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implement the "null command" which repeats the last command

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10702 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-06 05:36:30 +00:00
parent 90ab32f9f0
commit 8b1125f53d
1 changed files with 25 additions and 5 deletions
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30
tools/llvm-db/CLIDebugger.cpp
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@ -43,9 +43,9 @@ CLIDebugger::CLIDebugger()
&CLIDebugger::fileCommand));
addCommand("create", new BuiltinCLICommand(
"Start the current program, stopping execution in main",
"Start the program, halting its execution in main",
"This command creates an instance of the current program, but stops"
" execution immediately.",
"\nexecution immediately.\n",
&CLIDebugger::createCommand));
addCommand("kill", new BuiltinCLICommand(
@ -186,7 +186,7 @@ CLICommand *CLIDebugger::getCommand(const std::string &Command) {
CommandTable.lower_bound(Command);
if (Command == "") {
throw "Null command not implemented yet.";
throw "Null command should not get here!";
} else if (CI == CommandTable.end() ||
!isValidPrefix(Command, CI->first)) {
// If this command has no relation to anything in the command table,
@ -225,6 +225,11 @@ int CLIDebugger::run() {
std::string Command;
std::cout << Prompt;
// Keep track of the last command issued, so that we can reissue it if the
// user hits enter as the command.
CLICommand *LastCommand = 0;
std::string LastArgs;
// Continue reading commands until the end of file.
while (getline(std::cin, Command)) {
std::string Arguments = Command;
@ -233,8 +238,23 @@ int CLIDebugger::run() {
Command = getToken(Arguments, " \t\n\v\f\r\\/;.*&");
try {
// Look up the command and execute it.
getCommand(Command)->runCommand(*this, Arguments);
CLICommand *CurCommand;
if (Command == "") {
CurCommand = LastCommand;
Arguments = LastArgs;
} else {
CurCommand = getCommand(Command);
}
// Save the command we are running in case the user wants us to repeat it
// next time.
LastCommand = CurCommand;
LastArgs = Arguments;
// Finally, execute the command.
if (CurCommand)
CurCommand->runCommand(*this, Arguments);
} catch (int RetVal) {
// The quit command exits the command loop by throwing an integer return