122 lines
2.4 KiB
C
122 lines
2.4 KiB
C
/*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include "syntax-tree.h"
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#include "sttype-set.h"
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#include <wsutil/ws_assert.h>
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/*
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* The GSList stores a list of elements of the set. Each element is represented
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* by two list items: (lower, upper) in case of a value range or (value, NULL)
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* if the element is not a range value.
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*/
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static void
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slist_stnode_free(gpointer data)
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{
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if (data) {
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stnode_free((stnode_t *)data);
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}
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}
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void
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set_nodelist_free(GSList *params)
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{
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g_slist_free_full(params, slist_stnode_free);
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}
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static void
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sttype_set_free(gpointer value)
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{
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/* If the data was not claimed with stnode_steal_data(), free it. */
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if (value) {
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set_nodelist_free((GSList *)value);
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}
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}
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static char *
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sttype_set_tostr(const void *data)
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{
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GSList* nodelist = (GSList *)data;
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stnode_t *lower, *upper;
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GString *repr = g_string_new("");
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char *str;
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while (nodelist) {
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lower = nodelist->data;
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str = stnode_tostr(lower);
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g_string_append(repr, str);
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g_free(str);
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/* Set elements are always in pairs; upper may be null. */
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nodelist = g_slist_next(nodelist);
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ws_assert(nodelist);
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upper = nodelist->data;
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if (upper != NULL) {
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g_string_append(repr, "..");
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str = stnode_tostr(upper);
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g_string_append(repr, str);
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g_free(str);
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}
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nodelist = g_slist_next(nodelist);
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if (nodelist != NULL) {
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g_string_append_c(repr, ' ');
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}
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}
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return g_string_free(repr, FALSE);
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}
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void
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sttype_set_replace_element(stnode_t *node, stnode_t *oldnode, stnode_t *newnode)
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{
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GSList *nodelist = (GSList*)stnode_data(node);
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/* This deliberately checks both the left and right nodes, covering both
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* the lower and upper bound for ranges. NULL right nodes (in case of
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* normal, non-range elements) will usually not match "oldnode". */
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while (nodelist) {
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if (nodelist->data == oldnode) {
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nodelist->data = newnode;
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break;
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}
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nodelist = g_slist_next(nodelist);
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}
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}
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void
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sttype_register_set(void)
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{
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static sttype_t set_type = {
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STTYPE_SET,
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"SET",
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NULL,
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sttype_set_free,
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NULL,
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sttype_set_tostr
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};
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sttype_register(&set_type);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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