diff options
author | Fumitoshi UKAI <ukai@debian.or.jp> | 2003-09-23 18:42:24 +0000 |
---|---|---|
committer | Fumitoshi UKAI <ukai@debian.or.jp> | 2003-09-23 18:42:24 +0000 |
commit | 2b74f5b7671e2cb7d4d71d8e5167c5965a1784e9 (patch) | |
tree | 88417f5fec14aa97d75dba5f712078ad5d5e66bf /intl/hash-string.h | |
parent | cd in subdir (diff) | |
download | w3m-2b74f5b7671e2cb7d4d71d8e5167c5965a1784e9.tar.gz w3m-2b74f5b7671e2cb7d4d71d8e5167c5965a1784e9.zip |
gettextize initial modifications
Diffstat (limited to 'intl/hash-string.h')
-rw-r--r-- | intl/hash-string.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/intl/hash-string.h b/intl/hash-string.h new file mode 100644 index 0000000..b267a87 --- /dev/null +++ b/intl/hash-string.h @@ -0,0 +1,59 @@ +/* Description of GNU message catalog format: string hashing function. + Copyright (C) 1995, 1997, 1998, 2000, 2001 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 @@ */ + +#ifndef PARAMS +# if __STDC__ || defined __GNUC__ || defined __SUNPRO_C || defined __cplusplus || __PROTOTYPES +# define PARAMS(Args) Args +# else +# define PARAMS(Args) () +# endif +#endif + +/* 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 unsigned long int hash_string PARAMS ((const char *__str_param)); + +static inline unsigned long int +hash_string (str_param) + 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 long int) *str++; + g = hval & ((unsigned long int) 0xf << (HASHWORDBITS - 4)); + if (g != 0) + { + hval ^= g >> (HASHWORDBITS - 8); + hval ^= g; + } + } + return hval; +} |