/*In Xcode, FLT_EPSILON is 1.192..x10-7, but the diff between value-roundf(value) can be 3.05..x10-5, when the input value was a 24.8 Fixed. */
static void writeReal(ufwCtx h, float value) {
char buf[50];
/* if no decimal component, perform a faster to string conversion */
if ((fabs(value - roundf(value)) < TX_EPSILON) && value > LONG_MIN && value < LONG_MAX)
ufw_ltoa(buf, (long)roundf(value));
else
ctuDtostr(buf, sizeof(buf), value, 0, 2);
writeBuf(h, strlen(buf), buf);
}
/* Save real number arg in DICT. If not fractional save as integer. */
void cfwDictSaveReal(DICT *dict, float r) {
char buf[50];
int value; /* Current nibble value */
int last = 0; /* Last nibble value */
int odd = 0; /* Flags odd nibble */
long i = (long)r;
if (i == r) {
/* Value was integer */
cfwDictSaveInt(dict, i);
return;
}
/* Convert to string; 8 digits of precision is enough to accurately
represent the matrix of a typical TrueType font using a 2048 unit em */
ctuDtostr(buf, r, 0, 8);
*dnaNEXT(*dict) = cff_BCD;
for (i = buf[0] == '0';; i++) {
switch (buf[i]) {
case '\0':
/* Terminate number */
*dnaNEXT(*dict) = odd ? last << 4 | 0xf : 0xff;
return;
case '+':
continue;
case '-':
value = 0xe;
break;
case '.':
value = 0xa;
break;
case 'E':
case 'e':
value = (buf[++i] == '-') ? 0xc : 0xb;
break;
default:
value = buf[i] - '0';
break;
}
if (odd) {
*dnaNEXT(*dict) = last << 4 | value;
}
else {
last = value;
}
odd = !odd;
}
}
/* Save real number arg in DICT. If not fractional save as integer. */
void cfwDictSaveReal(DICT *dict, float r) {
char buf[50];
int value; /* Current nibble value */
int last = 0; /* Last nibble value */
int odd = 0; /* Flags odd nibble */
long i = (long)r;
if (i == r) {
/* Value was integer */
cfwDictSaveInt(dict, i);
return;
}
ctuDtostr(buf, r, 0, 8); /* 8 places is as good as it gets when converting ASCII real numbers->float-> ASCII real numbers, as happens to all the PrivateDict values.*/
*dnaNEXT(*dict) = cff_BCD;
for (i = buf[0] == '0';; i++) {
switch (buf[i]) {
case '\0':
/* Terminate number */
*dnaNEXT(*dict) = odd ? last << 4 | 0xf : 0xff;
return;
case '+':
continue;
case '-':
value = 0xe;
break;
case '.':
value = 0xa;
break;
case 'E':
case 'e':
value = (buf[++i] == '-') ? 0xc : 0xb;
break;
default:
value = buf[i] - '0';
break;
}
if (odd) {
*dnaNEXT(*dict) = last << 4 | value;
}
else {
last = value;
}
odd = !odd;
}
}
