ECVT(III) 4/30/73 ECVT(III)
NAME
ecvt - output conversion
SYNOPSIS
jsr pc,ecvt
jsr pc,fcvt
char *ecvt(value, ndigit, decpt, sign)
double value;
int ndigit, *decpt, *sign;
char *fcvt(value, ndigit, decpt, sign)
...
DESCRIPTION
Ecvt is called with a floating point number in fr0.
On exit, the number has been converted into a string of
ascii digits in a buffer pointed to by r0. The number of
digits produced is controlled by a global variable _ndigits.
Moreover, the position of the decimal point is contained in
r2: r2=0 means the d.p. is at the left hand end of the
string of digits; r2>0 means the d.p. is within or to the
right of the string.
The sign of the number is indicated by r1 (0 for +; 1 for
-).
The low order digit has suffered decimal rounding (i. e. may
have been carried into).
From C, the value is converted and a pointer to a null-
terminated string of ndigit digits is returned. The
position of the decimal point is stored indirectly through
decpt (negative means to the left of the returned digits).
If the sign of the result is negative, the word pointed to
by sign is non-zero, otherwise it is zero.
Fcvt is identical to ecvt, except that the correct digit has
had decimal rounding for F-style output of the number of
digits specified by _ndigits.
SEE ALSO
printf(III)
BUGS