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CentOS 7.0 - man page for fcvt_r (centos section 3)

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ECVT_R(3)			    Linux Programmer's Manual				ECVT_R(3)

NAME
       ecvt_r, fcvt_r, qecvt_r, qfcvt_r - convert a floating-point number to a string

SYNOPSIS
       #include <stdlib.h>

       int ecvt_r(double number, int ndigits, int *decpt,
		  int *sign, char *buf, size_t len);

       int fcvt_r(double number, int ndigits, int *decpt,
		  int *sign, char *buf, size_t len);

       int qecvt_r(long double number, int ndigits, int *decpt,
		  int *sign, char *buf, size_t len);

       int qfcvt_r(long double number, int ndigits, int *decpt,
		  int *sign, char *buf, size_t len);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       ecvt_r(), fcvt_r(), qecvt_r(), qfcvt_r():
	   _SVID_SOURCE || _BSD_SOURCE || _XOPEN_SOURCE >= 500

DESCRIPTION
       The  functions  ecvt_r(),  fcvt_r(),  qecvt_r()	and  qfcvt_r()	are identical to ecvt(3),
       fcvt(3), qecvt(3) and qfcvt(3), respectively, except that they do not return their  result
       in  a  static  buffer,  but  instead  use  the  supplied buf of size len.  See ecvt(3) and
       qecvt(3).

RETURN VALUE
       These functions return 0 on success, and -1 otherwise.

CONFORMING TO
       These functions are GNU extensions.

NOTES
       These functions are obsolete.  Instead, sprintf(3) is recommended.

SEE ALSO
       ecvt(3), qecvt(3), sprintf(3)

COLOPHON
       This page is part of release 3.53 of the Linux man-pages project.  A  description  of  the
       project,     and    information	  about    reporting	bugs,	 can	be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU					    2007-07-26					ECVT_R(3)
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