Provided by: libpcp3-dev_6.2.0-1.1build4_amd64 
NAME
pmNumberStr, pmNumberStr_r - fixed width output format for numbers
C SYNOPSIS
#include <pcp/pmapi.h>
const char *pmNumberStr(double value);
char *pmNumberStr_r(double value, char *buf, int buflen);
cc ... -lpcp
DESCRIPTION
pmNumberStr returns the address of a 8-byte buffer that holds a null-byte terminated representation of
value suitable for output with fixed width fields. The pmNumberStr_r function does the same, but stores
the result in a user-supplied buffer buf of length buflen, which should have room for at least 8 bytes.
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.
NOTES
pmNumberStr returns a pointer to a static buffer and hence is not thread-safe. Multi-threaded
applications should use pmNumberStr_r instead.
SEE ALSO
printf(3)
Performance Co-Pilot PCP PMNUMBERSTR(3)