[hackers] [scc] [cc1] Change the hash algorithm used || Roberto E. Vargas Caballero

From: <git_AT_suckless.org>
Date: Sun, 19 Feb 2017 19:31:44 +0100 (CET)

commit 1befabeb9b77200abd0fa34f8ea6c3db58941604
Author: Roberto E. Vargas Caballero <k0ga_AT_shike2.com>
AuthorDate: Sun Feb 19 19:30:17 2017 +0100
Commit: Roberto E. Vargas Caballero <k0ga_AT_shike2.com>
CommitDate: Sun Feb 19 19:30:17 2017 +0100

    [cc1] Change the hash algorithm used
    
    This code pretended to be an implementation of djb2, but it has
    an error that converted it in an implementation of lose lose
    (http://www.cse.yorku.ca/~oz/hash.html)

diff --git a/cc1/symbol.c b/cc1/symbol.c
index 0053ba3..0d559bb 100644
--- a/cc1/symbol.c
+++ b/cc1/symbol.c
_AT_@ -51,14 +51,13 @@ dumpstab(Symbol **tbl, char *msg)
 #endif
 
 static Symbol **
-hash(const char *s, int ns)
+hash(char *s, int ns)
 {
         unsigned c, h;
         Symbol **tab;
 
-
         for (h = 0; c = *s; ++s)
- h ^= 33 * c;
+ h ^= h*33 + c;
         h &= NR_SYM_HASH-1;
 
         tab = (ns == NS_CPP) ? htabcpp : htab;
Received on Sun Feb 19 2017 - 19:31:44 CET