X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fwchar%2Fwcsncat.c;fp=functions%2Fwchar%2Fwcsncat.c;h=b0c976cc94111b4f860ee285efd7e465ddcdbd0f;hb=507d3eccbf4c74e4694165f9e00ab79d894b4f66;hp=0000000000000000000000000000000000000000;hpb=0150bb9ffe66236b6a47c5800d8beef669d5c047;p=pdclib.old

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