1 | /* |
---|
2 | * tclUtf.c -- |
---|
3 | * |
---|
4 | * Routines for manipulating UTF-8 strings. |
---|
5 | * |
---|
6 | * Copyright (c) 1997-1998 Sun Microsystems, Inc. |
---|
7 | * |
---|
8 | * See the file "license.terms" for information on usage and redistribution of |
---|
9 | * this file, and for a DISCLAIMER OF ALL WARRANTIES. |
---|
10 | * |
---|
11 | * RCS: @(#) $Id: tclUtf.c,v 1.37 2005/10/31 15:59:41 dkf Exp $ |
---|
12 | */ |
---|
13 | |
---|
14 | #include "tclInt.h" |
---|
15 | |
---|
16 | /* |
---|
17 | * Include the static character classification tables and macros. |
---|
18 | */ |
---|
19 | |
---|
20 | #include "tclUniData.c" |
---|
21 | |
---|
22 | /* |
---|
23 | * The following macros are used for fast character category tests. The x_BITS |
---|
24 | * values are shifted right by the category value to determine whether the |
---|
25 | * given category is included in the set. |
---|
26 | */ |
---|
27 | |
---|
28 | #define ALPHA_BITS ((1 << UPPERCASE_LETTER) | (1 << LOWERCASE_LETTER) \ |
---|
29 | | (1 << TITLECASE_LETTER) | (1 << MODIFIER_LETTER) | (1<<OTHER_LETTER)) |
---|
30 | |
---|
31 | #define DIGIT_BITS (1 << DECIMAL_DIGIT_NUMBER) |
---|
32 | |
---|
33 | #define SPACE_BITS ((1 << SPACE_SEPARATOR) | (1 << LINE_SEPARATOR) \ |
---|
34 | | (1 << PARAGRAPH_SEPARATOR)) |
---|
35 | |
---|
36 | #define CONNECTOR_BITS (1 << CONNECTOR_PUNCTUATION) |
---|
37 | |
---|
38 | #define PRINT_BITS (ALPHA_BITS | DIGIT_BITS | SPACE_BITS | \ |
---|
39 | (1 << NON_SPACING_MARK) | (1 << ENCLOSING_MARK) | \ |
---|
40 | (1 << COMBINING_SPACING_MARK) | (1 << LETTER_NUMBER) | \ |
---|
41 | (1 << OTHER_NUMBER) | (1 << CONNECTOR_PUNCTUATION) | \ |
---|
42 | (1 << DASH_PUNCTUATION) | (1 << OPEN_PUNCTUATION) | \ |
---|
43 | (1 << CLOSE_PUNCTUATION) | (1 << INITIAL_QUOTE_PUNCTUATION) | \ |
---|
44 | (1 << FINAL_QUOTE_PUNCTUATION) | (1 << OTHER_PUNCTUATION) | \ |
---|
45 | (1 << MATH_SYMBOL) | (1 << CURRENCY_SYMBOL) | \ |
---|
46 | (1 << MODIFIER_SYMBOL) | (1 << OTHER_SYMBOL)) |
---|
47 | |
---|
48 | #define PUNCT_BITS ((1 << CONNECTOR_PUNCTUATION) | \ |
---|
49 | (1 << DASH_PUNCTUATION) | (1 << OPEN_PUNCTUATION) | \ |
---|
50 | (1 << CLOSE_PUNCTUATION) | (1 << INITIAL_QUOTE_PUNCTUATION) | \ |
---|
51 | (1 << FINAL_QUOTE_PUNCTUATION) | (1 << OTHER_PUNCTUATION)) |
---|
52 | |
---|
53 | /* |
---|
54 | * Unicode characters less than this value are represented by themselves in |
---|
55 | * UTF-8 strings. |
---|
56 | */ |
---|
57 | |
---|
58 | #define UNICODE_SELF 0x80 |
---|
59 | |
---|
60 | /* |
---|
61 | * The following structures are used when mapping between Unicode (UCS-2) and |
---|
62 | * UTF-8. |
---|
63 | */ |
---|
64 | |
---|
65 | static CONST unsigned char totalBytes[256] = { |
---|
66 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
---|
67 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
---|
68 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
---|
69 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
---|
70 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
---|
71 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, |
---|
72 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, |
---|
73 | 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, |
---|
74 | #if TCL_UTF_MAX > 3 |
---|
75 | 4,4,4,4,4,4,4,4, |
---|
76 | #else |
---|
77 | 1,1,1,1,1,1,1,1, |
---|
78 | #endif |
---|
79 | #if TCL_UTF_MAX > 4 |
---|
80 | 5,5,5,5, |
---|
81 | #else |
---|
82 | 1,1,1,1, |
---|
83 | #endif |
---|
84 | #if TCL_UTF_MAX > 5 |
---|
85 | 6,6,6,6 |
---|
86 | #else |
---|
87 | 1,1,1,1 |
---|
88 | #endif |
---|
89 | }; |
---|
90 | |
---|
91 | /* |
---|
92 | * Functions used only in this module. |
---|
93 | */ |
---|
94 | |
---|
95 | static int UtfCount(int ch); |
---|
96 | |
---|
97 | /* |
---|
98 | *--------------------------------------------------------------------------- |
---|
99 | * |
---|
100 | * UtfCount -- |
---|
101 | * |
---|
102 | * Find the number of bytes in the Utf character "ch". |
---|
103 | * |
---|
104 | * Results: |
---|
105 | * The return values is the number of bytes in the Utf character "ch". |
---|
106 | * |
---|
107 | * Side effects: |
---|
108 | * None. |
---|
109 | * |
---|
110 | *--------------------------------------------------------------------------- |
---|
111 | */ |
---|
112 | |
---|
113 | INLINE static int |
---|
114 | UtfCount( |
---|
115 | int ch) /* The Tcl_UniChar whose size is returned. */ |
---|
116 | { |
---|
117 | if ((ch > 0) && (ch < UNICODE_SELF)) { |
---|
118 | return 1; |
---|
119 | } |
---|
120 | if (ch <= 0x7FF) { |
---|
121 | return 2; |
---|
122 | } |
---|
123 | if (ch <= 0xFFFF) { |
---|
124 | return 3; |
---|
125 | } |
---|
126 | #if TCL_UTF_MAX > 3 |
---|
127 | if (ch <= 0x1FFFFF) { |
---|
128 | return 4; |
---|
129 | } |
---|
130 | if (ch <= 0x3FFFFFF) { |
---|
131 | return 5; |
---|
132 | } |
---|
133 | if (ch <= 0x7FFFFFFF) { |
---|
134 | return 6; |
---|
135 | } |
---|
136 | #endif |
---|
137 | return 3; |
---|
138 | } |
---|
139 | |
---|
140 | /* |
---|
141 | *--------------------------------------------------------------------------- |
---|
142 | * |
---|
143 | * Tcl_UniCharToUtf -- |
---|
144 | * |
---|
145 | * Store the given Tcl_UniChar as a sequence of UTF-8 bytes in the |
---|
146 | * provided buffer. Equivalent to Plan 9 runetochar(). |
---|
147 | * |
---|
148 | * Results: |
---|
149 | * The return values is the number of bytes in the buffer that were |
---|
150 | * consumed. |
---|
151 | * |
---|
152 | * Side effects: |
---|
153 | * None. |
---|
154 | * |
---|
155 | *--------------------------------------------------------------------------- |
---|
156 | */ |
---|
157 | |
---|
158 | INLINE int |
---|
159 | Tcl_UniCharToUtf( |
---|
160 | int ch, /* The Tcl_UniChar to be stored in the |
---|
161 | * buffer. */ |
---|
162 | char *buf) /* Buffer in which the UTF-8 representation of |
---|
163 | * the Tcl_UniChar is stored. Buffer must be |
---|
164 | * large enough to hold the UTF-8 character |
---|
165 | * (at most TCL_UTF_MAX bytes). */ |
---|
166 | { |
---|
167 | if ((ch > 0) && (ch < UNICODE_SELF)) { |
---|
168 | buf[0] = (char) ch; |
---|
169 | return 1; |
---|
170 | } |
---|
171 | if (ch >= 0) { |
---|
172 | if (ch <= 0x7FF) { |
---|
173 | buf[1] = (char) ((ch | 0x80) & 0xBF); |
---|
174 | buf[0] = (char) ((ch >> 6) | 0xC0); |
---|
175 | return 2; |
---|
176 | } |
---|
177 | if (ch <= 0xFFFF) { |
---|
178 | three: |
---|
179 | buf[2] = (char) ((ch | 0x80) & 0xBF); |
---|
180 | buf[1] = (char) (((ch >> 6) | 0x80) & 0xBF); |
---|
181 | buf[0] = (char) ((ch >> 12) | 0xE0); |
---|
182 | return 3; |
---|
183 | } |
---|
184 | |
---|
185 | #if TCL_UTF_MAX > 3 |
---|
186 | if (ch <= 0x1FFFFF) { |
---|
187 | buf[3] = (char) ((ch | 0x80) & 0xBF); |
---|
188 | buf[2] = (char) (((ch >> 6) | 0x80) & 0xBF); |
---|
189 | buf[1] = (char) (((ch >> 12) | 0x80) & 0xBF); |
---|
190 | buf[0] = (char) ((ch >> 18) | 0xF0); |
---|
191 | return 4; |
---|
192 | } |
---|
193 | if (ch <= 0x3FFFFFF) { |
---|
194 | buf[4] = (char) ((ch | 0x80) & 0xBF); |
---|
195 | buf[3] = (char) (((ch >> 6) | 0x80) & 0xBF); |
---|
196 | buf[2] = (char) (((ch >> 12) | 0x80) & 0xBF); |
---|
197 | buf[1] = (char) (((ch >> 18) | 0x80) & 0xBF); |
---|
198 | buf[0] = (char) ((ch >> 24) | 0xF8); |
---|
199 | return 5; |
---|
200 | } |
---|
201 | if (ch <= 0x7FFFFFFF) { |
---|
202 | buf[5] = (char) ((ch | 0x80) & 0xBF); |
---|
203 | buf[4] = (char) (((ch >> 6) | 0x80) & 0xBF); |
---|
204 | buf[3] = (char) (((ch >> 12) | 0x80) & 0xBF); |
---|
205 | buf[2] = (char) (((ch >> 18) | 0x80) & 0xBF); |
---|
206 | buf[1] = (char) (((ch >> 24) | 0x80) & 0xBF); |
---|
207 | buf[0] = (char) ((ch >> 30) | 0xFC); |
---|
208 | return 6; |
---|
209 | } |
---|
210 | #endif |
---|
211 | } |
---|
212 | |
---|
213 | ch = 0xFFFD; |
---|
214 | goto three; |
---|
215 | } |
---|
216 | |
---|
217 | /* |
---|
218 | *--------------------------------------------------------------------------- |
---|
219 | * |
---|
220 | * Tcl_UniCharToUtfDString -- |
---|
221 | * |
---|
222 | * Convert the given Unicode string to UTF-8. |
---|
223 | * |
---|
224 | * Results: |
---|
225 | * The return value is a pointer to the UTF-8 representation of the |
---|
226 | * Unicode string. Storage for the return value is appended to the end of |
---|
227 | * dsPtr. |
---|
228 | * |
---|
229 | * Side effects: |
---|
230 | * None. |
---|
231 | * |
---|
232 | *--------------------------------------------------------------------------- |
---|
233 | */ |
---|
234 | |
---|
235 | char * |
---|
236 | Tcl_UniCharToUtfDString( |
---|
237 | CONST Tcl_UniChar *uniStr, /* Unicode string to convert to UTF-8. */ |
---|
238 | int uniLength, /* Length of Unicode string in Tcl_UniChars |
---|
239 | * (must be >= 0). */ |
---|
240 | Tcl_DString *dsPtr) /* UTF-8 representation of string is appended |
---|
241 | * to this previously initialized DString. */ |
---|
242 | { |
---|
243 | CONST Tcl_UniChar *w, *wEnd; |
---|
244 | char *p, *string; |
---|
245 | int oldLength; |
---|
246 | |
---|
247 | /* |
---|
248 | * UTF-8 string length in bytes will be <= Unicode string length * |
---|
249 | * TCL_UTF_MAX. |
---|
250 | */ |
---|
251 | |
---|
252 | oldLength = Tcl_DStringLength(dsPtr); |
---|
253 | Tcl_DStringSetLength(dsPtr, (oldLength + uniLength + 1) * TCL_UTF_MAX); |
---|
254 | string = Tcl_DStringValue(dsPtr) + oldLength; |
---|
255 | |
---|
256 | p = string; |
---|
257 | wEnd = uniStr + uniLength; |
---|
258 | for (w = uniStr; w < wEnd; ) { |
---|
259 | p += Tcl_UniCharToUtf(*w, p); |
---|
260 | w++; |
---|
261 | } |
---|
262 | Tcl_DStringSetLength(dsPtr, oldLength + (p - string)); |
---|
263 | |
---|
264 | return string; |
---|
265 | } |
---|
266 | |
---|
267 | /* |
---|
268 | *--------------------------------------------------------------------------- |
---|
269 | * |
---|
270 | * Tcl_UtfToUniChar -- |
---|
271 | * |
---|
272 | * Extract the Tcl_UniChar represented by the UTF-8 string. Bad UTF-8 |
---|
273 | * sequences are converted to valid Tcl_UniChars and processing |
---|
274 | * continues. Equivalent to Plan 9 chartorune(). |
---|
275 | * |
---|
276 | * The caller must ensure that the source buffer is long enough that this |
---|
277 | * routine does not run off the end and dereference non-existent memory |
---|
278 | * looking for trail bytes. If the source buffer is known to be '\0' |
---|
279 | * terminated, this cannot happen. Otherwise, the caller should call |
---|
280 | * Tcl_UtfCharComplete() before calling this routine to ensure that |
---|
281 | * enough bytes remain in the string. |
---|
282 | * |
---|
283 | * Results: |
---|
284 | * *chPtr is filled with the Tcl_UniChar, and the return value is the |
---|
285 | * number of bytes from the UTF-8 string that were consumed. |
---|
286 | * |
---|
287 | * Side effects: |
---|
288 | * None. |
---|
289 | * |
---|
290 | *--------------------------------------------------------------------------- |
---|
291 | */ |
---|
292 | |
---|
293 | int |
---|
294 | Tcl_UtfToUniChar( |
---|
295 | register CONST char *src, /* The UTF-8 string. */ |
---|
296 | register Tcl_UniChar *chPtr)/* Filled with the Tcl_UniChar represented by |
---|
297 | * the UTF-8 string. */ |
---|
298 | { |
---|
299 | register int byte; |
---|
300 | |
---|
301 | /* |
---|
302 | * Unroll 1 to 3 byte UTF-8 sequences, use loop to handle longer ones. |
---|
303 | */ |
---|
304 | |
---|
305 | byte = *((unsigned char *) src); |
---|
306 | if (byte < 0xC0) { |
---|
307 | /* |
---|
308 | * Handles properly formed UTF-8 characters between 0x01 and 0x7F. |
---|
309 | * Also treats \0 and naked trail bytes 0x80 to 0xBF as valid |
---|
310 | * characters representing themselves. |
---|
311 | */ |
---|
312 | |
---|
313 | *chPtr = (Tcl_UniChar) byte; |
---|
314 | return 1; |
---|
315 | } else if (byte < 0xE0) { |
---|
316 | if ((src[1] & 0xC0) == 0x80) { |
---|
317 | /* |
---|
318 | * Two-byte-character lead-byte followed by a trail-byte. |
---|
319 | */ |
---|
320 | |
---|
321 | *chPtr = (Tcl_UniChar) (((byte & 0x1F) << 6) | (src[1] & 0x3F)); |
---|
322 | return 2; |
---|
323 | } |
---|
324 | |
---|
325 | /* |
---|
326 | * A two-byte-character lead-byte not followed by trail-byte |
---|
327 | * represents itself. |
---|
328 | */ |
---|
329 | |
---|
330 | *chPtr = (Tcl_UniChar) byte; |
---|
331 | return 1; |
---|
332 | } else if (byte < 0xF0) { |
---|
333 | if (((src[1] & 0xC0) == 0x80) && ((src[2] & 0xC0) == 0x80)) { |
---|
334 | /* |
---|
335 | * Three-byte-character lead byte followed by two trail bytes. |
---|
336 | */ |
---|
337 | |
---|
338 | *chPtr = (Tcl_UniChar) (((byte & 0x0F) << 12) |
---|
339 | | ((src[1] & 0x3F) << 6) | (src[2] & 0x3F)); |
---|
340 | return 3; |
---|
341 | } |
---|
342 | |
---|
343 | /* |
---|
344 | * A three-byte-character lead-byte not followed by two trail-bytes |
---|
345 | * represents itself. |
---|
346 | */ |
---|
347 | |
---|
348 | *chPtr = (Tcl_UniChar) byte; |
---|
349 | return 1; |
---|
350 | } |
---|
351 | #if TCL_UTF_MAX > 3 |
---|
352 | { |
---|
353 | int ch, total, trail; |
---|
354 | |
---|
355 | total = totalBytes[byte]; |
---|
356 | trail = total - 1; |
---|
357 | if (trail > 0) { |
---|
358 | ch = byte & (0x3F >> trail); |
---|
359 | do { |
---|
360 | src++; |
---|
361 | if ((*src & 0xC0) != 0x80) { |
---|
362 | *chPtr = byte; |
---|
363 | return 1; |
---|
364 | } |
---|
365 | ch <<= 6; |
---|
366 | ch |= (*src & 0x3F); |
---|
367 | trail--; |
---|
368 | } while (trail > 0); |
---|
369 | *chPtr = ch; |
---|
370 | return total; |
---|
371 | } |
---|
372 | } |
---|
373 | #endif |
---|
374 | |
---|
375 | *chPtr = (Tcl_UniChar) byte; |
---|
376 | return 1; |
---|
377 | } |
---|
378 | |
---|
379 | /* |
---|
380 | *--------------------------------------------------------------------------- |
---|
381 | * |
---|
382 | * Tcl_UtfToUniCharDString -- |
---|
383 | * |
---|
384 | * Convert the UTF-8 string to Unicode. |
---|
385 | * |
---|
386 | * Results: |
---|
387 | * The return value is a pointer to the Unicode representation of the |
---|
388 | * UTF-8 string. Storage for the return value is appended to the end of |
---|
389 | * dsPtr. The Unicode string is terminated with a Unicode NULL character. |
---|
390 | * |
---|
391 | * Side effects: |
---|
392 | * None. |
---|
393 | * |
---|
394 | *--------------------------------------------------------------------------- |
---|
395 | */ |
---|
396 | |
---|
397 | Tcl_UniChar * |
---|
398 | Tcl_UtfToUniCharDString( |
---|
399 | CONST char *src, /* UTF-8 string to convert to Unicode. */ |
---|
400 | int length, /* Length of UTF-8 string in bytes, or -1 for |
---|
401 | * strlen(). */ |
---|
402 | Tcl_DString *dsPtr) /* Unicode representation of string is |
---|
403 | * appended to this previously initialized |
---|
404 | * DString. */ |
---|
405 | { |
---|
406 | Tcl_UniChar *w, *wString; |
---|
407 | CONST char *p, *end; |
---|
408 | int oldLength; |
---|
409 | |
---|
410 | if (length < 0) { |
---|
411 | length = strlen(src); |
---|
412 | } |
---|
413 | |
---|
414 | /* |
---|
415 | * Unicode string length in Tcl_UniChars will be <= UTF-8 string length in |
---|
416 | * bytes. |
---|
417 | */ |
---|
418 | |
---|
419 | oldLength = Tcl_DStringLength(dsPtr); |
---|
420 | Tcl_DStringSetLength(dsPtr, |
---|
421 | (int) ((oldLength + length + 1) * sizeof(Tcl_UniChar))); |
---|
422 | wString = (Tcl_UniChar *) (Tcl_DStringValue(dsPtr) + oldLength); |
---|
423 | |
---|
424 | w = wString; |
---|
425 | end = src + length; |
---|
426 | for (p = src; p < end; ) { |
---|
427 | p += TclUtfToUniChar(p, w); |
---|
428 | w++; |
---|
429 | } |
---|
430 | *w = '\0'; |
---|
431 | Tcl_DStringSetLength(dsPtr, |
---|
432 | (oldLength + ((char *) w - (char *) wString))); |
---|
433 | |
---|
434 | return wString; |
---|
435 | } |
---|
436 | |
---|
437 | /* |
---|
438 | *--------------------------------------------------------------------------- |
---|
439 | * |
---|
440 | * Tcl_UtfCharComplete -- |
---|
441 | * |
---|
442 | * Determine if the UTF-8 string of the given length is long enough to be |
---|
443 | * decoded by Tcl_UtfToUniChar(). This does not ensure that the UTF-8 |
---|
444 | * string is properly formed. Equivalent to Plan 9 fullrune(). |
---|
445 | * |
---|
446 | * Results: |
---|
447 | * The return value is 0 if the string is not long enough, non-zero |
---|
448 | * otherwise. |
---|
449 | * |
---|
450 | * Side effects: |
---|
451 | * None. |
---|
452 | * |
---|
453 | *--------------------------------------------------------------------------- |
---|
454 | */ |
---|
455 | |
---|
456 | int |
---|
457 | Tcl_UtfCharComplete( |
---|
458 | CONST char *src, /* String to check if first few bytes contain |
---|
459 | * a complete UTF-8 character. */ |
---|
460 | int length) /* Length of above string in bytes. */ |
---|
461 | { |
---|
462 | int ch; |
---|
463 | |
---|
464 | ch = *((unsigned char *) src); |
---|
465 | return length >= totalBytes[ch]; |
---|
466 | } |
---|
467 | |
---|
468 | /* |
---|
469 | *--------------------------------------------------------------------------- |
---|
470 | * |
---|
471 | * Tcl_NumUtfChars -- |
---|
472 | * |
---|
473 | * Returns the number of characters (not bytes) in the UTF-8 string, not |
---|
474 | * including the terminating NULL byte. This is equivalent to Plan 9 |
---|
475 | * utflen() and utfnlen(). |
---|
476 | * |
---|
477 | * Results: |
---|
478 | * As above. |
---|
479 | * |
---|
480 | * Side effects: |
---|
481 | * None. |
---|
482 | * |
---|
483 | *--------------------------------------------------------------------------- |
---|
484 | */ |
---|
485 | |
---|
486 | int |
---|
487 | Tcl_NumUtfChars( |
---|
488 | register CONST char *src, /* The UTF-8 string to measure. */ |
---|
489 | int length) /* The length of the string in bytes, or -1 |
---|
490 | * for strlen(string). */ |
---|
491 | { |
---|
492 | Tcl_UniChar ch; |
---|
493 | register Tcl_UniChar *chPtr = &ch; |
---|
494 | register int i; |
---|
495 | |
---|
496 | /* |
---|
497 | * The separate implementations are faster. |
---|
498 | * |
---|
499 | * Since this is a time-sensitive function, we also do the check for the |
---|
500 | * single-byte char case specially. |
---|
501 | */ |
---|
502 | |
---|
503 | i = 0; |
---|
504 | if (length < 0) { |
---|
505 | while (*src != '\0') { |
---|
506 | src += TclUtfToUniChar(src, chPtr); |
---|
507 | i++; |
---|
508 | } |
---|
509 | } else { |
---|
510 | register int n; |
---|
511 | |
---|
512 | while (length > 0) { |
---|
513 | if (UCHAR(*src) < 0xC0) { |
---|
514 | length--; |
---|
515 | src++; |
---|
516 | } else { |
---|
517 | n = Tcl_UtfToUniChar(src, chPtr); |
---|
518 | length -= n; |
---|
519 | src += n; |
---|
520 | } |
---|
521 | i++; |
---|
522 | } |
---|
523 | } |
---|
524 | return i; |
---|
525 | } |
---|
526 | |
---|
527 | /* |
---|
528 | *--------------------------------------------------------------------------- |
---|
529 | * |
---|
530 | * Tcl_UtfFindFirst -- |
---|
531 | * |
---|
532 | * Returns a pointer to the first occurance of the given Tcl_UniChar in |
---|
533 | * the NULL-terminated UTF-8 string. The NULL terminator is considered |
---|
534 | * part of the UTF-8 string. Equivalent to Plan 9 utfrune(). |
---|
535 | * |
---|
536 | * Results: |
---|
537 | * As above. If the Tcl_UniChar does not exist in the given string, the |
---|
538 | * return value is NULL. |
---|
539 | * |
---|
540 | * Side effects: |
---|
541 | * None. |
---|
542 | * |
---|
543 | *--------------------------------------------------------------------------- |
---|
544 | */ |
---|
545 | |
---|
546 | CONST char * |
---|
547 | Tcl_UtfFindFirst( |
---|
548 | CONST char *src, /* The UTF-8 string to be searched. */ |
---|
549 | int ch) /* The Tcl_UniChar to search for. */ |
---|
550 | { |
---|
551 | int len; |
---|
552 | Tcl_UniChar find; |
---|
553 | |
---|
554 | while (1) { |
---|
555 | len = TclUtfToUniChar(src, &find); |
---|
556 | if (find == ch) { |
---|
557 | return src; |
---|
558 | } |
---|
559 | if (*src == '\0') { |
---|
560 | return NULL; |
---|
561 | } |
---|
562 | src += len; |
---|
563 | } |
---|
564 | } |
---|
565 | |
---|
566 | /* |
---|
567 | *--------------------------------------------------------------------------- |
---|
568 | * |
---|
569 | * Tcl_UtfFindLast -- |
---|
570 | * |
---|
571 | * Returns a pointer to the last occurance of the given Tcl_UniChar in |
---|
572 | * the NULL-terminated UTF-8 string. The NULL terminator is considered |
---|
573 | * part of the UTF-8 string. Equivalent to Plan 9 utfrrune(). |
---|
574 | * |
---|
575 | * Results: |
---|
576 | * As above. If the Tcl_UniChar does not exist in the given string, the |
---|
577 | * return value is NULL. |
---|
578 | * |
---|
579 | * Side effects: |
---|
580 | * None. |
---|
581 | * |
---|
582 | *--------------------------------------------------------------------------- |
---|
583 | */ |
---|
584 | |
---|
585 | CONST char * |
---|
586 | Tcl_UtfFindLast( |
---|
587 | CONST char *src, /* The UTF-8 string to be searched. */ |
---|
588 | int ch) /* The Tcl_UniChar to search for. */ |
---|
589 | { |
---|
590 | int len; |
---|
591 | Tcl_UniChar find; |
---|
592 | CONST char *last; |
---|
593 | |
---|
594 | last = NULL; |
---|
595 | while (1) { |
---|
596 | len = TclUtfToUniChar(src, &find); |
---|
597 | if (find == ch) { |
---|
598 | last = src; |
---|
599 | } |
---|
600 | if (*src == '\0') { |
---|
601 | break; |
---|
602 | } |
---|
603 | src += len; |
---|
604 | } |
---|
605 | return last; |
---|
606 | } |
---|
607 | |
---|
608 | /* |
---|
609 | *--------------------------------------------------------------------------- |
---|
610 | * |
---|
611 | * Tcl_UtfNext -- |
---|
612 | * |
---|
613 | * Given a pointer to some current location in a UTF-8 string, move |
---|
614 | * forward one character. The caller must ensure that they are not asking |
---|
615 | * for the next character after the last character in the string. |
---|
616 | * |
---|
617 | * Results: |
---|
618 | * The return value is the pointer to the next character in the UTF-8 |
---|
619 | * string. |
---|
620 | * |
---|
621 | * Side effects: |
---|
622 | * None. |
---|
623 | * |
---|
624 | *--------------------------------------------------------------------------- |
---|
625 | */ |
---|
626 | |
---|
627 | CONST char * |
---|
628 | Tcl_UtfNext( |
---|
629 | CONST char *src) /* The current location in the string. */ |
---|
630 | { |
---|
631 | Tcl_UniChar ch; |
---|
632 | |
---|
633 | return src + TclUtfToUniChar(src, &ch); |
---|
634 | } |
---|
635 | |
---|
636 | /* |
---|
637 | *--------------------------------------------------------------------------- |
---|
638 | * |
---|
639 | * Tcl_UtfPrev -- |
---|
640 | * |
---|
641 | * Given a pointer to some current location in a UTF-8 string, move |
---|
642 | * backwards one character. This works correctly when the pointer is in |
---|
643 | * the middle of a UTF-8 character. |
---|
644 | * |
---|
645 | * Results: |
---|
646 | * The return value is a pointer to the previous character in the UTF-8 |
---|
647 | * string. If the current location was already at the beginning of the |
---|
648 | * string, the return value will also be a pointer to the beginning of |
---|
649 | * the string. |
---|
650 | * |
---|
651 | * Side effects: |
---|
652 | * None. |
---|
653 | * |
---|
654 | *--------------------------------------------------------------------------- |
---|
655 | */ |
---|
656 | |
---|
657 | CONST char * |
---|
658 | Tcl_UtfPrev( |
---|
659 | CONST char *src, /* The current location in the string. */ |
---|
660 | CONST char *start) /* Pointer to the beginning of the string, to |
---|
661 | * avoid going backwards too far. */ |
---|
662 | { |
---|
663 | CONST char *look; |
---|
664 | int i, byte; |
---|
665 | |
---|
666 | src--; |
---|
667 | look = src; |
---|
668 | for (i = 0; i < TCL_UTF_MAX; i++) { |
---|
669 | if (look < start) { |
---|
670 | if (src < start) { |
---|
671 | src = start; |
---|
672 | } |
---|
673 | break; |
---|
674 | } |
---|
675 | byte = *((unsigned char *) look); |
---|
676 | if (byte < 0x80) { |
---|
677 | break; |
---|
678 | } |
---|
679 | if (byte >= 0xC0) { |
---|
680 | return look; |
---|
681 | } |
---|
682 | look--; |
---|
683 | } |
---|
684 | return src; |
---|
685 | } |
---|
686 | |
---|
687 | /* |
---|
688 | *--------------------------------------------------------------------------- |
---|
689 | * |
---|
690 | * Tcl_UniCharAtIndex -- |
---|
691 | * |
---|
692 | * Returns the Unicode character represented at the specified character |
---|
693 | * (not byte) position in the UTF-8 string. |
---|
694 | * |
---|
695 | * Results: |
---|
696 | * As above. |
---|
697 | * |
---|
698 | * Side effects: |
---|
699 | * None. |
---|
700 | * |
---|
701 | *--------------------------------------------------------------------------- |
---|
702 | */ |
---|
703 | |
---|
704 | Tcl_UniChar |
---|
705 | Tcl_UniCharAtIndex( |
---|
706 | register CONST char *src, /* The UTF-8 string to dereference. */ |
---|
707 | register int index) /* The position of the desired character. */ |
---|
708 | { |
---|
709 | Tcl_UniChar ch; |
---|
710 | |
---|
711 | while (index >= 0) { |
---|
712 | index--; |
---|
713 | src += TclUtfToUniChar(src, &ch); |
---|
714 | } |
---|
715 | return ch; |
---|
716 | } |
---|
717 | |
---|
718 | /* |
---|
719 | *--------------------------------------------------------------------------- |
---|
720 | * |
---|
721 | * Tcl_UtfAtIndex -- |
---|
722 | * |
---|
723 | * Returns a pointer to the specified character (not byte) position in |
---|
724 | * the UTF-8 string. |
---|
725 | * |
---|
726 | * Results: |
---|
727 | * As above. |
---|
728 | * |
---|
729 | * Side effects: |
---|
730 | * None. |
---|
731 | * |
---|
732 | *--------------------------------------------------------------------------- |
---|
733 | */ |
---|
734 | |
---|
735 | CONST char * |
---|
736 | Tcl_UtfAtIndex( |
---|
737 | register CONST char *src, /* The UTF-8 string. */ |
---|
738 | register int index) /* The position of the desired character. */ |
---|
739 | { |
---|
740 | Tcl_UniChar ch; |
---|
741 | |
---|
742 | while (index > 0) { |
---|
743 | index--; |
---|
744 | src += TclUtfToUniChar(src, &ch); |
---|
745 | } |
---|
746 | return src; |
---|
747 | } |
---|
748 | |
---|
749 | /* |
---|
750 | *--------------------------------------------------------------------------- |
---|
751 | * |
---|
752 | * Tcl_UtfBackslash -- |
---|
753 | * |
---|
754 | * Figure out how to handle a backslash sequence. |
---|
755 | * |
---|
756 | * Results: |
---|
757 | * Stores the bytes represented by the backslash sequence in dst and |
---|
758 | * returns the number of bytes written to dst. At most TCL_UTF_MAX bytes |
---|
759 | * are written to dst; dst must have been large enough to accept those |
---|
760 | * bytes. If readPtr isn't NULL then it is filled in with a count of the |
---|
761 | * number of bytes in the backslash sequence. |
---|
762 | * |
---|
763 | * Side effects: |
---|
764 | * The maximum number of bytes it takes to represent a Unicode character |
---|
765 | * in UTF-8 is guaranteed to be less than the number of bytes used to |
---|
766 | * express the backslash sequence that represents that Unicode character. |
---|
767 | * If the target buffer into which the caller is going to store the bytes |
---|
768 | * that represent the Unicode character is at least as large as the |
---|
769 | * source buffer from which the backslashed sequence was extracted, no |
---|
770 | * buffer overruns should occur. |
---|
771 | * |
---|
772 | *--------------------------------------------------------------------------- |
---|
773 | */ |
---|
774 | |
---|
775 | int |
---|
776 | Tcl_UtfBackslash( |
---|
777 | CONST char *src, /* Points to the backslash character of a |
---|
778 | * backslash sequence. */ |
---|
779 | int *readPtr, /* Fill in with number of characters read from |
---|
780 | * src, unless NULL. */ |
---|
781 | char *dst) /* Filled with the bytes represented by the |
---|
782 | * backslash sequence. */ |
---|
783 | { |
---|
784 | #define LINE_LENGTH 128 |
---|
785 | int numRead; |
---|
786 | int result; |
---|
787 | |
---|
788 | result = TclParseBackslash(src, LINE_LENGTH, &numRead, dst); |
---|
789 | if (numRead == LINE_LENGTH) { |
---|
790 | /* |
---|
791 | * We ate a whole line. Pay the price of a strlen() |
---|
792 | */ |
---|
793 | |
---|
794 | result = TclParseBackslash(src, (int)strlen(src), &numRead, dst); |
---|
795 | } |
---|
796 | if (readPtr != NULL) { |
---|
797 | *readPtr = numRead; |
---|
798 | } |
---|
799 | return result; |
---|
800 | } |
---|
801 | |
---|
802 | /* |
---|
803 | *---------------------------------------------------------------------- |
---|
804 | * |
---|
805 | * Tcl_UtfToUpper -- |
---|
806 | * |
---|
807 | * Convert lowercase characters to uppercase characters in a UTF string |
---|
808 | * in place. The conversion may shrink the UTF string. |
---|
809 | * |
---|
810 | * Results: |
---|
811 | * Returns the number of bytes in the resulting string excluding the |
---|
812 | * trailing null. |
---|
813 | * |
---|
814 | * Side effects: |
---|
815 | * Writes a terminating null after the last converted character. |
---|
816 | * |
---|
817 | *---------------------------------------------------------------------- |
---|
818 | */ |
---|
819 | |
---|
820 | int |
---|
821 | Tcl_UtfToUpper( |
---|
822 | char *str) /* String to convert in place. */ |
---|
823 | { |
---|
824 | Tcl_UniChar ch, upChar; |
---|
825 | char *src, *dst; |
---|
826 | int bytes; |
---|
827 | |
---|
828 | /* |
---|
829 | * Iterate over the string until we hit the terminating null. |
---|
830 | */ |
---|
831 | |
---|
832 | src = dst = str; |
---|
833 | while (*src) { |
---|
834 | bytes = TclUtfToUniChar(src, &ch); |
---|
835 | upChar = Tcl_UniCharToUpper(ch); |
---|
836 | |
---|
837 | /* |
---|
838 | * To keep badly formed Utf strings from getting inflated by the |
---|
839 | * conversion (thereby causing a segfault), only copy the upper case |
---|
840 | * char to dst if its size is <= the original char. |
---|
841 | */ |
---|
842 | |
---|
843 | if (bytes < UtfCount(upChar)) { |
---|
844 | memcpy(dst, src, (size_t) bytes); |
---|
845 | dst += bytes; |
---|
846 | } else { |
---|
847 | dst += Tcl_UniCharToUtf(upChar, dst); |
---|
848 | } |
---|
849 | src += bytes; |
---|
850 | } |
---|
851 | *dst = '\0'; |
---|
852 | return (dst - str); |
---|
853 | } |
---|
854 | |
---|
855 | /* |
---|
856 | *---------------------------------------------------------------------- |
---|
857 | * |
---|
858 | * Tcl_UtfToLower -- |
---|
859 | * |
---|
860 | * Convert uppercase characters to lowercase characters in a UTF string |
---|
861 | * in place. The conversion may shrink the UTF string. |
---|
862 | * |
---|
863 | * Results: |
---|
864 | * Returns the number of bytes in the resulting string excluding the |
---|
865 | * trailing null. |
---|
866 | * |
---|
867 | * Side effects: |
---|
868 | * Writes a terminating null after the last converted character. |
---|
869 | * |
---|
870 | *---------------------------------------------------------------------- |
---|
871 | */ |
---|
872 | |
---|
873 | int |
---|
874 | Tcl_UtfToLower( |
---|
875 | char *str) /* String to convert in place. */ |
---|
876 | { |
---|
877 | Tcl_UniChar ch, lowChar; |
---|
878 | char *src, *dst; |
---|
879 | int bytes; |
---|
880 | |
---|
881 | /* |
---|
882 | * Iterate over the string until we hit the terminating null. |
---|
883 | */ |
---|
884 | |
---|
885 | src = dst = str; |
---|
886 | while (*src) { |
---|
887 | bytes = TclUtfToUniChar(src, &ch); |
---|
888 | lowChar = Tcl_UniCharToLower(ch); |
---|
889 | |
---|
890 | /* |
---|
891 | * To keep badly formed Utf strings from getting inflated by the |
---|
892 | * conversion (thereby causing a segfault), only copy the lower case |
---|
893 | * char to dst if its size is <= the original char. |
---|
894 | */ |
---|
895 | |
---|
896 | if (bytes < UtfCount(lowChar)) { |
---|
897 | memcpy(dst, src, (size_t) bytes); |
---|
898 | dst += bytes; |
---|
899 | } else { |
---|
900 | dst += Tcl_UniCharToUtf(lowChar, dst); |
---|
901 | } |
---|
902 | src += bytes; |
---|
903 | } |
---|
904 | *dst = '\0'; |
---|
905 | return (dst - str); |
---|
906 | } |
---|
907 | |
---|
908 | /* |
---|
909 | *---------------------------------------------------------------------- |
---|
910 | * |
---|
911 | * Tcl_UtfToTitle -- |
---|
912 | * |
---|
913 | * Changes the first character of a UTF string to title case or uppercase |
---|
914 | * and the rest of the string to lowercase. The conversion happens in |
---|
915 | * place and may shrink the UTF string. |
---|
916 | * |
---|
917 | * Results: |
---|
918 | * Returns the number of bytes in the resulting string excluding the |
---|
919 | * trailing null. |
---|
920 | * |
---|
921 | * Side effects: |
---|
922 | * Writes a terminating null after the last converted character. |
---|
923 | * |
---|
924 | *---------------------------------------------------------------------- |
---|
925 | */ |
---|
926 | |
---|
927 | int |
---|
928 | Tcl_UtfToTitle( |
---|
929 | char *str) /* String to convert in place. */ |
---|
930 | { |
---|
931 | Tcl_UniChar ch, titleChar, lowChar; |
---|
932 | char *src, *dst; |
---|
933 | int bytes; |
---|
934 | |
---|
935 | /* |
---|
936 | * Capitalize the first character and then lowercase the rest of the |
---|
937 | * characters until we get to a null. |
---|
938 | */ |
---|
939 | |
---|
940 | src = dst = str; |
---|
941 | |
---|
942 | if (*src) { |
---|
943 | bytes = TclUtfToUniChar(src, &ch); |
---|
944 | titleChar = Tcl_UniCharToTitle(ch); |
---|
945 | |
---|
946 | if (bytes < UtfCount(titleChar)) { |
---|
947 | memcpy(dst, src, (size_t) bytes); |
---|
948 | dst += bytes; |
---|
949 | } else { |
---|
950 | dst += Tcl_UniCharToUtf(titleChar, dst); |
---|
951 | } |
---|
952 | src += bytes; |
---|
953 | } |
---|
954 | while (*src) { |
---|
955 | bytes = TclUtfToUniChar(src, &ch); |
---|
956 | lowChar = Tcl_UniCharToLower(ch); |
---|
957 | |
---|
958 | if (bytes < UtfCount(lowChar)) { |
---|
959 | memcpy(dst, src, (size_t) bytes); |
---|
960 | dst += bytes; |
---|
961 | } else { |
---|
962 | dst += Tcl_UniCharToUtf(lowChar, dst); |
---|
963 | } |
---|
964 | src += bytes; |
---|
965 | } |
---|
966 | *dst = '\0'; |
---|
967 | return (dst - str); |
---|
968 | } |
---|
969 | |
---|
970 | /* |
---|
971 | *---------------------------------------------------------------------- |
---|
972 | * |
---|
973 | * TclpUtfNcmp2 -- |
---|
974 | * |
---|
975 | * Compare at most numBytes bytes of utf-8 strings cs and ct. Both cs and |
---|
976 | * ct are assumed to be at least numBytes bytes long. |
---|
977 | * |
---|
978 | * Results: |
---|
979 | * Return <0 if cs < ct, 0 if cs == ct, or >0 if cs > ct. |
---|
980 | * |
---|
981 | * Side effects: |
---|
982 | * None. |
---|
983 | * |
---|
984 | *---------------------------------------------------------------------- |
---|
985 | */ |
---|
986 | |
---|
987 | int |
---|
988 | TclpUtfNcmp2( |
---|
989 | CONST char *cs, /* UTF string to compare to ct. */ |
---|
990 | CONST char *ct, /* UTF string cs is compared to. */ |
---|
991 | unsigned long numBytes) /* Number of *bytes* to compare. */ |
---|
992 | { |
---|
993 | /* |
---|
994 | * We can't simply call 'memcmp(cs, ct, numBytes);' because we need to |
---|
995 | * check for Tcl's \xC0\x80 non-utf-8 null encoding. Otherwise utf-8 lexes |
---|
996 | * fine in the strcmp manner. |
---|
997 | */ |
---|
998 | |
---|
999 | register int result = 0; |
---|
1000 | |
---|
1001 | for ( ; numBytes != 0; numBytes--, cs++, ct++) { |
---|
1002 | if (*cs != *ct) { |
---|
1003 | result = UCHAR(*cs) - UCHAR(*ct); |
---|
1004 | break; |
---|
1005 | } |
---|
1006 | } |
---|
1007 | if (numBytes && ((UCHAR(*cs) == 0xC0) || (UCHAR(*ct) == 0xC0))) { |
---|
1008 | unsigned char c1, c2; |
---|
1009 | |
---|
1010 | c1 = ((UCHAR(*cs) == 0xC0) && (UCHAR(cs[1]) == 0x80)) ? 0 : UCHAR(*cs); |
---|
1011 | c2 = ((UCHAR(*ct) == 0xC0) && (UCHAR(ct[1]) == 0x80)) ? 0 : UCHAR(*ct); |
---|
1012 | result = (c1 - c2); |
---|
1013 | } |
---|
1014 | return result; |
---|
1015 | } |
---|
1016 | |
---|
1017 | /* |
---|
1018 | *---------------------------------------------------------------------- |
---|
1019 | * |
---|
1020 | * Tcl_UtfNcmp -- |
---|
1021 | * |
---|
1022 | * Compare at most numChars UTF chars of string cs to string ct. Both cs |
---|
1023 | * and ct are assumed to be at least numChars UTF chars long. |
---|
1024 | * |
---|
1025 | * Results: |
---|
1026 | * Return <0 if cs < ct, 0 if cs == ct, or >0 if cs > ct. |
---|
1027 | * |
---|
1028 | * Side effects: |
---|
1029 | * None. |
---|
1030 | * |
---|
1031 | *---------------------------------------------------------------------- |
---|
1032 | */ |
---|
1033 | |
---|
1034 | int |
---|
1035 | Tcl_UtfNcmp( |
---|
1036 | CONST char *cs, /* UTF string to compare to ct. */ |
---|
1037 | CONST char *ct, /* UTF string cs is compared to. */ |
---|
1038 | unsigned long numChars) /* Number of UTF chars to compare. */ |
---|
1039 | { |
---|
1040 | Tcl_UniChar ch1, ch2; |
---|
1041 | |
---|
1042 | /* |
---|
1043 | * Cannot use 'memcmp(cs, ct, n);' as byte representation of \u0000 (the |
---|
1044 | * pair of bytes 0xc0,0x80) is larger than byte representation of \u0001 |
---|
1045 | * (the byte 0x01.) |
---|
1046 | */ |
---|
1047 | |
---|
1048 | while (numChars-- > 0) { |
---|
1049 | /* |
---|
1050 | * n must be interpreted as chars, not bytes. This should be called |
---|
1051 | * only when both strings are of at least n chars long (no need for \0 |
---|
1052 | * check) |
---|
1053 | */ |
---|
1054 | |
---|
1055 | cs += TclUtfToUniChar(cs, &ch1); |
---|
1056 | ct += TclUtfToUniChar(ct, &ch2); |
---|
1057 | if (ch1 != ch2) { |
---|
1058 | return (ch1 - ch2); |
---|
1059 | } |
---|
1060 | } |
---|
1061 | return 0; |
---|
1062 | } |
---|
1063 | |
---|
1064 | /* |
---|
1065 | *---------------------------------------------------------------------- |
---|
1066 | * |
---|
1067 | * Tcl_UtfNcasecmp -- |
---|
1068 | * |
---|
1069 | * Compare at most numChars UTF chars of string cs to string ct case |
---|
1070 | * insensitive. Both cs and ct are assumed to be at least numChars UTF |
---|
1071 | * chars long. |
---|
1072 | * |
---|
1073 | * Results: |
---|
1074 | * Return <0 if cs < ct, 0 if cs == ct, or >0 if cs > ct. |
---|
1075 | * |
---|
1076 | * Side effects: |
---|
1077 | * None. |
---|
1078 | * |
---|
1079 | *---------------------------------------------------------------------- |
---|
1080 | */ |
---|
1081 | |
---|
1082 | int |
---|
1083 | Tcl_UtfNcasecmp( |
---|
1084 | CONST char *cs, /* UTF string to compare to ct. */ |
---|
1085 | CONST char *ct, /* UTF string cs is compared to. */ |
---|
1086 | unsigned long numChars) /* Number of UTF chars to compare. */ |
---|
1087 | { |
---|
1088 | Tcl_UniChar ch1, ch2; |
---|
1089 | while (numChars-- > 0) { |
---|
1090 | /* |
---|
1091 | * n must be interpreted as chars, not bytes. |
---|
1092 | * This should be called only when both strings are of |
---|
1093 | * at least n chars long (no need for \0 check) |
---|
1094 | */ |
---|
1095 | cs += TclUtfToUniChar(cs, &ch1); |
---|
1096 | ct += TclUtfToUniChar(ct, &ch2); |
---|
1097 | if (ch1 != ch2) { |
---|
1098 | ch1 = Tcl_UniCharToLower(ch1); |
---|
1099 | ch2 = Tcl_UniCharToLower(ch2); |
---|
1100 | if (ch1 != ch2) { |
---|
1101 | return (ch1 - ch2); |
---|
1102 | } |
---|
1103 | } |
---|
1104 | } |
---|
1105 | return 0; |
---|
1106 | } |
---|
1107 | |
---|
1108 | /* |
---|
1109 | *---------------------------------------------------------------------- |
---|
1110 | * |
---|
1111 | * Tcl_UniCharToUpper -- |
---|
1112 | * |
---|
1113 | * Compute the uppercase equivalent of the given Unicode character. |
---|
1114 | * |
---|
1115 | * Results: |
---|
1116 | * Returns the uppercase Unicode character. |
---|
1117 | * |
---|
1118 | * Side effects: |
---|
1119 | * None. |
---|
1120 | * |
---|
1121 | *---------------------------------------------------------------------- |
---|
1122 | */ |
---|
1123 | |
---|
1124 | Tcl_UniChar |
---|
1125 | Tcl_UniCharToUpper( |
---|
1126 | int ch) /* Unicode character to convert. */ |
---|
1127 | { |
---|
1128 | int info = GetUniCharInfo(ch); |
---|
1129 | |
---|
1130 | if (GetCaseType(info) & 0x04) { |
---|
1131 | return (Tcl_UniChar) (ch - GetDelta(info)); |
---|
1132 | } else { |
---|
1133 | return ch; |
---|
1134 | } |
---|
1135 | } |
---|
1136 | |
---|
1137 | /* |
---|
1138 | *---------------------------------------------------------------------- |
---|
1139 | * |
---|
1140 | * Tcl_UniCharToLower -- |
---|
1141 | * |
---|
1142 | * Compute the lowercase equivalent of the given Unicode character. |
---|
1143 | * |
---|
1144 | * Results: |
---|
1145 | * Returns the lowercase Unicode character. |
---|
1146 | * |
---|
1147 | * Side effects: |
---|
1148 | * None. |
---|
1149 | * |
---|
1150 | *---------------------------------------------------------------------- |
---|
1151 | */ |
---|
1152 | |
---|
1153 | Tcl_UniChar |
---|
1154 | Tcl_UniCharToLower( |
---|
1155 | int ch) /* Unicode character to convert. */ |
---|
1156 | { |
---|
1157 | int info = GetUniCharInfo(ch); |
---|
1158 | |
---|
1159 | if (GetCaseType(info) & 0x02) { |
---|
1160 | return (Tcl_UniChar) (ch + GetDelta(info)); |
---|
1161 | } else { |
---|
1162 | return ch; |
---|
1163 | } |
---|
1164 | } |
---|
1165 | |
---|
1166 | /* |
---|
1167 | *---------------------------------------------------------------------- |
---|
1168 | * |
---|
1169 | * Tcl_UniCharToTitle -- |
---|
1170 | * |
---|
1171 | * Compute the titlecase equivalent of the given Unicode character. |
---|
1172 | * |
---|
1173 | * Results: |
---|
1174 | * Returns the titlecase Unicode character. |
---|
1175 | * |
---|
1176 | * Side effects: |
---|
1177 | * None. |
---|
1178 | * |
---|
1179 | *---------------------------------------------------------------------- |
---|
1180 | */ |
---|
1181 | |
---|
1182 | Tcl_UniChar |
---|
1183 | Tcl_UniCharToTitle( |
---|
1184 | int ch) /* Unicode character to convert. */ |
---|
1185 | { |
---|
1186 | int info = GetUniCharInfo(ch); |
---|
1187 | int mode = GetCaseType(info); |
---|
1188 | |
---|
1189 | if (mode & 0x1) { |
---|
1190 | /* |
---|
1191 | * Subtract or add one depending on the original case. |
---|
1192 | */ |
---|
1193 | |
---|
1194 | return (Tcl_UniChar) (ch + ((mode & 0x4) ? -1 : 1)); |
---|
1195 | } else if (mode == 0x4) { |
---|
1196 | return (Tcl_UniChar) (ch - GetDelta(info)); |
---|
1197 | } else { |
---|
1198 | return ch; |
---|
1199 | } |
---|
1200 | } |
---|
1201 | |
---|
1202 | /* |
---|
1203 | *---------------------------------------------------------------------- |
---|
1204 | * |
---|
1205 | * Tcl_UniCharLen -- |
---|
1206 | * |
---|
1207 | * Find the length of a UniChar string. The str input must be null |
---|
1208 | * terminated. |
---|
1209 | * |
---|
1210 | * Results: |
---|
1211 | * Returns the length of str in UniChars (not bytes). |
---|
1212 | * |
---|
1213 | * Side effects: |
---|
1214 | * None. |
---|
1215 | * |
---|
1216 | *---------------------------------------------------------------------- |
---|
1217 | */ |
---|
1218 | |
---|
1219 | int |
---|
1220 | Tcl_UniCharLen( |
---|
1221 | CONST Tcl_UniChar *uniStr) /* Unicode string to find length of. */ |
---|
1222 | { |
---|
1223 | int len = 0; |
---|
1224 | |
---|
1225 | while (*uniStr != '\0') { |
---|
1226 | len++; |
---|
1227 | uniStr++; |
---|
1228 | } |
---|
1229 | return len; |
---|
1230 | } |
---|
1231 | |
---|
1232 | /* |
---|
1233 | *---------------------------------------------------------------------- |
---|
1234 | * |
---|
1235 | * Tcl_UniCharNcmp -- |
---|
1236 | * |
---|
1237 | * Compare at most numChars unichars of string ucs to string uct. |
---|
1238 | * Both ucs and uct are assumed to be at least numChars unichars long. |
---|
1239 | * |
---|
1240 | * Results: |
---|
1241 | * Return <0 if ucs < uct, 0 if ucs == uct, or >0 if ucs > uct. |
---|
1242 | * |
---|
1243 | * Side effects: |
---|
1244 | * None. |
---|
1245 | * |
---|
1246 | *---------------------------------------------------------------------- |
---|
1247 | */ |
---|
1248 | |
---|
1249 | int |
---|
1250 | Tcl_UniCharNcmp( |
---|
1251 | CONST Tcl_UniChar *ucs, /* Unicode string to compare to uct. */ |
---|
1252 | CONST Tcl_UniChar *uct, /* Unicode string ucs is compared to. */ |
---|
1253 | unsigned long numChars) /* Number of unichars to compare. */ |
---|
1254 | { |
---|
1255 | #ifdef WORDS_BIGENDIAN |
---|
1256 | /* |
---|
1257 | * We are definitely on a big-endian machine; memcmp() is safe |
---|
1258 | */ |
---|
1259 | |
---|
1260 | return memcmp(ucs, uct, numChars*sizeof(Tcl_UniChar)); |
---|
1261 | |
---|
1262 | #else /* !WORDS_BIGENDIAN */ |
---|
1263 | /* |
---|
1264 | * We can't simply call memcmp() because that is not lexically correct. |
---|
1265 | */ |
---|
1266 | |
---|
1267 | for ( ; numChars != 0; ucs++, uct++, numChars--) { |
---|
1268 | if (*ucs != *uct) { |
---|
1269 | return (*ucs - *uct); |
---|
1270 | } |
---|
1271 | } |
---|
1272 | return 0; |
---|
1273 | #endif /* WORDS_BIGENDIAN */ |
---|
1274 | } |
---|
1275 | |
---|
1276 | /* |
---|
1277 | *---------------------------------------------------------------------- |
---|
1278 | * |
---|
1279 | * Tcl_UniCharNcasecmp -- |
---|
1280 | * |
---|
1281 | * Compare at most numChars unichars of string ucs to string uct case |
---|
1282 | * insensitive. Both ucs and uct are assumed to be at least numChars |
---|
1283 | * unichars long. |
---|
1284 | * |
---|
1285 | * Results: |
---|
1286 | * Return <0 if ucs < uct, 0 if ucs == uct, or >0 if ucs > uct. |
---|
1287 | * |
---|
1288 | * Side effects: |
---|
1289 | * None. |
---|
1290 | * |
---|
1291 | *---------------------------------------------------------------------- |
---|
1292 | */ |
---|
1293 | |
---|
1294 | int |
---|
1295 | Tcl_UniCharNcasecmp( |
---|
1296 | CONST Tcl_UniChar *ucs, /* Unicode string to compare to uct. */ |
---|
1297 | CONST Tcl_UniChar *uct, /* Unicode string ucs is compared to. */ |
---|
1298 | unsigned long numChars) /* Number of unichars to compare. */ |
---|
1299 | { |
---|
1300 | for ( ; numChars != 0; numChars--, ucs++, uct++) { |
---|
1301 | if (*ucs != *uct) { |
---|
1302 | Tcl_UniChar lcs = Tcl_UniCharToLower(*ucs); |
---|
1303 | Tcl_UniChar lct = Tcl_UniCharToLower(*uct); |
---|
1304 | |
---|
1305 | if (lcs != lct) { |
---|
1306 | return (lcs - lct); |
---|
1307 | } |
---|
1308 | } |
---|
1309 | } |
---|
1310 | return 0; |
---|
1311 | } |
---|
1312 | |
---|
1313 | /* |
---|
1314 | *---------------------------------------------------------------------- |
---|
1315 | * |
---|
1316 | * Tcl_UniCharIsAlnum -- |
---|
1317 | * |
---|
1318 | * Test if a character is an alphanumeric Unicode character. |
---|
1319 | * |
---|
1320 | * Results: |
---|
1321 | * Returns 1 if character is alphanumeric. |
---|
1322 | * |
---|
1323 | * Side effects: |
---|
1324 | * None. |
---|
1325 | * |
---|
1326 | *---------------------------------------------------------------------- |
---|
1327 | */ |
---|
1328 | |
---|
1329 | int |
---|
1330 | Tcl_UniCharIsAlnum( |
---|
1331 | int ch) /* Unicode character to test. */ |
---|
1332 | { |
---|
1333 | register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1334 | |
---|
1335 | return (((ALPHA_BITS | DIGIT_BITS) >> category) & 1); |
---|
1336 | } |
---|
1337 | |
---|
1338 | /* |
---|
1339 | *---------------------------------------------------------------------- |
---|
1340 | * |
---|
1341 | * Tcl_UniCharIsAlpha -- |
---|
1342 | * |
---|
1343 | * Test if a character is an alphabetic Unicode character. |
---|
1344 | * |
---|
1345 | * Results: |
---|
1346 | * Returns 1 if character is alphabetic. |
---|
1347 | * |
---|
1348 | * Side effects: |
---|
1349 | * None. |
---|
1350 | * |
---|
1351 | *---------------------------------------------------------------------- |
---|
1352 | */ |
---|
1353 | |
---|
1354 | int |
---|
1355 | Tcl_UniCharIsAlpha( |
---|
1356 | int ch) /* Unicode character to test. */ |
---|
1357 | { |
---|
1358 | register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1359 | return ((ALPHA_BITS >> category) & 1); |
---|
1360 | } |
---|
1361 | |
---|
1362 | /* |
---|
1363 | *---------------------------------------------------------------------- |
---|
1364 | * |
---|
1365 | * Tcl_UniCharIsControl -- |
---|
1366 | * |
---|
1367 | * Test if a character is a Unicode control character. |
---|
1368 | * |
---|
1369 | * Results: |
---|
1370 | * Returns non-zero if character is a control. |
---|
1371 | * |
---|
1372 | * Side effects: |
---|
1373 | * None. |
---|
1374 | * |
---|
1375 | *---------------------------------------------------------------------- |
---|
1376 | */ |
---|
1377 | |
---|
1378 | int |
---|
1379 | Tcl_UniCharIsControl( |
---|
1380 | int ch) /* Unicode character to test. */ |
---|
1381 | { |
---|
1382 | return ((GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK) == CONTROL); |
---|
1383 | } |
---|
1384 | |
---|
1385 | /* |
---|
1386 | *---------------------------------------------------------------------- |
---|
1387 | * |
---|
1388 | * Tcl_UniCharIsDigit -- |
---|
1389 | * |
---|
1390 | * Test if a character is a numeric Unicode character. |
---|
1391 | * |
---|
1392 | * Results: |
---|
1393 | * Returns non-zero if character is a digit. |
---|
1394 | * |
---|
1395 | * Side effects: |
---|
1396 | * None. |
---|
1397 | * |
---|
1398 | *---------------------------------------------------------------------- |
---|
1399 | */ |
---|
1400 | |
---|
1401 | int |
---|
1402 | Tcl_UniCharIsDigit( |
---|
1403 | int ch) /* Unicode character to test. */ |
---|
1404 | { |
---|
1405 | return (GetUniCharInfo(ch)&UNICODE_CATEGORY_MASK) == DECIMAL_DIGIT_NUMBER; |
---|
1406 | } |
---|
1407 | |
---|
1408 | /* |
---|
1409 | *---------------------------------------------------------------------- |
---|
1410 | * |
---|
1411 | * Tcl_UniCharIsGraph -- |
---|
1412 | * |
---|
1413 | * Test if a character is any Unicode print character except space. |
---|
1414 | * |
---|
1415 | * Results: |
---|
1416 | * Returns non-zero if character is printable, but not space. |
---|
1417 | * |
---|
1418 | * Side effects: |
---|
1419 | * None. |
---|
1420 | * |
---|
1421 | *---------------------------------------------------------------------- |
---|
1422 | */ |
---|
1423 | |
---|
1424 | int |
---|
1425 | Tcl_UniCharIsGraph( |
---|
1426 | int ch) /* Unicode character to test. */ |
---|
1427 | { |
---|
1428 | register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1429 | return (((PRINT_BITS >> category) & 1) && ((unsigned char) ch != ' ')); |
---|
1430 | } |
---|
1431 | |
---|
1432 | /* |
---|
1433 | *---------------------------------------------------------------------- |
---|
1434 | * |
---|
1435 | * Tcl_UniCharIsLower -- |
---|
1436 | * |
---|
1437 | * Test if a character is a lowercase Unicode character. |
---|
1438 | * |
---|
1439 | * Results: |
---|
1440 | * Returns non-zero if character is lowercase. |
---|
1441 | * |
---|
1442 | * Side effects: |
---|
1443 | * None. |
---|
1444 | * |
---|
1445 | *---------------------------------------------------------------------- |
---|
1446 | */ |
---|
1447 | |
---|
1448 | int |
---|
1449 | Tcl_UniCharIsLower( |
---|
1450 | int ch) /* Unicode character to test. */ |
---|
1451 | { |
---|
1452 | return ((GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK) == LOWERCASE_LETTER); |
---|
1453 | } |
---|
1454 | |
---|
1455 | /* |
---|
1456 | *---------------------------------------------------------------------- |
---|
1457 | * |
---|
1458 | * Tcl_UniCharIsPrint -- |
---|
1459 | * |
---|
1460 | * Test if a character is a Unicode print character. |
---|
1461 | * |
---|
1462 | * Results: |
---|
1463 | * Returns non-zero if character is printable. |
---|
1464 | * |
---|
1465 | * Side effects: |
---|
1466 | * None. |
---|
1467 | * |
---|
1468 | *---------------------------------------------------------------------- |
---|
1469 | */ |
---|
1470 | |
---|
1471 | int |
---|
1472 | Tcl_UniCharIsPrint( |
---|
1473 | int ch) /* Unicode character to test. */ |
---|
1474 | { |
---|
1475 | register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1476 | return ((PRINT_BITS >> category) & 1); |
---|
1477 | } |
---|
1478 | |
---|
1479 | /* |
---|
1480 | *---------------------------------------------------------------------- |
---|
1481 | * |
---|
1482 | * Tcl_UniCharIsPunct -- |
---|
1483 | * |
---|
1484 | * Test if a character is a Unicode punctuation character. |
---|
1485 | * |
---|
1486 | * Results: |
---|
1487 | * Returns non-zero if character is punct. |
---|
1488 | * |
---|
1489 | * Side effects: |
---|
1490 | * None. |
---|
1491 | * |
---|
1492 | *---------------------------------------------------------------------- |
---|
1493 | */ |
---|
1494 | |
---|
1495 | int |
---|
1496 | Tcl_UniCharIsPunct( |
---|
1497 | int ch) /* Unicode character to test. */ |
---|
1498 | { |
---|
1499 | register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1500 | return ((PUNCT_BITS >> category) & 1); |
---|
1501 | } |
---|
1502 | |
---|
1503 | /* |
---|
1504 | *---------------------------------------------------------------------- |
---|
1505 | * |
---|
1506 | * Tcl_UniCharIsSpace -- |
---|
1507 | * |
---|
1508 | * Test if a character is a whitespace Unicode character. |
---|
1509 | * |
---|
1510 | * Results: |
---|
1511 | * Returns non-zero if character is a space. |
---|
1512 | * |
---|
1513 | * Side effects: |
---|
1514 | * None. |
---|
1515 | * |
---|
1516 | *---------------------------------------------------------------------- |
---|
1517 | */ |
---|
1518 | |
---|
1519 | int |
---|
1520 | Tcl_UniCharIsSpace( |
---|
1521 | int ch) /* Unicode character to test. */ |
---|
1522 | { |
---|
1523 | register int category; |
---|
1524 | |
---|
1525 | /* |
---|
1526 | * If the character is within the first 127 characters, just use the |
---|
1527 | * standard C function, otherwise consult the Unicode table. |
---|
1528 | */ |
---|
1529 | |
---|
1530 | if (ch < 0x80) { |
---|
1531 | return isspace(UCHAR(ch)); /* INTL: ISO space */ |
---|
1532 | } else { |
---|
1533 | category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1534 | return ((SPACE_BITS >> category) & 1); |
---|
1535 | } |
---|
1536 | } |
---|
1537 | |
---|
1538 | /* |
---|
1539 | *---------------------------------------------------------------------- |
---|
1540 | * |
---|
1541 | * Tcl_UniCharIsUpper -- |
---|
1542 | * |
---|
1543 | * Test if a character is a uppercase Unicode character. |
---|
1544 | * |
---|
1545 | * Results: |
---|
1546 | * Returns non-zero if character is uppercase. |
---|
1547 | * |
---|
1548 | * Side effects: |
---|
1549 | * None. |
---|
1550 | * |
---|
1551 | *---------------------------------------------------------------------- |
---|
1552 | */ |
---|
1553 | |
---|
1554 | int |
---|
1555 | Tcl_UniCharIsUpper( |
---|
1556 | int ch) /* Unicode character to test. */ |
---|
1557 | { |
---|
1558 | return ((GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK) == UPPERCASE_LETTER); |
---|
1559 | } |
---|
1560 | |
---|
1561 | /* |
---|
1562 | *---------------------------------------------------------------------- |
---|
1563 | * |
---|
1564 | * Tcl_UniCharIsWordChar -- |
---|
1565 | * |
---|
1566 | * Test if a character is alphanumeric or a connector punctuation mark. |
---|
1567 | * |
---|
1568 | * Results: |
---|
1569 | * Returns 1 if character is a word character. |
---|
1570 | * |
---|
1571 | * Side effects: |
---|
1572 | * None. |
---|
1573 | * |
---|
1574 | *---------------------------------------------------------------------- |
---|
1575 | */ |
---|
1576 | |
---|
1577 | int |
---|
1578 | Tcl_UniCharIsWordChar( |
---|
1579 | int ch) /* Unicode character to test. */ |
---|
1580 | { |
---|
1581 | register int category = (GetUniCharInfo(ch) & UNICODE_CATEGORY_MASK); |
---|
1582 | |
---|
1583 | return (((ALPHA_BITS | DIGIT_BITS | CONNECTOR_BITS) >> category) & 1); |
---|
1584 | } |
---|
1585 | |
---|
1586 | /* |
---|
1587 | *---------------------------------------------------------------------- |
---|
1588 | * |
---|
1589 | * Tcl_UniCharCaseMatch -- |
---|
1590 | * |
---|
1591 | * See if a particular Unicode string matches a particular pattern. |
---|
1592 | * Allows case insensitivity. This is the Unicode equivalent of the char* |
---|
1593 | * Tcl_StringCaseMatch. The UniChar strings must be NULL-terminated. |
---|
1594 | * This has no provision for counted UniChar strings, thus should not be |
---|
1595 | * used where NULLs are expected in the UniChar string. Use |
---|
1596 | * TclUniCharMatch where possible. |
---|
1597 | * |
---|
1598 | * Results: |
---|
1599 | * The return value is 1 if string matches pattern, and 0 otherwise. The |
---|
1600 | * matching operation permits the following special characters in the |
---|
1601 | * pattern: *?\[] (see the manual entry for details on what these mean). |
---|
1602 | * |
---|
1603 | * Side effects: |
---|
1604 | * None. |
---|
1605 | * |
---|
1606 | *---------------------------------------------------------------------- |
---|
1607 | */ |
---|
1608 | |
---|
1609 | int |
---|
1610 | Tcl_UniCharCaseMatch( |
---|
1611 | CONST Tcl_UniChar *uniStr, /* Unicode String. */ |
---|
1612 | CONST Tcl_UniChar *uniPattern, |
---|
1613 | /* Pattern, which may contain special |
---|
1614 | * characters. */ |
---|
1615 | int nocase) /* 0 for case sensitive, 1 for insensitive */ |
---|
1616 | { |
---|
1617 | Tcl_UniChar ch1, p; |
---|
1618 | |
---|
1619 | while (1) { |
---|
1620 | p = *uniPattern; |
---|
1621 | |
---|
1622 | /* |
---|
1623 | * See if we're at the end of both the pattern and the string. If so, |
---|
1624 | * we succeeded. If we're at the end of the pattern but not at the end |
---|
1625 | * of the string, we failed. |
---|
1626 | */ |
---|
1627 | |
---|
1628 | if (p == 0) { |
---|
1629 | return (*uniStr == 0); |
---|
1630 | } |
---|
1631 | if ((*uniStr == 0) && (p != '*')) { |
---|
1632 | return 0; |
---|
1633 | } |
---|
1634 | |
---|
1635 | /* |
---|
1636 | * Check for a "*" as the next pattern character. It matches any |
---|
1637 | * substring. We handle this by skipping all the characters up to the |
---|
1638 | * next matching one in the pattern, and then calling ourselves |
---|
1639 | * recursively for each postfix of string, until either we match or we |
---|
1640 | * reach the end of the string. |
---|
1641 | */ |
---|
1642 | |
---|
1643 | if (p == '*') { |
---|
1644 | /* |
---|
1645 | * Skip all successive *'s in the pattern |
---|
1646 | */ |
---|
1647 | |
---|
1648 | while (*(++uniPattern) == '*') { |
---|
1649 | /* empty body */ |
---|
1650 | } |
---|
1651 | p = *uniPattern; |
---|
1652 | if (p == 0) { |
---|
1653 | return 1; |
---|
1654 | } |
---|
1655 | if (nocase) { |
---|
1656 | p = Tcl_UniCharToLower(p); |
---|
1657 | } |
---|
1658 | while (1) { |
---|
1659 | /* |
---|
1660 | * Optimization for matching - cruise through the string |
---|
1661 | * quickly if the next char in the pattern isn't a special |
---|
1662 | * character |
---|
1663 | */ |
---|
1664 | |
---|
1665 | if ((p != '[') && (p != '?') && (p != '\\')) { |
---|
1666 | if (nocase) { |
---|
1667 | while (*uniStr && (p != *uniStr) |
---|
1668 | && (p != Tcl_UniCharToLower(*uniStr))) { |
---|
1669 | uniStr++; |
---|
1670 | } |
---|
1671 | } else { |
---|
1672 | while (*uniStr && (p != *uniStr)) { |
---|
1673 | uniStr++; |
---|
1674 | } |
---|
1675 | } |
---|
1676 | } |
---|
1677 | if (Tcl_UniCharCaseMatch(uniStr, uniPattern, nocase)) { |
---|
1678 | return 1; |
---|
1679 | } |
---|
1680 | if (*uniStr == 0) { |
---|
1681 | return 0; |
---|
1682 | } |
---|
1683 | uniStr++; |
---|
1684 | } |
---|
1685 | } |
---|
1686 | |
---|
1687 | /* |
---|
1688 | * Check for a "?" as the next pattern character. It matches any |
---|
1689 | * single character. |
---|
1690 | */ |
---|
1691 | |
---|
1692 | if (p == '?') { |
---|
1693 | uniPattern++; |
---|
1694 | uniStr++; |
---|
1695 | continue; |
---|
1696 | } |
---|
1697 | |
---|
1698 | /* |
---|
1699 | * Check for a "[" as the next pattern character. It is followed by a |
---|
1700 | * list of characters that are acceptable, or by a range (two |
---|
1701 | * characters separated by "-"). |
---|
1702 | */ |
---|
1703 | |
---|
1704 | if (p == '[') { |
---|
1705 | Tcl_UniChar startChar, endChar; |
---|
1706 | |
---|
1707 | uniPattern++; |
---|
1708 | ch1 = (nocase ? Tcl_UniCharToLower(*uniStr) : *uniStr); |
---|
1709 | uniStr++; |
---|
1710 | while (1) { |
---|
1711 | if ((*uniPattern == ']') || (*uniPattern == 0)) { |
---|
1712 | return 0; |
---|
1713 | } |
---|
1714 | startChar = (nocase ? Tcl_UniCharToLower(*uniPattern) |
---|
1715 | : *uniPattern); |
---|
1716 | uniPattern++; |
---|
1717 | if (*uniPattern == '-') { |
---|
1718 | uniPattern++; |
---|
1719 | if (*uniPattern == 0) { |
---|
1720 | return 0; |
---|
1721 | } |
---|
1722 | endChar = (nocase ? Tcl_UniCharToLower(*uniPattern) |
---|
1723 | : *uniPattern); |
---|
1724 | uniPattern++; |
---|
1725 | if (((startChar <= ch1) && (ch1 <= endChar)) |
---|
1726 | || ((endChar <= ch1) && (ch1 <= startChar))) { |
---|
1727 | /* |
---|
1728 | * Matches ranges of form [a-z] or [z-a]. |
---|
1729 | */ |
---|
1730 | break; |
---|
1731 | } |
---|
1732 | } else if (startChar == ch1) { |
---|
1733 | break; |
---|
1734 | } |
---|
1735 | } |
---|
1736 | while (*uniPattern != ']') { |
---|
1737 | if (*uniPattern == 0) { |
---|
1738 | uniPattern--; |
---|
1739 | break; |
---|
1740 | } |
---|
1741 | uniPattern++; |
---|
1742 | } |
---|
1743 | uniPattern++; |
---|
1744 | continue; |
---|
1745 | } |
---|
1746 | |
---|
1747 | /* |
---|
1748 | * If the next pattern character is '\', just strip off the '\' so we |
---|
1749 | * do exact matching on the character that follows. |
---|
1750 | */ |
---|
1751 | |
---|
1752 | if (p == '\\') { |
---|
1753 | if (*(++uniPattern) == '\0') { |
---|
1754 | return 0; |
---|
1755 | } |
---|
1756 | } |
---|
1757 | |
---|
1758 | /* |
---|
1759 | * There's no special character. Just make sure that the next bytes of |
---|
1760 | * each string match. |
---|
1761 | */ |
---|
1762 | |
---|
1763 | if (nocase) { |
---|
1764 | if (Tcl_UniCharToLower(*uniStr) != |
---|
1765 | Tcl_UniCharToLower(*uniPattern)) { |
---|
1766 | return 0; |
---|
1767 | } |
---|
1768 | } else if (*uniStr != *uniPattern) { |
---|
1769 | return 0; |
---|
1770 | } |
---|
1771 | uniStr++; |
---|
1772 | uniPattern++; |
---|
1773 | } |
---|
1774 | } |
---|
1775 | |
---|
1776 | /* |
---|
1777 | *---------------------------------------------------------------------- |
---|
1778 | * |
---|
1779 | * TclUniCharMatch -- |
---|
1780 | * |
---|
1781 | * See if a particular Unicode string matches a particular pattern. |
---|
1782 | * Allows case insensitivity. This is the Unicode equivalent of the char* |
---|
1783 | * Tcl_StringCaseMatch. This variant of Tcl_UniCharCaseMatch uses counted |
---|
1784 | * Strings, so embedded NULLs are allowed. |
---|
1785 | * |
---|
1786 | * Results: |
---|
1787 | * The return value is 1 if string matches pattern, and 0 otherwise. The |
---|
1788 | * matching operation permits the following special characters in the |
---|
1789 | * pattern: *?\[] (see the manual entry for details on what these mean). |
---|
1790 | * |
---|
1791 | * Side effects: |
---|
1792 | * None. |
---|
1793 | * |
---|
1794 | *---------------------------------------------------------------------- |
---|
1795 | */ |
---|
1796 | |
---|
1797 | int |
---|
1798 | TclUniCharMatch( |
---|
1799 | CONST Tcl_UniChar *string, /* Unicode String. */ |
---|
1800 | int strLen, /* Length of String */ |
---|
1801 | CONST Tcl_UniChar *pattern, /* Pattern, which may contain special |
---|
1802 | * characters. */ |
---|
1803 | int ptnLen, /* Length of Pattern */ |
---|
1804 | int nocase) /* 0 for case sensitive, 1 for insensitive */ |
---|
1805 | { |
---|
1806 | CONST Tcl_UniChar *stringEnd, *patternEnd; |
---|
1807 | Tcl_UniChar p; |
---|
1808 | |
---|
1809 | stringEnd = string + strLen; |
---|
1810 | patternEnd = pattern + ptnLen; |
---|
1811 | |
---|
1812 | while (1) { |
---|
1813 | /* |
---|
1814 | * See if we're at the end of both the pattern and the string. If so, |
---|
1815 | * we succeeded. If we're at the end of the pattern but not at the end |
---|
1816 | * of the string, we failed. |
---|
1817 | */ |
---|
1818 | |
---|
1819 | if (pattern == patternEnd) { |
---|
1820 | return (string == stringEnd); |
---|
1821 | } |
---|
1822 | p = *pattern; |
---|
1823 | if ((string == stringEnd) && (p != '*')) { |
---|
1824 | return 0; |
---|
1825 | } |
---|
1826 | |
---|
1827 | /* |
---|
1828 | * Check for a "*" as the next pattern character. It matches any |
---|
1829 | * substring. We handle this by skipping all the characters up to the |
---|
1830 | * next matching one in the pattern, and then calling ourselves |
---|
1831 | * recursively for each postfix of string, until either we match or we |
---|
1832 | * reach the end of the string. |
---|
1833 | */ |
---|
1834 | |
---|
1835 | if (p == '*') { |
---|
1836 | /* |
---|
1837 | * Skip all successive *'s in the pattern. |
---|
1838 | */ |
---|
1839 | |
---|
1840 | while (*(++pattern) == '*') { |
---|
1841 | /* empty body */ |
---|
1842 | } |
---|
1843 | if (pattern == patternEnd) { |
---|
1844 | return 1; |
---|
1845 | } |
---|
1846 | p = *pattern; |
---|
1847 | if (nocase) { |
---|
1848 | p = Tcl_UniCharToLower(p); |
---|
1849 | } |
---|
1850 | while (1) { |
---|
1851 | /* |
---|
1852 | * Optimization for matching - cruise through the string |
---|
1853 | * quickly if the next char in the pattern isn't a special |
---|
1854 | * character. |
---|
1855 | */ |
---|
1856 | |
---|
1857 | if ((p != '[') && (p != '?') && (p != '\\')) { |
---|
1858 | if (nocase) { |
---|
1859 | while ((string < stringEnd) && (p != *string) |
---|
1860 | && (p != Tcl_UniCharToLower(*string))) { |
---|
1861 | string++; |
---|
1862 | } |
---|
1863 | } else { |
---|
1864 | while ((string < stringEnd) && (p != *string)) { |
---|
1865 | string++; |
---|
1866 | } |
---|
1867 | } |
---|
1868 | } |
---|
1869 | if (TclUniCharMatch(string, stringEnd - string, |
---|
1870 | pattern, patternEnd - pattern, nocase)) { |
---|
1871 | return 1; |
---|
1872 | } |
---|
1873 | if (string == stringEnd) { |
---|
1874 | return 0; |
---|
1875 | } |
---|
1876 | string++; |
---|
1877 | } |
---|
1878 | } |
---|
1879 | |
---|
1880 | /* |
---|
1881 | * Check for a "?" as the next pattern character. It matches any |
---|
1882 | * single character. |
---|
1883 | */ |
---|
1884 | |
---|
1885 | if (p == '?') { |
---|
1886 | pattern++; |
---|
1887 | string++; |
---|
1888 | continue; |
---|
1889 | } |
---|
1890 | |
---|
1891 | /* |
---|
1892 | * Check for a "[" as the next pattern character. It is followed by a |
---|
1893 | * list of characters that are acceptable, or by a range (two |
---|
1894 | * characters separated by "-"). |
---|
1895 | */ |
---|
1896 | |
---|
1897 | if (p == '[') { |
---|
1898 | Tcl_UniChar ch1, startChar, endChar; |
---|
1899 | |
---|
1900 | pattern++; |
---|
1901 | ch1 = (nocase ? Tcl_UniCharToLower(*string) : *string); |
---|
1902 | string++; |
---|
1903 | while (1) { |
---|
1904 | if ((*pattern == ']') || (pattern == patternEnd)) { |
---|
1905 | return 0; |
---|
1906 | } |
---|
1907 | startChar = (nocase ? Tcl_UniCharToLower(*pattern) : *pattern); |
---|
1908 | pattern++; |
---|
1909 | if (*pattern == '-') { |
---|
1910 | pattern++; |
---|
1911 | if (pattern == patternEnd) { |
---|
1912 | return 0; |
---|
1913 | } |
---|
1914 | endChar = (nocase ? Tcl_UniCharToLower(*pattern) |
---|
1915 | : *pattern); |
---|
1916 | pattern++; |
---|
1917 | if (((startChar <= ch1) && (ch1 <= endChar)) |
---|
1918 | || ((endChar <= ch1) && (ch1 <= startChar))) { |
---|
1919 | /* |
---|
1920 | * Matches ranges of form [a-z] or [z-a]. |
---|
1921 | */ |
---|
1922 | break; |
---|
1923 | } |
---|
1924 | } else if (startChar == ch1) { |
---|
1925 | break; |
---|
1926 | } |
---|
1927 | } |
---|
1928 | while (*pattern != ']') { |
---|
1929 | if (pattern == patternEnd) { |
---|
1930 | pattern--; |
---|
1931 | break; |
---|
1932 | } |
---|
1933 | pattern++; |
---|
1934 | } |
---|
1935 | pattern++; |
---|
1936 | continue; |
---|
1937 | } |
---|
1938 | |
---|
1939 | /* |
---|
1940 | * If the next pattern character is '\', just strip off the '\' so we |
---|
1941 | * do exact matching on the character that follows. |
---|
1942 | */ |
---|
1943 | |
---|
1944 | if (p == '\\') { |
---|
1945 | if (++pattern == patternEnd) { |
---|
1946 | return 0; |
---|
1947 | } |
---|
1948 | } |
---|
1949 | |
---|
1950 | /* |
---|
1951 | * There's no special character. Just make sure that the next bytes of |
---|
1952 | * each string match. |
---|
1953 | */ |
---|
1954 | |
---|
1955 | if (nocase) { |
---|
1956 | if (Tcl_UniCharToLower(*string) != Tcl_UniCharToLower(*pattern)) { |
---|
1957 | return 0; |
---|
1958 | } |
---|
1959 | } else if (*string != *pattern) { |
---|
1960 | return 0; |
---|
1961 | } |
---|
1962 | string++; |
---|
1963 | pattern++; |
---|
1964 | } |
---|
1965 | } |
---|
1966 | |
---|
1967 | /* |
---|
1968 | * Local Variables: |
---|
1969 | * mode: c |
---|
1970 | * c-basic-offset: 4 |
---|
1971 | * fill-column: 78 |
---|
1972 | * End: |
---|
1973 | */ |
---|