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268 lines
9.8 KiB
C++
268 lines
9.8 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing#kwsys for details. */
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#ifndef @KWSYS_NAMESPACE@_CommandLineArguments_hxx
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#define @KWSYS_NAMESPACE@_CommandLineArguments_hxx
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#include <@KWSYS_NAMESPACE@/Configure.h>
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#include <@KWSYS_NAMESPACE@/Configure.hxx>
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#include <string>
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#include <vector>
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namespace @KWSYS_NAMESPACE@ {
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class CommandLineArgumentsInternal;
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struct CommandLineArgumentsCallbackStructure;
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/** \class CommandLineArguments
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* \brief Command line arguments processing code.
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*
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* Find specified arguments with optional options and execute specified methods
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* or set given variables.
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*
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* The two interfaces it knows are callback based and variable based. For
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* callback based, you have to register callback for particular argument using
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* AddCallback method. When that argument is passed, the callback will be
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* called with argument, value, and call data. For boolean (NO_ARGUMENT)
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* arguments, the value is "1". If the callback returns 0 the argument parsing
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* will stop with an error.
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*
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* For the variable interface you associate variable with each argument. When
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* the argument is specified, the variable is set to the specified value casted
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* to the appropriate type. For boolean (NO_ARGUMENT), the value is "1".
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*
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* Both interfaces can be used at the same time.
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*
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* Possible argument types are:
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* NO_ARGUMENT - The argument takes no value : --A
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* CONCAT_ARGUMENT - The argument takes value after no space : --Aval
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* SPACE_ARGUMENT - The argument takes value after space : --A val
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* EQUAL_ARGUMENT - The argument takes value after equal : --A=val
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* MULTI_ARGUMENT - The argument takes values after space : --A val1 val2
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* val3 ...
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*
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* Example use:
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*
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* kwsys::CommandLineArguments arg;
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* arg.Initialize(argc, argv);
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* typedef kwsys::CommandLineArguments argT;
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* arg.AddArgument("--something", argT::EQUAL_ARGUMENT, &some_variable,
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* "This is help string for --something");
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* if ( !arg.Parse() )
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* {
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* std::cerr << "Problem parsing arguments" << std::endl;
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* res = 1;
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* }
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*
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*/
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class @KWSYS_NAMESPACE@_EXPORT CommandLineArguments
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{
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public:
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CommandLineArguments();
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~CommandLineArguments();
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/**
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* Various argument types.
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*/
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enum ArgumentTypeEnum
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{
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NO_ARGUMENT,
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CONCAT_ARGUMENT,
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SPACE_ARGUMENT,
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EQUAL_ARGUMENT,
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MULTI_ARGUMENT
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};
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/**
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* Various variable types. When using the variable interface, this specifies
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* what type the variable is.
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*/
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enum VariableTypeEnum
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{
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NO_VARIABLE_TYPE = 0, // The variable is not specified
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INT_TYPE, // The variable is integer (int)
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BOOL_TYPE, // The variable is boolean (bool)
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DOUBLE_TYPE, // The variable is float (double)
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STRING_TYPE, // The variable is string (char*)
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STL_STRING_TYPE, // The variable is string (char*)
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VECTOR_INT_TYPE, // The variable is integer (int)
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VECTOR_BOOL_TYPE, // The variable is boolean (bool)
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VECTOR_DOUBLE_TYPE, // The variable is float (double)
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VECTOR_STRING_TYPE, // The variable is string (char*)
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VECTOR_STL_STRING_TYPE, // The variable is string (char*)
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LAST_VARIABLE_TYPE
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};
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/**
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* Prototypes for callbacks for callback interface.
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*/
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typedef int (*CallbackType)(const char* argument, const char* value,
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void* call_data);
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typedef int (*ErrorCallbackType)(const char* argument, void* client_data);
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/**
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* Initialize internal data structures. This should be called before parsing.
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*/
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void Initialize(int argc, const char* const argv[]);
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void Initialize(int argc, char* argv[]);
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/**
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* Initialize internal data structure and pass arguments one by one. This is
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* convenience method for use from scripting languages where argc and argv
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* are not available.
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*/
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void Initialize();
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void ProcessArgument(const char* arg);
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/**
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* This method will parse arguments and call appropriate methods.
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*/
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int Parse();
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/**
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* This method will add a callback for a specific argument. The arguments to
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* it are argument, argument type, callback method, and call data. The
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* argument help specifies the help string used with this option. The
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* callback and call_data can be skipped.
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*/
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void AddCallback(const char* argument, ArgumentTypeEnum type,
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CallbackType callback, void* call_data, const char* help);
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/**
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* Add handler for argument which is going to set the variable to the
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* specified value. If the argument is specified, the option is casted to the
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* appropriate type.
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*/
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void AddArgument(const char* argument, ArgumentTypeEnum type, bool* variable,
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const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type, int* variable,
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const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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double* variable, const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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char** variable, const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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std::string* variable, const char* help);
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/**
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* Add handler for argument which is going to set the variable to the
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* specified value. If the argument is specified, the option is casted to the
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* appropriate type. This will handle the multi argument values.
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*/
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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std::vector<bool>* variable, const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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std::vector<int>* variable, const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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std::vector<double>* variable, const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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std::vector<char*>* variable, const char* help);
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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std::vector<std::string>* variable, const char* help);
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/**
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* Add handler for boolean argument. The argument does not take any option
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* and if it is specified, the value of the variable is true/1, otherwise it
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* is false/0.
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*/
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void AddBooleanArgument(const char* argument, bool* variable,
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const char* help);
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void AddBooleanArgument(const char* argument, int* variable,
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const char* help);
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void AddBooleanArgument(const char* argument, double* variable,
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const char* help);
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void AddBooleanArgument(const char* argument, char** variable,
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const char* help);
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void AddBooleanArgument(const char* argument, std::string* variable,
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const char* help);
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/**
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* Set the callbacks for error handling.
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*/
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void SetClientData(void* client_data);
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void SetUnknownArgumentCallback(ErrorCallbackType callback);
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/**
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* Get remaining arguments. It allocates space for argv, so you have to call
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* delete[] on it.
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*/
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void GetRemainingArguments(int* argc, char*** argv);
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void DeleteRemainingArguments(int argc, char*** argv);
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/**
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* If StoreUnusedArguments is set to true, then all unknown arguments will be
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* stored and the user can access the modified argc, argv without known
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* arguments.
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*/
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void StoreUnusedArguments(bool val) { this->StoreUnusedArgumentsFlag = val; }
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void GetUnusedArguments(int* argc, char*** argv);
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/**
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* Return string containing help. If the argument is specified, only return
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* help for that argument.
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*/
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const char* GetHelp() { return this->Help.c_str(); }
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const char* GetHelp(const char* arg);
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/**
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* Get / Set the help line length. This length is used when generating the
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* help page. Default length is 80.
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*/
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void SetLineLength(unsigned int);
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unsigned int GetLineLength();
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/**
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* Get the executable name (argv0). This is only available when using
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* Initialize with argc/argv.
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*/
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const char* GetArgv0();
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/**
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* Get index of the last argument parsed. This is the last argument that was
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* parsed ok in the original argc/argv list.
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*/
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unsigned int GetLastArgument();
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protected:
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void GenerateHelp();
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//! This is internal method that registers variable with argument
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void AddArgument(const char* argument, ArgumentTypeEnum type,
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VariableTypeEnum vtype, void* variable, const char* help);
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bool GetMatchedArguments(std::vector<std::string>* matches,
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const std::string& arg);
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//! Populate individual variables
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bool PopulateVariable(CommandLineArgumentsCallbackStructure* cs,
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const char* value);
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//! Populate individual variables of type ...
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void PopulateVariable(bool* variable, const std::string& value);
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void PopulateVariable(int* variable, const std::string& value);
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void PopulateVariable(double* variable, const std::string& value);
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void PopulateVariable(char** variable, const std::string& value);
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void PopulateVariable(std::string* variable, const std::string& value);
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void PopulateVariable(std::vector<bool>* variable, const std::string& value);
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void PopulateVariable(std::vector<int>* variable, const std::string& value);
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void PopulateVariable(std::vector<double>* variable,
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const std::string& value);
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void PopulateVariable(std::vector<char*>* variable,
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const std::string& value);
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void PopulateVariable(std::vector<std::string>* variable,
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const std::string& value);
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typedef CommandLineArgumentsInternal Internal;
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Internal* Internals;
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std::string Help;
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unsigned int LineLength;
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bool StoreUnusedArgumentsFlag;
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};
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} // namespace @KWSYS_NAMESPACE@
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#endif
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