FM / isc

/usr/include/bind9/isc

Name	Size	Mode	Actions
aes.h	1080	0644	edit dl rm
app.h	10478	0644	edit dl rm
assertions.h	2907	0644	edit dl rm
atomic.h	4168	0644	edit dl rm
backtrace.h	3891	0644	edit dl rm
base32.h	4453	0644	edit dl rm
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bind9.h	830	0644	edit dl rm
boolean.h	594	0644	edit dl rm
buffer.h	26268	0644	edit dl rm
bufferlist.h	1452	0644	edit dl rm
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dir.h	1598	0644	edit dl rm
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errno.h	659	0644	edit dl rm
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json.h	1459	0644	edit dl rm
keyboard.h	989	0644	edit dl rm
lang.h	637	0644	edit dl rm
lex.h	9771	0644	edit dl rm
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lib.h	1068	0644	edit dl rm
likely.h	818	0644	edit dl rm
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log.h	28734	0644	edit dl rm
magic.h	994	0644	edit dl rm
md5.h	2380	0644	edit dl rm
mem.h	21110	0644	edit dl rm
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mutex.h	3524	0644	edit dl rm
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net.h	10534	0644	edit dl rm
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rwlock.h	3807	0644	edit dl rm
safe.h	1352	0644	edit dl rm
serial.h	1368	0644	edit dl rm
sha1.h	1556	0644	edit dl rm
sha2.h	5733	0644	edit dl rm
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sockaddr.h	6039	0644	edit dl rm
socket.h	36655	0644	edit dl rm
stat.h	806	0644	edit dl rm
stats.h	3709	0644	edit dl rm
stdatomic.h	5250	0644	edit dl rm
stdio.h	1787	0644	edit dl rm
stdlib.h	704	0644	edit dl rm
stdtime.h	1065	0644	edit dl rm
strerror.h	777	0644	edit dl rm
string.h	6019	0644	edit dl rm
symtab.h	4326	0644	edit dl rm
syslog.h	844	0644	edit dl rm
task.h	21544	0644	edit dl rm
taskpool.h	3709	0644	edit dl rm
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types.h	5780	0644	edit dl rm
utf8.h	928	0644	edit dl rm
util.h	10537	0644	edit dl rm
version.h	689	0644	edit dl rm
xml.h	1094	0644	edit dl rm

Edit: /usr/include/bind9/isc/symtab.h (4326B)

/*
 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
 *
 * See the COPYRIGHT file distributed with this work for additional
 * information regarding copyright ownership.
 */

#ifndef ISC_SYMTAB_H
#define ISC_SYMTAB_H 1

/*****
 ***** Module Info
 *****/

/*! \file isc/symtab.h
 * \brief Provides a simple memory-based symbol table.
 *
 * Keys are C strings, and key comparisons are case-insensitive.  A type may
 * be specified when looking up, defining, or undefining.  A type value of
 * 0 means "match any type"; any other value will only match the given
 * type.
 *
 * It's possible that a client will attempt to define a <key, type, value>
 * tuple when a tuple with the given key and type already exists in the table.
 * What to do in this case is specified by the client.  Possible policies are:
 *
 *\li	#isc_symexists_reject	Disallow the define, returning #ISC_R_EXISTS
 *\li	#isc_symexists_replace	Replace the old value with the new.  The
 *				undefine action (if provided) will be called
 *				with the old <key, type, value> tuple.
 *\li	#isc_symexists_add	Add the new tuple, leaving the old tuple in
 *				the table.  Subsequent lookups will retrieve
 *				the most-recently-defined tuple.
 *
 * A lookup of a key using type 0 will return the most-recently defined
 * symbol with that key.  An undefine of a key using type 0 will undefine the
 * most-recently defined symbol with that key.  Trying to define a key with
 * type 0 is illegal.
 *
 * The symbol table library does not make a copy the key field, so the
 * caller must ensure that any key it passes to isc_symtab_define() will not
 * change until it calls isc_symtab_undefine() or isc_symtab_destroy().
 *
 * A user-specified action will be called (if provided) when a symbol is
 * undefined.  It can be used to free memory associated with keys and/or
 * values.
 *
 * A symbol table is implemented as a hash table of lists; the size of the
 * hash table is set by the 'size' parameter to isc_symtbl_create().  When
 * the number of entries in the symbol table reaches three quarters of this
 * value, the hash table is reallocated with size doubled, in order to
 * optimize lookup performance.  This has a negative effect on insertion
 * performance, which can be mitigated by sizing the table appropriately
 * when creating it.
 *
 * \li MP:
 *	The callers of this module must ensure any required synchronization.
 *
 * \li Reliability:
 *	No anticipated impact.
 *
 * \li Resources:
 *	TBS
 *
 * \li Security:
 *	No anticipated impact.
 *
 * \li Standards:
 *	None.
 */

/***
 *** Imports.
 ***/

#include <stdbool.h>

#include <isc/lang.h>
#include <isc/types.h>

/*
 *** Symbol Tables.
 ***/
/*% Symbol table value. */
typedef union isc_symvalue {
	void *				as_pointer;
	const void *			as_cpointer;
	int				as_integer;
	unsigned int			as_uinteger;
} isc_symvalue_t;

typedef void (*isc_symtabaction_t)(char *key, unsigned int type,
				   isc_symvalue_t value, void *userarg);
/*% Symbol table exists. */
typedef enum {
	isc_symexists_reject = 0,	/*%< Disallow the define */
	isc_symexists_replace = 1,	/*%< Replace the old value with the new */
	isc_symexists_add = 2		/*%< Add the new tuple */
} isc_symexists_t;

ISC_LANG_BEGINDECLS

/*% Create a symbol table. */
isc_result_t
isc_symtab_create(isc_mem_t *mctx, unsigned int size,
		  isc_symtabaction_t undefine_action, void *undefine_arg,
		  bool case_sensitive, isc_symtab_t **symtabp);

/*% Destroy a symbol table. */
void
isc_symtab_destroy(isc_symtab_t **symtabp);

/*% Lookup a symbol table. */
isc_result_t
isc_symtab_lookup(isc_symtab_t *symtab, const char *key, unsigned int type,
		  isc_symvalue_t *value);

/*% Define a symbol table. */
isc_result_t
isc_symtab_define(isc_symtab_t *symtab, const char *key, unsigned int type,
		  isc_symvalue_t value, isc_symexists_t exists_policy);

/*% Undefine a symbol table. */
isc_result_t
isc_symtab_undefine(isc_symtab_t *symtab, const char *key, unsigned int type);

/*% Return the number of items in a symbol table. */
unsigned int
isc_symtab_count(isc_symtab_t *symtab);
ISC_LANG_ENDDECLS

#endif /* ISC_SYMTAB_H */

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