Datum decimal64_inc(PG_FUNCTION_ARGS)
{
PGDecimal64 a = PG_GETARG_DECIMAL64(0);
PGDecimal64 one;
PGDecimal64 ret;
DECLARE_DEC_CTXT(DEC_INIT_DECIMAL64);
decDoubleFromInt32(&one, 1);
decDoubleAdd(&ret, &a, &one, &dc);
PG_RETURN_DECIMAL64(ret);
}
Datum decimal64_add(PG_FUNCTION_ARGS)
{
PGDecimal64 a = PG_GETARG_DECIMAL64(0);
PGDecimal64 b = PG_GETARG_DECIMAL64(1);
PGDecimal64 ret;
DECLARE_DEC_CTXT(DEC_INIT_DECIMAL64);
decDoubleAdd(&ret, &a, &b, &dc);
DEC_CHK_STATUS(dc, DEC_STATUS_OFUF, "decimal64 overflow");
PG_RETURN_DECIMAL64(ret);
}
int testDecDouble()
{
int i;
decDouble a, b;
decContext set;
char string[DECDOUBLE_String];
decContextDefault(&set, DEC_INIT_DECDOUBLE); // initialize
decDoubleFromString(&a, "0.13", &set);
decDoubleFromString(&b, "8.7", &set);
for (i = 0; i < 10; i++)
decDoubleAdd(&b, &a, &b, &set); // b += a;
decDoubleToString(&b, string);
printf("dec064: 8.7 + 0.13 * 10 => %s\n", string);
return 0;
}