1
0
mirror of https://github.com/rkd77/elinks.git synced 2024-11-04 08:17:17 -05:00
elinks/src/network/progress.c
2006-12-02 18:35:03 +02:00

119 lines
3.4 KiB
C

/* Downloads progression stuff. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "elinks.h"
#include "network/progress.h"
#include "util/error.h"
#include "util/memory.h"
#include "util/time.h"
#define SPD_DISP_TIME ((milliseconds_T) 100)
#define CURRENT_SPD_AFTER ((milliseconds_T) 100)
int
has_progress(struct progress *progress)
{
timeval_T current_speed_after;
timeval_from_milliseconds(&current_speed_after, CURRENT_SPD_AFTER);
return (timeval_cmp(&progress->elapsed, &current_speed_after) >= 0);
}
struct progress *
init_progress(off_t start)
{
struct progress *progress = mem_calloc(1, sizeof(*progress));
if (progress) {
progress->start = start;
progress->timer = TIMER_ID_UNDEF;
}
return progress;
}
void
done_progress(struct progress *progress)
{
assert(progress->timer == TIMER_ID_UNDEF);
mem_free(progress);
}
/* Called from the timer callback of @progress->timer. This function
* erases the expired timer ID on behalf of the actual callback. */
void
update_progress(struct progress *progress, off_t loaded, off_t size, off_t pos)
{
off_t bytes_delta;
timeval_T now, elapsed, dis_b_max, dis_b_interval;
timeval_now(&now);
timeval_sub(&elapsed, &progress->last_time, &now);
timeval_copy(&progress->last_time, &now);
progress->loaded = loaded;
bytes_delta = progress->loaded - progress->last_loaded;
progress->last_loaded = progress->loaded;
timeval_add_interval(&progress->elapsed, &elapsed);
timeval_add_interval(&progress->dis_b, &elapsed);
timeval_from_milliseconds(&dis_b_max, mult_ms(SPD_DISP_TIME, CURRENT_SPD_SEC));
timeval_from_milliseconds(&dis_b_interval, SPD_DISP_TIME);
while (timeval_cmp(&progress->dis_b, &dis_b_max) >= 0) {
progress->cur_loaded -= progress->data_in_secs[0];
memmove(progress->data_in_secs, progress->data_in_secs + 1,
sizeof(*progress->data_in_secs) * (CURRENT_SPD_SEC - 1));
progress->data_in_secs[CURRENT_SPD_SEC - 1] = 0;
timeval_sub_interval(&progress->dis_b, &dis_b_interval);
}
progress->data_in_secs[CURRENT_SPD_SEC - 1] += bytes_delta;
progress->cur_loaded += bytes_delta;
progress->current_speed = progress->cur_loaded / (CURRENT_SPD_SEC * ((long) SPD_DISP_TIME) / 1000);
progress->pos = pos;
progress->size = size;
if (progress->size != -1 && progress->size < progress->pos)
progress->size = progress->pos;
progress->average_speed = timeval_div_off_t(progress->loaded, &progress->elapsed);
if (progress->average_speed) /* Division by zero risk */
timeval_from_seconds(&progress->estimated_time,
(progress->size - progress->pos) / progress->average_speed);
install_timer(&progress->timer, SPD_DISP_TIME, progress->timer_func, progress->timer_func_data);
/* The expired timer ID has now been erased. */
}
/* As in @install_timer, @timer_func should erase the expired timer ID
* from @progress->timer. The usual way to ensure this is to make
* @timer_func call @update_progress, which sets a new timer. */
void
start_update_progress(struct progress *progress, void (*timer_func)(void *),
void *timer_func_data)
{
if (!progress->valid) {
struct progress tmp;
/* Just copy useful fields from invalid progress. */
memset(&tmp, 0, sizeof(tmp));
tmp.start = progress->start;
tmp.seek = progress->seek;
tmp.valid = 1;
memcpy(progress, &tmp, sizeof(*progress));
}
timeval_now(&progress->last_time);
progress->last_loaded = progress->loaded;
progress->timer_func = timer_func;
progress->timer_func_data = timer_func_data;
}