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1 | /* | |
2 | ** Splint - annotation-assisted static program checker | |
3 | ** Copyright (C) 1994-2003 University of Virginia, | |
4 | ** Massachusetts Institute of Technology | |
5 | ** | |
6 | ** This program is free software; you can redistribute it and/or modify it | |
7 | ** under the terms of the GNU General Public License as published by the | |
8 | ** Free Software Foundation; either version 2 of the License, or (at your | |
9 | ** option) any later version. | |
10 | ** | |
11 | ** This program is distributed in the hope that it will be useful, but | |
12 | ** WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | ** General Public License for more details. | |
15 | ** | |
16 | ** The GNU General Public License is available from http://www.gnu.org/ or | |
17 | ** the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
18 | ** MA 02111-1307, USA. | |
19 | ** | |
20 | ** For information on splint: info@splint.org | |
21 | ** To report a bug: splint-bug@splint.org | |
22 | ** For more information: http://www.splint.org | |
23 | */ | |
24 | /* | |
25 | ** cprim.c | |
26 | */ | |
27 | ||
28 | # include "splintMacros.nf" | |
29 | # include "basic.h" | |
30 | ||
31 | static bool cprim_isReal (cprim c) | |
32 | { | |
33 | return (cprim_isAnyReal (c)); | |
34 | } | |
35 | ||
36 | static bool cprim_isNumeric (cprim c) | |
37 | { | |
38 | return (cprim_isReal (c) || cprim_isInt (c)); | |
39 | } | |
40 | ||
41 | cprim | |
42 | cprim_fromInt (int i) | |
43 | { | |
44 | if (i < CTX_UNKNOWN || i > CTX_LAST) | |
45 | { | |
46 | llcontbug (message ("cprim_fromInt: out of range: %d", i)); | |
47 | return CTX_UNKNOWN; | |
48 | } | |
49 | return (cprim) i; | |
50 | } | |
51 | ||
52 | ||
53 | /* | |
54 | ** not symmetric: c1 := c2 or c2 is passed as c1 | |
55 | ** (if RELAXQUALS, c1 must be "bigger" than c2) | |
56 | */ | |
57 | ||
58 | static bool cprim_closeEnoughAux (cprim p_c1, cprim p_c2, bool p_deep); | |
59 | ||
60 | bool | |
61 | cprim_closeEnoughDeep (cprim c1, cprim c2) | |
62 | { | |
63 | /* | |
64 | ** If * c2 is passed as * c1 | |
65 | ** Comparison is slightly different since it is safe to pass int as long, | |
66 | ** but not to pass int * as long *! | |
67 | ** | |
68 | ** For deep comparisons, +relaxquals does not permit the long/int break. | |
69 | */ | |
70 | ||
71 | return cprim_closeEnoughAux (c1, c2, TRUE); | |
72 | } | |
73 | ||
74 | bool | |
75 | cprim_closeEnough (cprim c1, cprim c2) | |
76 | { | |
77 | return cprim_closeEnoughAux (c1, c2, FALSE); | |
78 | } | |
79 | ||
80 | static bool | |
81 | cprim_closeEnoughAux (cprim c1, cprim c2, bool deep) | |
82 | { | |
83 | if (c1 == c2) return TRUE; | |
84 | ||
85 | DPRINTF (("cprim close: %s / %s", cprim_unparse (c1), cprim_unparse (c2))); | |
86 | ||
87 | if (c1 == CTX_ANYINTEGRAL) | |
88 | { | |
89 | if (context_getFlag (FLG_MATCHANYINTEGRAL) | |
90 | || context_getFlag (FLG_IGNOREQUALS)) | |
91 | { | |
92 | return (cprim_isAnyInt (c2) | |
93 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
94 | } | |
95 | else if (context_getFlag (FLG_LONGINTEGRAL)) | |
96 | { | |
97 | return (cprim_closeEnough (CTX_LINT, c2)); | |
98 | } | |
99 | else if (context_getFlag (FLG_LONGUNSIGNEDINTEGRAL)) | |
100 | { | |
101 | return (cprim_closeEnough (CTX_ULINT, c2)); | |
102 | } | |
103 | else | |
104 | { | |
105 | return FALSE; | |
106 | } | |
107 | } | |
108 | ||
109 | if (c1 == CTX_UNSIGNEDINTEGRAL) | |
110 | { | |
111 | /* We allow signed ints to match any integral if matchanyintegral is set */ | |
112 | if (context_getFlag (FLG_MATCHANYINTEGRAL)) { | |
113 | return (cprim_isAnyInt (c2) | |
114 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
115 | } | |
116 | ||
117 | if (context_getFlag (FLG_IGNOREQUALS)) | |
118 | { | |
119 | if (context_getFlag (FLG_IGNORESIGNS)) | |
120 | { | |
121 | return (cprim_isAnyUnsignedInt (c2) | |
122 | || (cprim_isUnsignedChar (c2) && context_msgCharInt ())); | |
123 | } | |
124 | else | |
125 | { | |
126 | return (cprim_isAnyInt (c2) | |
127 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
128 | } | |
129 | } | |
130 | else if (context_getFlag (FLG_LONGUNSIGNEDUNSIGNEDINTEGRAL)) | |
131 | { | |
132 | return (cprim_closeEnough (CTX_ULINT, c2)); | |
133 | } | |
134 | else | |
135 | { | |
136 | return FALSE; | |
137 | } | |
138 | } | |
139 | ||
140 | if (c1 == CTX_SIGNEDINTEGRAL) | |
141 | { | |
142 | /* We allow signed ints to match any integral if matchanyintegral is set */ | |
143 | if (context_getFlag (FLG_MATCHANYINTEGRAL)) { | |
144 | return (cprim_isAnyInt (c2) | |
145 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
146 | } | |
147 | ||
148 | if (context_getFlag (FLG_IGNOREQUALS)) | |
149 | { | |
150 | return (cprim_isAnyInt (c2) | |
151 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
152 | } | |
153 | else if (context_getFlag (FLG_LONGSIGNEDINTEGRAL)) | |
154 | { | |
155 | return (cprim_closeEnough (CTX_LINT, c2)); | |
156 | } | |
157 | else | |
158 | { | |
159 | return FALSE; | |
160 | } | |
161 | } | |
162 | ||
163 | if (c2 == CTX_ANYINTEGRAL) | |
164 | { | |
165 | if (context_getFlag (FLG_MATCHANYINTEGRAL)) | |
166 | { | |
167 | return (cprim_isAnyInt (c1) | |
168 | || (cprim_isAnyChar (c1) && context_msgCharInt ())); | |
169 | } | |
170 | else if (context_getFlag (FLG_LONGINTEGRAL)) | |
171 | { | |
172 | return (cprim_closeEnough (c1, CTX_LINT)); | |
173 | } | |
174 | else if (context_getFlag (FLG_LONGUNSIGNEDINTEGRAL)) | |
175 | { | |
176 | return (cprim_closeEnough (c1, CTX_ULINT)); | |
177 | } | |
178 | else | |
179 | { | |
180 | return FALSE; | |
181 | } | |
182 | } | |
183 | ||
184 | if (c2 == CTX_UNSIGNEDINTEGRAL) | |
185 | { | |
186 | if (context_getFlag (FLG_MATCHANYINTEGRAL)) | |
187 | { | |
188 | return (cprim_isAnyInt (c1) | |
189 | || (cprim_isAnyChar (c1) && context_msgCharInt ())); | |
190 | } | |
191 | else if (context_getFlag (FLG_LONGUNSIGNEDUNSIGNEDINTEGRAL)) | |
192 | { | |
193 | return (cprim_closeEnough (c1, CTX_ULINT)); | |
194 | } | |
195 | else | |
196 | { | |
197 | return FALSE; | |
198 | } | |
199 | } | |
200 | ||
201 | if (c2 == CTX_SIGNEDINTEGRAL) | |
202 | { | |
203 | if (context_getFlag (FLG_MATCHANYINTEGRAL)) | |
204 | { | |
205 | return (cprim_isAnyInt (c2) | |
206 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
207 | } | |
208 | else if (context_getFlag (FLG_LONGSIGNEDINTEGRAL)) | |
209 | { | |
210 | return (cprim_closeEnough (c1, CTX_LINT)); | |
211 | } | |
212 | else | |
213 | { | |
214 | return FALSE; | |
215 | } | |
216 | } | |
217 | ||
218 | ||
219 | DPRINTF (("cprim close: %s / %s", cprim_unparse (c1), cprim_unparse (c2))); | |
220 | ||
221 | if (context_getFlag (FLG_RELAXTYPES)) | |
222 | { | |
223 | if (cprim_isNumeric (c1) && cprim_isNumeric (c2)) return TRUE; | |
224 | } | |
225 | ||
226 | if (context_getFlag (FLG_IGNOREQUALS)) | |
227 | { | |
228 | switch (c1) | |
229 | { | |
230 | case CTX_CHAR: | |
231 | case CTX_UCHAR: | |
232 | if (cprim_isAnyChar (c2) | |
233 | || (cprim_isAnyInt (c2) && (context_msgCharInt ()))) { | |
234 | return TRUE; | |
235 | } | |
236 | break; | |
237 | case CTX_DOUBLE: | |
238 | case CTX_FLOAT: | |
239 | case CTX_LDOUBLE: | |
240 | if (c2 == CTX_DOUBLE || c2 == CTX_FLOAT || c2 == CTX_LDOUBLE) { | |
241 | return TRUE; | |
242 | } | |
243 | break; | |
244 | case CTX_INT: | |
245 | case CTX_LINT: | |
246 | case CTX_LLINT: | |
247 | case CTX_ULLINT: | |
248 | case CTX_SINT: | |
249 | case CTX_UINT: | |
250 | case CTX_ULINT: | |
251 | case CTX_USINT: | |
252 | if (cprim_isAnyInt (c2) | |
253 | || (cprim_isAnyChar (c2) && context_msgCharInt ())) { | |
254 | return TRUE; | |
255 | } | |
256 | /*@fallthrough@*/ | |
257 | default: | |
258 | ; | |
259 | } | |
260 | } | |
261 | ||
262 | if (context_getFlag (FLG_IGNORESIGNS)) | |
263 | { | |
264 | if (c1 == CTX_UCHAR) | |
265 | { | |
266 | c1 = CTX_CHAR; | |
267 | } | |
268 | else if (c1 == CTX_UINT) | |
269 | { | |
270 | c1 = CTX_INT; | |
271 | } | |
272 | else if (c1 == CTX_ULINT) | |
273 | { | |
274 | c1 = CTX_LINT; | |
275 | } | |
276 | /* 2001-06-10: This fix provided by Jim Zelenka: */ | |
277 | else if (c1 == CTX_ULLINT) | |
278 | { | |
279 | c1 = CTX_LLINT; | |
280 | } | |
281 | /* End fix */ | |
282 | else if (c1 == CTX_USINT) | |
283 | { | |
284 | c1 = CTX_SINT; | |
285 | } | |
286 | else | |
287 | { | |
288 | ; | |
289 | } | |
290 | ||
291 | if (c2 == CTX_UCHAR) | |
292 | { | |
293 | c2 = CTX_CHAR; | |
294 | } | |
295 | else if (c2 == CTX_UINT) | |
296 | { | |
297 | c2 = CTX_INT; | |
298 | } | |
299 | else if (c2 == CTX_ULINT) | |
300 | { | |
301 | c2 = CTX_LINT; | |
302 | } | |
303 | /* 2001-06-10: This fix provided by Jim Zelenka: */ | |
304 | else if (c2 == CTX_ULLINT) | |
305 | { | |
306 | c2 = CTX_LLINT; | |
307 | } | |
308 | /* End fix */ | |
309 | else if (c2 == CTX_USINT) | |
310 | { | |
311 | c2 = CTX_SINT; | |
312 | } | |
313 | else | |
314 | { | |
315 | ; | |
316 | } | |
317 | } | |
318 | ||
319 | if (c1 == c2) return TRUE; | |
320 | ||
321 | if (context_getFlag (FLG_FLOATDOUBLE)) | |
322 | { | |
323 | if (c1 == CTX_FLOAT && c2 == CTX_DOUBLE) | |
324 | { | |
325 | return TRUE; | |
326 | } | |
327 | if (c2 == CTX_FLOAT && c1 == CTX_DOUBLE) | |
328 | { | |
329 | return TRUE; | |
330 | } | |
331 | } | |
332 | ||
333 | DPRINTF (("cprim close: %s / %s", cprim_unparse (c1), cprim_unparse (c2))); | |
334 | ||
335 | if (!deep && context_getFlag (FLG_RELAXQUALS)) | |
336 | { | |
337 | switch (c1) | |
338 | { | |
339 | case CTX_DOUBLE: | |
340 | return (c2 == CTX_FLOAT); | |
341 | case CTX_LDOUBLE: | |
342 | return (c2 == CTX_DOUBLE || c2 == CTX_FLOAT); | |
343 | case CTX_SINT: | |
344 | return ((c2 == CTX_CHAR && context_msgCharInt ()) | |
345 | || (c2 == CTX_INT && context_msgShortInt ()) | |
346 | || (c2 == CTX_LINT && context_msgShortInt () && context_msgLongInt ())); | |
347 | ||
348 | case CTX_INT: | |
349 | return ((c2 == CTX_SINT | |
350 | || (cprim_isAnyChar (c2) && context_msgCharInt ()) | |
351 | || (c2 == CTX_LINT && context_msgLongInt ()))); | |
352 | ||
353 | case CTX_LLINT: | |
354 | return (c2 == CTX_SINT | |
355 | || c2 == CTX_INT | |
356 | || c2 == CTX_LINT | |
357 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
358 | case CTX_ULLINT: | |
359 | return (c2 == CTX_USINT | |
360 | || c2 == CTX_UINT | |
361 | || c2 == CTX_ULINT | |
362 | /* 2001-06-10: This fix provided by Jim Zelenka: */ | |
363 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
364 | case CTX_LINT: | |
365 | return (c2 == CTX_SINT | |
366 | || c2 == CTX_INT | |
367 | || (cprim_isAnyChar (c2) && context_msgCharInt ())); | |
368 | case CTX_UINT: | |
369 | return (c2 == CTX_USINT | |
370 | || (c2 == CTX_UCHAR && context_msgCharInt ())); | |
371 | case CTX_USINT: | |
372 | return (c2 == CTX_UCHAR && context_msgCharInt ()); | |
373 | case CTX_ULINT: | |
374 | /* 2001-06-10: This fix provided by Jim Zelenka: */ | |
375 | return (c2 == CTX_UINT || c2 == CTX_USINT | |
376 | || (c2 == CTX_UCHAR && context_msgCharInt())); | |
377 | case CTX_UCHAR: | |
378 | return (c2 == CTX_UINT && context_msgCharInt ()); | |
379 | case CTX_CHAR: | |
380 | return ((c2 == CTX_INT || c2 == CTX_SINT) | |
381 | && context_msgCharInt ()); | |
382 | default: | |
383 | return FALSE; | |
384 | } | |
385 | } | |
386 | else | |
387 | { | |
388 | switch (c1) | |
389 | { | |
390 | case CTX_DOUBLE: | |
391 | case CTX_LDOUBLE: | |
392 | return FALSE; | |
393 | case CTX_SINT: | |
394 | if (c2 == CTX_INT && context_msgShortInt ()) { | |
395 | return TRUE; | |
396 | } | |
397 | /*@fallthrough@*/ | |
398 | case CTX_INT: | |
399 | if (c2 == CTX_INT && context_msgLongInt ()) { | |
400 | return TRUE; | |
401 | } | |
402 | ||
403 | if (c2 == CTX_SINT && context_msgShortInt ()) { | |
404 | return TRUE; | |
405 | } | |
406 | /*@fallthrough@*/ | |
407 | case CTX_LINT: | |
408 | if (c2 == CTX_INT && context_msgLongInt ()) { | |
409 | return TRUE; | |
410 | } | |
411 | /*@fallthrough@*/ | |
412 | case CTX_LLINT: | |
413 | return (c2 == CTX_CHAR && context_msgCharInt ()); | |
414 | case CTX_UINT: | |
415 | case CTX_USINT: | |
416 | case CTX_ULINT: | |
417 | case CTX_ULLINT: | |
418 | return (c2 == CTX_UCHAR && context_msgCharInt ()); | |
419 | case CTX_UCHAR: | |
420 | return (c2 == CTX_UINT && context_msgCharInt ()); | |
421 | case CTX_CHAR: | |
422 | return ((c2 == CTX_INT || c2 == CTX_SINT) | |
423 | && context_msgCharInt ()); | |
424 | default: | |
425 | return FALSE; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | /*@only@*/ cstring | |
431 | cprim_unparse (cprim c) | |
432 | { | |
433 | switch (c) | |
434 | { | |
435 | case CTX_UNKNOWN: | |
436 | return cstring_makeLiteral ("-"); | |
437 | case CTX_VOID: | |
438 | return cstring_makeLiteral ("void"); | |
439 | case CTX_CHAR: | |
440 | return cstring_makeLiteral ("char"); | |
441 | case CTX_UCHAR: | |
442 | return cstring_makeLiteral ("unsigned char"); | |
443 | case CTX_DOUBLE: | |
444 | return cstring_makeLiteral ("double"); | |
445 | case CTX_LDOUBLE: | |
446 | return cstring_makeLiteral ("long double"); | |
447 | case CTX_FLOAT: | |
448 | return cstring_makeLiteral ("float"); | |
449 | case CTX_INT: | |
450 | return cstring_makeLiteral ("int"); | |
451 | case CTX_LINT: | |
452 | return cstring_makeLiteral ("long int"); | |
453 | case CTX_LLINT: | |
454 | return cstring_makeLiteral ("long long"); | |
455 | case CTX_ULLINT: | |
456 | return cstring_makeLiteral ("unsigned long long"); | |
457 | case CTX_SINT: | |
458 | return cstring_makeLiteral ("short int"); | |
459 | case CTX_UINT: | |
460 | return cstring_makeLiteral ("unsigned int"); | |
461 | case CTX_ULINT: | |
462 | return cstring_makeLiteral ("unsigned long int"); | |
463 | case CTX_USINT: | |
464 | return cstring_makeLiteral ("unsigned short int"); | |
465 | case CTX_UNSIGNEDINTEGRAL: | |
466 | return cstring_makeLiteral ("arbitrary unsigned integral type"); | |
467 | case CTX_SIGNEDINTEGRAL: | |
468 | return cstring_makeLiteral ("arbitrary signed integral type"); | |
469 | case CTX_ANYINTEGRAL: | |
470 | return cstring_makeLiteral ("arbitrary integral type"); | |
471 | default: | |
472 | return cstring_makeLiteral ("unknown prim"); | |
473 | } | |
474 | } | |
475 | ||
476 | bool cprim_isInt (cprim c) | |
477 | { | |
478 | return (cprim_isAnyInt (c) | |
479 | || (cprim_isAnyChar (c) && context_msgCharInt ())); | |
480 | } | |
481 | ||
482 | int cprim_getExpectedBits (cprim c) | |
483 | { | |
484 | /* Any basis to these numbers? Just guesses for now..., check ISO spec */ | |
485 | switch (c) | |
486 | { | |
487 | case CTX_UNKNOWN: | |
488 | return 0; | |
489 | case CTX_VOID: | |
490 | return 0; | |
491 | case CTX_CHAR: | |
492 | return 8; | |
493 | case CTX_UCHAR: | |
494 | return 8; | |
495 | case CTX_DOUBLE: | |
496 | return 64; | |
497 | case CTX_LDOUBLE: | |
498 | return 128; | |
499 | case CTX_FLOAT: | |
500 | return 32; | |
501 | case CTX_INT: | |
502 | return 32; | |
503 | case CTX_LINT: | |
504 | return 64; | |
505 | case CTX_LLINT: | |
506 | return 128; | |
507 | case CTX_ULLINT: | |
508 | return 128; | |
509 | case CTX_SINT: | |
510 | return 8; | |
511 | case CTX_UINT: | |
512 | return 32; | |
513 | case CTX_ULINT: | |
514 | return 64; | |
515 | case CTX_USINT: | |
516 | return 8; | |
517 | case CTX_UNSIGNEDINTEGRAL: | |
518 | return 64; | |
519 | case CTX_SIGNEDINTEGRAL: | |
520 | return 64; | |
521 | case CTX_ANYINTEGRAL: | |
522 | return 64; | |
523 | default: | |
524 | return 0; | |
525 | } | |
526 | } |