diff support/casc/jenkins96.lua @ 65:8b8b0bade520

Fixed support for mounts using the new MountJournal and mount IDs (no conversion of old profiles at the moment).
author Jerome Vuarand <jerome.vuarand@gmail.com>
date Thu, 23 Oct 2014 13:44:59 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/support/casc/jenkins96.lua	Thu Oct 23 13:44:59 2014 +0100
@@ -0,0 +1,38 @@
+local M, plat, bin = {}, require("casc.platform"), require("casc.bin")
+
+local rot, xor, uint32_le, to_le32 = plat.rol, plat.bxor, bin.uint32_le, bin.to_le32
+
+function M.hash(k)
+	assert(type(k) == "string", 'Syntax: casc.jenkins96.hash("key")')
+	
+	if #k == 0 then return 0xdeadbeef, 0xdeadbeef end
+	local a = 0xdeadbeef + #k
+	local b, c, k = a, a, k .. (k ~= "" and ("\0"):rep((12 - #k % 12) % 12) or "")
+	for i=0, #k-13, 12 do
+		a, b, c = a + uint32_le(k, i), b + uint32_le(k, i+4), c + uint32_le(k, i+8)
+		a = xor(a-c, rot(c, 4)); c = c + b
+	   b = xor(b-a, rot(a, 6)); a = a + c
+	   c = xor(c-b, rot(b, 8)); b = b + a
+	   a = xor(a-c, rot(c,16)); c = c + b
+	   b = xor(b-a, rot(a,19)); a = a + c
+	   c = xor(c-b, rot(b, 4)); b = b + a
+	end
+	local i = #k - 12
+	a, b, c = a + uint32_le(k, i), b + uint32_le(k, i+4), c + uint32_le(k, i+8)
+	c = xor(c, b) - rot(b,14)
+	a = xor(a, c) - rot(c,11)
+	b = xor(b, a) - rot(a,25)
+	c = xor(c, b) - rot(b,16)
+	a = xor(a, c) - rot(c,04)
+	b = xor(b, a) - rot(a,14)
+	c = xor(c, b) - rot(b,24)
+	return c, b
+end
+
+function M.hash_path(path)
+	assert(type(path) == "string", 'Syntax: casc.jenkins96.hash_path("path")')
+	local c, b = M.hash((path:upper():gsub('/', '\\')))
+	return to_le32(b) .. to_le32(c)
+end
+
+return M
\ No newline at end of file