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NAME

Tcl_GetKeyedListKeys,
Tcl_GetKeyedListField, Tcl_SetKeyedListField, Tcl_DeleteKeyedListField - Keyed list management routines.

SYNOPSIS

#include <tclExtend.h>

int
Tcl_GetKeyedListKeys (Tcl_Interp *interp, const char *subFieldName, const char *keyedList,

int
*keyesArgcPtr,
char
***keyesArgvPtr);

int
Tcl_GetKeyedListField (Tcl_Interp *interp, const char *fieldName, const char *keyedList,
char
**fieldValuePtr);

char *
Tcl_SetKeyedListField (Tcl_Interp *interp, const char *fieldName, const char *fieldvalue, const char *keyedList);

char *
Tcl_DeleteKeyedListField (Tcl_Interp *interp, const char *fieldName, const char *keyedList);

DESCRIPTION

These routines perform operations on keyed lists. See the Extended Tcl man page for a description of keyed lists.

Tcl_GetKeyedListKeys
Retrieve a list of keyes from a keyed list. The list is walked rather than converted to a argv for increased performance.

Parameters:
o interp - Error message will be return in result if there is an error.
o subFieldName - If "" or NULL, then the keys are retreved for the top level of the list. If specified, it is name of the field who's subfield keys are to be retrieve.
o keyedList - The list to search for the field. o keyesArgcPtr - The number of keys in the keyed list is returned here.
o keyesArgvPtr - An argv containing the key names. It is dynamically allocated, containing both the array and the strings. A single call to ckfree will release it.

Returns:
TCL_OK if a list of keys is returned, TCL_BREAK if the field was not found, or TCL_ERROR if an error occured.

Tcl_GetKeyedListField
Retrieve a field value from a keyed list. The list is walked rather than converted to a argv for increased performance. This if the name contains sub-fields, this function recursive.

Parameters:
o interp - Error message will be return in result if there is an error.
o fieldName - The name of the field to extract. Will recusively process sub-field names seperated by `.'. o keyedList - The list to search for the field. o fieldValuePtr - If the field is found, a pointer to a dynamicly allocated string containing the value is returned here. If NULL is specified, then only the presence of the field is validated, the value is not returned.

Returns:
TCL_OK if the field was found, TCL_BREAK if the field was not found or TCL_ERROR if an error occured.

Tcl_SetKeyedListField
Set a field value in keyed list.

Parameters:
o interp - Error message will be return in result if there is an error.
o fieldName - The name of the field to extract. Will recusively process sub-field names seperated by `.'. o fieldValue - The value to set for the field. o keyedList - The keyed list to set a field value in, may be an NULL or an empty list to create a new keyed list.

Returns:
A pointer to a dynamically allocated string, or NULL if an error occured.

Tcl_DeleteKeyedListField
Delete a field value in keyed list.

Parameters:
o interp - Error message will be return in result if there is an error.
o fieldName - The name of the field to extract. Will recusively process sub-field names seperated by `.'. o fieldValue - The value to set for the field. o keyedList - The keyed list to delete the field from.

Returns:
A pointer to a dynamically allocated string containing the new list, or NULL if an error occured.


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