1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | http://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Author: Ed Batutis <ed@batutis.com> |
14 +----------------------------------------------------------------------+
15 */
16
17 /* {{{ includes */
18 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include <php.h>
23 #include "grapheme.h"
24 #include "grapheme_util.h"
25
26 #include <unicode/utypes.h>
27 #include <unicode/ucol.h>
28 #include <unicode/ustring.h>
29 #include <unicode/ubrk.h>
30
31 #include "ext/standard/php_string.h"
32
33 /* }}} */
34
35 #define GRAPHEME_EXTRACT_TYPE_COUNT 0
36 #define GRAPHEME_EXTRACT_TYPE_MAXBYTES 1
37 #define GRAPHEME_EXTRACT_TYPE_MAXCHARS 2
38 #define GRAPHEME_EXTRACT_TYPE_MIN GRAPHEME_EXTRACT_TYPE_COUNT
39 #define GRAPHEME_EXTRACT_TYPE_MAX GRAPHEME_EXTRACT_TYPE_MAXCHARS
40
41
42 /* {{{ grapheme_register_constants
43 * Register API constants
44 */
grapheme_register_constants(INIT_FUNC_ARGS)45 void grapheme_register_constants( INIT_FUNC_ARGS )
46 {
47 REGISTER_LONG_CONSTANT("GRAPHEME_EXTR_COUNT", GRAPHEME_EXTRACT_TYPE_COUNT, CONST_CS | CONST_PERSISTENT);
48 REGISTER_LONG_CONSTANT("GRAPHEME_EXTR_MAXBYTES", GRAPHEME_EXTRACT_TYPE_MAXBYTES, CONST_CS | CONST_PERSISTENT);
49 REGISTER_LONG_CONSTANT("GRAPHEME_EXTR_MAXCHARS", GRAPHEME_EXTRACT_TYPE_MAXCHARS, CONST_CS | CONST_PERSISTENT);
50 }
51 /* }}} */
52
53 /* {{{ proto int grapheme_strlen(string str)
54 Get number of graphemes in a string */
PHP_FUNCTION(grapheme_strlen)55 PHP_FUNCTION(grapheme_strlen)
56 {
57 unsigned char* string;
58 int string_len;
59 UChar* ustring = NULL;
60 int ustring_len = 0;
61 int ret_len;
62 UErrorCode status;
63
64 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", (char **)&string, &string_len) == FAILURE) {
65
66 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
67 "grapheme_strlen: unable to parse input param", 0 TSRMLS_CC );
68
69 RETURN_FALSE;
70 }
71
72 ret_len = grapheme_ascii_check(string, string_len);
73
74 if ( ret_len >= 0 )
75 RETURN_LONG(ret_len);
76
77 /* convert the string to UTF-16. */
78 status = U_ZERO_ERROR;
79 intl_convert_utf8_to_utf16(&ustring, &ustring_len, (char*) string, string_len, &status );
80
81 if ( U_FAILURE( status ) ) {
82 /* Set global error code. */
83 intl_error_set_code( NULL, status TSRMLS_CC );
84
85 /* Set error messages. */
86 intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 0 TSRMLS_CC );
87 if (ustring) {
88 efree( ustring );
89 }
90 RETURN_NULL();
91 }
92
93 ret_len = grapheme_split_string(ustring, ustring_len, NULL, 0 TSRMLS_CC );
94
95 if (ustring) {
96 efree( ustring );
97 }
98
99 if (ret_len >= 0) {
100 RETVAL_LONG(ret_len);
101 } else {
102 RETVAL_FALSE;
103 }
104 }
105 /* }}} */
106
107 /* {{{ proto int grapheme_strpos(string haystack, string needle [, int offset ])
108 Find position of first occurrence of a string within another */
PHP_FUNCTION(grapheme_strpos)109 PHP_FUNCTION(grapheme_strpos)
110 {
111 unsigned char *haystack, *needle;
112 int haystack_len, needle_len;
113 unsigned char *found;
114 long loffset = 0;
115 int32_t offset = 0;
116 int ret_pos, uchar_pos;
117
118 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|l", (char **)&haystack, &haystack_len, (char **)&needle, &needle_len, &loffset) == FAILURE) {
119
120 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
121 "grapheme_strpos: unable to parse input param", 0 TSRMLS_CC );
122
123 RETURN_FALSE;
124 }
125
126 if ( OUTSIDE_STRING(loffset, haystack_len) ) {
127
128 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Offset not contained in string", 1 TSRMLS_CC );
129
130 RETURN_FALSE;
131 }
132
133 /* we checked that it will fit: */
134 offset = (int32_t) loffset;
135
136 /* the offset is 'grapheme count offset' so it still might be invalid - we'll check it later */
137
138 if (needle_len == 0) {
139
140 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Empty delimiter", 1 TSRMLS_CC );
141
142 RETURN_FALSE;
143 }
144
145
146 /* quick check to see if the string might be there
147 * I realize that 'offset' is 'grapheme count offset' but will work in spite of that
148 */
149 found = (unsigned char *)php_memnstr((char *)haystack + offset, (char *)needle, needle_len, (char *)haystack + haystack_len);
150
151 /* if it isn't there the we are done */
152 if (!found) {
153 RETURN_FALSE;
154 }
155
156 /* if it is there, and if the haystack is ascii, we are all done */
157 if ( grapheme_ascii_check(haystack, haystack_len) >= 0 ) {
158
159 RETURN_LONG(found - haystack);
160 }
161
162 /* do utf16 part of the strpos */
163 ret_pos = grapheme_strpos_utf16(haystack, haystack_len, needle, needle_len, offset, &uchar_pos, 0 /* fIgnoreCase */ TSRMLS_CC );
164
165 if ( ret_pos >= 0 ) {
166 RETURN_LONG(ret_pos + offset);
167 } else {
168 RETURN_FALSE;
169 }
170
171 }
172 /* }}} */
173
174 /* {{{ proto int grapheme_stripos(string haystack, string needle [, int offset ])
175 Find position of first occurrence of a string within another, ignoring case differences */
PHP_FUNCTION(grapheme_stripos)176 PHP_FUNCTION(grapheme_stripos)
177 {
178 unsigned char *haystack, *needle, *haystack_dup, *needle_dup;
179 int haystack_len, needle_len;
180 unsigned char *found;
181 long loffset = 0;
182 int32_t offset = 0;
183 int ret_pos, uchar_pos;
184 int is_ascii;
185
186 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|l", (char **)&haystack, &haystack_len, (char **)&needle, &needle_len, &loffset) == FAILURE) {
187
188 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
189 "grapheme_stripos: unable to parse input param", 0 TSRMLS_CC );
190
191 RETURN_FALSE;
192 }
193
194 if ( OUTSIDE_STRING(loffset, haystack_len) ) {
195
196 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_stripos: Offset not contained in string", 1 TSRMLS_CC );
197
198 RETURN_FALSE;
199 }
200
201 /* we checked that it will fit: */
202 offset = (int32_t) loffset;
203
204 /* the offset is 'grapheme count offset' so it still might be invalid - we'll check it later */
205
206 if (needle_len == 0) {
207
208 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_stripos: Empty delimiter", 1 TSRMLS_CC );
209
210 RETURN_FALSE;
211 }
212
213
214 is_ascii = ( grapheme_ascii_check(haystack, haystack_len) >= 0 );
215
216 if ( is_ascii ) {
217 needle_dup = (unsigned char *)estrndup((char *)needle, needle_len);
218 php_strtolower((char *)needle_dup, needle_len);
219 haystack_dup = (unsigned char *)estrndup((char *)haystack, haystack_len);
220 php_strtolower((char *)haystack_dup, haystack_len);
221
222 found = (unsigned char*) php_memnstr((char *)haystack_dup + offset, (char *)needle_dup, needle_len, (char *)haystack_dup + haystack_len);
223
224 efree(haystack_dup);
225 efree(needle_dup);
226
227 if (found) {
228 RETURN_LONG(found - haystack_dup);
229 }
230
231 /* if needle was ascii too, we are all done, otherwise we need to try using Unicode to see what we get */
232 if ( grapheme_ascii_check(needle, needle_len) >= 0 ) {
233 RETURN_FALSE;
234 }
235 }
236
237 /* do utf16 part of the strpos */
238 ret_pos = grapheme_strpos_utf16(haystack, haystack_len, needle, needle_len, offset, &uchar_pos, 1 /* fIgnoreCase */ TSRMLS_CC );
239
240 if ( ret_pos >= 0 ) {
241 RETURN_LONG(ret_pos + offset);
242 } else {
243 RETURN_FALSE;
244 }
245
246 }
247 /* }}} */
248
249 /* {{{ proto int grapheme_strrpos(string haystack, string needle [, int offset])
250 Find position of last occurrence of a string within another */
PHP_FUNCTION(grapheme_strrpos)251 PHP_FUNCTION(grapheme_strrpos)
252 {
253 unsigned char *haystack, *needle;
254 int haystack_len, needle_len;
255 long loffset = 0;
256 int32_t offset = 0;
257 int32_t ret_pos;
258 int is_ascii;
259
260 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|l", (char **)&haystack, &haystack_len, (char **)&needle, &needle_len, &loffset) == FAILURE) {
261
262 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
263 "grapheme_strrpos: unable to parse input param", 0 TSRMLS_CC );
264
265 RETURN_FALSE;
266 }
267
268 if ( OUTSIDE_STRING(loffset, haystack_len) ) {
269
270 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Offset not contained in string", 1 TSRMLS_CC );
271
272 RETURN_FALSE;
273 }
274
275 /* we checked that it will fit: */
276 offset = (int32_t) loffset;
277
278 /* the offset is 'grapheme count offset' so it still might be invalid - we'll check it later */
279
280 if (needle_len == 0) {
281
282 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Empty delimiter", 1 TSRMLS_CC );
283
284 RETURN_FALSE;
285 }
286
287 is_ascii = grapheme_ascii_check(haystack, haystack_len) >= 0;
288
289 if ( is_ascii ) {
290
291 ret_pos = grapheme_strrpos_ascii(haystack, haystack_len, needle, needle_len, offset);
292
293
294 if ( ret_pos >= 0 ) {
295 RETURN_LONG(ret_pos);
296 }
297
298 /* if the needle was ascii too, we are done */
299
300 if ( grapheme_ascii_check(needle, needle_len) >= 0 ) {
301 RETURN_FALSE;
302 }
303
304 /* else we need to continue via utf16 */
305 }
306
307 ret_pos = grapheme_strrpos_utf16(haystack, haystack_len, needle, needle_len, offset, 0 /* f_ignore_case */ TSRMLS_CC);
308
309 if ( ret_pos >= 0 ) {
310 RETURN_LONG(ret_pos);
311 } else {
312 RETURN_FALSE;
313 }
314
315
316 }
317 /* }}} */
318
319 /* {{{ proto int grapheme_strripos(string haystack, string needle [, int offset])
320 Find position of last occurrence of a string within another, ignoring case */
PHP_FUNCTION(grapheme_strripos)321 PHP_FUNCTION(grapheme_strripos)
322 {
323 unsigned char *haystack, *needle;
324 int haystack_len, needle_len;
325 long loffset = 0;
326 int32_t offset = 0;
327 int32_t ret_pos;
328 int is_ascii;
329
330 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|l", (char **)&haystack, &haystack_len, (char **)&needle, &needle_len, &loffset) == FAILURE) {
331
332 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
333 "grapheme_strrpos: unable to parse input param", 0 TSRMLS_CC );
334
335 RETURN_FALSE;
336 }
337
338 if ( OUTSIDE_STRING(loffset, haystack_len) ) {
339
340 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Offset not contained in string", 1 TSRMLS_CC );
341
342 RETURN_FALSE;
343 }
344
345 /* we checked that it will fit: */
346 offset = (int32_t) loffset;
347
348 /* the offset is 'grapheme count offset' so it still might be invalid - we'll check it later */
349
350 if (needle_len == 0) {
351
352 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Empty delimiter", 1 TSRMLS_CC );
353
354 RETURN_FALSE;
355 }
356
357 is_ascii = grapheme_ascii_check(haystack, haystack_len) >= 0;
358
359 if ( is_ascii ) {
360 unsigned char *needle_dup, *haystack_dup;
361
362 needle_dup = (unsigned char *)estrndup((char *)needle, needle_len);
363 php_strtolower((char *)needle_dup, needle_len);
364 haystack_dup = (unsigned char *)estrndup((char *)haystack, haystack_len);
365 php_strtolower((char *)haystack_dup, haystack_len);
366
367 ret_pos = grapheme_strrpos_ascii(haystack_dup, haystack_len, needle_dup, needle_len, offset);
368
369 efree(haystack_dup);
370 efree(needle_dup);
371
372 if ( ret_pos >= 0 ) {
373 RETURN_LONG(ret_pos);
374 }
375
376 /* if the needle was ascii too, we are done */
377
378 if ( grapheme_ascii_check(needle, needle_len) >= 0 ) {
379 RETURN_FALSE;
380 }
381
382 /* else we need to continue via utf16 */
383 }
384
385 ret_pos = grapheme_strrpos_utf16(haystack, haystack_len, needle, needle_len, offset, 1 /* f_ignore_case */ TSRMLS_CC);
386
387 if ( ret_pos >= 0 ) {
388 RETURN_LONG(ret_pos);
389 } else {
390 RETURN_FALSE;
391 }
392
393
394 }
395 /* }}} */
396
397 /* {{{ proto string grapheme_substr(string str, int start [, int length])
398 Returns part of a string */
PHP_FUNCTION(grapheme_substr)399 PHP_FUNCTION(grapheme_substr)
400 {
401 unsigned char *str, *sub_str;
402 UChar *ustr;
403 int str_len, sub_str_len, ustr_len;
404 long lstart = 0, length = 0;
405 int32_t start = 0;
406 int iter_val;
407 UErrorCode status;
408 unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
409 UBreakIterator* bi = NULL;
410 int sub_str_start_pos, sub_str_end_pos;
411 int32_t (*iter_func)(UBreakIterator *);
412
413 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sl|l", (char **)&str, &str_len, &lstart, &length) == FAILURE) {
414
415 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
416 "grapheme_substr: unable to parse input param", 0 TSRMLS_CC );
417
418 RETURN_FALSE;
419 }
420
421 if ( OUTSIDE_STRING(lstart, str_len) ) {
422
423 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_substr: start not contained in string", 1 TSRMLS_CC );
424
425 RETURN_FALSE;
426 }
427
428 /* we checked that it will fit: */
429 start = (int32_t) lstart;
430
431 /* the offset is 'grapheme count offset' so it still might be invalid - we'll check it later */
432
433 if ( grapheme_ascii_check(str, str_len) >= 0 ) {
434 grapheme_substr_ascii((char *)str, str_len, start, length, ZEND_NUM_ARGS(), (char **) &sub_str, &sub_str_len);
435
436 if ( NULL == sub_str ) {
437 RETURN_FALSE;
438 }
439
440 RETURN_STRINGL(((char *)sub_str), sub_str_len, 1);
441 }
442
443 ustr = NULL;
444 ustr_len = 0;
445 status = U_ZERO_ERROR;
446 intl_convert_utf8_to_utf16(&ustr, &ustr_len, (char *)str, str_len, &status);
447
448 if ( U_FAILURE( status ) ) {
449 /* Set global error code. */
450 intl_error_set_code( NULL, status TSRMLS_CC );
451
452 /* Set error messages. */
453 intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 0 TSRMLS_CC );
454 if (ustr) {
455 efree( ustr );
456 }
457 RETURN_FALSE;
458 }
459
460 bi = grapheme_get_break_iterator((void*)u_break_iterator_buffer, &status TSRMLS_CC );
461
462 if( U_FAILURE(status) ) {
463 RETURN_FALSE;
464 }
465
466 ubrk_setText(bi, ustr, ustr_len, &status);
467
468 if ( start < 0 ) {
469 iter_func = ubrk_previous;
470 ubrk_last(bi);
471 iter_val = 1;
472 }
473 else {
474 iter_func = ubrk_next;
475 iter_val = -1;
476 }
477
478 sub_str_start_pos = 0;
479
480 while ( start ) {
481 sub_str_start_pos = iter_func(bi);
482
483 if ( UBRK_DONE == sub_str_start_pos ) {
484 break;
485 }
486
487 start += iter_val;
488 }
489
490 if ( 0 != start || sub_str_start_pos >= ustr_len ) {
491
492 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_substr: start not contained in string", 1 TSRMLS_CC );
493
494 if (ustr) {
495 efree(ustr);
496 }
497 ubrk_close(bi);
498 RETURN_FALSE;
499 }
500
501 if (ZEND_NUM_ARGS() <= 2) {
502
503 /* no length supplied, return the rest of the string */
504
505 sub_str = NULL;
506 sub_str_len = 0;
507 status = U_ZERO_ERROR;
508 intl_convert_utf16_to_utf8((char **)&sub_str, &sub_str_len, ustr + sub_str_start_pos, ustr_len - sub_str_start_pos, &status);
509
510 if (ustr) {
511 efree( ustr );
512 }
513 ubrk_close( bi );
514
515 if ( U_FAILURE( status ) ) {
516 /* Set global error code. */
517 intl_error_set_code( NULL, status TSRMLS_CC );
518
519 /* Set error messages. */
520 intl_error_set_custom_msg( NULL, "Error converting output string to UTF-8", 0 TSRMLS_CC );
521
522 if (sub_str) {
523 efree( sub_str );
524 }
525
526 RETURN_FALSE;
527 }
528
529 /* return the allocated string, not a duplicate */
530 RETURN_STRINGL(((char *)sub_str), sub_str_len, 0);
531 }
532
533 /* find the end point of the string to return */
534
535 if ( length < 0 ) {
536 iter_func = ubrk_previous;
537 ubrk_last(bi);
538 iter_val = 1;
539 }
540 else {
541 iter_func = ubrk_next;
542 iter_val = -1;
543 }
544
545 sub_str_end_pos = 0;
546
547 while ( length ) {
548 sub_str_end_pos = iter_func(bi);
549
550 if ( UBRK_DONE == sub_str_end_pos ) {
551 break;
552 }
553
554 length += iter_val;
555 }
556
557 if ( UBRK_DONE == sub_str_end_pos && length < 0) {
558
559 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_substr: length not contained in string", 1 TSRMLS_CC );
560
561 efree(ustr);
562 ubrk_close(bi);
563 RETURN_FALSE;
564 }
565
566 sub_str = NULL;
567 status = U_ZERO_ERROR;
568 intl_convert_utf16_to_utf8((char **)&sub_str, &sub_str_len, ustr + sub_str_start_pos, ( sub_str_end_pos - sub_str_start_pos ), &status);
569
570 efree( ustr );
571 ubrk_close( bi );
572
573 if ( U_FAILURE( status ) ) {
574 /* Set global error code. */
575 intl_error_set_code( NULL, status TSRMLS_CC );
576
577 /* Set error messages. */
578 intl_error_set_custom_msg( NULL, "Error converting output string to UTF-8", 0 TSRMLS_CC );
579
580 if ( NULL != sub_str )
581 efree( sub_str );
582
583 RETURN_FALSE;
584 }
585
586 /* return the allocated string, not a duplicate */
587 RETURN_STRINGL(((char *)sub_str), sub_str_len, 0);
588
589 }
590 /* }}} */
591
592 /* {{{ strstr_common_handler */
strstr_common_handler(INTERNAL_FUNCTION_PARAMETERS,int f_ignore_case)593 static void strstr_common_handler(INTERNAL_FUNCTION_PARAMETERS, int f_ignore_case)
594 {
595 unsigned char *haystack, *needle, *found;
596 int haystack_len, needle_len;
597 int ret_pos, uchar_pos;
598 zend_bool part = 0;
599
600 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|b", (char **)&haystack, &haystack_len, (char **)&needle, &needle_len, &part) == FAILURE) {
601
602 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
603 "grapheme_strstr: unable to parse input param", 0 TSRMLS_CC );
604
605 RETURN_FALSE;
606 }
607
608 if (needle_len == 0) {
609
610 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_strpos: Empty delimiter", 1 TSRMLS_CC );
611
612 RETURN_FALSE;
613 }
614
615
616 if ( !f_ignore_case ) {
617
618 /* ASCII optimization: quick check to see if the string might be there
619 * I realize that 'offset' is 'grapheme count offset' but will work in spite of that
620 */
621 found = (unsigned char *)php_memnstr((char *)haystack, (char *)needle, needle_len, (char *)haystack + haystack_len);
622
623 /* if it isn't there the we are done */
624 if ( !found ) {
625 RETURN_FALSE;
626 }
627
628 /* if it is there, and if the haystack is ascii, we are all done */
629 if ( grapheme_ascii_check(haystack, haystack_len) >= 0 ) {
630 size_t found_offset = found - haystack;
631
632 if (part) {
633 RETURN_STRINGL(((char *)haystack) , found_offset, 1);
634 } else {
635 RETURN_STRINGL(((char *)found), haystack_len - found_offset, 1);
636 }
637 }
638
639 }
640
641 /* need to work in utf16 */
642 ret_pos = grapheme_strpos_utf16(haystack, haystack_len, needle, needle_len, 0, &uchar_pos, f_ignore_case TSRMLS_CC );
643
644 if ( ret_pos < 0 ) {
645 RETURN_FALSE;
646 }
647
648 /* uchar_pos is the 'nth' Unicode character position of the needle */
649
650 ret_pos = 0;
651 U8_FWD_N(haystack, ret_pos, haystack_len, uchar_pos);
652
653 if (part) {
654 RETURN_STRINGL(((char *)haystack), ret_pos, 1);
655 }
656 else {
657 RETURN_STRINGL(((char *)haystack) + ret_pos, haystack_len - ret_pos, 1);
658 }
659
660 }
661 /* }}} */
662
663 /* {{{ proto string grapheme_strstr(string haystack, string needle[, bool part])
664 Finds first occurrence of a string within another */
PHP_FUNCTION(grapheme_strstr)665 PHP_FUNCTION(grapheme_strstr)
666 {
667 strstr_common_handler(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0 /* f_ignore_case */);
668 }
669 /* }}} */
670
671 /* {{{ proto string grapheme_stristr(string haystack, string needle[, bool part])
672 Finds first occurrence of a string within another */
PHP_FUNCTION(grapheme_stristr)673 PHP_FUNCTION(grapheme_stristr)
674 {
675 strstr_common_handler(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1 /* f_ignore_case */);
676 }
677 /* }}} */
678
679 /* {{{ grapheme_extract_charcount_iter - grapheme iterator for grapheme_extract MAXCHARS */
680 static inline int32_t
grapheme_extract_charcount_iter(UBreakIterator * bi,int32_t csize,unsigned char * pstr,int32_t str_len)681 grapheme_extract_charcount_iter(UBreakIterator *bi, int32_t csize, unsigned char *pstr, int32_t str_len)
682 {
683 int pos = 0, prev_pos = 0;
684 int ret_pos = 0, prev_ret_pos = 0;
685
686 while ( 1 ) {
687 pos = ubrk_next(bi);
688
689 if ( UBRK_DONE == pos ) {
690 break;
691 }
692
693 /* if we are beyond our limit, then the loop is done */
694 if ( pos > csize ) {
695 break;
696 }
697
698 /* update our pointer in the original UTF-8 buffer by as many characters
699 as ubrk_next iterated over */
700
701 prev_ret_pos = ret_pos;
702 U8_FWD_N(pstr, ret_pos, str_len, pos - prev_pos);
703
704 if ( prev_ret_pos == ret_pos ) {
705 /* something wrong - malformed utf8? */
706 break;
707 }
708
709 prev_pos = pos;
710 }
711
712 return ret_pos;
713 }
714 /* }}} */
715
716 /* {{{ grapheme_extract_bytecount_iter - grapheme iterator for grapheme_extract MAXBYTES */
717 static inline int32_t
grapheme_extract_bytecount_iter(UBreakIterator * bi,int32_t bsize,unsigned char * pstr,int32_t str_len)718 grapheme_extract_bytecount_iter(UBreakIterator *bi, int32_t bsize, unsigned char *pstr, int32_t str_len)
719 {
720 int pos = 0, prev_pos = 0;
721 int ret_pos = 0, prev_ret_pos = 0;
722
723 while ( 1 ) {
724 pos = ubrk_next(bi);
725
726 if ( UBRK_DONE == pos ) {
727 break;
728 }
729
730 prev_ret_pos = ret_pos;
731 U8_FWD_N(pstr, ret_pos, str_len, pos - prev_pos);
732
733 if ( ret_pos > bsize ) {
734 ret_pos = prev_ret_pos;
735 break;
736 }
737
738 if ( prev_ret_pos == ret_pos ) {
739 /* something wrong - malformed utf8? */
740 break;
741 }
742
743 prev_pos = pos;
744 }
745
746 return ret_pos;
747 }
748 /* }}} */
749
750 /* {{{ grapheme_extract_count_iter - grapheme iterator for grapheme_extract COUNT */
751 static inline int32_t
grapheme_extract_count_iter(UBreakIterator * bi,int32_t size,unsigned char * pstr,int32_t str_len)752 grapheme_extract_count_iter(UBreakIterator *bi, int32_t size, unsigned char *pstr, int32_t str_len)
753 {
754 int pos = 0, next_pos = 0;
755 int ret_pos = 0;
756
757 while ( size ) {
758 next_pos = ubrk_next(bi);
759
760 if ( UBRK_DONE == next_pos ) {
761 break;
762 }
763 pos = next_pos;
764 size--;
765 }
766
767 /* pos is one past the last UChar - and represent the number of code units to
768 advance in the utf-8 buffer
769 */
770
771 U8_FWD_N(pstr, ret_pos, str_len, pos);
772
773 return ret_pos;
774 }
775 /* }}} */
776
777 /* {{{ grapheme extract iter function pointer array */
778 typedef int32_t (*grapheme_extract_iter)(UBreakIterator * /*bi*/, int32_t /*size*/, unsigned char * /*pstr*/, int32_t /*str_len*/);
779
780 static grapheme_extract_iter grapheme_extract_iters[] = {
781 &grapheme_extract_count_iter,
782 &grapheme_extract_bytecount_iter,
783 &grapheme_extract_charcount_iter,
784 };
785 /* }}} */
786
787 /* {{{ proto string grapheme_extract(string str, int size[, int extract_type[, int start[, int next]]])
788 Function to extract a sequence of default grapheme clusters */
PHP_FUNCTION(grapheme_extract)789 PHP_FUNCTION(grapheme_extract)
790 {
791 unsigned char *str, *pstr;
792 UChar *ustr;
793 int str_len, ustr_len;
794 long size; /* maximum number of grapheme clusters, bytes, or characters (based on extract_type) to return */
795 long lstart = 0; /* starting position in str in bytes */
796 int32_t start = 0;
797 long extract_type = GRAPHEME_EXTRACT_TYPE_COUNT;
798 UErrorCode status;
799 unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
800 UBreakIterator* bi = NULL;
801 int ret_pos;
802 zval *next = NULL; /* return offset of next part of the string */
803
804 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sl|llz", (char **)&str, &str_len, &size, &extract_type, &lstart, &next) == FAILURE) {
805
806 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
807 "grapheme_extract: unable to parse input param", 0 TSRMLS_CC );
808
809 RETURN_FALSE;
810 }
811
812 if ( NULL != next ) {
813 if ( !PZVAL_IS_REF(next) ) {
814 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
815 "grapheme_extract: 'next' was not passed by reference", 0 TSRMLS_CC );
816
817 RETURN_FALSE;
818 }
819 else {
820 /* initialize next */
821 zval_dtor(next);
822 ZVAL_LONG(next, lstart);
823 }
824 }
825
826 if ( extract_type < GRAPHEME_EXTRACT_TYPE_MIN || extract_type > GRAPHEME_EXTRACT_TYPE_MAX ) {
827
828 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
829 "grapheme_extract: unknown extract type param", 0 TSRMLS_CC );
830
831 RETURN_FALSE;
832 }
833
834 if ( lstart > INT32_MAX || lstart < 0 || lstart >= str_len ) {
835 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_extract: start not contained in string", 0 TSRMLS_CC );
836 RETURN_FALSE;
837 }
838
839 if ( size > INT32_MAX || size < 0) {
840 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR, "grapheme_extract: size is invalid", 0 TSRMLS_CC );
841 RETURN_FALSE;
842 }
843 if (size == 0) {
844 RETURN_EMPTY_STRING();
845 }
846
847 /* we checked that it will fit: */
848 start = (int32_t) lstart;
849
850 pstr = str + start;
851
852 /* just in case pstr points in the middle of a character, move forward to the start of the next char */
853 if ( !UTF8_IS_SINGLE(*pstr) && !U8_IS_LEAD(*pstr) ) {
854 unsigned char *str_end = str + str_len;
855
856 while ( !UTF8_IS_SINGLE(*pstr) && !U8_IS_LEAD(*pstr) ) {
857 pstr++;
858 if ( pstr >= str_end ) {
859 intl_error_set( NULL, U_ILLEGAL_ARGUMENT_ERROR,
860 "grapheme_extract: invalid input string", 0 TSRMLS_CC );
861
862 RETURN_FALSE;
863 }
864 }
865 }
866
867 str_len -= (pstr - str);
868
869 /* if the string is all ASCII up to size+1 - or str_len whichever is first - then we are done.
870 (size + 1 because the size-th character might be the beginning of a grapheme cluster)
871 */
872
873 if ( -1 != grapheme_ascii_check(pstr, size + 1 < str_len ? size + 1 : str_len ) ) {
874 long nsize = ( size < str_len ? size : str_len );
875 if ( NULL != next ) {
876 ZVAL_LONG(next, start+nsize);
877 }
878 RETURN_STRINGL(((char *)pstr), nsize, 1);
879 }
880
881 /* convert the strings to UTF-16. */
882 ustr = NULL;
883 ustr_len = 0;
884 status = U_ZERO_ERROR;
885 intl_convert_utf8_to_utf16(&ustr, &ustr_len, (char *)pstr, str_len, &status );
886
887 if ( U_FAILURE( status ) ) {
888 /* Set global error code. */
889 intl_error_set_code( NULL, status TSRMLS_CC );
890
891 /* Set error messages. */
892 intl_error_set_custom_msg( NULL, "Error converting input string to UTF-16", 0 TSRMLS_CC );
893
894 if ( NULL != ustr )
895 efree( ustr );
896
897 RETURN_FALSE;
898 }
899
900 bi = NULL;
901 status = U_ZERO_ERROR;
902 bi = grapheme_get_break_iterator(u_break_iterator_buffer, &status TSRMLS_CC );
903
904 ubrk_setText(bi, ustr, ustr_len, &status);
905
906 /* if the caller put us in the middle of a grapheme, we can't detect it in all cases since we
907 can't back up. So, we will not do anything. */
908
909 /* now we need to find the end of the chunk the user wants us to return */
910
911 ret_pos = (*grapheme_extract_iters[extract_type])(bi, size, pstr, str_len);
912
913 if (ustr) {
914 efree(ustr);
915 }
916 ubrk_close(bi);
917
918 if ( NULL != next ) {
919 ZVAL_LONG(next, start+ret_pos);
920 }
921
922 RETURN_STRINGL(((char *)pstr), ret_pos, 1);
923 }
924
925 /* }}} */
926
927 /*
928 * Local variables:
929 * tab-width: 4
930 * c-basic-offset: 4
931 * End:
932 * vim600: fdm=marker
933 * vim: noet sw=4 ts=4
934 */
935
936
