Add API routine to get last session number.

lib/driver/cdio_private.h

@@ -1,5 +1,5 @@
 /*
-    $Id: cdio_private.h,v 1.19 2005/03/05 09:26:52 rocky Exp $
+    $Id: cdio_private.h,v 1.20 2005/03/05 10:10:16 rocky Exp $
 
     Copyright (C) 2003, 2004, 2005 Rocky Bernstein <rocky@panix.com>
 
@@ -202,6 +202,15 @@ extern "C" {
     bool (*get_hwinfo) 
 	 ( const CdIo_t *p_cdio, /* out*/ cdio_hwinfo_t *p_hw_info );
 
+    /*!
+       Return the session number of the last on the CD. 
+	   
+       @param p_cdio the CD object to be acted upon.
+       @param i_last_session pointer to the session number to be returned.
+    */
+    driver_return_code_t (*get_last_session)
+	 (void *p_env, /*out*/ unsigned int *i_last_session);
+
     /*! 
       Find out if media has changed since the last call.
       @param p_env the CD object to be acted upon.

lib/driver/device.c

@@ -1,5 +1,5 @@
 /*
-    $Id: device.c,v 1.10 2005/02/10 01:59:06 rocky Exp $
+    $Id: device.c,v 1.11 2005/03/05 10:10:16 rocky Exp $
 
     Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
 
@@ -576,6 +576,21 @@ cdio_get_hwinfo (const CdIo_t *p_cdio, cdio_hwinfo_t *hw_info)
   }
 }
 
+/*!
+  Return the session number of the last on the CD. 
+  
+  @param p_cdio the CD object to be acted upon.
+  @param i_last_session pointer to the session number to be returned.
+*/
+driver_return_code_t cdio_get_last_session (CdIo_t *p_cdio, /*out*/ unsigned 
+                                            int *i_last_session)
+{
+  if (!p_cdio) return DRIVER_OP_UNINIT;
+  if (p_cdio->op.get_last_session)
+    return p_cdio->op.get_last_session(p_cdio->env, i_last_session);
+  return DRIVER_OP_UNSUPPORTED;
+}
+
 /*! 
   Find out if media has changed since the last call.
   @param p_cdio the CD object to be acted upon.

lib/driver/gnu_linux.c

@@ -1,5 +1,5 @@
 /*
-    $Id: gnu_linux.c,v 1.1 2005/03/05 09:26:52 rocky Exp $
+    $Id: gnu_linux.c,v 1.2 2005/03/05 10:10:16 rocky Exp $
 
     Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
     Copyright (C) 2002, 2003, 2004, 2005 Rocky Bernstein <rocky@panix.com>
@@ -27,7 +27,7 @@
 # include "config.h"
 #endif
 
-static const char _rcsid[] = "$Id: gnu_linux.c,v 1.1 2005/03/05 09:26:52 rocky Exp $";
+static const char _rcsid[] = "$Id: gnu_linux.c,v 1.2 2005/03/05 10:10:16 rocky Exp $";
 
 #include <string.h>
 
@@ -396,6 +396,33 @@ get_drive_cap_linux (const void *p_user_data,
 }
 #endif
 
+/*!
+  Return the session number of the last on the CD. 
+  
+  @param p_cdio the CD object to be acted upon.
+  @param i_last_session pointer to the session number to be returned.
+*/
+static driver_return_code_t 
+get_last_session_linux (void *p_user_data, 
+                        /*out*/ unsigned int *i_last_session)
+{
+  const _img_private_t *p_env = p_user_data;
+  struct cdrom_multisession ms;
+  int i_rc;
+  
+  ms.addr_format = CDROM_LBA;
+  i_rc = ioctl(p_env->gen.fd, CDROMMULTISESSION, &ms);
+  if (0 == i_rc) {
+    *i_last_session = ms.addr.lba;
+    return DRIVER_OP_SUCCESS;
+  } else {
+    cdio_warn ("ioctl CDROMMULTISESSION failed: %s\n", strerror(errno));  
+    return DRIVER_OP_ERROR;
+  }
+}
+
+
+
 /*! 
   Find out if media has changed since the last call.
   @param p_user_data the environment object to be acted upon.
@@ -1318,6 +1345,7 @@ cdio_open_am_linux (const char *psz_orig_source, const char *access_mode)
 #endif
     .get_first_track_num   = get_first_track_num_generic,
     .get_hwinfo            = NULL,
+    .get_last_session      = get_last_session_linux,
     .get_media_changed     = get_media_changed_linux,
     .get_mcn               = get_mcn_linux,
     .get_num_tracks        = get_num_tracks_generic,

lib/driver/libcdio.sym

@@ -62,6 +62,7 @@ cdio_get_first_track_num
 cdio_get_hwinfo
 cdio_get_joliet_level
 cdio_get_last_track_num
+cdio_get_last_session
 cdio_get_media_changed
 cdio_get_mcn
 cdio_get_num_tracks