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Implement fmt_human_2() and fmt_human_10()

Browse source 
These functions take the raw number and a unit and automatically
print it out "scaled down" to a proper SI-prefix, for powers of 2
and 10 respectively.

Apply them to the 2-power cases and keep the 10-power for a later
commit.
This commit is contained in:
Laslo Hunhold 2018-05-19 22:52:17 +02:00 committed by Aaron Marcher
parent 74c4f4ebda
commit 46c4540dd2
6 changed files with 61 additions and 32 deletions
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6
components/disk.c
View file

@ -16,7 +16,7 @@ disk_free(const char *mnt)
return NULL;
}
return fmt_scaled(fs.f_frsize * fs.f_bavail);
return fmt_human_2(fs.f_frsize * fs.f_bavail, "B");
}
const char *
@ -43,7 +43,7 @@ disk_total(const char *mnt)
return NULL;
}
return fmt_scaled(fs.f_frsize * fs.f_blocks);
return fmt_human_2(fs.f_frsize * fs.f_blocks, "B");
}
const char *
@ -56,5 +56,5 @@ disk_used(const char *mnt)
return NULL;
}
return fmt_scaled(fs.f_frsize * (fs.f_blocks - fs.f_bfree));
return fmt_human_2(fs.f_frsize * (fs.f_blocks - fs.f_bfree), "B");
}

28
components/netspeeds.c
View file

@ -25,9 +25,12 @@
if (pscanf(path, "%llu", &rxbytes) != 1) {
return NULL;
}
if (oldrxbytes == 0) {
return NULL;
}
return oldrxbytes ? fmt_scaled((rxbytes - oldrxbytes) *
1000 / interval) : NULL;
return fmt_human_2((rxbytes - oldrxbytes) *
1000 / interval, "B/s");
}
const char *
@ -48,9 +51,12 @@
if (pscanf(path, "%llu", &txbytes) != 1) {
return NULL;
}
if (oldtxbytes == 0) {
return NULL;
}
return oldtxbytes ? fmt_scaled((txbytes - oldtxbytes) *
1000 / interval) : NULL;
return fmt_human_2((txbytes - oldtxbytes) *
1000 / interval, "B/s");
}
#elif defined(__OpenBSD__)
#include <string.h>
@ -87,9 +93,12 @@
warn("reading 'if_data' failed");
return NULL;
}
if (oldrxbytes == 0) {
return NULL;
}
return oldrxbytes ? fmt_scaled((rxbytes - oldrxbytes) *
1000 / interval) : NULL;
return fmt_human_2((rxbytes - oldrxbytes) *
1000 / interval, "B/s");
}
const char *
@ -120,8 +129,11 @@
warn("reading 'if_data' failed");
return NULL;
}
if (oldtxbytes == 0) {
return NULL;
}
return oldtxbytes ? fmt_scaled((txbytes - oldtxbytes) *
1000 / interval) : NULL;
return fmt_human_2((txbytes - oldtxbytes) *
1000 / interval, "B/s");
}
#endif

12
components/ram.c
View file

@ -14,7 +14,7 @@
"MemFree: %ld kB\n"
"MemAvailable: %ld kB\n",
&free, &free, &free) == 3) ?
fmt_scaled(free * 1024) : NULL;
fmt_human_2(free * 1024, "B") : NULL;
}
const char *
@ -39,7 +39,7 @@
long total;
return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
fmt_scaled(total * 1024) : NULL;
fmt_human_2(total * 1024, "B") : NULL;
}
const char *
@ -53,7 +53,7 @@
"MemAvailable: %ld kB\nBuffers: %ld kB\n"
"Cached: %ld kB\n",
&total, &free, &buffers, &buffers, &cached) == 5) ?
fmt_scaled((total - free - buffers - cached) * 1024) : NULL;
fmt_human_2((total - free - buffers - cached) * 1024, "B") : NULL;
}
#elif defined(__OpenBSD__)
#include <stdlib.h>
@ -83,7 +83,7 @@
if (load_uvmexp(&uvmexp)) {
free_pages = uvmexp.npages - uvmexp.active;
return fmt_scaled(pagetok(free_pages, uvmexp.pageshift) * 1024);
return fmt_human_2(pagetok(free_pages, uvmexp.pageshift) * 1024, "B");
}
return NULL;
@ -109,7 +109,7 @@
struct uvmexp uvmexp;
if (load_uvmexp(&uvmexp)) {
return fmt_scaled(pagetok(uvmexp.npages, uvmexp.pageshift) * 1024);
return fmt_human_2(pagetok(uvmexp.npages, uvmexp.pageshift) * 1024, "B");
}
return NULL;
@ -121,7 +121,7 @@
struct uvmexp uvmexp;
if (load_uvmexp(&uvmexp)) {
return fmt_scaled(pagetok(uvmexp.active, uvmexp.pageshift) * 1024);
return fmt_human_2(pagetok(uvmexp.active, uvmexp.pageshift) * 1024, "B");
}
return NULL;

12
components/swap.c
View file

@ -48,7 +48,7 @@
}
sscanf(match, "SwapFree: %ld kB\n", &free);
return fmt_scaled(free * 1024);
return fmt_human_2(free * 1024, "B");
}
const char *
@ -94,7 +94,7 @@
}
sscanf(match, "SwapTotal: %ld kB\n", &total);
return fmt_scaled(total * 1024);
return fmt_human_2(total * 1024, "B");
}
const char *
@ -122,7 +122,7 @@
}
sscanf(match, "SwapFree: %ld kB\n", &free);
return fmt_scaled((total - free - cached) * 1024);
return fmt_human_2((total - free - cached) * 1024, "B");
}
#elif defined(__OpenBSD__)
#include <stdlib.h>
@ -174,7 +174,7 @@
getstats(&total, &used);
return fmt_scaled((total - used) * 1024);
return fmt_human_2((total - used) * 1024, "B");
}
const char *
@ -194,7 +194,7 @@
getstats(&total, &used);
return fmt_scaled(total * 1024);
return fmt_human_2(total * 1024, "B");
}
const char *
@ -204,6 +204,6 @@
getstats(&total, &used);
return fmt_scaled(used * 1024);
return fmt_human_2(used * 1024, "B");
}
#endif

32
util.c
View file

@ -87,19 +87,35 @@ bprintf(const char *fmt, ...)
}
const char *
fmt_scaled(size_t bytes)
fmt_human_2(size_t num, char *unit)
{
unsigned int i;
float scaled;
const char *units[] = { "B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB",
"ZiB", "YiB" };
size_t i;
double scaled;
const char *prefix[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei",
"Zi", "Yi" };
scaled = bytes;
for (i = 0; i < LEN(units) && scaled >= 1024; i++) {
scaled = num;
for (i = 0; i < LEN(prefix) && scaled >= 1024; i++) {
scaled /= 1024.0;
}
return bprintf("%.1f%s", scaled, units[i]);
return bprintf("%.1f%s%s", scaled, prefix[i], unit);
}
const char *
fmt_human_10(size_t num, char *unit)
{
size_t i;
double scaled;
const char *prefix[] = { "", "K", "M", "G", "T", "P", "E",
"Z", "Y" };
scaled = num;
for (i = 0; i < LEN(prefix) && scaled >= 1000; i++) {
scaled /= 1000.0;
}
return bprintf("%.1f%s%s", scaled, prefix[i], unit);
}
int

3
util.h
View file

@ -10,5 +10,6 @@ void die(const char *, ...);
int esnprintf(char *str, size_t size, const char *fmt, ...);
const char *bprintf(const char *fmt, ...);
const char *fmt_scaled(size_t);
const char *fmt_human_2(size_t num, char *unit);
const char *fmt_human_10(size_t num, char *unit);
int pscanf(const char *path, const char *fmt, ...);