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| author | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2023-11-11 18:49:19 +0900 |
|---|---|---|
| committer | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2023-11-11 19:26:13 +0900 |
| commit | 64f03460bae489b94684c6b0aa16e5a19e06f836 (patch) | |
| tree | 03a364e89b4abf917f8a8dc56e79d9bf628aeb79 /include/ruby/util.h | |
| parent | 9eac9d71786a8dbec520d0541a91149f01adf8ea (diff) | |
[DOC] Update comment for `DECIMAL_SIZE_OF_BITS`
Diffstat (limited to 'include/ruby/util.h')
| -rw-r--r-- | include/ruby/util.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/ruby/util.h b/include/ruby/util.h index ee11bc940a..12e69c4b80 100644 --- a/include/ruby/util.h +++ b/include/ruby/util.h @@ -33,7 +33,9 @@ RBIMPL_SYMBOL_EXPORT_BEGIN() -/** an approximation of ceil(n * log10(2)), up to 65536 at least */ +/** an approximation of ceil(n * log10(2)), up to 1,048,576 (1<<20) + * without overflow within 32-bit calculation + */ #define DECIMAL_SIZE_OF_BITS(n) (((n) * 3010 + 9998) / 9999) /** an approximation of decimal representation size for n-bytes */ |