include/cdio++ Add pre- and post- increment/decrement operators for

libcdio enums that it makes sense to iterate over.

example/C++/OO/*: use these
example/*: match up C and C++ programs better.

include/cdio++/Makefile.am

@@ -1,4 +1,4 @@
-#   $Id: Makefile.am,v 1.1 2005/11/10 11:11:16 rocky Exp $
+#   $Id: Makefile.am,v 1.2 2005/11/11 12:26:57 rocky Exp $
 #
 #    Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
 #
@@ -28,5 +28,6 @@ libcdioinclude_HEADERS = \
 	device.hpp \
 	devices.hpp \
 	disc.hpp \
+	enum.hpp \
 	read.hpp \
 	track.hpp

include/cdio++/cdio.hpp

@@ -1,5 +1,5 @@
 /* -*- C++ -*-
-    $Id: cdio.hpp,v 1.1 2005/11/10 11:11:16 rocky Exp $
+    $Id: cdio.hpp,v 1.2 2005/11/11 12:26:57 rocky Exp $
 
     Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
 
@@ -29,6 +29,10 @@
 
 #include <cdio/cdio.h>
 
+// Make pre- and post-increment operators for enums in libcdio where it 
+// makes sense.
+#include <cdio++/enum.hpp>
+
 class Cdio {
 
 public:

include/cdio++/enum.hpp

@@ -0,0 +1,50 @@
+/* -*- C++ -*-
+    $Id: enum.hpp,v 1.1 2005/11/11 12:26:57 rocky Exp $
+
+    Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/** \file enum.hpp
+ *
+ *  \brief C++ header for pre- and post-increment operators for 
+ *  enumerations defined in libcdio that it makes sense to iterate over.
+ */
+
+#define ENUM_ITERATE_FNS(type)			\
+  inline					\
+  type &operator++(type &t)			\
+  {						\
+    return t = type(t + 1);			\
+  }						\
+  inline					\
+  type  &operator++(type &t, int)		\
+  {						\
+    return t = type(t + 1);			\
+  }						\
+  inline					\
+  type &operator--(type &t)			\
+  {						\
+    return t = type(t - 1);			\
+  }						\
+  inline					\
+  type  &operator--(type &t, int)		\
+  {						\
+    return t = type(t - 1);			\
+  }
+
+ENUM_ITERATE_FNS(cdtext_field_t)
+ENUM_ITERATE_FNS(driver_id_t)

include/cdio/cdtext.h

@@ -1,5 +1,5 @@
 /*
-    $Id: cdtext.h,v 1.12 2005/11/10 00:44:40 rocky Exp $
+    $Id: cdtext.h,v 1.13 2005/11/11 12:26:57 rocky Exp $
 
     Copyright (C) 2004, 2005 Rocky Bernstein <rocky@panix.com>
     adapted from cuetools
@@ -37,6 +37,7 @@ extern "C" {
 #endif /* __cplusplus */
 
 #define MAX_CDTEXT_FIELDS 13
+#define MIN_CDTEXT_FIELD  0
   
   /*! \brief structure for holding CD-Text information
 
@@ -46,7 +47,9 @@ extern "C" {
     char *field[MAX_CDTEXT_FIELDS];
   };
   
-  /*! \brief A list of all of the CD-Text fields */
+  /*! \brief A list of all of the CD-Text fields. Because
+    the interval has no gaps, we can use ++ to iterate over fields.
+   */
   typedef enum {
     CDTEXT_ARRANGER   =  0,   /**< name(s) of the arranger(s) */
     CDTEXT_COMPOSER   =  1,   /**< name(s) of the composer(s) */

include/cdio/device.h

@@ -1,5 +1,5 @@
 /* -*- c -*-
-    $Id: device.h,v 1.25 2005/11/07 07:44:00 rocky Exp $
+    $Id: device.h,v 1.26 2005/11/11 12:26:57 rocky Exp $
 
     Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
 
@@ -136,6 +136,8 @@ extern "C" {
    * different than what is available on a given host.
    *
    * Order is a little significant since the order is used in scans.
+   * Also the enumeration values are assumed not to leave any holes so 
+   * we can use ++ to iterate over values. 
    * We have to start with DRIVER_UNKNOWN and devices should come before
    * disk-image readers. By putting something towards the top (a lower
    * enumeration number), in an iterative scan we prefer that to