Cantera  2.4.0
Input File Handling

## Classes

class  Unit
Unit conversion utility. More...

## Functions

Add a directory to the data file search path. More...

std::string findInputFile (const std::string &name)
Find an input file. More...

Get the Cantera data directories. More...

void setDefaultDirectories ()
Set the default directories for input files. More...

void ct2ctml (const char *file, const int debug=0)
Convert a cti file into a ctml file. More...

std::string ct2ctml_string (const std::string &file)
Get a string with the ctml representation of a cti file. More...

std::string ct_string2ctml_string (const std::string &cti)
Get a string with the ctml representation of a cti input string. More...

std::string findInputFile (const std::string &name)
Find an input file. More...

Add a directory to the data file search path. More...

Get the Cantera data directories. More...

string canteraRoot ()
Returns root directory where Cantera is installed. More...

bool buildSolutionFromXML (XML_Node &root, const std::string &id, const std::string &nm, ThermoPhase *th, Kinetics *kin)
Build a single-phase ThermoPhase object with associated kinetics mechanism. More...

ThermoPhasenewPhase (XML_Node &phase)
Create a new ThermoPhase object and initializes it according to the XML tree. More...

## Detailed Description

The properties of phases and interfaces are specified in text files. These procedures handle various aspects of reading these files.

For input files not specified by an absolute pathname, Cantera searches for input files along a path that includes platform-specific default locations, and possibly user-specified locations.

The current directory (".") is always searched first. Then, on Windows, the registry is checked to find the Cantera installation directory, and the 'data' subdirectory of the installation directory will be added to the search path.

On the Mac, directory '/Applications/Cantera/data' is added to the search path.

On any platform, if environment variable CANTERA_DATA is set to a directory name or a list of directory names separated with the OS-dependent path separator (i.e. ";" on Windows, ":" elsewhere), then these directories will be added to the search path.

Finally, the location where the data files were installed when Cantera was built is added to the search path.

There are currently two different types of input files within Cantera:

• CTI: A human-readable input file written using Python syntax which defines species, phases, and reactions, and contains thermodynamic, chemical kinetic, and transport data needed by Cantera. Some options for non-ideal equations of state available in the CTML format have not yet been implemented for the CTI format.
• CTML: This is an XML file laid out in such a way that Cantera can interpret the contents directly. Given a file in CTI format, Cantera will convert the CTI file into the CTML format on-the-fly using a Python script (ctml_writer). This process is done in-memory without writing any new files to disk. Explicit use of the CTML format is not recommended unless using features not available in CTI or working on a computer where Python is not available.

Cantera provides a converter (ck2cti) for converting Chemkin-format gas-phase mechanisms to the CTI format.

Other input routines in other modules:

importKinetics()

## Function Documentation

Add a directory to the data file search path.

Parameters
 dir String name for the directory to be added to the search path

Definition at line 374 of file application.cpp.

## ◆ findInputFile() [1/2]

 std::string findInputFile ( const std::string & name )

Find an input file.

This routine will search for a file in the default locations specified for the application. See the routine setDefaultDirectories() listed above.

The default set of directories specified for the application will be searched if a '/' or an '\' is not found in the name. If either is found then a relative path name is presumed, and the default directories are not searched.

The presence of the file is determined by whether the file can be opened for reading by the current user.

Parameters
 name Name of the input file to be searched for
Returns
The absolute path name of the first matching file is returned. If a relative path name is indicated, the relative path name is returned.

If the file is not found, a message is written to stdout and a CanteraError exception is thrown.

Definition at line 392 of file application.cpp.

References Cantera::dir_mutex, Application::inputDirs, and Cantera::npos.

Referenced by Cantera::findInputFile(), and Application::get_XML_File().

 std::string getDataDirectories ( const std::string & sep )
inline

Get the Cantera data directories.

This routine returns a string including the names of all the directories searched by Cantera for data files.

Parameters
 sep Separator to use between directories in the string
Returns
A string of directories separated by the input sep

Definition at line 280 of file application.h.

References Application::inputDirs.

## ◆ setDefaultDirectories()

 void setDefaultDirectories ( )
protected

Set the default directories for input files.

Cantera searches for input files along a path that includes platform- specific default locations, and possibly user-specified locations. This function installs the platform-specific directories on the search path. It is invoked at startup by appinit(), and never should need to be called by user programs.

The current directory (".") is always searched first. Then, on Windows platforms, if environment variable COMMONPROGRAMFILES is set (which it should be on Win XP or Win 2000), then directories under this one will be added to the search path. The Cantera Windows installer installs data files to this location.

On the Mac, directory '/Applications/Cantera/data' is added to the search path.

On any platform, if environment variable CANTERA_DATA is set to a directory name, then this directory is added to the search path.

Finally, the location where the data files were installed when Cantera was built is added to the search path.

Definition at line 310 of file application.cpp.

References Application::inputDirs, and Cantera::npos.

## ◆ ct2ctml()

 void ct2ctml ( const char * file, const int debug = 0 )

Convert a cti file into a ctml file.

Parameters
 file Pointer to the file debug Turn on debug printing

Definition at line 56 of file ct2ctml.cpp.

References Cantera::ct2ctml_string(), and Cantera::npos.

## ◆ ct2ctml_string()

 std::string ct2ctml_string ( const std::string & file )

Get a string with the ctml representation of a cti file.

Parameters
 file Path to the input file in CTI format
Returns
String containing the XML representation of the input file

Definition at line 173 of file ct2ctml.cpp.

Referenced by Cantera::ct2ctml().

## ◆ ct_string2ctml_string()

 std::string ct_string2ctml_string ( const std::string & cti )

Get a string with the ctml representation of a cti input string.

Parameters
 cti String containing the cti representation
Returns
String containing the XML representation of the input

Definition at line 178 of file ct2ctml.cpp.

Referenced by Application::get_XML_from_string().

## ◆ findInputFile() [2/2]

 std::string findInputFile ( const std::string & name )

Find an input file.

This routine will search for a file in the default locations specified for the application. See the routine setDefaultDirectories() listed above.

The default set of directories specified for the application will be searched if a '/' or an '\' is not found in the name. If either is found then a relative path name is presumed, and the default directories are not searched.

The presence of the file is determined by whether the file can be opened for reading by the current user.

Parameters
 name Name of the input file to be searched for
Returns
The absolute path name of the first matching file is returned. If a relative path name is indicated, the relative path name is returned.

If the file is not found, a message is written to stdout and a CanteraError exception is thrown.

Definition at line 130 of file global.cpp.

References Cantera::app(), and Application::findInputFile().

Referenced by Cantera::get_XML_Node().

 void addDirectory ( const std::string & dir )

Add a directory to the data file search path.

Parameters
 dir String name for the directory to be added to the search path

Definition at line 120 of file global.cpp.

 std::string getDataDirectories ( const std::string & sep )

Get the Cantera data directories.

This routine returns a string including the names of all the directories searched by Cantera for data files.

Parameters
 sep Separator to use between directories in the string
Returns
A string of directories separated by the input sep

Definition at line 125 of file global.cpp.

## ◆ canteraRoot()

 std::string canteraRoot ( )

Returns root directory where Cantera is installed.

Returns
a string containing the name of the base directory where Cantera is installed. If the environmental variable CANTERA_ROOT is defined, this function will return its value, preferentially.

Definition at line 155 of file global.cpp.

## ◆ buildSolutionFromXML()

 bool buildSolutionFromXML ( XML_Node & root, const std::string & id, const std::string & nm, ThermoPhase * th, Kinetics * kin )

Build a single-phase ThermoPhase object with associated kinetics mechanism.

In a single call, this routine initializes a ThermoPhase object and a homogeneous kinetics object for a phase. It returns the fully initialized ThermoPhase object pointer and kinetics pointer.

Parameters
 root pointer to the XML tree which will be searched to find the XML phase element. id Name of the phase to be searched for. nm Name of the XML element. Should be "phase" th Pointer to a bare ThermoPhase object, which will be initialized by this operation. kin Pointer to a bare Kinetics object, which will be initialized by this operation to a homogeneous kinetics manager
Returns
Returns true if all went well. If there are errors, it will return false.

For Example

ThermoPhase *th = new ThermoPhase();
Kinetics *kin = new Kinetics();
XML_Node *root = get_XML_File("gri30.xml");
ok = buildSolutionFromXML(root, "gri30_mix", "phase", th, kin)
importKinetics()

Definition at line 194 of file importKinetics.cpp.

## ◆ newPhase()

 ThermoPhase * newPhase ( XML_Node & phase )

Create a new ThermoPhase object and initializes it according to the XML tree.

This routine first looks up the identity of the model for the solution thermodynamics in the model attribute of the thermo child of the XML phase node. Then, it does a string lookup using Cantera's internal ThermoPhase Factory routines on the model to figure out what ThermoPhase derived class should be assigned. It creates a new instance of that class, and then calls importPhase() to populate that class with the correct parameters from the XML tree.

Parameters
 phase XML_Node reference pointing to the phase XML element.
Returns
A pointer to the completed and initialized ThermoPhase object.

Definition at line 87 of file ThermoFactory.cpp.

References XML_Node::child(), Cantera::importPhase(), and Cantera::newThermoPhase().