mirror of
https://github.com/rkd77/elinks.git
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132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/* Downloads progression stuff. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "elinks.h"
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#include "network/progress.h"
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#include "util/error.h"
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#include "util/memory.h"
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#include "util/time.h"
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#define SPD_DISP_TIME ((milliseconds_T) 100)
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#define CURRENT_SPD_AFTER ((milliseconds_T) 100)
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int
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has_progress(struct progress *progress)
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{
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timeval_T current_speed_after;
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timeval_from_milliseconds(¤t_speed_after, CURRENT_SPD_AFTER);
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return (timeval_cmp(&progress->elapsed, ¤t_speed_after) >= 0);
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}
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struct progress *
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init_progress(off_t start)
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{
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struct progress *progress = (struct progress *)mem_calloc(1, sizeof(*progress));
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if (progress) {
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progress->start = start;
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progress->timer = TIMER_ID_UNDEF;
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}
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return progress;
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}
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void
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done_progress(struct progress *progress)
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{
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assert(progress->timer == TIMER_ID_UNDEF);
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mem_free(progress);
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}
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/** Timer callback for progress.timer. As explained in install_timer(),
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* this function must erase the expired timer ID from all variables. */
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static void
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progress_timeout(void *progress_voidptr)
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{
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struct progress *const progress = (struct progress *const)progress_voidptr;
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progress->timer = TIMER_ID_UNDEF;
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/* The expired timer ID has now been erased. */
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progress->timer_func(progress->timer_func_data);
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}
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/* Usually called from the timer callback of @progress->timer. */
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void
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update_progress(struct progress *progress, off_t loaded, off_t size, off_t pos)
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{
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off_t bytes_delta;
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timeval_T now, elapsed, dis_b_max, dis_b_interval;
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timeval_now(&now);
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timeval_sub(&elapsed, &progress->last_time, &now);
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timeval_copy(&progress->last_time, &now);
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progress->loaded = loaded;
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bytes_delta = progress->loaded - progress->last_loaded;
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progress->last_loaded = progress->loaded;
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timeval_add_interval(&progress->elapsed, &elapsed);
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timeval_add_interval(&progress->dis_b, &elapsed);
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timeval_from_milliseconds(&dis_b_max, mult_ms(SPD_DISP_TIME, CURRENT_SPD_SEC));
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timeval_from_milliseconds(&dis_b_interval, SPD_DISP_TIME);
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while (timeval_cmp(&progress->dis_b, &dis_b_max) >= 0) {
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progress->cur_loaded -= progress->data_in_secs[0];
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memmove(progress->data_in_secs, progress->data_in_secs + 1,
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sizeof(*progress->data_in_secs) * (CURRENT_SPD_SEC - 1));
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progress->data_in_secs[CURRENT_SPD_SEC - 1] = 0;
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timeval_sub_interval(&progress->dis_b, &dis_b_interval);
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}
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progress->data_in_secs[CURRENT_SPD_SEC - 1] += bytes_delta;
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progress->cur_loaded += bytes_delta;
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progress->current_speed = progress->cur_loaded / (CURRENT_SPD_SEC * ((long) SPD_DISP_TIME) / 1000);
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progress->pos = pos;
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progress->size = size;
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if (progress->size != -1 && progress->size < progress->pos)
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progress->size = progress->pos;
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progress->average_speed = timeval_div_off_t(progress->loaded, &progress->elapsed);
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if (progress->average_speed) /* Division by zero risk */
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timeval_from_seconds(&progress->estimated_time,
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(progress->size - progress->pos) / progress->average_speed);
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install_timer(&progress->timer, SPD_DISP_TIME,
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progress_timeout, progress);
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}
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/*! Unlike in install_timer(), @a timer_func need not erase the
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* expired timer ID from @a progress->timer. update_progress()
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* installs the timer with a wrapper function that takes care of
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* erasing the timer ID. */
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void
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start_update_progress(struct progress *progress, void (*timer_func)(void *),
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void *timer_func_data)
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{
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if (!progress->valid) {
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struct progress tmp;
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/* Just copy useful fields from invalid progress. */
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memset(&tmp, 0, sizeof(tmp));
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tmp.start = progress->start;
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tmp.seek = progress->seek;
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tmp.valid = 1;
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memcpy(progress, &tmp, sizeof(*progress));
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}
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timeval_now(&progress->last_time);
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progress->last_loaded = progress->loaded;
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progress->timer_func = timer_func;
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progress->timer_func_data = timer_func_data;
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}
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