reservespace
if (reservespace(newpb, 0, pb->maxoff) == -1) {
return reservespace(pufbuf, pufbuf->offset, wantsize);
if (reservespace(pufbuf, offset, dlen) == -1)
if (reservespace(pufbuf, newoff, 0) == -1)
if (reservespace(pufbuf, winoff, winlen) == -1)
symtab = reservespace(symtab, &symtabsize,
strtab = reservespace(strtab, &strtabsize, strtaboff, curstrsize);