msg 1.12.10
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00001 /* 00002 * This file is part of the Sofia-SIP package 00003 * 00004 * Copyright (C) 2005 Nokia Corporation. 00005 * 00006 * Contact: Pekka Pessi <pekka.pessi@nokia-email.address.hidden> 00007 * 00008 * This library is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public License 00010 * as published by the Free Software Foundation; either version 2.1 of 00011 * the License, or (at your option) any later version. 00012 * 00013 * This library is distributed in the hope that it will be useful, but 00014 * WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with this library; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 00021 * 02110-1301 USA 00022 * 00023 */ 00024 00025 #ifndef MSG_MCLASS_HASH_H 00026 00027 #define MSG_MCLASS_HASH_H 00028 00040 #include <sofia-sip/su_config.h> 00041 00042 #ifndef BNF_H 00043 #include <sofia-sip/bnf.h> 00044 #endif 00045 00046 SOFIA_BEGIN_DECLS 00047 00049 #define MC_HASH(s, n) (msg_header_name_hash(s, NULL) % (unsigned)(n)) 00050 00052 su_inline 00053 unsigned short msg_header_name_hash(char const *s, isize_t *llen) 00054 { 00055 unsigned short hash = 0; 00056 size_t i; 00057 00058 for (i = 0; s[i]; i++) { 00059 unsigned char c = s[i]; 00060 if (!(_bnf_table[c] & bnf_token)) 00061 break; 00062 if (c >= 'A' && c <= 'Z') 00063 hash += (c + 'a' - 'A'); 00064 else 00065 hash += c; 00066 hash *= 38501U; 00067 } 00068 00069 if (llen) 00070 *llen = i; 00071 00072 return hash; 00073 } 00074 00075 SOFIA_END_DECLS 00076 00077 #endif