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globus_rsl_memory(3) Library Functions Manual globus_rsl_memory(3)

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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