/*
* Remember input @inp for a while.
*/
void
save_input(char inp)
{
int eol;
while (ring_putc(&recent_input, inp) < 0) {
eol = ring_search(&recent_input, "\n", 0);
assert(eol >= 0);
ring_discard(&recent_input, eol + 1);
}
}
/*
* Forget remembered input up to SEEN.
* SEEN should be obtained from save_input() or seen_input().
*/
void
forget_input(size_t seen)
{
size_t forgotten = saved_bytes - ring_len(&recent_input);
assert(seen);
if (seen > forgotten) {
assert(ring_peek(&recent_input, seen - forgotten - 1) == '\n');
ring_discard(&recent_input, seen - forgotten);
}
}
/*
* Remember line of input INP for a while.
* It must end with a newline.
* Return value is suitable for forget_input(): it makes it forget all
* input up to and including this line.
*/
size_t
save_input(char *inp)
{
size_t len = strlen(inp);
int eol;
assert(len && inp[len - 1] == '\n');
while (ring_putm(&recent_input, inp, len) < 0) {
eol = ring_search(&recent_input, "\n");
assert(eol >= 0);
ring_discard(&recent_input, eol + 1);
}
saved_bytes += len;
return saved_bytes;
}
