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Go Back   Linux Archive > ArchLinux > ArchLinux Pacman Development

 
 
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Old 02-28-2011, 03:38 PM
Jakob Gruber
 
Default Add a utility function to humanize sizes

Converts the given size in bytes in two possible ways:
1) target_unit is specified (!= 0): size is converted to target unit.
2) target_unit is not specified (== 0): size is converted to the first
unit which will bring size to below 2048.

If specified, label will point to the long label ('MB') if long_labels is
set or the short label ('M') if it is not.

Additionally, ShowSize is no longer locked to MB but will scale units as
required.

Signed-off-by: Jakob Gruber <jakob.gruber@gmail.com>
---
src/pacman/callback.c | 45 ++++++++-------------------------
src/pacman/package.c | 18 +++++++------
src/pacman/query.c | 7 ++---
src/pacman/sync.c | 7 ++---
src/pacman/util.c | 65 ++++++++++++++++++++++++++++++++++++++----------
src/pacman/util.h | 1 +
6 files changed, 79 insertions(+), 64 deletions(-)

diff --git a/src/pacman/callback.c b/src/pacman/callback.c
index a80172b..769031a 100644
--- a/src/pacman/callback.c
+++ b/src/pacman/callback.c
@@ -491,10 +491,11 @@ 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, f_xfered = 0.0;
+ double rate = 0.0, timediff = 0.0;
unsigned int eta_h = 0, eta_m = 0, eta_s = 0;
+ double rate_human, xfered_human;
+ const char *rate_label, *xfered_label;
int file_percent = 0, total_percent = 0;
- char rate_size = 'K', xfered_size = 'K';

if(config->noprogressbar || file_total == -1) {
if(file_xfered == 0) {
@@ -556,7 +557,7 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)
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);
- rate = xfered / (timediff * 1024.0);
+ rate = xfered / timediff;

/* round elapsed time to the nearest second */
eta_s = (int)(timediff + 0.5);
@@ -568,10 +569,10 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)
/* return if the calling interval was too short */
return;
}
- rate = (xfered - xfered_last) / (timediff * 1024.0);
+ rate = (xfered - xfered_last) / timediff;
/* average rate to reduce jumpiness */
rate = (rate + 2 * rate_last) / 3;
- eta_s = (total - xfered) / (rate * 1024.0);
+ eta_s = (total - xfered) / rate;
rate_last = rate;
xfered_last = xfered;
}
@@ -625,37 +626,13 @@ void cb_dl_progress(const char *filename, off_t file_xfered, off_t file_total)

}

- /* Awesome formatting for progress bar. We need a mess of Kb->Mb->Gb stuff
- * here. We'll use limit of 2048 for each until we get some empirical */
- /* rate_size = 'K'; was set above */
- if(rate > 2048.0) {
- rate /= 1024.0;
- rate_size = 'M';
- if(rate > 2048.0) {
- rate /= 1024.0;
- rate_size = 'G';
- /* we should not go higher than this for a few years (9999.9 Gb/s?)*/
- }
- }
-
- f_xfered = xfered / 1024.0; /* convert to K by default */
- /* xfered_size = 'K'; was set above */
- if(f_xfered > 2048.0) {
- f_xfered /= 1024.0;
- xfered_size = 'M';
- if(f_xfered > 2048.0) {
- f_xfered /= 1024.0;
- xfered_size = 'G';
- /* I should seriously hope that archlinux packages never break
- * the 9999.9GB mark... we'd have more serious problems than the progress
- * bar in pacman */
- }
- }
+ rate_human = humanize_size((off_t)rate, 0, 0, &rate_label);
+ xfered_human = humanize_size(xfered, 0, 0, &xfered_label);

/* 1 space + filenamelen + 1 space + 7 for size + 1 + 7 for rate + 2 for /s + 1 space + 8 for eta */
- printf(" %ls%-*s %6.1f%c %#6.1f%c/s %02u:%02u:%02u", wcfname,
- padwid, "", f_xfered, xfered_size,
- rate, rate_size, eta_h, eta_m, eta_s);
+ printf(" %ls%-*s %6.1f%s %#6.1f%s/s %02u:%02u:%02u", wcfname,
+ padwid, "", xfered_human, xfered_label, rate_human, rate_label,
+ eta_h, eta_m, eta_s);

free(fname);
free(wcfname);
diff --git a/src/pacman/package.c b/src/pacman/package.c
index 77a5ee7..39e36f6 100644
--- a/src/pacman/package.c
+++ b/src/pacman/package.c
@@ -51,6 +51,8 @@ void dump_pkg_full(pmpkg_t *pkg, int level)
const char *reason;
time_t bdate, idate;
char bdatestr[50] = "", idatestr[50] = "";
+ const char *label;
+ double size;
const alpm_list_t *i;
alpm_list_t *requiredby = NULL, *depstrings = NULL;

@@ -105,17 +107,17 @@ void dump_pkg_full(pmpkg_t *pkg, int level)
}
list_display(_("Conflicts With :"), alpm_pkg_get_conflicts(pkg));
list_display(_("Replaces :"), alpm_pkg_get_replaces(pkg));
+
+ size = humanize_size(alpm_pkg_get_size(pkg), 'K', 1, &label);
if(level < 0) {
- printf(_("Download Size : %6.2f K
"),
- (double)alpm_pkg_get_size(pkg) / 1024.0);
- }
- if(level == 0) {
- printf(_("Compressed Size: %6.2f K
"),
- (double)alpm_pkg_get_size(pkg) / 1024.0);
+ printf(_("Download Size : %6.2f %s
"), size, label);
+ } else if(level == 0) {
+ printf(_("Compressed Size: %6.2f %s
"), size, label);
}

- printf(_("Installed Size : %6.2f K
"),
- (double)alpm_pkg_get_isize(pkg) / 1024.0);
+ size = humanize_size(alpm_pkg_get_isize(pkg), 'K', 1, &label);
+ printf(_("Installed Size : %6.2f %s
"), size, label);
+
string_display(_("Packager :"), alpm_pkg_get_packager(pkg));
string_display(_("Architecture :"), alpm_pkg_get_arch(pkg));
string_display(_("Build Date :"), bdatestr);
diff --git a/src/pacman/query.c b/src/pacman/query.c
index 18c6992..d3a90ff 100644
--- a/src/pacman/query.c
+++ b/src/pacman/query.c
@@ -247,10 +247,9 @@ static int query_search(alpm_list_t *targets)

/* print the package size with the output if ShowSize option set */
if(!config->quiet && config->showsize) {
- /* Convert byte size to MB */
- double mbsize = (double)alpm_pkg_get_size(pkg) / (1024.0 * 1024.0);
-
- printf(" [%.2f MB]", mbsize);
+ const char *label;
+ double size = humanize_size(alpm_pkg_get_size(pkg), 0, 1, &label);
+ printf(" [%.2f %s]", size, label);
}


diff --git a/src/pacman/sync.c b/src/pacman/sync.c
index 26f6f82..aadb9e5 100644
--- a/src/pacman/sync.c
+++ b/src/pacman/sync.c
@@ -349,10 +349,9 @@ static int sync_search(alpm_list_t *syncs, alpm_list_t *targets)

/* print the package size with the output if ShowSize option set */
if(!config->quiet && config->showsize) {
- /* Convert byte size to MB */
- double mbsize = (double)alpm_pkg_get_size(pkg) / (1024.0 * 1024.0);
-
- printf(" [%.2f MB]", mbsize);
+ const char *label;
+ double size = humanize_size(alpm_pkg_get_size(pkg), 0, 1, &label);
+ printf(" [%.2f %s]", size, label);
}

if (!config->quiet) {
diff --git a/src/pacman/util.c b/src/pacman/util.c
index c08ebb1..ba93963 100644
--- a/src/pacman/util.c
+++ b/src/pacman/util.c
@@ -502,9 +502,10 @@ void list_display_linebreak(const char *title, const alpm_list_t *list)
void display_targets(const alpm_list_t *pkgs, int install)
{
char *str;
+ const char *label;
+ double size;
const alpm_list_t *i;
off_t isize = 0, dlsize = 0;
- double mbisize = 0.0, mbdlsize = 0.0;
alpm_list_t *targets = NULL;

if(!pkgs) {
@@ -522,10 +523,9 @@ void display_targets(const alpm_list_t *pkgs, int install)

/* print the package size with the output if ShowSize option set */
if(config->showsize) {
- double mbsize = (double)alpm_pkg_get_size(pkg) / (1024.0 * 1024.0);
-
- pm_asprintf(&str, "%s-%s [%.2f MB]", alpm_pkg_get_name(pkg),
- alpm_pkg_get_version(pkg), mbsize);
+ size = humanize_size(alpm_pkg_get_size(pkg), 0, 1, &label);
+ pm_asprintf(&str, "%s-%s [%.2f %s]", alpm_pkg_get_name(pkg),
+ alpm_pkg_get_version(pkg), size, label);
} else {
pm_asprintf(&str, "%s-%s", alpm_pkg_get_name(pkg),
alpm_pkg_get_version(pkg));
@@ -533,19 +533,17 @@ void display_targets(const alpm_list_t *pkgs, int install)
targets = alpm_list_add(targets, str);
}

- /* Convert byte sizes to MB */
- mbdlsize = (double)dlsize / (1024.0 * 1024.0);
- mbisize = (double)isize / (1024.0 * 1024.0);
-
if(install) {
pm_asprintf(&str, _("Targets (%d):"), alpm_list_count(targets));
list_display(str, targets);
free(str);
printf("
");

- printf(_("Total Download Size: %.2f MB
"), mbdlsize);
+ size = humanize_size(dlsize, 'M', 1, &label);
+ printf(_("Total Download Size: %.2f %s
"), size, label);
if(!(config->flags & PM_TRANS_FLAG_DOWNLOADONLY)) {
- printf(_("Total Installed Size: %.2f MB
"), mbisize);
+ size = humanize_size(isize, 'M', 1, &label);
+ printf(_("Total Installed Size: %.2f %s
"), size, label);
}
} else {
pm_asprintf(&str, _("Remove (%d):"), alpm_list_count(targets));
@@ -553,7 +551,8 @@ void display_targets(const alpm_list_t *pkgs, int install)
free(str);
printf("
");

- printf(_("Total Removed Size: %.2f MB
"), mbisize);
+ size = humanize_size(isize, 'M', 1, &label);
+ printf(_("Total Removed Size: %.2f %s
"), size, label);
}

FREELIST(targets);
@@ -594,6 +593,45 @@ static char *pkg_get_location(pmpkg_t *pkg)
}
}

+/** Converts sizes in bytes into human readable units.
+ *
+ * @param bytes the size in bytes
+ * @param target_unit if equal to one of the short unit labels ('B', 'K', ...)
+ * bytes is converted to target_unit; if equal to 0, the first
+ * unit which will bring the value to below a threshold of 2048
+ * will be chosen.
+ * @param long_labels whether to use short ("K") or long ("KB") unit labels
+ * @param label will be set to the appropriate unit label
+ *
+ * @return the size in the appropriate unit
+ */
+double humanize_size(off_t bytes, const char target_unit, int long_labels,
+ const char **label)
+{
+ static const char *shortlabels[] = {"B", "K", "M", "G", "T", "P"};
+ static const char *longlabels[] = {"B", "KB", "MB", "GB", "TB", "PB"};
+ static const int unitcount = sizeof(shortlabels) / sizeof(shortlabels[0]);
+
+ const char **labels = long_labels ? longlabels : shortlabels;
+ double val = (double)bytes;
+ int index;
+
+ for(index = 0; index < unitcount - 1; index++) {
+ if(target_unit != 0 && shortlabels[index][0] == target_unit) {
+ break;
+ } else if(target_unit == 0 && val <= 2048.0) {
+ break;
+ }
+ val /= 1024.0;
+ }
+
+ if(label) {
+ *label = labels[index];
+ }
+
+ return(val);
+}
+
void print_packages(const alpm_list_t *packages)
{
const alpm_list_t *i;
@@ -638,8 +676,7 @@ void print_packages(const alpm_list_t *packages)
/* %s : size */
if(strstr(temp,"%s")) {
char *size;
- double mbsize = (double)pkg_get_size(pkg) / (1024.0 * 1024.0);
- pm_asprintf(&size, "%.2f", mbsize);
+ pm_asprintf(&size, "%.2f", humanize_size(pkg_get_size(pkg), 'M', 0, NULL));
string = strreplace(temp, "%s", size);
free(size);
free(temp);
diff --git a/src/pacman/util.h b/src/pacman/util.h
index 234a631..6a20ba4 100644
--- a/src/pacman/util.h
+++ b/src/pacman/util.h
@@ -52,6 +52,7 @@ char *strtrim(char *str);
char *strreplace(const char *str, const char *needle, const char *replace);
alpm_list_t *strsplit(const char *str, const char splitchar);
void string_display(const char *title, const char *string);
+double humanize_size(off_t bytes, const char target_unit, int long_labels, const char **label);
void list_display(const char *title, const alpm_list_t *list);
void list_display_linebreak(const char *title, const alpm_list_t *list);
void display_targets(const alpm_list_t *pkgs, int install);
--
1.7.4.1
 

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