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/* minimal version of PG 9.6's float8out_internal function for use in 9.4 and 9.5 */
/* With the adaption of ryn in PG 12, it is now used for all versions */
#define MAXDOUBLEWIDTH 128
extern int extra_float_digits;
static char *
float8out_unit(double num)
{
char *ascii = (char *) palloc(MAXDOUBLEWIDTH + 1);
int extradigits =
#if PG_VERSION_NUM >= 120000
extra_float_digits == 1 ? 0 : extra_float_digits;
#else
extra_float_digits;
#endif
int ndig = DBL_DIG + extradigits;
if (isnan(num))
return strcpy(ascii, "NaN");
if (!isfinite(num)) {
if (num > 0)
return strcpy(ascii, "Infinity");
else
return strcpy(ascii, "-Infinity");
}
if (ndig < 1)
ndig = 1;
snprintf(ascii, MAXDOUBLEWIDTH + 1, "%.*g", ndig, num);
return ascii;
}
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