Bug Summary

File:builds/wireshark/wireshark/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-18/lib/clang/18 -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-18/lib/clang/18/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-truncation -Wno-format-nonliteral -Wno-pointer-sign -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -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 -dwarf-debug-flags /usr/lib/llvm-18/bin/clang -### --analyze -x c -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 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -fvisibility=hidden -fexcess-precision=fast -fstrict-flex-arrays=3 -fstack-clash-protection -fcf-protection=full -D _GLIBCXX_ASSERTIONS -fstack-protector-strong -fno-delete-null-pointer-checks -fno-strict-overflow -fno-strict-aliasing -fexceptions -Wno-format-truncation -Wno-format-nonliteral -fdiagnostics-color=always -Wno-pointer-sign -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -std=gnu11 -fPIC /builds/wireshark/wireshark/epan/dfilter/syntax-tree.c -o /builds/wireshark/wireshark/sbout/2024-11-17-100340-3912-1 -Xclang -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2024-11-17-100340-3912-1 -x c /builds/wireshark/wireshark/epan/dfilter/syntax-tree.c
1/*
2 * Wireshark - Network traffic analyzer
3 * By Gerald Combs <[email protected]>
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 */
22static sttype_t* type_list[STTYPE_NUM_TYPES];
23
24
25void
26sttype_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
38void
39sttype_cleanup(void)
40{
41 /* nothing to do */
42}
43
44
45void
46sttype_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
61static sttype_t*
62sttype_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
77const char *
78sttype_name(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
101const char *
102stnode_op_name(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
181void
182stnode_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
206void
207stnode_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
238void
239stnode_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
249void
250stnode_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
257stnode_t*
258stnode_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
265stnode_t*
266stnode_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
272stnode_t*
273stnode_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
295void
296stnode_free(stnode_t *node)
297{
298 stnode_clear(node);
299 g_free(node);
300}
301
302const char*
303stnode_type_name(stnode_t *node)
304{
305 return sttype_name(node->type->id);
306}
307
308sttype_id_t
309stnode_type_id(stnode_t *node)
310{
311 if (node->type)
312 return node->type->id;
313 else
314 return STTYPE_UNINITIALIZED;
315}
316
317void *
318stnode_data(stnode_t *node)
319{
320 return node->data;
321}
322
323GString *
324stnode_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
330void *
331stnode_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
339const char *
340stnode_token(stnode_t *node)
341{
342 return node->repr_token;
343}
344
345df_loc_t
346stnode_location(stnode_t *node)
347{
348 return node->location;
349}
350
351void
352stnode_set_location(stnode_t *node, df_loc_t loc)
353{
354 node->location = loc;
355}
356
357bool_Bool
358stnode_get_flags(stnode_t *node, uint16_t flags)
359{
360 return node->flags & flags;
361}
362
363void
364stnode_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. */
372void
373stnode_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
390static 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
414const char *
415stnode_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
439static char *
440sprint_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
453void
454log_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
475void
476log_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
510static void
511indent(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
519static void
520visit_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
584char *
585dump_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
593void
594log_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 */