diff options
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 */ |