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elinks/src/network/progress.c
Witold Filipczyk 7d3cff0655 [network] cast
2022-01-25 18:47:28 +01:00

132 lines
3.7 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 = (struct 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);
}
/** Timer callback for progress.timer. As explained in install_timer(),
* this function must erase the expired timer ID from all variables. */
static void
progress_timeout(void *progress_voidptr)
{
struct progress *const progress = (struct progress *const)progress_voidptr;
progress->timer = TIMER_ID_UNDEF;
/* The expired timer ID has now been erased. */
progress->timer_func(progress->timer_func_data);
}
/* Usually called from the timer callback of @progress->timer. */
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_timeout, progress);
}
/*! Unlike in install_timer(), @a timer_func need not erase the
* expired timer ID from @a progress->timer. update_progress()
* installs the timer with a wrapper function that takes care of
* erasing the timer ID. */
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;
}