Method ReplaceSourceFileText

neo/framework/DeclManager.cpp:1957–2035

================= idDeclLocal::ReplaceSourceFileText ================= */

=================
*/
bool idDeclLocal::ReplaceSourceFileText( void ) {
	int oldFileLength, newFileLength;
	char *buffer;
	idFile *file;

	common->Printf( "Writing \'%s\' to \'%s\'...\n", GetName(), GetFileName() );

	if ( sourceFile == &declManagerLocal.implicitDecls ) {
		common->Warning( "Can't save implicit declaration %s.", GetName() );
		return false;
	}

	// get length and allocate buffer to hold the file
	oldFileLength = sourceFile->fileSize;
	newFileLength = oldFileLength - sourceTextLength + textLength;
	buffer = (char *) Mem_Alloc( Max( newFileLength, oldFileLength ) );

	// read original file
	if ( sourceFile->fileSize ) {

		file = fileSystem->OpenFileRead( GetFileName() );
		if ( !file ) {
			Mem_Free( buffer );
			common->Warning( "Couldn't open %s for reading.", GetFileName() );
			return false;
		}

		if ( file->Length() != sourceFile->fileSize || file->Timestamp() != sourceFile->timestamp ) {
			Mem_Free( buffer );
			common->Warning( "The file %s has been modified outside of the engine.", GetFileName() );
			return false;
		}

		file->Read( buffer, oldFileLength );
		fileSystem->CloseFile( file );

		if ( MD5_BlockChecksum( buffer, oldFileLength ) != sourceFile->checksum ) {
			Mem_Free( buffer );
			common->Warning( "The file %s has been modified outside of the engine.", GetFileName() );
			return false;
		}
	}

	// insert new text
	char *declText = (char *) _alloca( textLength + 1 );
	GetText( declText );
	memmove( buffer + sourceTextOffset + textLength, buffer + sourceTextOffset + sourceTextLength, oldFileLength - sourceTextOffset - sourceTextLength );
	memcpy( buffer + sourceTextOffset, declText, textLength );

	// write out new file
	file = fileSystem->OpenFileWrite( GetFileName(), "fs_devpath" );
	if ( !file ) {
		Mem_Free( buffer );
		common->Warning( "Couldn't open %s for writing.", GetFileName() );
		return false;
	}
	file->Write( buffer, newFileLength );
	fileSystem->CloseFile( file );