epan/range.h

   1 /* range.h
   2  * Range routines
   3  *
   4  * $Id$
   5  *
   6  * Dick Gooris <gooris@lucent.com>
   7  * Ulf Lamping <ulf.lamping@web.de>
   8  *
   9  * Wireshark - Network traffic analyzer
  10  * By Gerald Combs <gerald@wireshark.org>
  11  * Copyright 1998 Gerald Combs
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #ifndef __RANGE_H__
  29 #define __RANGE_H__
  30
  31 #include <glib.h>
  32 #include "ws_symbol_export.h"
  33
  34 /** @file
  35  * Range strings a variant of value_strings
  36  */
  37
  38 /**@todo where's the best place for these? */
  39 #define MAX_SCTP_PORT 65535
  40 #define MAX_TCP_PORT 65535
  41 #define MAX_UDP_PORT 65535
  42 #define MAX_DCCP_PORT 65535
  43
  44 typedef struct range_admin_tag {
  45     guint32 low;
  46     guint32 high;
  47 } range_admin_t;
  48
  49 /** user specified range(s) */
  50 typedef struct range {
  51     guint           nranges;   /**< number of entries in ranges */
  52     range_admin_t   ranges[1]; /**< variable-length array */
  53 } range_t;
  54
  55 /**
  56  * Return value from range_convert_str().
  57  */
  58 typedef enum {
  59     CVT_NO_ERROR,
  60     CVT_SYNTAX_ERROR,
  61     CVT_NUMBER_TOO_BIG
  62 } convert_ret_t;
  63
  64 WS_DLL_PUBLIC range_t *range_empty(void);
  65
  66
  67 /*** Converts a range string to a fast comparable array of ranges.
  68  * This function allocates a range_t large enough to hold the number
  69  * of ranges specified, and fills the array range->ranges containing
  70  * low and high values with the number of ranges being range->nranges.
  71  * After having called this function, the function value_is_in_range()
  72  * determines whether a given number is within the range or not.<BR>
  73  * In case of a single number, we make a range where low is equal to high.
  74  * We take care on wrongly entered ranges; opposite order will be taken
  75  * care of.
  76  *
  77  * The following syntax is accepted :
  78  *
  79  *   1-20,30-40     Range from 1 to 20, and packets 30 to 40
  80  *   -20,30         Range from 1 to 20, and packet 30
  81  *   20,30,40-      20, 30, and the range from 40 to the end
  82  *   20-10,30-25    Range from 10 to 20, and from 25 to 30
  83  *   -              All values
  84  * @param range the range
  85  * @param es points to the string to be converted.
  86  * @param max_value specifies the maximum value in a range.
  87  * @return convert_ret_t
  88  */
  89 WS_DLL_PUBLIC convert_ret_t range_convert_str(range_t **range, const gchar *es,
  90     guint32 max_value);
  91
  92 convert_ret_t range_convert_str_work(range_t **range, const gchar *es,
  93     guint32 max_value, gboolean err_on_max);
  94
  95 /** This function returns TRUE if a given value is within one of the ranges
  96  * stored in the ranges array.
  97  * @param range the range
  98  * @param val the value to check
  99  * @return TRUE if the value is in range
 100  */
 101 WS_DLL_PUBLIC gboolean value_is_in_range(range_t *range, guint32 val);
 102
 103 /** This function returns TRUE if the two given range_t's are equal.
 104  * @param a first range
 105  * @param b second range
 106  * @return TRUE if the value is in range
 107  */
 108 WS_DLL_PUBLIC gboolean ranges_are_equal(range_t *a, range_t *b);
 109
 110 /** This function calls the provided callback function for each value in
 111  * in the range.
 112  * @param range the range
 113  * @param callback the callback function
 114  */
 115 WS_DLL_PUBLIC void range_foreach(range_t *range, void (*callback)(guint32 val));
 116
 117 /**
 118  * This function converts a range_t to a (ep_alloc()-allocated) string.
 119  */
 120 WS_DLL_PUBLIC char *range_convert_range(range_t *range);
 121
 122 /**
 123  * Create a copy of a range.
 124  * @param src the range to copy
 125  * @return ep allocated copy of the range
 126  */
 127 WS_DLL_PUBLIC range_t *range_copy(range_t *src);
 128
 129 #endif /* __RANGE_H__ */