diff options
Diffstat (limited to 'lib/pure')
| -rw-r--r-- | lib/pure/hashes.nim | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/pure/hashes.nim b/lib/pure/hashes.nim index 11af81149..17d1c6442 100644 --- a/lib/pure/hashes.nim +++ b/lib/pure/hashes.nim @@ -127,6 +127,15 @@ proc hash*(x: string): Hash = h = h !& ord(x[i]) result = !$h +proc hash*(x: cstring): Hash = + ## efficient hashing of null-terminated strings + var h: Hash = 0 + var i = 0 + while x[i] != 0.char: + h = h !& ord(x[i]) + inc i + result = !$h + proc hash*(sBuf: string, sPos, ePos: int): Hash = ## efficient hashing of a string buffer, from starting ## position `sPos` to ending position `ePos` @@ -239,6 +248,7 @@ proc hash*[A](x: set[A]): Hash = when isMainModule: doAssert( hash("aa bb aaaa1234") == hash("aa bb aaaa1234", 0, 13) ) + doAssert( hash("aa bb aaaa1234") == hash(cstring("aa bb aaaa1234")) ) doAssert( hashIgnoreCase("aa bb aaaa1234") == hash("aa bb aaaa1234") ) doAssert( hashIgnoreStyle("aa bb aaaa1234") == hashIgnoreCase("aa bb aaaa1234") ) let xx = @['H','e','l','l','o'] |