Posted on May 17, 2011 at 12:26I used this ftoa fun it doesnt working.
same function was working in PC version compiler
is there any options to add for floating point operations?
i also add the options like -mfpu=vfp -mfloat-abi-softfp
but it also didnt work how to resolve this?
let me know
int my_ftoa (float x, char *str, char prec, char format)
{
/* converts a floating point number to an ascii string */
/* x is stored into str, which should be at least 30 chars long */
int ie, i, k, ndig, fstyle;
double y;
//if (nargs() != 7)
// print_text(''ftoa '');
//ndig = ( prec<=0) ? 7 : (prec > 22 ? 23 : prec+1);
ndig = prec+1;
if(format == 'f' || format == 'F')
fstyle = 1;
else
fstyle = 0;
/* print in e format unless last arg is 'f' */
ie = 0;
/* if x negative, write minus and reverse */
if ( x < 0)
{
*str++ = '-';
x = -x;
}
// put x in range 1 <= x < 10
if (x > 0.0) while (x < 1.0)
{
x =x*10.0;
ie--;
}
while (x >= 10.0)
{
x = x/10.0;
ie++;
}
/* in f format, number of digits is related to size */
if (fstyle)
ndig =ndig + ie;
/* round. x is between 1 and 10 and ndig will be printed to
right of decimal point so rounding is ... */
for (y = i = 1; i < ndig; i++)
y = y/10.0;
x =x+ y/2.0;
//if (x >= 10.0) {x = 1.0; ie++;} /* repair rounding disasters */
/* now loop. put out a digit (obtain by multiplying by
10, truncating, subtracting) until enough digits out */
/* if fstyle, and leading zeros, they go out special */
if (fstyle && ie
{
*str++ = '0'; *str++ = '.';
if (ndig < 0) ie = ie-ndig; /* limit zeros if underflow */
for (i = -1; i > ie; i--)
*str++ = '0';
}
for (i=0; i < ndig; i++)
{
k = x;
*str++ = k + '0';
if (i == (fstyle ? ie : 0)) /* where is decimal point */
*str++ = '.';
x =- (y=k);
x =x*10.0;
}
/* now, in estyle, put out exponent if not zero */
if (!fstyle && ie != 0)
{
*str++ = 'E';
if (ie < 0)
{
ie = -ie;
*str++ = '-';
}
for (k=100; k > ie; k =k/10);
for (; k > 0; k =k/10)
{
*str++ = ie/k + '0';
ie = ie%k;
}
}
*str = '\0';
return 0;
}
and I want to convert a floating point to an integer, store the value in int format, in the above functions it hangs
how to resolve this problem? can anyone help me?
regards
nagendra
