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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/yacc/symtab.c	Lines:	46	49	93.9 %
Date:	2017-11-07	Branches:	14	20	70.0 %


/* $OpenBSD: symtab.c,v 1.17 2014/03/13 00:56:39 tedu Exp $	 */
/* $NetBSD: symtab.c,v 1.4 1996/03/19 03:21:48 jtc Exp $	 */

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Paul Corbett.
 *
 * 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.
 */

#include "defs.h"

/* TABLE_SIZE is the number of entries in the symbol table. */
/* TABLE_SIZE must be a power of two.			    */

#define	TABLE_SIZE 1024


bucket **symbol_table;
bucket *first_symbol;
bucket *last_symbol;

int hash(char *);


int
hash(char *name)
{
	char *s;
	int c, k;

	assert(name && *name);
	s = name;
	k = *s;
	while ((c = *++s))
		k = (31 * k + c) & (TABLE_SIZE - 1);

	return (k);
}


bucket *
make_bucket(char *name)
{
	bucket *bp;

	assert(name);
	bp = malloc(sizeof(bucket));
	if (bp == NULL)
		no_space();
	bp->link = 0;
	bp->next = 0;
	bp->name = strdup(name);
	if (bp->name == NULL)
		no_space();
	bp->tag = 0;
	bp->value = UNDEFINED;
	bp->index = 0;
	bp->prec = 0;
	bp->class = UNKNOWN;
	bp->assoc = TOKEN;

	return (bp);
}


bucket *
lookup(char *name)
{
	bucket *bp, **bpp;

	bpp = symbol_table + hash(name);
	bp = *bpp;

	while (bp) {
		if (strcmp(name, bp->name) == 0)
			return (bp);
		bpp = &bp->link;
		bp = *bpp;
	}

	*bpp = bp = make_bucket(name);
	last_symbol->next = bp;
	last_symbol = bp;

	return (bp);
}


void
create_symbol_table(void)
{
	bucket *bp;

	symbol_table = calloc(TABLE_SIZE, sizeof(bucket *));
	if (symbol_table == NULL)
		no_space();

	bp = make_bucket("error");
	bp->index = 1;
	bp->class = TERM;

	first_symbol = bp;
	last_symbol = bp;
	symbol_table[hash("error")] = bp;
}


void
free_symbol_table(void)
{
	free(symbol_table);
	symbol_table = 0;
}


void
free_symbols(void)
{
	bucket *p, *q;

	for (p = first_symbol; p; p = q) {
		q = p->next;
		free(p);
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: symtab.c,v 1.17 2014/03/13 00:56:39 tedu Exp $ */
2			/* $NetBSD: symtab.c,v 1.4 1996/03/19 03:21:48 jtc Exp $ */
3
4			/*
5			* Copyright (c) 1989 The Regents of the University of California.
6			* All rights reserved.
7			*
8			* This code is derived from software contributed to Berkeley by
9			* Robert Paul Corbett.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include "defs.h"
37
38			/* TABLE_SIZE is the number of entries in the symbol table. */
39			/* TABLE_SIZE must be a power of two. */
40
41			#define TABLE_SIZE 1024
42
43
44			bucket **symbol_table;
45			bucket *first_symbol;
46			bucket *last_symbol;
47
48			int hash(char *);
49
50
51			int
52			hash(char *name)
53			{
54			char *s;
55			int c, k;
56
57	✓✗✗✓	17544	assert(name && *name);
58			s = name;
59			k = *s;
60	✓✓	83254	while ((c = *++s))
61		35779	k = (31 * k + c) & (TABLE_SIZE - 1);
62
63		5848	return (k);
64			}
65
66
67			bucket *
68			make_bucket(char *name)
69			{
70			bucket *bp;
71
72	✗✓	2926	assert(name);
73		1463	bp = malloc(sizeof(bucket));
74	✗✓	1463	if (bp == NULL)
75			no_space();
76		1463	bp->link = 0;
77		1463	bp->next = 0;
78		1463	bp->name = strdup(name);
79	✗✓	1463	if (bp->name == NULL)
80			no_space();
81		1463	bp->tag = 0;
82		1463	bp->value = UNDEFINED;
83		1463	bp->index = 0;
84		1463	bp->prec = 0;
85		1463	bp->class = UNKNOWN;
86		1463	bp->assoc = TOKEN;
87
88		1463	return (bp);
89			}
90
91
92			bucket *
93			lookup(char *name)
94			{
95			bucket bp, *bpp;
96
97		11666	bpp = symbol_table + hash(name);
98		5833	bp = *bpp;
99
100	✓✓	13120	while (bp) {
101	✓✓	5165	if (strcmp(name, bp->name) == 0)
102		4438	return (bp);
103		727	bpp = &bp->link;
104		727	bp = *bpp;
105			}
106
107		1395	*bpp = bp = make_bucket(name);
108		1395	last_symbol->next = bp;
109		1395	last_symbol = bp;
110
111		1395	return (bp);
112		5833	}
113
114
115			void
116			create_symbol_table(void)
117			{
118			bucket *bp;
119
120		30	symbol_table = calloc(TABLE_SIZE, sizeof(bucket *));
121	✗✓	15	if (symbol_table == NULL)
122			no_space();
123
124		15	bp = make_bucket("error");
125		15	bp->index = 1;
126		15	bp->class = TERM;
127
128		15	first_symbol = bp;
129		15	last_symbol = bp;
130		15	symbol_table[hash("error")] = bp;
131		15	}
132
133
134			void
135			free_symbol_table(void)
136			{
137		30	free(symbol_table);
138		15	symbol_table = 0;
139		15	}
140
141
142			void
143			free_symbols(void)
144			{
145			bucket p, q;
146
147	✓✓	2971	for (p = first_symbol; p; p = q) {
148		1463	q = p->next;
149		1463	free(p);
150			}
151		15	}