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GenericParameter.cs: override Module properly
[mcs.git] / class / corlib / System.Text / UTF7Encoding.cs
blob60f716fad54f5e450bb6b776fc836886330a5b25
1 /*
2 * UTF7Encoding.cs - Implementation of the
3 * "System.Text.UTF7Encoding" class.
4 *
5 * Copyright (c) 2002 Southern Storm Software, Pty Ltd
6 * Copyright (c) 2003, 2004, Novell, Inc.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining
9 * a copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27 namespace System.Text
28 {
29
30 using System;
31 using System.Runtime.InteropServices;
32
33 [Serializable]
34 [ComVisible (true)]
35 [MonoLimitation ("Serialization format not compatible with .NET")]
36 #if ECMA_COMPAT
37 internal
38 #else
39 public
40 #endif
41 class UTF7Encoding : Encoding
42 {
43 // Magic number used by Windows for UTF-7.
44 internal const int UTF7_CODE_PAGE = 65000;
45
46 // Internal state.
47 private bool allowOptionals;
48
49 // Encoding rule table for 0x00-0x7F.
50 // 0 - full encode, 1 - direct, 2 - optional, 3 - encode plus.
51 private static readonly byte[] encodingRules = {
52 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, // 00
53 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 10
54 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 2, 3, 1, 1, 1, 1, // 20
55 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, // 30
56
57 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 40
58 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 0, 2, 2, 2, // 50
59 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 60
60 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 0, 0, // 70
61 };
62
63 // Characters to use to encode 6-bit values in base64.
64 private const String base64Chars =
65 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
66
67 // Map bytes in base64 to 6-bit values.
68 private static readonly sbyte[] base64Values = {
69 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 00
70 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 10
71 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, // 20
72 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, // 30
73
74 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 40
75 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, // 50
76 -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 60
77 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, // 70
78
79 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 80
80 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 90
81 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // A0
82 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // B0
83
84 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // C0
85 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // D0
86 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // E0
87 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // F0
88 };
89
90 // Constructors.
91 public UTF7Encoding ()
92 : this (false)
93 {
94 }
95
96 public UTF7Encoding (bool allowOptionals)
97 : base (UTF7_CODE_PAGE)
98 {
99 this.allowOptionals = allowOptionals;
100
101 body_name = "utf-7";
102 encoding_name = "Unicode (UTF-7)";
103 header_name = "utf-7";
104 is_mail_news_display = true;
105 is_mail_news_save = true;
106 web_name = "utf-7";
107 windows_code_page = UnicodeEncoding.UNICODE_CODE_PAGE;
108 }
109
110 [ComVisible (false)]
111 public override int GetHashCode ()
112 {
113 int basis = base.GetHashCode ();
114 return allowOptionals ? -basis : basis;
115 }
116
117 [ComVisible(false)]
118 public override bool Equals (object value)
119 {
120 UTF7Encoding e = value as UTF7Encoding;
121 if (e == null)
122 return false;
123 return allowOptionals == e.allowOptionals &&
124 EncoderFallback.Equals (e.EncoderFallback) &&
125 DecoderFallback.Equals (e.DecoderFallback);
126 }
127
128 // Internal version of "GetByteCount" that can handle
129 // a rolling state between calls.
130 private static int InternalGetByteCount
131 (char[] chars, int index, int count, bool flush,
132 int leftOver, bool isInShifted, bool allowOptionals)
133 {
134 // Validate the parameters.
135 if (chars == null) {
136 throw new ArgumentNullException ("chars");
137 }
138 if (index < 0 || index > chars.Length) {
139 throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
140 }
141 if (count < 0 || count > (chars.Length - index)) {
142 throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
143 }
144
145 // Determine the length of the output.
146 int length = 0;
147 int leftOverSize = (leftOver >> 8);
148 byte[] rules = encodingRules;
149 int ch, rule;
150 while (count > 0) {
151 ch = (int)(chars[index++]);
152 --count;
153 if (ch < 0x0080) {
154 rule = rules[ch];
155 } else {
156 rule = 0;
157 }
158 switch (rule) {
159 case 0:
160 // Handle characters that must be fully encoded.
161 if ( !isInShifted ) {
162 ++length;
163 leftOverSize = 0;
164 isInShifted = true;
165 }
166 leftOverSize += 16;
167 while (leftOverSize >= 6) {
168 ++length;
169 leftOverSize -= 6;
170 }
171 break;
172 case 1:
173 // The character is encoded as itself.
174 if (isInShifted) {
175 if (leftOverSize != 0) {
176 // Flush the previous encoded sequence.
177 ++length;
178 leftOverSize = 0;
179 }
180 // Count the "-" (sequence terminator)
181 ++length;
182 isInShifted = false;
183 }
184 ++length;
185 break;
186 case 2:
187 // The character may need to be encoded.
188 if (allowOptionals) {
189 goto case 1;
190 } else {
191 goto case 0;
192 }
193 // Not reached.
194 case 3:
195 // Encode the plus sign as "+-".
196 if (isInShifted) {
197 if (leftOverSize != 0) {
198 // Flush the previous encoded sequence.
199 ++length;
200 leftOverSize = 0;
201 }
202 // Count the "-" (sequence terminator)
203 ++length;
204 isInShifted = false;
205 }
206 length += 2;
207 break;
208 }
209 }
210 if (isInShifted && flush) {
211 if (leftOverSize != 0)
212 {
213 // Flush the previous encoded sequence.
214 ++length;
215 }
216 // Count the "-" (sequence terminator)
217 ++length;
218 }
219
220 // Return the length to the caller.
221 return length;
222 }
223
224 // Get the number of bytes needed to encode a character buffer.
225 public override int GetByteCount (char[] chars, int index, int count)
226 {
227 return InternalGetByteCount (chars, index, count, true, 0, false, allowOptionals);
228 }
229
230 // Internal version of "GetBytes" that can handle a
231 // rolling state between calls.
232 private static int InternalGetBytes
233 (char[] chars, int charIndex, int charCount,
234 byte[] bytes, int byteIndex, bool flush,
235 ref int leftOver, ref bool isInShifted, bool allowOptionals)
236 {
237 // Validate the parameters.
238 if (chars == null) {
239 throw new ArgumentNullException ("chars");
240 }
241 if (bytes == null) {
242 throw new ArgumentNullException ("bytes");
243 }
244 if (charIndex < 0 || charIndex > chars.Length) {
245 throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
246 }
247 if (charCount < 0 || charCount > (chars.Length - charIndex)) {
248 throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_Array"));
249 }
250 if (byteIndex < 0 || byteIndex > bytes.Length) {
251 throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
252 }
253
254 // Convert the characters.
255 int posn = byteIndex;
256 int byteLength = bytes.Length;
257 int leftOverSize = (leftOver >> 8);
258 int leftOverBits = (leftOver & 0xFF);
259 byte[] rules = encodingRules;
260 String base64 = base64Chars;
261 int ch, rule;
262 while (charCount > 0) {
263 ch = (int)(chars[charIndex++]);
264 --charCount;
265 if (ch < 0x0080) {
266 rule = rules[ch];
267 } else {
268 rule = 0;
269 }
270 switch (rule) {
271 case 0:
272 // Handle characters that must be fully encoded.
273 if (!isInShifted) {
274 if (posn >= byteLength) {
275 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
276 }
277 // Start the sequence
278 bytes[posn++] = (byte)'+';
279 isInShifted = true;
280 leftOverSize = 0;
281 }
282 leftOverBits = ((leftOverBits << 16) | ch);
283 leftOverSize += 16;
284 while (leftOverSize >= 6) {
285 if (posn >= byteLength) {
286 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
287 }
288 leftOverSize -= 6;
289 bytes[posn++] = (byte)(base64 [leftOverBits >> leftOverSize]);
290 leftOverBits &= ((1 << leftOverSize) - 1);
291 }
292 break;
293 case 1:
294 // The character is encoded as itself.
295 if (isInShifted) {
296 if (leftOverSize != 0) {
297 // Flush the previous encoded sequence.
298 if ((posn + 1) > byteLength) {
299 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
300 }
301 bytes[posn++] = (byte)(base64 [leftOverBits << (6 - leftOverSize)]);
302 }
303 if ((posn + 1) > byteLength) {
304 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
305 }
306 // Terminate the sequence
307 bytes[posn++] = (byte)'-';
308 isInShifted = false;
309 leftOverSize = 0;
310 leftOverBits = 0;
311 }
312 if (posn >= byteLength) {
313 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
314 }
315 bytes[posn++] = (byte)ch;
316 break;
317 case 2:
318 // The character may need to be encoded.
319 if (allowOptionals) {
320 goto case 1;
321 } else {
322 goto case 0;
323 }
324 // Not reached.
325 case 3:
326 // Encode the plus sign as "+-".
327 if (isInShifted) {
328 if (leftOverSize != 0) {
329 // Flush the previous encoded sequence.
330 if ((posn + 1) > byteLength) {
331 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
332 }
333 bytes[posn++] = (byte)(base64 [leftOverBits << (6 - leftOverSize)]);
334 }
335 if ((posn + 1) > byteLength) {
336 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
337 }
338 // Terminate the sequence
339 bytes[posn++] = (byte)'-';
340 isInShifted = false;
341 leftOverSize = 0;
342 leftOverBits = 0;
343 }
344 if ((posn + 2) > byteLength) {
345 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
346 }
347 bytes[posn++] = (byte)'+';
348 bytes[posn++] = (byte)'-';
349 break;
350 }
351 }
352 if (isInShifted && flush) {
353 // Flush the previous encoded sequence.
354 if (leftOverSize != 0) {
355 if ((posn + 1) > byteLength) {
356 throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
357 }
358 bytes[posn++] = (byte)(base64 [leftOverBits << (6 - leftOverSize)]);
359 }
360 // Terminate the sequence
361 bytes[posn++] = (byte)'-';
362 leftOverSize = 0;
363 leftOverBits = 0;
364 isInShifted = false;
365 }
366 leftOver = ((leftOverSize << 8) | leftOverBits);
367
368 // Return the length to the caller.
369 return posn - byteIndex;
370 }
371
372 // Get the bytes that result from encoding a character buffer.
373 public override int GetBytes (char[] chars, int charIndex, int charCount,
374 byte[] bytes, int byteIndex)
375 {
376 int leftOver = 0;
377 bool isInShifted = false;
378 return InternalGetBytes (chars, charIndex, charCount, bytes, byteIndex, true,
379 ref leftOver, ref isInShifted, allowOptionals);
380 }
381
382 // Internal version of "GetCharCount" that can handle
383 // a rolling state between call.s
384 private static int InternalGetCharCount
385 (byte[] bytes, int index, int count, int leftOver)
386 {
387 // Validate the parameters.
388 if (bytes == null) {
389 throw new ArgumentNullException ("bytes");
390 }
391 if (index < 0 || index > bytes.Length) {
392 throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
393 }
394 if (count < 0 || count > (bytes.Length - index)) {
395 throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
396 }
397
398 // Determine the length of the result.
399 int length = 0;
400 int byteval;
401 bool normal = ((leftOver & 0x01000000) == 0);
402 bool prevIsPlus = ((leftOver & 0x02000000) != 0);
403 int leftOverSize = ((leftOver >> 16) & 0xFF);
404 sbyte[] base64 = base64Values;
405 while (count > 0) {
406 byteval = (int)(bytes[index++]);
407 --count;
408 if (normal) {
409 if (byteval != '+') {
410 // Directly-encoded character.
411 ++length;
412 } else {
413 // Start of a base64-encoded character.
414 normal = false;
415 prevIsPlus = true;
416 }
417 } else {
418 // Process the next byte in a base64 sequence.
419 if (byteval == (int)'-') {
420 // End of a base64 sequence.
421 if (prevIsPlus) {
422 ++length;
423 }
424 leftOverSize = 0;
425 normal = true;
426 } else if (base64 [byteval] != -1) {
427 // Extra character in a base64 sequence.
428 leftOverSize += 6;
429 if (leftOverSize >= 16) {
430 ++length;
431 leftOverSize -= 16;
432 }
433 } else {
434 ++length;
435 normal = true;
436 leftOverSize = 0;
437 }
438 prevIsPlus = false;
439 }
440 }
441
442 // Return the final length to the caller.
443 return length;
444 }
445
446 // Get the number of characters needed to decode a byte buffer.
447 public override int GetCharCount (byte[] bytes, int index, int count)
448 {
449 return InternalGetCharCount (bytes, index, count, 0);
450 }
451
452 // Internal version of "GetChars" that can handle a
453 // rolling state between calls.
454 private static int InternalGetChars (byte[] bytes, int byteIndex, int byteCount,
455 char[] chars, int charIndex, ref int leftOver)
456 {
457 // Validate the parameters.
458 if (bytes == null) {
459 throw new ArgumentNullException ("bytes");
460 }
461 if (chars == null) {
462 throw new ArgumentNullException ("chars");
463 }
464 if (byteIndex < 0 || byteIndex > bytes.Length) {
465 throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
466 }
467 if (byteCount < 0 || byteCount > (bytes.Length - byteIndex)) {
468 throw new ArgumentOutOfRangeException ("byteCount", _("ArgRange_Array"));
469 }
470 if (charIndex < 0 || charIndex > chars.Length) {
471 throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
472 }
473
474 // Convert the bytes into characters.
475 int posn = charIndex;
476 int charLength = chars.Length;
477 int byteval, b64value;
478 bool normal = ((leftOver & 0x01000000) == 0);
479 bool prevIsPlus = ((leftOver & 0x02000000) != 0);
480 bool afterHighSurrogate = ((leftOver & 0x04000000) != 0);
481 int leftOverSize = ((leftOver >> 16) & 0xFF);
482 int leftOverBits = (leftOver & 0xFFFF);
483 sbyte[] base64 = base64Values;
484 while (byteCount > 0) {
485 byteval = (int)(bytes[byteIndex++]);
486 --byteCount;
487 if (normal) {
488 if (byteval != '+') {
489 // Directly-encoded character.
490 if (posn >= charLength) {
491 throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
492 }
493 if (afterHighSurrogate) {
494 throw new ArgumentException (_("Arg_InvalidUTF7"), "chars");
495 }
496 chars[posn++] = (char)byteval;
497 } else {
498 // Start of a base64-encoded character.
499 normal = false;
500 prevIsPlus = true;
501 }
502 } else {
503 // Process the next byte in a base64 sequence.
504 if (byteval == (int)'-') {
505 // End of a base64 sequence.
506 if (prevIsPlus) {
507 if (posn >= charLength) {
508 throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
509 }
510 if (afterHighSurrogate) {
511 throw new ArgumentException (_("Arg_InvalidUTF7"), "chars");
512 }
513 chars[posn++] = '+';
514 }
515 // RFC1642 Rule #2
516 // When decoding, any bits at the end of the Modified Base64 sequence that
517 // do not constitute a complete 16-bit Unicode character are discarded.
518 // If such discarded bits are non-zero the sequence is ill-formed.
519 normal = true;
520 leftOverSize = 0;
521 leftOverBits = 0;
522 }
523 else if ((b64value = base64[byteval]) != -1)
524 {
525 // Extra character in a base64 sequence.
526 leftOverBits = (leftOverBits << 6) | b64value;
527 leftOverSize += 6;
528 if (leftOverSize >= 16) {
529 if (posn >= charLength) {
530 throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
531 }
532 leftOverSize -= 16;
533 char nextChar = (char)(leftOverBits >> leftOverSize);
534 if ((nextChar & 0xFC00) == 0xD800) {
535 afterHighSurrogate = true;
536 }
537 else if ((nextChar & 0xFC00) == 0xDC00) {
538 if (!afterHighSurrogate) {
539 throw new ArgumentException (_("Arg_InvalidUTF7"), "chars");
540 }
541 afterHighSurrogate = false;
542 }
543 chars[posn++] = nextChar;
544 leftOverBits &= ((1 << leftOverSize) - 1);
545 }
546 } else {
547 if (posn >= charLength) {
548 throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
549 }
550 if (afterHighSurrogate) {
551 throw new ArgumentException (_("Arg_InvalidUTF7"), "chars");
552 }
553 chars[posn++] = (char)byteval;
554 normal = true;
555 leftOverSize = 0;
556 leftOverBits = 0;
557 }
558 prevIsPlus = false;
559 }
560 }
561 leftOver = (leftOverBits | (leftOverSize << 16) |
562 (normal ? 0 : 0x01000000) |
563 (prevIsPlus ? 0x02000000 : 0) |
564 (afterHighSurrogate ? 0x04000000 : 0));
565
566 // Return the final length to the caller.
567 return posn - charIndex;
568 }
569
570 // Get the characters that result from decoding a byte buffer.
571 public override int GetChars (byte[] bytes, int byteIndex, int byteCount,
572 char[] chars, int charIndex)
573 {
574 int leftOver = 0;
575 int amount = InternalGetChars (bytes, byteIndex, byteCount, chars, charIndex, ref leftOver);
576 if ((leftOver & 0x04000000) != 0) {
577 throw new ArgumentException (_("Arg_InvalidUTF7"), "chars");
578 }
579 return amount;
580 }
581
582 // Get the maximum number of bytes needed to encode a
583 // specified number of characters.
584 public override int GetMaxByteCount (int charCount)
585 {
586 if (charCount < 0) {
587 throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_NonNegative"));
588 }
589 if (charCount == 0)
590 return 0;
591 return 8 * (int) (charCount / 3) + (charCount % 3) * 3 + 2;
592 }
593
594 // Get the maximum number of characters needed to decode a
595 // specified number of bytes.
596 public override int GetMaxCharCount (int byteCount)
597 {
598 if (byteCount < 0) {
599 throw new ArgumentOutOfRangeException ("byteCount", _("ArgRange_NonNegative"));
600 }
601 return byteCount;
602 }
603
604 // Get a UTF7-specific decoder that is attached to this instance.
605 public override Decoder GetDecoder ()
606 {
607 return new UTF7Decoder ();
608 }
609
610 // Get a UTF7-specific encoder that is attached to this instance.
611 public override Encoder GetEncoder ()
612 {
613 return new UTF7Encoder (allowOptionals);
614 }
615
616 // UTF-7 decoder implementation.
617 private sealed class UTF7Decoder : Decoder
618 {
619 // Internal state.
620 private int leftOver;
621
622 // Constructor.
623 public UTF7Decoder ()
624 {
625 leftOver = 0;
626 }
627
628 // Override inherited methods.
629 public override int GetCharCount (byte[] bytes, int index, int count)
630 {
631 return InternalGetCharCount (bytes, index, count, leftOver);
632 }
633 public override int GetChars (byte[] bytes, int byteIndex,
634 int byteCount, char[] chars,
635 int charIndex)
636 {
637 return InternalGetChars (bytes, byteIndex, byteCount, chars, charIndex, ref leftOver);
638 }
639
640 } // class UTF7Decoder
641
642 // UTF-7 encoder implementation.
643 private sealed class UTF7Encoder : Encoder
644 {
645 private bool allowOptionals;
646 private int leftOver = 0;
647 private bool isInShifted = false;
648
649 // Constructor.
650 public UTF7Encoder (bool allowOptionals)
651 {
652 this.allowOptionals = allowOptionals;
653 }
654
655 // Override inherited methods.
656 public override int GetByteCount (char[] chars, int index,
657 int count, bool flush)
658 {
659 return InternalGetByteCount
660 (chars, index, count, flush, leftOver, isInShifted, allowOptionals);
661 }
662 public override int GetBytes (char[] chars, int charIndex,
663 int charCount, byte[] bytes,
664 int byteIndex, bool flush)
665 {
666 return InternalGetBytes (chars, charIndex, charCount,
667 bytes, byteIndex, flush,
668 ref leftOver, ref isInShifted, allowOptionals);
669 }
670
671 } // class UTF7Encoder
672
673 // a bunch of practically missing implementations (but should just work)
674
675 [CLSCompliantAttribute (false)]
676 [ComVisible(false)]
677 public override unsafe int GetByteCount (char *chars, int count)
678 {
679 return base.GetByteCount (chars, count);
680 }
681
682 [ComVisible(false)]
683 public override int GetByteCount (string s)
684 {
685 return base.GetByteCount (s);
686 }
687
688 [ComVisible(false)]
689 [CLSCompliantAttribute (false)]
690 public override unsafe int GetBytes (char *chars, int charCount, byte* bytes, int byteCount)
691 {
692 return base.GetBytes (chars, charCount, bytes, byteCount);
693 }
694
695 [ComVisible(false)]
696 public override int GetBytes (string s, int charIndex, int charCount, byte [] bytes, int byteIndex)
697 {
698 return base.GetBytes (s, charIndex, charCount, bytes, byteIndex);
699 }
700
701 [ComVisible(false)]
702 [CLSCompliantAttribute (false)]
703 public override unsafe int GetCharCount (byte *bytes, int count)
704 {
705 return base.GetCharCount (bytes, count);
706 }
707
708 [ComVisible(false)]
709 [CLSCompliantAttribute (false)]
710 public override unsafe int GetChars (byte* bytes, int byteCount, char* chars, int charCount)
711 {
712 return base.GetChars (bytes, byteCount, chars, charCount);
713 }
714
715 [ComVisible(false)]
716 public override string GetString (byte [] bytes, int index, int count)
717 {
718 return base.GetString (bytes, index, count);
719 }
720
721 }; // class UTF7Encoding
722
723 }; // namespace System.Text
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