C++ Tokenizer::Start方法代码示例

//[-------------------------------------------------------]
//[ Public RTTI methods                                   ]
//[-------------------------------------------------------]
bool TransferFunctionLoaderTABLE::Load(TransferFunction &cTransferFunction, File &cFile)
{
	// Get the image holding the transfer function
	Image &cImage = cTransferFunction.GetImage();

	// A "table"-file (simple ASCII) looks like this
	/*
		1 1 1 1
		baseOpacity: 0.698039
		NoTags
		0 0 0 0
		. . . .
		. . . .
		. . . .
	*/

	// Use the tokenizer in order to gather all required information, ignore the rest
	// Startup the tokenizer
	Tokenizer cTokenizer;
	cTokenizer.Start(cFile.GetContentAsString());

	// Ignore the first line ("1 1 1 1")
	cTokenizer.GetNextToken();
	cTokenizer.GetNextToken();
	cTokenizer.GetNextToken();
	cTokenizer.GetNextToken();

	// Ignore base opacity ("baseOpacity: 0.698039")
	cTokenizer.GetNextToken();
	cTokenizer.GetNextToken();

	// Ignore tags to keep this loader simple ("NoTags")
	cTokenizer.GetNextToken();

	// Create image buffer
	ImageBuffer *pImageBuffer = cImage.CreatePart()->CreateMipmap();
	pImageBuffer->CreateImage(DataByte, ColorRGBA, Vector3i(256, 1, 1));

	// Read in the palette
	uint8 *pImageData = pImageBuffer->GetData();
	for (uint32 i=0; i<256; i++) {
		// Read RGBA entry
		*pImageData = cTokenizer.GetNextToken().GetUInt8();
		pImageData++;
		*pImageData = cTokenizer.GetNextToken().GetUInt8();
		pImageData++;
		*pImageData = cTokenizer.GetNextToken().GetUInt8();
		pImageData++;
		*pImageData = cTokenizer.GetNextToken().GetUInt8();
		pImageData++;
	}

	// Done
	return true;
}

/**
*  @brief
*    Parses an pl_module_plugin..pl_module_end block
*/
void PLPluginInfo::ParsePluginModuleBlock(const String &sPluginModuleBlock)
{
	// Setup regular expressions
	RegEx cRegExModulePlugin("^\\s*pl_module_plugin\\(\\s*\\\"(?<name>\\w*)\\\"\\s*\\)\\s*$");
	RegEx cRegExVendor("^\\s*pl_module_vendor\\s*\\(\\s*\\\"(?<text>.*)\\\"\\s*\\)\\s*$", RegEx::MatchCaseSensitive);
	RegEx cRegExLicense("^\\s*pl_module_license\\s*\\(\\s*\\\"(?<text>.*)\\\"\\s*\\)\\s*$", RegEx::MatchCaseSensitive);
	RegEx cRegExDescription("^\\s*pl_module_description\\s*\\(\\s*\\\"(?<text>.*)\\\"\\s*\\)\\s*$", RegEx::MatchCaseSensitive);
	RegEx cRegExVersion("^\\s*pl_module_version\\s*\\(\\s*\\\"(?<text>.*)\\\"\\s*\\)\\s*$", RegEx::MatchCaseSensitive);
	RegEx cRegExActive("^\\s*pl_module_active\\s*\\((?<num>\\d)\\)\\s*$");
	RegEx cRegExDelayed("^\\s*pl_module_delayed\\s*\\((?<num>\\d)\\)\\s*$");

	// Setup tokenizer
	Tokenizer cTokenizer;
	cTokenizer.SetDelimiters("\r\n");
	cTokenizer.SetSingleChars("");
	cTokenizer.SetQuotes("");
	cTokenizer.SetCommentStartTag("");
	cTokenizer.SetCommentEndTag("");
	cTokenizer.SetSingleLineComment("");
	cTokenizer.Start(sPluginModuleBlock);

	// Iterate through all lines
	String sLine = cTokenizer.GetNextToken();
	while (sLine.GetLength()) {
		// Check for pl_module_plugin
		if (cRegExModulePlugin.Match(sLine)) {
			m_sPluginName = cRegExModulePlugin.GetNameResult("name");

		// Check for pl_module_vendor
		} else if (cRegExVendor.Match(sLine)) {
			m_sVendor = cRegExVendor.GetNameResult("text");

		// Check for pl_module_license
		} else if (cRegExLicense.Match(sLine)) {
			m_sLicense = cRegExLicense.GetNameResult("text");

		// Check for pl_module_description
		} else if (cRegExDescription.Match(sLine)) {
			m_sDescription = cRegExDescription.GetNameResult("text");

		// Check for pl_module_version
		} else if (cRegExVersion.Match(sLine)) {
			m_sModuleVersion = cRegExVersion.GetNameResult("text");

		// Check for pl_module_active
		} else if (cRegExActive.Match(sLine)) {
			m_bActive = cRegExActive.GetNameResult("num").GetBool();

		// Check for pl_module_delayed
		} else if (cRegExDelayed.Match(sLine)) {
			m_bDelayed = cRegExDelayed.GetNameResult("num").GetBool();

		// Let PLPluginPlatformInfo parse the line
		} else {
			m_cPluginPlatformInfo.ParseLine(sLine);
		}

		// Next, please
		sLine = cTokenizer.GetNextToken();
	}
}

//[-------------------------------------------------------]
//[ Public RTTI methods                                   ]
//[-------------------------------------------------------]
bool VolumeLoaderDAT::Load(Volume &cVolume, File &cFile)
{
	Url cObjectFilename;
	Vector3i vResolution;
	EDataFormat nFormat = DataByte;

	// Get the image holding the volumetric data
	Image &cImage = cVolume.GetVolumeImage();

	{ // Use the tokenizer in order to gather all required information, ignore the rest
		// A "dat"-file (simple ASCII) looks like this
		/*
			ObjectFileName: Teddybear.raw
			TaggedFileName: ---
			Resolution:     128 128 62
			SliceThickness: 2.8 2.8 5
			Format:         UCHAR
			NbrTags:        0
			ObjectType:     TEXTURE_VOLUME_OBJECT
			ObjectModel:    RGBA
			GridType:       EQUIDISTANT
		*/

		// Startup the tokenizer
		Tokenizer cTokenizer;
		cTokenizer.Start(cFile.GetContentAsString());

		// Loop through all tokens
		String sToken = cTokenizer.GetNextToken();
		while (sToken.GetLength()) {
			// ObjectFileName
			if (sToken == "ObjectFileName:") {
				// The file format specification says:
				//	"The object file name refers to the name of the data file, which contains the raw voxel data.
				//	 This can be either an absolute path or a relative path with respect to the storage position of the dat file."

				// Get the value
				cObjectFilename = cTokenizer.GetNextToken();

			// Resolution
			} else if (sToken == "Resolution:") {
				// The file format specification says:
				//	"The volume data set consists of a large array of voxel values. The resolution of the data set is given
				//	 by the number of voxels in x-, y- and z- direction."

				// Get the values
				vResolution.x = cTokenizer.GetNextToken().GetInt();
				vResolution.y = cTokenizer.GetNextToken().GetInt();
				vResolution.z = cTokenizer.GetNextToken().GetInt();

			// SliceThickness
			} else if (sToken == "SliceThickness:") {
				// The file format specification says:
				//	"The size of one voxel in x-, y- and z- direction (usually in millimeters)."

				//						  mm to cm    cm to m
				static const float Scale = 0.1f    *   0.01f;

				// Get the values
				Vector3 vSliceThickness;
				vSliceThickness.x = cTokenizer.GetNextToken().GetFloat()*Scale;
				vSliceThickness.y = cTokenizer.GetNextToken().GetFloat()*Scale;
				vSliceThickness.z = cTokenizer.GetNextToken().GetFloat()*Scale;

				// Set the size of one voxel (without metric, but usually one unit is equal to one meter)
				cVolume.SetVoxelSize(vSliceThickness);

			// Format
			} else if (sToken == "Format:") {
				// The file format specification says:
				//	"The data format of one voxel. Can be either UCHAR (8 bit) or USHORT (16 bit)."

				// Get the value
				const String sFormat = cTokenizer.GetNextToken();
				if (sFormat == "UCHAR")
					nFormat = DataByte;	// Byte (8 bit)
				else if (sFormat == "USHORT")
					nFormat = DataWord;	// Word (16 bit)
			}

			// Next token, please
			sToken = cTokenizer.GetNextToken();
		}
	}

	// Valid settings? If so, open and read in the raw data...
	if (!cObjectFilename.IsEmpty() && vResolution.x > 0 && vResolution.y > 0 && vResolution.z > 0) {
		// The file format specification says:
		//	"The data file simply contains the raw voxel data as a large binary array which is indexed as
		//	 voxel(x,y,z) = array[z * YDIM * XDIM + y * XDIM + x],
		//	 with XDIM, YDIM and ZDIM referring to the resolution of the data set, as specified in line 3
		//	 of the header file. For 16 bit data, the data may be stored either in big endian or little endian format."
		//	-> We expect "Little Endian First"

		// Get the filename of the raw file
		const String sRawFilename = cObjectFilename.IsAbsolute() ? cObjectFilename.GetUrl() : (cFile.GetUrl().CutFilename() + cObjectFilename.GetUrl());

//.........这里部分代码省略.........