85 lines
1.7 KiB
C
85 lines
1.7 KiB
C
#ifndef NORCSID
|
|
static char rcsid[] = "$Header$";
|
|
#endif
|
|
|
|
#include "param.h"
|
|
#include "types.h"
|
|
#include "shc.h"
|
|
#include "lookup.h"
|
|
#include "alloc.h"
|
|
#include "proinf.h"
|
|
|
|
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*
|
|
* Author: Hans van Staveren
|
|
*/
|
|
|
|
unsigned hash(string) char *string; {
|
|
register char *p;
|
|
register unsigned i,sum;
|
|
|
|
for (sum=i=0,p=string;*p;i += 3)
|
|
sum ^= (*p++)<<(i&07);
|
|
return(sum);
|
|
}
|
|
|
|
sym_p symlookup(name,status,flags) char *name; int status,flags; {
|
|
register sym_p *spp,sp;
|
|
register i;
|
|
static short genfrag = 32767;
|
|
|
|
spp = &symhash[hash(name)%NSYMHASH];
|
|
while (*spp != (sym_p) 0)
|
|
if (strncmp((*spp)->s_name,name,IDL)==0) {
|
|
sp = *spp;
|
|
if ((sp->s_flags^flags)&SYMPRO)
|
|
error("%s is both proc and datalabel",name);
|
|
if (status == DEFINING) {
|
|
if (sp->s_flags&SYMDEF)
|
|
error("redefined symbol %s",name);
|
|
sp->s_flags |= SYMDEF;
|
|
}
|
|
return(sp);
|
|
} else
|
|
spp = &(*spp)->s_next;
|
|
|
|
/*
|
|
* symbol not found, enter in table
|
|
*/
|
|
|
|
i = strlen(name) + 1;
|
|
if (i & 1)
|
|
i++;
|
|
if (i > IDL)
|
|
i = IDL;
|
|
*spp = sp = newsym(i);
|
|
strncpy(sp->s_name,name,i);
|
|
sp->s_flags = flags;
|
|
if (status == DEFINING)
|
|
sp->s_flags |= SYMDEF;
|
|
sp->s_frag = genfrag--;
|
|
return(sp);
|
|
}
|
|
|
|
num_p numlookup(number) unsigned number; {
|
|
register num_p *npp, np;
|
|
|
|
npp = &curpro.numhash[number%NNUMHASH];
|
|
while (*npp != (num_p) 0)
|
|
if ((*npp)->n_number == number)
|
|
return(*npp);
|
|
else
|
|
npp = &(*npp)->n_next;
|
|
|
|
/*
|
|
* local label not found, enter in tabel
|
|
*/
|
|
|
|
*npp = np = newnum();
|
|
np->n_number = number;
|
|
np->n_repl = np;
|
|
return(np);
|
|
}
|