PDCLIB-2: Pure wide character functions

[pdclib] / functions / wchar / wcsncmp.c

diff --git a/functions/wchar/wcsncmp.c b/functions/wchar/wcsncmp.c
new file mode 100644 (file)
index 0000000..920d647
--- /dev/null
+++ b/functions/wchar/wcsncmp.c
@@ -0,0 +1,54 @@
+/* $Id$ */\r
+\r
+/* wcsncmp( const 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
+int wcsncmp( const wchar_t * s1, const wchar_t * s2, size_t n )\r
+{\r
+    while ( *s1 && n && ( *s1 == *s2 ) )\r
+    {\r
+        ++s1;\r
+        ++s2;\r
+        --n;\r
+    }\r
+    if ( ( n == 0 ) )\r
+    {\r
+        return 0;\r
+    }\r
+    else\r
+    {\r
+        return ( *(wchar_t *)s1 - *(wchar_t *)s2 );\r
+    }\r
+}\r
+\r
+#endif\r
+\r
+#ifdef TEST\r
+#include <_PDCLIB_test.h>\r
+\r
+int main( void )\r
+{\r
+    wchar_t cmpabcde[] = L"abcde\0f";\r
+    wchar_t cmpabcd_[] = L"abcde\xfc";\r
+    wchar_t empty[] = L"";\r
+    wchar_t x[] = L"x";\r
+    TESTCASE( wcsncmp( wabcde, cmpabcde, 5 ) == 0 );\r
+    TESTCASE( wcsncmp( wabcde, cmpabcde, 10 ) == 0 );\r
+    TESTCASE( wcsncmp( wabcde, wabcdx, 5 ) < 0 );\r
+    TESTCASE( wcsncmp( wabcdx, wabcde, 5 ) > 0 );\r
+    TESTCASE( wcsncmp( empty, wabcde, 5 ) < 0 );\r
+    TESTCASE( wcsncmp( wabcde, empty, 5 ) > 0 );\r
+    TESTCASE( wcsncmp( wabcde, wabcdx, 4 ) == 0 );\r
+    TESTCASE( wcsncmp( wabcde, x, 0 ) == 0 );\r
+    TESTCASE( wcsncmp( wabcde, x, 1 ) < 0 );\r
+    TESTCASE( wcsncmp( wabcde, cmpabcd_, 10 ) < 0 );\r
+    return TEST_RESULTS;\r
+}\r
+#endif\r