Schema and data model Xpath search support. More...

#include <xmlstring.h>
#include <xmlreader.h>
#include <xmlregexp.h>
#include "dlq.h"
#include "ncxtypes.h"
#include "status.h"
#include "obj.h"
#include "tk.h"
#include "val.h"
#include "var.h"
#include "yang.h"

Include dependency graph for xpath.h:

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Data Structures
struct	xpath_get2_cb_t
	Special XPath GET2 state record to be used instead of val_value_t or val_child_hdr_t pointers. More...

struct	xpath_get2_node_t
	Special XPath GET2 resnode. More...

struct	xpath_resnode_t
	XPath result node struct. More...

union	xpath_resnode_t::node_
	if the result->isval flag is false then the objptr is used in all resnodes in that result More...

struct	xpath_result_t
	XPath expression result. More...

union	xpath_result_t::r_
	result r contains the appropiate data depending on restype More...

struct	xpath_pred_ent_t
	quick processing of NACM data rule predicates. More...

struct	xpath_pcb_t
	XPath parser control block. More...

struct	xpath_fncb_t
	XPath function control block. More...

struct	xpath_walkerparms_t
	Value or object node walker fn callback parameters. More...

struct	xpath_compwalkerparms_t
	Value node compare walker fn callback parameters. More...

struct	xpath_stringwalkerparms_t
	Value node stringify walker fn callback parameters. More...

struct	xpath_aio_cb_t
	AIO Subtree respresentation. More...

Macros
#define	XP_URL_ESC_WILDCARD '-'
	Special URL to XPath translation.

#define	XP_FL_DYNNODE bit0
	Begin XPath control block flag definitions (uint32). More...

#define	XP_FL_SKIP_MODE bit1
	during XPath evaluation, skipping the rest of a FALSE AND or TRUE OR expression

#define	XP_FL_LOAD_IMPORT bit2
	OLD: bit 2 not used. More...

#define	XP_FL_ABSPATH bit3
	used by xpath_leafref.c to keep track of path type

#define	XP_FL_CONFIGONLY bit4
	used for YANG/NETCONF to auto-filter any non-config nodes that are matched by an XPath wildcard mechanism

#define	XP_FL_USEROOT bit5
	used to indicate the top object node is set FALSE to indicate that all the ncx_module_t datadefQs need to be searched instead

#define	XP_FL_INSTANCEID bit6
	used to restrict the XPath expression to the YANG instance-identifier syntax

#define	XP_FL_SCHEMA_INSTANCEID bit7
	used to restrict the XPath expression to an ncx:schema-instance string syntax

#define	XP_FL_TOP_RPC_INPUT bit8
	set if starting context node is RPC input which is allowed in YANG 1.1 More...

#define	XP_FL_ACTION_INPUT bit9
	set if starting context node is within action input which is allowed in YANG 1.1 More...

#define	XP_FL_NACM_GET2 bit10
	set if the XPath parser is being called to cache a data rule but found a GET2 node, forcing this rule to be checked during GET2 traversal

#define	XP_FL_KEEP_RESULT bit11
	set if the caller wants the test result to be kept will free pcb->result if already set when trying to save eval result

#define	XP_FL_FOUND_PRED bit12
	set if the parser found any predicates in the XPath expression

#define	XP_FL_GET_WHEN bit13
	the parser is processing a when-stmt for a GET node so retrieve the value now instead of leaving the state to XP_RSP_GET2_PENDING

#define	XP_FL_FROM_DBLSLASH bit14
	if the PCB is created from a converted dblslash expression then the scb->reader cannot be used so flag it as a converted filter

#define	XP_FL_EMPTY_GET bit15
	flag to indicate that the get operation has an empty return set for the filter evaluation and the final output needs to skip the XPath evaluation

#define	XP_FL_BACKPTR_CDIRTY bit0
	static config dirty for <candidate>

#define	XP_FL_BACKPTR_RDIRTY bit1
	static config dirty for <running>

#define	XP_FL_BACKPTR_SDIRTY bit2
	static config dirty for <startup>

#define	XPATH_GET_TYPE(P) (P)->xpath_type
	get the XPath type from xpath_pcb_t * (P)

#define	XPATH_GET_RESTYPE(R) (R)->restype
	get the result type from xpath_result_t * (R)

#define	XPATH_NACM_GET2(P) ((P)->flags & XP_FL_NACM_GET2)
	test if the NACM GET2 mode is active in xpath_pcb_t (P)

#define	XPATH_NONCONFIG_WARN(P) (P)->nonconfig_warn_obj
	YPW-1363: check nonconfig warning.

#define	XPATH_VAL_CXT(P) ((P)->val \|\| (P)->val_get2)
	test if context node is a value or get2 in xpath_pcb_t * (P)

#define	XPATH_ANY_CXT(P) ((P)->val \|\| (P)->val_get2 \|\| (P)->obj)
	test if context node is a value or get2 in xpath_pcb_t * (P)

#define	XPATH_SCB(P) (P)->scb
	access the XPath scb backptr in xpath_pcb_t * (P)

#define	XPATH_GET2CB_OBJ(N) (N)->cb->obj
	access the GET2 control block object in xpath_get2_node_t (N)

#define	XPATH_MHDR(P) (P)->mhdr
	access the message header back pointer

#define	XPATH_EXPRSTR(P) (P)->exprstr
	access the XPath extression string

#define	XPATH_SET_DISABLED_OBJ_OK(P) (P)->disabled_obj_ok = TRUE
	set the disabled_obj_ok flag

#define	XPATH_CLR_DISABLED_OBJ_OK(P) (P)->disabled_obj_ok = FALSE
	clear the disabled_obj_ok flag

#define	XPATH_DISABLED_OBJ_OK(P) (P)->disabled_obj_ok
	check the disabled_obj_ok flag

#define	XPATH_ROOTCB(P) (P)->rootcb
	access the rootcb back pointer

#define	XPATH_SET_FROM_DBLSLASH(P) (P)->flags \|= XP_FL_FROM_DBLSLASH
	SET if the PCB is from a converted dblslash expression.

#define	XPATH_IS_FROM_DBLSLASH(P) ((P)->flags & XP_FL_FROM_DBLSLASH)
	TEST if the PCB is from a converted dblslash expression.

#define	XPATH_SET_EMPTY_GET(P) (P)->flags \|= XP_FL_EMPTY_GET
	SET if the PCB is a forced empty return.

#define	XPATH_IS_EMPTY_GET(P) ((P)->flags & XP_FL_EMPTY_GET)
	TEST if the PCB is a forced empty return.

#define	XPATH_WHEN_OBJ(P) (P)->when_obj
	access the when_obj backptr in xpath_pcb_t * (P)

Typedefs
typedef ncx_var_t (	xpath_getvar_fn_t) (struct xpath_pcb_t_ pcb, const xmlChar varname, status_t *res)
	XPath GET variable callback function. More...

typedef status_t(*	xpath_bool_eval_fn_t) (struct xpath_pcb_t_ pcb, val_value_t context, val_value_t docroot, boolean result)
	XPath Boolean EVAL Replacement Callback. More...

typedef xpath_result_t (	xpath_fn_t) (xpath_pcb_t pcb, dlq_hdr_t parmQ, status_t *res)
	XPath function prototype. More...

Enumerations
enum	xpath_restype_t { XP_RT_NONE , XP_RT_NODESET , XP_RT_NUMBER , XP_RT_STRING , XP_RT_BOOLEAN }
	XPath expression result type. More...

enum	xpath_curmode_t { XP_CM_NONE , XP_CM_TARGET , XP_CM_ALT , XP_CM_KEYVAR }
	XPath dynamic parsing mode for leafref. More...

enum	xpath_document_t { XP_DOC_NONE , XP_DOC_DATABASE , XP_DOC_RPC , XP_DOC_RPC_REPLY , XP_DOC_NOTIFICATION }
	document root type. More...

enum	xpath_source_t { XP_SRC_NONE , XP_SRC_LEAFREF , XP_SRC_YANG , XP_SRC_INSTANCEID , XP_SRC_SCHEMA_INSTANCEID , XP_SRC_XML }
	XPath expression source type. More...

enum	xpath_exop_t { XP_EXOP_NONE , XP_EXOP_AND , XP_EXOP_OR , XP_EXOP_EQUAL , XP_EXOP_NOTEQUAL , XP_EXOP_LT , XP_EXOP_GT , XP_EXOP_LEQUAL , XP_EXOP_GEQUAL , XP_EXOP_ADD , XP_EXOP_SUBTRACT , XP_EXOP_MULTIPLY , XP_EXOP_DIV , XP_EXOP_MOD , XP_EXOP_NEGATE , XP_EXOP_UNION , XP_EXOP_FILTER1 , XP_EXOP_FILTER2 }
	XPath expression operation type. More...

enum	xpath_nodetype_t { XP_EXNT_NONE , XP_EXNT_COMMENT , XP_EXNT_TEXT , XP_EXNT_PROC_INST , XP_EXNT_NODE }
	XPath expression node types. More...

enum	xpath_rntype_t { XP_RNT_NONE , XP_RNT_OBJ , XP_RNT_VAL , XP_RNT_VALHDR , XP_RNT_GET2 }
	XPath resnode union types. More...

enum	xpath_get2_state_t { XP_RST_NONE , XP_RST_GET2_PENDING , XP_RST_GET2_SKIPPED , XP_RST_GET2_START , XP_RST_GET2_DONE , XP_RST_GET2_ERROR }
	GET2 retrieval states. More...

enum	xpath_get2_form_t { XP_FORM_NONE , XP_FORM_GETCB , XP_FORM_GETCB_TERM , XP_FORM_GETCB_CHILD }
	GET2 control block forms. More...

Functions
status_t	xpath_find_schema_target (yang_pcb_t pcb, tk_chain_t tkc, ncx_module_t mod, obj_template_t obj, dlq_hdr_t datadefQ, const xmlChar target, obj_template_t targobj, dlq_hdr_t targQ)
	Find the schema target, save in *targobj. More...

status_t	xpath_find_schema_target_force_mod (yang_pcb_t pcb, tk_chain_t tkc, ncx_module_t mod, ncx_module_t force_mod, obj_template_t obj, dlq_hdr_t datadefQ, const xmlChar target, obj_template_t targobj, dlq_hdr_t *targQ)
	find target, save in *targobj, force the module More...

status_t	xpath_find_schema_target_err (yang_pcb_t pcb, tk_chain_t tkc, ncx_module_t mod, obj_template_t obj, dlq_hdr_t datadefQ, const xmlChar target, obj_template_t targobj, dlq_hdr_t targQ, ncx_error_t *tkerr)
	find target, save in *targobj, use the errtk if error More...

status_t	xpath_find_val_target (val_value_t startval, ncx_module_t mod, const xmlChar target, val_value_t *targval)
	Find the XPath value node target. More...

status_t	xpath_find_schema_target_load (const xmlChar target, boolean for_mp, obj_template_t *targobj)
	internal find target, without any error reporting. More...

status_t	xpath_find_data_target_pcb (xpath_pcb_t pcb, obj_template_t *targobj)
	Find schema target for a datastore node. More...

status_t	xpath_find_val_unique (val_value_t startval, ncx_module_t mod, const xmlChar target, val_value_t root, boolean logerrors, boolean configonly, xpath_pcb_t **retpcb)
	Find the data node for a unique-stmt target. More...

xpath_pcb_t *	xpath_new_pcb (const xmlChar *xpathstr, xpath_getvar_fn_t getvar_fn)
	malloc a new XPath parser control block More...

xpath_pcb_t *	xpath_new_pcb_ex (const xmlChar xpathstr, xpath_getvar_fn_t getvar_fn, void cookie)
	malloc a new XPath parser control block Extended More...

xpath_pcb_t *	xpath_clone_pcb (const xpath_pcb_t *srcpcb)
	Clone an XPath PCB. More...

xpath_pcb_t *	xpath_find_pcb (dlq_hdr_t pcbQ, const xmlChar exprstr)
	Find an XPath PCB. More...

void	xpath_free_pcb (xpath_pcb_t *pcb)
	Free a malloced XPath parser control block. More...

xpath_result_t *	xpath_new_result (xpath_restype_t restype)
	malloc an XPath result More...

void	xpath_init_result (xpath_result_t *result, xpath_restype_t restype)
	Initialize an XPath result struct. More...

void	xpath_free_result (xpath_result_t *result)
	Free a malloced XPath result struct. More...

void	xpath_clean_result (xpath_result_t *result)
	Clean an XPath result struct. More...

xpath_resnode_t *	xpath_new_resnode (void)
	Create and initialize an XPath result node struct. More...

void	xpath_init_resnode (xpath_resnode_t *resnode)
	Initialize an XPath result node struct. More...

void	xpath_free_resnode (xpath_resnode_t *resnode)
	Free a malloced XPath result node struct. More...

void	xpath_delete_resnode (xpath_resnode_t *resnode)
	Delete and free a malloced XPath result node struct. More...

void	xpath_clean_resnode (xpath_resnode_t *resnode)
	Clean an XPath result node struct. More...

status_t	xpath_get_curmod_from_prefix (xpath_pcb_t pcb, const xmlChar prefix, ncx_module_t mod, ncx_module_t *targmod)
	Get the correct module to use for a given prefix. More...

status_t	xpath_get_curmod_from_prefix2 (xpath_pcb_t pcb, const xmlChar prefix, ncx_module_t mod, ncx_module_t targmod, const xmlChar *modname)
	Get the correct module to use for a given prefix Return found module name if returning not-found error. More...

status_t	xpath_get_modinfo_from_prefix (const xmlChar prefix, ncx_module_t mod, const xmlChar modname, const xmlChar modrev)
	Get the correct module name/revision to use for a given prefix. More...

status_t	xpath_get_curmod_from_prefix_str (xpath_pcb_t pcb, const xmlChar prefix, uint32 prefixlen, ncx_module_t mod, ncx_module_t *targmod)
	Get the correct module to use for a given prefix Unended string version. More...

status_t	xpath_parse_token (xpath_pcb_t *pcb, tk_type_t tktype)
	Parse the XPath token sequence for a specific token type. More...

boolean	xpath_cvt_boolean (const xpath_result_t *result)
	Convert an XPath result to a boolean answer. More...

void	xpath_cvt_number (const xpath_result_t result, ncx_num_t num)
	Convert an XPath result to a number answer. More...

status_t	xpath_cvt_string (xpath_pcb_t pcb, const xpath_result_t result, xmlChar **str)
	Convert an XPath result to a string answer. More...

dlq_hdr_t *	xpath_get_resnodeQ (xpath_result_t *result)
	Get the renodeQ from a result struct. More...

val_value_t *	xpath_next_resnode_valptr (xpath_resnode_t resnode, val_value_t valptr)
	Get the next node val pointer from a result node struct. More...

obj_template_t *	xpath_get_resnode_obj (xpath_resnode_t *resnode)
	Get the resnode object pointer from a value resnode. More...

obj_template_t *	xpath_get_cxt_obj (xpath_pcb_t *pcb)
	Get the object pointer for the context node. More...

val_value_t *	xpath_get_resnode_val (xpath_resnode_t *resnode)
	Get the resnode value pointer from a resnode, if any. More...

obj_template_t *	xpath_get_resnode_objptr (xpath_resnode_t *resnode)
	Get the result node object pointer (obsolete) More...

dlq_hdr_t *	xpath_get_varbindQ (xpath_pcb_t *pcb)
	Get the varbindQ from a parser control block struct. More...

void	xpath_move_nodeset (xpath_result_t srcresult, xpath_result_t destresult)
	Move the nodes from a nodeset reult into the target nodeset result. More...

boolean	xpath_nodeset_empty (const xpath_result_t *result)
	Check if the result is an empty nodeset. More...

void	xpath_nodeset_swap_valptr (xpath_result_t result, val_value_t oldval, val_value_t *newval)
	Check if the result has the oldval ptr and if so, replace it with the newval ptr. More...

void	xpath_nodeset_delete_valptr (xpath_result_t result, val_value_t oldval)
	Check if the result has the oldval ptr and if so, delete it. More...

xmlChar *	xpath_convert_url_to_path (const xmlChar urlpath, ncx_name_match_t match_names, boolean alt_naming, boolean wildcards, boolean withkeys, boolean fullkeys, boolean withmod, ncx_protocol_t proto, status_t res)
	Convert a URL format path to XPath format path. More...

void	xpath_set_backptrs_dirty (xpath_pcb_t *pcb, ncx_cfg_t cfg_id, boolean dirty)
	Set the backptrs_dirty flag in the PCB. More...

boolean	xpath_check_backptrs_dirty (xpath_pcb_t *pcb, ncx_cfg_t cfg_id)
	Check the backptrs_dirty flag in the PCB. More...

boolean	xpath_check_manual_clear (xpath_pcb_t *pcb)
	Check the backptrs_dirty flag in the PCB is clearly manually only. More...

void	xpath_set_manual_clear (xpath_pcb_t *pcb)
	Set the manual clear mode flag in the PCB. More...

status_t	xpath_add_to_result (xpath_result_t source, xpath_result_t target)
	Move the resnodes from 1 XPath result to another. More...

uint32	xpath_resnode_count (xpath_result_t *result)
	Get the number of resnodes in the node-set. More...

void	xpath_discard_resnode (xpath_resnode_t *resnode)
	Discard a result node. More...

void	xpath_clear_nodeset_result (xpath_result_t *result)
	Clear all the nodes from the node-set result. More...

xpath_pcb_t *	xpath_new_session_pcb (ses_cb_t scb, const xmlChar expr, status_t *res)
	Get a new XPath parser control block for a session. More...

void	xpath_set_load_import (xpath_pcb_t pcb, void yang_pcb)
	Set the PCB in load import mode. More...

void	xpath_clear_load_import (xpath_pcb_t *pcb)
	Clear the PCB out of load import mode. More...

void *	xpath_get_load_import (xpath_pcb_t *pcb)
	Get the PCB in load import mode. More...

boolean	xpath_need_get2_processing (xpath_result_t *result)
	Check if the result nodeset contains any XP_RNT_GET2 nodes. More...

const xmlChar *	xpath_get_restype_str (xpath_restype_t restype)
	Get the string for the specific result type. More...

void	xpath_set_keep_result (xpath_pcb_t *pcb)
	Set the keep-result flag in the PCB. More...

boolean	xpath_find_obj_in_result (xpath_result_t result, obj_template_t obj)
	Find the object pointer in the specified result. More...

boolean	xpath_expr_has_predicates (xpath_pcb_t *pcb)
	Check if any predicates parsed in the expression. More...

boolean	xpath_expr_scan_predicates (xpath_pcb_t *pcb)
	Check if any predicates parsed in the expression. More...

xpath_pred_ent_t *	xpath_new_pred_ent (obj_template_t keyobj, const xmlChar keyval)
	Malloc and init an XPath predicate entry struct. More...

void	xpath_free_pred_ent (xpath_pred_ent_t *ent)
	Free a malloced XPath predicate entry struct. More...

boolean	xpath_expr_ok_for_nolock_get (xpath_pcb_t *pcb)
	Check an XPath expression to see if it contains any top-level config=true data nodes or not. More...

xpath_resnode_t *	xpath_get_first_real_resnode (xpath_result_t *result)
	Get the first result in the renodeQ from a result struct. More...

boolean	xpath_result_is_get2 (xpath_result_t *result)
	Check if the result is a node-set for GET2 nodes. More...

status_t	xpath_set_result (xpath_pcb_t pcb, xpath_result_t result)
	Set the result field to save a result with the PCB. More...

xpath_result_t *	xpath_get_result (xpath_pcb_t *pcb)
	Get the result from a PCB. More...

status_t	xpath_make_load_path (const xmlChar target, xmlChar *retbuff)
	Convert the schema path string to the internal canonical format. More...

Detailed Description

Schema and data model Xpath search support.

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description