From c6ef89664b8c0d7aa85bddd5c7014aa6df82cbe7 Mon Sep 17 00:00:00 2001
From: tcsullivan <tullivan99@gmail.com>
Date: Sat, 17 Nov 2018 13:02:57 -0500
Subject: added pdclib, removed sash

---
 src/pdclib/functions/string/memmove.c | 52 +++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 src/pdclib/functions/string/memmove.c

(limited to 'src/pdclib/functions/string/memmove.c')

diff --git a/src/pdclib/functions/string/memmove.c b/src/pdclib/functions/string/memmove.c
new file mode 100644
index 0000000..af89813
--- /dev/null
+++ b/src/pdclib/functions/string/memmove.c
@@ -0,0 +1,52 @@
+/* memmove( void *, const void *, size_t )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <string.h>
+
+#ifndef REGTEST
+
+void * memmove( void * s1, const void * s2, size_t n )
+{
+    char * dest = (char *) s1;
+    const char * src = (const char *) s2;
+    if ( dest <= src )
+    {
+        while ( n-- )
+        {
+            *dest++ = *src++;
+        }
+    }
+    else
+    {
+        src += n;
+        dest += n;
+        while ( n-- )
+        {
+            *--dest = *--src;
+        }
+    }
+    return s1;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    char s[] = "xxxxabcde";
+    TESTCASE( memmove( s, s + 4, 5 ) == s );
+    TESTCASE( s[0] == 'a' );
+    TESTCASE( s[4] == 'e' );
+    TESTCASE( s[5] == 'b' );
+    TESTCASE( memmove( s + 4, s, 5 ) == s + 4 );
+    TESTCASE( s[4] == 'a' );
+    return TEST_RESULTS;
+}
+
+#endif
-- 
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