/*

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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")

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*

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* This Source Code Form is subject to the terms of the Mozilla Public

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* License, v. 2.0. If a copy of the MPL was not distributed with this

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* file, you can obtain one at https://mozilla.org/MPL/2.0/.

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*

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* See the COPYRIGHT file distributed with this work for additional

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* information regarding copyright ownership.

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*/

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#ifndef ISCCFG_GRAMMAR_H

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#define ISCCFG_GRAMMAR_H 1

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/*! \file isccfg/grammar.h */

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#include <inttypes.h>

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#include <stdbool.h>

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#include <isc/lex.h>

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#include <isc/netaddr.h>

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#include <isc/refcount.h>

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#include <isc/sockaddr.h>

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#include <isc/region.h>

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#include <isc/types.h>

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#include <isccfg/cfg.h>

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/*

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* Definitions shared between the configuration parser

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* and the grammars; not visible to users of the parser.

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*/

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/*% Clause may occur multiple times (e.g., "zone") */

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#define CFG_CLAUSEFLAG_MULTI 0x00000001

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/*% Clause is obsolete */

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#define CFG_CLAUSEFLAG_OBSOLETE 0x00000002

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/*% Clause is not implemented, and may never be */

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#define CFG_CLAUSEFLAG_NOTIMP 0x00000004

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/*% Clause is not implemented yet */

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#define CFG_CLAUSEFLAG_NYI 0x00000008

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/*% Default value has changed since earlier release */

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#define CFG_CLAUSEFLAG_NEWDEFAULT 0x00000010

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/*%

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* Clause needs to be interpreted during parsing

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* by calling a callback function, like the

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* "directory" option.

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*/

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#define CFG_CLAUSEFLAG_CALLBACK 0x00000020

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/*% A option that is only used in testing. */

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#define CFG_CLAUSEFLAG_TESTONLY 0x00000040

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/*% A configuration option that was not configured at compile time. */

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#define CFG_CLAUSEFLAG_NOTCONFIGURED 0x00000080

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/*% A option for a experimental feature. */

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#define CFG_CLAUSEFLAG_EXPERIMENTAL 0x00000100

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/*% A configuration option that is ineffective due to

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* compile time options, but is harmless. */

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#define CFG_CLAUSEFLAG_NOOP 0x00000200

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/*% Clause is obsolete in a future release */

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#define CFG_CLAUSEFLAG_DEPRECATED 0x00000400

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/*%

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* Zone types for which a clause is valid:

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* These share space with CFG_CLAUSEFLAG values, but count

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* down from the top.

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*/

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#define CFG_ZONE_MASTER 0x80000000

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#define CFG_ZONE_SLAVE 0x40000000

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#define CFG_ZONE_STUB 0x20000000

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#define CFG_ZONE_HINT 0x10000000

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#define CFG_ZONE_FORWARD 0x08000000

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#define CFG_ZONE_STATICSTUB 0x04000000

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#define CFG_ZONE_REDIRECT 0x02000000

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#define CFG_ZONE_DELEGATION 0x01000000

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#define CFG_ZONE_INVIEW 0x00800000

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typedef struct cfg_clausedef cfg_clausedef_t;

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typedef struct cfg_tuplefielddef cfg_tuplefielddef_t;

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typedef struct cfg_printer cfg_printer_t;

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typedef ISC_LIST(cfg_listelt_t) cfg_list_t;

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typedef struct cfg_map cfg_map_t;

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typedef struct cfg_rep cfg_rep_t;

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/*

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* Function types for configuration object methods

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*/

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typedef isc_result_t (*cfg_parsefunc_t)(cfg_parser_t *, const cfg_type_t *type,

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cfg_obj_t **);

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typedef void (*cfg_printfunc_t)(cfg_printer_t *, const cfg_obj_t *);

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typedef void (*cfg_docfunc_t)(cfg_printer_t *, const cfg_type_t *);

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typedef void (*cfg_freefunc_t)(cfg_parser_t *, cfg_obj_t *);

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/*

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* Structure definitions

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*/

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/*%

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* A configuration printer object. This is an abstract

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* interface to a destination to which text can be printed

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* by calling the function 'f'.

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*/

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struct cfg_printer {

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void (*f)(void *closure, const char *text, int textlen);

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void *closure;

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int indent;

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int flags;

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};

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/*% A clause definition. */

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struct cfg_clausedef {

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const char *name;

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cfg_type_t *type;

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unsigned int flags;

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};

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/*% A tuple field definition. */

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struct cfg_tuplefielddef {

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const char *name;

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cfg_type_t *type;

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unsigned int flags;

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};

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/*% A configuration object type definition. */

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struct cfg_type {

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const char *name; /*%< For debugging purposes only */

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cfg_parsefunc_t parse;

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cfg_printfunc_t print;

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cfg_docfunc_t doc; /*%< Print grammar description */

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cfg_rep_t * rep; /*%< Data representation */

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const void * of; /*%< Additional data for meta-types */

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};

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/*% A keyword-type definition, for things like "port <integer>". */

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typedef struct {

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const char *name;

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const cfg_type_t *type;

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} keyword_type_t;

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struct cfg_map {

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cfg_obj_t *id; /*%< Used for 'named maps' like keys, zones, &c */

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const cfg_clausedef_t * const *clausesets; /*%< The clauses that

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can occur in this map;

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used for printing */

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isc_symtab_t *symtab;

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};

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typedef struct cfg_netprefix cfg_netprefix_t;

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struct cfg_netprefix {

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isc_netaddr_t address; /* IP4/IP6 */

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unsigned int prefixlen;

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};

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/*%

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* A configuration data representation.

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*/

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struct cfg_rep {

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const char * name; /*%< For debugging only */

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cfg_freefunc_t free; /*%< How to free this kind of data. */

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};

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/*%

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* A configuration object. This is the main building block

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* of the configuration parse tree.

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*/

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struct cfg_obj {

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const cfg_type_t *type;

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union {

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uint32_t uint32;

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uint64_t uint64;

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isc_textregion_t string; /*%< null terminated, too */

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bool boolean;

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cfg_map_t map;

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cfg_list_t list;

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cfg_obj_t ** tuple;

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isc_sockaddr_t sockaddr;

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struct {

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isc_sockaddr_t sockaddr;

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isc_dscp_t dscp;

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} sockaddrdscp;

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cfg_netprefix_t netprefix;

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} value;

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isc_refcount_t references; /*%< reference counter */

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const char * file;

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unsigned int line;

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cfg_parser_t * pctx;

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};

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/*% A list element. */

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struct cfg_listelt {

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cfg_obj_t *obj;

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ISC_LINK(cfg_listelt_t) link;

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};

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/*% The parser object. */

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struct cfg_parser {

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isc_mem_t * mctx;

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isc_log_t * lctx;

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isc_lex_t * lexer;

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unsigned int errors;

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unsigned int warnings;

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isc_token_t token;

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/*% We are at the end of all input. */

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bool seen_eof;

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/*% The current token has been pushed back. */

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bool ungotten;

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/*%

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* The stack of currently active files, represented

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* as a configuration list of configuration strings.

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* The head is the top-level file, subsequent elements

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* (if any) are the nested include files, and the

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* last element is the file currently being parsed.

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*/

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cfg_obj_t * open_files;

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/*%

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* Names of files that we have parsed and closed

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* and were previously on the open_file list.

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* We keep these objects around after closing

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* the files because the file names may still be

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* referenced from other configuration objects

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* for use in reporting semantic errors after

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* parsing is complete.

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*/

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cfg_obj_t * closed_files;

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/*%

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* Name of a buffer being parsed; used only for

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* logging.

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*/

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char const * buf_name;

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/*%

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* Current line number. We maintain our own

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* copy of this so that it is available even

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* when a file has just been closed.

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*/

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unsigned int line;

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/*%

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* Parser context flags, used for maintaining state

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* from one token to the next.

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*/

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unsigned int flags;

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/*%< Reference counter */

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isc_refcount_t references;

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cfg_parsecallback_t callback;

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void *callbackarg;

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};

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/* Parser context flags */

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#define CFG_PCTX_SKIP 0x1

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#define CFG_PCTX_NODEPRECATED 0x2

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/*@{*/

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/*%

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* Flags defining whether to accept certain types of network addresses.

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*/

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#define CFG_ADDR_V4OK 0x00000001

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#define CFG_ADDR_V4PREFIXOK 0x00000002

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#define CFG_ADDR_V6OK 0x00000004

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#define CFG_ADDR_WILDOK 0x00000008

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#define CFG_ADDR_DSCPOK 0x00000010

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#define CFG_ADDR_MASK (CFG_ADDR_V6OK|CFG_ADDR_V4OK)

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/*@}*/

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/*@{*/

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/*%

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* Predefined data representation types.

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*/

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_uint32;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_uint64;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_string;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_boolean;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_map;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_list;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_tuple;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_sockaddr;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_netprefix;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_void;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_fixedpoint;

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LIBISCCFG_EXTERNAL_DATA extern cfg_rep_t cfg_rep_percentage;

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/*@}*/

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/*@{*/

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/*%

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* Predefined configuration object types.

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*/

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_boolean;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_uint32;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_uint64;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_qstring;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_astring;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_ustring;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_sstring;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_bracketed_text;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_sockaddr;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_sockaddrdscp;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_netaddr;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_netaddr4;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_netaddr4wild;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_netaddr6;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_netaddr6wild;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_netprefix;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_void;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_token;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_unsupported;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_fixedpoint;

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LIBISCCFG_EXTERNAL_DATA extern cfg_type_t cfg_type_percentage;

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/*@}*/

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isc_result_t

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cfg_gettoken(cfg_parser_t *pctx, int options);

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isc_result_t

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cfg_peektoken(cfg_parser_t *pctx, int options);

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void

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cfg_ungettoken(cfg_parser_t *pctx);

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#define CFG_LEXOPT_QSTRING (ISC_LEXOPT_QSTRING | ISC_LEXOPT_QSTRINGMULTILINE)

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isc_result_t

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cfg_create_obj(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **objp);

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void

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cfg_print_rawuint(cfg_printer_t *pctx, unsigned int u);

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isc_result_t

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cfg_parse_uint32(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_print_uint32(cfg_printer_t *pctx, const cfg_obj_t *obj);

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void

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cfg_print_uint64(cfg_printer_t *pctx, const cfg_obj_t *obj);

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isc_result_t

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cfg_parse_qstring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_print_ustring(cfg_printer_t *pctx, const cfg_obj_t *obj);

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isc_result_t

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cfg_parse_astring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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isc_result_t

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cfg_parse_sstring(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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isc_result_t

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cfg_parse_rawaddr(cfg_parser_t *pctx, unsigned int flags, isc_netaddr_t *na);

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void

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cfg_print_rawaddr(cfg_printer_t *pctx, const isc_netaddr_t *na);

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bool

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cfg_lookingat_netaddr(cfg_parser_t *pctx, unsigned int flags);

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isc_result_t

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cfg_parse_rawport(cfg_parser_t *pctx, unsigned int flags, in_port_t *port);

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isc_result_t

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cfg_parse_dscp(cfg_parser_t *pctx, isc_dscp_t *dscp);

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isc_result_t

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cfg_parse_sockaddr(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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isc_result_t

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cfg_parse_boolean(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_print_sockaddr(cfg_printer_t *pctx, const cfg_obj_t *obj);

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void

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cfg_print_boolean(cfg_printer_t *pctx, const cfg_obj_t *obj);

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void

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cfg_doc_sockaddr(cfg_printer_t *pctx, const cfg_type_t *type);

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isc_result_t

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cfg_parse_netprefix(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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isc_result_t

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cfg_parse_special(cfg_parser_t *pctx, int special);

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/*%< Parse a required special character 'special'. */

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isc_result_t

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cfg_create_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **objp);

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isc_result_t

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cfg_parse_tuple(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_print_tuple(cfg_printer_t *pctx, const cfg_obj_t *obj);

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void

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cfg_doc_tuple(cfg_printer_t *pctx, const cfg_type_t *type);

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isc_result_t

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cfg_create_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **objp);

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isc_result_t

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cfg_parse_listelt(cfg_parser_t *pctx, const cfg_type_t *elttype,

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cfg_listelt_t **ret);

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isc_result_t

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cfg_parse_bracketed_list(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_print_bracketed_list(cfg_printer_t *pctx, const cfg_obj_t *obj);

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void

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cfg_doc_bracketed_list(cfg_printer_t *pctx, const cfg_type_t *type);

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isc_result_t

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cfg_parse_spacelist(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_print_spacelist(cfg_printer_t *pctx, const cfg_obj_t *obj);

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isc_result_t

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cfg_parse_enum(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

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void

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cfg_doc_enum(cfg_printer_t *pctx, const cfg_type_t *type);

[432] Fix | Delete

[433] Fix | Delete

void

[434] Fix | Delete

cfg_print_chars(cfg_printer_t *pctx, const char *text, int len);

[435] Fix | Delete

/*%< Print 'len' characters at 'text' */

[436] Fix | Delete

[437] Fix | Delete

void

[438] Fix | Delete

cfg_print_cstr(cfg_printer_t *pctx, const char *s);

[439] Fix | Delete

/*%< Print the null-terminated string 's' */

[440] Fix | Delete

[441] Fix | Delete

isc_result_t

[442] Fix | Delete

cfg_parse_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

[443] Fix | Delete

[444] Fix | Delete

isc_result_t

[445] Fix | Delete

cfg_parse_named_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

[446] Fix | Delete

[447] Fix | Delete

isc_result_t

[448] Fix | Delete

cfg_parse_addressed_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

[449] Fix | Delete

[450] Fix | Delete

isc_result_t

[451] Fix | Delete

cfg_parse_netprefix_map(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **

[452] Fix | Delete

ret);

[453] Fix | Delete

[454] Fix | Delete

void

[455] Fix | Delete

cfg_print_map(cfg_printer_t *pctx, const cfg_obj_t *obj);

[456] Fix | Delete

[457] Fix | Delete

void

[458] Fix | Delete

cfg_doc_map(cfg_printer_t *pctx, const cfg_type_t *type);

[459] Fix | Delete

[460] Fix | Delete

isc_result_t

[461] Fix | Delete

cfg_parse_mapbody(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

[462] Fix | Delete

[463] Fix | Delete

void

[464] Fix | Delete

cfg_print_mapbody(cfg_printer_t *pctx, const cfg_obj_t *obj);

[465] Fix | Delete

[466] Fix | Delete

void

[467] Fix | Delete

cfg_doc_mapbody(cfg_printer_t *pctx, const cfg_type_t *type);

[468] Fix | Delete

[469] Fix | Delete

isc_result_t

[470] Fix | Delete

cfg_parse_void(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

[471] Fix | Delete

[472] Fix | Delete

void

[473] Fix | Delete

cfg_print_void(cfg_printer_t *pctx, const cfg_obj_t *obj);

[474] Fix | Delete

[475] Fix | Delete

void

[476] Fix | Delete

cfg_doc_void(cfg_printer_t *pctx, const cfg_type_t *type);

[477] Fix | Delete

[478] Fix | Delete

isc_result_t

[479] Fix | Delete

cfg_parse_fixedpoint(cfg_parser_t *pctx, const cfg_type_t *type,

[480] Fix | Delete

cfg_obj_t **ret);

[481] Fix | Delete

[482] Fix | Delete

void

[483] Fix | Delete

cfg_print_fixedpoint(cfg_printer_t *pctx, const cfg_obj_t *obj);

[484] Fix | Delete

[485] Fix | Delete

isc_result_t

[486] Fix | Delete

cfg_parse_percentage(cfg_parser_t *pctx, const cfg_type_t *type,

[487] Fix | Delete

cfg_obj_t **ret);

[488] Fix | Delete

[489] Fix | Delete

void

[490] Fix | Delete

cfg_print_percentage(cfg_printer_t *pctx, const cfg_obj_t *obj);

[491] Fix | Delete

[492] Fix | Delete

isc_result_t

[493] Fix | Delete

cfg_parse_obj(cfg_parser_t *pctx, const cfg_type_t *type, cfg_obj_t **ret);

[494] Fix | Delete

[495] Fix | Delete

void

[496] Fix | Delete

cfg_print_obj(cfg_printer_t *pctx, const cfg_obj_t *obj);

[497] Fix | Delete

[498] Fix | Delete

void

[499] Fix | Delete