protot/3rdparty/RuntimeCompiledCpp/RuntimeObjectSystem/RuntimeSourceDependency.h

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//
// Copyright (c) 2010-2011 Matthew Jack and Doug Binks
//
// 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.
#pragma once
#ifndef RUNTIMESOURCEDEPENDENCY_INCLUDED
#define RUNTIMESOURCEDEPENDENCY_INCLUDED
//NOTE: the file macro will only emit the full path if /FC option is used in visual studio or /ZI (Which forces /FC)
//Following creates a list of files which are runtime modifiable, to be used in headers
//requires use of __COUNTER__ predefined macro, which is in gcc 4.3+, clang/llvm and MSVC
// Source Dependencies are constructed from a macro template from sources which may include
// the __FILE__ macro, so to reduce inter-dependencies we return three values which are combined
// by the higher level code. The full source dependency filename is then pseudo-code:
// RemoveAnyFileName( relativeToPath ) + ReplaceExtension( filename, extension )
struct SourceDependencyInfo
{
static SourceDependencyInfo GetNULL() { SourceDependencyInfo ret = {0,0,0}; return ret; }
const char* filename; // If NULL then no SourceDependencyInfo
const char* extension; // If NULL then use extension in filename
const char* relativeToPath; // If NULL filename is either full or relative to known path
};
#ifndef RCCPPOFF
struct IRuntimeSourceDependencyList
{
IRuntimeSourceDependencyList( size_t max ) : MaxNum( max )
{
}
// GetIncludeFile may return 0, so you should iterate through to GetMaxNum() ignoring 0 returns
virtual SourceDependencyInfo GetSourceDependency( size_t Num_ ) const
{
return SourceDependencyInfo::GetNULL();
}
size_t MaxNum; // initialized in constructor below
};
namespace
{
template< size_t COUNT > struct RuntimeSourceDependency : RuntimeSourceDependency<COUNT-1>
{
RuntimeSourceDependency( size_t max ) : RuntimeSourceDependency<COUNT-1>( max )
{
}
RuntimeSourceDependency() : RuntimeSourceDependency<COUNT-1>( COUNT )
{
}
virtual SourceDependencyInfo GetSourceDependency( size_t Num_ ) const
{
if( Num_ < COUNT )
{
return this->RuntimeSourceDependency< COUNT-1 >::GetSourceDependency( Num_ );
}
else return SourceDependencyInfo::GetNULL();
}
};
template<> struct RuntimeSourceDependency<0> : IRuntimeSourceDependencyList
{
RuntimeSourceDependency( size_t max ) : IRuntimeSourceDependencyList( max )
{
}
RuntimeSourceDependency() : IRuntimeSourceDependencyList( 0 )
{
}
virtual SourceDependencyInfo GetSourceDependency( size_t Num_ ) const
{
return SourceDependencyInfo::GetNULL();
}
};
#define RUNTIME_COMPILER_SOURCEDEPENDENCY_BASE( SOURCEFILE, SOURCEEXT, RELATIVEPATHTO, N ) \
template<> struct RuntimeSourceDependency< N + 1 > : RuntimeSourceDependency< N >\
{ \
RuntimeSourceDependency( size_t max ) : RuntimeSourceDependency<N>( max ) {} \
RuntimeSourceDependency< N + 1 >() : RuntimeSourceDependency<N>( N + 1 ) {} \
virtual SourceDependencyInfo GetSourceDependency( size_t Num_ ) const \
{ \
if( Num_ <= N ) \
{ \
if( Num_ == N ) \
{ \
return { SOURCEFILE, SOURCEEXT, RELATIVEPATHTO }; \
} \
else return this->RuntimeSourceDependency< N >::GetSourceDependency( Num_ ); \
} \
else return SourceDependencyInfo::GetNULL(); \
} \
}; \
// The RUNTIME_COMPILER_SOURCEDEPENDENCY macro will return the name of the current file, which should be a header file.
// The runtime system will strip off the extension and add .cpp
#define RUNTIME_COMPILER_SOURCEDEPENDENCY namespace { RUNTIME_COMPILER_SOURCEDEPENDENCY_BASE( __FILE__, ".cpp", 0, __COUNTER__ ) }
// if you want to specify another extension use this version:
#define RUNTIME_COMPILER_SOURCEDEPENDENCY_EXT( EXT_ ) namespace { RUNTIME_COMPILER_SOURCEDEPENDENCY_BASE( __FILE__, EXT_, 0, __COUNTER__ ) }
// for complete freedom of which file to specify, use this version (FILE_ is relative to current file path):
#define RUNTIME_COMPILER_SOURCEDEPENDENCY_FILE( FILE_, EXT_ ) namespace { RUNTIME_COMPILER_SOURCEDEPENDENCY_BASE( FILE_, EXT_, __FILE__, __COUNTER__ ) }
}
#else
#define RUNTIME_COMPILER_SOURCEDEPENDENCY
#endif //RCCPPOFF
#endif //RUNTIMESOURCEDEPENDENCY_INCLUDED