cantera/include/cantera/base/xml.h
2016-05-03 15:03:51 -04:00

716 lines
25 KiB
C++

/**
* @file xml.h
* Classes providing support for XML data files. These classes
* implement only those aspects of XML required to read, write, and
* manipulate CTML data files.
*/
// Copyright 2001 California Institute of Technology
#ifndef CT_XML_H
#define CT_XML_H
#include "ctexceptions.h"
#include "global.h"
//@{
#define XML_INDENT 4
//@}
namespace Cantera
{
//! Class XML_Reader reads an XML file into an XML_Node object.
/*!
* Class XML_Reader is designed for internal use.
*/
class XML_Reader
{
public:
//! Sole Constructor for the XML_Reader class
/*!
* @param input Reference to the istream object containing the XML file
*/
XML_Reader(std::istream& input);
//! Read a single character from the input stream and returns it
/*!
* All low level reads occur through this function. The function also keeps
* track of the line numbers.
*
* @param ch Character to be returned.
*/
void getchr(char& ch);
//! Searches a string for the first occurrence of a valid quoted string.
/*!
* Quotes can start with either a single quote or a double quote, but must
* also end with the same type. Quotes may be commented out by preceding
* with a backslash character, '\\'.
*
* @param aline This is the input string to be searched
* @param rstring Return value of the string that is found.
* The quotes are stripped from the string.
* @returns the integer position just after the quoted string.
*/
int findQuotedString(const std::string& aline, std::string& rstring) const;
//! parseTag parses XML tags, i.e., the XML elements that are in between
//! angle brackets.
/*!
* @param tag Tag to be parsed - input
* @param name Output string containing name of the XML
* @param[out] attribs map of attribute name and attribute value
*/
void parseTag(const std::string& tag, std::string& name,
std::map<std::string, std::string>& attribs) const;
//! Reads an XML tag into a string
/*!
* This function advances the input streams pointer
*
* @param attribs map of attribute name and attribute value - output
* @return Output string containing name of the XML
*/
std::string readTag(std::map<std::string, std::string>& attribs);
//! Return the value portion of an XML element
/*!
* This function advances the input streams pointer
*/
std::string readValue();
protected:
//! Input stream containing the XML file
std::istream& m_s;
public:
//! Line count
int m_line;
};
//! Class XML_Node is a tree-based representation of the contents of an XML file
/*!
* There are routines for adding to the tree, querying and searching the tree,
* and for writing the tree out to an output file.
*/
class XML_Node
{
public:
//! Constructor for XML_Node, representing a tree structure
/*!
* @param nm Name of the node.
* @param parent Pointer to the parent for this node in the tree.
* A value of 0 indicates this is the top of the tree.
*/
explicit XML_Node(const std::string& nm="--", XML_Node* const parent=0);
XML_Node(const XML_Node& right);
XML_Node& operator=(const XML_Node& right);
virtual ~XML_Node();
//! Add a child node to the current node containing a comment
/*!
* Child node will have the name, comment.
*
* @param comment Content of the comment
*/
void addComment(const std::string& comment);
//! Merge an existing node as a child node to the current node
/*!
* This will merge an XML_Node as a child to the current node. Note, this
* actually adds the node. Therefore, the current node is changed. There is
* no copy made of the child node. The child node should not be deleted in
* the future
*
* @param node Reference to a child XML_Node object
* @returns a reference to the added child node
*/
XML_Node& mergeAsChild(XML_Node& node);
// Add a child node to the current node by making a copy of an existing node
// tree
/*
* This will add an XML_Node as a child to the current node. Note, this
* actually adds the node. Therefore, node is changed. A copy is made of the
* underlying tree
*
* @param node Reference to a child XML_Node object
* @returns a reference to the added node
*/
XML_Node& addChild(const XML_Node& node);
//! Add a child node to the current node with a specified name
/*!
* This will add an XML_Node as a child to the current node.
* The node will be blank except for the specified name.
*
* @param sname Name of the new child
* @returns a reference to the added node
*/
XML_Node& addChild(const std::string& sname);
//! Add a child node to the current XML node, and at the same time add a
//! value to the child
/*!
* Resulting XML string:
*
* <name> value </name>
*
* @param name Name of the child XML_Node object
* @param value Value of the XML_Node - string
* @returns a reference to the created child XML_Node object
*/
XML_Node& addChild(const std::string& name, const std::string& value);
//! Add a child node to the current XML node, and at the same time add a
//! formatted value to the child
/*!
* This version supplies a formatting string (printf format) to the output
* of the value.
*
* Resulting XML string:
*
* <name> value </name>
*
* @param name Name of the child XML_Node object
* @param value Value of the XML_Node - double.
* @param fmt Format of the output for value
* @returns a reference to the created child XML_Node object
*/
XML_Node& addChild(const std::string& name, const doublereal value,
const std::string& fmt="%g");
//! Remove a child from this node's list of children
/*!
* This function removes an XML_Node from the children of this node.
*
* @param node Pointer to the node to be removed. Note, this node
* isn't modified in any way.
*/
void removeChild(const XML_Node* const node);
//! Modify the value for the current node
/*!
* This functions fills in the m_value field of the current node
*
* @param val string Value that the node will be assigned
*/
void addValue(const std::string& val);
//! Modify the value for the current node
/*!
* This functions fills in the m_value field of the current node
* with a formatted double value
*
* @param val double Value that the node will be assigned
* @param fmt Format of the printf string conversion of the double.
* Default is "%g". Must be less than 63 chars
*/
void addValue(const doublereal val, const std::string& fmt="%g");
//! Return the value of an XML node as a string
/*!
* This is a simple accessor routine
*/
std::string value() const;
//! Return the value of an XML child node as a string
/*!
* @param cname Name of the child node to the current node, for which you
* want the value
*/
std::string value(const std::string& cname) const;
//! The Overloaded parenthesis operator with one augment
//! returns the value of an XML child node as a string
/*!
* @param cname Name of the child node to the current node, for which you
* want the value
*/
std::string operator()(const std::string& cname) const;
//! Return the value of an XML node as a single double
/*!
* This accesses the value string, and then tries to interpret it as a
* single double value.
*/
doublereal fp_value() const;
//! Return the value of an XML node as a single int
/*!
* This accesses the value string, and then tries to interpret it as a
* single int value.
*/
integer int_value() const;
//! Add or modify an attribute of the current node
/*!
* This functions fills in the m_value field of the current node
* with a string value
*
* @param attrib String name for the attribute to be assigned
* @param value String value that the attribute will have
*/
void addAttribute(const std::string& attrib, const std::string& value);
//! Add or modify an attribute to the double, value
/*!
* This functions fills in the attribute field, named attrib,
* with the double value, value. A formatting string is used.
*
* @param attrib String name for the attribute to be assigned
* @param value double Value that the node will be assigned
* @param fmt Format of the printf string conversion of the double.
* Default is "%g".
*/
void addAttribute(const std::string& attrib, const doublereal value,
const std::string& fmt="%g");
//! Add an integer attribute
/*!
* @param attrib String name for the attribute to be assigned
* @param value int Value that the node will be assigned
*/
void addAttribute(const std::string& attrib, int value);
//! Add an unsigned integer attribute
/*!
* @param attrib String name for the attribute to be assigned
* @param value int Value that the node will be assigned
*/
void addAttribute(const std::string& attrib, size_t value);
//! The operator[] is overloaded to provide a lookup capability
//! on attributes for the current XML element.
/*!
* For example
* xmlNode["id"]
* will return the value of the attribute "id" for the current
* XML element. It will return the blank std::string if there isn't
* an attribute with that name.
*
* @param attr attribute string to look up
* @returns a string representing the value of the attribute within the XML
* node. If there is no attribute with the given name, it returns
* the null string.
*/
std::string operator[](const std::string& attr) const;
//! Function returns the value of an attribute
/*!
* This function searches the attributes vector for the attribute named
* 'attr'. If a match is found, the attribute value is returned as a
* string. If no match is found, the empty string is returned.
*
* @param attr String containing the attribute to be searched for.
* @return If a match is found, the attribute value is returned as a
* string. If no match is found, the empty string is
* returned.
*/
std::string attrib(const std::string& attr) const;
//! Clear the current node and everything under it
/*!
* The value, attributes and children are all zeroed. The name and the
* parent information is kept.
*/
void clear();
private:
//! Returns a changeable value of the attributes map for the current node
/*!
* Note this is a simple accessor routine. And, it is a private function.
* It's used in some internal copy and assignment routines
*/
std::map<std::string,std::string>& attribs();
public:
//! Returns an unchangeable value of the attributes map for the current node
const std::map<std::string,std::string>& attribsConst() const;
//! Set the line number
/*!
* @param n the member data m_linenum is set to n
*/
void setLineNumber(const int n);
//! Return the line number
int lineNumber() const;
//! Returns a pointer to the parent node of the current node
XML_Node* parent() const;
//! Sets the pointer for the parent node of the current node
/*!
* @param p Pointer to the parent node
* @returns the pointer p
*/
XML_Node* setParent(XML_Node* const p);
//! Tests whether the current node has a child node with a particular name
/*!
* @param ch Name of the child node to test
* @returns true if the child node exists, false otherwise.
*/
bool hasChild(const std::string& ch) const;
//! Tests whether the current node has an attribute with a particular name
/*!
* @param a Name of the attribute to test
* @returns true if the attribute exists, false otherwise.
*/
bool hasAttrib(const std::string& a) const;
//! Returns the name of the XML node
/*!
* The name is the XML node is the XML node name
*/
std::string name() const {
return m_name;
}
//! Sets the name of the XML node
/*!
* @param name_ The name of the XML node
*/
void setName(const std::string& name_) {
m_name = name_;
}
//! Return the id attribute, if present
/*!
* Returns the id attribute if present. If not it return the empty string
*/
std::string id() const;
//! Return a changeable reference to the n'th child of the current node
/*!
* @param n Number of the child to return
*/
XML_Node& child(const size_t n) const;
//! Return an unchangeable reference to the vector of children of the current node
/*!
* Each of the individual XML_Node child pointers, however, is to a
* changeable XML node object.
*/
const std::vector<XML_Node*>& children() const;
//! Return the number of children
/*!
* @param discardComments If true comments are discarded when adding up the
* number of children. Defaults to false.
*/
size_t nChildren(bool discardComments = false) const;
//! Boolean function indicating whether a comment
bool isComment() const;
//! Require that the current XML node have an attribute named by the first
//! argument, a, and that this attribute have the the string value listed
//! in the second argument, v.
/*!
* @param a attribute name
* @param v required value of the attribute
*
* If the condition is not true, an exception is thrown
*/
void _require(const std::string& a, const std::string& v) const;
//! This routine carries out a recursive search for an XML node based
//! on both the XML element name and the attribute ID.
/*!
* If exact matches are found for both fields, the pointer
* to the matching XML Node is returned.
*
* The ID attribute may be defaulted by setting it to "". In this case the
* pointer to the first XML element matching the name only is returned.
*
* @param nameTarget Name of the XML Node that is being searched for
* @param idTarget "id" attribute of the XML Node that the routine
* looks for
* @returns the pointer to the XML node that fits the criteria
*
* @internal
* This algorithm does a lateral search of first generation children
* first before diving deeper into each tree branch.
*/
XML_Node* findNameID(const std::string& nameTarget,
const std::string& idTarget) const;
//! This routine carries out a search for an XML node based
//! on both the XML element name and the attribute ID and an integer index.
/*!
* If exact matches are found for all fields, the pointer
* to the matching XML Node is returned. The search is only carried out on
* the current element and the child elements of the current element.
*
* The "id" attribute may be defaulted by setting it to "". In this case the
* pointer to the first XML element matching the name only is returned.
*
* @param nameTarget Name of the XML Node that is being searched for
* @param idTarget "id" attribute of the XML Node that the routine
* looks for
* @param index Integer describing the index. The index is an
* attribute of the form index = "3"
* @returns the pointer to the XML node that fits the criteria
*/
XML_Node* findNameIDIndex(const std::string& nameTarget,
const std::string& idTarget, const int index) const;
//! This routine carries out a recursive search for an XML node based
//! on the XML element attribute, "id"
/*!
* If exact match is found, the pointer to the matching XML Node is
* returned. If not, 0 is returned.
*
* The ID attribute may be defaulted by setting it to "". In this case the
* pointer to the first XML element matching the name only is returned.
*
* @param id "id" attribute of the XML Node that the routine looks for
* @param depth Depth of the search.
* @returns the pointer to the XML node that fits the criteria
*
* @internal
* This algorithm does a lateral search of first generation children
* first before diving deeper into each tree branch.
*/
XML_Node* findID(const std::string& id, const int depth=100) const;
//! This routine carries out a recursive search for an XML node based
//! on an attribute of each XML node
/*!
* If exact match is found with respect to the attribute name and value of
* the attribute, the pointer to the matching XML Node is returned. If
* not, 0 is returned.
*
* @param attr Attribute of the XML Node that the routine looks for
* @param val Value of the attribute
* @param depth Depth of the search. A value of 1 means that only the
* immediate children are searched.
* @returns the pointer to the XML node that fits the criteria
*/
XML_Node* findByAttr(const std::string& attr, const std::string& val,
int depth = 100000) const;
//! This routine carries out a recursive search for an XML node based
//! on the name of the node.
/*!
* If exact match is found with respect to XML_Node name, the pointer to the
* matching XML Node is returned. If not, 0 is returned. This is the const
* version of the routine.
*
* @param nm Name of the XML node
* @param depth Depth of the search. A value of 1 means that only the
* immediate children are searched.
* @returns the pointer to the XML node that fits the criteria
*/
const XML_Node* findByName(const std::string& nm, int depth = 100000) const;
//! This routine carries out a recursive search for an XML node based
//! on the name of the node.
/*!
* If exact match is found with respect to XML_Node name, the pointer
* to the matching XML Node is returned. If not, 0 is returned.
* This is the non-const version of the routine.
*
* @param nm Name of the XML node
* @param depth Depth of the search. A value of 1 means that only the
* immediate children are searched.
* @returns the pointer to the XML node that fits the criteria
*/
XML_Node* findByName(const std::string& nm, int depth = 100000);
//! Get a vector of pointers to XML_Node containing all of the children
//! of the current node which match the given name
/*!
* @param name Name of the XML_Node children to search for
* @return vector of pointers to child XML_Nodes with the matching name
*/
std::vector<XML_Node*> getChildren(const std::string& name) const;
//! Return a changeable reference to a child of the current node, named by
//! the argument
/*!
* Note the underlying data allows for more than one XML element with the
* same name. This routine returns the first child with the given name.
*
* @param loc Name of the child to return
*/
XML_Node& child(const std::string& loc) const;
//! Write the header to the XML file to the specified ostream
/*!
* @param s ostream to write the output to
*/
void writeHeader(std::ostream& s);
//! Write an XML subtree to an output stream.
/*!
* This is a wrapper around the static routine write_int(). All this does
* is add an endl on to the output stream. write_int() is fine, but the
* last endl wasn't being written.
*
* @param s ostream to write to
* @param level Indentation level to work from
* @param numRecursivesAllowed Number of recursive calls allowed
*/
void write(std::ostream& s, const int level = 0, int numRecursivesAllowed = 60000) const;
//! Return the root of the current XML_Node tree
/*!
* Returns a reference to the root of the current XML tree
*/
XML_Node& root() const;
//! Set the root XML_Node value within the current node
/*!
* @param root Value of the root XML_Node.
*/
void setRoot(const XML_Node& root);
//! Populate the XML tree from an input file
void build(const std::string& filename);
//! Main routine to create an tree-like representation of an XML file
/*!
* Given an input stream, this routine will read matched XML tags
* representing the ctml file until an EOF is read from the file. This
* routine is called by the root XML_Node object.
*
* @param f Input stream containing the ascii input file
* @param filename Name of the input file, used in error messages
*/
void build(std::istream& f, const std::string& filename="[unknown]");
//! Copy all of the information in the current XML_Node tree into the
//! destination XML_Node tree, doing a union operation as we go
/*!
* Note this is a const function because the current XML_Node and its
* children isn't altered by this operation. copyUnion() doesn't duplicate
* existing entries in the destination XML_Node tree.
*
* @param node_dest This is the XML node to receive the information
*/
void copyUnion(XML_Node* const node_dest) const;
//! Copy all of the information in the current XML_Node tree into the
//! destination XML_Node tree, doing a complete copy as we go.
/*!
* Note this is a const function because the current XML_Node and its
* children isn't altered by this operation.
*
* @param node_dest This is the XML node to receive the information
*/
void copy(XML_Node* const node_dest) const;
//! Set the lock for this node and all of its children
void lock();
//! Unset the lock for this node and all of its children
void unlock();
private:
//! Write an XML subtree to an output stream.
/*!
* This is the main recursive routine. It doesn't put a final endl on. This
* is fixed up in the public method. A method to only write out a limited
* amount of the XML tree has been added.
*
* @param s ostream to write to
* @param level Indentation level to work from
* @param numRecursivesAllowed Number of recursive calls allowed
*/
void write_int(std::ostream& s, int level = 0, int numRecursivesAllowed = 60000) const;
protected:
//! XML node name of the node.
/*!
* For example, if we were in the XML_Node where
*
* <phase dim="3" id="gas">
* </phase>
*
* Then, this string would be equal to "phase". "dim" and "id" are
* attributes of the XML_Node.
*/
std::string m_name;
//! Value of the XML node
/*!
* This is the string contents of the XML node. For example. The XML node
* named eps:
*
* <eps>
* valueString
* </eps>
*
* has a m_value string containing "valueString".
*/
std::string m_value;
//! Name of the file from which this XML node was read. Only populated for
//! the root node.
std::string m_filename;
//! Map containing an index between the node name and the
//! pointer to the node
/*!
* m_childindex[node.name()] = XML_Node *pointer
*
* This object helps to speed up searches.
*/
std::multimap<std::string, XML_Node*> m_childindex;
//! Storage of attributes for a node
/*!
* m_attribs[attribName] = attribValue
*/
std::map<std::string, std::string> m_attribs;
//! Pointer to the parent XML_Node for the current node
/*!
* Note, the top node has a parent value of 0
*/
XML_Node* m_parent;
//! Pointer to the root XML_Node for the current node
/*!
* Note, the top node has a root value equal to itself
*/
XML_Node* m_root;
//! Lock for this node
/*!
* Currently, unimplemented functionality. If locked,
* it means you can't delete this node.
*/
bool m_locked;
//! Vector of pointers to child nodes
std::vector<XML_Node*> m_children;
//! True if the current node is a comment node
bool m_iscomment;
//! The member data m_linenum
/*!
* Currently, unimplemented functionality
*/
int m_linenum;
};
//! Search an XML_Node tree for a named phase XML_Node
/*!
* Search for a phase Node matching a name.
*
* @param root Starting XML_Node* pointer for the search
* @param phaseName Name of the phase to search for
* @returns the XML_Node pointer if the phase is found. If the phase is not
* found, it returns 0
*/
XML_Node* findXMLPhase(XML_Node* root, const std::string& phaseName);
}
#endif