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 #include "intl_common.h"
26
27 #include <unicode/utypes.h>
28 #include <unicode/ucol.h>
29 #include <unicode/ustring.h>
30 #include <unicode/ubrk.h>
31 #include <unicode/usearch.h>
32
33 #include "ext/standard/php_string.h"
34
ZEND_EXTERN_MODULE_GLOBALS(intl)35 ZEND_EXTERN_MODULE_GLOBALS( intl )
36
37 /* }}} */
38
39 /* {{{ grapheme_close_global_iterator - clean up */
40 void
41 grapheme_close_global_iterator( TSRMLS_D )
42 {
43 UBreakIterator *global_break_iterator = INTL_G( grapheme_iterator );
44
45 if ( NULL != global_break_iterator ) {
46 ubrk_close(global_break_iterator);
47 }
48 }
49 /* }}} */
50
51 /* {{{ grapheme_substr_ascii f='from' - starting point, l='length' */
grapheme_substr_ascii(char * str,int str_len,int f,int l,int argc,char ** sub_str,int * sub_str_len)52 void grapheme_substr_ascii(char *str, int str_len, int f, int l, int argc, char **sub_str, int *sub_str_len)
53 {
54 *sub_str = NULL;
55
56 if (argc > 2) {
57 if ((l < 0 && -l > str_len)) {
58 return;
59 } else if (l > str_len) {
60 l = str_len;
61 }
62 } else {
63 l = str_len;
64 }
65
66 if (f > str_len || (f < 0 && -f > str_len)) {
67 return;
68 }
69
70 if (l < 0 && (l + str_len - f) < 0) {
71 return;
72 }
73
74 /* if "from" position is negative, count start position from the end
75 * of the string
76 */
77 if (f < 0) {
78 f = str_len + f;
79 if (f < 0) {
80 f = 0;
81 }
82 }
83
84
85 /* if "length" position is negative, set it to the length
86 * needed to stop that many chars from the end of the string
87 */
88 if (l < 0) {
89 l = (str_len - f) + l;
90 if (l < 0) {
91 l = 0;
92 }
93 }
94
95 if (f >= str_len) {
96 return;
97 }
98
99 if ((f + l) > str_len) {
100 l = str_len - f;
101 }
102
103 *sub_str = str + f;
104 *sub_str_len = l;
105
106 return;
107 }
108 /* }}} */
109
110 #define STRPOS_CHECK_STATUS(status, error) \
111 if ( U_FAILURE( (status) ) ) { \
112 intl_error_set_code( NULL, (status) TSRMLS_CC ); \
113 intl_error_set_custom_msg( NULL, (error), 0 TSRMLS_CC ); \
114 if (uhaystack) { \
115 efree( uhaystack ); \
116 } \
117 if (uneedle) { \
118 efree( uneedle ); \
119 } \
120 if(bi) { \
121 ubrk_close (bi); \
122 } \
123 if(src) { \
124 usearch_close(src); \
125 } \
126 return -1; \
127 }
128
129
130 /* {{{ grapheme_strpos_utf16 - strrpos using utf16*/
grapheme_strpos_utf16(unsigned char * haystack,int32_t haystack_len,unsigned char * needle,int32_t needle_len,int32_t offset,int32_t * puchar_pos,int f_ignore_case,int last TSRMLS_DC)131 int grapheme_strpos_utf16(unsigned char *haystack, int32_t haystack_len, unsigned char*needle, int32_t needle_len, int32_t offset, int32_t *puchar_pos, int f_ignore_case, int last TSRMLS_DC)
132 {
133 UChar *uhaystack = NULL, *uneedle = NULL;
134 int32_t uhaystack_len = 0, uneedle_len = 0, char_pos, ret_pos, offset_pos = 0;
135 unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
136 UBreakIterator* bi = NULL;
137 UErrorCode status;
138 UStringSearch* src = NULL;
139 UCollator *coll;
140
141 if(puchar_pos) {
142 *puchar_pos = -1;
143 }
144 /* convert the strings to UTF-16. */
145
146 status = U_ZERO_ERROR;
147 intl_convert_utf8_to_utf16(&uhaystack, &uhaystack_len, (char *) haystack, haystack_len, &status );
148 STRPOS_CHECK_STATUS(status, "Error converting input string to UTF-16");
149
150 status = U_ZERO_ERROR;
151 intl_convert_utf8_to_utf16(&uneedle, &uneedle_len, (char *) needle, needle_len, &status );
152 STRPOS_CHECK_STATUS(status, "Error converting input string to UTF-16");
153
154 /* get a pointer to the haystack taking into account the offset */
155 status = U_ZERO_ERROR;
156 bi = grapheme_get_break_iterator(u_break_iterator_buffer, &status TSRMLS_CC );
157 STRPOS_CHECK_STATUS(status, "Failed to get iterator");
158 status = U_ZERO_ERROR;
159 ubrk_setText(bi, uhaystack, uhaystack_len, &status);
160 STRPOS_CHECK_STATUS(status, "Failed to set up iterator");
161
162 status = U_ZERO_ERROR;
163 src = usearch_open(uneedle, uneedle_len, uhaystack, uhaystack_len, "", bi, &status);
164 STRPOS_CHECK_STATUS(status, "Error creating search object");
165
166 if(f_ignore_case) {
167 coll = usearch_getCollator(src);
168 status = U_ZERO_ERROR;
169 ucol_setAttribute(coll, UCOL_STRENGTH, UCOL_SECONDARY, &status);
170 STRPOS_CHECK_STATUS(status, "Error setting collation strength");
171 usearch_reset(src);
172 }
173
174 if(offset != 0) {
175 offset_pos = grapheme_get_haystack_offset(bi, offset);
176 if(offset_pos == -1) {
177 status = U_ILLEGAL_ARGUMENT_ERROR;
178 STRPOS_CHECK_STATUS(status, "Invalid search offset");
179 }
180 status = U_ZERO_ERROR;
181 usearch_setOffset(src, offset_pos, &status);
182 STRPOS_CHECK_STATUS(status, "Invalid search offset");
183 }
184
185
186 if(last) {
187 char_pos = usearch_last(src, &status);
188 if(char_pos < offset_pos) {
189 /* last one is beyound our start offset */
190 char_pos = USEARCH_DONE;
191 }
192 } else {
193 char_pos = usearch_next(src, &status);
194 }
195 STRPOS_CHECK_STATUS(status, "Error looking up string");
196 if(char_pos != USEARCH_DONE && ubrk_isBoundary(bi, char_pos)) {
197 ret_pos = grapheme_count_graphemes(bi, uhaystack,char_pos);
198 if(puchar_pos) {
199 *puchar_pos = char_pos;
200 }
201 } else {
202 ret_pos = -1;
203 }
204
205 if (uhaystack) {
206 efree( uhaystack );
207 }
208 if (uneedle) {
209 efree( uneedle );
210 }
211 ubrk_close (bi);
212 usearch_close (src);
213
214 return ret_pos;
215 }
216
217 /* }}} */
218
219 /* {{{ grapheme_ascii_check: ASCII check */
grapheme_ascii_check(const unsigned char * day,int32_t len)220 int grapheme_ascii_check(const unsigned char *day, int32_t len)
221 {
222 int ret_len = len;
223 while ( len-- ) {
224 if ( *day++ > 0x7f )
225 return -1;
226 }
227
228 return ret_len;
229 }
230
231 /* }}} */
232
233 /* {{{ grapheme_split_string: find and optionally return grapheme boundaries */
grapheme_split_string(const UChar * text,int32_t text_length,int boundary_array[],int boundary_array_len TSRMLS_DC)234 int grapheme_split_string(const UChar *text, int32_t text_length, int boundary_array[], int boundary_array_len TSRMLS_DC )
235 {
236 unsigned char u_break_iterator_buffer[U_BRK_SAFECLONE_BUFFERSIZE];
237 UErrorCode status = U_ZERO_ERROR;
238 int ret_len, pos;
239 UBreakIterator* bi;
240
241 bi = grapheme_get_break_iterator((void*)u_break_iterator_buffer, &status TSRMLS_CC );
242
243 if( U_FAILURE(status) ) {
244 return -1;
245 }
246
247 ubrk_setText(bi, text, text_length, &status);
248
249 pos = 0;
250
251 for ( ret_len = 0; pos != UBRK_DONE; ) {
252
253 pos = ubrk_next(bi);
254
255 if ( pos != UBRK_DONE ) {
256
257 if ( NULL != boundary_array && ret_len < boundary_array_len ) {
258 boundary_array[ret_len] = pos;
259 }
260
261 ret_len++;
262 }
263 }
264
265 ubrk_close(bi);
266
267 return ret_len;
268 }
269 /* }}} */
270
271 /* {{{ grapheme_count_graphemes */
grapheme_count_graphemes(UBreakIterator * bi,UChar * string,int32_t string_len)272 int32_t grapheme_count_graphemes(UBreakIterator *bi, UChar *string, int32_t string_len)
273 {
274 int ret_len = 0;
275 int pos = 0;
276 UErrorCode status = U_ZERO_ERROR;
277
278 ubrk_setText(bi, string, string_len, &status);
279
280 do {
281
282 pos = ubrk_next(bi);
283
284 if ( UBRK_DONE != pos ) {
285 ret_len++;
286 }
287
288 } while ( UBRK_DONE != pos );
289
290 return ret_len;
291 }
292 /* }}} */
293
294
295 /* {{{ grapheme_get_haystack_offset - bump the haystack pointer based on the grapheme count offset */
grapheme_get_haystack_offset(UBreakIterator * bi,int32_t offset)296 int grapheme_get_haystack_offset(UBreakIterator* bi, int32_t offset)
297 {
298 int32_t pos;
299 int32_t (*iter_op)(UBreakIterator* bi);
300 int iter_incr;
301
302 if ( 0 == offset ) {
303 return 0;
304 }
305
306 if ( offset < 0 ) {
307 iter_op = ubrk_previous;
308 ubrk_last(bi); /* one past the end */
309 iter_incr = 1;
310 }
311 else {
312 iter_op = ubrk_next;
313 iter_incr = -1;
314 }
315
316 pos = 0;
317
318 while ( pos != UBRK_DONE && offset != 0 ) {
319
320 pos = iter_op(bi);
321
322 if ( UBRK_DONE != pos ) {
323 offset += iter_incr;
324 }
325 }
326
327 if ( offset != 0 ) {
328 return -1;
329 }
330
331 return pos;
332 }
333 /* }}} */
334
335 /* {{{ grapheme_strrpos_ascii: borrowed from the php ext/standard/string.c */
336 int32_t
grapheme_strrpos_ascii(unsigned char * haystack,int32_t haystack_len,unsigned char * needle,int32_t needle_len,int32_t offset)337 grapheme_strrpos_ascii(unsigned char *haystack, int32_t haystack_len, unsigned char *needle, int32_t needle_len, int32_t offset)
338 {
339 unsigned char *p, *e;
340
341 if (offset >= 0) {
342 p = haystack + offset;
343 e = haystack + haystack_len - needle_len;
344 } else {
345 p = haystack;
346 if (needle_len > -offset) {
347 e = haystack + haystack_len - needle_len;
348 } else {
349 e = haystack + haystack_len + offset;
350 }
351 }
352
353 if (needle_len == 1) {
354 /* Single character search can shortcut memcmps */
355 while (e >= p) {
356 if (*e == *needle) {
357 return (e - p + (offset > 0 ? offset : 0));
358 }
359 e--;
360 }
361 return -1;
362 }
363
364 while (e >= p) {
365 if (memcmp(e, needle, needle_len) == 0) {
366 return (e - p + (offset > 0 ? offset : 0));
367 }
368 e--;
369 }
370
371 return -1;
372 }
373
374 /* }}} */
375
376 /* {{{ grapheme_get_break_iterator: get a clone of the global character break iterator */
grapheme_get_break_iterator(void * stack_buffer,UErrorCode * status TSRMLS_DC)377 UBreakIterator* grapheme_get_break_iterator(void *stack_buffer, UErrorCode *status TSRMLS_DC )
378 {
379 int32_t buffer_size;
380
381 UBreakIterator *global_break_iterator = INTL_G( grapheme_iterator );
382
383 if ( NULL == global_break_iterator ) {
384
385 global_break_iterator = ubrk_open(UBRK_CHARACTER,
386 NULL, /* icu default locale - locale has no effect on this iterator */
387 NULL, /* text not set in global iterator */
388 0, /* text length = 0 */
389 status);
390
391 INTL_G(grapheme_iterator) = global_break_iterator;
392 }
393
394 buffer_size = U_BRK_SAFECLONE_BUFFERSIZE;
395
396 return ubrk_safeClone(global_break_iterator, stack_buffer, &buffer_size, status);
397 }
398 /* }}} */
399
400 /*
401 * Local variables:
402 * tab-width: 4
403 * c-basic-offset: 4
404 * End:
405 * vim600: fdm=marker
406 * vim: noet sw=4 ts=4
407 */
408
409
