[dragonfly.git] / usr.bin / m4 / look.c

/*	$OpenBSD: look.c,v 1.22 2010/09/07 19:58:09 marco Exp $	*/

/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ozan Yigit at York University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/usr.bin/m4/look.c,v 1.10 2012/11/17 01:54:24 svnexp Exp $
 */

/*
 * look.c
 * Facility: m4 macro processor
 * by: oz
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <ohash.h>
#include "mdef.h"
#include "stdd.h"
#include "extern.h"

static void *hash_alloc(size_t, void *);
static void hash_free(void *, size_t, void *);
static void *element_alloc(size_t, void *);
static void setup_definition(struct macro_definition *, const char *,
			     const char *);

static struct ohash_info macro_info = {
	offsetof(struct ndblock, name),
	NULL, hash_alloc, hash_free, element_alloc };

struct ohash macros;

/* Support routines for hash tables.  */
void *
hash_alloc(size_t s, __unused void *u)
{
	void *storage = xalloc(s, "hash alloc");
	if (storage)
		memset(storage, 0, s);
	return storage;
}

void
hash_free(void *p, __unused size_t s, __unused void *u)
{
	free(p);
}

void *
element_alloc(size_t s, __unused void *u)
{
	return xalloc(s, "element alloc");
}

void
init_macros(void)
{
	ohash_init(&macros, 10, &macro_info);
}

/*
 * find name in the hash table
 */
ndptr
lookup(const char *name)
{
	return ohash_find(&macros, ohash_qlookup(&macros, name));
}

struct macro_definition *
lookup_macro_definition(const char *name)
{
	ndptr p;

	p = ohash_find(&macros, ohash_qlookup(&macros, name));
	if (p)
		return p->d;
	else
		return NULL;
}

static void
setup_definition(struct macro_definition *d, const char *defn, const char *name)
{
	ndptr p;

	if (strncmp(defn, BUILTIN_MARKER, sizeof(BUILTIN_MARKER) - 1) == 0 &&
	    (p = macro_getbuiltin(defn + sizeof(BUILTIN_MARKER) - 1)) != NULL) {
		d->type = macro_builtin_type(p);
		d->defn = xstrdup(defn + sizeof(BUILTIN_MARKER) - 1);
	} else {
		if (!*defn)
			d->defn = __DECONST(char *, null);
		else
			d->defn = xstrdup(defn);
		d->type = MACRTYPE;
	}
	if (STREQ(name, defn))
		d->type |= RECDEF;
}

static ndptr
create_entry(const char *name)
{
	const char *end = NULL;
	unsigned int i;
	ndptr n;

	i = ohash_qlookupi(&macros, name, &end);
	n = ohash_find(&macros, i);
	if (n == NULL) {
		n = ohash_create_entry(&macro_info, name, &end);
		ohash_insert(&macros, i, n);
		n->trace_flags = FLAG_NO_TRACE;
		n->builtin_type = MACRTYPE;
		n->d = NULL;
	}
	return n;
}

void
macro_define(const char *name, const char *defn)
{
	ndptr n = create_entry(name);
	if (n->d != NULL) {
		if (n->d->defn != null)
			free(n->d->defn);
	} else {
		n->d = xalloc(sizeof(struct macro_definition), NULL);
		n->d->next = NULL;
	}
	setup_definition(n->d, defn, name);
}

void
macro_pushdef(const char *name, const char *defn)
{
	ndptr n;
	struct macro_definition *d;

	n = create_entry(name);
	d = xalloc(sizeof(struct macro_definition), NULL);
	d->next = n->d;
	n->d = d;
	setup_definition(n->d, defn, name);
}

void
macro_undefine(const char *name)
{
	ndptr n = lookup(name);
	if (n != NULL) {
		struct macro_definition *r, *r2;

		for (r = n->d; r != NULL; r = r2) {
			r2 = r->next;
			if (r->defn != null)
				free(r->defn);
			free(r);
		}
		n->d = NULL;
	}
}

void
macro_popdef(const char *name)
{
	ndptr n = lookup(name);

	if (n != NULL) {
		struct macro_definition *r = n->d;
		if (r != NULL) {
			n->d = r->next;
			if (r->defn != null)
				free(r->defn);
			free(r);
		}
	}
}

void
macro_for_all(void (*f)(const char *, struct macro_definition *))
{
	ndptr n;
	unsigned int i;

	for (n = ohash_first(&macros, &i); n != NULL;
	    n = ohash_next(&macros, &i))
		if (n->d != NULL)
			f(n->name, n->d);
}

void
setup_builtin(const char *name, unsigned int type)
{
	ndptr n;
	char *name2;

	if (prefix_builtins) {
		name2 = xalloc(strlen(name) + 3 + 1, NULL);
		memcpy(name2, "m4_", 3);
		memcpy(name2 + 3, name, strlen(name) + 1);
	} else
		name2 = xstrdup(name);

	n = create_entry(name2);
	n->builtin_type = type;
	n->d = xalloc(sizeof(struct macro_definition), NULL);
	n->d->defn = name2;
	n->d->type = type;
	n->d->next = NULL;
}

void
mark_traced(const char *name, int on)
{
	ndptr p;
	unsigned int i;

	if (name == NULL) {
		if (on)
			trace_flags |= TRACE_ALL;
		else
			trace_flags &= ~TRACE_ALL;
		for (p = ohash_first(&macros, &i); p != NULL;
		    p = ohash_next(&macros, &i))
			p->trace_flags = FLAG_NO_TRACE;
	} else {
		p = create_entry(name);
		p->trace_flags = on;
	}
}

ndptr
macro_getbuiltin(const char *name)
{
	ndptr p;

	p = lookup(name);
	if (p == NULL || p->builtin_type == MACRTYPE)
		return NULL;
	else
		return p;
}
Commit	Line	Data
4afad3d8 PA	1	/* $OpenBSD: look.c,v 1.22 2010/09/07 19:58:09 marco Exp $ */
4afad3d8 PA	2
984263bc MD	3	/*
	4	* Copyright (c) 1989, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* This code is derived from software contributed to Berkeley by
	8	* Ozan Yigit at York University.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
4afad3d8	18	* 3. Neither the name of the University nor the names of its contributors
984263bc MD	19	* may be used to endorse or promote products derived from this software
	20	* without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	* SUCH DAMAGE.
1de703da	33	*
4afad3d8	34	* $FreeBSD: src/usr.bin/m4/look.c,v 1.10 2012/11/17 01:54:24 svnexp Exp $
984263bc MD	35	*/
984263bc MD	36
984263bc MD	37	/*
	38	* look.c
	39	* Facility: m4 macro processor
	40	* by: oz
	41	*/
	42
	43	#include <sys/types.h>
	44	#include <stdio.h>
	45	#include <stdlib.h>
4afad3d8	46	#include <stdint.h>
984263bc MD	47	#include <stddef.h>
984263bc MD	48	#include <string.h>
4afad3d8	49	#include <ohash.h>
984263bc MD	50	#include "mdef.h"
	51	#include "stdd.h"
	52	#include "extern.h"
	53
4afad3d8 PA	54	static void hash_alloc(size_t, void );
	55	static void hash_free(void , size_t, void );
	56	static void element_alloc(size_t, void );
	57	static void setup_definition(struct macro_definition , const char ,
	58	const char *);
	59
	60	static struct ohash_info macro_info = {
	61	offsetof(struct ndblock, name),
	62	NULL, hash_alloc, hash_free, element_alloc };
	63
	64	struct ohash macros;
	65
	66	/* Support routines for hash tables. */
	67	void *
	68	hash_alloc(size_t s, __unused void *u)
	69	{
	70	void *storage = xalloc(s, "hash alloc");
	71	if (storage)
	72	memset(storage, 0, s);
	73	return storage;
	74	}
	75
	76	void
	77	hash_free(void p, __unused size_t s, __unused void u)
	78	{
	79	free(p);
	80	}
	81
	82	void *
	83	element_alloc(size_t s, __unused void *u)
	84	{
	85	return xalloc(s, "element alloc");
	86	}
984263bc	87
4afad3d8 PA	88	void
4afad3d8 PA	89	init_macros(void)
984263bc	90	{
4afad3d8	91	ohash_init(&macros, 10, &macro_info);
984263bc MD	92	}
	93
	94	/*
	95	* find name in the hash table
	96	*/
10c3f15b	97	ndptr
984263bc MD	98	lookup(const char *name)
984263bc MD	99	{
4afad3d8 PA	100	return ohash_find(&macros, ohash_qlookup(&macros, name));
	101	}
	102
	103	struct macro_definition *
	104	lookup_macro_definition(const char *name)
	105	{
984263bc	106	ndptr p;
984263bc	107
4afad3d8 PA	108	p = ohash_find(&macros, ohash_qlookup(&macros, name));
	109	if (p)
	110	return p->d;
	111	else
	112	return NULL;
984263bc MD	113	}
984263bc MD	114
4afad3d8 PA	115	static void
4afad3d8 PA	116	setup_definition(struct macro_definition d, const char defn, const char *name)
984263bc	117	{
984263bc MD	118	ndptr p;
984263bc MD	119
4afad3d8 PA	120	if (strncmp(defn, BUILTIN_MARKER, sizeof(BUILTIN_MARKER) - 1) == 0 &&
	121	(p = macro_getbuiltin(defn + sizeof(BUILTIN_MARKER) - 1)) != NULL) {
	122	d->type = macro_builtin_type(p);
	123	d->defn = xstrdup(defn + sizeof(BUILTIN_MARKER) - 1);
	124	} else {
	125	if (!*defn)
	126	d->defn = __DECONST(char *, null);
	127	else
	128	d->defn = xstrdup(defn);
	129	d->type = MACRTYPE;
	130	}
	131	if (STREQ(name, defn))
	132	d->type \|= RECDEF;
984263bc MD	133	}
984263bc MD	134
4afad3d8 PA	135	static ndptr
4afad3d8 PA	136	create_entry(const char *name)
984263bc	137	{
4afad3d8 PA	138	const char *end = NULL;
	139	unsigned int i;
	140	ndptr n;
	141
	142	i = ohash_qlookupi(&macros, name, &end);
	143	n = ohash_find(&macros, i);
	144	if (n == NULL) {
	145	n = ohash_create_entry(&macro_info, name, &end);
	146	ohash_insert(&macros, i, n);
	147	n->trace_flags = FLAG_NO_TRACE;
	148	n->builtin_type = MACRTYPE;
	149	n->d = NULL;
	150	}
	151	return n;
984263bc MD	152	}
984263bc MD	153
984263bc	154	void
4afad3d8 PA	155	macro_define(const char name, const char defn)
	156	{
	157	ndptr n = create_entry(name);
	158	if (n->d != NULL) {
	159	if (n->d->defn != null)
	160	free(n->d->defn);
	161	} else {
	162	n->d = xalloc(sizeof(struct macro_definition), NULL);
	163	n->d->next = NULL;
	164	}
	165	setup_definition(n->d, defn, name);
	166	}
	167
	168	void
	169	macro_pushdef(const char name, const char defn)
	170	{
	171	ndptr n;
	172	struct macro_definition *d;
	173
	174	n = create_entry(name);
	175	d = xalloc(sizeof(struct macro_definition), NULL);
	176	d->next = n->d;
	177	n->d = d;
	178	setup_definition(n->d, defn, name);
	179	}
	180
	181	void
	182	macro_undefine(const char *name)
	183	{
	184	ndptr n = lookup(name);
	185	if (n != NULL) {
	186	struct macro_definition r, r2;
	187
	188	for (r = n->d; r != NULL; r = r2) {
	189	r2 = r->next;
	190	if (r->defn != null)
	191	free(r->defn);
	192	free(r);
984263bc	193	}
4afad3d8 PA	194	n->d = NULL;
	195	}
	196	}
	197
	198	void
	199	macro_popdef(const char *name)
	200	{
	201	ndptr n = lookup(name);
	202
	203	if (n != NULL) {
	204	struct macro_definition *r = n->d;
	205	if (r != NULL) {
	206	n->d = r->next;
	207	if (r->defn != null)
	208	free(r->defn);
	209	free(r);
984263bc MD	210	}
	211	}
	212	}
4afad3d8 PA	213
	214	void
	215	macro_for_all(void (f)(const char , struct macro_definition *))
	216	{
	217	ndptr n;
	218	unsigned int i;
	219
	220	for (n = ohash_first(&macros, &i); n != NULL;
	221	n = ohash_next(&macros, &i))
	222	if (n->d != NULL)
	223	f(n->name, n->d);
	224	}
	225
	226	void
	227	setup_builtin(const char *name, unsigned int type)
	228	{
	229	ndptr n;
	230	char *name2;
	231
	232	if (prefix_builtins) {
	233	name2 = xalloc(strlen(name) + 3 + 1, NULL);
	234	memcpy(name2, "m4_", 3);
	235	memcpy(name2 + 3, name, strlen(name) + 1);
	236	} else
	237	name2 = xstrdup(name);
	238
	239	n = create_entry(name2);
	240	n->builtin_type = type;
	241	n->d = xalloc(sizeof(struct macro_definition), NULL);
	242	n->d->defn = name2;
	243	n->d->type = type;
	244	n->d->next = NULL;
	245	}
	246
	247	void
	248	mark_traced(const char *name, int on)
	249	{
	250	ndptr p;
	251	unsigned int i;
	252
	253	if (name == NULL) {
	254	if (on)
	255	trace_flags \|= TRACE_ALL;
	256	else
	257	trace_flags &= ~TRACE_ALL;
	258	for (p = ohash_first(&macros, &i); p != NULL;
	259	p = ohash_next(&macros, &i))
	260	p->trace_flags = FLAG_NO_TRACE;
	261	} else {
	262	p = create_entry(name);
	263	p->trace_flags = on;
	264	}
	265	}
	266
	267	ndptr
	268	macro_getbuiltin(const char *name)
	269	{
	270	ndptr p;
	271
	272	p = lookup(name);
	273	if (p == NULL \|\| p->builtin_type == MACRTYPE)
	274	return NULL;
	275	else
	276	return p;
277	}