FreeBSD Manual Pages
Tcl_PrintDouble(3) Tcl Library Procedures Tcl_PrintDouble(3) ______________________________________________________________________________ NAME Tcl_PrintDouble - Convert floating value to string SYNOPSIS #include <tcl.h> Tcl_PrintDouble(interp, value, dst) ARGUMENTS Tcl_Interp *interp (in) Before Tcl 8.0, the tcl_precision variable in this interpreter con- trolled the conversion. As of Tcl 8.0, this argument is ignored and the conversion is controlled by the tcl_precision variable that is now shared by all interpreters. double value (in) Floating-point value to be converted. char *dst (out) Where to store the string representing value. Must have at least TCL_DOU- BLE_SPACE characters of storage. ______________________________________________________________________________ DESCRIPTION Tcl_PrintDouble generates a string that represents the value of value and stores it in memory at the location given by dst. It uses %g for- mat to generate the string, with one special twist: the string is guar- anteed to contain either a "." or an "e" so that it does not look like an integer. Where %g would generate an integer with no decimal point, Tcl_PrintDouble adds ".0". If the tcl_precision value is non-zero, the result will have precisely that many digits of significance. If the value is zero (the default), the result will have the fewest digits needed to represent the number in such a way that Tcl_NewDoubleObj will generate the same number when presented with the given string. IEEE semantics of rounding to even apply to the conversion. KEYWORDS conversion, double-precision, floating-point, string Tcl 8.0 Tcl_PrintDouble(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | KEYWORDS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=Tcl_PrintDouble.tcl86&sektion=3&manpath=FreeBSD+Ports+14.3.quarterly>