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Copied from configuration, renaming Configuration -> XMLReader, and 

Configurator -> XMLerator.

Included typedefs so that existing applications can simply include
XMLReader.hpp in place of configuration.hpp.


git-svn-id: https://svn.microneil.com/svn/CodeDweller/branches/adeniz_1@93 d34b734f-a00e-4b39-a726-e4eeb87269ab
adeniz_1
adeniz vor 9 Jahren
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  2. 763
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  3. 591
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// XMLReader.hpp
//
// (C) 2006 - 2009 MicroNeil Research Corporation.
// See http://www.codedweller.com for details.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
// Place, Suite 330, Boston, MA 02111-1307 USA
//

// What about this =============================================================

// The XMLReader module provides a platform for reading configuration files
// (or string data) containing well-formed xml and mapping that data to program
// variables.
// The idea is to provide the ability for an object or application to provide
// a modular "XMLReader" object that models a hierarchical collection of
// "settings" that can be represented easily in code and in xml.
//
// The following is an example model of a XMLReader in code and that same
// XMLReader fully populated in xml.
//
// The code might look like this...
//
// int IntValue, DefaultInt = 3;
// double DblValue, DefaultDbl = 3.14159;
// bool BooleanValue, DefaultBool = false;
// string StringValue, DefaultString = "NoStringHere";
//
// SpecialConfigurator : public XMLReaderHandler { // Create a special handler to build a list
// ...
// public:
//
// XMLReaderHandler& Startup(XMLReaderElement& E) { // This function returns a handy handler to
// return MyStartupXMLReaderHandler; // (re) initialize this handler ;-)
// }
//
// void Operator()() { // Each time the configurator is called
// ...
// }
//
// int Attribute1; // these items are interpreted and added
// double Attribute2; // to the list. A XMLReaderHandler COULD
// string Attribute3; // do something entirely different though ;-)
// string Contents;
// ...
// } Special;
//
// XMLReaderElement SampleConfig("SampleConfiguration"); // Define a sample config (doc element)
// SampleConfig // Populate the SampleConfig
// .atStartCall(Special.Startup())
// .Element("Integer", IntValue, DefaultInt).End() // Link an element to an int w/ default.
// .Element("Double", DblValue, DefaultDbl).End("Double") // Link an element to a dbl w/ default.
// .Element("String", StringValue, DefaultString).End("String") // Link an element to a string w/ default.
// .Element("ComplexElements") // Create a sub element.
// .Element("Complex1") // Sub element Complex1 has attributes.
// .Attribute("IntAtt", IntValue, DefaultInt) // Complex1 has an integer attribute.
// .Attribute("DblAtt", DblValue, DefaultDbl) // Complex1 has a dbl attribute.
// .Element("IntAtt", IntValue).End() // IntAtt can also be set by a sub element.
// .Element("DblAtt", DblValue).End() // DblAtt can also be set by a sub element.
// .End() // That's it for Complex1.
// .Element("Complex2") // Create the Complex2 sub element.
// .Attribute("C2I", IntValue, DefaultInt) // C2I attribute.
// .Attribute("C2D", DblValue) // C2D attribute - no default.
// .Attribute("C2S", StringValue, DefultString) // C2S attribute - string w/ default.
// .End("Complex2") // End of element throws if doesn't match.
// .Element("Complex3", Special.Contents) // Element 3 using a special configurator.
// .Attribute("A1", Special.Attribute1) // Set A1 and A2 and A3 and when the
// .Attribute("A2", Special.Attribute2) // element has been completed, Special()
// .Attribute("A3", Special.Attribute3) // will be called to record the entries.
// .atEndCall(Special) // Here's where we register the handler.
// .End() // Closing Complex3 to be ice.
// .End() // Closing ComplexElements to be nice.
// .End(); // Closing SampleConfiguration to be nice.
//
// The XML might look like this...
//
// <SampleConfiguration>
// <Integer>10</Integer>
// <Double>2.4</Double>
// <String>This is a sample string</String>
// <ComplexElements>
// <Complex1 IntAtt="4" DblAtt="2.1324">
// <IntAtt>24</IntAtt> <!-- changed IntAtt -->
// </Complex1>
// <Complex2 C2I='3' C2D='5.14' C2S='Some "string" we like' />
// <Complex3> stuff in here </Complex3>
// <Complex3> Another instance </Complex3>
// <Complex3> Each one gets passed to Special() on activation </Complex3>
// <Complex3> This way, Special() can build a list or some other </Complex3>
// <Complex3> interesting thing with all of these. </Complex3>
// <ComplexElements>
// </SampleConfiguration>
//

// Include This Header Once Only ===============================================

#ifndef XMLReader_included
#define XMLReader_included

#include <string>
#include <sstream>
#include <fstream>
#include <cstring>
#include <cstdlib>
#include <list>

namespace CodeDweller {

class XMLReaderElement; // Elements exist
class XMLReaderAttribute; // Attributes exist
class XMLReaderData; // Data exists
class XMLReaderTranslator; // Translators exist
class XMLReaderMnemonic; // Mnemonics exist
class XMLerator; // XMLerators exist

typedef XMLReaderElement ConfigurationElement;
typedef XMLReaderAttribute ConfigurationAttribute;
typedef XMLReaderData ConfigurationData;
typedef XMLReaderTranslator ConfigurationTranslator;
typedef XMLReaderMnemonic ConfigurationMnemonic;
typedef XMLerator Configurator;

class RawTranslator {
private:
int *IndexAssignment = 0;
int *EndexAssignment = 0;
std::string *RawDataAssignment = 0;
public:
void setRawDataAssignment(std::string &RawData);
void setIndexAssignment(int &Index, int &Endex);
void translate(int Index, int Endex, XMLReaderData &Data);
};

//// XMLReader Element /////////////////////////////////////////////////////
//
// Elements make up the core of a configuration. That is, a configuration is a
// tree of elements. Elements translate directly to well formed xml elements in
// a configuration file or string.

class XMLReaderElement {

private:

std::string myName; // Elements have a name.

// External important things I remember but don't touch...

XMLReaderElement* myParent; // They may have a parrent.

std::list<XMLerator*> myStartXMLerators; // Call these when we start Interpret()
std::list<XMLerator*> myEndXMLerators; // Call these when we finish Interpret()

// Internal / subordinate things I own and kill...

std::list<XMLReaderAttribute*> myAttributes; // They may have a list of attributes.
std::list<XMLReaderElement*> myElements; // They may have a list of sub-elements.
std::list<XMLReaderMnemonic*> myMnemonics; // They may have a list of mnemonics.
std::list<XMLReaderTranslator*> myTranslators; // They may have a list of translators.

RawTranslator myRawTranslator; // Provides entire element.

// During Interpret() operations we keep track of where we are seen...

int myLine; // Last line number I was seen on.
int myIndex; // Last char position I was seen on.
int myEndex; // Last char of element.
int myLength; // Last segment length.

bool myCleanFlag; // Keep track of initialization.

bool myInitOnInterpretFlag; // Initialize() at each Interpret()?

void runStartXMLerators(XMLReaderData& D); // Does what it says ;-)
void runEndXMLerators(XMLReaderData& D); // Does what it says ;-)

public:

XMLReaderElement(const char* Name); // Must be constructed with a name
XMLReaderElement(const std::string Name); // either c string or c++ string.

XMLReaderElement(const char* Name, XMLReaderElement& Parent); // Sub-elements are constructed with a
XMLReaderElement(const std::string Name, XMLReaderElement& Parent); // parrent.

// Upon desctruction an element will delete all subordinate objects:
// * All sub element objects.
// * All attribute objects.
// * All mnemonic objects.
// * All translator objects.
// It is important to use new when passing one of these objects to an
// element or attribute to prevent problems with the delete operation.
// NORMALLY these things would be created using factory methods on the
// element and attribute objects themselves - so be careful.
// It will not delete XMLerators - they must
// be deleted elsewhere because they may have been
// re-used and this element wouldn't know about it ;-)

~XMLReaderElement(); // The descrutor clears and deletes all!

// Elements can be probed for some simple, useful things.

std::string Name(); // Get the name of this element.
XMLReaderElement& Parent(); // Get the parent of this element.
XMLReaderElement& Parent(XMLReaderElement& newParent); // Set the parent of this element.

// Note - if there is no parent (an element is the root) then it will
// return a reference to itself when Parent() is called.

int Line(); // Get the last line number.
int Index(); // Get the last data position.
int Length(); // Get the last length.

// Elements can contain either data or sub-elements.

XMLReaderElement& Element(const char* Name); // Add a new sub element by c string name.
XMLReaderElement& Element(const std::string Name); // Add a new sub element by c++ string name.

//// Mapping element factory methods for convenience.
//// Root-Node elements are _usually_ empty and without attributes in xml
//// so we don't make any of that type of convenience constructor here.

// char* versions

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

// string versions

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

XMLReaderElement& RawData( // Copy entire element to
std::string &Element); // a string.

XMLReaderElement& RawIndex( // Copy indices of the entire
int &Index, int &Endex); // element.

// End methods for heading back up the tree at the end of an element.

class EndNameDoesNotMatch {}; // Throw when End(name) doesn't match.

XMLReaderElement& End(); // Return this element's parent.
XMLReaderElement& End(const char* Name); // Check the name and return the parent
XMLReaderElement& End(const std::string Name); // if the name is correct - or throw!

// Elements can have attributes.

XMLReaderAttribute& Attribute(const char* Name); // Add an attribute using a cstring.
XMLReaderAttribute& Attribute(const std::string Name); // Add an attribute using a c++ string.

//// Mapping Attribute factory methods for convenience.

// char* versions

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

// string versions

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

// Elements can Initialize() at each Interpret() call.

XMLReaderElement& setInitOnInterpret(); // Set the init on interpret flag.

// Elements can call external functions to aid in special operations
// such as building lists.

XMLReaderElement& atStartCall(XMLerator& Functor); // Add an atStart call-back to this element.
XMLReaderElement& atEndCall(XMLerator& Functor); // Add an atEnd call-back to this element.

// Extracting data from the element's contents is done with
// translators. A good set of primatives are built in, but the user
// can also make their own. If an Element is mapped to more than
// one then they are all called once the element's contents are
// collected. A translator takes the data provided by the element,
// converts it into the expected type, and sets one or more variables
// to the converted value. Usually - just one variable.

XMLReaderElement& mapTo(XMLReaderTranslator& newTranslator); // Add a Translator to this element.
XMLReaderElement& mapTo(std::string& x, std::string init = std::string("")); // Map to a string.
XMLReaderElement& mapTo(int& x, int init = 0, int radix = 0); // Map to an int.
XMLReaderElement& mapTo(double& x, double init = 0.0); // Map to a double.
XMLReaderElement& mapTo(bool& x, bool init = false); // Map to a boolean.

// An Element's contents may use some special mnemonics to make a
// XMLReader easier to understand and less error prone. When the
// contents match a mnemnoic then the translation of the mnemonic is
// passed to the Translators instead of the raw contents.

XMLReaderElement& Mnemonic(const char* name, const char* value); // Add a mnemonic using c strings.
XMLReaderElement& Mnemonic(const char* name, const std::string value); // Add a mnemonic using c & c++ strings.
XMLReaderElement& Mnemonic(const std::string name, const char* value); // Add a mnemonic using c++ & c strings.
XMLReaderElement& Mnemonic(const std::string name, const std::string value); // Add a mnemonic using c++ strings.

// The way data gets into an element tree is that it is Interpret()ed
// recursively. The data is loaded into a XMLReaderData object which
// is passed to the top Element. That element interpretes the data, moves
// the interpretation pointers, and passes the data on to it's subordinate
// elements in turn. They do the same recursively. When the last sub -
// element has had it's way with the data, the interpretation process is
// complete. The XMLReaderData object will contain the original data
// and a log of anything that happened during the interpretation process.
//
// Each time an element is asked to Interpret() data, it calls any atStart
// configurators, translates any attributes, then either translates it's
// contents or passes the data to it's children, then calls any atEnd
// configurators.
//
// To ensure that the correct default values are used the Initialize() is
// always called on all internal attributes and elements before any data is
// interpreted. To prevent this from being inefficient, a boolean flag is
// kept in each element to keep track of whether it is clean and if it is
// then the call to Initialize will simply return (skipping subordinate
// elements along the way).
//
// Interpret returns true if this object found itself at the current
// Data.Index and false if not. This helps keep the recursive parsing
// code simpler ;-)

void initialize(); // Reset all translators to defaults.

void notifyDirty(); // Set dirty (if translators change).

bool interpret(XMLReaderData& Data); // (re) Interpret this data.

};

//// XMLReader Attribute ///////////////////////////////////////////////////
//
// Attributes translate directly to well formed xml attributes (within the
// start tag of an element).

class XMLReaderAttribute {

private:

std::string myName; // Elements have a name.
XMLReaderElement& myParent; // They may have a parrent.

std::list<XMLReaderMnemonic*> myMnemonics; // They may have a list of mnemonics.
std::list<XMLReaderTranslator*> myTranslators; // They may have a list of translators.

int myLine; // Last line number I was seen on.
int myIndex; // Last char position I was seen on.
int myLength; // Last segment length.

public:

XMLReaderAttribute(const char* Name, XMLReaderElement& Parent); // Sub-elements are constructed with a
XMLReaderAttribute(const std::string Name, XMLReaderElement& Parent); // parrent.

// Attributes delete their Mnemonics and Translators when they go.
// See Elements for similar warnings about objects provided to
// this object... you must use new to be safe, or better yet - stick to
// the built in factory methods ;-)

~XMLReaderAttribute(); // Crush, Kill, Destroy!

// Attributes can be probed for some simple, useful things.

std::string Name(); // Get the name of this attribute.
XMLReaderElement& Parent(); // Get the parent of this attribute.
int Line(); // Get the last line number.
int Index(); // Get the last data position.
int Length(); // Get the last length.

void notifyDirty(); // Attributes use this when they change.

// For convenience in building configurations, an Attribute offers
// some call-through methods to it's parrent Element. This allows for
// clear, concise .method() coding that mimics an outline of the
// configuration structure.

//// For switching back to the parent element and adding new sub-elements.

XMLReaderElement& Element(const char* Name); // Add a new sub element by c string name.
XMLReaderElement& Element(const std::string Name); // Add a new sub element by c++ string name.

//// Mapping element factory methods for convenience.
//// Root-Node elements are _usually_ empty and without attributes in xml
//// so we don't make any of that type of convenience constructor here.

// char* versions

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderElement& Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

// string versions

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderElement& Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

// End methods for heading back up the tree at the end of an element.

XMLReaderElement& End(); // Return this element's parent.
XMLReaderElement& End(const char* Name); // Check the name and return the parent
XMLReaderElement& End(const std::string Name); // if the name is correct - or throw!

//// For adding new attributes to the parent element.

XMLReaderAttribute& Attribute(const char* Name); // Add an attribute using a cstring.
XMLReaderAttribute& Attribute(const std::string Name); // Add an attribute using a c++ string.

//// Mapping Attribute factory methods for convenience.

// char* versions

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

// string versions

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
XMLReaderTranslator& newTranslator); // Add a Translator to this element.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
std::string& x, std::string init = std::string("")); // Map to a string.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
int& x, int init = 0, int radix = 0); // Map to an int.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
double& x, double init = 0.0); // Map to a double.

XMLReaderAttribute& Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
bool& x, bool init = false); // Map to a boolean.

//// Set Init On Interprete for the parent element.

XMLReaderElement& setInitOnInterpret(); // Set the init on interpret flag.

//// For adding configurators to the parent element.

XMLReaderElement& atStartCall(XMLerator& Functor); // Add an atStart call-back to this element.
XMLReaderElement& atEndCall(XMLerator& Functor); // Add an atEnd call-back to this element.

// Of course, the most useful thing about attributes is that they can
// be mapped to variables using translators. The same as those that
// apply to the parent element's contents. Here they are for use on this
// attribute.

XMLReaderAttribute& mapTo(XMLReaderTranslator& newTranslator); // Add a Translator to this attribute.
XMLReaderAttribute& mapTo(std::string& x, std::string init = std::string("")); // Map to a string.
XMLReaderAttribute& mapTo(int& x, int init, int radix = 0); // Map to an int.
XMLReaderAttribute& mapTo(double& x, double init = 0.0); // Map to a double.
XMLReaderAttribute& mapTo(bool& x, bool init = false); // Map to a boolean.

// Attributes can have mnemonics just like elements.

XMLReaderAttribute& Mnemonic(const char* name, const char* value); // Add a mnemonic using a c string.
XMLReaderAttribute& Mnemonic(const char* name, const std::string value); // Add a mnemonic using c & c++ strings.
XMLReaderAttribute& Mnemonic(const std::string name, const char* value); // Add a mnemonic using c++ & c strings.
XMLReaderAttribute& Mnemonic(const std::string name, const std::string value); // Add a mnemonic using a c++ string.

// Attributes participate in the Interprete() task just like elements.

void initialize(); // Reset all translators to defaults.
bool interpret(XMLReaderData& Data); // (re) Interpret this data.

};

//// XMLReader Data ////////////////////////////////////////////////////////
//
// A XMLReaderData object holds on to the configuration source data and
// provideds a place to log any information about how the configuration was
// interpreted. It also creates and destroys a handy char[] to contain the
// data. To make this beastie easier to handle, we use the Named Constructor
// Idiom and hide the true constructor in the private section.

class XMLReaderData { // XMLReader Data Source
private:

char* myDataBuffer; // The actual data buffer.
int myBufferSize; // Size of the current buffer.
int myIndex; // The current interpretation index.
int myLine; // Current line number.

public:

XMLReaderData(const char* FileName); // Constructor from c string file name.
XMLReaderData(const std::string FileName); // Constructor from c++ string file name.
XMLReaderData(const char* Data, int Length); // Raw constructor from text buffer.

~XMLReaderData(); // Destroys the internal buffer etc.

char Data(int Index); // Returns char from Data[Index]
int Index(); // Reads the current Index.
int Index(int i); // Changes the current Index.
int Line(); // Reads the current Line number.
int addNewLines(int Count); // Increments the Line number.
std::string extract(int Index, int Endex) const ; // Return substring of buffer.

std::stringstream Log; // Convenient Interpret log.

};

//// XMLReader Translator //////////////////////////////////////////////////
//
// A Translator converts the contents provided to it in string form into some
// other data type. The object here is a prototype for that, followed by a
// collection of the basic translators used for built-in mapTo()s.

class XMLReaderTranslator { // Translators exist
public:
virtual ~XMLReaderTranslator(){}; // Stop No Virt Dtor warnings.
virtual void translate(const char* Value) = 0; // Pure virtual translator.
virtual void initialize() = 0; // Pure virtual initializer.
};

class StringTranslator : public XMLReaderTranslator {
private:
std::string& myVariable; // Variable to map.
std::string myInitializer; // Initial/Default value.

public:
StringTranslator( // Construct this with
std::string& Variable, // the variable to map,
std::string Inititializer); // and the default value.

void translate(const char* Value); // Provide a translation method.
void initialize(); // Provide an initialization method.
};

class IntegerTranslator : public XMLReaderTranslator {
private:
int& myVariable; // Variable to map.
int myInitializer; // Initial/Default value.
int myRadix; // Radix for strtol()

public:
IntegerTranslator( // Construct this with
int& Variable, // the variable to map,
int Inititializer, // and the default value.
int Radix); // For this one we also need a Radix.

void translate(const char* Value); // Provide a translation method.
void initialize(); // Provide an initialization method.
};

class DoubleTranslator : public XMLReaderTranslator {
private:
double& myVariable; // Variable to map.
double myInitializer; // Initial/Default value.

public:
DoubleTranslator( // Construct this with
double& Variable, // the variable to map,
double Inititializer); // and the default value.

void translate(const char* Value); // Provide a translation method.
void initialize(); // Provide an initialization method.
};

class BoolTranslator : public XMLReaderTranslator {
private:
bool& myVariable; // Variable to map.
bool myInitializer; // Initial/Default value.

public:
BoolTranslator( // Construct this with
bool& Variable, // the variable to map,
bool Inititializer); // and the default value.

void translate(const char* Value); // Provide a translation method.
void initialize(); // Provide an initialization method.
};

//// XMLReader Mnemonic ////////////////////////////////////////////////////
//
// A Mnemonic allows the actual contents of an element or attribute to be
// exchanged for a different "named" value to help eliminate "magic numbers"
// and "secret codes" from configurations. One way this might be used is to
// map an enumeration to the appropriate integer values, or things like YES and
// NO to boolean true and false (respectively) when turning on/off program
// options.

class XMLReaderMnemonic { // Mnemonics
private:
std::string myName; // What is the Mnemonic?
std::string myValue; // What is the translation?

public:
XMLReaderMnemonic(std::string Name, std::string Value); // To make one, provide both parts.
bool test(std::string Name); // Test to see if this Mnemonic matches.
std::string Value(); // If it does then we will need it's value.
};

//// XMLerator //////////////////////////////////////////////////////////////
//
// An XMLerator is a "functor" or "closure" or "callback" that can be used to
// support sophisticated interpretation options. The most basic and necessary
// of these is support for list building. Consider an object created to contain
// a list of records where each record might be represented as a collection of
// attributes and elements. The object would have data elements mapped to the
// attributes and elements in the configuration and then control elements which
// are functors for initializing the list and storing new entries as they are
// completed. The object here is a pure virtual prototype.

class XMLerator { // XMLerators exist
public:
virtual void operator()(XMLReaderElement& E, XMLReaderData& D) = 0; // Pure virtual configurator.
virtual ~XMLerator() {} // Virtual dtor keeps warnings away.
};

//// Include our inline methods ////////////////////////////////////////////////

#include "XMLReader.inline.hpp"

//// Utilities /////////////////////////////////////////////////////////////////

// SetTrueOnComplete XMLerator //////////////////////////////////////////////

class XMLeratorSetTrueOnComplete : public XMLerator { // XMLerator set's a boolean true.
private:
bool* myBoolean; // The boolean to set.
public:
XMLeratorSetTrueOnComplete(); // Must init to NULL for safety.
void setup(bool& Target); // Link to the target boolean.

void operator()(XMLReaderElement& E, XMLReaderData& D); // Handle the operation.
};

}
#endif

// End Of Include Only Once


+ 591
- 0
XMLReader.inline.hpp Datei anzeigen

@@ -0,0 +1,591 @@
// XMLReader.inline.hpp
//
// (C) 2006-2009 MicroNeil Research Corporation.
//
// This program is part of the MicroNeil Research Open Library Project. For
// more information go to http://www.microneil.com/OpenLibrary/index.html
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
// Place, Suite 330, Boston, MA 02111-1307 USA

// See XMLReader.hpp for details

//// XMLReader Element /////////////////////////////////////////////////////

inline XMLReaderElement::XMLReaderElement(const char* Name) : // Construct with a cstring.
myName(std::string(Name)),
myParent(NULL),
myLine(0),
myIndex(0),
myLength(0),
myCleanFlag(true),
myInitOnInterpretFlag(false) {
}

inline XMLReaderElement::XMLReaderElement(const std::string Name) : // Construct with a c++ string.
myName(Name),
myParent(NULL),
myLine(0),
myIndex(0),
myLength(0),
myCleanFlag(true),
myInitOnInterpretFlag(false) {
}

inline XMLReaderElement::XMLReaderElement( // Construct sub element w/ cstring.
const char* Name,
XMLReaderElement& Parent) :

myName(std::string(Name)),
myParent(&Parent),
myLine(0),
myIndex(0),
myLength(0),
myCleanFlag(true),
myInitOnInterpretFlag(false) {
}

inline XMLReaderElement::XMLReaderElement( // Construct sub element w/ string.
const std::string Name,
XMLReaderElement& Parent) :

myName(Name),
myParent(&Parent),
myLine(0),
myIndex(0),
myLength(0),
myCleanFlag(true),
myInitOnInterpretFlag(false) {
}

inline std::string XMLReaderElement::Name() { return myName; } // Get the name of this element.

inline XMLReaderElement& XMLReaderElement::Parent() { // Get the parrent of this element.
if(NULL != myParent) { // If I have a parent
return (*myParent); // then I dereference and return it.
} // If I don't have a parent
return (*this); // then I return myself.
}

inline XMLReaderElement& XMLReaderElement::Parent( // Set the parrent of this element.
XMLReaderElement& Parent) { // Given this parent
myParent = &Parent; // I take and store it's address
return (*myParent); // then dereference and return it.
}

inline int XMLReaderElement::Line() { return myLine; } // Get the last line number.

inline int XMLReaderElement::Index() { return myIndex; } // Get the last data position.

inline int XMLReaderElement::Length() { return myLength; } // Get the last length.

inline void XMLReaderElement::notifyDirty() { myCleanFlag = false; } // Attributes do this when they change.

inline XMLReaderElement& XMLReaderElement::Element(const char* Name) { // Add a new sub element by c string name.
return Element(std::string(Name)); // Use the string name version
}

inline XMLReaderElement& XMLReaderElement::Element(const std::string Name) { // Add a new sub element by c++ string name.
XMLReaderElement* N = new XMLReaderElement( // Create a new Element with the
Name, // name provided and
(*this)); // myself as the parent.

myElements.push_back(N); // Add it to the list.
return (*N); // Return the new element.
}

inline XMLReaderElement& XMLReaderElement::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator) { // Add a Translator to this element.
return Element(std::string(Name), newTranslator); // Use the string name version
}

inline XMLReaderElement& XMLReaderElement::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init) { // Map to a string.
return Element(std::string(Name), x, init); // Use the string name version
}

inline XMLReaderElement& XMLReaderElement::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init, int radix) { // Map to an int.
return Element(std::string(Name), x, init, radix); // Use the string name version
}

inline XMLReaderElement& XMLReaderElement::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init) { // Map to a double.
return Element(std::string(Name), x, init); // Use the string name version
}

inline XMLReaderElement& XMLReaderElement::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init) { // Map to a boolean.
return Element(std::string(Name), x, init); // Use the string name version
}

inline XMLReaderElement& XMLReaderElement::End() { // Return this element's parent.
return Parent(); // Borrow Parent()
}

inline XMLReaderElement& XMLReaderElement::End(const char* Name) { // Check the name and return the parent
return End(std::string(Name)); // Borrow End(string)
}

inline XMLReaderElement& XMLReaderElement::End(const std::string Name) { // if the name is correct - or throw!
if(0 != Name.compare(myName)) { // If Name is not myName
throw EndNameDoesNotMatch(); // throw an exception!
} // If the names match then
return Parent(); // return the parent.
}

inline XMLReaderAttribute& XMLReaderElement::Attribute( // Add an attribute using a cstring.
const char* Name) { // Given this cstring name
return Attribute(std::string(Name)); // Convert it to a string and borrow
} // Attribute(string)

inline XMLReaderAttribute& XMLReaderElement::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator) { // Add a Translator to this element.
return Attribute(std::string(Name), newTranslator); // Borrow the string name version
}

inline XMLReaderAttribute& XMLReaderElement::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init) { // Map to a string.
return Attribute(std::string(Name), x, init); // Borrow the string name version
}

inline XMLReaderAttribute& XMLReaderElement::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init, int radix) { // Map to an int.
return Attribute(std::string(Name), x, init); // Borrow the string name version
}

inline XMLReaderAttribute& XMLReaderElement::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init) { // Map to a double.
return Attribute(std::string(Name), x, init); // Borrow the string name version
}

inline XMLReaderAttribute& XMLReaderElement::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init) { // Map to a boolean.
return Attribute(std::string(Name), x, init); // Borrow the string name version
}

inline XMLReaderElement& XMLReaderElement::setInitOnInterpret() { // Set the init on interpret flag.
myInitOnInterpretFlag = true; // Set the flag.
return(*this); // Dereference and return self.
}

inline XMLReaderElement& XMLReaderElement::atStartCall( // Add an atStart call-back.
XMLerator& Functor) { // Given this Functor,
myStartXMLerators.push_back(&Functor); // add it to my atStart list then
return(*this); // dereference and return myself.
}

inline XMLReaderElement& XMLReaderElement::atEndCall( // Add an atEnd call-back.
XMLerator& Functor) { // Given this Functor,
myEndXMLerators.push_back(&Functor); // add it to my atEnd list then
return(*this); // dereference and return myself.
}

inline XMLReaderElement& XMLReaderElement::Mnemonic( // Add a mnemonic using c strings.
const char* name, const char* value) { // Given char* and char*
return Mnemonic(std::string(name), std::string(value)); // make strings and borrow that method.
}

inline XMLReaderElement& XMLReaderElement::Mnemonic( // Add a mnemonic using mixed strings.
const char* name, const std::string value) { // Given char* and string
return Mnemonic(std::string(name), value); // make strings and borrow that method.
}

inline XMLReaderElement& XMLReaderElement::Mnemonic( // Add a mnemonic using mixed strings.
const std::string name, const char* value) { // Given string and char*
return Mnemonic(name, std::string(value)); // make strings and borrow that method.
}

inline XMLReaderElement& XMLReaderElement::Mnemonic( // Add a mnemonic using c++ strings.
const std::string name, const std::string value) { // Givent string and string
XMLReaderMnemonic* N = // Create a new Mnemonic
new XMLReaderMnemonic(name, value); // using the values provided,
myMnemonics.push_back(N); // add it to my list, then
return(*this); // dereference and return myself.
}

//// XMLReader Attribute ///////////////////////////////////////////////////

inline XMLReaderAttribute::XMLReaderAttribute( // Attributes are constructed with a
const char* Name, XMLReaderElement& Parent) : // Name and a Parent.
myName(std::string(Name)), // We convert the name to a string.
myParent(Parent), // We just grab the parent.
myLine(0), // Everything else gets zeroed.
myIndex(0),
myLength(0) {
}

inline XMLReaderAttribute::XMLReaderAttribute( // Attributes are constrictued with a
const std::string Name, XMLReaderElement& Parent) : // Name and a Parent.
myName(Name), // We grab them and zero the rest.
myParent(Parent),
myLine(0),
myIndex(0),
myLength(0) {
}

inline std::string XMLReaderAttribute::Name() { // Get the name of this attribute.
return myName;
}

inline XMLReaderElement& XMLReaderAttribute::Parent() { // Get the parent of this attribute.
return myParent;
}

inline int XMLReaderAttribute::Line() { // Get the last line number.
return myLine;
}

inline int XMLReaderAttribute::Index() { // Get the last data position.
return myIndex;
}

inline int XMLReaderAttribute::Length() { // Get the last length.
return myLength;
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Add a new sub element by c string name.
const char* Name) {
return myParent.Element(Name);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Add a new sub element by c++ string name.
const std::string Name) {
return myParent.Element(Name);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator) { // Add a Translator to this element.
return myParent.Element(Name, newTranslator);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init) { // Map to a string.
return myParent.Element(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init, int radix) { // Map to an int.
return myParent.Element(Name, x, init, radix);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init) { // Map to a double.
return myParent.Element(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init) { // Map to a boolean.
return myParent.Element(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
XMLReaderTranslator& newTranslator) { // Add a Translator to this element.
return myParent.Element(Name, newTranslator);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
std::string& x, std::string init) { // Map to a string.
return myParent.Element(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
int& x, int init, int radix) { // Map to an int.
return myParent.Element(Name, x, init, radix);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
double& x, double init) { // Map to a double.
return myParent.Element(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::Element( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
bool& x, bool init) { // Map to a boolean.
return myParent.Element(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::End() { // Return this element's parent.
return myParent.End();
}

inline XMLReaderElement& XMLReaderAttribute::End(const char* Name) { // Check the name and return the parent
return myParent.End(Name);
}

inline XMLReaderElement& XMLReaderAttribute::End(const std::string Name) { // if the name is correct - or throw!
return myParent.End(Name);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Add an attribute using a cstring.
const char* Name) {
return myParent.Attribute(Name);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Add an attribute using a c++ string.
const std::string Name) {
return myParent.Attribute(Name);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
XMLReaderTranslator& newTranslator) { // Add a Translator to this element.
return myParent.Attribute(Name, newTranslator);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
std::string& x, std::string init) { // Map to a string.
return myParent.Attribute(Name, x, init);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
int& x, int init, int radix) { // Map to an int.
return myParent.Attribute(Name, x, init, radix);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
double& x, double init) { // Map to a double.
return myParent.Attribute(Name, x, init);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const char* Name, // requires a name, of course,
bool& x, bool init) { // Map to a boolean.
return myParent.Attribute(Name, x, init);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
XMLReaderTranslator& newTranslator) { // Add a Translator to this element.
return myParent.Attribute(Name, newTranslator);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
std::string& x, std::string init) { // Map to a string.
return myParent.Attribute(Name, x, init);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
int& x, int init, int radix) { // Map to an int.
return myParent.Attribute(Name, x, init, radix);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
double& x, double init) { // Map to a double.
return myParent.Attribute(Name, x, init);
}

inline XMLReaderAttribute& XMLReaderAttribute::Attribute( // Mapping factory for convenience,
const std::string Name, // requires a name, of course,
bool& x, bool init) { // Map to a boolean.
return myParent.Attribute(Name, x, init);
}

inline XMLReaderElement& XMLReaderAttribute::setInitOnInterpret() { // Set the init on interpret flag.
return myParent.setInitOnInterpret();
}

inline XMLReaderElement& XMLReaderAttribute::atStartCall( // Add an atStart call-back to this element.
XMLerator& Functor) {
return myParent.atStartCall(Functor);
}

inline XMLReaderElement& XMLReaderAttribute::atEndCall( // Add an atEnd call-back to this element.
XMLerator& Functor) {
return myParent.atEndCall(Functor);
}

inline XMLReaderAttribute& XMLReaderAttribute::Mnemonic( // Add a mnemonic using c strings.
const char* name, const char* value) { // Given char* and char*
return Mnemonic(std::string(name), std::string(value)); // make strings and borrow that method.
}

inline XMLReaderAttribute& XMLReaderAttribute::Mnemonic( // Add a mnemonic using mixed strings.
const char* name, const std::string value) { // Given char* and string
return Mnemonic(std::string(name), value); // make strings and borrow that method.
}

inline XMLReaderAttribute& XMLReaderAttribute::Mnemonic( // Add a mnemonic using mixed strings.
const std::string name, const char* value) { // Given string and char*
return Mnemonic(name, std::string(value)); // make strings and borrow that method.
}

inline XMLReaderAttribute& XMLReaderAttribute::Mnemonic( // Add a mnemonic using c++ strings.
const std::string name, const std::string value) { // Givent string and string
XMLReaderMnemonic* N = // Create a new Mnemonic
new XMLReaderMnemonic(name, value); // using the values provided,
myMnemonics.push_back(N); // add it to my list, then
return(*this); // dereference and return myself.
}

//// XMLReader Data ////////////////////////////////////////////////////////

inline char XMLReaderData::Data(int Index) { // Returns char from Data[Index]
if(0 > Index || Index >= myBufferSize) { // Check that index is in range
return 0; // and return 0 if it is not.
} // If Index is within range then
return myDataBuffer[Index]; // return the byte requested.
}

inline int XMLReaderData::Index() { // Reads the current Index.
return myIndex;
}

inline int XMLReaderData::Index(int i) { // Changes the current Index.
if(0 > i || i >= myBufferSize) { // If i is out of range then
return myIndex; // return the current Index unchanged.
} // If i is within range then
myIndex = i; // change the Index to i and
return myIndex; // return the changed Index.
}

inline int XMLReaderData::Line() { // Reads the current Line number.
return myLine;
}

inline int XMLReaderData::addNewLines(int Count) { // Increments the Line number.
myLine += Count; // Add the number of new lines.
return myLine; // Return the current Line number.
}

//// XMLReader Translator //////////////////////////////////////////////////

inline StringTranslator::StringTranslator( // Construct this with
std::string& Variable, // the variable to map,
std::string Initializer) : // and the default value.
myVariable(Variable),
myInitializer(Initializer) {
}

inline void StringTranslator::translate(const char* Value) { // Provide a translation method.
myVariable = std::string(Value); // String to String = simple copy.
}

inline void StringTranslator::initialize() { // Provide an initialization method.
myVariable = myInitializer; // Revert to the initializer value.
}

inline IntegerTranslator::IntegerTranslator( // Construct this with
int& Variable, // the variable to map,
int Initializer, // and the default value.
int Radix) : // For this one we also need a Radix.
myVariable(Variable),
myInitializer(Initializer),
myRadix(Radix) {
}

inline void IntegerTranslator::translate(const char* Value) { // Provide a translation method.
char* dummy; // Throw away ptr for strtol().
myVariable = strtol(Value, &dummy, myRadix); // Convert the string w/ strtol().
}

inline void IntegerTranslator::initialize() { // Provide an initialization method.
myVariable = myInitializer; // Revert to the initializer value.
}

inline DoubleTranslator::DoubleTranslator( // Construct this with
double& Variable, // the variable to map,
double Initializer) : // and the default value.
myVariable(Variable),
myInitializer(Initializer) {
}

inline void DoubleTranslator::translate(const char* Value) { // Provide a translation method.
char* dummy; // Throw away ptr for strtod().
myVariable = strtod(Value, &dummy); // Convert the string w/ strtod().
}

inline void DoubleTranslator::initialize() { // Provide an initialization method.
myVariable = myInitializer; // Revert to the initializer value.
}

inline BoolTranslator::BoolTranslator( // Construct this with
bool& Variable, // the variable to map,
bool Initializer) : // and the default value.
myVariable(Variable),
myInitializer(Initializer) {
}

inline void BoolTranslator::translate(const char* Value) { // Provide a translation method.
if(
(0 == strcmp(Value,"on")) ||
(0 == strcmp(Value,"true")) || // on, true, yes, and 1 are
(0 == strcmp(Value, "yes")) || // interpreted as a boolean true.
(0 == strcmp(Value, "1"))
) {
myVariable = true;
} else { // Anything else is interpreted as
myVariable = false; // boolean false.
}
}

inline void BoolTranslator::initialize() { // Provide an initialization method.
myVariable = myInitializer; // Revert to the initializer value.
}

inline void RawTranslator::setRawDataAssignment(std::string &RawData) {
RawDataAssignment = &RawData;
}

inline void RawTranslator::setIndexAssignment(int &Index, int &Endex) {
IndexAssignment = &Index;
EndexAssignment = &Endex;
}

inline void RawTranslator::translate(int Index, int Endex, XMLReaderData &Data) {
if (0 != RawDataAssignment) *RawDataAssignment = Data.extract(Index, Endex);
if (0 != IndexAssignment) *IndexAssignment = Index;
if (0 != EndexAssignment) *EndexAssignment = Endex;
}

//// XMLReader Mnemonic ////////////////////////////////////////////////////

inline XMLReaderMnemonic::XMLReaderMnemonic( // To make one, provide both parts.
std::string Name, std::string Value) :
myName(Name),
myValue(Value) {
}

inline bool XMLReaderMnemonic::test(std::string Name) { // Test to see if this Mnemonic matches.
return (0 == Name.compare(myName)); // Return true if Name and myName match.
}

inline std::string XMLReaderMnemonic::Value() { // If it does then we will need it's value.
return myValue;
}

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