Add buzhash from urlblock (under MIT license)

Signed-off-by: Jonathan Dieter <jdieter@gmail.com>

diff --git a/src/buzhash/LICENSE b/src/buzhash/LICENSE
new file mode 100644 (file)
index 0000000..ef6bdaf
--- /dev/null
+++ b/src/buzhash/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2015, the urlblock developers.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

diff --git a/src/buzhash/buzhash.c b/src/buzhash/buzhash.c
new file mode 100644 (file)
index 0000000..f3da669
--- /dev/null
+++ b/src/buzhash/buzhash.c
@@ -0,0 +1,91 @@
+#include "buzhash.h"
+#include "util.h"
+
+#include <string.h>
+
+const uint32_t buzhash_table[] = {
+  0x458be752, 0xc10748cc, 0xfbbcdbb8, 0x6ded5b68,
+  0xb10a82b5, 0x20d75648, 0xdfc5665f, 0xa8428801,
+  0x7ebf5191, 0x841135c7, 0x65cc53b3, 0x280a597c,
+  0x16f60255, 0xc78cbc3e, 0x294415f5, 0xb938d494,
+  0xec85c4e6, 0xb7d33edc, 0xe549b544, 0xfdeda5aa,
+  0x882bf287, 0x3116737c, 0x05569956, 0xe8cc1f68,
+  0x0806ac5e, 0x22a14443, 0x15297e10, 0x50d090e7,
+  0x4ba60f6f, 0xefd9f1a7, 0x5c5c885c, 0x82482f93,
+  0x9bfd7c64, 0x0b3e7276, 0xf2688e77, 0x8fad8abc,
+  0xb0509568, 0xf1ada29f, 0xa53efdfe, 0xcb2b1d00,
+  0xf2a9e986, 0x6463432b, 0x95094051, 0x5a223ad2,
+  0x9be8401b, 0x61e579cb, 0x1a556a14, 0x5840fdc2,
+  0x9261ddf6, 0xcde002bb, 0x52432bb0, 0xbf17373e,
+  0x7b7c222f, 0x2955ed16, 0x9f10ca59, 0xe840c4c9,
+  0xccabd806, 0x14543f34, 0x1462417a, 0x0d4a1f9c,
+  0x087ed925, 0xd7f8f24c, 0x7338c425, 0xcf86c8f5,
+  0xb19165cd, 0x9891c393, 0x325384ac, 0x0308459d,
+  0x86141d7e, 0xc922116a, 0xe2ffa6b6, 0x53f52aed,
+  0x2cd86197, 0xf5b9f498, 0xbf319c8f, 0xe0411fae,
+  0x977eb18c, 0xd8770976, 0x9833466a, 0xc674df7f,
+  0x8c297d45, 0x8ca48d26, 0xc49ed8e2, 0x7344f874,
+  0x556f79c7, 0x6b25eaed, 0xa03e2b42, 0xf68f66a4,
+  0x8e8b09a2, 0xf2e0e62a, 0x0d3a9806, 0x9729e493,
+  0x8c72b0fc, 0x160b94f6, 0x450e4d3d, 0x7a320e85,
+  0xbef8f0e1, 0x21d73653, 0x4e3d977a, 0x1e7b3929,
+  0x1cc6c719, 0xbe478d53, 0x8d752809, 0xe6d8c2c6,
+  0x275f0892, 0xc8acc273, 0x4cc21580, 0xecc4a617,
+  0xf5f7be70, 0xe795248a, 0x375a2fe9, 0x425570b6,
+  0x8898dcf8, 0xdc2d97c4, 0x0106114b, 0x364dc22f,
+  0x1e0cad1f, 0xbe63803c, 0x5f69fac2, 0x4d5afa6f,
+  0x1bc0dfb5, 0xfb273589, 0x0ea47f7b, 0x3c1c2b50,
+  0x21b2a932, 0x6b1223fd, 0x2fe706a8, 0xf9bd6ce2,
+  0xa268e64e, 0xe987f486, 0x3eacf563, 0x1ca2018c,
+  0x65e18228, 0x2207360a, 0x57cf1715, 0x34c37d2b,
+  0x1f8f3cde, 0x93b657cf, 0x31a019fd, 0xe69eb729,
+  0x8bca7b9b, 0x4c9d5bed, 0x277ebeaf, 0xe0d8f8ae,
+  0xd150821c, 0x31381871, 0xafc3f1b0, 0x927db328,
+  0xe95effac, 0x305a47bd, 0x426ba35b, 0x1233af3f,
+  0x686a5b83, 0x50e072e5, 0xd9d3bb2a, 0x8befc475,
+  0x487f0de6, 0xc88dff89, 0xbd664d5e, 0x971b5d18,
+  0x63b14847, 0xd7d3c1ce, 0x7f583cf3, 0x72cbcb09,
+  0xc0d0a81c, 0x7fa3429b, 0xe9158a1b, 0x225ea19a,
+  0xd8ca9ea3, 0xc763b282, 0xbb0c6341, 0x020b8293,
+  0xd4cd299d, 0x58cfa7f8, 0x91b4ee53, 0x37e4d140,
+  0x95ec764c, 0x30f76b06, 0x5ee68d24, 0x679c8661,
+  0xa41979c2, 0xf2b61284, 0x4fac1475, 0x0adb49f9,
+  0x19727a23, 0x15a7e374, 0xc43a18d5, 0x3fb1aa73,
+  0x342fc615, 0x924c0793, 0xbee2d7f0, 0x8a279de9,
+  0x4aa2d70c, 0xe24dd37f, 0xbe862c0b, 0x177c22c2,
+  0x5388e5ee, 0xcd8a7510, 0xf901b4fd, 0xdbc13dbc,
+  0x6c0bae5b, 0x64efe8c7, 0x48b02079, 0x80331a49,
+  0xca3d8ae6, 0xf3546190, 0xfed7108b, 0xc49b941b,
+  0x32baf4a9, 0xeb833a4a, 0x88a3f1a5, 0x3a91ce0a,
+  0x3cc27da1, 0x7112e684, 0x4a3096b1, 0x3794574c,
+  0xa3c8b6f3, 0x1d213941, 0x6e0a2e00, 0x233479f1,
+  0x0f4cd82f, 0x6093edd2, 0x5d7d209e, 0x464fe319,
+  0xd4dcac9e, 0x0db845cb, 0xfb5e4bc3, 0xe0256ce1,
+  0x09fb4ed1, 0x0914be1e, 0xa5bdb2c3, 0xc6eb57bb,
+  0x30320350, 0x3f397e91, 0xa67791bc, 0x86bc0e2c,
+  0xefa0a7e2, 0xe9ff7543, 0xe733612c, 0xd185897b,
+  0x329e5388, 0x91dd236b, 0x2ecb0d93, 0xf4d82a3d,
+  0x35b5c03f, 0xe4e606f0, 0x05b21843, 0x37b45964,
+  0x5eff22f4, 0x6027f4cc, 0x77178b3c, 0xae507131,
+  0x7bf7cabc, 0xf9c18d66, 0x593ade65, 0xd95ddf11,
+};
+
+const size_t buzhash_width = 4;
+
+uint32_t
+buzhash (const char *s)
+{
+  uint32_t h = 0;
+  size_t i;
+
+  for (i = 1; i < buzhash_width; i++, s++)
+    h ^= rol32 (buzhash_table[(size_t) (*s)], buzhash_width - i);
+  h ^= buzhash_table[(size_t) (*s)];
+  return h;
+}
+
+uint32_t
+buzhash_update (const char *s, uint32_t h)
+{
+  return rol32 (h, 1) ^ rol32 (buzhash_table[(size_t) s[0]], buzhash_width) ^ buzhash_table[(size_t) s[buzhash_width]];
+}

diff --git a/src/buzhash/buzhash.h b/src/buzhash/buzhash.h
new file mode 100644 (file)
index 0000000..f83aebd
--- /dev/null
+++ b/src/buzhash/buzhash.h
@@ -0,0 +1,13 @@
+#ifndef URLBLOCK_BUZHASH_H
+#define URLBLOCK_BUZHASH_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+extern const size_t buzhash_width;
+
+uint32_t buzhash (const char *);
+uint32_t buzhash_update (const char *, uint32_t);
+
+#endif

diff --git a/src/meson.build b/src/meson.build
index 629b1289f7698056514ca9631a6c43813aa11065..a4c2424c6451269d40785b8213c10d75697161fe 100644 (file)
--- a/src/meson.build
+++ b/src/meson.build
@@ -1,7 +1,7 @@
 add_global_arguments('-Wunused-result', language : 'c')
 add_global_arguments('-std=gnu99', language : 'c')
 subdir('lib')
-executable('zck', ['zck.c'], include_directories: inc, link_with: zcklib, install: true)
+executable('zck', ['zck.c', 'buzhash/buzhash.c'], include_directories: inc, link_with: zcklib, install: true)
 executable('unzck', ['unzck.c'], include_directories: inc, link_with: zcklib, install: true)
 executable('zckdl', ['zck_dl.c'], include_directories: inc, link_with: zcklib, install: true)
 executable('zck_read_header', ['zck_read_header.c'], include_directories: inc, link_with: zcklib, install: true)