6cd62ccf |
1 | /* |
2 | |
3 | parser.c: Generate helper declarations and functions to trace events |
4 | from an event description file. |
5 | |
6 | Copyright (C) 2002, Xianxiu Yang |
7 | Copyright (C) 2002, Michel Dagenais |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by |
10 | the Free Software Foundation; version 2 of the License. |
11 | |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
16 | |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software |
19 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
20 | */ |
21 | |
963b5f2d |
22 | /* This program reads the ".xml" event definitions input files |
23 | and constructs structure for each event. |
6cd62ccf |
24 | |
25 | The program uses a very simple tokenizer, called from a hand written |
26 | recursive descent parser to fill a data structure describing the events. |
27 | The result is a sequence of events definitions which refer to type |
28 | definitions. |
29 | |
30 | A table of named types is maintained to allow refering to types by name |
31 | when the same type is used at several places. Finally a sequence of |
32 | all types is maintained to facilitate the freeing of all type |
963b5f2d |
33 | information when the processing of an ".xml" file is finished. */ |
6cd62ccf |
34 | |
35 | #include <stdlib.h> |
36 | #include <string.h> |
37 | #include <stdio.h> |
38 | #include <stdarg.h> |
39 | #include <linux/errno.h> |
40 | |
41 | |
42 | #include "parser.h" |
43 | |
44 | |
45 | /***************************************************************************** |
46 | *Function name |
47 | * getSize : translate from string to integer |
48 | *Input params |
49 | * in : input file handle |
50 | *Return values |
51 | * size |
52 | *****************************************************************************/ |
53 | |
54 | int getSize(parse_file *in) |
55 | { |
56 | char *token; |
57 | |
58 | token = getToken(in); |
59 | if(in->type == NUMBER) { |
60 | if(strcmp(token,"1") == 0) return 0; |
61 | else if(strcmp(token,"2") == 0) return 1; |
62 | else if(strcmp(token,"4") == 0) return 2; |
63 | else if(strcmp(token,"8") == 0) return 3; |
64 | } |
65 | else if(in->type == NAME) { |
66 | if(strcmp(token,"short") == 0) return 4; |
67 | else if(strcmp(token,"medium") == 0) return 5; |
68 | else if(strcmp(token,"long") == 0) return 6; |
69 | } |
70 | in->error(in,"incorrect size specification"); |
71 | return -1; |
72 | } |
73 | |
74 | /***************************************************************************** |
75 | *Function name |
76 | * error_callback : print out error info |
77 | *Input params |
78 | * in : input file handle |
79 | * msg : message to be printed |
80 | ****************************************************************************/ |
81 | |
82 | void error_callback(parse_file *in, char *msg) |
83 | { |
84 | if(in) |
85 | printf("Error in file %s, line %d: %s\n", in->name, in->lineno, msg); |
86 | else |
87 | printf("%s\n",msg); |
88 | exit(1); |
89 | } |
90 | |
91 | /***************************************************************************** |
92 | *Function name |
93 | * memAlloc : allocate memory |
94 | *Input params |
95 | * size : required memory size |
96 | *return value |
97 | * void * : pointer to allocate memory or NULL |
98 | ****************************************************************************/ |
99 | |
100 | void * memAlloc(int size) |
101 | { |
963b5f2d |
102 | void * addr; |
103 | if(size == 0) return NULL; |
104 | addr = malloc(size); |
6cd62ccf |
105 | if(!addr){ |
106 | printf("Failed to allocate memory"); |
107 | exit(1); |
108 | } |
109 | return addr; |
110 | } |
111 | |
112 | /***************************************************************************** |
113 | *Function name |
114 | * allocAndCopy : allocate memory and initialize it |
115 | *Input params |
116 | * str : string to be put in memory |
117 | *return value |
118 | * char * : pointer to allocate memory or NULL |
119 | ****************************************************************************/ |
120 | |
121 | char *allocAndCopy(char *str) |
122 | { |
963b5f2d |
123 | char * addr; |
124 | if(str == NULL) return NULL; |
125 | addr = (char *)memAlloc(strlen(str)+1); |
6cd62ccf |
126 | strcpy(addr,str); |
127 | return addr; |
128 | } |
129 | |
963b5f2d |
130 | /************************************************************************** |
131 | * Function : |
132 | * getNameAttribute,getFormatAttribute,getSizeAttribute,getValueAttribute |
133 | * getValueStrAttribute |
134 | * Description : |
135 | * Read the attribute from the input file. |
136 | * |
137 | * Parameters : |
138 | * in , input file handle. |
139 | * |
140 | * Return values : |
141 | * address of the attribute. |
142 | * |
143 | **************************************************************************/ |
144 | |
145 | char * getNameAttribute(parse_file *in) |
146 | { |
147 | char * token, car; |
148 | token = getName(in); |
149 | if(strcmp("name",token))in->error(in,"name was expected"); |
150 | getEqual(in); |
151 | |
152 | car = seekNextChar(in); |
153 | if(car == EOF)in->error(in,"name was expected"); |
154 | else if(car == '\"')token = getQuotedString(in); |
155 | else token = getName(in); |
156 | return token; |
157 | } |
158 | |
159 | char * getFormatAttribute(parse_file *in) |
160 | { |
161 | char * token; |
162 | |
163 | //format is an option |
164 | token = getToken(in); |
bf410332 |
165 | if(strcmp("/",token) == 0 || strcmp(">",token) == 0){ |
963b5f2d |
166 | ungetToken(in); |
167 | return NULL; |
168 | } |
169 | |
170 | if(strcmp("format",token))in->error(in,"format was expected"); |
171 | getEqual(in); |
172 | token = getQuotedString(in); |
173 | return token; |
174 | } |
175 | |
176 | int getSizeAttribute(parse_file *in) |
177 | { |
178 | char * token; |
179 | getName(in); |
180 | getEqual(in); |
181 | |
182 | return getSize(in); |
183 | } |
184 | |
185 | int getValueAttribute(parse_file *in) |
186 | { |
187 | char * token; |
188 | getName(in); |
189 | getEqual(in); |
190 | |
191 | return getNumber(in); |
192 | } |
193 | |
194 | //for <label name=label_name value=n/>, value is an option |
195 | char * getValueStrAttribute(parse_file *in) |
196 | { |
197 | char * token; |
198 | |
199 | token = getToken(in); |
200 | if(strcmp("/",token) == 0){ |
201 | ungetToken(in); |
202 | return NULL; |
203 | } |
204 | |
205 | if(strcmp("value",token))in->error(in,"value was expected"); |
206 | getEqual(in); |
207 | token = getToken(in); |
208 | if(in->type != NUMBER) in->error(in,"number was expected"); |
209 | return token; |
210 | } |
211 | |
212 | char * getDescription(parse_file *in) |
213 | { |
214 | long int pos; |
215 | char * token, car, *str; |
216 | |
217 | pos = ftell(in->fp); |
218 | |
219 | getLAnglebracket(in); |
220 | token = getName(in); |
221 | if(strcmp("description",token)){ |
222 | fseek(in->fp, pos, SEEK_SET); |
223 | return NULL; |
224 | } |
225 | |
226 | getRAnglebracket(in); |
227 | |
228 | pos = 0; |
229 | while((car = getc(in->fp)) != EOF) { |
230 | if(car == '<') break; |
231 | if(car == '\0') continue; |
232 | in->buffer[pos] = car; |
233 | pos++; |
234 | } |
235 | if(car == EOF)in->error(in,"not a valid description"); |
236 | in->buffer[pos] = '\0'; |
237 | |
238 | str = allocAndCopy(in->buffer); |
239 | |
240 | getForwardslash(in); |
241 | token = getName(in); |
242 | if(strcmp("description", token))in->error(in,"not a valid description"); |
243 | getRAnglebracket(in); |
244 | |
245 | return str; |
246 | } |
247 | |
248 | /***************************************************************************** |
249 | *Function name |
250 | * parseFacility : generate event list |
251 | *Input params |
252 | * in : input file handle |
253 | * fac : empty facility |
254 | *Output params |
255 | * fac : facility filled with event list |
256 | ****************************************************************************/ |
257 | |
258 | void parseFacility(parse_file *in, facility * fac) |
259 | { |
260 | char * token; |
261 | event *ev; |
262 | |
263 | fac->name = allocAndCopy(getNameAttribute(in)); |
264 | getRAnglebracket(in); |
265 | |
ed9d56bd |
266 | fac->description = getDescription(in); |
963b5f2d |
267 | |
268 | while(1){ |
269 | getLAnglebracket(in); |
270 | |
271 | token = getToken(in); |
272 | if(in->type == ENDFILE) |
273 | in->error(in,"the definition of the facility is not finished"); |
274 | |
275 | if(strcmp("event",token) == 0){ |
276 | ev = (event*) memAlloc(sizeof(event)); |
277 | sequence_push(&(fac->events),ev); |
278 | parseEvent(in,ev, &(fac->unnamed_types), &(fac->named_types)); |
279 | }else if(strcmp("type",token) == 0){ |
280 | parseTypeDefinition(in, &(fac->unnamed_types), &(fac->named_types)); |
281 | }else if(in->type == FORWARDSLASH){ |
282 | break; |
283 | }else in->error(in,"event or type token expected\n"); |
284 | } |
285 | |
286 | token = getName(in); |
287 | if(strcmp("facility",token)) in->error(in,"not the end of the facility"); |
288 | getRAnglebracket(in); //</facility> |
289 | } |
6cd62ccf |
290 | |
291 | /***************************************************************************** |
292 | *Function name |
293 | * parseEvent : generate event from event definition |
294 | *Input params |
295 | * in : input file handle |
296 | * ev : new event |
963b5f2d |
297 | * unnamed_types : array of unamed types |
298 | * named_types : array of named types |
6cd62ccf |
299 | *Output params |
300 | * ev : new event (parameters are passed to it) |
301 | ****************************************************************************/ |
302 | |
303 | void parseEvent(parse_file *in, event * ev, sequence * unnamed_types, |
304 | table * named_types) |
305 | { |
306 | char *token; |
307 | type_descriptor *t; |
308 | |
963b5f2d |
309 | //<event name=eventtype_name> |
310 | ev->name = allocAndCopy(getNameAttribute(in)); |
311 | getRAnglebracket(in); |
6cd62ccf |
312 | |
963b5f2d |
313 | //<description>...</descriptio> |
ed9d56bd |
314 | ev->description = getDescription(in); |
6cd62ccf |
315 | |
963b5f2d |
316 | //event can have STRUCT, TYPEREF or NOTHING |
317 | getLAnglebracket(in); |
6cd62ccf |
318 | |
963b5f2d |
319 | token = getToken(in); |
320 | if(in->type == FORWARDSLASH){ //</event> NOTHING |
321 | ev->type = NULL; |
322 | }else if(in->type == NAME){ |
323 | if(strcmp("struct",token)==0 || strcmp("typeref",token)==0){ |
324 | ungetToken(in); |
325 | ev->type = parseType(in,NULL, unnamed_types, named_types); |
326 | if(ev->type->type != STRUCT && ev->type->type != NONE) |
327 | in->error(in,"type must be a struct"); |
328 | }else in->error(in, "not a valid type"); |
329 | |
330 | getLAnglebracket(in); |
331 | getForwardslash(in); |
6cd62ccf |
332 | }else in->error(in,"not a struct type"); |
333 | |
963b5f2d |
334 | token = getName(in); |
335 | if(strcmp("event",token))in->error(in,"not an event definition"); |
336 | getRAnglebracket(in); //</event> |
6cd62ccf |
337 | } |
338 | |
339 | /***************************************************************************** |
340 | *Function name |
963b5f2d |
341 | * parseField : get field infomation from buffer |
6cd62ccf |
342 | *Input params |
963b5f2d |
343 | * in : input file handle |
344 | * t : type descriptor |
345 | * unnamed_types : array of unamed types |
346 | * named_types : array of named types |
6cd62ccf |
347 | ****************************************************************************/ |
348 | |
349 | void parseFields(parse_file *in, type_descriptor *t, sequence * unnamed_types, |
350 | table * named_types) |
351 | { |
352 | char * token; |
353 | field *f; |
354 | |
963b5f2d |
355 | f = (field *)memAlloc(sizeof(field)); |
356 | sequence_push(&(t->fields),f); |
6cd62ccf |
357 | |
963b5f2d |
358 | //<field name=field_name> <description> <type> </field> |
359 | f->name = allocAndCopy(getNameAttribute(in)); |
360 | getRAnglebracket(in); |
361 | |
ed9d56bd |
362 | f->description = getDescription(in); |
963b5f2d |
363 | |
364 | //<int size=...> |
365 | getLAnglebracket(in); |
366 | f->type = parseType(in,NULL, unnamed_types, named_types); |
6cd62ccf |
367 | |
963b5f2d |
368 | getLAnglebracket(in); |
369 | getForwardslash(in); |
370 | token = getName(in); |
371 | if(strcmp("field",token))in->error(in,"not a valid field definition"); |
372 | getRAnglebracket(in); //</field> |
6cd62ccf |
373 | } |
374 | |
375 | |
376 | /***************************************************************************** |
377 | *Function name |
378 | * parseType : get type information, type can be : |
379 | * Primitive: |
380 | * int(size,fmt); uint(size,fmt); float(size,fmt); |
381 | * string(fmt); enum(size,fmt,(label1,label2...)) |
382 | * Compound: |
383 | * array(arraySize, type); sequence(lengthSize,type) |
384 | * struct(field(name,type,description)...) |
385 | * type name: |
386 | * type(name,type) |
387 | *Input params |
388 | * in : input file handle |
389 | * inType : a type descriptor |
963b5f2d |
390 | * unnamed_types : array of unamed types |
391 | * named_types : array of named types |
6cd62ccf |
392 | *Return values |
393 | * type_descriptor* : a type descriptor |
394 | ****************************************************************************/ |
395 | |
396 | type_descriptor *parseType(parse_file *in, type_descriptor *inType, |
397 | sequence * unnamed_types, table * named_types) |
398 | { |
963b5f2d |
399 | char *token; |
6cd62ccf |
400 | type_descriptor *t; |
401 | |
402 | if(inType == NULL) { |
403 | t = (type_descriptor *) memAlloc(sizeof(type_descriptor)); |
404 | t->type_name = NULL; |
405 | t->type = NONE; |
406 | t->fmt = NULL; |
407 | sequence_push(unnamed_types,t); |
408 | } |
409 | else t = inType; |
410 | |
411 | token = getName(in); |
412 | |
413 | if(strcmp(token,"struct") == 0) { |
414 | t->type = STRUCT; |
963b5f2d |
415 | getRAnglebracket(in); //<struct> |
416 | getLAnglebracket(in); //<field name=..> |
417 | token = getToken(in); |
418 | sequence_init(&(t->fields)); |
419 | while(strcmp("field",token) == 0){ |
420 | parseFields(in,t, unnamed_types, named_types); |
421 | |
422 | //next field |
423 | getLAnglebracket(in); |
424 | token = getToken(in); |
425 | } |
426 | if(strcmp("/",token))in->error(in,"not a valid structure definition"); |
427 | token = getName(in); |
428 | if(strcmp("struct",token)!=0) |
429 | in->error(in,"not a valid structure definition"); |
430 | getRAnglebracket(in); //</struct> |
431 | } |
432 | else if(strcmp(token,"union") == 0) { |
433 | t->type = UNION; |
434 | t->size = getSizeAttribute(in); |
435 | getRAnglebracket(in); //<union typecodesize=isize> |
436 | |
437 | getLAnglebracket(in); //<field name=..> |
438 | token = getToken(in); |
439 | sequence_init(&(t->fields)); |
440 | while(strcmp("field",token) == 0){ |
441 | parseFields(in,t, unnamed_types, named_types); |
442 | |
443 | //next field |
444 | getLAnglebracket(in); |
445 | token = getToken(in); |
446 | } |
447 | if(strcmp("/",token))in->error(in,"not a valid union definition"); |
448 | token = getName(in); |
449 | if(strcmp("union",token)!=0) |
450 | in->error(in,"not a valid union definition"); |
451 | getRAnglebracket(in); //</union> |
6cd62ccf |
452 | } |
453 | else if(strcmp(token,"array") == 0) { |
454 | t->type = ARRAY; |
963b5f2d |
455 | t->size = getValueAttribute(in); |
456 | getRAnglebracket(in); //<array size=n> |
457 | |
458 | getLAnglebracket(in); //<type struct> |
6cd62ccf |
459 | t->nested_type = parseType(in,NULL, unnamed_types, named_types); |
963b5f2d |
460 | |
461 | getLAnglebracket(in); //</array> |
462 | getForwardslash(in); |
463 | token = getName(in); |
464 | if(strcmp("array",token))in->error(in,"not a valid array definition"); |
465 | getRAnglebracket(in); //</array> |
6cd62ccf |
466 | } |
467 | else if(strcmp(token,"sequence") == 0) { |
468 | t->type = SEQUENCE; |
963b5f2d |
469 | t->size = getSizeAttribute(in); |
470 | getRAnglebracket(in); //<array lengthsize=isize> |
471 | |
472 | getLAnglebracket(in); //<type struct> |
6cd62ccf |
473 | t->nested_type = parseType(in,NULL, unnamed_types, named_types); |
963b5f2d |
474 | |
475 | getLAnglebracket(in); //</sequence> |
476 | getForwardslash(in); |
477 | token = getName(in); |
478 | if(strcmp("sequence",token))in->error(in,"not a valid sequence definition"); |
479 | getRAnglebracket(in); //</sequence> |
6cd62ccf |
480 | } |
481 | else if(strcmp(token,"enum") == 0) { |
963b5f2d |
482 | char * str, *str1; |
6cd62ccf |
483 | t->type = ENUM; |
484 | sequence_init(&(t->labels)); |
963b5f2d |
485 | t->size = getSizeAttribute(in); |
486 | t->fmt = allocAndCopy(getFormatAttribute(in)); |
487 | getRAnglebracket(in); |
488 | |
489 | //<label name=label1 value=n/> |
490 | getLAnglebracket(in); |
491 | token = getToken(in); //"label" or "/" |
492 | while(strcmp("label",token) == 0){ |
493 | str = allocAndCopy(getNameAttribute(in)); |
494 | token = getValueStrAttribute(in); |
495 | if(token){ |
496 | str1 = appendString(str,"="); |
497 | free(str); |
498 | str = appendString(str1,token); |
499 | free(str1); |
becaca6d |
500 | sequence_push(&(t->labels),str); |
963b5f2d |
501 | }else |
becaca6d |
502 | sequence_push(&(t->labels),str); |
963b5f2d |
503 | |
504 | getForwardslash(in); |
505 | getRAnglebracket(in); |
506 | |
507 | //next label definition |
508 | getLAnglebracket(in); |
509 | token = getToken(in); //"label" or "/" |
510 | } |
511 | if(strcmp("/",token))in->error(in, "not a valid enum definition"); |
512 | token = getName(in); |
513 | if(strcmp("enum",token))in->error(in, "not a valid enum definition"); |
514 | getRAnglebracket(in); //</label> |
6cd62ccf |
515 | } |
516 | else if(strcmp(token,"int") == 0) { |
517 | t->type = INT; |
963b5f2d |
518 | t->size = getSizeAttribute(in); |
519 | t->fmt = allocAndCopy(getFormatAttribute(in)); |
520 | getForwardslash(in); |
521 | getRAnglebracket(in); |
6cd62ccf |
522 | } |
523 | else if(strcmp(token,"uint") == 0) { |
524 | t->type = UINT; |
963b5f2d |
525 | t->size = getSizeAttribute(in); |
526 | t->fmt = allocAndCopy(getFormatAttribute(in)); |
527 | getForwardslash(in); |
528 | getRAnglebracket(in); |
6cd62ccf |
529 | } |
530 | else if(strcmp(token,"float") == 0) { |
531 | t->type = FLOAT; |
963b5f2d |
532 | t->size = getSizeAttribute(in); |
533 | t->fmt = allocAndCopy(getFormatAttribute(in)); |
534 | getForwardslash(in); |
535 | getRAnglebracket(in); |
6cd62ccf |
536 | } |
537 | else if(strcmp(token,"string") == 0) { |
538 | t->type = STRING; |
963b5f2d |
539 | t->fmt = allocAndCopy(getFormatAttribute(in)); |
540 | getForwardslash(in); |
541 | getRAnglebracket(in); |
6cd62ccf |
542 | } |
963b5f2d |
543 | else if(strcmp(token,"typeref") == 0){ |
544 | // Must be a named type |
6cd62ccf |
545 | if(inType != NULL) |
546 | in->error(in,"Named type cannot refer to a named type"); |
547 | else { |
548 | free(t); |
549 | sequence_pop(unnamed_types); |
963b5f2d |
550 | token = getNameAttribute(in); |
551 | t = find_named_type(token, named_types); |
552 | getForwardslash(in); //<typeref name=type_name/> |
553 | getRAnglebracket(in); |
554 | return t; |
6cd62ccf |
555 | } |
963b5f2d |
556 | }else in->error(in,"not a valid type"); |
6cd62ccf |
557 | |
558 | return t; |
559 | } |
560 | |
561 | /***************************************************************************** |
562 | *Function name |
563 | * find_named_type : find a named type from hash table |
564 | *Input params |
565 | * name : type name |
963b5f2d |
566 | * named_types : array of named types |
6cd62ccf |
567 | *Return values |
568 | * type_descriptor * : a type descriptor |
569 | *****************************************************************************/ |
570 | |
571 | type_descriptor * find_named_type(char *name, table * named_types) |
572 | { |
573 | type_descriptor *t; |
574 | |
575 | t = table_find(named_types,name); |
576 | if(t == NULL) { |
577 | t = (type_descriptor *)memAlloc(sizeof(type_descriptor)); |
578 | t->type_name = allocAndCopy(name); |
579 | t->type = NONE; |
580 | t->fmt = NULL; |
581 | table_insert(named_types,allocAndCopy(name),t); |
582 | } |
583 | return t; |
584 | } |
585 | |
586 | /***************************************************************************** |
587 | *Function name |
588 | * parseTypeDefinition : get type information from type definition |
589 | *Input params |
590 | * in : input file handle |
963b5f2d |
591 | * unnamed_types : array of unamed types |
592 | * named_types : array of named types |
6cd62ccf |
593 | *****************************************************************************/ |
594 | |
595 | void parseTypeDefinition(parse_file * in, sequence * unnamed_types, |
596 | table * named_types) |
597 | { |
598 | char *token; |
599 | type_descriptor *t; |
600 | |
963b5f2d |
601 | token = getNameAttribute(in); |
6cd62ccf |
602 | t = find_named_type(token, named_types); |
6cd62ccf |
603 | |
604 | if(t->type != NONE) in->error(in,"redefinition of named type"); |
963b5f2d |
605 | getRAnglebracket(in); //<type name=type_name> |
606 | getLAnglebracket(in); //<struct> |
607 | token = getName(in); |
608 | if(strcmp("struct",token))in->error(in,"not a valid type definition"); |
609 | ungetToken(in); |
6cd62ccf |
610 | parseType(in,t, unnamed_types, named_types); |
963b5f2d |
611 | |
612 | //</type> |
613 | getLAnglebracket(in); |
614 | getForwardslash(in); |
615 | token = getName(in); |
616 | if(strcmp("type",token))in->error(in,"not a valid type definition"); |
617 | getRAnglebracket(in); //</type> |
6cd62ccf |
618 | } |
619 | |
620 | /************************************************************************** |
621 | * Function : |
963b5f2d |
622 | * getComa, getName, getNumber, getEqual |
6cd62ccf |
623 | * Description : |
624 | * Read a token from the input file, check its type, return it scontent. |
625 | * |
626 | * Parameters : |
627 | * in , input file handle. |
628 | * |
629 | * Return values : |
630 | * address of token content. |
631 | * |
632 | **************************************************************************/ |
633 | |
634 | char *getName(parse_file * in) |
635 | { |
636 | char *token; |
637 | |
638 | token = getToken(in); |
639 | if(in->type != NAME) in->error(in,"Name token was expected"); |
640 | return token; |
641 | } |
642 | |
643 | int getNumber(parse_file * in) |
644 | { |
645 | char *token; |
646 | |
647 | token = getToken(in); |
648 | if(in->type != NUMBER) in->error(in, "Number token was expected"); |
649 | return atoi(token); |
650 | } |
651 | |
963b5f2d |
652 | char *getForwardslash(parse_file * in) |
6cd62ccf |
653 | { |
654 | char *token; |
655 | |
656 | token = getToken(in); |
963b5f2d |
657 | if(in->type != FORWARDSLASH) in->error(in, "forward slash token was expected"); |
6cd62ccf |
658 | return token; |
659 | } |
660 | |
963b5f2d |
661 | char *getLAnglebracket(parse_file * in) |
6cd62ccf |
662 | { |
663 | char *token; |
664 | |
665 | token = getToken(in); |
963b5f2d |
666 | if(in->type != LANGLEBRACKET) in->error(in, "Left angle bracket was expected"); |
6cd62ccf |
667 | return token; |
668 | } |
669 | |
963b5f2d |
670 | char *getRAnglebracket(parse_file * in) |
6cd62ccf |
671 | { |
672 | char *token; |
673 | |
674 | token = getToken(in); |
963b5f2d |
675 | if(in->type != RANGLEBRACKET) in->error(in, "Right angle bracket was expected"); |
6cd62ccf |
676 | return token; |
677 | } |
678 | |
679 | char *getQuotedString(parse_file * in) |
680 | { |
681 | char *token; |
682 | |
683 | token = getToken(in); |
684 | if(in->type != QUOTEDSTRING) in->error(in, "quoted string was expected"); |
685 | return token; |
686 | } |
687 | |
963b5f2d |
688 | char * getEqual(parse_file *in) |
6cd62ccf |
689 | { |
690 | char *token; |
691 | |
692 | token = getToken(in); |
963b5f2d |
693 | if(in->type != EQUAL) in->error(in, "equal was expected"); |
6cd62ccf |
694 | return token; |
695 | } |
696 | |
963b5f2d |
697 | char seekNextChar(parse_file *in) |
6cd62ccf |
698 | { |
963b5f2d |
699 | char car; |
700 | while((car = getc(in->fp)) != EOF) { |
701 | if(!isspace(car)){ |
702 | ungetc(car,in->fp); |
703 | return car; |
704 | } |
705 | } |
706 | return EOF; |
6cd62ccf |
707 | } |
708 | |
709 | /****************************************************************** |
710 | * Function : |
711 | * getToken, ungetToken |
712 | * Description : |
713 | * Read a token from the input file and return its type and content. |
714 | * Line numbers are accounted for and whitespace/comments are skipped. |
715 | * |
716 | * Parameters : |
717 | * in, input file handle. |
718 | * |
719 | * Return values : |
720 | * address of token content. |
721 | * |
722 | ******************************************************************/ |
723 | |
724 | void ungetToken(parse_file * in) |
725 | { |
726 | in->unget = 1; |
727 | } |
728 | |
729 | char *getToken(parse_file * in) |
730 | { |
731 | FILE *fp = in->fp; |
732 | char car, car1; |
733 | int pos = 0, escaped; |
734 | |
735 | if(in->unget == 1) { |
736 | in->unget = 0; |
737 | return in->buffer; |
738 | } |
739 | |
740 | /* skip whitespace and comments */ |
741 | |
742 | while((car = getc(fp)) != EOF) { |
743 | if(car == '/') { |
744 | car1 = getc(fp); |
745 | if(car1 == '*') skipComment(in); |
746 | else if(car1 == '/') skipEOL(in); |
747 | else { |
748 | car1 = ungetc(car1,fp); |
749 | break; |
750 | } |
751 | } |
752 | else if(car == '\n') in->lineno++; |
753 | else if(!isspace(car)) break; |
754 | } |
755 | |
756 | switch(car) { |
757 | case EOF: |
758 | in->type = ENDFILE; |
759 | break; |
963b5f2d |
760 | case '/': |
761 | in->type = FORWARDSLASH; |
6cd62ccf |
762 | in->buffer[pos] = car; |
763 | pos++; |
764 | break; |
963b5f2d |
765 | case '<': |
766 | in->type = LANGLEBRACKET; |
6cd62ccf |
767 | in->buffer[pos] = car; |
768 | pos++; |
769 | break; |
963b5f2d |
770 | case '>': |
771 | in->type = RANGLEBRACKET; |
6cd62ccf |
772 | in->buffer[pos] = car; |
773 | pos++; |
774 | break; |
775 | case '=': |
776 | in->type = EQUAL; |
777 | in->buffer[pos] = car; |
778 | pos++; |
779 | break; |
780 | case '"': |
781 | escaped = 0; |
782 | while((car = getc(fp)) != EOF && pos < BUFFER_SIZE) { |
783 | if(car == '\\' && escaped == 0) { |
784 | in->buffer[pos] = car; |
785 | pos++; |
786 | escaped = 1; |
787 | continue; |
788 | } |
789 | if(car == '"' && escaped == 0) break; |
790 | if(car == '\n' && escaped == 0) { |
791 | in->error(in, "non escaped newline inside quoted string"); |
792 | } |
793 | if(car == '\n') in->lineno++; |
794 | in->buffer[pos] = car; |
795 | pos++; |
796 | escaped = 0; |
797 | } |
798 | if(car == EOF) in->error(in,"no ending quotemark"); |
799 | if(pos == BUFFER_SIZE) in->error(in, "quoted string token too large"); |
800 | in->type = QUOTEDSTRING; |
801 | break; |
802 | default: |
803 | if(isdigit(car)) { |
804 | in->buffer[pos] = car; |
805 | pos++; |
806 | while((car = getc(fp)) != EOF && pos < BUFFER_SIZE) { |
807 | if(!isdigit(car)) { |
808 | ungetc(car,fp); |
809 | break; |
810 | } |
811 | in->buffer[pos] = car; |
812 | pos++; |
813 | } |
814 | if(car == EOF) ungetc(car,fp); |
815 | if(pos == BUFFER_SIZE) in->error(in, "number token too large"); |
816 | in->type = NUMBER; |
817 | } |
818 | else if(isalpha(car)) { |
819 | in->buffer[0] = car; |
820 | pos = 1; |
821 | while((car = getc(fp)) != EOF && pos < BUFFER_SIZE) { |
822 | if(!isalnum(car)) { |
823 | ungetc(car,fp); |
824 | break; |
825 | } |
826 | in->buffer[pos] = car; |
827 | pos++; |
828 | } |
829 | if(car == EOF) ungetc(car,fp); |
830 | if(pos == BUFFER_SIZE) in->error(in, "name token too large"); |
831 | in->type = NAME; |
832 | } |
833 | else in->error(in, "invalid character, unrecognized token"); |
834 | } |
835 | in->buffer[pos] = 0; |
836 | return in->buffer; |
837 | } |
838 | |
839 | void skipComment(parse_file * in) |
840 | { |
841 | char car; |
842 | while((car = getc(in->fp)) != EOF) { |
843 | if(car == '\n') in->lineno++; |
844 | else if(car == '*') { |
845 | car = getc(in->fp); |
846 | if(car ==EOF) break; |
847 | if(car == '/') return; |
848 | ungetc(car,in->fp); |
849 | } |
850 | } |
851 | if(car == EOF) in->error(in,"comment begining with '/*' has no ending '*/'"); |
852 | } |
853 | |
854 | void skipEOL(parse_file * in) |
855 | { |
856 | char car; |
857 | while((car = getc(in->fp)) != EOF) { |
858 | if(car == '\n') { |
859 | ungetc(car,in->fp); |
860 | break; |
861 | } |
862 | } |
863 | if(car == EOF)ungetc(car, in->fp); |
864 | } |
865 | |
866 | int isalpha(char c) |
867 | { |
868 | int i,j; |
869 | if(c == '_')return 1; |
870 | i = c - 'a'; |
871 | j = c - 'A'; |
872 | if((i>=0 && i<26) || (j>=0 && j<26)) return 1; |
873 | return 0; |
874 | } |
875 | |
876 | int isalnum(char c) |
877 | { |
878 | return (isalpha(c) || isdigit(c)); |
879 | } |
880 | |
881 | /***************************************************************************** |
882 | *Function name |
883 | * checkNamedTypesImplemented : check if all named types have definition |
884 | ****************************************************************************/ |
885 | |
886 | void checkNamedTypesImplemented(table * named_types) |
887 | { |
888 | type_descriptor *t; |
889 | int pos; |
890 | char str[256]; |
891 | |
892 | for(pos = 0 ; pos < named_types->values.position; pos++) { |
893 | t = (type_descriptor *) named_types->values.array[pos]; |
894 | if(t->type == NONE){ |
895 | sprintf(str,"named type '%s' has no definition",(char*)named_types->keys.array[pos]); |
896 | error_callback(NULL,str); |
897 | } |
898 | } |
899 | } |
900 | |
901 | |
902 | /***************************************************************************** |
903 | *Function name |
904 | * generateChecksum : generate checksum for the facility |
905 | *Input Params |
906 | * facName : name of facility |
907 | *Output Params |
908 | * checksum : checksum for the facility |
909 | ****************************************************************************/ |
910 | |
911 | void generateChecksum( char* facName, unsigned long * checksum, sequence * events) |
912 | { |
913 | unsigned long crc ; |
963b5f2d |
914 | int pos; |
6cd62ccf |
915 | event * ev; |
916 | char str[256]; |
917 | |
918 | crc = crc32(facName); |
919 | for(pos = 0; pos < events->position; pos++){ |
920 | ev = (event *)(events->array[pos]); |
6cd62ccf |
921 | crc = partial_crc32(ev->name,crc); |
963b5f2d |
922 | if(!ev->type) continue; //event without type |
6cd62ccf |
923 | if(ev->type->type != STRUCT){ |
924 | sprintf(str,"event '%s' has a type other than STRUCT",ev->name); |
925 | error_callback(NULL, str); |
926 | } |
963b5f2d |
927 | crc = getTypeChecksum(crc, ev->type); |
6cd62ccf |
928 | } |
929 | *checksum = crc; |
930 | } |
931 | |
932 | /***************************************************************************** |
933 | *Function name |
934 | * getTypeChecksum : generate checksum by type info |
935 | *Input Params |
936 | * crc : checksum generated so far |
937 | * type : type descriptor containing type info |
938 | *Return value |
939 | * unsigned long : checksum |
940 | *****************************************************************************/ |
941 | |
963b5f2d |
942 | unsigned long getTypeChecksum(unsigned long aCrc, type_descriptor * type) |
6cd62ccf |
943 | { |
944 | unsigned long crc = aCrc; |
945 | char * str = NULL, buf[16]; |
963b5f2d |
946 | int flag = 0, pos; |
6cd62ccf |
947 | field * fld; |
6cd62ccf |
948 | |
949 | switch(type->type){ |
950 | case INT: |
951 | str = intOutputTypes[type->size]; |
952 | break; |
953 | case UINT: |
954 | str = uintOutputTypes[type->size]; |
955 | break; |
956 | case FLOAT: |
957 | str = floatOutputTypes[type->size]; |
958 | break; |
959 | case STRING: |
960 | str = allocAndCopy("string"); |
961 | flag = 1; |
962 | break; |
963 | case ENUM: |
964 | str = appendString("enum ", uintOutputTypes[type->size]); |
965 | flag = 1; |
966 | break; |
967 | case ARRAY: |
968 | sprintf(buf,"%d\0",type->size); |
969 | str = appendString("array ",buf); |
970 | flag = 1; |
971 | break; |
972 | case SEQUENCE: |
973 | sprintf(buf,"%d\0",type->size); |
974 | str = appendString("sequence ",buf); |
975 | flag = 1; |
976 | break; |
977 | case STRUCT: |
978 | str = allocAndCopy("struct"); |
979 | flag = 1; |
980 | break; |
963b5f2d |
981 | case UNION: |
982 | str = allocAndCopy("union"); |
983 | flag = 1; |
984 | break; |
6cd62ccf |
985 | default: |
986 | error_callback(NULL, "named type has no definition"); |
987 | break; |
988 | } |
989 | |
990 | crc = partial_crc32(str,crc); |
991 | if(flag) free(str); |
992 | |
993 | if(type->fmt) crc = partial_crc32(type->fmt,crc); |
994 | |
995 | if(type->type == ARRAY || type->type == SEQUENCE){ |
963b5f2d |
996 | crc = getTypeChecksum(crc,type->nested_type); |
997 | }else if(type->type == STRUCT || type->type == UNION){ |
998 | for(pos =0; pos < type->fields.position; pos++){ |
999 | fld = (field *) type->fields.array[pos]; |
1000 | crc = partial_crc32(fld->name,crc); |
1001 | crc = getTypeChecksum(crc, fld->type); |
1002 | } |
6cd62ccf |
1003 | }else if(type->type == ENUM){ |
1004 | for(pos = 0; pos < type->labels.position; pos++) |
963b5f2d |
1005 | crc = partial_crc32((char*)type->labels.array[pos],crc); |
6cd62ccf |
1006 | } |
1007 | |
1008 | return crc; |
1009 | } |
1010 | |
1011 | |
1012 | /* Event type descriptors */ |
1013 | void freeType(type_descriptor * tp) |
1014 | { |
1015 | int pos2; |
1016 | field *f; |
1017 | |
1018 | if(tp->fmt != NULL) free(tp->fmt); |
1019 | if(tp->type == ENUM) { |
1020 | for(pos2 = 0; pos2 < tp->labels.position; pos2++) { |
1021 | free(tp->labels.array[pos2]); |
1022 | } |
1023 | sequence_dispose(&(tp->labels)); |
1024 | } |
1025 | if(tp->type == STRUCT) { |
1026 | for(pos2 = 0; pos2 < tp->fields.position; pos2++) { |
1027 | f = (field *) tp->fields.array[pos2]; |
1028 | free(f->name); |
1029 | free(f->description); |
1030 | free(f); |
1031 | } |
1032 | sequence_dispose(&(tp->fields)); |
1033 | } |
1034 | } |
1035 | |
1036 | void freeNamedType(table * t) |
1037 | { |
1038 | int pos; |
1039 | type_descriptor * td; |
1040 | |
1041 | for(pos = 0 ; pos < t->keys.position; pos++) { |
1042 | free((char *)t->keys.array[pos]); |
1043 | td = (type_descriptor*)t->values.array[pos]; |
1044 | freeType(td); |
1045 | free(td); |
1046 | } |
1047 | } |
1048 | |
1049 | void freeTypes(sequence *t) |
1050 | { |
1051 | int pos, pos2; |
1052 | type_descriptor *tp; |
1053 | field *f; |
1054 | |
1055 | for(pos = 0 ; pos < t->position; pos++) { |
1056 | tp = (type_descriptor *)t->array[pos]; |
1057 | freeType(tp); |
1058 | free(tp); |
1059 | } |
1060 | } |
1061 | |
1062 | void freeEvents(sequence *t) |
1063 | { |
1064 | int pos; |
1065 | event *ev; |
1066 | |
1067 | for(pos = 0 ; pos < t->position; pos++) { |
1068 | ev = (event *) t->array[pos]; |
1069 | free(ev->name); |
1070 | free(ev->description); |
1071 | free(ev); |
1072 | } |
1073 | |
1074 | } |
1075 | |
1076 | |
1077 | /* Extensible array */ |
1078 | |
1079 | void sequence_init(sequence *t) |
1080 | { |
1081 | t->size = 10; |
1082 | t->position = 0; |
1083 | t->array = (void **)memAlloc(t->size * sizeof(void *)); |
1084 | } |
1085 | |
1086 | void sequence_dispose(sequence *t) |
1087 | { |
1088 | t->size = 0; |
1089 | free(t->array); |
1090 | t->array = NULL; |
1091 | } |
1092 | |
1093 | void sequence_push(sequence *t, void *elem) |
1094 | { |
1095 | void **tmp; |
1096 | |
1097 | if(t->position >= t->size) { |
1098 | tmp = t->array; |
1099 | t->array = (void **)memAlloc(t->size * 2 * sizeof(void *)); |
1100 | memcpy(t->array, tmp, t->size * sizeof(void *)); |
1101 | t->size = t->size * 2; |
1102 | free(tmp); |
1103 | } |
1104 | t->array[t->position] = elem; |
1105 | t->position++; |
1106 | } |
1107 | |
1108 | void *sequence_pop(sequence *t) |
1109 | { |
1110 | return t->array[t->position--]; |
1111 | } |
1112 | |
1113 | |
1114 | /* Hash table API, implementation is just linear search for now */ |
1115 | |
1116 | void table_init(table *t) |
1117 | { |
1118 | sequence_init(&(t->keys)); |
1119 | sequence_init(&(t->values)); |
1120 | } |
1121 | |
1122 | void table_dispose(table *t) |
1123 | { |
1124 | sequence_dispose(&(t->keys)); |
1125 | sequence_dispose(&(t->values)); |
1126 | } |
1127 | |
1128 | void table_insert(table *t, char *key, void *value) |
1129 | { |
1130 | sequence_push(&(t->keys),key); |
1131 | sequence_push(&(t->values),value); |
1132 | } |
1133 | |
1134 | void *table_find(table *t, char *key) |
1135 | { |
1136 | int pos; |
1137 | for(pos = 0 ; pos < t->keys.position; pos++) { |
1138 | if(strcmp((char *)key,(char *)t->keys.array[pos]) == 0) |
1139 | return(t->values.array[pos]); |
1140 | } |
1141 | return NULL; |
1142 | } |
1143 | |
1144 | void table_insert_int(table *t, int *key, void *value) |
1145 | { |
1146 | sequence_push(&(t->keys),key); |
1147 | sequence_push(&(t->values),value); |
1148 | } |
1149 | |
1150 | void *table_find_int(table *t, int *key) |
1151 | { |
1152 | int pos; |
1153 | for(pos = 0 ; pos < t->keys.position; pos++) { |
1154 | if(*key == *(int *)t->keys.array[pos]) |
1155 | return(t->values.array[pos]); |
1156 | } |
1157 | return NULL; |
1158 | } |
1159 | |
1160 | |
1161 | /* Concatenate strings */ |
1162 | |
1163 | char *appendString(char *s, char *suffix) |
1164 | { |
1165 | char *tmp; |
963b5f2d |
1166 | if(suffix == NULL) return s; |
6cd62ccf |
1167 | |
1168 | tmp = (char *)memAlloc(strlen(s) + strlen(suffix) + 1); |
1169 | strcpy(tmp,s); |
1170 | strcat(tmp,suffix); |
1171 | return tmp; |
1172 | } |
1173 | |
1174 | |