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* path.cc (hash_path_name): Improve hash function strength.

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This commit is contained in:
Corinna Vinschen 2002-05-02 16:46:12 +00:00
parent 6396bad848
commit d055ecb08f
2 changed files with 6 additions and 3 deletions
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4
winsup/cygwin/ChangeLog
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@ -1,3 +1,7 @@
2002-04-30 Eric Blake <ebb9@email.byu.edu>
* path.cc (hash_path_name): Improve hash function strength.
2002-05-02 Robert Collins <rbtcollins@hotmail.com> 2002-05-02 Robert Collins <rbtcollins@hotmail.com>
* thread.cc (__pthread_cond_dowait): Fix a race on signalling from a * thread.cc (__pthread_cond_dowait): Fix a race on signalling from a

5
winsup/cygwin/path.cc
View File

@ -3182,7 +3182,7 @@ hash_path_name (unsigned long hash, const char *name)
hash = cygheap->cwd.get_hash (); hash = cygheap->cwd.get_hash ();
if (name[0] == '.' && name[1] == '\0') if (name[0] == '.' && name[1] == '\0')
return hash; return hash;
hash += hash_path_name (hash, "\\"); hash = (hash << 5) - hash + '\\';
} }
} }
@ -3192,8 +3192,7 @@ hashit:
do do
{ {
int ch = cyg_tolower(*name); int ch = cyg_tolower(*name);
hash += ch + (ch << 17); hash = (hash << 5) - hash + ch;
hash ^= hash >> 2;
} }
while (*++name != '\0' && while (*++name != '\0' &&
!(*name == '\\' && (!name[1] || (name[1] == '.' && !name[2])))); !(*name == '\\' && (!name[1] || (name[1] == '.' && !name[2]))));