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ConvertUTF.c
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1 /*===--- ConvertUTF.c - Universal Character Names conversions ---------------===
2  *
3  * The LLVM Compiler Infrastructure
4  *
5  * This file is distributed under the University of Illinois Open Source
6  * License. See LICENSE.TXT for details.
7  *
8  *===------------------------------------------------------------------------=*/
9 /*
10  * Copyright 2001-2004 Unicode, Inc.
11  *
12  * Disclaimer
13  *
14  * This source code is provided as is by Unicode, Inc. No claims are
15  * made as to fitness for any particular purpose. No warranties of any
16  * kind are expressed or implied. The recipient agrees to determine
17  * applicability of information provided. If this file has been
18  * purchased on magnetic or optical media from Unicode, Inc., the
19  * sole remedy for any claim will be exchange of defective media
20  * within 90 days of receipt.
21  *
22  * Limitations on Rights to Redistribute This Code
23  *
24  * Unicode, Inc. hereby grants the right to freely use the information
25  * supplied in this file in the creation of products supporting the
26  * Unicode Standard, and to make copies of this file in any form
27  * for internal or external distribution as long as this notice
28  * remains attached.
29  */
30 
31 /* ---------------------------------------------------------------------
32 
33  Conversions between UTF32, UTF-16, and UTF-8. Source code file.
34  Author: Mark E. Davis, 1994.
35  Rev History: Rick McGowan, fixes & updates May 2001.
36  Sept 2001: fixed const & error conditions per
37  mods suggested by S. Parent & A. Lillich.
38  June 2002: Tim Dodd added detection and handling of incomplete
39  source sequences, enhanced error detection, added casts
40  to eliminate compiler warnings.
41  July 2003: slight mods to back out aggressive FFFE detection.
42  Jan 2004: updated switches in from-UTF8 conversions.
43  Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions.
44 
45  See the header file "ConvertUTF.h" for complete documentation.
46 
47 ------------------------------------------------------------------------ */
48 
49 
51 #ifdef CVTUTF_DEBUG
52 #include <stdio.h>
53 #endif
54 
55 static const int halfShift = 10; /* used for shifting by 10 bits */
56 
57 static const UTF32 halfBase = 0x0010000UL;
58 static const UTF32 halfMask = 0x3FFUL;
59 
60 #define UNI_SUR_HIGH_START (UTF32)0xD800
61 #define UNI_SUR_HIGH_END (UTF32)0xDBFF
62 #define UNI_SUR_LOW_START (UTF32)0xDC00
63 #define UNI_SUR_LOW_END (UTF32)0xDFFF
64 #define false 0
65 #define true 1
66 
67 /* --------------------------------------------------------------------- */
68 
69 /*
70  * Index into the table below with the first byte of a UTF-8 sequence to
71  * get the number of trailing bytes that are supposed to follow it.
72  * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
73  * left as-is for anyone who may want to do such conversion, which was
74  * allowed in earlier algorithms.
75  */
76 static const char trailingBytesForUTF8[256] = {
77  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
78  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
79  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
80  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
81  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
82  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
83  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,
84  2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
85 };
86 
87 /*
88  * Magic values subtracted from a buffer value during UTF8 conversion.
89  * This table contains as many values as there might be trailing bytes
90  * in a UTF-8 sequence.
91  */
92 static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL,
93  0x03C82080UL, 0xFA082080UL, 0x82082080UL };
94 
95 /*
96  * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
97  * into the first byte, depending on how many bytes follow. There are
98  * as many entries in this table as there are UTF-8 sequence types.
99  * (I.e., one byte sequence, two byte... etc.). Remember that sequencs
100  * for *legal* UTF-8 will be 4 or fewer bytes total.
101  */
102 static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
103 
104 /* --------------------------------------------------------------------- */
105 
106 /* The interface converts a whole buffer to avoid function-call overhead.
107  * Constants have been gathered. Loops & conditionals have been removed as
108  * much as possible for efficiency, in favor of drop-through switches.
109  * (See "Note A" at the bottom of the file for equivalent code.)
110  * If your compiler supports it, the "isLegalUTF8" call can be turned
111  * into an inline function.
112  */
113 
114 
115 /* --------------------------------------------------------------------- */
116 
118  const UTF32** sourceStart, const UTF32* sourceEnd,
119  UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
121  const UTF32* source = *sourceStart;
122  UTF16* target = *targetStart;
123  while (source < sourceEnd) {
124  UTF32 ch;
125  if (target >= targetEnd) {
126  result = targetExhausted; break;
127  }
128  ch = *source++;
129  if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
130  /* UTF-16 surrogate values are illegal in UTF-32; 0xffff or 0xfffe are both reserved values */
131  if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
132  if (flags == strictConversion) {
133  --source; /* return to the illegal value itself */
134  result = sourceIllegal;
135  break;
136  } else {
137  *target++ = UNI_REPLACEMENT_CHAR;
138  }
139  } else {
140  *target++ = (UTF16)ch; /* normal case */
141  }
142  } else if (ch > UNI_MAX_LEGAL_UTF32) {
143  if (flags == strictConversion) {
144  result = sourceIllegal;
145  } else {
146  *target++ = UNI_REPLACEMENT_CHAR;
147  }
148  } else {
149  /* target is a character in range 0xFFFF - 0x10FFFF. */
150  if (target + 1 >= targetEnd) {
151  --source; /* Back up source pointer! */
152  result = targetExhausted; break;
153  }
154  ch -= halfBase;
155  *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START);
156  *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START);
157  }
158  }
159  *sourceStart = source;
160  *targetStart = target;
161  return result;
162 }
163 
164 /* --------------------------------------------------------------------- */
165 
167  const UTF16** sourceStart, const UTF16* sourceEnd,
168  UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
170  const UTF16* source = *sourceStart;
171  UTF32* target = *targetStart;
172  UTF32 ch, ch2;
173  while (source < sourceEnd) {
174  const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
175  ch = *source++;
176  /* If we have a surrogate pair, convert to UTF32 first. */
177  if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
178  /* If the 16 bits following the high surrogate are in the source buffer... */
179  if (source < sourceEnd) {
180  ch2 = *source;
181  /* If it's a low surrogate, convert to UTF32. */
182  if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
183  ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
184  + (ch2 - UNI_SUR_LOW_START) + halfBase;
185  ++source;
186  } else if (flags == strictConversion) { /* it's an unpaired high surrogate */
187  --source; /* return to the illegal value itself */
188  result = sourceIllegal;
189  break;
190  }
191  } else { /* We don't have the 16 bits following the high surrogate. */
192  --source; /* return to the high surrogate */
193  result = sourceExhausted;
194  break;
195  }
196  } else if (flags == strictConversion) {
197  /* UTF-16 surrogate values are illegal in UTF-32 */
198  if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
199  --source; /* return to the illegal value itself */
200  result = sourceIllegal;
201  break;
202  }
203  }
204  if (target >= targetEnd) {
205  source = oldSource; /* Back up source pointer! */
206  result = targetExhausted; break;
207  }
208  *target++ = ch;
209  }
210  *sourceStart = source;
211  *targetStart = target;
212 #ifdef CVTUTF_DEBUG
213 if (result == sourceIllegal) {
214  fprintf(stderr, "ConvertUTF16toUTF32 illegal seq 0x%04x,%04x\n", ch, ch2);
215  fflush(stderr);
216 }
217 #endif
218  return result;
219 }
221  const UTF16** sourceStart, const UTF16* sourceEnd,
222  UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
224  const UTF16* source = *sourceStart;
225  UTF8* target = *targetStart;
226  while (source < sourceEnd) {
227  UTF32 ch;
228  unsigned short bytesToWrite = 0;
229  const UTF32 byteMask = 0xBF;
230  const UTF32 byteMark = 0x80;
231  const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
232  ch = *source++;
233  /* If we have a surrogate pair, convert to UTF32 first. */
234  if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
235  /* If the 16 bits following the high surrogate are in the source buffer... */
236  if (source < sourceEnd) {
237  UTF32 ch2 = *source;
238  /* If it's a low surrogate, convert to UTF32. */
239  if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
240  ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
241  + (ch2 - UNI_SUR_LOW_START) + halfBase;
242  ++source;
243  } else if (flags == strictConversion) { /* it's an unpaired high surrogate */
244  --source; /* return to the illegal value itself */
245  result = sourceIllegal;
246  break;
247  }
248  } else { /* We don't have the 16 bits following the high surrogate. */
249  --source; /* return to the high surrogate */
250  result = sourceExhausted;
251  break;
252  }
253  } else if (flags == strictConversion) {
254  /* UTF-16 surrogate values are illegal in UTF-32 */
255  if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
256  --source; /* return to the illegal value itself */
257  result = sourceIllegal;
258  break;
259  }
260  }
261  /* Figure out how many bytes the result will require */
262  if (ch < (UTF32)0x80) { bytesToWrite = 1;
263  } else if (ch < (UTF32)0x800) { bytesToWrite = 2;
264  } else if (ch < (UTF32)0x10000) { bytesToWrite = 3;
265  } else if (ch < (UTF32)0x110000) { bytesToWrite = 4;
266  } else { bytesToWrite = 3;
268  }
269 
270  target += bytesToWrite;
271  if (target > targetEnd) {
272  source = oldSource; /* Back up source pointer! */
273  target -= bytesToWrite; result = targetExhausted; break;
274  }
275  switch (bytesToWrite) { /* note: everything falls through. */
276  case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
277  case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
278  case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
279  case 1: *--target = (UTF8)(ch | firstByteMark[bytesToWrite]);
280  }
281  target += bytesToWrite;
282  }
283  *sourceStart = source;
284  *targetStart = target;
285  return result;
286 }
287 
288 /* --------------------------------------------------------------------- */
289 
291  const UTF32** sourceStart, const UTF32* sourceEnd,
292  UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
294  const UTF32* source = *sourceStart;
295  UTF8* target = *targetStart;
296  while (source < sourceEnd) {
297  UTF32 ch;
298  unsigned short bytesToWrite = 0;
299  const UTF32 byteMask = 0xBF;
300  const UTF32 byteMark = 0x80;
301  ch = *source++;
302  if (flags == strictConversion ) {
303  /* UTF-16 surrogate values are illegal in UTF-32 */
304  if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
305  --source; /* return to the illegal value itself */
306  result = sourceIllegal;
307  break;
308  }
309  }
310  /*
311  * Figure out how many bytes the result will require. Turn any
312  * illegally large UTF32 things (> Plane 17) into replacement chars.
313  */
314  if (ch < (UTF32)0x80) { bytesToWrite = 1;
315  } else if (ch < (UTF32)0x800) { bytesToWrite = 2;
316  } else if (ch < (UTF32)0x10000) { bytesToWrite = 3;
317  } else if (ch <= UNI_MAX_LEGAL_UTF32) { bytesToWrite = 4;
318  } else { bytesToWrite = 3;
320  result = sourceIllegal;
321  }
322 
323  target += bytesToWrite;
324  if (target > targetEnd) {
325  --source; /* Back up source pointer! */
326  target -= bytesToWrite; result = targetExhausted; break;
327  }
328  switch (bytesToWrite) { /* note: everything falls through. */
329  case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
330  case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
331  case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
332  case 1: *--target = (UTF8) (ch | firstByteMark[bytesToWrite]);
333  }
334  target += bytesToWrite;
335  }
336  *sourceStart = source;
337  *targetStart = target;
338  return result;
339 }
340 
341 /* --------------------------------------------------------------------- */
342 
343 /*
344  * Utility routine to tell whether a sequence of bytes is legal UTF-8.
345  * This must be called with the length pre-determined by the first byte.
346  * If not calling this from ConvertUTF8to*, then the length can be set by:
347  * length = trailingBytesForUTF8[*source]+1;
348  * and the sequence is illegal right away if there aren't that many bytes
349  * available.
350  * If presented with a length > 4, this returns false. The Unicode
351  * definition of UTF-8 goes up to 4-byte sequences.
352  */
353 
354 static Boolean isLegalUTF8(const UTF8 *source, int length) {
355  UTF8 a;
356  const UTF8 *srcptr = source+length;
357  switch (length) {
358  default: return false;
359  /* Everything else falls through when "true"... */
360  case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
361  case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
362  case 2: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
363 
364  switch (*source) {
365  /* no fall-through in this inner switch */
366  case 0xE0: if (a < 0xA0) return false; break;
367  case 0xED: if (a > 0x9F) return false; break;
368  case 0xF0: if (a < 0x90) return false; break;
369  case 0xF4: if (a > 0x8F) return false; break;
370  default: if (a < 0x80) return false;
371  }
372 
373  case 1: if (*source >= 0x80 && *source < 0xC2) return false;
374  }
375  if (*source > 0xF4) return false;
376  return true;
377 }
378 
379 /* --------------------------------------------------------------------- */
380 
381 /*
382  * Exported function to return whether a UTF-8 sequence is legal or not.
383  * This is not used here; it's just exported.
384  */
385 Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd) {
386  int length = trailingBytesForUTF8[*source]+1;
387  if (length > sourceEnd - source) {
388  return false;
389  }
390  return isLegalUTF8(source, length);
391 }
392 
393 /* --------------------------------------------------------------------- */
394 
395 /*
396  * Exported function to return the total number of bytes in a codepoint
397  * represented in UTF-8, given the value of the first byte.
398  */
399 unsigned getNumBytesForUTF8(UTF8 first) {
400  return trailingBytesForUTF8[first] + 1;
401 }
402 
403 /* --------------------------------------------------------------------- */
404 
405 /*
406  * Exported function to return whether a UTF-8 string is legal or not.
407  * This is not used here; it's just exported.
408  */
409 Boolean isLegalUTF8String(const UTF8 **source, const UTF8 *sourceEnd) {
410  while (*source != sourceEnd) {
411  int length = trailingBytesForUTF8[**source] + 1;
412  if (length > sourceEnd - *source || !isLegalUTF8(*source, length))
413  return false;
414  *source += length;
415  }
416  return true;
417 }
418 
419 /* --------------------------------------------------------------------- */
420 
422  const UTF8** sourceStart, const UTF8* sourceEnd,
423  UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
425  const UTF8* source = *sourceStart;
426  UTF16* target = *targetStart;
427  while (source < sourceEnd) {
428  UTF32 ch = 0;
429  unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
430  if (extraBytesToRead >= sourceEnd - source) {
431  result = sourceExhausted; break;
432  }
433  /* Do this check whether lenient or strict */
434  if (!isLegalUTF8(source, extraBytesToRead+1)) {
435  result = sourceIllegal;
436  break;
437  }
438  /*
439  * The cases all fall through. See "Note A" below.
440  */
441  switch (extraBytesToRead) {
442  case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
443  case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
444  case 3: ch += *source++; ch <<= 6;
445  case 2: ch += *source++; ch <<= 6;
446  case 1: ch += *source++; ch <<= 6;
447  case 0: ch += *source++;
448  }
449  ch -= offsetsFromUTF8[extraBytesToRead];
450 
451  if (target >= targetEnd) {
452  source -= (extraBytesToRead+1); /* Back up source pointer! */
453  result = targetExhausted; break;
454  }
455  if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
456  /* UTF-16 surrogate values are illegal in UTF-32 */
457  if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
458  if (flags == strictConversion) {
459  source -= (extraBytesToRead+1); /* return to the illegal value itself */
460  result = sourceIllegal;
461  break;
462  } else {
463  *target++ = UNI_REPLACEMENT_CHAR;
464  }
465  } else {
466  *target++ = (UTF16)ch; /* normal case */
467  }
468  } else if (ch > UNI_MAX_UTF16) {
469  if (flags == strictConversion) {
470  result = sourceIllegal;
471  source -= (extraBytesToRead+1); /* return to the start */
472  break; /* Bail out; shouldn't continue */
473  } else {
474  *target++ = UNI_REPLACEMENT_CHAR;
475  }
476  } else {
477  /* target is a character in range 0xFFFF - 0x10FFFF. */
478  if (target + 1 >= targetEnd) {
479  source -= (extraBytesToRead+1); /* Back up source pointer! */
480  result = targetExhausted; break;
481  }
482  ch -= halfBase;
483  *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START);
484  *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START);
485  }
486  }
487  *sourceStart = source;
488  *targetStart = target;
489  return result;
490 }
491 
492 /* --------------------------------------------------------------------- */
493 
495  const UTF8** sourceStart, const UTF8* sourceEnd,
496  UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
498  const UTF8* source = *sourceStart;
499  UTF32* target = *targetStart;
500  while (source < sourceEnd) {
501  UTF32 ch = 0;
502  unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
503  if (extraBytesToRead >= sourceEnd - source) {
504  result = sourceExhausted; break;
505  }
506  /* Do this check whether lenient or strict */
507  if (!isLegalUTF8(source, extraBytesToRead+1)) {
508  result = sourceIllegal;
509  break;
510  }
511  /*
512  * The cases all fall through. See "Note A" below.
513  */
514  switch (extraBytesToRead) {
515  case 5: ch += *source++; ch <<= 6;
516  case 4: ch += *source++; ch <<= 6;
517  case 3: ch += *source++; ch <<= 6;
518  case 2: ch += *source++; ch <<= 6;
519  case 1: ch += *source++; ch <<= 6;
520  case 0: ch += *source++;
521  }
522  ch -= offsetsFromUTF8[extraBytesToRead];
523 
524  if (target >= targetEnd) {
525  source -= (extraBytesToRead+1); /* Back up the source pointer! */
526  result = targetExhausted; break;
527  }
528  if (ch <= UNI_MAX_LEGAL_UTF32) {
529  /*
530  * UTF-16 surrogate values are illegal in UTF-32, and anything
531  * over Plane 17 (> 0x10FFFF) is illegal.
532  */
533  if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
534  if (flags == strictConversion) {
535  source -= (extraBytesToRead+1); /* return to the illegal value itself */
536  result = sourceIllegal;
537  break;
538  } else {
539  *target++ = UNI_REPLACEMENT_CHAR;
540  }
541  } else {
542  *target++ = ch;
543  }
544  } else { /* i.e., ch > UNI_MAX_LEGAL_UTF32 */
545  result = sourceIllegal;
546  *target++ = UNI_REPLACEMENT_CHAR;
547  }
548  }
549  *sourceStart = source;
550  *targetStart = target;
551  return result;
552 }
553 
554 /* ---------------------------------------------------------------------
555 
556  Note A.
557  The fall-through switches in UTF-8 reading code save a
558  temp variable, some decrements & conditionals. The switches
559  are equivalent to the following loop:
560  {
561  int tmpBytesToRead = extraBytesToRead+1;
562  do {
563  ch += *source++;
564  --tmpBytesToRead;
565  if (tmpBytesToRead) ch <<= 6;
566  } while (tmpBytesToRead > 0);
567  }
568  In UTF-8 writing code, the switches on "bytesToWrite" are
569  similarly unrolled loops.
570 
571  --------------------------------------------------------------------- */
#define UNI_MAX_BMP
Definition: ConvertUTF.h:108
static const UTF8 firstByteMark[7]
Definition: ConvertUTF.c:102
#define UNI_MAX_UTF16
Definition: ConvertUTF.h:109
#define UNI_MAX_LEGAL_UTF32
Definition: ConvertUTF.h:111
#define UNI_REPLACEMENT_CHAR
Definition: ConvertUTF.h:107
ConversionResult
Definition: ConvertUTF.h:118
ConversionResult ConvertUTF8toUTF16(const UTF8 **sourceStart, const UTF8 *sourceEnd, UTF16 **targetStart, UTF16 *targetEnd, ConversionFlags flags)
Definition: ConvertUTF.c:421
ConversionResult ConvertUTF8toUTF32(const UTF8 **sourceStart, const UTF8 *sourceEnd, UTF32 **targetStart, UTF32 *targetEnd, ConversionFlags flags)
Definition: ConvertUTF.c:494
ConversionResult ConvertUTF16toUTF8(const UTF16 **sourceStart, const UTF16 *sourceEnd, UTF8 **targetStart, UTF8 *targetEnd, ConversionFlags flags)
Definition: ConvertUTF.c:220
#define UNI_SUR_LOW_END
Definition: ConvertUTF.c:63
unsigned char UTF8
Definition: ConvertUTF.h:103
Boolean isLegalUTF8String(const UTF8 **source, const UTF8 *sourceEnd)
Definition: ConvertUTF.c:409
#define UNI_SUR_LOW_START
Definition: ConvertUTF.c:62
ConversionResult ConvertUTF16toUTF32(const UTF16 **sourceStart, const UTF16 *sourceEnd, UTF32 **targetStart, UTF32 *targetEnd, ConversionFlags flags)
Definition: ConvertUTF.c:166
unsigned getNumBytesForUTF8(UTF8 first)
Definition: ConvertUTF.c:399
unsigned short UTF16
Definition: ConvertUTF.h:102
#define UNI_SUR_HIGH_START
Definition: ConvertUTF.c:60
unsigned char Boolean
Definition: ConvertUTF.h:104
ConversionResult ConvertUTF32toUTF16(const UTF32 **sourceStart, const UTF32 *sourceEnd, UTF16 **targetStart, UTF16 *targetEnd, ConversionFlags flags)
Definition: ConvertUTF.c:117
static const int halfShift
Definition: ConvertUTF.c:55
int fprintf(FILE *stream, const char *format, ...);
unsigned int UTF32
Definition: ConvertUTF.h:101
int fflush(FILE *stream);
static const UTF32 offsetsFromUTF8[6]
Definition: ConvertUTF.c:92
static const char trailingBytesForUTF8[256]
Definition: ConvertUTF.c:76
static const UTF32 halfMask
Definition: ConvertUTF.c:58
ConversionFlags
Definition: ConvertUTF.h:125
ConversionResult ConvertUTF32toUTF8(const UTF32 **sourceStart, const UTF32 *sourceEnd, UTF8 **targetStart, UTF8 *targetEnd, ConversionFlags flags)
Definition: ConvertUTF.c:290
static const UTF32 halfBase
Definition: ConvertUTF.c:57
Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd)
Definition: ConvertUTF.c:385
static Boolean isLegalUTF8(const UTF8 *source, int length)
Definition: ConvertUTF.c:354
#define UNI_SUR_HIGH_END
Definition: ConvertUTF.c:61