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9d0662e0 | 1 | /* |
1ab84bf3 | 2 | * Command format string parser for CLI backend. |
9d0662e0 | 3 | * |
1ab84bf3 | 4 | * -- |
9547b5d0 | 5 | * Copyright (C) 2016 Cumulus Networks, Inc. |
9d0662e0 | 6 | * |
1ab84bf3 QY |
7 | * This file is part of GNU Zebra. |
8 | * | |
9 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2, or (at your option) any | |
12 | * later version. | |
13 | * | |
14 | * GNU Zebra is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
21 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
22 | * 02111-1307, USA. | |
9d0662e0 QY |
23 | */ |
24 | ||
92055a92 | 25 | %{ |
1ab84bf3 QY |
26 | // compile with debugging facilities |
27 | #define YYDEBUG 1 | |
51fc9379 | 28 | %} |
782d9789 | 29 | |
8bb647a8 | 30 | %locations |
05dbb7df | 31 | /* define parse.error verbose */ |
e9484f70 | 32 | %define api.pure full |
0d37f9f3 | 33 | /* define api.prefix {cmd_yy} */ |
e9484f70 | 34 | |
51fc9379 | 35 | /* names for generated header and parser files */ |
4a121f99 DL |
36 | %defines "lib/command_parse.h" |
37 | %output "lib/command_parse.c" | |
5a8bbed0 | 38 | |
afc3a6ce DL |
39 | /* note: code blocks are output in order, to both .c and .h: |
40 | * 1. %code requires | |
41 | * 2. %union + bison forward decls | |
42 | * 3. %code provides | |
43 | * command_lex.h needs to be included at 3.; it needs the union and YYSTYPE. | |
44 | * struct parser_ctx is needed for the bison forward decls. | |
45 | */ | |
eceb1066 | 46 | %code requires { |
92e50261 DL |
47 | #include "config.h" |
48 | ||
eb44e1aa | 49 | #include <stdbool.h> |
5894e76d DL |
50 | #include <stdlib.h> |
51 | #include <string.h> | |
52 | #include <ctype.h> | |
53 | ||
54 | #include "command_graph.h" | |
a9958674 | 55 | #include "log.h" |
51fc9379 | 56 | |
55b7f20f DL |
57 | DECLARE_MTYPE(LEX) |
58 | ||
afc3a6ce | 59 | #define YYSTYPE CMD_YYSTYPE |
8bb647a8 | 60 | #define YYLTYPE CMD_YYLTYPE |
afc3a6ce | 61 | struct parser_ctx; |
2020b1c8 DL |
62 | |
63 | /* subgraph semantic value */ | |
64 | struct subgraph { | |
65 | struct graph_node *start, *end; | |
66 | }; | |
afc3a6ce DL |
67 | } |
68 | ||
69 | %union { | |
70 | long long number; | |
71 | char *string; | |
72 | struct graph_node *node; | |
2020b1c8 | 73 | struct subgraph subgraph; |
afc3a6ce DL |
74 | } |
75 | ||
76 | %code provides { | |
77 | #ifndef FLEX_SCANNER | |
78 | #include "command_lex.h" | |
79 | #endif | |
80 | ||
81 | extern void set_lexer_string (yyscan_t *scn, const char *string); | |
82 | extern void cleanup_lexer (yyscan_t *scn); | |
83 | ||
b07a15f8 | 84 | struct parser_ctx { |
e9484f70 DL |
85 | yyscan_t scanner; |
86 | ||
b07a15f8 DL |
87 | struct cmd_element *el; |
88 | ||
89 | struct graph *graph; | |
fd19e7a2 | 90 | struct graph_node *currnode; |
b07a15f8 DL |
91 | |
92 | /* pointers to copy of command docstring */ | |
93 | char *docstr_start, *docstr; | |
94 | }; | |
92055a92 QY |
95 | } |
96 | ||
51fc9379 | 97 | /* union types for lexed tokens */ |
5a5d576b QY |
98 | %token <string> WORD |
99 | %token <string> IPV4 | |
100 | %token <string> IPV4_PREFIX | |
101 | %token <string> IPV6 | |
102 | %token <string> IPV6_PREFIX | |
103 | %token <string> VARIABLE | |
104 | %token <string> RANGE | |
9779e3f1 QY |
105 | %token <string> MAC |
106 | %token <string> MAC_PREFIX | |
782d9789 | 107 | |
51fc9379 | 108 | /* union types for parsed rules */ |
782d9789 | 109 | %type <node> start |
782d9789 QY |
110 | %type <node> literal_token |
111 | %type <node> placeholder_token | |
16705ecc | 112 | %type <node> placeholder_token_real |
9286efab | 113 | %type <node> simple_token |
9286efab QY |
114 | %type <subgraph> selector |
115 | %type <subgraph> selector_token | |
116 | %type <subgraph> selector_token_seq | |
117 | %type <subgraph> selector_seq_seq | |
782d9789 | 118 | |
16705ecc DL |
119 | %type <string> varname_token |
120 | ||
51fc9379 | 121 | %code { |
e9484f70 | 122 | |
51fc9379 QY |
123 | /* bison declarations */ |
124 | void | |
8bb647a8 | 125 | cmd_yyerror (CMD_YYLTYPE *locp, struct parser_ctx *ctx, char const *msg); |
1eb5e8dc | 126 | |
51fc9379 | 127 | /* helper functions for parser */ |
83364d20 | 128 | static const char * |
b07a15f8 | 129 | doc_next (struct parser_ctx *ctx); |
51fc9379 | 130 | |
1eb5e8dc | 131 | static struct graph_node * |
b07a15f8 | 132 | new_token_node (struct parser_ctx *, |
d0bfb22c | 133 | enum cmd_token_type type, |
83364d20 DL |
134 | const char *text, |
135 | const char *doc); | |
51fc9379 QY |
136 | |
137 | static void | |
8bb647a8 | 138 | terminate_graph (CMD_YYLTYPE *locp, struct parser_ctx *ctx, |
b07a15f8 | 139 | struct graph_node *); |
51fc9379 QY |
140 | |
141 | static void | |
b07a15f8 | 142 | cleanup (struct parser_ctx *ctx); |
e9484f70 | 143 | |
eb44e1aa DL |
144 | static void loopcheck(struct parser_ctx *ctx, struct subgraph *sg); |
145 | ||
e9484f70 | 146 | #define scanner ctx->scanner |
51fc9379 QY |
147 | } |
148 | ||
149 | /* yyparse parameters */ | |
e9484f70 DL |
150 | %lex-param {yyscan_t scanner} |
151 | %parse-param {struct parser_ctx *ctx} | |
51fc9379 QY |
152 | |
153 | /* called automatically before yyparse */ | |
154 | %initial-action { | |
155 | /* clear state pointers */ | |
fd19e7a2 | 156 | ctx->currnode = vector_slot (ctx->graph->nodes, 0); |
51fc9379 | 157 | |
51fc9379 | 158 | /* copy docstring and keep a pointer to the copy */ |
b07a15f8 | 159 | if (ctx->el->doc) |
a9958674 QY |
160 | { |
161 | // allocate a new buffer, making room for a flag | |
b07a15f8 DL |
162 | size_t length = (size_t) strlen (ctx->el->doc) + 2; |
163 | ctx->docstr = malloc (length); | |
164 | memcpy (ctx->docstr, ctx->el->doc, strlen (ctx->el->doc)); | |
a9958674 | 165 | // set the flag so doc_next knows when to print a warning |
b07a15f8 | 166 | ctx->docstr[length - 2] = 0x03; |
a9958674 | 167 | // null terminate |
b07a15f8 | 168 | ctx->docstr[length - 1] = 0x00; |
a9958674 | 169 | } |
b07a15f8 | 170 | ctx->docstr_start = ctx->docstr; |
51fc9379 | 171 | } |
92055a92 | 172 | |
92055a92 QY |
173 | %% |
174 | ||
88255c7c | 175 | start: |
fd19e7a2 | 176 | cmd_token_seq |
880e24a1 | 177 | { |
51fc9379 | 178 | // tack on the command element |
8bb647a8 | 179 | terminate_graph (&@1, ctx, ctx->currnode); |
880e24a1 | 180 | } |
fd19e7a2 | 181 | | cmd_token_seq placeholder_token '.' '.' '.' |
88255c7c | 182 | { |
6432969d | 183 | if ((ctx->currnode = graph_add_edge (ctx->currnode, $2)) != $2) |
fd19e7a2 | 184 | graph_delete_node (ctx->graph, $2); |
88255c7c | 185 | |
4d94b292 | 186 | ((struct cmd_token *)ctx->currnode->data)->allowrepeat = 1; |
7d5718c1 | 187 | |
1ab84bf3 | 188 | // adding a node as a child of itself accepts any number |
a9958674 | 189 | // of the same token, which is what we want for variadics |
6432969d | 190 | graph_add_edge (ctx->currnode, ctx->currnode); |
88255c7c | 191 | |
51fc9379 | 192 | // tack on the command element |
8bb647a8 | 193 | terminate_graph (&@1, ctx, ctx->currnode); |
88255c7c | 194 | } |
9286efab | 195 | ; |
92055a92 | 196 | |
16705ecc DL |
197 | varname_token: '$' WORD |
198 | { | |
4d85f868 | 199 | $$ = $2; |
16705ecc DL |
200 | } |
201 | | /* empty */ | |
202 | { | |
203 | $$ = NULL; | |
204 | } | |
205 | ; | |
206 | ||
9286efab | 207 | cmd_token_seq: |
0d4aa1b1 | 208 | /* empty */ |
9286efab QY |
209 | | cmd_token_seq cmd_token |
210 | ; | |
92055a92 | 211 | |
782d9789 | 212 | cmd_token: |
9286efab | 213 | simple_token |
5a5d576b | 214 | { |
6432969d | 215 | if ((ctx->currnode = graph_add_edge (ctx->currnode, $1)) != $1) |
b07a15f8 | 216 | graph_delete_node (ctx->graph, $1); |
5a5d576b | 217 | } |
663982cd | 218 | | selector |
5a5d576b | 219 | { |
2020b1c8 DL |
220 | graph_add_edge (ctx->currnode, $1.start); |
221 | ctx->currnode = $1.end; | |
478bdaeb | 222 | } |
9286efab QY |
223 | ; |
224 | ||
225 | simple_token: | |
226 | literal_token | |
227 | | placeholder_token | |
228 | ; | |
229 | ||
16705ecc | 230 | literal_token: WORD varname_token |
9286efab | 231 | { |
83364d20 | 232 | $$ = new_token_node (ctx, WORD_TKN, $1, doc_next(ctx)); |
5894e76d | 233 | cmd_token_varname_set ($$->data, $2); |
16705ecc | 234 | XFREE (MTYPE_LEX, $2); |
55b7f20f | 235 | XFREE (MTYPE_LEX, $1); |
9286efab | 236 | } |
782d9789 QY |
237 | ; |
238 | ||
16705ecc | 239 | placeholder_token_real: |
478bdaeb | 240 | IPV4 |
4b0abf24 | 241 | { |
83364d20 | 242 | $$ = new_token_node (ctx, IPV4_TKN, $1, doc_next(ctx)); |
55b7f20f | 243 | XFREE (MTYPE_LEX, $1); |
4b0abf24 | 244 | } |
478bdaeb | 245 | | IPV4_PREFIX |
340a2b4a | 246 | { |
83364d20 | 247 | $$ = new_token_node (ctx, IPV4_PREFIX_TKN, $1, doc_next(ctx)); |
55b7f20f | 248 | XFREE (MTYPE_LEX, $1); |
4b0abf24 | 249 | } |
478bdaeb | 250 | | IPV6 |
340a2b4a | 251 | { |
83364d20 | 252 | $$ = new_token_node (ctx, IPV6_TKN, $1, doc_next(ctx)); |
55b7f20f | 253 | XFREE (MTYPE_LEX, $1); |
4b0abf24 | 254 | } |
478bdaeb | 255 | | IPV6_PREFIX |
340a2b4a | 256 | { |
83364d20 | 257 | $$ = new_token_node (ctx, IPV6_PREFIX_TKN, $1, doc_next(ctx)); |
55b7f20f | 258 | XFREE (MTYPE_LEX, $1); |
4b0abf24 | 259 | } |
478bdaeb | 260 | | VARIABLE |
340a2b4a | 261 | { |
83364d20 | 262 | $$ = new_token_node (ctx, VARIABLE_TKN, $1, doc_next(ctx)); |
55b7f20f | 263 | XFREE (MTYPE_LEX, $1); |
4b0abf24 | 264 | } |
478bdaeb QY |
265 | | RANGE |
266 | { | |
83364d20 | 267 | $$ = new_token_node (ctx, RANGE_TKN, $1, doc_next(ctx)); |
d0bfb22c | 268 | struct cmd_token *token = $$->data; |
478bdaeb QY |
269 | |
270 | // get the numbers out | |
b3899769 | 271 | yylval.string++; |
7a6ded40 | 272 | token->min = strtoll (yylval.string, &yylval.string, 10); |
ef955a80 | 273 | strsep (&yylval.string, "-"); |
7a6ded40 | 274 | token->max = strtoll (yylval.string, &yylval.string, 10); |
ef955a80 QY |
275 | |
276 | // validate range | |
8bb647a8 | 277 | if (token->min > token->max) cmd_yyerror (&@1, ctx, "Invalid range."); |
5a5d576b | 278 | |
55b7f20f | 279 | XFREE (MTYPE_LEX, $1); |
478bdaeb | 280 | } |
9779e3f1 QY |
281 | | MAC |
282 | { | |
283 | $$ = new_token_node (ctx, MAC_TKN, $1, doc_next(ctx)); | |
284 | XFREE (MTYPE_LEX, $1); | |
285 | } | |
286 | | MAC_PREFIX | |
287 | { | |
288 | $$ = new_token_node (ctx, MAC_PREFIX_TKN, $1, doc_next(ctx)); | |
289 | XFREE (MTYPE_LEX, $1); | |
290 | } | |
782d9789 | 291 | |
16705ecc DL |
292 | placeholder_token: |
293 | placeholder_token_real varname_token | |
294 | { | |
295 | struct cmd_token *token = $$->data; | |
296 | $$ = $1; | |
5894e76d | 297 | cmd_token_varname_set (token, $2); |
16705ecc DL |
298 | XFREE (MTYPE_LEX, $2); |
299 | }; | |
300 | ||
301 | ||
4b0abf24 | 302 | /* <selector|set> productions */ |
16705ecc | 303 | selector: '<' selector_seq_seq '>' varname_token |
2a23ca6e | 304 | { |
663982cd | 305 | $$ = $2; |
5894e76d | 306 | cmd_token_varname_set ($2.end->data, $4); |
16705ecc | 307 | XFREE (MTYPE_LEX, $4); |
2a23ca6e | 308 | }; |
782d9789 | 309 | |
9286efab QY |
310 | selector_seq_seq: |
311 | selector_seq_seq '|' selector_token_seq | |
478bdaeb | 312 | { |
663982cd | 313 | $$ = $1; |
2020b1c8 DL |
314 | graph_add_edge ($$.start, $3.start); |
315 | graph_add_edge ($3.end, $$.end); | |
9286efab | 316 | } |
663982cd | 317 | | selector_token_seq |
9286efab | 318 | { |
663982cd DL |
319 | $$.start = new_token_node (ctx, FORK_TKN, NULL, NULL); |
320 | $$.end = new_token_node (ctx, JOIN_TKN, NULL, NULL); | |
321 | ((struct cmd_token *)$$.start->data)->forkjoin = $$.end; | |
322 | ((struct cmd_token *)$$.end->data)->forkjoin = $$.start; | |
323 | ||
2020b1c8 DL |
324 | graph_add_edge ($$.start, $1.start); |
325 | graph_add_edge ($1.end, $$.end); | |
478bdaeb | 326 | } |
9286efab | 327 | ; |
782d9789 | 328 | |
7d5718c1 | 329 | /* {keyword} productions */ |
16705ecc | 330 | selector: '{' selector_seq_seq '}' varname_token |
7d5718c1 | 331 | { |
663982cd DL |
332 | $$ = $2; |
333 | graph_add_edge ($$.end, $$.start); | |
334 | /* there is intentionally no start->end link, for two reasons: | |
335 | * 1) this allows "at least 1 of" semantics, which are otherwise impossible | |
336 | * 2) this would add a start->end->start loop in the graph that the current | |
337 | * loop-avoidal fails to handle | |
338 | * just use [{a|b}] if neccessary, that will work perfectly fine, and reason | |
339 | * #1 is good enough to keep it this way. */ | |
16705ecc | 340 | |
eb44e1aa | 341 | loopcheck(ctx, &$$); |
5894e76d | 342 | cmd_token_varname_set ($2.end->data, $4); |
16705ecc | 343 | XFREE (MTYPE_LEX, $4); |
7d5718c1 DL |
344 | }; |
345 | ||
346 | ||
535ef556 | 347 | selector_token: |
9286efab | 348 | simple_token |
4b0abf24 | 349 | { |
2020b1c8 | 350 | $$.start = $$.end = $1; |
9286efab | 351 | } |
4d12266b | 352 | | selector |
9286efab | 353 | ; |
782d9789 | 354 | |
663982cd DL |
355 | selector_token_seq: |
356 | selector_token_seq selector_token | |
2a23ca6e | 357 | { |
2020b1c8 DL |
358 | graph_add_edge ($1.end, $2.start); |
359 | $$.start = $1.start; | |
360 | $$.end = $2.end; | |
2a23ca6e | 361 | } |
663982cd | 362 | | selector_token |
9286efab | 363 | ; |
478bdaeb | 364 | |
663982cd | 365 | /* [option] productions */ |
16705ecc | 366 | selector: '[' selector_seq_seq ']' varname_token |
9286efab | 367 | { |
663982cd DL |
368 | $$ = $2; |
369 | graph_add_edge ($$.start, $$.end); | |
5894e76d | 370 | cmd_token_varname_set ($2.end->data, $4); |
16705ecc | 371 | XFREE (MTYPE_LEX, $4); |
9286efab | 372 | } |
782d9789 QY |
373 | ; |
374 | ||
92055a92 | 375 | %% |
4b0abf24 | 376 | |
e9484f70 DL |
377 | #undef scanner |
378 | ||
55b7f20f DL |
379 | DEFINE_MTYPE(LIB, LEX, "Lexer token (temporary)") |
380 | ||
1eb5e8dc | 381 | void |
5894e76d | 382 | cmd_graph_parse (struct graph *graph, struct cmd_element *cmd) |
51fc9379 | 383 | { |
b07a15f8 DL |
384 | struct parser_ctx ctx = { .graph = graph, .el = cmd }; |
385 | ||
1ab84bf3 | 386 | // set to 1 to enable parser traces |
51fc9379 QY |
387 | yydebug = 0; |
388 | ||
e9484f70 DL |
389 | set_lexer_string (&ctx.scanner, cmd->string); |
390 | ||
51fc9379 | 391 | // parse command into DFA |
e9484f70 DL |
392 | cmd_yyparse (&ctx); |
393 | ||
394 | /* cleanup lexer */ | |
395 | cleanup_lexer (&ctx.scanner); | |
07079d78 | 396 | |
7a6ded40 | 397 | // cleanup |
b07a15f8 | 398 | cleanup (&ctx); |
51fc9379 QY |
399 | } |
400 | ||
401 | /* parser helper functions */ | |
402 | ||
eb44e1aa DL |
403 | static bool loopcheck_inner(struct graph_node *start, struct graph_node *node, |
404 | struct graph_node *end, size_t depth) | |
405 | { | |
406 | size_t i; | |
407 | bool ret; | |
408 | ||
409 | /* safety check */ | |
410 | if (depth++ == 64) | |
411 | return true; | |
412 | ||
413 | for (i = 0; i < vector_active(node->to); i++) { | |
414 | struct graph_node *next = vector_slot(node->to, i); | |
415 | struct cmd_token *tok = next->data; | |
416 | ||
417 | if (next == end || next == start) | |
418 | return true; | |
419 | if (tok->type < SPECIAL_TKN) | |
420 | continue; | |
421 | ret = loopcheck_inner(start, next, end, depth); | |
422 | if (ret) | |
423 | return true; | |
424 | } | |
425 | return false; | |
426 | } | |
427 | ||
428 | static void loopcheck(struct parser_ctx *ctx, struct subgraph *sg) | |
429 | { | |
430 | if (loopcheck_inner(sg->start, sg->start, sg->end, 0)) | |
431 | zlog_err("FATAL: '%s': {} contains an empty path! Use [{...}]", | |
432 | ctx->el->string); | |
433 | } | |
434 | ||
51fc9379 | 435 | void |
8bb647a8 | 436 | yyerror (CMD_YYLTYPE *loc, struct parser_ctx *ctx, char const *msg) |
51fc9379 | 437 | { |
8bb647a8 DL |
438 | char *tmpstr = strdup(ctx->el->string); |
439 | char *line, *eol; | |
440 | char spacing[256]; | |
441 | int lineno = 0; | |
442 | ||
b87478cb DS |
443 | zlog_notice ("%s: FATAL parse error: %s", __func__, msg); |
444 | zlog_notice ("%s: %d:%d-%d of this command definition:", __func__, loc->first_line, loc->first_column, loc->last_column); | |
8bb647a8 DL |
445 | |
446 | line = tmpstr; | |
447 | do { | |
448 | lineno++; | |
449 | eol = strchr(line, '\n'); | |
450 | if (eol) | |
451 | *eol++ = '\0'; | |
452 | ||
b87478cb | 453 | zlog_notice ("%s: | %s", __func__, line); |
8bb647a8 DL |
454 | if (lineno == loc->first_line && lineno == loc->last_line |
455 | && loc->first_column < (int)sizeof(spacing) - 1 | |
456 | && loc->last_column < (int)sizeof(spacing) - 1) { | |
457 | ||
458 | int len = loc->last_column - loc->first_column; | |
459 | if (len == 0) | |
460 | len = 1; | |
461 | ||
462 | memset(spacing, ' ', loc->first_column - 1); | |
463 | memset(spacing + loc->first_column - 1, '^', len); | |
464 | spacing[loc->first_column - 1 + len] = '\0'; | |
b87478cb | 465 | zlog_notice ("%s: | %s", __func__, spacing); |
8bb647a8 DL |
466 | } |
467 | } while ((line = eol)); | |
468 | free(tmpstr); | |
92055a92 | 469 | } |
782d9789 | 470 | |
51fc9379 | 471 | static void |
b07a15f8 | 472 | cleanup (struct parser_ctx *ctx) |
782d9789 | 473 | { |
51fc9379 | 474 | /* free resources */ |
b07a15f8 | 475 | free (ctx->docstr_start); |
478bdaeb | 476 | |
4b0abf24 | 477 | /* clear state pointers */ |
b07a15f8 DL |
478 | ctx->currnode = NULL; |
479 | ctx->docstr_start = ctx->docstr = NULL; | |
51fc9379 | 480 | } |
4b0abf24 | 481 | |
51fc9379 | 482 | static void |
8bb647a8 DL |
483 | terminate_graph (CMD_YYLTYPE *locp, struct parser_ctx *ctx, |
484 | struct graph_node *finalnode) | |
51fc9379 | 485 | { |
1eb5e8dc QY |
486 | // end of graph should look like this |
487 | // * -> finalnode -> END_TKN -> cmd_element | |
b07a15f8 | 488 | struct cmd_element *element = ctx->el; |
d8074cc0 | 489 | struct graph_node *end_token_node = |
83364d20 | 490 | new_token_node (ctx, END_TKN, CMD_CR_TEXT, ""); |
1eb5e8dc | 491 | struct graph_node *end_element_node = |
b5a1e9ef | 492 | graph_new_node (ctx->graph, element, NULL); |
7a6ded40 | 493 | |
ebb08130 QY |
494 | if (ctx->docstr && strlen (ctx->docstr) > 1) { |
495 | zlog_debug ("Excessive docstring while parsing '%s'", ctx->el->string); | |
496 | zlog_debug ("----------"); | |
497 | while (ctx->docstr && ctx->docstr[1] != '\0') | |
498 | zlog_debug ("%s", strsep(&ctx->docstr, "\n")); | |
499 | zlog_debug ("----------\n"); | |
500 | } | |
501 | ||
1eb5e8dc QY |
502 | graph_add_edge (finalnode, end_token_node); |
503 | graph_add_edge (end_token_node, end_element_node); | |
782d9789 | 504 | } |
f4b0c72e | 505 | |
83364d20 | 506 | static const char * |
b07a15f8 | 507 | doc_next (struct parser_ctx *ctx) |
51fc9379 | 508 | { |
b07a15f8 | 509 | const char *piece = ctx->docstr ? strsep (&ctx->docstr, "\n") : ""; |
a9958674 QY |
510 | if (*piece == 0x03) |
511 | { | |
b07a15f8 | 512 | zlog_debug ("Ran out of docstring while parsing '%s'", ctx->el->string); |
a9958674 QY |
513 | piece = ""; |
514 | } | |
515 | ||
83364d20 | 516 | return piece; |
51fc9379 QY |
517 | } |
518 | ||
519 | static struct graph_node * | |
b07a15f8 | 520 | new_token_node (struct parser_ctx *ctx, enum cmd_token_type type, |
83364d20 | 521 | const char *text, const char *doc) |
7a6ded40 | 522 | { |
5894e76d DL |
523 | struct cmd_token *token = cmd_token_new (type, ctx->el->attr, text, doc); |
524 | return graph_new_node (ctx->graph, token, (void (*)(void *)) &cmd_token_del); | |
7a6ded40 | 525 | } |