CppCommandLine Struct Reference

Helper structure to construct C++ command line argc and argv variables from a Python list. More...

#include <NekPyConfig.hpp>

Public Member Functions
	CppCommandLine (py::list &py_argv)
	Constructor. More...
	~CppCommandLine ()
	Destructor. More...
char **	GetArgv ()
	Returns the constructed argv. More...
int	GetArgc ()
	Returns the constructed argc. More...

Private Attributes
char **	m_argv = nullptr
	Pointers for strings argv. More...
int	m_argc = 0
	Number of arguments argc. More...
std::vector< char >	m_buf
	Buffer for storage of the argument strings. More...

Detailed Description

Helper structure to construct C++ command line argc and argv variables from a Python list.

Definition at line 88 of file NekPyConfig.hpp.

Constructor & Destructor Documentation

CppCommandLine()

CppCommandLine::CppCommandLine ( py::list &  py_argv )

inline

Constructor.

Parameters

py_argv

List of command line arguments from Python.

Definition at line 95 of file NekPyConfig.hpp.

                                    : m_argc(py::len(py_argv))
    {
        int i          = 0;
        size_t bufSize = 0;
        char *p;
 
        m_argv = new char *[m_argc + 1];
 
        // Create argc, argv to give to the session reader. Note that this needs
        // to be a contiguous block in memory, otherwise MPI (specifically
        // OpenMPI) will likely segfault.
        for (i = 0; i < m_argc; ++i)
        {
            std::string tmp = py::cast<std::string>(py_argv[i]);
            bufSize += tmp.size() + 1;
        }
 
        m_buf.resize(bufSize);
        for (i = 0, p = &m_buf[0]; i < m_argc; ++i)
        {
            std::string tmp = py::cast<std::string>(py_argv[i]);
            std::copy(tmp.begin(), tmp.end(), p);
            p[tmp.size()] = '\0';
            m_argv[i]     = p;
            p += tmp.size() + 1;
        }
 
        m_argv[m_argc] = nullptr;
    }

References CellMLToNektar.pycml::copy(), m_argc, m_argv, m_buf, and CellMLToNektar.cellml_metadata::p.

~CppCommandLine()

CppCommandLine::~CppCommandLine ( )

inline

Destructor.

Definition at line 128 of file NekPyConfig.hpp.

    {
        if (m_argv == nullptr)
        {
            return;
        }
 
        delete m_argv;
    }

References m_argv.

Member Function Documentation

GetArgc()

int CppCommandLine::GetArgc ( )

inline

Returns the constructed argc.

Definition at line 149 of file NekPyConfig.hpp.

    {
        return m_argc;
    }

References m_argc.

Referenced by Field_Init(), NewPartition(), and SessionReader_CreateInstance().

GetArgv()

char ** CppCommandLine::GetArgv ( )

inline

Returns the constructed argv.

Definition at line 141 of file NekPyConfig.hpp.

    {
        return m_argv;
    }

References m_argv.

Referenced by Field_Init(), NewPartition(), and SessionReader_CreateInstance().

Member Data Documentation

m_argc

int CppCommandLine::m_argc = 0

private

Number of arguments argc.

Definition at line 158 of file NekPyConfig.hpp.

Referenced by CppCommandLine(), and GetArgc().

m_argv

char** CppCommandLine::m_argv = nullptr

private

Pointers for strings argv.

Definition at line 156 of file NekPyConfig.hpp.

Referenced by CppCommandLine(), GetArgv(), and ~CppCommandLine().

m_buf

std::vector<char> CppCommandLine::m_buf

private

Buffer for storage of the argument strings.

Definition at line 160 of file NekPyConfig.hpp.

Referenced by CppCommandLine().