created

2004-11-16 19:46:29 +00:00
parent 2655dc817e
commit 12acdc5dca
4 changed files with 123 additions and 1 deletions
@@ -0,0 +1,27 @@
+// Big-Endian systems save the most significant byte first. 
+// Sun and Motorola processors, IBM-370s and PDP-10s are big-endian.
+// for example, a 4 byte integer 67305985 is 0x04030201 in hexidecimal.
+// x[0] = 0x04
+// x[1] = 0x03
+// x[2] = 0x02
+// x[3] = 0x01
+
+// Little-Endian systems save the least significant byte first. 
+// The entire Intel x86 family, Vaxes, Alphas and PDP-11s are little-endian.
+// for example, a 4 byte integer 67305985 is 0x04030201 in hexidecimal.
+// x[0] = 0x01
+// x[1] = 0x02
+// x[2] = 0x03
+// x[3] = 0x04
+
+int big_endian(void)
+{
+    union {
+        long l;
+        char c[sizeof(long)];
+    } u;
+
+    u.l = 1;
+
+    return (u.c[sizeof(long) - 1] == 1);
+}