GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/rdist/lookup.c Lines: 0 50 0.0 %
Date: 2017-11-13 Branches: 0 39 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: lookup.c,v 1.15 2015/01/20 09:00:16 guenther Exp $	*/
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/*
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 * Copyright (c) 1983 Regents of the University of California.
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <string.h>
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#include "client.h"
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	/* symbol types */
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#define VAR	1
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#define CONST	2
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struct syment {
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	int	s_type;
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	char	*s_name;
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	struct	namelist *s_value;
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	struct	syment *s_next;
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};
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static struct syment *hashtab[HASHSIZE];
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/*
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 * Define a variable from a command line argument.
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 */
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void
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define(char *name)
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{
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	char *cp, *s;
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	struct namelist *nl;
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	struct namelist *value;
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	debugmsg(DM_CALL, "define(%s)", name);
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	cp = strchr(name, '=');
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	if (cp == NULL)
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		value = NULL;
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	else if (cp[1] == '\0') {
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		*cp = '\0';
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		value = NULL;
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	} else if (cp[1] != '(') {
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		*cp++ = '\0';
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		value = makenl(cp);
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	} else {
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		value = NULL;
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		nl = NULL;
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		*cp++ = '\0';
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		do
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			cp++;
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		while (*cp == ' ' || *cp == '\t');
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		for (s = cp; ; s++) {
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			switch (*s) {
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			case ')':
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				*s = '\0';
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			case '\0':
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				break;
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			case ' ':
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			case '\t':
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				*s++ = '\0';
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				while (*s == ' ' || *s == '\t')
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					s++;
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				if (*s == ')')
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					*s = '\0';
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				break;
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			default:
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				continue;
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			}
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			if (nl == NULL)
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				value = nl = makenl(cp);
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			else {
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				nl->n_next = makenl(cp);
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				nl = nl->n_next;
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			}
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			if (*s == '\0')
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				break;
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			cp = s;
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		}
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	}
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	(void) lookup(name, REPLACE, value);
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}
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/*
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 * Lookup name in the table and return a pointer to it.
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 * LOOKUP - just do lookup, return NULL if not found.
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 * INSERT - insert name with value, error if already defined.
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 * REPLACE - insert or replace name with value.
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 */
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struct namelist *
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lookup(char *name, int action, struct namelist *value)
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{
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	unsigned int n;
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	char *cp;
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	struct syment *s;
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	char ebuf[BUFSIZ];
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	debugmsg(DM_CALL, "lookup(%s, %d, %p)", name, action, value);
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	n = 0;
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	for (cp = name; *cp; )
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		n += *cp++;
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	n %= HASHSIZE;
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	for (s = hashtab[n]; s != NULL; s = s->s_next) {
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		if (strcmp(name, s->s_name))
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			continue;
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		if (action != LOOKUP) {
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			if (action != INSERT || s->s_type != CONST) {
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				(void) snprintf(ebuf, sizeof(ebuf),
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					        "%.*s redefined",
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					        (int)(sizeof(ebuf) -
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					        sizeof(" redefined")), name);
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				yyerror(ebuf);
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			}
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		}
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		return(s->s_value);
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	}
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	if (action == LOOKUP) {
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		(void) snprintf(ebuf, sizeof(ebuf), "%.*s undefined",
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			        (int)(sizeof(ebuf) - sizeof(" undefined")),
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				name);
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		yyerror(ebuf);
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		return(NULL);
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	}
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	s = ALLOC(syment);
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	s->s_next = hashtab[n];
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	hashtab[n] = s;
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	s->s_type = action == INSERT ? VAR : CONST;
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	s->s_name = name;
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	s->s_value = value;
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	return(value);
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}