1 files changed, 65 insertions, 0 deletions
diff --git a/private/crt32/string/memcmp.c b/private/crt32/string/memcmp.c
new file mode 100644
index 000000000..478ecabab
--- /dev/null
+++ b/private/crt32/string/memcmp.c
@@ -0,0 +1,65 @@
+/***
+*memcmp.c - compare two blocks of memory
+*
+*	Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
+*
+*Purpose:
+*	defines memcmp() - compare two memory blocks lexically and
+*	find their order.
+*
+*Revision History:
+*	05-31-89   JCR	C version created.
+*	02-27-90   GJF	Fixed calling type, #include <cruntime.h>, fixed
+*			copyright.
+*	10-01-90   GJF	New-style function declarator. Also, rewrote expr. to
+*			avoid using cast as an lvalue.
+*	04-01-91   SRW	Add #pragma function for i386 _WIN32_ and _CRUISER_
+*			builds
+*	10-11-91   GJF	Bug fix! Comparison of final bytes must use unsigned
+*			chars.
+*
+*******************************************************************************/
+
+#include <cruntime.h>
+#include <string.h>
+
+#if	defined(_CRUISER_) || defined(i386)
+#pragma function(memcmp)
+#endif  /* ndef _CRUISER_ */
+
+/***
+*int memcmp(buf1, buf2, count) - compare memory for lexical order
+*
+*Purpose:
+*	Compares count bytes of memory starting at buf1 and buf2
+*	and find if equal or which one is first in lexical order.
+*
+*Entry:
+*	void *buf1, *buf2 - pointers to memory sections to compare
+*	size_t count - length of sections to compare
+*
+*Exit:
+*	returns < 0 if buf1 < buf2
+*	returns  0  if buf1 == buf2
+*	returns > 0 if buf1 > buf2
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+int _CALLTYPE1 memcmp (
+	const void * buf1,
+	const void * buf2,
+	size_t count
+	)
+{
+	if (!count)
+		return(0);
+
+	while ( --count && *(char *)buf1 == *(char *)buf2 ) {
+		buf1 = (char *)buf1 + 1;
+		buf2 = (char *)buf2 + 1;
+	}
+
+	return( *((unsigned char *)buf1) - *((unsigned char *)buf2) );
+}