fetch
fetch instr from pc
execve_fetch_element_t fetch)
envp, fetch, &spawn_data->sed_exec);
fetch(ixold, a, b, f1, '<', 1, *pflags);
fetch(ixnew, c, d, f2, '>', 0, *pflags);
nc = fetch(ixold, a, b, f1, '\0', 1, *pflags);
fetch(ixnew, c, d, f2, '\0', 0, *pflags);
fetch(ixold, a, b, f1, '<', 1, *pflags);
fetch(ixnew, c, d, f2, diff_format == D_NORMAL ? '>' : '\0', 0, *pflags);
fetch(ixold, lowa, b, f1, ' ', 0, flags);
fetch(ixold, lowa, a - 1, f1, ' ', 0, flags);
fetch(ixold, a, b, f1,
fetch(ixold, b + 1, upb, f1, ' ', 0, flags);
fetch(ixnew, lowc, d, f2, ' ', 0, flags);
fetch(ixnew, lowc, c - 1, f2, ' ', 0, flags);
fetch(ixnew, c, d, f2,
fetch(ixnew, d + 1, upd, f2, ' ', 0, flags);
fetch(ixold, lowa, a - 1, f1, ' ', 0, flags);
fetch(ixold, a, b, f1, '-', 0, flags);
fetch(ixnew, c, d, f2, '+', 0, flags);
fetch(ixold, lowa, a - 1, f1, ' ', 0, flags);
fetch(ixold, a, b, f1, '-', 0, flags);
fetch(ixnew, lowc, c - 1, f2, ' ', 0, flags);
fetch(ixnew, c, d, f2, '+', 0, flags);
fetch(ixnew, d + 1, upd, f2, ' ', 0, flags);
static int fetch(long *, int, int, FILE *, int, int, int);
nc = fetch(ixold, i0, i0, f1, '\0', 1, flags);
fetch(ixnew, J[i0], J[i0], f2, '\0', 0, flags);