Import BSDDB 4.7.25 (as of svn r89086)

os_brew/localtime.c

@@ -0,0 +1,78 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 2006,2008 Oracle.  All rights reserved.
+ *
+ * $Id: localtime.c 63573 2008-05-23 21:43:21Z trent.nelson $
+ */
+
+#include "db_config.h"
+
+#include "db_int.h"
+
+/*
+ * localtime --
+ *
+ * PUBLIC: #ifndef HAVE_LOCALTIME
+ * PUBLIC: struct tm *localtime __P((const time_t *));
+ * PUBLIC: #endif
+ */
+struct tm *
+localtime(tod)
+	const time_t *tod;
+{
+	JulianType jt;
+	boolean is_ds;					/* Daylight savings. */
+	time_t tt;
+	int increment;
+
+	/*
+	 * Berkeley DB uses POSIX time values internally, convert to a BREW
+	 * time value.
+	 */
+	is_ds = 0;
+	tt = *tod - BREW_EPOCH_OFFSET + LOCALTIMEOFFSET(&is_ds);
+
+	GETJULIANDATE(tt, &jt);
+
+	DB_GLOBAL(ltm).tm_sec = jt.wSecond;	/* seconds (0 - 60) */
+	DB_GLOBAL(ltm).tm_min = jt.wMinute;	/* minutes (0 - 59) */
+	DB_GLOBAL(ltm).tm_hour = jt.wHour;	/* hours (0 - 23) */
+	DB_GLOBAL(ltm).tm_mday = jt.wDay;	/* day of month (1 - 31) */
+	DB_GLOBAL(ltm).tm_mon = jt.wMonth - 1;	/* month of year (0 - 11) */
+						/* year - 1900 */
+	DB_GLOBAL(ltm).tm_year = jt.wYear - 1900;
+						/* day of week (Sunday = 0) */
+	DB_GLOBAL(ltm).tm_wday = (jt.wWeekDay + 1) % 7;
+						/* day of year (0 - 365) */
+	switch (DB_GLOBAL(ltm).tm_mon) {
+	default:
+	case  0: increment =   0; break;
+	case  1: increment =  31; break;
+	case  2: increment =  59; break;	/* Feb = 28 */
+	case  3: increment =  90; break;
+	case  4: increment = 120; break;
+	case  5: increment = 151; break;
+	case  6: increment = 181; break;
+	case  7: increment = 212; break;
+	case  8: increment = 243; break;
+	case  9: increment = 273; break;
+	case 10: increment = 304; break;
+	case 11: increment = 334; break;
+	}
+	DB_GLOBAL(ltm).tm_yday = increment + DB_GLOBAL(ltm).tm_mday - 1;
+
+	if (DB_GLOBAL(ltm).tm_mon > 1 &&	/* +1 leap years after Feb. */
+	    jt.wYear % 4 == 0 && (jt.wYear % 100 != 0 || jt.wYear % 400 == 0))
+		DB_GLOBAL(ltm).tm_yday += 1;
+
+	DB_GLOBAL(ltm).tm_isdst = is_ds;	/* daylight savings time */
+
+	/*
+	 * !!!
+	 * This routine is not thread-safe.  Berkeley DB should convert
+	 * to using localtime_r() where it's available, and this routine
+	 * should be re-written in the form of localtime_r().
+	 */
+	return (&DB_GLOBAL(ltm));
+}