ViniciusSouzaRoque commented on a change in pull request #12306:
URL: https://github.com/apache/arrow/pull/12306#discussion_r797650455
##########
File path: cpp/src/gandiva/gdv_function_stubs.cc
##########
@@ -683,6 +683,202 @@ const char* gdv_fn_upper_utf8(int64_t context, const
char* data, int32_t data_le
return out;
}
+GDV_FORCE_INLINE
+uint64_t unsigned_long_div(gdv_int64 x, gdv_int32 m) {
+ if (x >= 0) {
+ return x / m;
+ }
+ return x / m + 2 * (LONG_MAX / m) + 2 / m + (x % m + 2 * (LONG_MAX % m) + 2
% m) / m;
+}
+
+GDV_FORCE_INLINE
+gdv_int64 encode(gdv_int32 radix, gdv_int32 fromPos, const char* value,
+ gdv_int32 valueLen) {
+ uint64_t val = 0;
+ uint64_t bound = unsigned_long_div(-1 - radix, radix);
+
+ for (int i = fromPos; i < valueLen && value[i] >= 0; i++) {
+ if (val >= bound) {
+ if (unsigned_long_div(-1 - value[i], radix) < val) {
+ return -1;
+ }
+ }
+ val = val * radix + value[i];
+ }
+ return val;
+}
+
+GDV_FORCE_INLINE
+void decode(gdv_int64 val, gdv_int32 radix, char* value, gdv_int32 valueLen) {
+ for (int i = 0; i < valueLen; i++) {
+ value[i] = static_cast<char>(0);
+ }
+
+ for (int i = valueLen - 1; val != 0; i--) {
+ gdv_int64 q = unsigned_long_div(val, radix);
+ value[i] = static_cast<char>((val - q * radix));
+ val = q;
+ }
+}
+
+GDV_FORCE_INLINE
+char character_for_digit(gdv_int32 value, gdv_int32 radix) { // From Decimal
to Any Base
Review comment:
Done
##########
File path: cpp/src/gandiva/gdv_function_stubs.cc
##########
@@ -683,6 +683,202 @@ const char* gdv_fn_upper_utf8(int64_t context, const
char* data, int32_t data_le
return out;
}
+GDV_FORCE_INLINE
+uint64_t unsigned_long_div(gdv_int64 x, gdv_int32 m) {
+ if (x >= 0) {
+ return x / m;
+ }
+ return x / m + 2 * (LONG_MAX / m) + 2 / m + (x % m + 2 * (LONG_MAX % m) + 2
% m) / m;
+}
+
+GDV_FORCE_INLINE
+gdv_int64 encode(gdv_int32 radix, gdv_int32 fromPos, const char* value,
+ gdv_int32 valueLen) {
+ uint64_t val = 0;
+ uint64_t bound = unsigned_long_div(-1 - radix, radix);
+
+ for (int i = fromPos; i < valueLen && value[i] >= 0; i++) {
+ if (val >= bound) {
+ if (unsigned_long_div(-1 - value[i], radix) < val) {
+ return -1;
+ }
+ }
+ val = val * radix + value[i];
+ }
+ return val;
+}
+
+GDV_FORCE_INLINE
+void decode(gdv_int64 val, gdv_int32 radix, char* value, gdv_int32 valueLen) {
+ for (int i = 0; i < valueLen; i++) {
+ value[i] = static_cast<char>(0);
+ }
+
+ for (int i = valueLen - 1; val != 0; i--) {
+ gdv_int64 q = unsigned_long_div(val, radix);
+ value[i] = static_cast<char>((val - q * radix));
+ val = q;
+ }
+}
+
+GDV_FORCE_INLINE
+char character_for_digit(gdv_int32 value, gdv_int32 radix) { // From Decimal
to Any Base
+ // This function is similar to Character.forDigit in Java
+ int digit = 0;
+ digit = value % radix;
+ if (digit < 10) {
+ return static_cast<char>(digit + '0');
+ } else {
+ return static_cast<char>(digit + 'A' - 10);
+ }
+}
+
+GDV_FORCE_INLINE
+gdv_int64 character_digit(char value, gdv_int32 radix) { // From any base to
Decimal
Review comment:
Done
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