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/* stats_tree_priv.h
 * implementor's API for stats_tree
 * 2005, Luis E. G. Ontanon
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef __STATS_TREE_PRIV_H
#define  __STATS_TREE_PRIV_H

#include "stats_tree.h"
#include "ws_symbol_export.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define INDENT_MAX 32
#define NUM_BUF_SIZE 32

/** implementations should define this to contain its own node related data
 * as well as some operations on it */
typedef struct _st_node_pres st_node_pres;

/** implementations should define this to contain its own dynamic tree related data
* as well as some operations on it */
typedef struct _tree_pres tree_pres;

/** implementations should define this to contain its own static tree related data
* as well as some operations on it */
typedef struct _tree_cfg_pres tree_cfg_pres;


typedef struct _stat_node stat_node;
typedef struct _stats_tree_cfg stats_tree_cfg;

typedef struct _range_pair {
        gint floor;
        gint ceil;
} range_pair_t;

typedef struct _burst_bucket burst_bucket;
struct _burst_bucket {
        burst_bucket    *next;
        burst_bucket    *prev;
        gint                    count;
        double                  bucket_no;
        double                  start_time;
};

struct _stat_node {
        gchar*                  name;
        int                     id;

        /** the counter it keeps */
        gint                    counter;
        /** total of all values submitted - for computing averages */
        gint64                  total;
        gint                    minvalue;
        gint                    maxvalue;
        int                             st_flags;

        /** fields for burst rate calculation */
        gint                    bcount;
        burst_bucket    *bh, *bt;
        gint                    max_burst;
        double                  burst_time;

        /** children nodes by name */
        GHashTable              *hash;

        /** the owner of this node */
        stats_tree              *st;

        /** relatives */
        stat_node               *parent;
        stat_node               *children;
        stat_node               *next;

        /** used to check if value is within range */
        range_pair_t            *rng;

        /** node presentation data */
        st_node_pres            *pr;
};

struct _stats_tree {
        /** the "class" from which it's derived */
        stats_tree_cfg          *cfg;

        char                    *filter;

        /* times */
        double                  start;
        double                  elapsed;
        double                  now;

        int                             st_flags;
        gint                    num_columns;
        gchar                   *display_name;

   /** used to lookup named parents:
        *    key: parent node name
        *  value: parent node
        */
        GHashTable              *names;

   /** used for quicker lookups of parent nodes */
        GPtrArray               *parents;

        /**
         *  tree representation
         *      to be defined (if needed) by the implementations
         */
        tree_pres               *pr;

        /** every tree in nature has one */
        stat_node               root;
};

struct _stats_tree_cfg {
        gchar*                  abbr;
        gchar*                  name;
        gchar*                  tapname;
        register_stat_group_t   stat_group;

        gboolean in_use; /* GTK+ only */
        gboolean plugin;

        /** dissector defined callbacks */
        stat_tree_packet_cb packet;
        stat_tree_init_cb init;
        stat_tree_cleanup_cb cleanup;

        /** tap listener flags for the per-packet callback */
        guint flags;

        /*
         * node presentation callbacks
         */

        /** last to be called at node creation */
        void (*setup_node_pr)(stat_node*);

        /**
         * tree presentation callbacks
         */
        tree_cfg_pres *pr;


        tree_pres *(*new_tree_pr)(stats_tree*);
        void (*free_tree_pr)(stats_tree*);

        /** flags for the stats tree (sorting etc.) default values to new trees */
        guint st_flags;
};

/* guess what, this is it! */
WS_DLL_PUBLIC void stats_tree_presentation(void (*registry_iterator)(gpointer,gpointer,gpointer),
                                    void (*setup_node_pr)(stat_node*),
                                    void (*free_tree_pr)(stats_tree*),
                                    void *data);

WS_DLL_PUBLIC stats_tree *stats_tree_new(stats_tree_cfg *cfg, tree_pres *pr, const char *filter);

/** callback for taps */
WS_DLL_PUBLIC int  stats_tree_packet(void*, packet_info*, epan_dissect_t*, const void *);

/** callback for reset */
WS_DLL_PUBLIC void stats_tree_reset(void *p_st);

/** callback for clear */
WS_DLL_PUBLIC void stats_tree_reinit(void *p_st);

/* callback for destoy */
WS_DLL_PUBLIC void stats_tree_free(stats_tree *st);

/** given an optarg splits the abbr part
   and returns a newly allocated buffer containing it */
WS_DLL_PUBLIC gchar *stats_tree_get_abbr(const gchar *optarg);

/** obtains a stats tree from the registry given its abbr */
WS_DLL_PUBLIC stats_tree_cfg *stats_tree_get_cfg_by_abbr(const char *abbr);

/** obtains a stats tree list from the registry
    caller should free returned list with  g_list_free() */
WS_DLL_PUBLIC GList *stats_tree_get_cfg_list(void);

/** used to calcuate the size of the indentation and the longest string */
WS_DLL_PUBLIC guint stats_tree_branch_max_namelen(const stat_node *node, guint indent);

/** a text representation of a node,
   if buffer is NULL returns a newly allocated string */
WS_DLL_PUBLIC gchar *stats_tree_node_to_str(const stat_node *node,
                                        gchar *buffer, guint len);

/** get the display name for the stats_tree (or node name) based on the
    st_sort_showfullname preference. If not set remove everything before
    last unescaped backslash. Caller must free the result */
WS_DLL_PUBLIC gchar* stats_tree_get_displayname (gchar* fullname);

/** returns the column number of the default column to sort on */
WS_DLL_PUBLIC gint stats_tree_get_default_sort_col (stats_tree *st);

/** returns the default sort order to use */
WS_DLL_PUBLIC gboolean stats_tree_is_default_sort_DESC (stats_tree *st);

/** returns the column name for a given column index */
WS_DLL_PUBLIC const gchar* stats_tree_get_column_name (gint col_index);

/** returns the maximum number of characters in the value of a column */
WS_DLL_PUBLIC gint stats_tree_get_column_size (gint col_index);

/** returns the formatted column values for the current node
  as array of gchar*. Caller must free entries and free array */
WS_DLL_PUBLIC gchar** stats_tree_get_values_from_node (const stat_node* node);

/** function to compare two nodes for sort, based on sort_column. */
WS_DLL_PUBLIC gint stats_tree_sort_compare (const stat_node *a,
                                        const stat_node *b,
                                        gint sort_column,
                                        gboolean sort_descending);

/** wrapper for stats_tree_sort_compare() function that can be called from array sort. */
WS_DLL_PUBLIC gint stat_node_array_sortcmp (gconstpointer a,
                                        gconstpointer b,
                                        gpointer user_data);

/** function to copy stats_tree into GString. format deternmines output format */
WS_DLL_PUBLIC GString* stats_tree_format_as_str(const stats_tree* st,
                                        st_format_type format_type,
                                        gint sort_column,
                                        gboolean sort_descending);

/** helper funcation to add note to formatted stats_tree */
WS_DLL_PUBLIC void stats_tree_format_node_as_str(const stat_node *node,
                                        GString *s,
                                        st_format_type format_type,
                                        guint indent,
                                        const gchar *path,
                                        gint maxnamelen,
                                        gint sort_column,
                                        gboolean sort_descending);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __STATS_TREE_PRIV_H */