PDCLIB-2: Pure wide character functions

[pdclib] / functions / wchar / wmemmove.c

diff --git a/functions/wchar/wmemmove.c b/functions/wchar/wmemmove.c
new file mode 100644 (file)
index 0000000..e8d6075
--- /dev/null
+++ b/functions/wchar/wmemmove.c
@@ -0,0 +1,49 @@
+/* wmemmove( wchar_t *, const wchar_t *, size_t )\r
+\r
+   This file is part of the Public Domain C Library (PDCLib).\r
+   Permission is granted to use, modify, and / or redistribute at will.\r
+*/\r
+\r
+#include <wchar.h>\r
+\r
+#ifndef REGTEST\r
+\r
+wchar_t * wmemmove( wchar_t * dest, const wchar_t * src, size_t n )\r
+{\r
+    wchar_t* rv = dest;\r
+    if ( dest <= src )\r
+    {\r
+        while ( n-- )\r
+        {\r
+            *dest++ = *src++;\r
+        }\r
+    }\r
+    else\r
+    {\r
+        src += n;\r
+        dest += n;\r
+        while ( n-- )\r
+        {\r
+            *--dest = *--src;\r
+        }\r
+    }\r
+    return rv;\r
+}\r
+\r
+#endif\r
+\r
+#ifdef TEST\r
+#include <_PDCLIB_test.h>\r
+\r
+int main( void )\r
+{\r
+    wchar_t s[] = L"xxxxabcde";\r
+    TESTCASE( wmemmove( s, s + 4, 5 ) == s );\r
+    TESTCASE( s[0] == L'a' );\r
+    TESTCASE( s[4] == L'e' );\r
+    TESTCASE( s[5] == L'b' );\r
+    TESTCASE( wmemmove( s + 4, s, 5 ) == s + 4 );\r
+    TESTCASE( s[4] == L'a' );\r
+    return TEST_RESULTS;\r
+}\r
+#endif\r