minix/external/bsd/byacc/dist/symtab.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

122 lines
1.9 KiB
C

/* $NetBSD: symtab.c,v 1.7 2013/04/06 14:52:24 christos Exp $ */
/* Id: symtab.c,v 1.10 2012/05/26 15:16:12 tom Exp */
#include "defs.h"
#include <sys/cdefs.h>
__RCSID("$NetBSD: symtab.c,v 1.7 2013/04/06 14:52:24 christos Exp $");
/* TABLE_SIZE is the number of entries in the symbol table. */
/* TABLE_SIZE must be a power of two. */
#define TABLE_SIZE 1024
static bucket **symbol_table = 0;
bucket *first_symbol;
bucket *last_symbol;
static int
hash(const char *name)
{
const char *s;
int c, k;
assert(name && *name);
s = name;
k = *s;
while ((c = *++s) != 0)
k = (31 * k + c) & (TABLE_SIZE - 1);
return (k);
}
bucket *
make_bucket(const char *name)
{
bucket *bp;
assert(name != 0);
bp = TMALLOC(bucket, 1);
NO_SPACE(bp);
bp->link = 0;
bp->next = 0;
bp->name = TMALLOC(char, strlen(name) + 1);
NO_SPACE(bp->name);
bp->tag = 0;
bp->value = UNDEFINED;
bp->index = 0;
bp->prec = 0;
bp->class = UNKNOWN;
bp->assoc = TOKEN;
strcpy(bp->name, name);
return (bp);
}
bucket *
lookup(const 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)
{
int i;
bucket *bp;
symbol_table = TMALLOC(bucket *, TABLE_SIZE);
NO_SPACE(symbol_table);
for (i = 0; i < TABLE_SIZE; i++)
symbol_table[i] = 0;
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);
}
}