We don't need absolute floating point precision at all here; we can stick to integer land and use milliseconds which are precise enough for our purposes. This also removes most floating point math out of the non-update code path.
Signed-off-by: Dan McGee <[email protected]> --- src/pacman/callback.c | 51 ++++++++++++++++++++++++++---------------------- src/pacman/util.h | 3 -- 2 files changed, 28 insertions(+), 26 deletions(-) diff --git a/src/pacman/callback.c b/src/pacman/callback.c index 87ba30a..0dcdb69 100644 --- a/src/pacman/callback.c +++ b/src/pacman/callback.c @@ -43,15 +43,19 @@ static off_t list_total = 0.0; static int on_progress = 0; static alpm_list_t *output = NULL; -/* Silly little helper function, determines if the caller needs a visual update +/* update speed for the fill_progress based functions */ +#define UPDATE_SPEED_MS 200 + +/** + * Silly little helper function, determines if the caller needs a visual update * since the last time this function was called. - * This is made for the two progress bar functions, to prevent flicker - * - * first_call indicates if this is the first time it is called, for - * initialization purposes */ -static double get_update_timediff(int first_call) + * This is made for the two progress bar functions, to prevent flicker. + * @param first_call 1 on first call for initialization purposes, 0 otherwise + * @return number of milliseconds since last call + */ +static long get_update_timediff(int first_call) { - double retval = 0.0; + long retval = 0; static struct timeval last_time = {0, 0}; /* on first call, simply set the last time and return */ @@ -59,18 +63,17 @@ static double get_update_timediff(int first_call) gettimeofday(&last_time, NULL); } else { struct timeval this_time; - double diff_sec, diff_usec; + time_t diff_sec; + suseconds_t diff_usec; gettimeofday(&this_time, NULL); diff_sec = this_time.tv_sec - last_time.tv_sec; diff_usec = this_time.tv_usec - last_time.tv_usec; - retval = diff_sec + (diff_usec / 1000000.0); + retval = (diff_sec * 1000) + (diff_usec / 1000); - /* return 0 and do not update last_time if interval was too short */ - if(retval < UPDATE_SPEED_SEC) { - retval = 0.0; - } else { + /* do not update last_time if interval was too short */ + if(retval >= UPDATE_SPEED_MS) { last_time = this_time; } } @@ -399,7 +402,7 @@ void cb_progress(alpm_progress_t event, const char *pkgname, int percent, if(current != prevcurrent) { /* update always */ } else if(!pkgname || percent == prevpercent || - get_update_timediff(0) < UPDATE_SPEED_SEC) { + get_update_timediff(0) < UPDATE_SPEED_MS) { /* only update the progress bar when we have a package name, the * percentage has changed, and it has been long enough. */ return; @@ -534,7 +537,8 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total) int totaldownload = 0; off_t xfered, total; - double rate = 0.0, timediff = 0.0; + double rate = 0.0; + long timediff = 0; unsigned int eta_h = 0, eta_m = 0, eta_s = 0; double rate_human, xfered_human; const char *rate_label, *xfered_label; @@ -593,16 +597,17 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total) } else if(file_xfered == file_total) { /* compute final values */ struct timeval current_time; - double diff_sec, diff_usec; + time_t diff_sec; + suseconds_t diff_usec; gettimeofday(¤t_time, NULL); diff_sec = current_time.tv_sec - initial_time.tv_sec; diff_usec = current_time.tv_usec - initial_time.tv_usec; - timediff = diff_sec + (diff_usec / 1000000.0); - if(timediff > 0.0) { - rate = xfered / timediff; - /* round elapsed time to the nearest second */ - eta_s = (unsigned int)(timediff + 0.5); + timediff = (diff_sec * 1000) + (diff_usec / 1000); + if(timediff > 0) { + rate = (double)xfered / (timediff / 1000.0); + /* round elapsed time (in ms) to the nearest second */ + eta_s = (unsigned int)(timediff + 500) / 1000; } else { eta_s = 0; } @@ -610,11 +615,11 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total) /* compute current average values */ timediff = get_update_timediff(0); - if(timediff < UPDATE_SPEED_SEC) { + if(timediff < UPDATE_SPEED_MS) { /* return if the calling interval was too short */ return; } - rate = (xfered - xfered_last) / timediff; + rate = (double)(xfered - xfered_last) / (timediff / 1000.0); /* average rate to reduce jumpiness */ rate = (rate + 2 * rate_last) / 3; if(rate > 0.0) { diff --git a/src/pacman/util.h b/src/pacman/util.h index 6291939..5d3ea2f 100644 --- a/src/pacman/util.h +++ b/src/pacman/util.h @@ -36,9 +36,6 @@ #define _n(str1, str2, ct) (ct == 1 ? str1 : str2) #endif -/* update speed for the fill_progress based functions */ -#define UPDATE_SPEED_SEC 0.2f - typedef struct _pm_target_t { alpm_pkg_t *remove; alpm_pkg_t *install; -- 1.7.8.1
