Introduce generic_value_print

This introduces generic_value_print, which is a value-based analogue
to generic_val_print.  For now this is unused and simply calls
generic_val_print, but subsequent patches will both change this
function to work using the value API directly, and convert callers of
generic_val_print to call this instead.

gdb/ChangeLog
2020-03-13  Tom Tromey  <tom@tromey.com>

	* valprint.h (generic_value_print): Declare.
	* valprint.c (generic_value_print): New function.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2020-03-13  Tom Tromey  <tom@tromey.com>
+
+	* valprint.h (generic_value_print): Declare.
+	* valprint.c (generic_value_print): New function.
+
 2020-03-13  Tom Tromey  <tom@tromey.com>
 
 	* valprint.c (do_val_print): Call la_value_print_inner, if

gdb/valprint.c

@@ -1033,6 +1033,18 @@ generic_val_print (struct type *type,
     }
 }
 
+/* See valprint.h.  */
+
+void
+generic_value_print (struct value *val, struct ui_file *stream, int recurse,
+		     const struct value_print_options *options,
+		     const struct generic_val_print_decorations *decorations)
+{
+  generic_val_print (value_type (val), value_embedded_offset (val),
+		     value_address (val), stream, recurse, val, options,
+		     decorations);
+}
+
 /* Helper function for val_print and common_val_print that does the
    work.  Arguments are as to val_print, but FULL_VALUE, if given, is
    the value to be printed.  */

gdb/valprint.h

@@ -211,6 +211,17 @@ extern void generic_val_print (struct type *type,
 			       const struct value_print_options *options,
 			       const struct generic_val_print_decorations *);
 
+/* Print a value in a generic way.  VAL is the value, STREAM is where
+   to print it, RECURSE is the recursion depth, OPTIONS describe how
+   the printing should be done, and D is the language-specific
+   decorations object.  Note that structs and unions cannot be printed
+   by this function.  */
+
+extern void generic_value_print (struct value *val, struct ui_file *stream,
+				 int recurse,
+				 const struct value_print_options *options,
+				 const struct generic_val_print_decorations *d);
+
 extern void generic_emit_char (int c, struct type *type, struct ui_file *stream,
 			       int quoter, const char *encoding);