emkornfield commented on a change in pull request #8475:
URL: https://github.com/apache/arrow/pull/8475#discussion_r508791783
##########
File path: cpp/src/arrow/util/basic_decimal.cc
##########
@@ -775,4 +833,119 @@ int32_t BasicDecimal128::CountLeadingBinaryZeros() const {
}
}
+#if ARROW_LITTLE_ENDIAN
+BasicDecimal256::BasicDecimal256(const uint8_t* bytes)
+ : little_endian_array_(
+ std::array<uint64_t, 4>({reinterpret_cast<const uint64_t*>(bytes)[0],
+ reinterpret_cast<const uint64_t*>(bytes)[1],
+ reinterpret_cast<const uint64_t*>(bytes)[2],
+ reinterpret_cast<const
uint64_t*>(bytes)[3]})) {}
+#else
+BasicDecimal256::BasicDecimal256(const uint8_t* bytes)
+ : little_endian_array_(
+ std::array<uint64_t, 4>({reinterpret_cast<const uint64_t*>(bytes)[3],
+ reinterpret_cast<const uint64_t*>(bytes)[2],
+ reinterpret_cast<const uint64_t*>(bytes)[1],
+ reinterpret_cast<const
uint64_t*>(bytes)[0]})) {
+#endif
+
+BasicDecimal256& BasicDecimal256::Negate() {
+ uint64_t carry = 1;
+ for (uint64_t& elem : little_endian_array_) {
+ elem = ~elem + carry;
+ carry &= (elem == 0);
+ }
+ return *this;
+}
+
+BasicDecimal256& BasicDecimal256::Abs() { return *this < 0 ? Negate() : *this;
}
+
+BasicDecimal256 BasicDecimal256::Abs(const BasicDecimal256& in) {
+ BasicDecimal256 result(in);
+ return result.Abs();
+}
+
+std::array<uint8_t, 32> BasicDecimal256::ToBytes() const {
+ std::array<uint8_t, 32> out{{0}};
+ ToBytes(out.data());
+ return out;
+}
+
+void BasicDecimal256::ToBytes(uint8_t* out) const {
+ DCHECK_NE(out, nullptr);
+#if ARROW_LITTLE_ENDIAN
+ reinterpret_cast<int64_t*>(out)[0] = little_endian_array_[0];
+ reinterpret_cast<int64_t*>(out)[1] = little_endian_array_[1];
+ reinterpret_cast<int64_t*>(out)[2] = little_endian_array_[2];
+ reinterpret_cast<int64_t*>(out)[3] = little_endian_array_[3];
+#else
+ reinterpret_cast<int64_t*>(out)[0] = little_endian_array_[3];
+ reinterpret_cast<int64_t*>(out)[1] = little_endian_array_[2];
+ reinterpret_cast<int64_t*>(out)[2] = little_endian_array_[1];
+ reinterpret_cast<int64_t*>(out)[3] = little_endian_array_[0];
Review comment:
fixed
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
