X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fctype%2Fisupper.c;fp=functions%2Fctype%2Fisupper.c;h=76c1ff19463d539db2a7989e1af2e9ac18b1ad67;hb=3a92b78272cd3f0f413bb1cfc0c77deef49967fd;hp=0000000000000000000000000000000000000000;hpb=be35e77c0d824e5bd545620ca81c812f9e16f0e5;p=pdclib.old

diff --git a/functions/ctype/isupper.c b/functions/ctype/isupper.c
new file mode 100644
index 0000000..76c1ff1
--- /dev/null
+++ b/functions/ctype/isupper.c
@@ -0,0 +1,34 @@
+/* $Id$ */
+
+/* isupper( 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 isupper( int c )
+{
+    return ( _PDCLIB_locale_info.ctype[c].flags & _PDCLIB_CTYPE_UPPER );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    TESTCASE( isupper( 'A' ) );
+    TESTCASE( isupper( 'Z' ) );
+    TESTCASE( ! isupper( 'a' ) );
+    TESTCASE( ! isupper( 'z' ) );
+    TESTCASE( ! isupper( ' ' ) );
+    TESTCASE( ! isupper( '@' ) );
+    return TEST_RESULTS;
+}
+
+#endif