PMNUMBERSTR(3)
NAME
pmNumberStr - fixed width output format for numbers
C SYNOPSIS
#include <pcp/pmapi.h>
const char *pmNumberStr(double value)
cc ... -lpcp
DESCRIPTION
pmNumberStr returns the address of a static 8-byte buffer that holds a
null-byte terminated representation of value suitable for output with
fixed width fields.
The value is scaled using multipliers in powers of ``one thousand''
(the decimal ``kilo'') and has a bias that provides greater precision
for positive numbers as opposed to negative numbers.
- The format depends on the sign and magnitude of value as follows (d
represents a decimal digit):
- +----------------------------------+---------+
| value range | format |
+----------------------------------+---------+
| > 999995000000000 | inf? |
|999995000000000 - 999995000000 | ddd.ddT |
| 999995000000 - 999995000 | ddd.ddG |
| 999995000 - 999995 | ddd.ddM |
| 999995 - 999.995 | ddd.ddK |
| 999.995 - 0.005 | ddd.dd |
| 0.005 - -0.005 | 0.00 |
| -0.005 - -99.95 | -dd.dd |
| -99.995 - -99995 | -dd.ddK |
| -99995 - -99995000 | -dd.ddM |
| -99995000 - -99995000000 | -dd.ddG |
| -99995000000 - -99995000000000 | -dd.ddT |
| < -99995000000000 | -inf? |
+----------------------------------+---------+ - At the boundary points of the ranges, the chosen format will retain the maximum number of significant digits.