unsigned int
sp_svg_number_write_de (gchar *buf, double val, unsigned int tprec, unsigned int padf)
{
if ((val == 0.0) || ((fabs (val) >= 0.1) && (fabs(val) < 10000000))) {
return sp_svg_number_write_d (buf, val, tprec, 0, padf);
} else {
double eval;
int p;
eval = floor (log10 (fabs (val)));
val = val / pow (10.0, eval);
p = sp_svg_number_write_d (buf, val, tprec, 0, padf);
buf[p++] = 'e';
p += sp_svg_number_write_i (buf + p, (int) eval);
return p;
}
}
unsigned int sp_svg_number_write_de(gchar *buf, int bufLen, double val, unsigned int tprec, int min_exp)
{
int eval = (int)floor(log10(fabs(val)));
if (val == 0.0 || eval < min_exp) {
return sp_svg_number_write_ui(buf, 0);
}
unsigned int maxnumdigitsWithoutExp = // This doesn't include the sign because it is included in either representation
eval<0?tprec+(unsigned int)-eval+1:
eval+1<(int)tprec?tprec+1:
(unsigned int)eval+1;
unsigned int maxnumdigitsWithExp = tprec + ( eval<0 ? 4 : 3 ); // It's not necessary to take larger exponents into account, because then maxnumdigitsWithoutExp is DEFINITELY larger
if (maxnumdigitsWithoutExp <= maxnumdigitsWithExp) {
return sp_svg_number_write_d(buf, bufLen, val, tprec, 0);
} else {
val = eval < 0 ? val * pow(10.0, -eval) : val / pow(10.0, eval);
int p = sp_svg_number_write_d(buf, bufLen, val, tprec, 0);
buf[p++] = 'e';
p += sp_svg_number_write_i(buf + p, bufLen - p, eval);
return p;
}
}
