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Installing Variables in Symbol Table


/* install variables in symbol table */
void instvars(TOKEN idlist, TOKEN typetok)
  {  SYMBOL sym, typesym; int align;
     typesym = typetok->symtype;
     align = alignsize(typesym);
     while ( idlist != NULL )   /* for each id */
       {  sym = insertsym(idlist->stringval);
          sym->kind = VARSYM;
          sym->offset =
              wordaddress(blockoffs[blocknumber],
                          align);
          sym->size = typesym->size;
          blockoffs[blocknumber] =
                         sym->offset + sym->size;
          sym->datatype = typesym;
          sym->basicdt = typesym->basicdt;
          idlist = idlist->link;
        };
  }

blockoffs[blocknumber] is the offset in the current block; this is the next value for this storage allocation.