NAME

       globus_rsl_memory - RSL Memory Management

        - RSL Memory Management.

SYNOPSIS

   Functions
       globus_rsl_t * globus_rsl_copy_recursive (globus_rsl_t *ast_node)
           Create a deep copy of an RSL syntax tree.
       globus_rsl_value_t * globus_rsl_value_copy_recursive (globus_rsl_value_t
           *globus_rsl_value_ptr)
           Create a deep copy of an RSL value.
       int globus_rsl_value_free (globus_rsl_value_t *val)
           Free an RSL value node.
       int globus_rsl_free (globus_rsl_t *ast_node)
           Free an RSL syntax tree node.
       int globus_rsl_value_free_recursive (globus_rsl_value_t *globus_rsl_value_ptr)
           Free an RSL value and all its child nodes.
       int globus_rsl_free_recursive (globus_rsl_t *ast_node)
           Free an RSL syntax tree and all its child nodes.
       int globus_rsl_value_list_literal_replace (globus_list_t *value_list, char *string_value)
           Replace the first value in a value list with a literal.
       int globus_rsl_value_eval (globus_rsl_value_t *ast_node, globus_symboltable_t
           *symbol_table, char **string_value, int rsl_substitution_flag)
           Evaluate RSL substitions in an RSL value node.
       int globus_rsl_eval (globus_rsl_t *ast_node, globus_symboltable_t *symbol_table)
           Evaluate an RSL syntax tree.

Detailed Description

       RSL Memory Management.

Function Documentation

   globus_rsl_t * globus_rsl_copy_recursive (globus_rsl_t * ast_node)
       Create a deep copy of an RSL syntax tree. The globus_rsl_copy_recursive() function
       performs a deep copy of the RSL syntax tree pointed to by the ast_node parameter. All RSL
       nodes, value nodes, variable names, attributes, and literals will be copied to the return
       value.

       Parameters
           ast_node An RSL syntax tree to copy.

       Returns
           The globus_rsl_copy_recursive() function returns a copy of its input parameter that
           that can be used after the ast_node and its values have been freed. If an error
           occurs, globus_rsl_copy_recursive() returns NULL.

   int globus_rsl_eval (globus_rsl_t * ast_node, globus_symboltable_t * symbol_table)
       Evaluate an RSL syntax tree. The globus_rsl_eval() function modifies the RSL parse tree
       pointed to by its ast_node parameter by replacing all RSL substitution variable reference
       nodes with the literal values those variables evaluate to based on the current scope of
       the symbol table pointed to by the symbol_table parameter. It also combines string
       concatenations into literal string values. Any nodes which are replaced by this function
       are freed using globus_rsl_value_free_recursive().

       Parameters
           ast_node A pointer to the RSL syntax tree to evaluate.
           symbol_table A symbol table containing current definitions of the RSL substitutions
           which can occur in this evaluation scope.

       Returns
           Upon success, globus_rsl_eval() returns GLOBUS_SUCCESS, and replaces all RSL
           substitution values and concatenations in ast_node or its child nodes with the
           evaluated forms described above. If an error occurs, globus_rsl_eval() returns a non-
           zero value.

   int globus_rsl_free (globus_rsl_t * ast_node)
       Free an RSL syntax tree node. The globus_rsl_free() function frees the RSL syntax tree
       node pointed to by the ast_node parameter. This only frees the RSL syntax tree node
       itself, and not any boolean operands, relation names, or values associated with the node.

       Parameters
           ast_node The RSL syntax tree node to free.

       Returns
           The globus_rsl_value_free() function always returns GLOBUS_SUCCESS.

   int globus_rsl_free_recursive (globus_rsl_t * ast_node)
       Free an RSL syntax tree and all its child nodes. The globus_rsl_free_recursive() function
       frees the RSL syntax tree pointed to by the ast_node parameter, including all boolean
       operands, attribute names, and values. Any pointers to these are no longer valid after
       globus_rsl_free_recursive() returns.

       Parameters
           ast_node An RSL parse tree to free.

       Returns
           The globus_rsl_value_free_recursive() function always returns GLOBUS_SUCCESS.

   globus_rsl_value_t * globus_rsl_value_copy_recursive (globus_rsl_value_t *
       globus_rsl_value_ptr)
       Create a deep copy of an RSL value. The globus_rsl_value_copy_recursive() function
       performs a deep copy of the RSL value pointed to by the globus_rsl_value_ptr parameter.
       All variable names, attributes, literals, and value lists will be copied to the return
       value.

       Parameters
           globus_rsl_value_ptr A pointer to an RSL value to copy.

       Returns
           The globus_rsl_value_copy_recursive() function returns a copy of its input parameter
           that that can be used after the globus_rsl_value_ptr and its values have been freed.
           If an error occurs, globus_rsl_value_copy_recursive() returns NULL.

   int globus_rsl_value_eval (globus_rsl_value_t * ast_node, globus_symboltable_t * symbol_table,
       char ** string_value, int rsl_substitution_flag)
       Evaluate RSL substitions in an RSL value node. The globus_rsl_value_eval() function
       modifies the value pointed to by its ast_node parameter by replacing all RSL substitution
       variable reference nodes with the literal values those variables evaluate to based on the
       current scope of the symbol table pointed to by the symbol_table parameter. It also
       combines string concatenations into literal string values. Any nodes which are replaced by
       this function are freed using globus_rsl_value_free_recursive().

       Parameters
           ast_node A pointer to the RSL value node to evaluate.
           symbol_table A symbol table containing current definitions of the RSL substitutions
           which can occur in this evaluation scope.
           string_value An output parameter which is set to point to the value of the string
           returned by evaluating the value node pointed to by ast_node if it evaluates to a
           literal value. list pointed to by the value_list parameter.
           rsl_substitution_flag A flag indicating whether the node pointed to by the ast_node
           parameter defines RSL substition variables.

       Returns
           Upon success, globus_rsl_value_eval() returns GLOBUS_SUCCESS, and replaces any RSL
           substitution values in the node pointed to by the ast_node parameter. If the node
           evaluates to a single literal, the string_value parameter is modified to point to the
           value of that literal. If an error occurs, globus_rsl_value_eval() returns a non-zero
           value.

   int globus_rsl_value_free (globus_rsl_value_t * val)
       Free an RSL value node. The globus_rsl_value_free() function frees the RSL value pointed
       to by the val parameter. This only frees the RSL value node itself, and not any sequence
       or string values associated with that node.

       Parameters
           val The RSL value node to free.

       Returns
           The globus_rsl_value_free() function always returns GLOBUS_SUCCESS.

   int globus_rsl_value_free_recursive (globus_rsl_value_t * globus_rsl_value_ptr)
       Free an RSL value and all its child nodes. The globus_rsl_free_recursive() function frees
       the RSL value node pointed to by the globus_rsl_value_ptr, including all literal strings,
       variable names, and value sequences. Any pointers to these are no longer valid after
       globus_rsl_value_free_recursive() returns.

       Parameters
           globus_rsl_value_ptr An RSL value node to free.

       Returns
           The globus_rsl_value_free_recursive() function always returns GLOBUS_SUCCESS.

   int globus_rsl_value_list_literal_replace (globus_list_t * value_list, char * string_value)
       Replace the first value in a value list with a literal. The
       globus_rsl_value_list_literal_replace() function replaces the first value in the list
       pointed to by the value_list parameter with a new value node that is a literal string node
       pointing to the value of the string_value parameter, freeing the old value.

       Parameters
           value_list The RSL value list to modify by replacing its first element.
           string_value The new string value to use as a literal first element of the list
           pointed to by the value_list parameter.

       Returns
           Upon success, globus_rsl_value_list_literal_replace() returns GLOBUS_SUCCESS, frees
           the current first value of value_list and replaces it with a new literal string node
           pointing to the value of the string_value parameter. If an error occurs,
           globus_rsl_value_list_literal_replace() returns 1.

Author

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