wxWidgets/include/wx/cmdargs.h
Julian Smart a790886d7f Added missing return type
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49911 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2007-11-13 15:11:26 +00:00

153 lines
3.8 KiB
C++

///////////////////////////////////////////////////////////////////////////////
// Name: wx/cmdargs.h
// Purpose: declaration of wxCmdLineArgsArray helper class
// Author: Vadim Zeitlin
// Created: 2007-11-12
// RCS-ID: $Id$
// Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_CMDARGS_H_
#define _WX_CMDARGS_H_
#include "wx/arrstr.h"
// ----------------------------------------------------------------------------
// wxCmdLineArgsArray: helper class used by wxApp::argv
// ----------------------------------------------------------------------------
#if wxUSE_UNICODE
// this class is used instead of either "char **" or "wchar_t **" (neither of
// which would be backwards compatible with all the existing code) for argv
// field of wxApp
//
// as it's used for compatibility, it tries to look as much as traditional
// (char **) argv as possible, in particular it provides implicit conversions
// to "char **" and also array-like operator[]
class WXDLLIMPEXP_BASE wxCmdLineArgsArray
{
public:
wxCmdLineArgsArray() { m_argsA = NULL; m_argsW = NULL; }
template <typename T>
wxCmdLineArgsArray& operator=(T **argv)
{
FreeArgs();
m_args.clear();
if ( argv )
{
while ( *argv )
m_args.push_back(*argv++);
}
return *this;
}
operator char**() const
{
if ( !m_argsA )
{
const size_t count = m_args.size();
m_argsA = new char *[count];
for ( size_t n = 0; n < count; n++ )
m_argsA[n] = wxStrdup(m_args[n].ToAscii());
}
return m_argsA;
}
operator wchar_t**() const
{
if ( !m_argsW )
{
const size_t count = m_args.size();
m_argsW = new wchar_t *[count];
for ( size_t n = 0; n < count; n++ )
m_argsW[n] = wxStrdup(m_args[n].wc_str());
}
return m_argsW;
}
// existing code does checks like "if ( argv )" and we want it to continue
// to compile, so provide this conversion even if it is pretty dangerous
operator bool() const
{
return !m_args.empty();
}
// and the same for "if ( !argv )" checks
bool operator!() const
{
return m_args.empty();
}
wxString operator[](size_t n) const
{
return m_args[n];
}
// we must provide this overload for g++ 3.4 which can't choose between
// our operator[](size_t) and ::operator[](char**, int) otherwise
wxString operator[](int n) const
{
return m_args[n];
}
// convenience methods, i.e. not existing only for backwards compatibility
// do we have any arguments at all?
bool IsEmpty() const { return m_args.empty(); }
// access the arguments as a convenient array of wxStrings
const wxArrayString& GetArguments() const { return m_args; }
~wxCmdLineArgsArray()
{
FreeArgs();
}
private:
template <typename T>
void Free(T **args)
{
if ( !args )
return;
const size_t count = m_args.size();
for ( size_t n = 0; n < count; n++ )
free(args[n]);
delete [] args;
}
void FreeArgs()
{
Free(m_argsA);
Free(m_argsW);
}
wxArrayString m_args;
mutable char **m_argsA;
mutable wchar_t **m_argsW;
DECLARE_NO_COPY_CLASS(wxCmdLineArgsArray)
};
// provide global operator overload for compatibility with the existing code
// doing things like "if ( condition && argv )"
inline bool operator&&(bool cond, const wxCmdLineArgsArray& array)
{
return cond && !array.IsEmpty();
}
#endif // wxUSE_UNICODE
#endif // _WX_CMDARGS_H_