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Improve & optimize strutils 'find' procs (#5196)

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* add 'last' argument to 'find' procs in strutils
* add 'rfind' proc for looking up set[char] in strutils
* use optimised C function 'memchr' when available
This commit is contained in:
Parashurama
2017-01-11 09:48:31 +01:00
committed by Andreas Rumpf
parent abe5cb82a0
commit d04ca6ef23
2 changed files with 76 additions and 15 deletions
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27
tests/stdlib/tstrutil.nim
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@@ -64,7 +64,34 @@ proc testDelete =
delete(s, 0, 0)
assert s == "1236789ABCDEFG"
proc testFind =
assert "0123456789ABCDEFGH".find('A') == 10
assert "0123456789ABCDEFGH".find('A', 5) == 10
assert "0123456789ABCDEFGH".find('A', 5, 10) == 10
assert "0123456789ABCDEFGH".find('A', 5, 9) == -1
assert "0123456789ABCDEFGH".find("A") == 10
assert "0123456789ABCDEFGH".find("A", 5) == 10
assert "0123456789ABCDEFGH".find("A", 5, 10) == 10
assert "0123456789ABCDEFGH".find("A", 5, 9) == -1
assert "0123456789ABCDEFGH".find({'A'..'C'}) == 10
assert "0123456789ABCDEFGH".find({'A'..'C'}, 5) == 10
assert "0123456789ABCDEFGH".find({'A'..'C'}, 5, 10) == 10
assert "0123456789ABCDEFGH".find({'A'..'C'}, 5, 9) == -1
proc testRFind =
assert "0123456789ABCDEFGAH".rfind('A') == 17
assert "0123456789ABCDEFGAH".rfind('A', 13) == 10
assert "0123456789ABCDEFGAH".rfind('H', 13) == -1
assert "0123456789ABCDEFGAH".rfind("A") == 17
assert "0123456789ABCDEFGAH".rfind("A", 13) == 10
assert "0123456789ABCDEFGAH".rfind("H", 13) == -1
assert "0123456789ABCDEFGAH".rfind({'A'..'C'}) == 17
assert "0123456789ABCDEFGAH".rfind({'A'..'C'}, 13) == 12
assert "0123456789ABCDEFGAH".rfind({'G'..'H'}, 13) == -1
testDelete()
testFind()
testRFind()
assert(insertSep($1000_000) == "1_000_000")
assert(insertSep($232) == "232")