p___mNumberStr.3 - Online Linux Manual Page

PMNUMBERSTR - Online Linux Manual PageSection : 3
Updated : PCP
Source : Performance Co-Pilot

NAMEpmNumberStr, 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

DESCRIPTIONpmNumberStr 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 ( \f(CRd\f1 represents a decimal digit): value rangeformat
> 999995000000000 inf? 999995000000000 − 999995000000ddd.ddT
999995000000 − 999995000ddd.ddG
999995000 − 999995ddd.ddM
999995 − 999.995ddd.ddK
999.995 − 0.005ddd.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.

NOTESpmNumberStr returns a pointer to a static buffer and hence is not thread-safe. Multi-threaded applications should use pmNumberStr_r instead.

SEE ALSOprintf(3) 0

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