PDCLIB-2: Pure wide character functions

[pdclib] / functions / wchar / wcsncat.c

diff --git a/functions/wchar/wcsncat.c b/functions/wchar/wcsncat.c
new file mode 100644 (file)
index 0000000..b0c976c
--- /dev/null
+++ b/functions/wchar/wcsncat.c
@@ -0,0 +1,60 @@
+/* wcsncat( 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 * wcsncat( wchar_t * _PDCLIB_restrict s1, \r
+                   const wchar_t * _PDCLIB_restrict s2, \r
+                   size_t n )\r
+{\r
+    wchar_t * rc = s1;\r
+    while ( *s1 )\r
+    {\r
+        ++s1;\r
+    }\r
+    while ( n && ( *s1++ = *s2++ ) )\r
+    {\r
+        --n;\r
+    }\r
+    if ( n == 0 )\r
+    {\r
+        *s1 = '\0';\r
+    }\r
+    return rc;\r
+}\r
+\r
+#endif\r
+\r
+#ifdef TEST\r
+#include <_PDCLIB_test.h>\r
+\r
+int main( void )\r
+{\r
+    wchar_t s[] = L"xx\0xxxxxx";\r
+    TESTCASE( wcsncat( s, wabcde, 10 ) == s );\r
+    TESTCASE( s[2] == L'a' );\r
+    TESTCASE( s[6] == L'e' );\r
+    TESTCASE( s[7] == L'\0' );\r
+    TESTCASE( s[8] == L'x' );\r
+    s[0] = L'\0';\r
+    TESTCASE( wcsncat( s, wabcdx, 10 ) == s );\r
+    TESTCASE( s[4] == L'x' );\r
+    TESTCASE( s[5] == L'\0' );\r
+    TESTCASE( wcsncat( s, "\0", 10 ) == s );\r
+    TESTCASE( s[5] == L'\0' );\r
+    TESTCASE( s[6] == L'e' );\r
+    TESTCASE( wcsncat( s, wabcde, 0 ) == s );\r
+    TESTCASE( s[5] == L'\0' );\r
+    TESTCASE( s[6] == L'e' );\r
+    TESTCASE( wcsncat( s, wabcde, 3 ) == s );\r
+    TESTCASE( s[5] == L'a' );\r
+    TESTCASE( s[7] == L'c' );\r
+    TESTCASE( s[8] == L'\0' );\r
+    return TEST_RESULTS;\r
+}\r
+#endif\r