epan/asm_utils.c

   1 /* asm_utils.c
   2  * Functions optionally implemented in assembler
   3  *
   4  * $Id$
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #include <string.h>
  28 #include <ctype.h>
  29 #include <glib.h>
  30
  31 #include "asm_utils.h"
  32
  33 /* String comparison func for dfilter_token GTree */
  34 gint
  35 wrs_strcmp(gconstpointer a, gconstpointer b)
  36 {
  37     return strcmp((const char*)a, (const char*)b);
  38 }
  39
  40 gint
  41 wrs_strcmp_with_data(gconstpointer a, gconstpointer b, gpointer user_data _U_)
  42 {
  43     return strcmp((const char*)a, (const char*)b);
  44 }
  45
  46 gboolean
  47 wrs_str_equal(gconstpointer a, gconstpointer b)
  48 {
  49     return !strcmp((const char*)a, (const char*)b);
  50 }
  51
  52 guchar
  53 wrs_check_charset(const guchar table[256], const char *str)
  54 {
  55     const char *p = str;
  56     guchar c;
  57
  58     do {
  59       c = *(p++);
  60     } while (table[c]);
  61     return c;
  62 }
  63
  64 guint
  65 wrs_str_hash(gconstpointer v)
  66 {
  67   /* 31 bit hash function */
  68   const signed char *p = (const signed char *)v;
  69   guint32 h = *p;
  70   if (h)
  71     for (p += 1; *p != '\0'; p++)
  72       h = (h << 5) - h + *p;
  73   return h;
  74 }
  75