* Copyright (c) 1983 Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
static char sccsid
[] = "@(#)lookup.c 5.3 (Berkeley) %G%";
struct namelist
*s_value
;
static struct syment
*hashtab
[HASHSIZE
];
* Define a variable from a command line argument.
register struct namelist
*nl
;
printf("define(%s)\n", name
);
else if (cp
[1] == '\0') {
} else if (cp
[1] != '(') {
while (*cp
== ' ' || *cp
== '\t');
while (*s
== ' ' || *s
== '\t')
(void) lookup(name
, REPLACE
, value
);
* Lookup name in the table and return a pointer to it.
* LOOKUP - just do lookup, return NULL if not found.
* INSERT - insert name with value, error if already defined.
* REPLACE - insert or replace name with value.
lookup(name
, action
, value
)
register struct syment
*s
;
printf("lookup(%s, %d, %x)\n", name
, action
, value
);
for (s
= hashtab
[n
]; s
!= NULL
; s
= s
->s_next
) {
if (strcmp(name
, s
->s_name
))
if (action
!= INSERT
|| s
->s_type
!= CONST
) {
(void)sprintf(buf
, "%s redefined", name
);
(void)sprintf(buf
, "%s undefined", name
);
fatal("ran out of memory\n");
s
->s_type
= action
== INSERT
? VAR
: CONST
;