Visto che MFC è un framework C++ io userei un approccio un po' meno low-level:
Codice PHP:/*------------------------------------------------------
CCmdLine.cpp
A utility for parsing command lines.
Copyright (C) 1999 Chris Losinger, Smaller Animals Software.
[url]http://www.smalleranimals.com[/url]
This software is provided 'as-is', without any express
or implied warranty. In no event will the authors be
held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software
for any purpose, including commercial applications, and
to alter it and redistribute it freely, subject to the
following restrictions:
1. The origin of this software must not be misrepresented;
you must not claim that you wrote the original software.
If you use this software in a product, an acknowledgment
in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such,
and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
// if you're using MFC, you'll need to un-comment this line
// #include "stdafx.h"
#include "CmdLine.h"
#include "crtdbg.h"
/*------------------------------------------------------
int CCmdLine::SplitLine(int argc, char **argv)
parse the command line into switches and arguments
returns number of switches found
------------------------------------------------------*/
int CCmdLine::SplitLine(int argc, char **argv)
{
clear();
StringType curParam; // current argv[x]
// skip the exe name (start with i = 1)
for (int i = 1; i < argc; i++)
{
// if it's a switch, start a new CCmdLine
if (IsSwitch(argv[i]))
{
curParam = argv[i];
StringType arg;
// look at next input string to see if it's a switch or an argument
if (i + 1 < argc)
{
if (!IsSwitch(argv[i + 1]))
{
// it's an argument, not a switch
arg = argv[i + 1];
// skip to next
i++;
}
else
{
arg = "";
}
}
// add it
CCmdParam cmd;
cmd.m_strings.push_back(arg);
// add the CCmdParam to 'this'
pair<CCmdLine::iterator, bool> res = insert(CCmdLine::value_type(curParam, cmd));
}
else
{
// it's not a new switch, so it must be more stuff for the last switch
// ...let's add it
CCmdLine::iterator theIterator;
// get an iterator for the current param
theIterator = find(curParam);
if (theIterator!=end())
{
(*theIterator).second.m_strings.push_back(argv[i]);
}
else
{
// ??
}
}
}
return size();
}
/*------------------------------------------------------
protected member function
test a parameter to see if it's a switch :
switches are of the form : -x
where 'x' is one or more characters.
the first character of a switch must be non-numeric!
------------------------------------------------------*/
bool CCmdLine::IsSwitch(const char *pParam)
{
if (pParam==NULL)
return false;
// switches must non-empty
// must have at least one character after the '-'
int len = strlen(pParam);
if (len <= 1)
{
return false;
}
// switches always start with '-'
if (pParam[0]=='-')
{
// allow negative numbers as arguments.
// ie., don't count them as switches
return (!isdigit(pParam[1]));
}
else
{
return false;
}
}
/*------------------------------------------------------
bool CCmdLine::HasSwitch(const char *pSwitch)
was the switch found on the command line ?
ex. if the command line is : app.exe -a p1 p2 p3 -b p4 -c -d p5
call return
---- ------
cmdLine.HasSwitch("-a") true
cmdLine.HasSwitch("-z") false
------------------------------------------------------*/
bool CCmdLine::HasSwitch(const char *pSwitch)
{
CCmdLine::iterator theIterator;
theIterator = find(pSwitch);
return (theIterator!=end());
}
/*------------------------------------------------------
StringType CCmdLine::GetSafeArgument(const char *pSwitch, int iIdx, const char *pDefault)
fetch an argument associated with a switch . if the parameter at
index iIdx is not found, this will return the default that you
provide.
example :
command line is : app.exe -a p1 p2 p3 -b p4 -c -d p5
call return
---- ------
cmdLine.GetSafeArgument("-a", 0, "zz") p1
cmdLine.GetSafeArgument("-a", 1, "zz") p2
cmdLine.GetSafeArgument("-b", 0, "zz") p4
cmdLine.GetSafeArgument("-b", 1, "zz") zz
------------------------------------------------------*/
StringType CCmdLine::GetSafeArgument(const char *pSwitch, int iIdx, const char *pDefault)
{
StringType sRet;
if (pDefault!=NULL)
sRet = pDefault;
try
{
sRet = GetArgument(pSwitch, iIdx);
}
catch (...)
{
}
return sRet;
}
/*------------------------------------------------------
StringType CCmdLine::GetArgument(const char *pSwitch, int iIdx)
fetch a argument associated with a switch. throws an exception
of (int)0, if the parameter at index iIdx is not found.
example :
command line is : app.exe -a p1 p2 p3 -b p4 -c -d p5
call return
---- ------
cmdLine.GetArgument("-a", 0) p1
cmdLine.GetArgument("-b", 1) throws (int)0, returns an empty string
------------------------------------------------------*/
StringType CCmdLine::GetArgument(const char *pSwitch, int iIdx)
{
if (HasSwitch(pSwitch))
{
CCmdLine::iterator theIterator;
theIterator = find(pSwitch);
if (theIterator!=end())
{
if ((*theIterator).second.m_strings.size() > iIdx)
{
return (*theIterator).second.m_strings[iIdx];
}
}
}
throw (int)0;
return "";
}
/*------------------------------------------------------
int CCmdLine::GetArgumentCount(const char *pSwitch)
returns the number of arguments found for a given switch.
returns -1 if the switch was not found
------------------------------------------------------*/
int CCmdLine::GetArgumentCount(const char *pSwitch)
{
int iArgumentCount = -1;
if (HasSwitch(pSwitch))
{
CCmdLine::iterator theIterator;
theIterator = find(pSwitch);
if (theIterator!=end())
{
iArgumentCount = (*theIterator).second.m_strings.size();
}
}
return iArgumentCount;
}
Codice PHP:/*
CCmdLine.h
Example :
Sample command line :
MyApp.exe -p1 text1 text2 -p2 "this is a big argument" -opt1 -55 -opt2
Switches -p1 and -p2 are required.
p1 has two arguments and p2 has one.
Switches -opt1 and -opt2 are optional.
opt1 requires a numeric argument.
opt2 has no arguments.
Also, assume that the app displays a 'help' screen if the '-h' switch
is present on the command line.
#include "CmdLine.h"
void main(int argc, char **argv)
{
// our cmd line parser object
CCmdLine cmdLine;
// parse argc,argv
if (cmdLine.SplitLine(argc, argv) < 1)
{
// no switches were given on the command line, abort
ASSERT(0);
exit(-1);
}
// test for the 'help' case
if (cmdLine.HasSwitch("-h"))
{
show_help();
exit(0);
}
// get the required arguments
StringType p1_1, p1_2, p2_1;
try
{
// if any of these fail, we'll end up in the catch() block
p1_1 = cmdLine.GetArgument("-p1", 0);
p1_2 = cmdLine.GetArgument("-p1", 1);
p2_1 = cmdLine.GetArgument("-p2", 0);
}
catch (...)
{
// one of the required arguments was missing, abort
ASSERT(0);
exit(-1);
}
// get the optional parameters
// convert to an int, default to '100'
int iOpt1Val = atoi(cmdLine.GetSafeArgument("-opt1", 0, 100));
// since opt2 has no arguments, just test for the presence of
// the '-opt2' switch
bool bOptVal2 = cmdLine.HasSwitch("-opt2");
.... and so on....
}
If this class is used in an MFC application, StringType is CString, else
it uses the STL 'string' type.
If this is an MFC app, you can use the __argc and __argv macros from
you CYourWinApp::InitInstance() function in place of the standard argc
and argv variables.
*/
#ifndef SACMDSH
#define SACMDSH
#ifdef __AFX_H__
// if we're using MFC, use CStrings
#define StringType CString
#else
// if we're not using MFC, use STL strings
#define StringType string
#endif
// tell the compiler to shut up
#pragma warning(disable:4786)
//#include <iostream> // you may need this
#include <map>
#include <string>
#include <vector>
using namespace std ;
// handy little container for our argument vector
struct CCmdParam
{
vector<StringType> m_strings;
};
// this class is actually a map of strings to vectors
typedef map<StringType, CCmdParam> _CCmdLine;
// the command line parser class
class CCmdLine : public _CCmdLine
{
public:
/*-
int CCmdLine::SplitLine(int argc, char **argv)
parse the command line into switches and arguments.
returns number of switches found
-*/
int SplitLine(int argc, char **argv);
/*-
bool CCmdLine::HasSwitch(const char *pSwitch)
was the switch found on the command line ?
ex. if the command line is : app.exe -a p1 p2 p3 -b p4 -c -d p5
call return
---- ------
cmdLine.HasSwitch("-a") true
cmdLine.HasSwitch("-z") false
-*/
bool HasSwitch(const char *pSwitch);
/*------------------------------------------------------
StringType CCmdLine::GetSafeArgument(const char *pSwitch, int iIdx, const char *pDefault)
fetch an argument associated with a switch . if the parameter at
index iIdx is not found, this will return the default that you
provide.
example :
command line is : app.exe -a p1 p2 p3 -b p4 -c -d p5
call return
---- ------
cmdLine.GetSafeArgument("-a", 0, "zz") p1
cmdLine.GetSafeArgument("-a", 1, "zz") p2
cmdLine.GetSafeArgument("-b", 0, "zz") p4
cmdLine.GetSafeArgument("-b", 1, "zz") zz
------------------------------------------------------*/
StringType GetSafeArgument(const char *pSwitch, int iIdx, const char *pDefault);
/*------------------------------------------------------
StringType CCmdLine::GetArgument(const char *pSwitch, int iIdx)
fetch a argument associated with a switch. throws an exception
of (int)0, if the parameter at index iIdx is not found.
example :
command line is : app.exe -a p1 p2 p3 -b p4 -c -d p5
call return
---- ------
cmdLine.GetArgument("-a", 0) p1
cmdLine.GetArgument("-b", 1) throws (int)0, returns an empty string
------------------------------------------------------*/
StringType GetArgument(const char *pSwitch, int iIdx);
/*------------------------------------------------------
int CCmdLine::GetArgumentCount(const char *pSwitch)
returns the number of arguments found for a given switch.
returns -1 if the switch was not found
------------------------------------------------------*/
int GetArgumentCount(const char *pSwitch);
protected:
/*------------------------------------------------------
protected member function
test a parameter to see if it's a switch :
switches are of the form : -x
where 'x' is one or more characters.
the first character of a switch must be non-numeric!
------------------------------------------------------*/
bool IsSwitch(const char *pParam);
};
#endif
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