19990502 sourceware import

libiberty/memcmp.c

@@ -0,0 +1,38 @@
+/* memcmp -- compare two memory regions.
+   This function is in the public domain.  */
+
+/*
+NAME
+	memcmp -- compare two memory regions
+
+SYNOPSIS
+	int memcmp (const void *from, const void *to, size_t count)
+
+DESCRIPTION
+	Compare two memory regions and return less than,
+	equal to, or greater than zero, according to lexicographical
+	ordering of the compared regions.
+*/
+
+#include <ansidecl.h>
+#ifdef __STDC__
+#include <stddef.h>
+#else
+#define size_t unsigned long
+#endif
+
+int
+DEFUN(memcmp, (str1, str2, count),
+      const PTR str1 AND const PTR str2 AND size_t count)
+{
+  register unsigned char *s1 = (unsigned char*)str1;
+  register unsigned char *s2 = (unsigned char*)str2;
+
+  while (count-- > 0)
+    {
+      if (*s1++ != *s2++)
+	  return s1[-1] < s2[-1] ? -1 : 1;
+    }
+  return 0;
+}
+