X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fwchar%2Fwmemmove.c;fp=functions%2Fwchar%2Fwmemmove.c;h=e8d6075936b031a1e239828f1614631b126bcc7f;hb=14b5b78e19a79f590233caee7848e7cb19084088;hp=0000000000000000000000000000000000000000;hpb=41777e3d5dc655f59a8c3bcd071639e6878e853a;p=pdclib

diff --git a/functions/wchar/wmemmove.c b/functions/wchar/wmemmove.c
new file mode 100644
index 0000000..e8d6075
--- /dev/null
+++ b/functions/wchar/wmemmove.c
@@ -0,0 +1,49 @@
+/* wmemmove( wchar_t *, const wchar_t *, 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 <wchar.h>
+
+#ifndef REGTEST
+
+wchar_t * wmemmove( wchar_t * dest, const wchar_t * src, size_t n )
+{
+    wchar_t* rv = dest;
+    if ( dest <= src )
+    {
+        while ( n-- )
+        {
+            *dest++ = *src++;
+        }
+    }
+    else
+    {
+        src += n;
+        dest += n;
+        while ( n-- )
+        {
+            *--dest = *--src;
+        }
+    }
+    return rv;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    wchar_t s[] = L"xxxxabcde";
+    TESTCASE( wmemmove( s, s + 4, 5 ) == s );
+    TESTCASE( s[0] == L'a' );
+    TESTCASE( s[4] == L'e' );
+    TESTCASE( s[5] == L'b' );
+    TESTCASE( wmemmove( s + 4, s, 5 ) == s + 4 );
+    TESTCASE( s[4] == L'a' );
+    return TEST_RESULTS;
+}
+#endif