Package: grep Tags: patch When matched characters to a regular expression is found by kwsexec or dfaexec, we need check whether it is in the middle of a multi-byte character.
`is_mb_middle' of searchutils.c is used for it. However, it's expensive, even if most of them contain constitute with single-byte characters. For example, a source code written in a language with multibyte characters, has a lot of single-byte characters. Now, I post the patch which optimizes `is_mb_middle'. It checks whether each single-byte is completion as an character before execution, and caches them. In addition, for UTF-8 further optimization is performed. Only when it's impossible to determine the length of a multibyte character with caches, the length is determined with `mbrlen' in execution.
is_mb_middle.txt
Description: Binary data
