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authorKyle McMartin <kyle@debian.org>2004-06-06 01:23:28 +0200
committerKyle McMartin <kyle@debian.org>2004-06-06 01:23:28 +0200
commit194c0bbde98196ce6871bd21a9e3d52a771f8dfd (patch)
treef77af65ebcb4c1fa9d33dce45d206407a98c646d /intl/hash-string.h
Import madplay_0.15.2b.orig.tar.gz
[dgit import orig madplay_0.15.2b.orig.tar.gz]
Diffstat (limited to 'intl/hash-string.h')
-rw-r--r--intl/hash-string.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/intl/hash-string.h b/intl/hash-string.h
new file mode 100644
index 0000000..093e3b1
--- /dev/null
+++ b/intl/hash-string.h
@@ -0,0 +1,48 @@
+/* Description of GNU message catalog format: string hashing function.
+ Copyright (C) 1995, 1997-1998, 2000-2003 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Library General Public License as published
+ by the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ USA. */
+
+/* @@ end of prolog @@ */
+
+/* We assume to have `unsigned long int' value with at least 32 bits. */
+#define HASHWORDBITS 32
+
+
+/* Defines the so called `hashpjw' function by P.J. Weinberger
+ [see Aho/Sethi/Ullman, COMPILERS: Principles, Techniques and Tools,
+ 1986, 1987 Bell Telephone Laboratories, Inc.] */
+static inline unsigned long int
+hash_string (const char *str_param)
+{
+ unsigned long int hval, g;
+ const char *str = str_param;
+
+ /* Compute the hash value for the given string. */
+ hval = 0;
+ while (*str != '\0')
+ {
+ hval <<= 4;
+ hval += (unsigned char) *str++;
+ g = hval & ((unsigned long int) 0xf << (HASHWORDBITS - 4));
+ if (g != 0)
+ {
+ hval ^= g >> (HASHWORDBITS - 8);
+ hval ^= g;
+ }
+ }
+ return hval;
+}