100 lines
1.9 KiB
C
100 lines
1.9 KiB
C
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#include <out.h>
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#include <system.h>
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#include "hash.h"
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#include "header.h"
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#include "back.h"
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int string_lengte = 0,
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index_symbol_table = -1;
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struct Hashitem *Hashitems ;
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int Hashtab[ MAXHASH];
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int find_sym( sym, isdef)
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char *sym;
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int isdef;
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{
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register char *p;
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register struct outname *s;
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register struct Hashitem *ip;
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register int h;
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if ( index_symbol_table != -1 ) {
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s = symbol_table + index_symbol_table;
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if ( sym == s->on_foff + string_area) {
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if ( (s->on_valu == -2) && ( isdef == REFERENCE)) {
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s->on_type = S_EXT;
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s->on_valu = -1;
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}
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return( index_symbol_table);
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}
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}
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h = Hash(sym);
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for ( ip = Hashtab[h] + Hashitems ; ip != Hashitems;
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ip = (ip->hs_next) + Hashitems) {
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s = symbol_table + ip->hs_nami;
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if (strcmp(sym, (s->on_foff) + string_area) == 0) {
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if ( (s->on_valu == -2) && (isdef == REFERENCE)) {
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s->on_type = S_EXT;
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s->on_valu = -1;
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}
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return ip->hs_nami;
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}
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}
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if ( nname >= size_symbol)
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mem_symbol_hash();
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s = symbol_table + nname;
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ip = Hashitems + nname + 1; /* skip the first entry */
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if (isdef == REFERENCE) {
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s->on_type = S_EXT;
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s->on_valu = -1;
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}
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if (isdef == STORE_STRING) {
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s->on_type = S_UND;
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s->on_valu = -2;
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}
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ip->hs_nami = nname;
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ip->hs_next = Hashtab[h];
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Hashtab[h] = ip - Hashitems;
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if ( sym == string)
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string += string_lengte;
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else { /* zie C_fil, C_lin, C_lni */
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string_lengte = 0;
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for( p=sym; *p != '\0' ; p++) {
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if ( (string - string_area) >= size_string)
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mem_string();
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*string++ = *p;
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string_lengte++;
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}
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}
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if ( (string - string_area) >= size_string)
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mem_string();
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*string++ = '\0';
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s->on_foff = string - (string_lengte + 1) - string_area;
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return nname++;
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}
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int Hash(sym)
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char *sym;
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{
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register unsigned h;
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register c;
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h = 0;
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while (c = *sym++) {
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h <<= 2;
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h += c;
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}
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return (h % MAXHASH);
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}
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