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-rw-r--r--libc/misc/Makefile2
-rw-r--r--libc/misc/time/Makefile3
-rw-r--r--libc/misc/time/strftime.c398
3 files changed, 401 insertions, 2 deletions
diff --git a/libc/misc/Makefile b/libc/misc/Makefile
index 9907f2d99..7ff8da188 100644
--- a/libc/misc/Makefile
+++ b/libc/misc/Makefile
@@ -35,7 +35,7 @@ tags:
ctags -R
clean: subdirs_clean
- rm -f libc.a
+ rm -f *.[oa] *~ core
subdirs: $(patsubst %, _dir_%, $(DIRS))
subdirs_clean: $(patsubst %, _dirclean_%, $(DIRS))
diff --git a/libc/misc/time/Makefile b/libc/misc/time/Makefile
index 76adb2e2f..0d24f43e4 100644
--- a/libc/misc/time/Makefile
+++ b/libc/misc/time/Makefile
@@ -25,7 +25,8 @@ include $(TOPDIR)Rules.mak
LIBC=$(TOPDIR)libc.a
CSRC=localtime.c gmtime.c asctime.c ctime.c asc_conv.c tm_conv.c mktime.c \
- localtime_r.c gmtime_r.c asctime_r.c ctime_r.c utimes.c adjtime.c
+ localtime_r.c gmtime_r.c asctime_r.c ctime_r.c utimes.c adjtime.c \
+ strftime.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
OBJS=$(COBJS)
diff --git a/libc/misc/time/strftime.c b/libc/misc/time/strftime.c
new file mode 100644
index 000000000..8529446eb
--- /dev/null
+++ b/libc/misc/time/strftime.c
@@ -0,0 +1,398 @@
+/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <sys/types.h> /* Some systems define `time_t' here. */
+#include <sys/time.h>
+#include <time.h>
+#include <ctype.h>
+#include <limits.h>
+
+static unsigned int week (const struct tm *const, int, int);
+
+#define add(n, f) \
+ do \
+ { \
+ i += (n); \
+ if (i >= maxsize) \
+ return 0; \
+ else \
+ if (p) \
+ { \
+ f; \
+ p += (n); \
+ } \
+ } while (0)
+#define cpy(n, s) add((n), memcpy((void *) p, (void *) (s), (n)))
+
+#ifdef _LIBC
+#define fmt(n, args) add((n), if (sprintf args != (n)) return 0)
+#else
+#define fmt(n, args) add((n), sprintf args; if (strlen (p) != (n)) return 0)
+#endif
+
+
+
+/* Return the week in the year specified by TP,
+ with weeks starting on STARTING_DAY. */
+static unsigned int week(const struct tm *const tp , int starting_day , int max_preceding )
+{
+ int wday, dl, base;
+
+ wday = tp->tm_wday - starting_day;
+ if (wday < 0)
+ wday += 7;
+
+ /* Set DL to the day in the year of the first day of the week
+ containing the day specified in TP. */
+ dl = tp->tm_yday - wday;
+
+ /* For the computation following ISO 8601:1988 we set the number of
+ the week containing January 1st to 1 if this week has more than
+ MAX_PRECEDING days in the new year. For ISO 8601 this number is
+ 3, for the other representation it is 7 (i.e., not to be
+ fulfilled). */
+ base = ((dl + 7) % 7) > max_preceding ? 1 : 0;
+
+ /* If DL is negative we compute the result as 0 unless we have to
+ compute it according ISO 8601. In this case we have to return 53
+ or 1 if the week containing January 1st has less than 4 days in
+ the new year or not. If DL is not negative we calculate the
+ number of complete weeks for our week (DL / 7) plus 1 (because
+ only for DL < 0 we are in week 0/53 and plus the number of the
+ first week computed in the last step. */
+ return dl < 0 ? (dl < -max_preceding ? 53 : base)
+ : base + 1 + dl / 7;
+}
+
+#ifndef _NL_CURRENT
+static char const weekday_name[][10] =
+ {
+ "Sunday", "Monday", "Tuesday", "Wednesday",
+ "Thursday", "Friday", "Saturday"
+ };
+static char const month_name[][10] =
+ {
+ "January", "February", "March", "April", "May", "June",
+ "July", "August", "September", "October", "November", "December"
+ };
+#endif
+
+/* Write information from TP into S according to the format
+ string FORMAT, writing no more that MAXSIZE characters
+ (including the terminating '\0') and returning number of
+ characters written. If S is NULL, nothing will be written
+ anywhere, so to determine how many characters would be
+ written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */
+size_t strftime( char *s , size_t maxsize , const char *format , register const struct tm *tp)
+{
+ int hour12 = tp->tm_hour;
+#ifdef _NL_CURRENT
+ const char *const a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday);
+ const char *const f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday);
+ const char *const a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon);
+ const char *const f_month = _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon);
+ const char *const ampm = _NL_CURRENT (LC_TIME,
+ hour12 > 11 ? PM_STR : AM_STR);
+ size_t aw_len = strlen(a_wkday);
+ size_t am_len = strlen(a_month);
+ size_t ap_len = strlen (ampm);
+#else
+ const char *const f_wkday = weekday_name[tp->tm_wday];
+ const char *const f_month = month_name[tp->tm_mon];
+ const char *const a_wkday = f_wkday;
+ const char *const a_month = f_month;
+ const char *const ampm = "AMPM" + 2 * (hour12 > 11);
+ size_t aw_len = 3;
+ size_t am_len = 3;
+ size_t ap_len = 2;
+#endif
+ size_t wkday_len = strlen(f_wkday);
+ size_t month_len = strlen(f_month);
+ const unsigned int y_week0 = week (tp, 0, 7);
+ const unsigned int y_week1 = week (tp, 1, 7);
+ const unsigned int y_week2 = week (tp, 1, 3);
+ const char *zone;
+ size_t zonelen;
+ register size_t i = 0;
+ register char *p = s;
+ register const char *f;
+ char number_fmt[5];
+
+ /* Initialize the buffer we will use for the sprintf format for numbers. */
+ number_fmt[0] = '%';
+
+ zone = 0;
+#if HAVE_TM_ZONE
+ zone = (const char *) tp->tm_zone;
+#endif
+#if HAVE_TZNAME
+ if (!(zone && *zone) && tp->tm_isdst >= 0)
+ zone = tzname[tp->tm_isdst];
+#endif
+ if (!(zone && *zone))
+ zone = "???";
+
+ zonelen = strlen (zone);
+
+ if (hour12 > 12)
+ hour12 -= 12;
+ else
+ if (hour12 == 0) hour12 = 12;
+
+ for (f = format; *f != '\0'; ++f)
+ {
+ enum { pad_zero, pad_space, pad_none } pad; /* Padding for number. */
+ unsigned int maxdigits; /* Max digits for numeric format. */
+ unsigned int number_value; /* Numeric value to be printed. */
+ const char *subfmt;
+
+#if HAVE_MBLEN
+ if (!isascii(*f))
+ {
+ /* Non-ASCII, may be a multibyte. */
+ int len = mblen(f, strlen(f));
+ if (len > 0)
+ {
+ cpy(len, f);
+ continue;
+ }
+ }
+#endif
+
+ if (*f != '%')
+ {
+ add(1, *p = *f);
+ continue;
+ }
+
+ /* Check for flags that can modify a number format. */
+ ++f;
+ switch (*f)
+ {
+ case '_':
+ pad = pad_space;
+ ++f;
+ break;
+ case '-':
+ pad = pad_none;
+ ++f;
+ break;
+ default:
+ pad = pad_zero;
+ break;
+ }
+
+ /* Now do the specified format. */
+ switch (*f)
+ {
+ case '\0':
+ case '%':
+ add(1, *p = *f);
+ break;
+
+ case 'a':
+ cpy(aw_len, a_wkday);
+ break;
+
+ case 'A':
+ cpy(wkday_len, f_wkday);
+ break;
+
+ case 'b':
+ case 'h': /* GNU extension. */
+ cpy(am_len, a_month);
+ break;
+
+ case 'B':
+ cpy(month_len, f_month);
+ break;
+
+ case 'c':
+#ifdef _NL_CURRENT
+ subfmt = _NL_CURRENT (LC_TIME, D_T_FMT);
+#else
+ subfmt = "%a %b %d %H:%M:%S %Z %Y";
+#endif
+ subformat:
+ {
+ size_t len = strftime (p, maxsize - i, subfmt, tp);
+ if (len == 0 && *subfmt)
+ return 0;
+ add(len, );
+ }
+ break;
+
+#define DO_NUMBER(digits, value) \
+ maxdigits = digits; number_value = value; goto do_number
+#define DO_NUMBER_NOPAD(digits, value) \
+ maxdigits = digits; number_value = value; goto do_number_nopad
+
+ case 'C':
+ DO_NUMBER (2, (1900 + tp->tm_year) / 100);
+
+ case 'x':
+#ifdef _NL_CURRENT
+ subfmt = _NL_CURRENT (LC_TIME, D_FMT);
+ goto subformat;
+#endif
+ /* Fall through. */
+ case 'D': /* GNU extension. */
+ subfmt = "%m/%d/%y";
+ goto subformat;
+
+ case 'd':
+ DO_NUMBER (2, tp->tm_mday);
+
+ case 'e': /* GNU extension: %d, but blank-padded. */
+#if 0
+ DO_NUMBER_NOPAD (2, tp->tm_mday);
+#else
+ DO_NUMBER (2, tp->tm_mday);
+#endif
+
+ /* All numeric formats set MAXDIGITS and NUMBER_VALUE and then
+ jump to one of these two labels. */
+
+ do_number_nopad:
+ /* Force `-' flag. */
+ pad = pad_none;
+
+ do_number:
+ {
+ /* Format the number according to the PAD flag. */
+
+ register char *nf = &number_fmt[1];
+ int printed;
+
+ switch (pad)
+ {
+ case pad_zero:
+ *nf++ = '0';
+ case pad_space:
+ *nf++ = '0' + maxdigits;
+ case pad_none:
+ *nf++ = 'u';
+ *nf = '\0';
+ }
+
+#ifdef _LIBC
+ if (i + maxdigits >= maxsize)
+ return 0;
+ printed = sprintf (p, number_fmt, number_value);
+ i += printed;
+ p += printed;
+#else
+ add (maxdigits, sprintf (p, number_fmt, number_value);
+ printed = strlen (p));
+#endif
+
+ break;
+ }
+
+
+ case 'H':
+ DO_NUMBER (2, tp->tm_hour);
+
+ case 'I':
+ DO_NUMBER (2, hour12);
+
+ case 'k': /* GNU extension. */
+ DO_NUMBER_NOPAD (2, tp->tm_hour);
+
+ case 'l': /* GNU extension. */
+ DO_NUMBER_NOPAD (2, hour12);
+
+ case 'j':
+ DO_NUMBER (3, 1 + tp->tm_yday);
+
+ case 'M':
+ DO_NUMBER (2, tp->tm_min);
+
+ case 'm':
+ DO_NUMBER (2, tp->tm_mon + 1);
+
+ case 'n': /* GNU extension. */
+ add (1, *p = '\n');
+ break;
+
+ case 'p':
+ cpy(ap_len, ampm);
+ break;
+
+ case 'R': /* GNU extension. */
+ subfmt = "%H:%M";
+ goto subformat;
+
+ case 'r': /* GNU extension. */
+ subfmt = "%I:%M:%S %p";
+ goto subformat;
+
+ case 'S':
+ DO_NUMBER (2, tp->tm_sec);
+
+ case 'X':
+#ifdef _NL_CURRENT
+ subfmt = _NL_CURRENT (LC_TIME, T_FMT);
+ goto subformat;
+#endif
+ /* Fall through. */
+ case 'T': /* GNU extenstion. */
+ subfmt = "%H:%M:%S";
+ goto subformat;
+
+ case 't': /* GNU extenstion. */
+ add (1, *p = '\t');
+ break;
+
+ case 'U':
+ DO_NUMBER (2, y_week0);
+
+ case 'V':
+ DO_NUMBER (2, y_week2);
+
+ case 'W':
+ DO_NUMBER (2, y_week1);
+
+ case 'w':
+ DO_NUMBER (1, tp->tm_wday);
+
+ case 'Y':
+ DO_NUMBER (4, 1900 + tp->tm_year);
+
+ case 'y':
+ DO_NUMBER (2, tp->tm_year % 100);
+
+ case 'Z':
+ cpy(zonelen, zone);
+ break;
+
+ default:
+ /* Bad format. */
+ break;
+ }
+ }
+
+ if (p)
+ *p = '\0';
+ return i;
+}
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