--- /dev/null
+/* $Id$ */
+
+/* isxdigit( 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 isxdigit( int c )
+{
+ return ( _PDCLIB_locale_info.ctype[c].flags & _PDCLIB_CTYPE_XDIGT );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ TESTCASE( isxdigit( '0' ) );
+ TESTCASE( isxdigit( '9' ) );
+ TESTCASE( isxdigit( 'a' ) );
+ TESTCASE( isxdigit( 'f' ) );
+ TESTCASE( ! isxdigit( 'g' ) );
+ TESTCASE( isxdigit( 'A' ) );
+ TESTCASE( isxdigit( 'F' ) );
+ TESTCASE( ! isxdigit( 'G' ) );
+ TESTCASE( ! isxdigit( '@' ) );
+ TESTCASE( ! isxdigit( ' ' ) );
+ return TEST_RESULTS;
+}
+
+#endif