1 /* drange.c
2 * Routines for providing general range support to the dfilter library
3 *
4 * Copyright (c) 2000 by Ed Warnicke <hagbard@physics.rutgers.edu>
5 *
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs
8 * Copyright 1999 Gerald Combs
9 * SPDX-License-Identifier: GPL-2.0-or-later
10 */
11
12 #include "config.h"
13
14 #include "drange.h"
15 #include <wsutil/ws_assert.h>
16
17 /* drange_node constructor */
18 drange_node*
drange_node_new(void)19 drange_node_new(void)
20 {
21 drange_node* new_range_node;
22
23 new_range_node = g_new(drange_node,1);
24 new_range_node->start_offset = 0;
25 new_range_node->length = 0;
26 new_range_node->end_offset = 0;
27 new_range_node->ending = DRANGE_NODE_END_T_UNINITIALIZED;
28 return new_range_node;
29 }
30
31 static drange_node*
drange_node_dup(drange_node * org)32 drange_node_dup(drange_node *org)
33 {
34 drange_node *new_range_node;
35
36 if (!org)
37 return NULL;
38
39 new_range_node = g_new(drange_node,1);
40 new_range_node->start_offset = org->start_offset;
41 new_range_node->length = org->length;
42 new_range_node->end_offset = org->end_offset;
43 new_range_node->ending = org->ending;
44 return new_range_node;
45 }
46
47 /* drange_node destructor */
48 void
drange_node_free(drange_node * drnode)49 drange_node_free(drange_node* drnode)
50 {
51 g_free(drnode);
52 }
53
54 /* drange_node accessors */
55 gint
drange_node_get_start_offset(drange_node * drnode)56 drange_node_get_start_offset(drange_node* drnode)
57 {
58 ws_assert(drnode->ending != DRANGE_NODE_END_T_UNINITIALIZED);
59 return drnode->start_offset;
60 }
61
62 gint
drange_node_get_length(drange_node * drnode)63 drange_node_get_length(drange_node* drnode)
64 {
65 ws_assert(drnode->ending == DRANGE_NODE_END_T_LENGTH);
66 return drnode->length;
67 }
68
69 gint
drange_node_get_end_offset(drange_node * drnode)70 drange_node_get_end_offset(drange_node* drnode)
71 {
72 ws_assert(drnode->ending == DRANGE_NODE_END_T_OFFSET);
73 return drnode->end_offset;
74 }
75
76 drange_node_end_t
drange_node_get_ending(drange_node * drnode)77 drange_node_get_ending(drange_node* drnode)
78 {
79 ws_assert(drnode->ending != DRANGE_NODE_END_T_UNINITIALIZED);
80 return drnode->ending;
81 }
82
83 /* drange_node mutators */
84 void
drange_node_set_start_offset(drange_node * drnode,gint offset)85 drange_node_set_start_offset(drange_node* drnode, gint offset)
86 {
87 drnode->start_offset = offset;
88 }
89
90 void
drange_node_set_length(drange_node * drnode,gint length)91 drange_node_set_length(drange_node* drnode, gint length)
92 {
93 drnode->length = length;
94 drnode->ending = DRANGE_NODE_END_T_LENGTH;
95 }
96
97 void
drange_node_set_end_offset(drange_node * drnode,gint offset)98 drange_node_set_end_offset(drange_node* drnode, gint offset)
99 {
100 drnode->end_offset = offset;
101 drnode->ending = DRANGE_NODE_END_T_OFFSET;
102 }
103
104
105 void
drange_node_set_to_the_end(drange_node * drnode)106 drange_node_set_to_the_end(drange_node* drnode)
107 {
108 drnode->ending = DRANGE_NODE_END_T_TO_THE_END;
109 }
110
111 /* drange constructor */
112 drange_t *
drange_new(void)113 drange_new(void)
114 {
115 drange_t * new_drange;
116 new_drange = g_new(drange_t,1);
117 new_drange->range_list = NULL;
118 new_drange->has_total_length = TRUE;
119 new_drange->total_length = 0;
120 new_drange->min_start_offset = G_MAXINT;
121 new_drange->max_start_offset = G_MININT;
122 return new_drange;
123 }
124
125 static void
drange_append_wrapper(gpointer data,gpointer user_data)126 drange_append_wrapper(gpointer data, gpointer user_data)
127 {
128 drange_node *drnode = (drange_node *)data;
129 drange_t *dr = (drange_t *)user_data;
130
131 drange_append_drange_node(dr, drnode);
132 }
133
134 drange_t *
drange_new_from_list(GSList * list)135 drange_new_from_list(GSList *list)
136 {
137 drange_t *new_drange;
138
139 new_drange = drange_new();
140 g_slist_foreach(list, drange_append_wrapper, new_drange);
141 return new_drange;
142 }
143
144 drange_t *
drange_dup(drange_t * org)145 drange_dup(drange_t *org)
146 {
147 drange_t *new_drange;
148 GSList *p;
149
150 if (!org)
151 return NULL;
152
153 new_drange = drange_new();
154 for (p = org->range_list; p; p = p->next) {
155 drange_node *drnode = (drange_node *)p->data;
156 drange_append_drange_node(new_drange, drange_node_dup(drnode));
157 }
158 return new_drange;
159 }
160
161
162 /* drange destructor */
163 void
drange_free(drange_t * dr)164 drange_free(drange_t * dr)
165 {
166 drange_node_free_list(dr->range_list);
167 g_free(dr);
168 }
169
170 /* Call drange_node destructor on all list items */
171 void
drange_node_free_list(GSList * list)172 drange_node_free_list(GSList* list)
173 {
174 g_slist_free_full(list, g_free);
175 }
176
177 /* drange accessors */
drange_has_total_length(drange_t * dr)178 gboolean drange_has_total_length(drange_t * dr) { return dr->has_total_length; }
drange_get_total_length(drange_t * dr)179 gint drange_get_total_length(drange_t * dr) { return dr->total_length; }
drange_get_min_start_offset(drange_t * dr)180 gint drange_get_min_start_offset(drange_t * dr) { return dr->min_start_offset; }
drange_get_max_start_offset(drange_t * dr)181 gint drange_get_max_start_offset(drange_t * dr) { return dr->max_start_offset; }
182
183 static void
update_drange_with_node(drange_t * dr,drange_node * drnode)184 update_drange_with_node(drange_t *dr, drange_node *drnode)
185 {
186 if(drnode->ending == DRANGE_NODE_END_T_TO_THE_END){
187 dr->has_total_length = FALSE;
188 }
189 else if(dr->has_total_length){
190 dr->total_length += drnode->length;
191 }
192 if(drnode->start_offset < dr->min_start_offset){
193 dr->min_start_offset = drnode->start_offset;
194 }
195 if(drnode->start_offset > dr->max_start_offset){
196 dr->max_start_offset = drnode->start_offset;
197 }
198 }
199
200 /* drange mutators */
201 void
drange_prepend_drange_node(drange_t * dr,drange_node * drnode)202 drange_prepend_drange_node(drange_t * dr, drange_node* drnode)
203 {
204 if(drnode != NULL){
205 dr->range_list = g_slist_prepend(dr->range_list,drnode);
206 update_drange_with_node(dr, drnode);
207 }
208 }
209
210 void
drange_append_drange_node(drange_t * dr,drange_node * drnode)211 drange_append_drange_node(drange_t * dr, drange_node* drnode)
212 {
213 if(drnode != NULL){
214 dr->range_list = g_slist_append(dr->range_list,drnode);
215 update_drange_with_node(dr, drnode);
216 }
217 }
218
219 void
drange_foreach_drange_node(drange_t * dr,GFunc func,gpointer funcdata)220 drange_foreach_drange_node(drange_t * dr, GFunc func, gpointer funcdata)
221 {
222 g_slist_foreach(dr->range_list,func,funcdata);
223 }
224
225 static void
_sprint_drange_node(GString * repr,drange_node * rn)226 _sprint_drange_node(GString *repr, drange_node *rn)
227 {
228 if (rn->ending == DRANGE_NODE_END_T_TO_THE_END)
229 g_string_append_printf(repr, "%d:",
230 rn->start_offset);
231 else if(rn->ending == DRANGE_NODE_END_T_OFFSET)
232 g_string_append_printf(repr, "%d-%d",
233 rn->start_offset, rn->end_offset);
234 else if (rn->ending == DRANGE_NODE_END_T_LENGTH)
235 g_string_append_printf(repr, "%d:%d",
236 rn->start_offset, rn->length);
237 else
238 g_string_append_printf(repr, "%d/%d/%d/U",
239 rn->start_offset, rn->length, rn->end_offset);
240 }
241
242 char *
drange_tostr(drange_t * dr)243 drange_tostr(drange_t *dr)
244 {
245 GString *repr = g_string_new("");
246 GSList *range_list = dr->range_list;
247
248 while (range_list) {
249 _sprint_drange_node(repr, (drange_node *)(range_list->data));
250 range_list = g_slist_next(range_list);
251 if (range_list != NULL) {
252 g_string_append_c(repr, ',');
253 }
254 }
255
256 return g_string_free(repr, FALSE);
257 }
258
259 /*
260 * Editor modelines - https://www.wireshark.org/tools/modelines.html
261 *
262 * Local variables:
263 * c-basic-offset: 4
264 * tab-width: 8
265 * indent-tabs-mode: nil
266 * End:
267 *
268 * vi: set shiftwidth=4 tabstop=8 expandtab:
269 * :indentSize=4:tabSize=8:noTabs=true:
270 */
271