Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/m4/look.c	Lines:	90	124	72.6 %
Date:	2017-11-13	Branches:	35	60	58.3 %


/*	$OpenBSD: look.c,v 1.24 2014/12/21 09:33:12 espie 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.
 */

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

#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_calloc(size_t, size_t, void *);
static void hash_free(void *, void *);
static void *element_alloc(size_t, void *);
static void setup_definition(struct macro_definition *, const char *,
    const char *);
static void free_definition(char *);
static void keep(char *);
static int string_in_use(const char *);

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

struct ohash macros;

/* Support routines for hash tables.  */
void *
hash_calloc(size_t n, size_t s, void *u UNUSED)
{
	void *storage = xcalloc(n, s, "hash alloc");
	return storage;
}

void
hash_free(void *p, void *u UNUSED)
{
	free(p);
}

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

void
init_macros()
{
	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 = 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_definition(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;
}

/* XXX things are slightly more complicated than they seem.
 * a macro may actually be "live" (in the middle of an expansion
 * on the stack.
 * So we actually may need to place it in an array for later...
 */

static int kept_capacity = 0;
static int kept_size = 0;
static char **kept = NULL;

static void
keep(char *ptr)
{
	if (kept_capacity <= kept_size) {
		if (kept_capacity)
			kept_capacity *= 2;
		else
			kept_capacity = 50;
		kept = xreallocarray(kept, kept_capacity,
		    sizeof(char *), "Out of memory while saving %d strings\n",
		    kept_capacity);
	}
	kept[kept_size++] = ptr;
}

static int
string_in_use(const char *ptr)
{
	int i;
	for (i = 0; i <= sp; i++) {
		if (sstack[i] == STORAGE_MACRO && mstack[i].sstr == ptr)
			return 1;
		}
	return 0;
}


static void
free_definition(char *ptr)
{
	int i;

	/* first try to free old strings */
	for (i = 0; i < kept_size; i++) {
		if (!string_in_use(kept[i])) {
			kept_size--;
			free(kept[i]);
			if (i != kept_size)
				kept[i] = kept[kept_size];
			i--;
		}
	}

	/* then deal with us */
	if (string_in_use(ptr))
		keep(ptr);
	else
		free(ptr);
}



Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: look.c,v 1.24 2014/12/21 09:33:12 espie Exp $ */
2
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.
18			* 3. Neither the name of the University nor the names of its contributors
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.
33			*/
34
35			/*
36			* look.c
37			* Facility: m4 macro processor
38			* by: oz
39			*/
40
41			#include <stdio.h>
42			#include <stdlib.h>
43			#include <stdint.h>
44			#include <stddef.h>
45			#include <string.h>
46			#include <ohash.h>
47			#include "mdef.h"
48			#include "stdd.h"
49			#include "extern.h"
50
51			static void hash_calloc(size_t, size_t, void );
52			static void hash_free(void , void );
53			static void element_alloc(size_t, void );
54			static void setup_definition(struct macro_definition , const char ,
55			const char *);
56			static void free_definition(char *);
57			static void keep(char *);
58			static int string_in_use(const char *);
59
60			static struct ohash_info macro_info = {
61			offsetof(struct ndblock, name),
62			NULL, hash_calloc, hash_free, element_alloc };
63
64			struct ohash macros;
65
66			/* Support routines for hash tables. */
67			void *
68			hash_calloc(size_t n, size_t s, void *u UNUSED)
69			{
70		378	void *storage = xcalloc(n, s, "hash alloc");
71		189	return storage;
72			}
73
74			void
75			hash_free(void p, void u UNUSED)
76			{
77			free(p);
78			}
79
80			void *
81			element_alloc(size_t s, void *u UNUSED)
82			{
83		17608	return xalloc(s, "element alloc");
84			}
85
86			void
87			init_macros()
88			{
89		378	ohash_init(&macros, 10, &macro_info);
90		189	}
91
92			/*
93			* find name in the hash table
94			*/
95			ndptr
96			lookup(const char *name)
97			{
98		130	return ohash_find(&macros, ohash_qlookup(&macros, name));
99			}
100
101			struct macro_definition *
102			lookup_macro_definition(const char *name)
103			{
104			ndptr p;
105
106		1136	p = ohash_find(&macros, ohash_qlookup(&macros, name));
107	✓✓	568	if (p)
108		222	return p->d;
109			else
110		346	return NULL;
111		568	}
112
113			static void
114			setup_definition(struct macro_definition d, const char defn, const char *name)
115			{
116			ndptr p;
117
118	✓✓✓✗	925	if (strncmp(defn, BUILTIN_MARKER, sizeof(BUILTIN_MARKER)-1) == 0 &&
119		25	(p = macro_getbuiltin(defn+sizeof(BUILTIN_MARKER)-1)) != NULL) {
120		25	d->type = macro_builtin_type(p);
121		25	d->defn = xstrdup(defn+sizeof(BUILTIN_MARKER)-1);
122		25	} else {
123	✓✓	425	if (!*defn)
124		66	d->defn = null;
125			else
126		359	d->defn = xstrdup(defn);
127		425	d->type = MACRTYPE;
128			}
129	✓✓✗✓	454	if (STREQ(name, defn))
130			d->type \|= RECDEF;
131		450	}
132
133			static ndptr
134			create_entry(const char *name)
135			{
136		17632	const char *end = NULL;
137			unsigned int i;
138			ndptr n;
139
140		8816	i = ohash_qlookupi(&macros, name, &end);
141		8816	n = ohash_find(&macros, i);
142	✓✓	8816	if (n == NULL) {
143		8804	n = ohash_create_entry(&macro_info, name, &end);
144		8804	ohash_insert(&macros, i, n);
145		8804	n->trace_flags = FLAG_NO_TRACE;
146		8804	n->builtin_type = MACRTYPE;
147		8804	n->d = NULL;
148		8804	}
149		8816	return n;
150		8816	}
151
152			void
153			macro_define(const char name, const char defn)
154			{
155		900	ndptr n = create_entry(name);
156	✓✓	450	if (n->d != NULL) {
157	✓✓	7	if (n->d->defn != null)
158		5	free_definition(n->d->defn);
159			} else {
160		443	n->d = xalloc(sizeof(struct macro_definition), NULL);
161		443	n->d->next = NULL;
162			}
163		450	setup_definition(n->d, defn, name);
164		450	}
165
166			void
167			macro_pushdef(const char name, const char defn)
168			{
169			ndptr n;
170			struct macro_definition *d;
171
172			n = create_entry(name);
173			d = xalloc(sizeof(struct macro_definition), NULL);
174			d->next = n->d;
175			n->d = d;
176			setup_definition(n->d, defn, name);
177			}
178
179			void
180			macro_undefine(const char *name)
181			{
182		60	ndptr n = lookup(name);
183	✓✗	30	if (n != NULL) {
184			struct macro_definition r, r2;
185
186	✓✓	120	for (r = n->d; r != NULL; r = r2) {
187		30	r2 = r->next;
188	✓✗	30	if (r->defn != null)
189		30	free(r->defn);
190		30	free(r);
191			}
192		30	n->d = NULL;
193		30	}
194		30	}
195
196			void
197			macro_popdef(const char *name)
198			{
199			ndptr n = lookup(name);
200
201			if (n != NULL) {
202			struct macro_definition *r = n->d;
203			if (r != NULL) {
204			n->d = r->next;
205			if (r->defn != null)
206			free(r->defn);
207			free(r);
208			}
209			}
210			}
211
212			void
213			macro_for_all(void (f)(const char , struct macro_definition *))
214			{
215			ndptr n;
216		20	unsigned int i;
217
218	✓✓	900	for (n = ohash_first(&macros, &i); n != NULL;
219		440	n = ohash_next(&macros, &i))
220	✓✓	440	if (n->d != NULL)
221		435	f(n->name, n->d);
222		10	}
223
224			void
225			setup_builtin(const char *name, unsigned int type)
226			{
227			ndptr n;
228			char *name2;
229
230	✓✓	16732	if (prefix_builtins) {
231		396	name2 = xalloc(strlen(name)+3+1, NULL);
232		396	memcpy(name2, "m4_", 3);
233		396	memcpy(name2 + 3, name, strlen(name)+1);
234		396	} else
235		7970	name2 = xstrdup(name);
236
237		8366	n = create_entry(name2);
238		8366	n->builtin_type = type;
239		8366	n->d = xalloc(sizeof(struct macro_definition), NULL);
240		8366	n->d->defn = name2;
241		8366	n->d->type = type;
242		8366	n->d->next = NULL;
243		8366	}
244
245			void
246			mark_traced(const char *name, int on)
247			{
248			ndptr p;
249			unsigned int i;
250
251			if (name == NULL) {
252			if (on)
253			trace_flags \|= TRACE_ALL;
254			else
255			trace_flags &= ~TRACE_ALL;
256			for (p = ohash_first(&macros, &i); p != NULL;
257			p = ohash_next(&macros, &i))
258			p->trace_flags = FLAG_NO_TRACE;
259			} else {
260			p = create_entry(name);
261			p->trace_flags = on;
262			}
263			}
264
265			ndptr
266			macro_getbuiltin(const char *name)
267			{
268			ndptr p;
269
270		50	p = lookup(name);
271	✓✗✗✓	50	if (p == NULL \|\| p->builtin_type == MACRTYPE)
272			return NULL;
273			else
274		25	return p;
275		25	}
276
277			/* XXX things are slightly more complicated than they seem.
278			* a macro may actually be "live" (in the middle of an expansion
279			* on the stack.
280			* So we actually may need to place it in an array for later...
281			*/
282
283			static int kept_capacity = 0;
284			static int kept_size = 0;
285			static char **kept = NULL;
286
287			static void
288			keep(char *ptr)
289			{
290	✓✗	10	if (kept_capacity <= kept_size) {
291		10	if (kept_capacity)
292		5	kept_capacity *= 2;
293			else
294			kept_capacity = 50;
295		5	kept = xreallocarray(kept, kept_capacity,
296			sizeof(char *), "Out of memory while saving %d strings\n",
297			kept_capacity);
298		5	}
299		5	kept[kept_size++] = ptr;
300		5	}
301
302			static int
303			string_in_use(const char *ptr)
304			{
305			int i;
306	✓✗	55	for (i = 0; i <= sp; i++) {
307	✓✓✓✗	30	if (sstack[i] == STORAGE_MACRO && mstack[i].sstr == ptr)
308		5	return 1;
309			}
310			return 0;
311		5	}
312
313
314			static void
315			free_definition(char *ptr)
316			{
317			int i;
318
319			/* first try to free old strings */
320	✗✓	15	for (i = 0; i < kept_size; i++) {
321			if (!string_in_use(kept[i])) {
322			kept_size--;
323			free(kept[i]);
324			if (i != kept_size)
325			kept[i] = kept[kept_size];
326			i--;
327			}
328			}
329
330			/* then deal with us */
331	✓✗	5	if (string_in_use(ptr))
332		5	keep(ptr);
333			else
334			free(ptr);
335		5	}
336