[GitHub] [arrow] pitrou commented on a diff in pull request #14191: ARROW-17798: [C++][Parquet] Add DELTA_BINARY_PACKED encoder to Parquet writer

[GitBox]

pitrou commented on code in PR #14191:
URL: https://github.com/apache/arrow/pull/14191#discussion_r1030545123


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cpp/src/arrow/util/bit_stream_utils.h:
##########
@@ -204,8 +204,8 @@ class BitReader {
 
 inline bool BitWriter::PutValue(uint64_t v, int num_bits) {
   // TODO: revisit this limit if necessary (can be raised to 64 by fixing some 
edge cases)
-  DCHECK_LE(num_bits, 32);
-  DCHECK_EQ(v >> num_bits, 0) << "v = " << v << ", num_bits = " << num_bits;
+  DCHECK_LE(num_bits, 64);
+  //  DCHECK_EQ(v >> num_bits, 0) << "v = " << v << ", num_bits = " << 
num_bits;

Review Comment:
   Or you can try avoiding the check in case num_bits is 64.
   ```suggestion
     if (num_bits < 64) {
       DCHECK_EQ(v >> num_bits, 0) << "v = " << v << ", num_bits = " << 
num_bits;
     }
   ```



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