parse.hpp File Reference

#include <iosfwd>
#include "moab/Interface.hpp"

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Classes
struct	TagSpec
Typedefs
typedef unsigned char	bittype
Functions
int	parse_tag_spec (char *string, TagSpec &result, moab::Interface *iface)
int	parse_tag_create (char *string, TagSpec &result, moab::Interface *iface)
void	tag_syntax (std::ostream &stream)

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Typedef Documentation

typedef unsigned char bittype

Definition at line 27 of file parse.hpp.

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Function Documentation

int parse_tag_create	(	char *	string,
		TagSpec &	result,
		moab::Interface *	iface
	)

Definition at line 275 of file parse.cpp.

References ErrorCode, TagSpec::handle, MB_ENTITY_NOT_FOUND, MB_SUCCESS, MB_TAG_ANY, MB_TAG_CREAT, MB_TAG_SPARSE, MB_TYPE_BIT, MB_TYPE_DOUBLE, MB_TYPE_HANDLE, MB_TYPE_INTEGER, MB_TYPE_OPAQUE, parse_values(), moab::Interface::tag_get_data_type(), moab::Interface::tag_get_default_value(), moab::Interface::tag_get_handle(), moab::Interface::tag_get_length(), and TagSpec::value.

Referenced by main().

{
    // split at '=' signs

    char* eq1 = strrchr( name, '=' );
    if( !eq1 )
    {
        std::cerr << "Invalid tag specification: " << name << std::endl;
        return 1;
    }
    *eq1 = '\0';
    ++eq1;
    char *type_str = eq1, *val = 0;

    char* eq2 = strrchr( name, '=' );
    if( eq2 )
    {
        *eq2 = '\0';
        ++eq2;
        val      = ( '\0' == eq1[0] ) ? 0 : eq1;
        type_str = eq2;
    }

    // parse type data
    char* size_str = strchr( type_str, ':' );
    if( !size_str )
    {
        std::cerr << "Invalid tag type specification: " << type_str << std::endl;
        return 1;
    }
    *size_str = '\0';
    ++size_str;
    DataType type;
    if( !strcmp( type_str, "int" ) )
    {
        type = MB_TYPE_INTEGER;
    }
    else if( !strcmp( type_str, "double" ) )
    {
        type = MB_TYPE_DOUBLE;
    }
    else if( !strcmp( type_str, "bit" ) )
    {
        type = MB_TYPE_BIT;
    }
    else if( !strcmp( type_str, "handle" ) )
    {
        type = MB_TYPE_HANDLE;
    }
    else if( !strcmp( type_str, "opaque" ) )
    {
        type = MB_TYPE_OPAQUE;
    }
    else
    {
        std::cerr << "Invalid tag type specification: " << type_str << std::endl;
        return 1;
    }
    char* end_ptr;
    int count = (int)strtol( size_str, &end_ptr, 0 );
    if( !*size_str || *end_ptr || count < 1 )
    {
        std::cerr << "Invalid tag size specification: " << size_str << std::endl;
        return 1;
    }

    // parse default value
    result.value = 0;
    if( val )
    {
        result.value = parse_values( val, type, count );
        if( !result.value ) return 1;
    }

    // check if tag exists
    if( MB_SUCCESS == iface->tag_get_handle( name, 0, MB_TYPE_OPAQUE, result.handle, MB_TAG_ANY ) )
    {
        // make sure it matches
        DataType etype;
        int esize;
        if( MB_SUCCESS != iface->tag_get_data_type( result.handle, etype ) ||
            MB_SUCCESS != iface->tag_get_length( result.handle, esize ) )
        {
            std::cerr << "Error accessing properties of tag: " << name << std::endl;
            return 3;
        }

        if( etype != type || esize != count )
        {
            std::cerr << "Tag already exists with different type: " << name << std::endl;
            return 1;
        }

        std::vector< unsigned char > value( esize );
        if( result.value )
        {
            ErrorCode rval = iface->tag_get_default_value( result.handle, &value[0] );
            if( rval != MB_ENTITY_NOT_FOUND && rval != MB_SUCCESS )
            {
                std::cerr << "Error checking default value of tag: " << name << std::endl;
                return 3;
            }
            else if( rval == MB_ENTITY_NOT_FOUND || memcmp( &value[0], result.value, esize ) )
            {
                std::cerr << "Tag already exists and default value doesn't match: " << name << std::endl;
                return 1;
            }
        }
    }
    else
    {
        ErrorCode rval =
            iface->tag_get_handle( name, count, type, result.handle, MB_TAG_SPARSE | MB_TAG_CREAT, result.value );
        if( MB_SUCCESS != rval )
        {
            std::cerr << "Failed to create tag: " << name << std::endl;
            return 3;
        }
    }

    return 0;
}

int parse_tag_spec	(	char *	string,
		TagSpec &	result,
		moab::Interface *	iface
	)

Definition at line 218 of file parse.cpp.

References ErrorCode, TagSpec::handle, MB_SUCCESS, MB_TAG_ANY, MB_TAG_NOT_FOUND, MB_TYPE_OPAQUE, parse_values(), size, moab::Interface::tag_get_data_type(), moab::Interface::tag_get_handle(), moab::Interface::tag_get_length(), and TagSpec::value.

Referenced by main().

{
    //  Separate optional tag value from tag name
    char* val = strrchr( name, '=' );
    if( val )
    {
        // zero-length tag name>
        if( val == name )
        {
            std::cerr << "Cannot create tag w/out name: " << name << std::endl;
            return 1;
        }
        *val = '\0';
        if( !*++val )  // if name ends with an '=', set val to NULL.
            val = 0;
    }

    // Get tag
    ErrorCode rval = iface->tag_get_handle( name, 0, MB_TYPE_OPAQUE, result.handle, MB_TAG_ANY );
    if( MB_TAG_NOT_FOUND == rval )
    {
        std::cerr << "Tag not found: " << name << std::endl;
        return 2;
    }
    else if( MB_SUCCESS != rval )
    {
        std::cerr << "Error retrieving tag handle: " << name << std::endl;
        return 3;
    }

    // Parse tag value
    result.value = 0;
    if( val )
    {
        DataType type;
        rval = iface->tag_get_data_type( result.handle, type );
        if( MB_SUCCESS != rval )
        {
            std::cerr << "Error retrieving type for tag: " << name << std::endl;
            return 3;
        }

        int size;
        rval = iface->tag_get_length( result.handle, size );
        if( MB_SUCCESS != rval )
        {
            std::cerr << "Error retrieving size for tag: " << name << std::endl;
            return 3;
        }

        result.value = parse_values( val, type, size );
        if( !result.value ) return 1;
    }

    return 0;
}

void tag_syntax

(

std::ostream &

stream

)

Definition at line 10 of file parse.cpp.

Referenced by usage().

{
    s << "Tags are specified as =[value], where the tag value " << std::endl
      << "is optional." << std::endl
      << std::endl
      << "Values of integral types (INTEGER, BIT, and HANDLE) are " << std::endl
      << "specified using standard C integer notation (a 0x prefix " << std::endl
      << "for hexidecimal, 0 prefix for octal, and no prefix for " << std::endl
      << "decimal.)  The value of an opaque tag is interpreted as " << std::endl
      << "either a integral value or a character string. If the tag " << std::endl
      << "value begins with the prefix 0x it will be interpreted as a " << std::endl
      << "hexidecimal (base-16) number.  If the value does not begin " << std::endl
      << "with the 0x prefix, it is interpreted as a character string." << std::endl
      << "Characater strings will be padded with null characters as" << std::endl
      << "necessary to fill the tag." << std::endl
      << "Floating-point (real) values must be specified in base-10." << std::endl
      << "C exponential notation (e.g. 1e-10) is accepted." << std::endl
      << std::endl
      << "If the tag is an array of integral or floating-point values " << std::endl
      << "then the tag value must be specified as a comma-separated " << std::endl
      << "list, with NO spaces." << std::endl
      << std::endl
      << "Tags are created with the syntax name=type:size[=default_value]." << std::endl
      << "where type is one of {int,double,opaque,handle,bit} and size is " << std::endl
      << "the number of values of the specified type, or the number of " << std::endl
      << "bytes if the type is 'opaque',  A default value for the tag may " << std::endl
      << "be specified." << std::endl;
}