guile: Add 'history-append!' procedure.

gdb/
2014-02-26  Ludovic Courtès  <ludo@gnu.org>

	* guile/scm-value.c (gdbscm_history_append_x): New function.
	(value_functions): Add it.

gdb/testsuite/
2014-02-26  Ludovic Courtès  <ludo@gnu.org>

	* gdb.guile/scm-value.exp (test_value_in_inferior): Add
	test for 'history-append!'.

gdb/doc/
2014-02-26  Ludovic Courtès  <ludo@gnu.org>

	* gdb/doc/guile.texi (Basic Guile): Document 'history-append!'.

1 files changed, 25 insertions, 0 deletions

diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
index f7f27cee..8ca0762 100644
--- a/gdb/guile/scm-value.c
+++ b/gdb/guile/scm-value.c
@@ -1297,6 +1297,27 @@ gdbscm_history_ref (SCM index)
 
   return vlscm_scm_from_value (res_val);
 }
+
+/* (history-append! <gdb:value>) -> index
+   Append VALUE to GDB's value history.  Return its index in the history.  */
+
+static SCM
+gdbscm_history_append_x (SCM value)
+{
+  int res_index = -1;
+  struct value *v;
+  volatile struct gdb_exception except;
+
+  v = vlscm_scm_to_value (value);
+
+  TRY_CATCH (except, RETURN_MASK_ALL)
+    {
+      res_index = record_latest_value (v);
+    }
+  GDBSCM_HANDLE_GDB_EXCEPTION (except);
+
+  return scm_from_int (res_index);
+}
 
 /* Initialize the Scheme value code.  */
 
@@ -1459,6 +1480,10 @@ Evaluates string in gdb and returns the result as a <gdb:value> object." },
     "\
 Return the specified value from GDB's value history." },
 
+  { "history-append!", 1, 0, 0, gdbscm_history_append_x,
+    "\
+Append the specified value onto GDB's value history." },
+
   END_FUNCTIONS
 };