AntoinePrv commented on code in PR #47294:
URL: https://github.com/apache/arrow/pull/47294#discussion_r2333879793


##########
cpp/src/arrow/util/bit_stream_utils_internal.h:
##########
@@ -483,13 +496,17 @@ inline bool BitReader::GetZigZagVlqInt(int32_t* v) {
 }
 
 inline bool BitWriter::PutVlqInt(uint64_t v) {
-  bool result = true;
-  while ((v & 0xFFFFFFFFFFFFFF80ULL) != 0ULL) {
-    result &= PutAligned<uint8_t>(static_cast<uint8_t>((v & 0x7F) | 0x80), 1);
-    v >>= 7;
+  constexpr auto kMaxBytes = bit_util::MaxLEB128ByteLenFor<decltype(v)>;

Review Comment:
   That's member of the reader that was kept for compatibility.



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