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| author | Sam Varshavchik | 2013-08-19 16:39:41 -0400 | 
|---|---|---|
| committer | Sam Varshavchik | 2013-08-25 14:43:51 -0400 | 
| commit | 9c45d9ad13fdf439d44d7443ae75da15ea0223ed (patch) | |
| tree | 7a81a04cb51efb078ee350859a64be2ebc6b8813 /pcp/intl/hash-string.c | |
| parent | a9520698b770168d1f33d6301463bb70a19655ec (diff) | |
| download | courier-libs-9c45d9ad13fdf439d44d7443ae75da15ea0223ed.tar.bz2 | |
Initial checkin
Imported from subversion report, converted to git. Updated all paths in
scripts and makefiles, reflecting the new directory hierarchy.
Diffstat (limited to 'pcp/intl/hash-string.c')
| -rw-r--r-- | pcp/intl/hash-string.c | 50 | 
1 files changed, 50 insertions, 0 deletions
| diff --git a/pcp/intl/hash-string.c b/pcp/intl/hash-string.c new file mode 100644 index 0000000..00353f0 --- /dev/null +++ b/pcp/intl/hash-string.c @@ -0,0 +1,50 @@ +/* Implements a string hashing function. +   Copyright (C) 1995, 1997, 1998, 2000, 2003 Free Software Foundation, Inc. +   This file is part of the GNU C Library. + +   The GNU C Library is free software; you can redistribute it and/or +   modify it under the terms of the GNU Lesser General Public +   License as published by the Free Software Foundation; either +   version 2.1 of the License, or (at your option) any later version. + +   The GNU C Library 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 +   Lesser General Public License for more details. + +   You should have received a copy of the GNU Lesser General Public +   License along with the GNU C Library; if not, see +   <http://www.gnu.org/licenses/>.  */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +/* Specification.  */ +#include "hash-string.h" + + +/* 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.]  */ +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; +} | 
