add directory gnu

2024-02-19 00:24:47 -05:00
parent 32616db5a4
commit a40f4cadb0
5086 changed files with 1860970 additions and 0 deletions
--- a/gnu/glibc/glibc-1.03/time/offtime.c
+++ b/gnu/glibc/glibc-1.03/time/offtime.c
@@ -0,0 +1,90 @@
+/* Copyright (C) 1991 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 <ansidecl.h>
+#include <time.h>
+
+
+/* How many days are in each month.  */
+CONST unsigned short int __mon_lengths[2][12] =
+  {
+    /* Normal years.  */
+    { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
+    /* Leap years.  */
+    { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+  };
+
+#define	SECS_PER_HOUR	(60 * 60)
+#define	SECS_PER_DAY	(SECS_PER_HOUR * 24)
+
+/* Returns the `struct tm' representation of *T,
+   offset OFFSET seconds east of UCT.	*/
+struct tm *
+DEFUN(__offtime, (t, offset), CONST time_t *t AND long int offset)
+{
+  static struct tm tbuf;
+  register long int days, rem;
+  register int y;
+  register CONST unsigned short int *ip;
+
+  if (t == NULL)
+    return NULL;
+
+  days = *t / SECS_PER_DAY;
+  rem = *t % SECS_PER_DAY;
+  rem += offset;
+  while (rem < 0)
+    {
+      rem += SECS_PER_DAY;
+      --days;
+    }
+  while (rem >= SECS_PER_DAY)
+    {
+      rem -= SECS_PER_DAY;
+      ++days;
+    }
+  tbuf.tm_hour = rem / SECS_PER_HOUR;
+  rem %= SECS_PER_HOUR;
+  tbuf.tm_min = rem / 60;
+  tbuf.tm_sec = rem % 60;
+  /* January 1, 1970 was a Thursday.  */
+  tbuf.tm_wday = (4 + days) % 7;
+  if (tbuf.tm_wday < 0)
+    tbuf.tm_wday += 7;
+  y = 1970;
+  while (days >= (rem = __isleap(y) ? 366 : 365))
+    {
+      ++y;
+      days -= rem;
+    }
+  while (days < 0)
+    {
+      --y;
+      days += __isleap(y) ? 366 : 365;
+    }
+  tbuf.tm_year = y - 1900;
+  tbuf.tm_yday = days;
+  ip = __mon_lengths[__isleap(y)];
+  for (y = 0; days >= ip[y]; ++y)
+    days -= ip[y];
+  tbuf.tm_mon = y;
+  tbuf.tm_mday = days + 1;
+  tbuf.tm_isdst = -1;
+
+  return &tbuf;
+}