-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-// Character handling
-// ----------------------------------------------------------------------------
-
-#ifndef __CTYPE_H
-#define __CTYPE_H __CTYPE_H
-
-// ----------------------------------------------------------------------------
-// FUNCTIONS
-
-// returns nonzero if c is alphanumeric in the locale.
+/* ----------------------------------------------------------------------------
+ * $Id$
+ * ----------------------------------------------------------------------------
+ * Public Domain C Library - http://pdclib.sourceforge.net
+ * This code is Public Domain. Use, modify, and redistribute at will.
+ * ----------------------------------------------------------------------------
+ * Character handling
+ * --------------------------------------------------------------------------*/
+
+#ifndef _CTYPE_H
+#define _CTYPE_H _CTYPE_H
+
+/* ----------------------------------------------------------------------------
+ * FUNCTIONS
+ * --------------------------------------------------------------------------*/
+
+/* returns nonzero if c is alphanumeric in the locale. */
int isalnum( int c );
-// returns nonzero if c is alphabetic character in the locale.
+/* returns nonzero if c is alphabetic character in the locale. */
int isalpha( int c );
-// returns nonzero if c is a horizontal blank in the locale.
+/* returns nonzero if c is a horizontal blank in the locale. */
int isblank( int c );
-// returns nonzero if c is a control character in the locale.
+/* returns nonzero if c is a control character in the locale. */
int iscntrl( int c );
-// returns nonzero if c is a digit in the locale.
+/* returns nonzero if c is a digit in the locale. */
int isdigit( int c );
-// returns nonzero if c is alphanumeric or a punctuation in the locale.
+/* returns nonzero if c is alphanumeric or a punctuation in the locale. */
int isgraph( int c );
-// returns nonzero if c is a lowercase alphabetic character in the locale.
+/* returns nonzero if c is a lowercase alphabetic character in the locale. */
int islower( int c );
-// returns nonzero if c is a printable character ( isgraph() or isblank() ) in
-// the locale.
+/* returns nonzero if c is a printable character ( isgraph() or isblank() ) in
+ * the locale. */
int isprint( int c );
-// returns nonzero if c is a punctuation in the locale.
+/* returns nonzero if c is a punctuation in the locale. */
int ispunct( int c );
-// returns nonzero if c is a whitespace in the locale.
+/* returns nonzero if c is a whitespace in the locale. */
int isspace( int c );
-// returns nonzero if c is an uppercase alphabetical character in the locale.
+/* returns nonzero if c is an uppercase alphabetical character in the locale. */
int isupper( int c );
-// returns nonzero if c is a hexedecimal digit in the locale.
+/* returns nonzero if c is a hexedecimal digit in the locale. */
int isxdigit( int c );
-// returns lowercase equivalent for c in locale.
+/* returns lowercase equivalent for c in locale. */
int tolower( int c );
-// returns uppercase equivalent for c in locale.
+/* returns uppercase equivalent for c in locale. */
int toupper( int c );
-#endif // __CTYPE_H
+#endif /* _CTYPE_H */