20060303

1 files changed, 79 insertions, 0 deletions

diff --git a/utils/libmach/swap.c b/utils/libmach/swap.c
new file mode 100644
index 00000000..3ca9cf27
--- /dev/null
+++ b/utils/libmach/swap.c
@@ -0,0 +1,79 @@
+#include <lib9.h>
+
+/*
+ * big-endian short
+ */
+ushort
+beswab(ushort s)
+{
+	uchar *p;
+
+	p = (uchar*)&s;
+	return (p[0]<<8) | p[1];
+}
+
+/*
+ * big-endian long
+ */
+long
+beswal(long l)
+{
+	uchar *p;
+
+	p = (uchar*)&l;
+	return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
+}
+
+/*
+ * big-endian vlong
+ */
+vlong
+beswav(vlong v)
+{
+	uchar *p;
+
+	p = (uchar*)&v;
+	return ((vlong)p[0]<<56) | ((vlong)p[1]<<48) | ((vlong)p[2]<<40)
+				 | ((vlong)p[3]<<32) | ((vlong)p[4]<<24)
+				 | ((vlong)p[5]<<16) | ((vlong)p[6]<<8)
+				 | (vlong)p[7];
+}
+
+/*
+ * little-endian short
+ */
+ushort
+leswab(ushort s)
+{
+	uchar *p;
+
+	p = (uchar*)&s;
+	return (p[1]<<8) | p[0];
+}
+
+/*
+ * little-endian long
+ */
+long
+leswal(long l)
+{
+	uchar *p;
+
+	p = (uchar*)&l;
+	return (p[3]<<24) | (p[2]<<16) | (p[1]<<8) | p[0];
+}
+
+/*
+ * little-endian vlong
+ */
+vlong
+leswav(vlong v)
+{
+	uchar *p;
+
+	p = (uchar*)&v;
+	return ((vlong)p[7]<<56) | ((vlong)p[6]<<48) | ((vlong)p[5]<<40)
+				 | ((vlong)p[4]<<32) | ((vlong)p[3]<<24)
+				 | ((vlong)p[2]<<16) | ((vlong)p[1]<<8)
+				 | (vlong)p[0];
+}