diff options
| author | Yukihiro "Matz" Matsumoto <[email protected]> | 2021-08-31 13:00:15 +0900 |
|---|---|---|
| committer | Yukihiro "Matz" Matsumoto <[email protected]> | 2021-09-01 07:00:55 +0900 |
| commit | 3622f2c4b51d4b1f9eb0a2470ea7cd2ee24fe3a5 (patch) | |
| tree | 257435cdb71a3431e77df7620a04a77007d3cda1 /mrblib/string.rb | |
| parent | 2c41739b66e34ee20f614e4793dfb1dba4fd7274 (diff) | |
| download | mruby-3622f2c4b51d4b1f9eb0a2470ea7cd2ee24fe3a5.tar.gz mruby-3622f2c4b51d4b1f9eb0a2470ea7cd2ee24fe3a5.zip | |
string.c: implement `__sub_replace()` in C.
To reduce number of string allocation.
Diffstat (limited to 'mrblib/string.rb')
| -rw-r--r-- | mrblib/string.rb | 37 |
1 files changed, 5 insertions, 32 deletions
diff --git a/mrblib/string.rb b/mrblib/string.rb index 7c90303ae..2b3178688 100644 --- a/mrblib/string.rb +++ b/mrblib/string.rb @@ -42,32 +42,6 @@ class String self end - # private method for gsub/sub - def __sub_replace(rep, pre, m, post) - s = "" - i = 0 - while j = rep.index("\\", i) - break if j == rep.length-1 - t = case rep[j+1] - when "\\" - "\\" - when "`" - pre - when "&", "0" - m - when "'" - post - when "1", "2", "3", "4", "5", "6", "7", "8", "9" - "" - else - rep[j, 2] - end - s += rep[i, j-i] + t - i = j + 2 - end - s + rep[i, rep.length-i] - end - ## # Replace all matches of +pattern+ with +replacement+. # Call block (if given) for each match and replace @@ -92,7 +66,7 @@ class String result << if block block.call(pattern).to_s else - __sub_replace(replace, self[0, found], pattern, self[offset..-1] || "") + self.__sub_replace(replace, pattern, found) end if plen == 0 result << self[offset, 1] @@ -145,17 +119,16 @@ class String block = nil end result = [] - this = dup found = index(pattern) - return this unless found - result << this[0, found] + return self.dup unless found + result << self[0, found] offset = found + pattern.length result << if block block.call(pattern).to_s else - __sub_replace(replace, this[0, found], pattern, this[offset..-1] || "") + self.__sub_replace(replace, pattern, found) end - result << this[offset..-1] if offset < length + result << self[offset..-1] if offset < length result.join end |