### Bug Summary

File: | epan/dfilter/syntax-tree.c
Warning: | line 104, column 14 Value stored to 's' during its initialization is never read

### Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name syntax-tree.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-21/lib/clang/21 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -I /builds/wireshark/wireshark/epan/dfilter -I /builds/wireshark/wireshark/build/epan/dfilter -I /builds/wireshark/wireshark/epan -I /builds/wireshark/wireshark/tools/lemon -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2026-01-04-100338-3604-1 -x c /builds/wireshark/wireshark/epan/dfilter/syntax-tree.c

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1 | /*
2 | * Wireshark - Network traffic analyzer
3 | * By Gerald Combs <gerald@wireshark.org>
4 | * Copyright 2001 Gerald Combs
5 | *
6 | * SPDX-License-Identifier: GPL-2.0-or-later
7 | */
8 |
9 | #include "config.h"
10 |
11 | #define WS_LOG_DOMAIN"DFilter" LOG_DOMAIN_DFILTER"DFilter"
12 |
13 | #include "syntax-tree.h"
14 | #include <wsutil/wmem/wmem.h>
15 | #include <wsutil/str_util.h>
16 | #include <wsutil/glib-compat.h>
17 | #include "sttype-op.h"
18 | #include "sttype-function.h"
19 | #include "dfilter-int.h"
20 |
21 | /* Keep track of sttype_t's via their sttype_id_t number */
22 | static sttype_t* type_list[STTYPE_NUM_TYPES];
23 |
24 |
25 | void
26 | sttype_init(void)
27 | {
28 | sttype_register_field();
29 | sttype_register_function();
30 | sttype_register_number();
31 | sttype_register_pointer();
32 | sttype_register_set();
33 | sttype_register_slice();
34 | sttype_register_string();
35 | sttype_register_opers();
36 | }
37 |
38 | void
39 | sttype_cleanup(void)
40 | {
41 | /* nothing to do */
42 | }
43 |
44 |
45 | void
46 | sttype_register(sttype_t *type)
47 | {
48 | sttype_id_t type_id;
49 |
50 | type_id = type->id;
51 |
52 | /* Check input */
53 | ws_assert(type_id < STTYPE_NUM_TYPES)do { if ((1) && !(type_id < STTYPE_NUM_TYPES)) ws_log_fatal_full ("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 53 , __func__, "assertion failed: %s", "type_id < STTYPE_NUM_TYPES" ); } while (0);
54 |
55 | /* Don't re-register. */
56 | ws_assert(type_list[type_id] == NULL)do { if ((1) && !(type_list[type_id] == ((void*)0))) ws_log_fatal_full ("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 56 , __func__, "assertion failed: %s", "type_list[type_id] == ((void*)0)" ); } while (0);
57 |
58 | type_list[type_id] = type;
59 | }
60 |
61 | static sttype_t*
62 | sttype_lookup(sttype_id_t type_id)
63 | {
64 | sttype_t *result;
65 |
66 | /* Check input */
67 | ws_assert(type_id < STTYPE_NUM_TYPES)do { if ((1) && !(type_id < STTYPE_NUM_TYPES)) ws_log_fatal_full ("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 67 , __func__, "assertion failed: %s", "type_id < STTYPE_NUM_TYPES" ); } while (0);
68 |
69 | result = type_list[type_id];
70 |
71 | /* Check output. */
72 | ws_assert(result != NULL)do { if ((1) && !(result != ((void*)0))) ws_log_fatal_full ("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 72 , __func__, "assertion failed: %s", "result != ((void*)0)"); } while (0);
73 |
74 | return result;
75 | }
76 |
77 | const char *
78 | sttype_name(const sttype_id_t type)
79 | {
80 | switch (type) {
81 | case STTYPE_UNINITIALIZED: return "UNINITIALIZED";
82 | case STTYPE_TEST: return "TEST";
83 | case STTYPE_LITERAL: return "LITERAL";
84 | case STTYPE_UNPARSED: return "UNPARSED";
85 | case STTYPE_REFERENCE: return "REFERENCE";
86 | case STTYPE_STRING: return "STRING";
87 | case STTYPE_CHARCONST: return "CHARCONST";
88 | case STTYPE_NUMBER: return "NUMBER";
89 | case STTYPE_FIELD: return "FIELD";
90 | case STTYPE_FVALUE: return "FVALUE";
91 | case STTYPE_SLICE: return "SLICE";
92 | case STTYPE_FUNCTION: return "FUNCTION";
93 | case STTYPE_SET: return "SET";
94 | case STTYPE_PCRE: return "PCRE";
95 | case STTYPE_ARITHMETIC: return "ARITHMETIC";
96 | case STTYPE_NUM_TYPES: return "NUM_TYPES";
97 | }
98 | return "(unknown sttype)";
99 | }
100 |
101 | const char *
102 | stnode_op_name(const stnode_op_t op)
103 | {
104 | const char *s = "(null)";
| Value stored to 's' during its initialization is never read
105 |
106 | switch(op) {
107 | case STNODE_OP_NOT:
108 | s = "TEST_NOT";
109 | break;
110 | case STNODE_OP_AND:
111 | s = "TEST_AND";
112 | break;
113 | case STNODE_OP_OR:
114 | s = "TEST_OR";
115 | break;
116 | case STNODE_OP_ALL_EQ:
117 | s = "TEST_ALL_EQ";
118 | break;
119 | case STNODE_OP_ANY_EQ:
120 | s = "TEST_ANY_EQ";
121 | break;
122 | case STNODE_OP_ALL_NE:
123 | s = "TEST_ALL_NE";
124 | break;
125 | case STNODE_OP_ANY_NE:
126 | s = "TEST_ANY_NE";
127 | break;
128 | case STNODE_OP_GT:
129 | s = "TEST_GT";
130 | break;
131 | case STNODE_OP_GE:
132 | s = "TEST_GE";
133 | break;
134 | case STNODE_OP_LT:
135 | s = "TEST_LT";
136 | break;
137 | case STNODE_OP_LE:
138 | s = "TEST_LE";
139 | break;
140 | case STNODE_OP_BITWISE_AND:
141 | s = "OP_BITWISE_AND";
142 | break;
143 | case STNODE_OP_UNARY_MINUS:
144 | s = "OP_UNARY_MINUS";
145 | break;
146 | case STNODE_OP_ADD:
147 | s = "OP_ADD";
148 | break;
149 | case STNODE_OP_SUBTRACT:
150 | s = "OP_SUBTRACT";
151 | break;
152 | case STNODE_OP_MULTIPLY:
153 | s = "OP_MULTIPLY";
154 | break;
155 | case STNODE_OP_DIVIDE:
156 | s = "OP_DIVIDE";
157 | break;
158 | case STNODE_OP_MODULO:
159 | s = "OP_MODULO";
160 | break;
161 | case STNODE_OP_CONTAINS:
162 | s = "TEST_CONTAINS";
163 | break;
164 | case STNODE_OP_MATCHES:
165 | s = "TEST_MATCHES";
166 | break;
167 | case STNODE_OP_IN:
168 | s = "TEST_IN";
169 | break;
170 | case STNODE_OP_NOT_IN:
171 | s = "TEST_NOT_IN";
172 | break;
173 | case STNODE_OP_UNINITIALIZED:
174 | s = "(uninitialized)";
175 | break;
176 | }
177 |
178 | return s;
179 | }
180 |
181 | void
182 | stnode_clear(stnode_t *node)
183 | {
184 | if (node->type) {
185 | if (node->type->func_free && node->data) {
186 | node->type->func_free(node->data);
187 | }
188 | }
189 | else {
190 | ws_assert(!node->data)do { if ((1) && !(!node->data)) ws_log_fatal_full( "DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 190 , __func__, "assertion failed: %s", "!node->data"); } while (0);
191 | }
192 |
193 | node->type = NULL((void*)0);
194 | node->data = NULL((void*)0);
195 | g_free(node->repr_display);
196 | node->repr_display = NULL((void*)0);
197 | g_free(node->repr_debug);
198 | node->repr_debug = NULL((void*)0);
199 | g_free(node->repr_token);
200 | node->repr_token = NULL((void*)0);
201 | node->location.col_start = -1;
202 | node->location.col_len = 0;
203 | node->flags = 0;
204 | }
205 |
206 | void
207 | stnode_init(stnode_t *node, sttype_id_t type_id, void *data, char *token, df_loc_t loc)
208 | {
209 | sttype_t *type;
210 |
211 | ws_assert(!node->type)do { if ((1) && !(!node->type)) ws_log_fatal_full( "DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 211 , __func__, "assertion failed: %s", "!node->type"); } while (0);
212 | ws_assert(!node->data)do { if ((1) && !(!node->data)) ws_log_fatal_full( "DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 212 , __func__, "assertion failed: %s", "!node->data"); } while (0);
213 | node->repr_display = NULL((void*)0);
214 | node->repr_debug = NULL((void*)0);
215 | node->repr_token = token;
216 | node->location = loc;
217 | node->flags = 0;
218 |
219 | if (type_id == STTYPE_UNINITIALIZED) {
220 | node->type = NULL((void*)0);
221 | node->data = NULL((void*)0);
222 | }
223 | else {
224 | /* Creating an initialized node with a NULL pointer is
225 | * allowed and needs to be safe. The parser relies on that. */
226 | type = sttype_lookup(type_id);
227 | ws_assert(type)do { if ((1) && !(type)) ws_log_fatal_full("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 227, __func__ , "assertion failed: %s", "type"); } while (0);
228 | node->type = type;
229 | if (type->func_new) {
230 | node->data = type->func_new(data);
231 | }
232 | else {
233 | node->data = data;
234 | }
235 | }
236 | }
237 |
238 | void
239 | stnode_replace(stnode_t *node, sttype_id_t type_id, void *data)
240 | {
241 | char *token = g_strdup(node->repr_token)g_strdup_inline (node->repr_token);
242 | df_loc_t loc = node->location;
243 | uint16_t flags = node->flags;
244 | stnode_clear(node);
245 | stnode_init(node, type_id, data, token, loc);
246 | node->flags = flags;
247 | }
248 |
249 | void
250 | stnode_mutate(stnode_t *node, sttype_id_t type_id)
251 | {
252 | //FIXME: Assert there all the same sttype
253 | node->type = sttype_lookup(type_id);
254 | ws_assert(node->type)do { if ((1) && !(node->type)) ws_log_fatal_full("DFilter" , LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 254, __func__ , "assertion failed: %s", "node->type"); } while (0);
255 | }
256 |
257 | stnode_t*
258 | stnode_new(sttype_id_t type_id, void *data, char *token, df_loc_t loc)
259 | {
260 | stnode_t *node = g_new0(stnode_t, 1)((stnode_t *) g_malloc0_n ((1), sizeof (stnode_t)));
261 | stnode_init(node, type_id, data, token, loc);
262 | return node;
263 | }
264 |
265 | stnode_t*
266 | stnode_new_empty(sttype_id_t type_id)
267 | {
268 | df_loc_t loc = {-1, 0};
269 | return stnode_new(type_id, NULL((void*)0), NULL((void*)0), loc);
270 | }
271 |
272 | stnode_t*
273 | stnode_dup(const stnode_t *node)
274 | {
275 | stnode_t *new;
276 |
277 | new = g_new(stnode_t, 1)((stnode_t *) g_malloc_n ((1), sizeof (stnode_t)));
278 | new->repr_display = NULL((void*)0);
279 | new->repr_debug = NULL((void*)0);
280 | new->repr_token = g_strdup(node->repr_token)g_strdup_inline (node->repr_token);
281 | new->location = node->location;
282 | new->flags = node->flags;
283 |
284 | new->type = node->type;
285 | if (node->type == NULL((void*)0))
286 | new->data = NULL((void*)0);
287 | else if (node->type->func_dup)
288 | new->data = node->type->func_dup(node->data);
289 | else
290 | new->data = node->data;
291 |
292 | return new;
293 | }
294 |
295 | void
296 | stnode_free(stnode_t *node)
297 | {
298 | stnode_clear(node);
299 | g_free(node);
300 | }
301 |
302 | const char*
303 | stnode_type_name(const stnode_t *node)
304 | {
305 | return sttype_name(node->type->id);
306 | }
307 |
308 | sttype_id_t
309 | stnode_type_id(const stnode_t *node)
310 | {
311 | if (node->type)
312 | return node->type->id;
313 | else
314 | return STTYPE_UNINITIALIZED;
315 | }
316 |
317 | void *
318 | stnode_data(stnode_t *node)
319 | {
320 | return node->data;
321 | }
322 |
323 | GString *
324 | stnode_string(stnode_t *node)
325 | {
326 | ws_assert(stnode_type_id(node) == STTYPE_STRING)do { if ((1) && !(stnode_type_id(node) == STTYPE_STRING )) ws_log_fatal_full("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c" , 326, __func__, "assertion failed: %s", "stnode_type_id(node) == STTYPE_STRING" ); } while (0);
327 | return stnode_data(node);
328 | }
329 |
330 | void *
331 | stnode_steal_data(stnode_t *node)
332 | {
333 | void *data = node->data;
334 | ws_assert(data)do { if ((1) && !(data)) ws_log_fatal_full("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 334, __func__ , "assertion failed: %s", "data"); } while (0);
335 | node->data = NULL((void*)0);
336 | return data;
337 | }
338 |
339 | const char *
340 | stnode_token(const stnode_t *node)
341 | {
342 | return node->repr_token;
343 | }
344 |
345 | df_loc_t
346 | stnode_location(const stnode_t *node)
347 | {
348 | return node->location;
349 | }
350 |
351 | void
352 | stnode_set_location(stnode_t *node, df_loc_t loc)
353 | {
354 | node->location = loc;
355 | }
356 |
357 | bool_Bool
358 | stnode_get_flags(stnode_t *node, uint16_t flags)
359 | {
360 | return node->flags & flags;
361 | }
362 |
363 | void
364 | stnode_set_flags(stnode_t *node, uint16_t flags)
365 | {
366 | node->flags |= flags;
367 | }
368 |
369 | /* Finds the first and last location from a set and creates
370 | * a new location from start of first (col_start) to end of
371 | * last (col_start + col_len). Sets the result to dst. */
372 | void
373 | stnode_merge_location(stnode_t *dst, stnode_t *n1, stnode_t *n2)
374 | {
375 | df_loc_t first, last;
376 | df_loc_t loc2;
377 |
378 | first = last = stnode_location(n1);
379 | loc2 = stnode_location(n2);
380 | if (loc2.col_start >= 0 && loc2.col_start > first.col_start)
381 | last = loc2;
382 | dst->location.col_start = first.col_start;
383 | dst->location.col_len = last.col_start - first.col_start + last.col_len;
384 | }
385 |
386 | #define IS_OPERATOR(node)(stnode_type_id(node) == STTYPE_TEST || stnode_type_id(node) == STTYPE_ARITHMETIC) \
387 | (stnode_type_id(node) == STTYPE_TEST || \
388 | stnode_type_id(node) == STTYPE_ARITHMETIC)
389 |
390 | static char *
391 | _node_tostr(stnode_t *node, bool_Bool pretty)
392 | {
393 | char *s, *repr;
394 |
395 | if (node->type->func_tostr == NULL((void*)0))
396 | s = g_strdup("FIXME")g_strdup_inline ("FIXME");
397 | else
398 | s = node->type->func_tostr(node->data, pretty);
399 |
400 | if (pretty)
401 | return s;
402 |
403 | if (IS_OPERATOR(node)(stnode_type_id(node) == STTYPE_TEST || stnode_type_id(node) == STTYPE_ARITHMETIC)) {
404 | repr = s;
405 | }
406 | else {
407 | repr = ws_strdup_printf("%s(%s)", stnode_type_name(node), s)wmem_strdup_printf(((void*)0), "%s(%s)", stnode_type_name(node ), s);
408 | g_free(s);
409 | }
410 |
411 | return repr;
412 | }
413 |
414 | const char *
415 | stnode_tostr(stnode_t *node, bool_Bool pretty)
416 | {
417 | if (pretty && IS_OPERATOR(node)(stnode_type_id(node) == STTYPE_TEST || stnode_type_id(node) == STTYPE_ARITHMETIC) && node->repr_token != NULL((void*)0)) {
418 | /* Some operators can have synonyms, like "or" and "||".
419 | * Show the user the same representation as he typed. */
420 | g_free(node->repr_display);
421 | node->repr_display = g_strdup(node->repr_token)g_strdup_inline (node->repr_token);
422 | return node->repr_display;
423 | }
424 |
425 | char *str = _node_tostr(node, pretty);
426 |
427 | if (pretty) {
428 | g_free(node->repr_display);
429 | node->repr_display = str;
430 | }
431 | else {
432 | g_free(node->repr_debug);
433 | node->repr_debug = str;
434 | }
435 |
436 | return str;
437 | }
438 |
439 | static char *
440 | sprint_node(stnode_t *node)
441 | {
442 | wmem_strbuf_t *buf = wmem_strbuf_new(NULL((void*)0), NULL((void*)0));
443 |
444 | wmem_strbuf_append_printf(buf, "{ ");
445 | wmem_strbuf_append_printf(buf, "type = %s, ", stnode_type_name(node));
446 | wmem_strbuf_append_printf(buf, "data = %s, ", stnode_todebug(node)stnode_tostr(node, 0));
447 | wmem_strbuf_append_printf(buf, "location = %ld:%zu",
448 | node->location.col_start, node->location.col_len);
449 | wmem_strbuf_append_printf(buf, " }");
450 | return wmem_strbuf_finalize(buf);
451 | }
452 |
453 | void
454 | log_node_full(enum ws_log_level level,
455 | const char *file, int line, const char *func,
456 | stnode_t *node, const char *msg)
457 | {
458 | if (!ws_log_msg_is_active(WS_LOG_DOMAIN"DFilter", level))
459 | return;
460 |
461 | if (node == NULL((void*)0)) {
462 | ws_log_write_always_full(WS_LOG_DOMAIN"DFilter", level,
463 | file, line, func, "%s is NULL", msg);
464 | return;
465 | }
466 |
467 | char *str = sprint_node(node);
468 |
469 | ws_log_write_always_full(WS_LOG_DOMAIN"DFilter", level, file, line, func,
470 | "%s = %s", msg, str);
471 |
472 | g_free(str);
473 | }
474 |
475 | void
476 | log_test_full(enum ws_log_level level,
477 | const char *file, int line, const char *func,
478 | stnode_t *node, const char *msg)
479 | {
480 | if (!ws_log_msg_is_active(WS_LOG_DOMAIN"DFilter", level))
481 | return;
482 |
483 | if (node == NULL((void*)0)) {
484 | ws_log_write_always_full(WS_LOG_DOMAIN"DFilter", level,
485 | file, line, func, "%s is NULL", msg);
486 | return;
487 | }
488 |
489 | stnode_op_t st_op;
490 | stnode_t *st_lhs = NULL((void*)0), *st_rhs = NULL((void*)0);
491 | char *lhs = NULL((void*)0), *rhs = NULL((void*)0);
492 |
493 | sttype_oper_get(node, &st_op, &st_lhs, &st_rhs);
494 |
495 | if (st_lhs)
496 | lhs = sprint_node(st_lhs);
497 | if (st_rhs)
498 | rhs = sprint_node(st_rhs);
499 |
500 | ws_log_write_always_full(WS_LOG_DOMAIN"DFilter", level, file, line, func,
501 | "%s:\n LHS = %s\n RHS = %s",
502 | stnode_todebug(node)stnode_tostr(node, 0),
503 | lhs ? lhs : "NULL",
504 | rhs ? rhs : "NULL");
505 |
506 | g_free(lhs);
507 | g_free(rhs);
508 | }
509 |
510 | static void
511 | indent(wmem_strbuf_t *buf, int level)
512 | {
513 | for (int i = 0; i < level * 2; i++) {
514 | wmem_strbuf_append_c(buf, ' ');
515 | }
516 | wmem_strbuf_append_printf(buf, "% 2d ", level);
517 | }
518 |
519 | static void
520 | visit_tree(wmem_strbuf_t *buf, stnode_t *node, int level)
521 | {
522 | stnode_t *left, *right;
523 | stnode_t *lower, *upper;
524 | GSList *params;
525 | GSList *nodelist;
526 |
527 | if (stnode_type_id(node) == STTYPE_TEST ||
528 | stnode_type_id(node) == STTYPE_ARITHMETIC) {
529 | wmem_strbuf_append_printf(buf, "%s:\n", stnode_todebug(node)stnode_tostr(node, 0));
530 | sttype_oper_get(node, NULL((void*)0), &left, &right);
531 | if (left && right) {
532 | indent(buf, level + 1);
533 | visit_tree(buf, left, level + 1);
534 | wmem_strbuf_append_c(buf, '\n');
535 | indent(buf, level + 1);
536 | visit_tree(buf, right, level + 1);
537 | }
538 | else if (left) {
539 | indent(buf, level + 1);
540 | visit_tree(buf, left, level + 1);
541 | }
542 | else if (right) {
543 | ws_assert_not_reached()ws_log_fatal_full("DFilter", LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c" , 543, __func__, "assertion \"not reached\" failed");
544 | }
545 | }
546 | else if (stnode_type_id(node) == STTYPE_SET) {
547 | nodelist = stnode_data(node);
548 | wmem_strbuf_append_printf(buf, "SET(#%u):\n", g_slist_length(nodelist) / 2);
549 | while (nodelist) {
550 | indent(buf, level + 1);
551 | lower = nodelist->data;
552 | wmem_strbuf_append(buf, stnode_tostr(lower, false0));
553 | /* Set elements are always in pairs; upper may be null. */
554 | nodelist = g_slist_next(nodelist)((nodelist) ? (((GSList *)(nodelist))->next) : ((void*)0));
555 | ws_assert(nodelist)do { if ((1) && !(nodelist)) ws_log_fatal_full("DFilter" , LOG_LEVEL_ERROR, "epan/dfilter/syntax-tree.c", 555, __func__ , "assertion failed: %s", "nodelist"); } while (0);
556 | upper = nodelist->data;
557 | if (upper != NULL((void*)0)) {
558 | wmem_strbuf_append(buf, " .. ");
559 | wmem_strbuf_append(buf, stnode_tostr(upper, false0));
560 | }
561 | nodelist = g_slist_next(nodelist)((nodelist) ? (((GSList *)(nodelist))->next) : ((void*)0));
562 | if (nodelist != NULL((void*)0)) {
563 | wmem_strbuf_append_c(buf, '\n');
564 | }
565 | }
566 | }
567 | else if (stnode_type_id(node) == STTYPE_FUNCTION) {
568 | wmem_strbuf_append_printf(buf, "%s:\n", stnode_todebug(node)stnode_tostr(node, 0));
569 | params = sttype_function_params(node);
570 | while (params) {
571 | indent(buf, level + 1);
572 | visit_tree(buf, params->data, level + 1);
573 | if (params->next != NULL((void*)0)) {
574 | wmem_strbuf_append_c(buf, '\n');
575 | }
576 | params = params->next;
577 | }
578 | }
579 | else {
580 | wmem_strbuf_append(buf, stnode_todebug(node)stnode_tostr(node, 0));
581 | }
582 | }
583 |
584 | char *
585 | dump_syntax_tree_str(stnode_t *root)
586 | {
587 | wmem_strbuf_t *buf = wmem_strbuf_new(NULL((void*)0), NULL((void*)0));
588 | indent(buf, 0);
589 | visit_tree(buf, root, 0);
590 | return wmem_strbuf_finalize(buf);
591 | }
592 |
593 | void
594 | log_syntax_tree(enum ws_log_level level, stnode_t *root, const char *msg, char **cache_ptr)
595 | {
596 | if (!ws_log_msg_is_active(LOG_DOMAIN_DFILTER"DFilter", level))
597 | return;
598 |
599 | char *str = dump_syntax_tree_str(root);
600 |
601 | ws_log_write_always_full(LOG_DOMAIN_DFILTER"DFilter", level, NULL((void*)0), -1, NULL((void*)0),
602 | "%s:\n%s", msg, str);
603 |
604 | if (cache_ptr) {
605 | *cache_ptr = str;
606 | }
607 | else {
608 | g_free(str);
609 | }
610 | }
611 |
612 | /*
613 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
614 | *
615 | * Local variables:
616 | * c-basic-offset: 8
617 | * tab-width: 8
618 | * indent-tabs-mode: t
619 | * End:
620 | *
621 | * vi: set shiftwidth=8 tabstop=8 noexpandtab:
622 | * :indentSize=8:tabSize=8:noTabs=false:
623 | */