ctype

[pdclib] / functions / ctype / isalnum.c

diff --git a/functions/ctype/isalnum.c b/functions/ctype/isalnum.c
new file mode 100644 (file)
index 0000000..d6e217b
--- /dev/null
+++ b/functions/ctype/isalnum.c
@@ -0,0 +1,37 @@
+/* $Id$ */
+
+/* isalnum( int )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <ctype.h>
+
+#ifndef REGTEST
+
+int isalnum( int c )
+{
+    return ( _PDCLIB_locale_info.ctype[c].flags & ( _PDCLIB_CTYPE_ALPHA | _PDCLIB_CTYPE_DIGIT ) );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    TESTCASE( isalnum( 'a' ) );
+    TESTCASE( isalnum( 'z' ) );
+    TESTCASE( isalnum( 'A' ) );
+    TESTCASE( isalnum( 'Z' ) );
+    TESTCASE( isalnum( '0' ) );
+    TESTCASE( isalnum( '9' ) );
+    TESTCASE( ! isalnum( ' ' ) );
+    TESTCASE( ! isalnum( '\n' ) );
+    TESTCASE( ! isalnum( '@' ) );
+    return TEST_RESULTS;
+}
+
+#endif