Open System Services Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

fcvt(3) OSS Library Calls Reference Manual
NAME
fcvt - Converts a floating-point number to a string
LIBRARY
G-series native Guardian processes: $SYSTEM.SYSnn.ZCRESRL
G-series native OSS processes: /G/system/sysnn/zcresrl
H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL
32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll
64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll
SYNOPSIS
#include <stdlib.h>
char *fcvt(
double value,
int ndigit,
int *decpt,
int *sign
);
PARAMETERS
value Specifies the floating-point number to be converted.
ndigit Specifies the number of characters that follow the position of the radix character
(decimal point) in the returned string.
decpt Specifies a pointer to an integer that indicates the position of the radix character
(decimal point) relative to the beginning of the returned string.
sign Specifies a pointer to an integer that indicates the sign of value.
DESCRIPTION
The fcvt( ) function converts a floating-point number to a null-terminated string and returns a
pointer to that string.
The fcvt( ) function converts the floating-point number value to a string with ndigit characters
following the radix character (decimal point) and returns a pointer to that string. The resulting
string does not actually contain the radix character. Finally, fcvt( ) also returns an integer indi-
cating the sign of value in the location pointed to by the sign parameter. If value is negative, the
integer is nonzero; otherwise it is 0 (zero). The precision of the type double limits the total
number of characters in the string.
NOTES
The fcvt( ) function can be called only by native processes.
This function supports both IEEE Std 754-1985 floating-point and Tandem floating-point values.
IEEE values can include NaN and infinity, and the sign of 0.0 (zero) can be either positive or
negative. Refer to the fp_class(3) reference page for a description of IEEE value classes.
Guardian functions are available to convert between floating-point formats. Refer to the Guar-
dian Programmer’s Guide for a discussion of floating-point conversions.
CAUTIONS
The return value of the fcvt( ) function points to static data, which will be overwritten by future
calls to this function.
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