Line data Source code
1 : /*--------------------------------------------------------------------------
2 : *
3 : * test_regex.c
4 : * Test harness for the regular expression package.
5 : *
6 : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
7 : * Portions Copyright (c) 1994, Regents of the University of California
8 : *
9 : * IDENTIFICATION
10 : * src/test/modules/test_regex/test_regex.c
11 : *
12 : * -------------------------------------------------------------------------
13 : */
14 :
15 : #include "postgres.h"
16 :
17 : #include "funcapi.h"
18 : #include "regex/regex.h"
19 : #include "utils/array.h"
20 : #include "utils/builtins.h"
21 :
22 0 : PG_MODULE_MAGIC;
23 :
24 :
25 : /* all the options of interest for regex functions */
26 : typedef struct test_re_flags
27 : {
28 : int cflags; /* compile flags for Spencer's regex code */
29 : int eflags; /* execute flags for Spencer's regex code */
30 : long info; /* expected re_info bits */
31 : bool glob; /* do it globally (for each occurrence) */
32 : bool indices; /* report indices not actual strings */
33 : bool partial; /* expect partial match */
34 : } test_re_flags;
35 :
36 : /* cross-call state for test_regex() */
37 : typedef struct test_regex_ctx
38 : {
39 : test_re_flags re_flags; /* flags */
40 : rm_detail_t details; /* "details" from execution */
41 : text *orig_str; /* data string in original TEXT form */
42 : int nmatches; /* number of places where pattern matched */
43 : int npatterns; /* number of capturing subpatterns */
44 : /* We store start char index and end+1 char index for each match */
45 : /* so the number of entries in match_locs is nmatches * npatterns * 2 */
46 : int *match_locs; /* 0-based character indexes */
47 : int next_match; /* 0-based index of next match to process */
48 : /* workspace for build_test_match_result() */
49 : Datum *elems; /* has npatterns+1 elements */
50 : bool *nulls; /* has npatterns+1 elements */
51 : pg_wchar *wide_str; /* wide-char version of original string */
52 : char *conv_buf; /* conversion buffer, if needed */
53 : int conv_bufsiz; /* size thereof */
54 : } test_regex_ctx;
55 :
56 : /* Local functions */
57 : static void test_re_compile(text *text_re, int cflags, Oid collation,
58 : regex_t *result_re);
59 : static void parse_test_flags(test_re_flags *flags, text *opts);
60 : static test_regex_ctx *setup_test_matches(text *orig_str,
61 : regex_t *cpattern,
62 : test_re_flags *re_flags,
63 : Oid collation,
64 : bool use_subpatterns);
65 : static ArrayType *build_test_info_result(regex_t *cpattern,
66 : test_re_flags *flags);
67 : static ArrayType *build_test_match_result(test_regex_ctx *matchctx);
68 :
69 :
70 : /*
71 : * test_regex(pattern text, string text, flags text) returns setof text[]
72 : *
73 : * This is largely based on regexp.c's regexp_matches, with additions
74 : * for debugging purposes.
75 : */
76 0 : PG_FUNCTION_INFO_V1(test_regex);
77 :
78 : Datum
79 0 : test_regex(PG_FUNCTION_ARGS)
80 : {
81 0 : FuncCallContext *funcctx;
82 0 : test_regex_ctx *matchctx;
83 0 : ArrayType *result_ary;
84 :
85 0 : if (SRF_IS_FIRSTCALL())
86 : {
87 0 : text *pattern = PG_GETARG_TEXT_PP(0);
88 0 : text *flags = PG_GETARG_TEXT_PP(2);
89 0 : Oid collation = PG_GET_COLLATION();
90 0 : test_re_flags re_flags;
91 0 : regex_t cpattern;
92 0 : MemoryContext oldcontext;
93 :
94 0 : funcctx = SRF_FIRSTCALL_INIT();
95 0 : oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
96 :
97 : /* Determine options */
98 0 : parse_test_flags(&re_flags, flags);
99 :
100 : /* set up the compiled pattern */
101 0 : test_re_compile(pattern, re_flags.cflags, collation, &cpattern);
102 :
103 : /* be sure to copy the input string into the multi-call ctx */
104 0 : matchctx = setup_test_matches(PG_GETARG_TEXT_P_COPY(1), &cpattern,
105 : &re_flags,
106 0 : collation,
107 : true);
108 :
109 : /* Pre-create workspace that build_test_match_result needs */
110 0 : matchctx->elems = palloc_array(Datum, matchctx->npatterns + 1);
111 0 : matchctx->nulls = palloc_array(bool, matchctx->npatterns + 1);
112 :
113 0 : MemoryContextSwitchTo(oldcontext);
114 0 : funcctx->user_fctx = matchctx;
115 :
116 : /*
117 : * Return the first result row, which is info equivalent to Tcl's
118 : * "regexp -about" output
119 : */
120 0 : result_ary = build_test_info_result(&cpattern, &re_flags);
121 :
122 0 : pg_regfree(&cpattern);
123 :
124 0 : SRF_RETURN_NEXT(funcctx, PointerGetDatum(result_ary));
125 0 : }
126 : else
127 : {
128 : /* Each subsequent row describes one match */
129 0 : funcctx = SRF_PERCALL_SETUP();
130 0 : matchctx = (test_regex_ctx *) funcctx->user_fctx;
131 :
132 0 : if (matchctx->next_match < matchctx->nmatches)
133 : {
134 0 : result_ary = build_test_match_result(matchctx);
135 0 : matchctx->next_match++;
136 0 : SRF_RETURN_NEXT(funcctx, PointerGetDatum(result_ary));
137 0 : }
138 : }
139 :
140 0 : SRF_RETURN_DONE(funcctx);
141 0 : }
142 :
143 :
144 : /*
145 : * test_re_compile - compile a RE
146 : *
147 : * text_re --- the pattern, expressed as a TEXT object
148 : * cflags --- compile options for the pattern
149 : * collation --- collation to use for LC_CTYPE-dependent behavior
150 : * result_re --- output, compiled RE is stored here
151 : *
152 : * Pattern is given in the database encoding. We internally convert to
153 : * an array of pg_wchar, which is what Spencer's regex package wants.
154 : *
155 : * Caller must eventually pg_regfree the resulting RE to avoid memory leaks.
156 : */
157 : static void
158 0 : test_re_compile(text *text_re, int cflags, Oid collation,
159 : regex_t *result_re)
160 : {
161 0 : int text_re_len = VARSIZE_ANY_EXHDR(text_re);
162 0 : char *text_re_val = VARDATA_ANY(text_re);
163 0 : pg_wchar *pattern;
164 0 : int pattern_len;
165 0 : int regcomp_result;
166 0 : char errMsg[100];
167 :
168 : /* Convert pattern string to wide characters */
169 0 : pattern = (pg_wchar *) palloc((text_re_len + 1) * sizeof(pg_wchar));
170 0 : pattern_len = pg_mb2wchar_with_len(text_re_val,
171 0 : pattern,
172 0 : text_re_len);
173 :
174 0 : regcomp_result = pg_regcomp(result_re,
175 0 : pattern,
176 0 : pattern_len,
177 0 : cflags,
178 0 : collation);
179 :
180 0 : pfree(pattern);
181 :
182 0 : if (regcomp_result != REG_OKAY)
183 : {
184 : /* re didn't compile (no need for pg_regfree, if so) */
185 0 : pg_regerror(regcomp_result, result_re, errMsg, sizeof(errMsg));
186 0 : ereport(ERROR,
187 : (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
188 : errmsg("invalid regular expression: %s", errMsg)));
189 0 : }
190 0 : }
191 :
192 : /*
193 : * test_re_execute - execute a RE on pg_wchar data
194 : *
195 : * Returns true on match, false on no match
196 : * Arguments are as for pg_regexec
197 : */
198 : static bool
199 0 : test_re_execute(regex_t *re, pg_wchar *data, int data_len,
200 : int start_search,
201 : rm_detail_t *details,
202 : int nmatch, regmatch_t *pmatch,
203 : int eflags)
204 : {
205 0 : int regexec_result;
206 0 : char errMsg[100];
207 :
208 : /* Initialize match locations in case engine doesn't */
209 0 : details->rm_extend.rm_so = -1;
210 0 : details->rm_extend.rm_eo = -1;
211 0 : for (int i = 0; i < nmatch; i++)
212 : {
213 0 : pmatch[i].rm_so = -1;
214 0 : pmatch[i].rm_eo = -1;
215 0 : }
216 :
217 : /* Perform RE match and return result */
218 0 : regexec_result = pg_regexec(re,
219 0 : data,
220 0 : data_len,
221 0 : start_search,
222 0 : details,
223 0 : nmatch,
224 0 : pmatch,
225 0 : eflags);
226 :
227 0 : if (regexec_result != REG_OKAY && regexec_result != REG_NOMATCH)
228 : {
229 : /* re failed??? */
230 0 : pg_regerror(regexec_result, re, errMsg, sizeof(errMsg));
231 0 : ereport(ERROR,
232 : (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
233 : errmsg("regular expression failed: %s", errMsg)));
234 0 : }
235 :
236 0 : return (regexec_result == REG_OKAY);
237 0 : }
238 :
239 :
240 : /*
241 : * parse_test_flags - parse the flags argument
242 : *
243 : * flags --- output argument, filled with desired options
244 : * opts --- TEXT object, or NULL for defaults
245 : */
246 : static void
247 0 : parse_test_flags(test_re_flags *flags, text *opts)
248 : {
249 : /* these defaults must match Tcl's */
250 0 : int cflags = REG_ADVANCED;
251 0 : int eflags = 0;
252 0 : long info = 0;
253 :
254 0 : flags->glob = false;
255 0 : flags->indices = false;
256 0 : flags->partial = false;
257 :
258 0 : if (opts)
259 : {
260 0 : char *opt_p = VARDATA_ANY(opts);
261 0 : int opt_len = VARSIZE_ANY_EXHDR(opts);
262 0 : int i;
263 :
264 0 : for (i = 0; i < opt_len; i++)
265 : {
266 0 : switch (opt_p[i])
267 : {
268 : case '-':
269 : /* allowed, no-op */
270 : break;
271 : case '!':
272 0 : flags->partial = true;
273 0 : break;
274 : case '*':
275 : /* test requires Unicode --- ignored here */
276 : break;
277 : case '0':
278 0 : flags->indices = true;
279 0 : break;
280 :
281 : /* These flags correspond to user-exposed RE options: */
282 : case 'g': /* global match */
283 0 : flags->glob = true;
284 0 : break;
285 : case 'i': /* case insensitive */
286 0 : cflags |= REG_ICASE;
287 0 : break;
288 : case 'n': /* \n affects ^ $ . [^ */
289 0 : cflags |= REG_NEWLINE;
290 0 : break;
291 : case 'p': /* ~Perl, \n affects . [^ */
292 0 : cflags |= REG_NLSTOP;
293 0 : cflags &= ~REG_NLANCH;
294 0 : break;
295 : case 'w': /* weird, \n affects ^ $ only */
296 0 : cflags &= ~REG_NLSTOP;
297 0 : cflags |= REG_NLANCH;
298 0 : break;
299 : case 'x': /* expanded syntax */
300 0 : cflags |= REG_EXPANDED;
301 0 : break;
302 :
303 : /* These flags correspond to Tcl's -xflags options: */
304 : case 'a':
305 0 : cflags |= REG_ADVF;
306 0 : break;
307 : case 'b':
308 0 : cflags &= ~REG_ADVANCED;
309 0 : break;
310 : case 'c':
311 :
312 : /*
313 : * Tcl calls this TCL_REG_CANMATCH, but it's really
314 : * REG_EXPECT. In this implementation we must also set
315 : * the partial and indices flags, so that
316 : * setup_test_matches and build_test_match_result will
317 : * emit the desired data. (They'll emit more fields than
318 : * Tcl would, but that's fine.)
319 : */
320 0 : cflags |= REG_EXPECT;
321 0 : flags->partial = true;
322 0 : flags->indices = true;
323 0 : break;
324 : case 'e':
325 0 : cflags &= ~REG_ADVANCED;
326 0 : cflags |= REG_EXTENDED;
327 0 : break;
328 : case 'q':
329 0 : cflags &= ~REG_ADVANCED;
330 0 : cflags |= REG_QUOTE;
331 0 : break;
332 : case 'o': /* o for opaque */
333 0 : cflags |= REG_NOSUB;
334 0 : break;
335 : case 's': /* s for start */
336 0 : cflags |= REG_BOSONLY;
337 0 : break;
338 : case '+':
339 0 : cflags |= REG_FAKE;
340 0 : break;
341 : case ',':
342 0 : cflags |= REG_PROGRESS;
343 0 : break;
344 : case '.':
345 0 : cflags |= REG_DUMP;
346 0 : break;
347 : case ':':
348 0 : eflags |= REG_MTRACE;
349 0 : break;
350 : case ';':
351 0 : eflags |= REG_FTRACE;
352 0 : break;
353 : case '^':
354 0 : eflags |= REG_NOTBOL;
355 0 : break;
356 : case '$':
357 0 : eflags |= REG_NOTEOL;
358 0 : break;
359 : case 't':
360 0 : cflags |= REG_EXPECT;
361 0 : break;
362 : case '%':
363 0 : eflags |= REG_SMALL;
364 0 : break;
365 :
366 : /* These flags define expected info bits: */
367 : case 'A':
368 0 : info |= REG_UBSALNUM;
369 0 : break;
370 : case 'B':
371 0 : info |= REG_UBRACES;
372 0 : break;
373 : case 'E':
374 0 : info |= REG_UBBS;
375 0 : break;
376 : case 'H':
377 0 : info |= REG_ULOOKAROUND;
378 0 : break;
379 : case 'I':
380 0 : info |= REG_UIMPOSSIBLE;
381 0 : break;
382 : case 'L':
383 0 : info |= REG_ULOCALE;
384 0 : break;
385 : case 'M':
386 0 : info |= REG_UUNPORT;
387 0 : break;
388 : case 'N':
389 0 : info |= REG_UEMPTYMATCH;
390 0 : break;
391 : case 'P':
392 0 : info |= REG_UNONPOSIX;
393 0 : break;
394 : case 'Q':
395 0 : info |= REG_UBOUNDS;
396 0 : break;
397 : case 'R':
398 0 : info |= REG_UBACKREF;
399 0 : break;
400 : case 'S':
401 0 : info |= REG_UUNSPEC;
402 0 : break;
403 : case 'T':
404 0 : info |= REG_USHORTEST;
405 0 : break;
406 : case 'U':
407 0 : info |= REG_UPBOTCH;
408 0 : break;
409 :
410 : default:
411 0 : ereport(ERROR,
412 : (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
413 : errmsg("invalid regular expression test option: \"%.*s\"",
414 : pg_mblen(opt_p + i), opt_p + i)));
415 0 : break;
416 : }
417 0 : }
418 0 : }
419 0 : flags->cflags = cflags;
420 0 : flags->eflags = eflags;
421 0 : flags->info = info;
422 0 : }
423 :
424 : /*
425 : * setup_test_matches --- do the initial matching
426 : *
427 : * To simplify memory management, we do all the matching in one swoop.
428 : * The returned test_regex_ctx contains the locations of all the substrings
429 : * matching the pattern.
430 : */
431 : static test_regex_ctx *
432 0 : setup_test_matches(text *orig_str,
433 : regex_t *cpattern, test_re_flags *re_flags,
434 : Oid collation,
435 : bool use_subpatterns)
436 : {
437 0 : test_regex_ctx *matchctx = palloc0_object(test_regex_ctx);
438 0 : int eml = pg_database_encoding_max_length();
439 0 : int orig_len;
440 0 : pg_wchar *wide_str;
441 0 : int wide_len;
442 0 : regmatch_t *pmatch;
443 0 : int pmatch_len;
444 0 : int array_len;
445 0 : int array_idx;
446 0 : int prev_match_end;
447 0 : int start_search;
448 0 : int maxlen = 0; /* largest fetch length in characters */
449 :
450 : /* save flags */
451 0 : matchctx->re_flags = *re_flags;
452 :
453 : /* save original string --- we'll extract result substrings from it */
454 0 : matchctx->orig_str = orig_str;
455 :
456 : /* convert string to pg_wchar form for matching */
457 0 : orig_len = VARSIZE_ANY_EXHDR(orig_str);
458 0 : wide_str = palloc_array(pg_wchar, orig_len + 1);
459 0 : wide_len = pg_mb2wchar_with_len(VARDATA_ANY(orig_str), wide_str, orig_len);
460 :
461 : /* do we want to remember subpatterns? */
462 0 : if (use_subpatterns && cpattern->re_nsub > 0)
463 : {
464 0 : matchctx->npatterns = cpattern->re_nsub + 1;
465 0 : pmatch_len = cpattern->re_nsub + 1;
466 0 : }
467 : else
468 : {
469 0 : use_subpatterns = false;
470 0 : matchctx->npatterns = 1;
471 0 : pmatch_len = 1;
472 : }
473 :
474 : /* temporary output space for RE package */
475 0 : pmatch = palloc_array(regmatch_t, pmatch_len);
476 :
477 : /*
478 : * the real output space (grown dynamically if needed)
479 : *
480 : * use values 2^n-1, not 2^n, so that we hit the limit at 2^28-1 rather
481 : * than at 2^27
482 : */
483 0 : array_len = re_flags->glob ? 255 : 31;
484 0 : matchctx->match_locs = palloc_array(int, array_len);
485 0 : array_idx = 0;
486 :
487 : /* search for the pattern, perhaps repeatedly */
488 0 : prev_match_end = 0;
489 0 : start_search = 0;
490 0 : while (test_re_execute(cpattern, wide_str, wide_len,
491 0 : start_search,
492 0 : &matchctx->details,
493 0 : pmatch_len, pmatch,
494 0 : re_flags->eflags))
495 : {
496 : /* enlarge output space if needed */
497 0 : while (array_idx + matchctx->npatterns * 2 + 1 > array_len)
498 : {
499 0 : array_len += array_len + 1; /* 2^n-1 => 2^(n+1)-1 */
500 0 : if (array_len > MaxAllocSize / sizeof(int))
501 0 : ereport(ERROR,
502 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
503 : errmsg("too many regular expression matches")));
504 0 : matchctx->match_locs = (int *) repalloc(matchctx->match_locs,
505 0 : sizeof(int) * array_len);
506 : }
507 :
508 : /* save this match's locations */
509 0 : for (int i = 0; i < matchctx->npatterns; i++)
510 : {
511 0 : int so = pmatch[i].rm_so;
512 0 : int eo = pmatch[i].rm_eo;
513 :
514 0 : matchctx->match_locs[array_idx++] = so;
515 0 : matchctx->match_locs[array_idx++] = eo;
516 0 : if (so >= 0 && eo >= 0 && (eo - so) > maxlen)
517 0 : maxlen = (eo - so);
518 0 : }
519 0 : matchctx->nmatches++;
520 0 : prev_match_end = pmatch[0].rm_eo;
521 :
522 : /* if not glob, stop after one match */
523 0 : if (!re_flags->glob)
524 0 : break;
525 :
526 : /*
527 : * Advance search position. Normally we start the next search at the
528 : * end of the previous match; but if the match was of zero length, we
529 : * have to advance by one character, or we'd just find the same match
530 : * again.
531 : */
532 0 : start_search = prev_match_end;
533 0 : if (pmatch[0].rm_so == pmatch[0].rm_eo)
534 0 : start_search++;
535 0 : if (start_search > wide_len)
536 0 : break;
537 : }
538 :
539 : /*
540 : * If we had no match, but "partial" and "indices" are set, emit the
541 : * details.
542 : */
543 0 : if (matchctx->nmatches == 0 && re_flags->partial && re_flags->indices)
544 : {
545 : /* enlarge output space if needed */
546 0 : while (array_idx + matchctx->npatterns * 2 + 1 > array_len)
547 : {
548 0 : array_len += array_len + 1; /* 2^n-1 => 2^(n+1)-1 */
549 0 : if (array_len > MaxAllocSize / sizeof(int))
550 0 : ereport(ERROR,
551 : (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
552 : errmsg("too many regular expression matches")));
553 0 : matchctx->match_locs = (int *) repalloc(matchctx->match_locs,
554 0 : sizeof(int) * array_len);
555 : }
556 :
557 0 : matchctx->match_locs[array_idx++] = matchctx->details.rm_extend.rm_so;
558 0 : matchctx->match_locs[array_idx++] = matchctx->details.rm_extend.rm_eo;
559 : /* we don't have pmatch data, so emit -1 */
560 0 : for (int i = 1; i < matchctx->npatterns; i++)
561 : {
562 0 : matchctx->match_locs[array_idx++] = -1;
563 0 : matchctx->match_locs[array_idx++] = -1;
564 0 : }
565 0 : matchctx->nmatches++;
566 0 : }
567 :
568 0 : Assert(array_idx <= array_len);
569 :
570 0 : if (eml > 1)
571 : {
572 0 : int64 maxsiz = eml * (int64) maxlen;
573 0 : int conv_bufsiz;
574 :
575 : /*
576 : * Make the conversion buffer large enough for any substring of
577 : * interest.
578 : *
579 : * Worst case: assume we need the maximum size (maxlen*eml), but take
580 : * advantage of the fact that the original string length in bytes is
581 : * an upper bound on the byte length of any fetched substring (and we
582 : * know that len+1 is safe to allocate because the varlena header is
583 : * longer than 1 byte).
584 : */
585 0 : if (maxsiz > orig_len)
586 0 : conv_bufsiz = orig_len + 1;
587 : else
588 0 : conv_bufsiz = maxsiz + 1; /* safe since maxsiz < 2^30 */
589 :
590 0 : matchctx->conv_buf = palloc(conv_bufsiz);
591 0 : matchctx->conv_bufsiz = conv_bufsiz;
592 0 : matchctx->wide_str = wide_str;
593 0 : }
594 : else
595 : {
596 : /* No need to keep the wide string if we're in a single-byte charset. */
597 0 : pfree(wide_str);
598 0 : matchctx->wide_str = NULL;
599 0 : matchctx->conv_buf = NULL;
600 0 : matchctx->conv_bufsiz = 0;
601 : }
602 :
603 : /* Clean up temp storage */
604 0 : pfree(pmatch);
605 :
606 0 : return matchctx;
607 0 : }
608 :
609 : /*
610 : * build_test_info_result - build output array describing compiled regexp
611 : *
612 : * This borrows some code from Tcl's TclRegAbout().
613 : */
614 : static ArrayType *
615 0 : build_test_info_result(regex_t *cpattern, test_re_flags *flags)
616 : {
617 : /* Translation data for flag bits in regex_t.re_info */
618 : struct infoname
619 : {
620 : int bit;
621 : const char *text;
622 : };
623 : static const struct infoname infonames[] = {
624 : {REG_UBACKREF, "REG_UBACKREF"},
625 : {REG_ULOOKAROUND, "REG_ULOOKAROUND"},
626 : {REG_UBOUNDS, "REG_UBOUNDS"},
627 : {REG_UBRACES, "REG_UBRACES"},
628 : {REG_UBSALNUM, "REG_UBSALNUM"},
629 : {REG_UPBOTCH, "REG_UPBOTCH"},
630 : {REG_UBBS, "REG_UBBS"},
631 : {REG_UNONPOSIX, "REG_UNONPOSIX"},
632 : {REG_UUNSPEC, "REG_UUNSPEC"},
633 : {REG_UUNPORT, "REG_UUNPORT"},
634 : {REG_ULOCALE, "REG_ULOCALE"},
635 : {REG_UEMPTYMATCH, "REG_UEMPTYMATCH"},
636 : {REG_UIMPOSSIBLE, "REG_UIMPOSSIBLE"},
637 : {REG_USHORTEST, "REG_USHORTEST"},
638 : {0, NULL}
639 : };
640 0 : const struct infoname *inf;
641 0 : Datum elems[lengthof(infonames) + 1];
642 0 : int nresults = 0;
643 0 : char buf[80];
644 0 : int dims[1];
645 0 : int lbs[1];
646 :
647 : /* Set up results: first, the number of subexpressions */
648 0 : snprintf(buf, sizeof(buf), "%d", (int) cpattern->re_nsub);
649 0 : elems[nresults++] = PointerGetDatum(cstring_to_text(buf));
650 :
651 : /* Report individual info bit states */
652 0 : for (inf = infonames; inf->bit != 0; inf++)
653 : {
654 0 : if (cpattern->re_info & inf->bit)
655 : {
656 0 : if (flags->info & inf->bit)
657 0 : elems[nresults++] = PointerGetDatum(cstring_to_text(inf->text));
658 : else
659 : {
660 0 : snprintf(buf, sizeof(buf), "unexpected %s!", inf->text);
661 0 : elems[nresults++] = PointerGetDatum(cstring_to_text(buf));
662 : }
663 0 : }
664 : else
665 : {
666 0 : if (flags->info & inf->bit)
667 : {
668 0 : snprintf(buf, sizeof(buf), "missing %s!", inf->text);
669 0 : elems[nresults++] = PointerGetDatum(cstring_to_text(buf));
670 0 : }
671 : }
672 0 : }
673 :
674 : /* And form an array */
675 0 : dims[0] = nresults;
676 0 : lbs[0] = 1;
677 : /* XXX: this hardcodes assumptions about the text type */
678 0 : return construct_md_array(elems, NULL, 1, dims, lbs,
679 : TEXTOID, -1, false, TYPALIGN_INT);
680 0 : }
681 :
682 : /*
683 : * build_test_match_result - build output array for current match
684 : *
685 : * Note that if the indices flag is set, we don't need any strings,
686 : * just the location data.
687 : */
688 : static ArrayType *
689 0 : build_test_match_result(test_regex_ctx *matchctx)
690 : {
691 0 : char *buf = matchctx->conv_buf;
692 0 : Datum *elems = matchctx->elems;
693 0 : bool *nulls = matchctx->nulls;
694 0 : bool indices = matchctx->re_flags.indices;
695 0 : char bufstr[80];
696 0 : int dims[1];
697 0 : int lbs[1];
698 0 : int loc;
699 0 : int i;
700 :
701 : /* Extract matching substrings from the original string */
702 0 : loc = matchctx->next_match * matchctx->npatterns * 2;
703 0 : for (i = 0; i < matchctx->npatterns; i++)
704 : {
705 0 : int so = matchctx->match_locs[loc++];
706 0 : int eo = matchctx->match_locs[loc++];
707 :
708 0 : if (indices)
709 : {
710 : /* Report eo this way for consistency with Tcl */
711 0 : snprintf(bufstr, sizeof(bufstr), "%d %d",
712 0 : so, so < 0 ? eo : eo - 1);
713 0 : elems[i] = PointerGetDatum(cstring_to_text(bufstr));
714 0 : nulls[i] = false;
715 0 : }
716 0 : else if (so < 0 || eo < 0)
717 : {
718 0 : elems[i] = (Datum) 0;
719 0 : nulls[i] = true;
720 0 : }
721 0 : else if (buf)
722 : {
723 0 : int len = pg_wchar2mb_with_len(matchctx->wide_str + so,
724 0 : buf,
725 0 : eo - so);
726 :
727 0 : Assert(len < matchctx->conv_bufsiz);
728 0 : elems[i] = PointerGetDatum(cstring_to_text_with_len(buf, len));
729 0 : nulls[i] = false;
730 0 : }
731 : else
732 : {
733 0 : elems[i] = DirectFunctionCall3(text_substr,
734 : PointerGetDatum(matchctx->orig_str),
735 : Int32GetDatum(so + 1),
736 : Int32GetDatum(eo - so));
737 0 : nulls[i] = false;
738 : }
739 0 : }
740 :
741 : /* In EXPECT indices mode, also report the "details" */
742 0 : if (indices && (matchctx->re_flags.cflags & REG_EXPECT))
743 : {
744 0 : int so = matchctx->details.rm_extend.rm_so;
745 0 : int eo = matchctx->details.rm_extend.rm_eo;
746 :
747 0 : snprintf(bufstr, sizeof(bufstr), "%d %d",
748 0 : so, so < 0 ? eo : eo - 1);
749 0 : elems[i] = PointerGetDatum(cstring_to_text(bufstr));
750 0 : nulls[i] = false;
751 0 : i++;
752 0 : }
753 :
754 : /* And form an array */
755 0 : dims[0] = i;
756 0 : lbs[0] = 1;
757 : /* XXX: this hardcodes assumptions about the text type */
758 0 : return construct_md_array(elems, nulls, 1, dims, lbs,
759 : TEXTOID, -1, false, TYPALIGN_INT);
760 0 : }
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