/* Reduces amount of memory taken by the history. The new_len specifies new
* size of the history, while removed_count parameter designates number of
* removed elements. */
static void
decrease_history(size_t new_len, size_t removed_count)
{
reduce_view_history(&lwin, new_len);
reduce_view_history(&rwin, new_len);
hist_trunc(&cfg.search_hist, new_len, removed_count);
hist_trunc(&cfg.cmd_hist, new_len, removed_count);
hist_trunc(&cfg.prompt_hist, new_len, removed_count);
hist_trunc(&cfg.filter_hist, new_len, removed_count);
}
void
hists_resize(int new_size)
{
const int old_size = curr_stats.history_size;
const int delta = new_size - old_size;
if(new_size <= 0)
{
hist_reset(&curr_stats.search_hist, old_size);
hist_reset(&curr_stats.cmd_hist, old_size);
hist_reset(&curr_stats.prompt_hist, old_size);
hist_reset(&curr_stats.filter_hist, old_size);
curr_stats.history_size = 0;
return;
}
curr_stats.history_size = new_size;
if(delta < 0)
{
hist_trunc(&curr_stats.search_hist, new_size, -delta);
hist_trunc(&curr_stats.cmd_hist, new_size, -delta);
hist_trunc(&curr_stats.prompt_hist, new_size, -delta);
hist_trunc(&curr_stats.filter_hist, new_size, -delta);
}
curr_stats.cmd_hist.items = reallocarray(curr_stats.cmd_hist.items, new_size,
sizeof(char *));
curr_stats.search_hist.items = reallocarray(curr_stats.search_hist.items,
new_size, sizeof(char *));
curr_stats.prompt_hist.items = reallocarray(curr_stats.prompt_hist.items,
new_size, sizeof(char *));
curr_stats.filter_hist.items = reallocarray(curr_stats.filter_hist.items,
new_size, sizeof(char *));
if(delta > 0)
{
const size_t str_item_len = sizeof(char *)*delta;
memset(curr_stats.cmd_hist.items + old_size, 0, str_item_len);
memset(curr_stats.search_hist.items + old_size, 0, str_item_len);
memset(curr_stats.prompt_hist.items + old_size, 0, str_item_len);
memset(curr_stats.filter_hist.items + old_size, 0, str_item_len);
}
}