Add new "alias" command.

	* NEWS: Mention new command.
	* command.h (valid_user_defined_cmd_name_p): Declare.
	* defs.h (make_cleanup_dyn_string_delete): Declare.
	* utils.c: #include "dyn-string.h".
	(do_dyn_string_delete, make_cleanup_dyn_string_delete): New functions.
	* cli/cli-cmds.c: #include "dyn-string.h".
	(argv_to_dyn_string, valid_command_p, alias_command): New functions.
	(init_cli_cmds): Add new command.
	* cli/cli-decode.c (valid_user_defined_cmd_name_p): New function.

	doc/
	* gdb.texinfo (Extending GDB): Document alias command.

	testsuite/
	* gdb.base/alias.exp: Add tests for alias command.

1 files changed, 68 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.base/alias.exp b/gdb/testsuite/gdb.base/alias.exp
new file mode 100644
index 0000000..66384c0
--- /dev/null
+++ b/gdb/testsuite/gdb.base/alias.exp
@@ -0,0 +1,68 @@
+# Test the alias command.
+# Copyright 2011 Free Software Foundation, Inc.
+
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+
+gdb_exit
+gdb_start
+gdb_reinitialize_dir $srcdir/$subdir
+
+# Helper to test the -a option to alias.
+# Aliases that are abbreviations of commands (e.g. r -> run)
+# do not appear in help output.
+
+proc test_abbrev_not_present { alias_name } {
+    global gdb_prompt
+    set alias_present 0
+    set test_name "abbrev $alias_name not present in help command list"
+    gdb_test_multiple "help aliases" $test_name {
+	-re "\[\r\n\]$alias_name \[^\r\n\]*" {
+	    set alias_present 1
+	    exp_continue
+	}
+	-re ".*$gdb_prompt $" {
+	    if { !$alias_present } then {
+		pass $test_name
+	    } else {
+		fail $test_name
+	    }
+	}
+    }
+}
+
+proc test_abbrev_alias { name gdb_command test_value } {
+    gdb_test_no_output $gdb_command
+    gdb_test_no_output "$name print elements $test_value"
+    gdb_test "show print elements" "Limit .* is $test_value\[.\]" "verify $name"
+    test_abbrev_not_present $name
+}
+
+test_abbrev_alias set2 "alias -a set2=set" 42
+test_abbrev_alias set3 "alias -a set3= set" 43
+test_abbrev_alias set4 "alias -a set4 =set" 44
+test_abbrev_alias set5 "alias -a set5 = set" 45
+test_abbrev_alias set6 "alias -a -- set6 = set" 46
+test_abbrev_alias -a "alias -a -- -a = set" 47
+
+gdb_test "alias set2=set" "already exists: set2"
+gdb_test "alias foo=bar" "Invalid command to alias to: bar"
+
+gdb_test_no_output "alias spe = set p elem"
+gdb_test_no_output "spe 50"
+gdb_test "show print elements" "Limit .* is 50\[.\]" "verify spe"
+
+gdb_test_no_output "alias set pr elms = set p elem"
+gdb_test_no_output "set pr elms 51"
+gdb_test "show print elements" "Limit .* is 51\[.\]" "verify set pr elms"
+gdb_test "help set print" "set print elms .*"