Libc-498.tar.gz

[apple/libc.git] / stdtime / time32-fbsd.c

diff --git a/stdtime/time32-fbsd.c b/stdtime/time32-fbsd.c
new file mode 100644 (file)
index 0000000..5085dd7
--- /dev/null
+++ b/stdtime/time32-fbsd.c
@@ -0,0 +1,100 @@
+/*-
+ * Copyright (c) 2001 FreeBSD Inc.
+ * All rights reserved.
+ *
+ * These routines are for converting time_t to fixed-bit representations
+ * for use in protocols or storage.  When converting time to a larger
+ * representation of time_t these routines are expected to assume temporal
+ * locality and use the 50-year rule to properly set the msb bits.  XXX
+ *
+ * Redistribution and use under the terms of the COPYRIGHT file at the
+ * base of the source tree.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/lib/libc/stdtime/time32.c,v 1.5 2002/06/17 01:42:29 wollman Exp $");
+
+#include <sys/types.h>
+#include <timeconv.h>
+
+/*
+ * Convert a 32 bit representation of time_t into time_t.  XXX needs to
+ * implement the 50-year rule to handle post-2038 conversions.
+ */
+time_t
+_time32_to_time(__int32_t t32)
+{
+    return((time_t)t32);
+}
+
+/*
+ * Convert time_t to a 32 bit representation.  If time_t is 64 bits we can
+ * simply chop it down.   The resulting 32 bit representation can be 
+ * converted back to a temporally local 64 bit time_t using time32_to_time.
+ */
+__int32_t
+_time_to_time32(time_t t)
+{
+    return((__int32_t)t);
+}
+
+/*
+ * Convert a 64 bit representation of time_t into time_t.  If time_t is
+ * represented as 32 bits we can simply chop it and not support times
+ * past 2038.
+ */
+time_t
+_time64_to_time(__int64_t t64)
+{
+    return((time_t)t64);
+}
+
+/*
+ * Convert time_t to a 64 bit representation.  If time_t is represented
+ * as 32 bits we simply sign-extend and do not support times past 2038.
+ */
+__int64_t
+_time_to_time64(time_t t)
+{
+    return((__int64_t)t);
+}
+
+/*
+ * Convert to/from 'long'.  Depending on the sizeof(long) this may or 
+ * may not require using the 50-year rule.
+ */
+long
+_time_to_long(time_t t)
+{
+    if (sizeof(long) == sizeof(__int64_t))
+       return(_time_to_time64(t));
+    return((long)t);
+}
+
+time_t
+_long_to_time(long tlong)
+{
+    if (sizeof(long) == sizeof(__int32_t))
+       return(_time32_to_time(tlong));
+    return((time_t)tlong);
+}
+
+/*
+ * Convert to/from 'int'.  Depending on the sizeof(int) this may or 
+ * may not require using the 50-year rule.
+ */
+int
+_time_to_int(time_t t)
+{
+    if (sizeof(int) == sizeof(__int64_t))
+       return(_time_to_time64(t));
+    return((int)t);
+}
+
+time_t
+_int_to_time(int tint)
+{
+    if (sizeof(int) == sizeof(__int32_t))
+       return(_time32_to_time(tint));
+    return((time_t)tint);
+}