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/*=========================================================================
Program: KWSys - Kitware System Library
Module: $RCSfile$
Copyright (c) Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef @KWSYS_NAMESPACE@_CommandLineArguments_hxx
#define @KWSYS_NAMESPACE@_CommandLineArguments_hxx
#include <@KWSYS_NAMESPACE@/Configure.h>
#include <@KWSYS_NAMESPACE@/Configure.hxx>
#include <@KWSYS_NAMESPACE@/stl/string>
/* Define this macro temporarily to keep the code readable. */
#if !defined (KWSYS_NAMESPACE) && !@KWSYS_NAMESPACE@_NAME_IS_KWSYS
# define kwsys_stl @KWSYS_NAMESPACE@_stl
#endif
namespace @KWSYS_NAMESPACE@
{
class CommandLineArgumentsInternal;
/** \class CommandLineArguments
* \brief Command line arguments processing code.
*
* Find specified arguments with optional options and execute specified methods
* or set given variables.
*
* The two interfaces it knows are callback based and variable based. For
* callback based, you have to register callback for particular argument using
* AddCallback method. When that argument is passed, the callback will be
* called with argument, value, and call data. For boolean (NO_ARGUMENT)
* arguments, the value is "1". If the callback returns 0 the argument parsing
* will stop with an error.
*
* For the variable interface you associate variable with each argument. When
* the argument is specified, the variable is set to the specified value casted
* to the apropriate type. For boolean (NO_ARGUMENT), the value is "1".
*
* Both interfaces can be used at the same time.
*
* Possible argument types are:
* NO_ARGUMENT - The argument takes no value : --A
* CONCAT_ARGUMENT - The argument takes value after no space : --Aval
* SPACE_ARGUMENT - The argument takes value after space : --A val
* EQUAL_ARGUMENT - The argument takes value after equal : --A=val
*
* Example use:
*
* kwsys::CommandLineArguments arg;
* arg.Initialize(argc, argv);
* typedef kwsys::CommandLineArguments argT;
* arg.AddArgument("--something", argT::EQUAL_ARGUMENT, &some_variable,
* "This is help string for --something");
* if ( !arg.Parse() )
* {
* kwsys_ios::cerr << "Problem parsing arguments" << kwsys_ios::endl;
* res = 1;
* }
*
*/
class @KWSYS_NAMESPACE@_EXPORT CommandLineArguments
{
public:
CommandLineArguments();
~CommandLineArguments();
/**
* Various argument types.
*/
enum ArgumentTypeEnum {
NO_ARGUMENT,
CONCAT_ARGUMENT,
SPACE_ARGUMENT,
EQUAL_ARGUMENT
};
/**
* Various variable types. When using the variable interface, this specifies
* what type the variable is.
*/
enum VariableTypeEnum {
NO_VARIABLE_TYPE = 0, // The variable is not specified
INT_TYPE, // The variable is integer (int)
BOOL_TYPE, // The vairable is boolean (bool)
DOUBLE_TYPE, // The variable is float (double)
STRING_TYPE, // The variable is string (char*)
STL_STRING_TYPE // The variable is string (char*)
};
/**
* Prototypes for callbacks for callback interface.
*/
typedef int(*CallbackType)(const char* argument, const char* value,
void* call_data);
typedef int(*ErrorCallbackType)(const char* argument, void* client_data);
/**
* Initialize internal data structures. This should be called before parsing.
*/
void Initialize(int argc, const char* const argv[]);
void Initialize(int argc, char* argv[]);
/**
* Initialize internal data structure and pass arguments one by one. This is
* convinience method for use from scripting languages where argc and argv
* are not available.
*/
void Initialize();
void ProcessArgument(const char* arg);
/**
* This method will parse arguments and call apropriate methods.
*/
int Parse();
/**
* This method will add a callback for a specific argument. The arguments to
* it are argument, argument type, callback method, and call data. The
* argument help specifies the help string used with this option. The
* callback and call_data can be skipped.
*/
void AddCallback(const char* argument, ArgumentTypeEnum type,
CallbackType callback, void* call_data, const char* help);
/**
* Add handler for argument which is going to set the variable to the
* specified value. If the argument is specified, the option is casted to the
* apropriate type.
*/
void AddArgument(const char* argument, ArgumentTypeEnum type, bool* variable,
const char* help);
void AddArgument(const char* argument, ArgumentTypeEnum type, int* variable,
const char* help);
void AddArgument(const char* argument, ArgumentTypeEnum type,
double* variable, const char* help);
void AddArgument(const char* argument, ArgumentTypeEnum type,
char** variable, const char* help);
void AddArgument(const char* argument, ArgumentTypeEnum type,
kwsys_stl::string* variable, const char* help);
/**
* Add handler for boolean argument. The argument does not take any option
* and if it is specified, the value of the variable is true/1, otherwise it
* is false/0.
*/
void AddBooleanArgument(const char* argument, bool* variable, const char*
help);
void AddBooleanArgument(const char* argument, int* variable, const char*
help);
/**
* Set the callbacks for error handling.
*/
void SetClientData(void* client_data);
void SetUnknownArgumentCallback(ErrorCallbackType callback);
/**
* Get remaining arguments. It allocates space for argv, so you have to call
* delete[] on it.
*/
void GetRemainingArguments(int* argc, char*** argv);
/**
* Return string containing help. If the argument is specified, only return
* help for that argument.
*/
const char* GetHelp() { return this->Help.c_str(); }
const char* GetHelp(const char* arg);
/**
* Get / Set the help line length. This length is used when generating the
* help page. Default length is 80.
*/
void SetLineLength(unsigned int);
unsigned int GetLineLength();
/**
* Get the executable name (argv0). This is only available when using
* Initialize with argc/argv.
*/
const char* GetArgv0();
/**
* Get index of the last argument parsed. This is the last argument that was
* parsed ok in the original argc/argv list.
*/
unsigned int GetLastArgument();
protected:
void GenerateHelp();
//! This is internal method that registers variable with argument
void AddArgument(const char* argument, ArgumentTypeEnum type,
VariableTypeEnum vtype, void* variable, const char* help);
typedef CommandLineArgumentsInternal Internal;
Internal* Internals;
kwsys_stl::string Help;
unsigned int LineLength;
};
} // namespace @KWSYS_NAMESPACE@
/* Undefine temporary macro. */
#if !defined (KWSYS_NAMESPACE) && !@KWSYS_NAMESPACE@_NAME_IS_KWSYS
# undef kwsys_stl
#endif
#endif
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