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#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include "shed.h"
static int shed_refresh(struct shed *e, struct buffer *next)
{
shed_move_end(e);
size_t s = e->cur->pos;
char clrbuf[s];
memset(clrbuf, '\b', s);
write(STDOUT_FILENO, clrbuf, s);
memset(clrbuf, ' ', s);
write(STDOUT_FILENO, clrbuf, s);
memset(clrbuf, '\b', s);
write(STDOUT_FILENO, clrbuf, s);
e->cur = next;
e->cur->pos = 0;
shed_move_end(e);
return 1;
}
int shed_history_forward(struct shed *e)
{
if (e->cur->next != NULL) {
return shed_refresh(e, e->cur->next);
}
return 1;
}
int shed_history_backward(struct shed *e)
{
if (e->cur->prev != NULL) {
return shed_refresh(e, e->cur->prev);
}
return 1;
}
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