*
+ ** From Arnold Robbins' strftime version 3.0:
+ ** "ISO 8601: Weekday as a decimal number
+ ** [1 (Monday) - 7]"
+ ** (ado, 5/24/93)
+ */
+ pt = _conv((t->tm_wday == 0) ? 7 : t->tm_wday,
+ "%d", pt, ptlim);
+ continue;
+ case 'V':
+ /*
+ ** 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). The method for
+ ** determining the week number is as specified
+ ** by ISO 8601 (to wit: if the week containing
+ ** January 1 has four or more days in the new
+ ** year, then it is week 1, otherwise it is
+ ** week 53 of the previous year and the next
+ ** week is week 1)."
+ ** (ado, 5/24/93)
+ */
+ /*
+ ** XXX--If January 1 falls on a Friday,
+ ** January 1-3 are part of week 53 of the
+ ** previous year. By analogy, if January
+ ** 1 falls on a Thursday, are December 29-31
+ ** of the PREVIOUS year part of week 1???
+ ** (ado 5/24/93)
+ */
+ /*
+ ** You are understood not to expect this.
+ */
+ {
+ int i;
+
+ i = (t->tm_yday + 10 - (t->tm_wday ?
+ (t->tm_wday - 1) : 6)) / 7;
+ if (i == 0) {
+ /*
+ ** What day of the week does
+ ** January 1 fall on?
+ */
+ i = t->tm_wday -
+ (t->tm_yday - 1);
+ /*
+ ** Fri Jan 1: 53
+ ** Sun Jan 1: 52
+ ** Sat Jan 1: 53 if previous
+ ** year a leap
+ ** year, else 52
+ */
+ if (i == TM_FRIDAY)
+ i = 53;
+ else if (i == TM_SUNDAY)
+ i = 52;
+ else i = isleap(t->tm_year +
+ TM_YEAR_BASE) ?
+ 53 : 52;
+#ifdef XPG4_1994_04_09
+ /*
+ ** As of 4/9/94, though,
+ ** XPG4 calls for 53
+ ** unconditionally.
+ */
+ i = 53;
+#endif /* defined XPG4_1994_04_09 */
+ }
+ pt = _conv(i, "%02d", pt, ptlim);
+ }
+ continue;
+ case 'v':
+ /*
+ ** From Arnold Robbins' strftime version 3.0:
+ ** "date as dd-bbb-YYYY"
+ ** (ado, 5/24/93)
+ */
+ pt = _fmt("%e-%b-%Y", t, pt, ptlim);
+ continue;
+ case 'W':
+ pt = _conv((t->tm_yday + 7 -
+ (t->tm_wday ?
+ (t->tm_wday - 1) : 6)) / 7,
+ "%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);
+ continue;
+ case 'x':
+ pt = _fmt(Locale->x_fmt, t, pt, ptlim);
+ continue;
+ case 'y':
+ pt = _conv((t->tm_year + TM_YEAR_BASE) % 100,
+ "%02d", pt, ptlim);
+ continue;
+ case 'Y':
+ pt = _conv(t->tm_year + TM_YEAR_BASE, "%04d",
+ pt, ptlim);
+ continue;
+ case 'Z':
+ if (t->tm_zone != NULL)
+ pt = _add(t->tm_zone, pt, ptlim);
+ else
+ if (t->tm_isdst == 0 || t->tm_isdst == 1) {
+ pt = _add(tzname[t->tm_isdst],
+ pt, ptlim);
+ } else pt = _add("?", pt, ptlim);
+ continue;
+ case '+':
+ pt = _fmt(Locale->date_fmt, t, pt, ptlim);
+ 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);
+}
+
+static char *
+_secs(t, pt, ptlim)
+ const struct tm *t;
+ char *pt;
+ const char *ptlim;
+{
+ char buf[INT_STRLEN_MAXIMUM(int) + 1];
+ register time_t s;
+ struct tm tmp;
+
+ /* Make a copy, mktime(3) modifies the tm struct. */
+ tmp = *t;
+ s = mktime(&tmp);
+ (void) sprintf(buf, "%ld", s);
+ return _add(buf, pt, ptlim);
+}
+
+static char *
+_add(str, pt, ptlim)
+ const char *str;
+ char *pt;
+ const char *const ptlim;
+{
+ while (pt < ptlim && (*pt = *str++) != '\0')
+ ++pt;
+ return pt;
+}
+
+int
+__time_load_locale(const char *name)
+{
+ static char * locale_buf;
+ static char locale_buf_C[] = "C";
+
+ int fd;
+ char * lbuf;
+ char * p;
+ const char ** ap;
+ const char * plim;
+ char filename[PATH_MAX];
+ struct stat st;
+ size_t namesize;
+ size_t bufsize;
+ int save_using_locale;
+
+ save_using_locale = using_locale;
+ using_locale = 0;
+
+ if (name == NULL)
+ goto no_locale;
+
+ if (!strcmp(name, "C") || !strcmp(name, "POSIX"))
+ return 0;
+
+ /*
+ ** 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;
+ using_locale = 1;
+ return 0;
+ }
+ /*
+ ** Slurp the locale file into the cache.
+ */
+ namesize = strlen(name) + 1;
+
+ if (!_PathLocale)
+ goto no_locale;
+ /* Range checking not needed, 'name' size is limited */
+ strcpy(filename, _PathLocale);
+ strcat(filename, "/");
+ strcat(filename, name);
+ strcat(filename, "/LC_TIME");
+ 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 || lbuf == locale_buf_C) ?
+ 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 reset_locale;
+ *ap = p;
+ while (*p != '\n')
+ ++p;
+ *p++ = '\0';
+ }
+ /*
+ ** Record the successful parse in the cache.
+ */
+ locale_buf = lbuf;
+
+ using_locale = 1;
+ return 0;
+
+reset_locale:
+ /*
+ * XXX - This may not be the correct thing to do in this case.
+ * setlocale() assumes that we left the old locale alone.
+ */
+ locale_buf = locale_buf_C;
+ localebuf = C_time_locale;
+ save_using_locale = 0;
+bad_lbuf:
+ free(lbuf);
+bad_locale:
+ (void) close(fd);
+no_locale:
+ using_locale = save_using_locale;
+ return -1;
+}
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