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112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
//===- CLICommand.h - Classes used to represent commands --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a small class hierarchy used to represent the various types
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// of commands in the CLI debugger front-end.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CLICOMMAND_H
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#define CLICOMMAND_H
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#include <string>
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#include <vector>
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#include <cassert>
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namespace llvm {
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class CLIDebugger;
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/// CLICommand - Base class of the hierarchy, used to provide the abstract
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/// interface common to all commands.
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///
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class CLICommand {
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/// ShortHelp, LongHelp - The short and long helps strings printed for the
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/// command. The ShortHelp string should be a single line of text without a
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/// newline. The LongHelp string should be a full description with
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/// terminating newline.
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std::string ShortHelp, LongHelp;
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/// RefCount - This contains the number of entries in the CLIDebugger
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/// CommandTable that points to this command.
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unsigned RefCount;
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/// OptionNames - This contains a list of names for the option. Keeping
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/// track of this is done just to make the help output more helpful.
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///
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std::vector<std::string> OptionNames;
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public:
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CLICommand(const std::string &SH, const std::string &LH)
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: ShortHelp(SH), LongHelp(LH), RefCount(0) {}
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virtual ~CLICommand() {}
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/// addRef/dropRef - Implement a simple reference counting scheme to make
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/// sure we delete commands that are no longer used.
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void addRef() { ++RefCount; }
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void dropRef() {
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if (--RefCount == 0) delete this;
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}
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/// getPrimaryOptionName - Return the first name the option was added under.
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/// This is the name we report for the option in the help output.
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std::string getPrimaryOptionName() const {
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return OptionNames.empty() ? "" : OptionNames[0];
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}
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/// getOptionName - Return all of the names the option is registered as.
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///
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const std::vector<std::string> &getOptionNames() const {
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return OptionNames;
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}
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/// addOptionName - Add a name that this option is known as.
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///
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void addOptionName(const std::string &Name) {
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OptionNames.push_back(Name);
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}
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/// removeOptionName - Eliminate one of the names for this option.
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///
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void removeOptionName(const std::string &Name) {
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unsigned i = 0;
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for (; OptionNames[i] != Name; ++i)
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assert(i+1 < OptionNames.size() && "Didn't find option name!");
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OptionNames.erase(OptionNames.begin()+i);
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}
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/// getShortHelp - Return the short help string for this command.
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///
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const std::string &getShortHelp() { return ShortHelp; }
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/// getLongHelp - Return the long help string for this command, if it
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/// exists.
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const std::string &getLongHelp() { return LongHelp; }
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virtual void runCommand(CLIDebugger &D, std::string &Arguments) = 0;
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};
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/// BuiltinCLICommand - This class represents commands that are built directly
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/// into the debugger.
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class BuiltinCLICommand : public CLICommand {
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// Impl - Pointer to the method that implements the command
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void (CLIDebugger::*Impl)(std::string&);
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public:
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BuiltinCLICommand(const std::string &ShortHelp, const std::string &LongHelp,
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void (CLIDebugger::*impl)(std::string&))
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: CLICommand(ShortHelp, LongHelp), Impl(impl) {}
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void runCommand(CLIDebugger &D, std::string &Arguments) {
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(D.*Impl)(Arguments);
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}
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};
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}
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#endif
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