ctype

[pdclib] / functions / ctype / islower.c

diff --git a/functions/ctype/islower.c b/functions/ctype/islower.c
new file mode 100644 (file)
index 0000000..d98069a
--- /dev/null
+++ b/functions/ctype/islower.c
@@ -0,0 +1,34 @@
+/* $Id$ */
+
+/* islower( 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 islower( int c )
+{
+    return ( _PDCLIB_locale_info.ctype[c].flags & _PDCLIB_CTYPE_LOWER );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    TESTCASE( islower( 'a' ) );
+    TESTCASE( islower( 'z' ) );
+    TESTCASE( ! islower( 'A' ) );
+    TESTCASE( ! islower( 'Z' ) );
+    TESTCASE( ! islower( ' ' ) );
+    TESTCASE( ! islower( '@' ) );
+    return TEST_RESULTS;
+}
+
+#endif