* src/devices/dev.c, src/devices/dev.h: Added first_device()

and next_device() to abstract manipulations to the devices
	list.  Now change all the code that uses direct access to
	these functions...

ChangeLog

@@ -1,3 +1,9 @@
+2000-07-05  Arno W. Peters  <A.W.Peters@ieee.org>
+
+	* src/devices/dev.c: Added first_device() and next_device() to
+	abstract manipulations to the devices list.  Now change all the
+	code that uses direct access to these functions...
+
 2000-07-03  Arno W. Peters  <A.W.Peters@ieee.org>
 
 	* src/parser/alias.c, src/parser/alias.h: contain frontend alias

src/spicelib/devices/dev.c

@@ -158,14 +158,43 @@ num_devices(void)
     return sizeof(DEVices)/sizeof(SPICEdev *);
 }
 
+
 IFdevice **
 devices_ptr(void)
 {
     return (IFdevice **) DEVices;
 }
 
+
 SPICEdev **
 devices(void)
 {
     return DEVices;
 }
+
+
+/* Returns the first device in the list, or NULL if the list is empty */
+SPICEdev *
+first_device(void)
+{
+    return DEVices[0];
+}
+
+
+/* Returns the next device on the list, or NULL if no more devices
+   left. */
+SPICEdev *
+next_device(SPICEdev *current)
+{
+    SPICEdev *ret;
+    int index;
+
+    index = (current - first_device()) / sizeof(SPICEdev *);
+    if (index < num_devices()) {
+	ret = DEVices[index + 1];
+    } else {
+	ret = NULL;
+    }
+
+    return ret;
+}

src/spicelib/devices/dev.h

@@ -1,9 +1,12 @@
 #ifndef _DEV_H
 #define _DEV_H
 
+
 int num_devices(void);
 IFdevice **devices_ptr(void);
 SPICEdev **devices(void);
+SPICEdev *first_device(void);
+SPICEdev *next_device(SPICEdev *current);
 
 #endif