man(1) Manual page archive


NAME
     ecvt, fcvt - 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 posi-
     tion 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
     been rounded for F-style output of the number of digits
     specified by *_ndigits.

SEE ALSO
     printf (III)

BUGS

 1