1 files changed, 113 insertions, 0 deletions

diff --git a/source/Commands/CommandObjectSyntax.cpp b/source/Commands/CommandObjectSyntax.cpp
new file mode 100644
index 0000000000000..d2021ea3eb193
--- /dev/null
+++ b/source/Commands/CommandObjectSyntax.cpp
@@ -0,0 +1,113 @@
+//===-- CommandObjectSyntax.cpp ---------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/lldb-python.h"
+
+#include "CommandObjectSyntax.h"
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/Interpreter/Args.h"
+#include "lldb/Interpreter/Options.h"
+
+#include "lldb/Interpreter/CommandInterpreter.h"
+#include "lldb/Interpreter/CommandReturnObject.h"
+#include "lldb/Interpreter/CommandObjectMultiword.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+//-------------------------------------------------------------------------
+// CommandObjectSyntax
+//-------------------------------------------------------------------------
+
+CommandObjectSyntax::CommandObjectSyntax (CommandInterpreter &interpreter) :
+    CommandObjectParsed (interpreter,
+                         "syntax",
+                         "Shows the correct syntax for a given debugger command.",
+                         "syntax <command>")
+{
+    CommandArgumentEntry arg;
+    CommandArgumentData command_arg;
+
+    // Define the first (and only) variant of this arg.
+    command_arg.arg_type = eArgTypeCommandName;
+    command_arg.arg_repetition = eArgRepeatPlain;
+
+    // There is only one variant this argument could be; put it into the argument entry.
+    arg.push_back (command_arg);
+
+    // Push the data for the first argument into the m_arguments vector.
+    m_arguments.push_back (arg);
+}
+
+CommandObjectSyntax::~CommandObjectSyntax()
+{
+}
+
+
+bool
+CommandObjectSyntax::DoExecute (Args& command, CommandReturnObject &result)
+{
+    CommandObject::CommandMap::iterator pos;
+    CommandObject *cmd_obj;
+    const size_t argc = command.GetArgumentCount();
+
+    if (argc > 0)
+    {
+        cmd_obj = m_interpreter.GetCommandObject (command.GetArgumentAtIndex(0));
+        bool all_okay = true;
+        for (size_t i = 1; i < argc; ++i)
+        {
+            std::string sub_command = command.GetArgumentAtIndex (i);
+            if (!cmd_obj->IsMultiwordObject())
+                all_okay = false;
+            else
+            {
+                cmd_obj = cmd_obj->GetSubcommandObject(sub_command.c_str());
+                if (!cmd_obj)
+                    all_okay = false;
+            }
+        }
+        
+        if (all_okay && (cmd_obj != NULL))
+        {
+            Stream &output_strm = result.GetOutputStream();
+            if (cmd_obj->GetOptions() != NULL)
+            {
+                output_strm.Printf ("\nSyntax: %s\n", cmd_obj->GetSyntax());
+                output_strm.Printf ("(Try 'help %s' for more information on command options syntax.)\n",
+                                    cmd_obj->GetCommandName());
+                result.SetStatus (eReturnStatusSuccessFinishNoResult);
+            }
+            else
+            {
+                output_strm.Printf ("\nSyntax: %s\n", cmd_obj->GetSyntax());
+                result.SetStatus (eReturnStatusSuccessFinishNoResult);
+            }
+        }
+        else
+        {
+            std::string cmd_string;
+            command.GetCommandString (cmd_string);
+            result.AppendErrorWithFormat ("'%s' is not a known command.\n", cmd_string.c_str());
+            result.AppendError ("Try 'help' to see a current list of commands.");
+            result.SetStatus (eReturnStatusFailed);
+        }
+    }
+    else
+    {
+        result.AppendError ("Must call 'syntax' with a valid command.");
+        result.SetStatus (eReturnStatusFailed);
+    }
+
+    return result.Succeeded();
+}