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#include <time.h>
#include <stdlib.h>
#include "screen.h"
void draw_lines(struct display_status *status);
void update_lines(struct display_status *status);
char * get_line(struct display_status *status, size_t rline);
void display_update_scroll(struct display_status *status)
{
time_t crr_time = time(NULL);
if (status->last_scroll_time - crr_time > status->delta) {
status->last_scroll_time += status->delta;
status->line_cursor++;
update_lines(status);
}
draw_lines(status);
}
void draw_lines(struct display_status *status)
{
}
void update_lines(struct display_status *status)
{
status->first_line = get_line(status, status->line_cursor);
status->second_line = get_line(status, status->line_cursor + 1);
}
/**
* Returns a pointer to the first charachter of requested line. If line does not
* exist --- a null is returned.
*/
char * get_line(struct display_status *status, size_t rline)
{
size_t i;
size_t line_idx = 0;
for (i = 0; i < status->message_len; i++) {
if (rline == line_idx) {
return status->message + i;
}
if (status->message[i] == '\0') {
line_idx++;
}
}
/* The fact that we are here means that end of the message was reached.
* In that case --- return null;
*/
return NULL;
}
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