* "System.Text.UTF7Encoding" class.
*
* Copyright (c) 2002 Southern Storm Software, Pty Ltd
+ * Copyright (c) 2003, 2004, Novell, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the "Software"),
using System;
[Serializable]
+[MonoTODO ("Fix serialization compatibility with MS.NET")]
#if ECMA_COMPAT
internal
#else
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, 63, // 20
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, // 30
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, // 40
- 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, // 50
- 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, // 60
- 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, -1, // 70
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 40
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, // 50
+ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 60
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, // 70
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 80
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 90
};
// Constructors.
- public UTF7Encoding()
- : base(UTF7_CODE_PAGE)
- {
- allowOptionals = false;
- }
- public UTF7Encoding(bool allowOptionals)
- : base(UTF7_CODE_PAGE)
- {
- this.allowOptionals = allowOptionals;
- }
+ public UTF7Encoding ()
+ : this (false)
+ {
+ }
+
+ public UTF7Encoding (bool allowOptionals)
+ : base (UTF7_CODE_PAGE)
+ {
+ this.allowOptionals = allowOptionals;
+
+ body_name = "utf-7";
+ encoding_name = "Unicode (UTF-7)";
+ header_name = "utf-7";
+ is_mail_news_display = true;
+ is_mail_news_save = true;
+ web_name = "utf-7";
+ windows_code_page = UnicodeEncoding.UNICODE_CODE_PAGE;
+ }
// Internal version of "GetByteCount" that can handle
// a rolling state between calls.
private static int InternalGetByteCount
(char[] chars, int index, int count, bool flush,
- int leftOver, bool allowOptionals)
- {
- // Validate the parameters.
- if(chars == null)
- {
- throw new ArgumentNullException("chars");
- }
- if(index < 0 || index > chars.Length)
- {
- throw new ArgumentOutOfRangeException
- ("index", _("ArgRange_Array"));
- }
- if(count < 0 || count > (chars.Length - index))
- {
- throw new ArgumentOutOfRangeException
- ("count", _("ArgRange_Array"));
- }
-
- // Determine the length of the output.
- int length = 0;
- int leftOverSize = (leftOver >> 8);
- byte[] rules = encodingRules;
- int ch, rule;
- while(count > 0)
- {
- ch = (int)(chars[index++]);
- --count;
- if(ch < 0x0080)
- {
- rule = rules[ch];
+ int leftOver, bool isInShifted, bool allowOptionals)
+ {
+ // Validate the parameters.
+ if (chars == null) {
+ throw new ArgumentNullException ("chars");
+ }
+ if (index < 0 || index > chars.Length) {
+ throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
+ }
+ if (count < 0 || count > (chars.Length - index)) {
+ throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
+ }
+
+ // Determine the length of the output.
+ int length = 0;
+ int leftOverSize = (leftOver >> 8);
+ byte[] rules = encodingRules;
+ int ch, rule;
+ while (count > 0) {
+ ch = (int)(chars[index++]);
+ --count;
+ if (ch < 0x0080) {
+ rule = rules[ch];
+ } else {
+ rule = 0;
+ }
+ switch (rule) {
+ case 0:
+ // Handle characters that must be fully encoded.
+ if ( !isInShifted ) {
+ ++length;
+ leftOverSize = 0;
+ isInShifted = true;
+ }
+ leftOverSize += 16;
+ while (leftOverSize >= 6) {
+ ++length;
+ leftOverSize -= 6;
+ }
+ break;
+ case 1:
+ // The character is encoded as itself.
+ if (isInShifted) {
+ if (leftOverSize != 0) {
+ // Flush the previous encoded sequence.
+ ++length;
+ leftOverSize = 0;
}
- else
- {
- rule = 0;
- }
- switch(rule)
- {
- case 0:
- {
- // Handle characters that must be fully encoded.
- if(leftOverSize == 0)
- {
- ++length;
- }
- leftOverSize += 16;
- while(leftOverSize >= 6)
- {
- ++length;
- leftOverSize -= 6;
- }
- }
- break;
-
- case 1:
- {
- // The character is encoded as itself.
- if(leftOverSize != 0)
- {
- // Flush the previous encoded sequence.
- length += 2;
- leftOverSize = 0;
- }
- ++length;
- }
- break;
-
- case 2:
- {
- // The character may need to be encoded.
- if(allowOptionals)
- {
- goto case 1;
- }
- else
- {
- goto case 0;
- }
- }
- // Not reached.
-
- case 3:
- {
- // Encode the plus sign as "+-".
- if(leftOverSize != 0)
- {
- // Flush the previous encoded sequence.
- length += 2;
- leftOverSize = 0;
- }
- length += 2;
- }
- break;
+ // Count the "-" (sequence terminator)
+ ++length;
+ isInShifted = false;
+ }
+ ++length;
+ break;
+ case 2:
+ // The character may need to be encoded.
+ if (allowOptionals) {
+ goto case 1;
+ } else {
+ goto case 0;
+ }
+ // Not reached.
+ case 3:
+ // Encode the plus sign as "+-".
+ if (isInShifted) {
+ if (leftOverSize != 0) {
+ // Flush the previous encoded sequence.
+ ++length;
+ leftOverSize = 0;
}
+ // Count the "-" (sequence terminator)
+ ++length;
+ isInShifted = false;
}
- if(leftOverSize != 0 && flush)
- {
- length += 2;
- }
-
- // Return the length to the caller.
- return length;
+ length += 2;
+ break;
}
-
- // Get the number of bytes needed to encode a character buffer.
- public override int GetByteCount(char[] chars, int index, int count)
+ }
+ if (isInShifted && flush) {
+ if (leftOverSize != 0)
{
- return InternalGetByteCount(chars, index, count,
- true, 0, allowOptionals);
+ // Flush the previous encoded sequence.
+ ++length;
}
+ // Count the "-" (sequence terminator)
+ ++length;
+ }
+
+ // Return the length to the caller.
+ return length;
+ }
+
+ // Get the number of bytes needed to encode a character buffer.
+ public override int GetByteCount (char[] chars, int index, int count)
+ {
+ return InternalGetByteCount (chars, index, count, true, 0, false, allowOptionals);
+ }
// Internal version of "GetBytes" that can handle a
// rolling state between calls.
private static int InternalGetBytes
(char[] chars, int charIndex, int charCount,
byte[] bytes, int byteIndex, bool flush,
- ref int leftOver, bool allowOptionals)
- {
- // Validate the parameters.
- if(chars == null)
- {
- throw new ArgumentNullException("chars");
- }
- if(bytes == null)
- {
- throw new ArgumentNullException("bytes");
- }
- if(charIndex < 0 || charIndex > chars.Length)
- {
- throw new ArgumentOutOfRangeException
- ("charIndex", _("ArgRange_Array"));
- }
- if(charCount < 0 || charCount > (chars.Length - charIndex))
- {
- throw new ArgumentOutOfRangeException
- ("charCount", _("ArgRange_Array"));
- }
- if(byteIndex < 0 || byteIndex > bytes.Length)
- {
- throw new ArgumentOutOfRangeException
- ("byteIndex", _("ArgRange_Array"));
- }
-
- // Convert the characters.
- int posn = byteIndex;
- int byteLength = bytes.Length;
- int leftOverSize = (leftOver >> 8);
- int leftOverBits = (leftOver & 0xFF);
- byte[] rules = encodingRules;
- String base64 = base64Chars;
- int ch, rule;
- while(charCount > 0)
- {
- ch = (int)(chars[charIndex++]);
- --charCount;
- if(ch < 0x0080)
- {
- rule = rules[ch];
+ ref int leftOver, ref bool isInShifted, bool allowOptionals)
+ {
+ // Validate the parameters.
+ if (chars == null) {
+ throw new ArgumentNullException ("chars");
+ }
+ if (bytes == null) {
+ throw new ArgumentNullException ("bytes");
+ }
+ if (charIndex < 0 || charIndex > chars.Length) {
+ throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
+ }
+ if (charCount < 0 || charCount > (chars.Length - charIndex)) {
+ throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_Array"));
+ }
+ if (byteIndex < 0 || byteIndex > bytes.Length) {
+ throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
+ }
+
+ // Convert the characters.
+ int posn = byteIndex;
+ int byteLength = bytes.Length;
+ int leftOverSize = (leftOver >> 8);
+ int leftOverBits = (leftOver & 0xFF);
+ byte[] rules = encodingRules;
+ String base64 = base64Chars;
+ int ch, rule;
+ while (charCount > 0) {
+ ch = (int)(chars[charIndex++]);
+ --charCount;
+ if (ch < 0x0080) {
+ rule = rules[ch];
+ } else {
+ rule = 0;
+ }
+ switch (rule) {
+ case 0:
+ // Handle characters that must be fully encoded.
+ if (!isInShifted) {
+ if (posn >= byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
}
- else
- {
- rule = 0;
+ // Start the sequence
+ bytes[posn++] = (byte)'+';
+ isInShifted = true;
+ leftOverSize = 0;
+ }
+ leftOverBits = ((leftOverBits << 16) | ch);
+ leftOverSize += 16;
+ while (leftOverSize >= 6) {
+ if (posn >= byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
}
- switch(rule)
- {
- case 0:
- {
- // Handle characters that must be fully encoded.
- if(leftOverSize == 0)
- {
- if(posn >= byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
- }
- bytes[posn++] = (byte)'+';
- }
- leftOverBits = ((leftOverBits << 16) | ch);
- leftOverSize += 16;
- while(leftOverSize >= 6)
- {
- if(posn >= byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
- }
- leftOverSize -= 6;
- bytes[posn++] = (byte)(base64
- [leftOverBits >> leftOverSize]);
- leftOverBits &= ((1 << leftOverSize) - 1);
- }
- }
- break;
-
- case 1:
- {
- // The character is encoded as itself.
- if(leftOverSize != 0)
- {
- // Flush the previous encoded sequence.
- if((posn + 2) > byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
- }
- bytes[posn++] = (byte)(base64
- [leftOverBits << (6 - leftOverSize)]);
- bytes[posn++] = (byte)'-';
- leftOverSize = 0;
- leftOverBits = 0;
- }
- if(posn >= byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
- }
- bytes[posn++] = (byte)ch;
- }
- break;
-
- case 2:
- {
- // The character may need to be encoded.
- if(allowOptionals)
- {
- goto case 1;
- }
- else
- {
- goto case 0;
- }
- }
- // Not reached.
-
- case 3:
- {
- // Encode the plus sign as "+-".
- if(leftOverSize != 0)
- {
- // Flush the previous encoded sequence.
- if((posn + 2) > byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
- }
- bytes[posn++] = (byte)(base64
- [leftOverBits << (6 - leftOverSize)]);
- bytes[posn++] = (byte)'-';
- leftOverSize = 0;
- leftOverBits = 0;
- }
- if((posn + 2) > byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
- }
- bytes[posn++] = (byte)'+';
- bytes[posn++] = (byte)'-';
+ leftOverSize -= 6;
+ bytes[posn++] = (byte)(base64 [leftOverBits >> leftOverSize]);
+ leftOverBits &= ((1 << leftOverSize) - 1);
+ }
+ break;
+ case 1:
+ // The character is encoded as itself.
+ if (isInShifted) {
+ if (leftOverSize != 0) {
+ // Flush the previous encoded sequence.
+ if ((posn + 1) > byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
}
- break;
+ bytes[posn++] = (byte)(base64 [leftOverBits << (6 - leftOverSize)]);
}
+ if ((posn + 1) > byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
+ }
+ // Terminate the sequence
+ bytes[posn++] = (byte)'-';
+ isInShifted = false;
+ leftOverSize = 0;
+ leftOverBits = 0;
}
- if(leftOverSize != 0 && flush)
- {
- if((posn + 2) > byteLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "bytes");
+ if (posn >= byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
+ }
+ bytes[posn++] = (byte)ch;
+ break;
+ case 2:
+ // The character may need to be encoded.
+ if (allowOptionals) {
+ goto case 1;
+ } else {
+ goto case 0;
+ }
+ // Not reached.
+ case 3:
+ // Encode the plus sign as "+-".
+ if (isInShifted) {
+ if (leftOverSize != 0) {
+ // Flush the previous encoded sequence.
+ if ((posn + 1) > byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
+ }
+ bytes[posn++] = (byte)(base64 [leftOverBits << (6 - leftOverSize)]);
}
- bytes[posn++] = (byte)(base64
- [leftOverBits << (6 - leftOverSize)]);
+ if ((posn + 1) > byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
+ }
+ // Terminate the sequence
bytes[posn++] = (byte)'-';
+ isInShifted = false;
leftOverSize = 0;
leftOverBits = 0;
}
- leftOver = ((leftOverSize << 8) | leftOverBits);
-
- // Return the length to the caller.
- return posn - byteIndex;
+ if ((posn + 2) > byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
+ }
+ bytes[posn++] = (byte)'+';
+ bytes[posn++] = (byte)'-';
+ break;
}
+ }
+ if (isInShifted && flush) {
+ // Flush the previous encoded sequence.
+ if (leftOverSize != 0) {
+ if ((posn + 1) > byteLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "bytes");
+ }
+ bytes[posn++] = (byte)(base64 [leftOverBits << (6 - leftOverSize)]);
+ }
+ // Terminate the sequence
+ bytes[posn++] = (byte)'-';
+ leftOverSize = 0;
+ leftOverBits = 0;
+ isInShifted = false;
+ }
+ leftOver = ((leftOverSize << 8) | leftOverBits);
+
+ // Return the length to the caller.
+ return posn - byteIndex;
+ }
// Get the bytes that result from encoding a character buffer.
- public override int GetBytes(char[] chars, int charIndex, int charCount,
+ public override int GetBytes (char[] chars, int charIndex, int charCount,
byte[] bytes, int byteIndex)
- {
- int leftOver = 0;
- return InternalGetBytes(chars, charIndex, charCount,
- bytes, byteIndex, true,
- ref leftOver, allowOptionals);
- }
+ {
+ int leftOver = 0;
+ bool isInShifted = false;
+ return InternalGetBytes (chars, charIndex, charCount, bytes, byteIndex, true,
+ ref leftOver, ref isInShifted, allowOptionals);
+ }
// Internal version of "GetCharCount" that can handle
// a rolling state between call.s
private static int InternalGetCharCount
(byte[] bytes, int index, int count, int leftOver)
- {
- // Validate the parameters.
- if(bytes == null)
- {
- throw new ArgumentNullException("bytes");
- }
- if(index < 0 || index > bytes.Length)
- {
- throw new ArgumentOutOfRangeException
- ("index", _("ArgRange_Array"));
- }
- if(count < 0 || count > (bytes.Length - index))
- {
- throw new ArgumentOutOfRangeException
- ("count", _("ArgRange_Array"));
- }
-
- // Determine the length of the result.
- int length = 0;
- int byteval, b64value;
- bool normal = ((leftOver & 0x01000000) == 0);
- bool prevIsPlus = ((leftOver & 0x02000000) != 0);
- int leftOverSize = ((leftOver >> 16) & 0xFF);
- sbyte[] base64 = base64Values;
- while(count > 0)
- {
- byteval = (int)(bytes[index++]);
- --count;
- if(normal)
- {
- if(byteval != '+')
- {
- // Directly-encoded character.
- ++length;
- }
- else
- {
- // Start of a base64-encoded character.
- normal = false;
- prevIsPlus = true;
- }
+ {
+ // Validate the parameters.
+ if (bytes == null) {
+ throw new ArgumentNullException ("bytes");
+ }
+ if (index < 0 || index > bytes.Length) {
+ throw new ArgumentOutOfRangeException ("index", _("ArgRange_Array"));
+ }
+ if (count < 0 || count > (bytes.Length - index)) {
+ throw new ArgumentOutOfRangeException ("count", _("ArgRange_Array"));
+ }
+
+ // Determine the length of the result.
+ int length = 0;
+ int byteval;
+ bool normal = ((leftOver & 0x01000000) == 0);
+ bool prevIsPlus = ((leftOver & 0x02000000) != 0);
+ int leftOverSize = ((leftOver >> 16) & 0xFF);
+ sbyte[] base64 = base64Values;
+ while (count > 0) {
+ byteval = (int)(bytes[index++]);
+ --count;
+ if (normal) {
+ if (byteval != '+') {
+ // Directly-encoded character.
+ ++length;
+ } else {
+ // Start of a base64-encoded character.
+ normal = false;
+ prevIsPlus = true;
+ }
+ } else {
+ // Process the next byte in a base64 sequence.
+ if (byteval == (int)'-') {
+ // End of a base64 sequence.
+ if (prevIsPlus) {
+ ++length;
+ leftOverSize = 0;
}
- else
- {
- // Process the next byte in a base64 sequence.
- if(byteval == (int)'-')
- {
- // End of a base64 sequence.
- if(prevIsPlus || leftOverSize > 0)
- {
- ++length;
- leftOverSize = 0;
- }
- normal = true;
- }
- else if((b64value = base64[byteval]) != -1)
- {
- // Extra character in a base64 sequence.
- leftOverSize += 6;
- if(leftOverSize >= 16)
- {
- ++length;
- leftOverSize -= 16;
- }
- }
- else
- {
- // Normal character terminating a base64 sequence.
- if(leftOverSize > 0)
- {
- ++length;
- leftOverSize = 0;
- }
- ++length;
- normal = true;
- }
- prevIsPlus = false;
+ normal = true;
+ } else if (base64 [byteval] != -1) {
+ // Extra character in a base64 sequence.
+ leftOverSize += 6;
+ if (leftOverSize >= 16) {
+ ++length;
+ leftOverSize -= 16;
}
+ } else {
+ ++length;
+ normal = true;
+ leftOverSize = 0;
}
-
- // Return the final length to the caller.
- return length;
+ prevIsPlus = false;
}
+ }
+
+ // Return the final length to the caller.
+ return length;
+ }
// Get the number of characters needed to decode a byte buffer.
- public override int GetCharCount(byte[] bytes, int index, int count)
- {
- return InternalGetCharCount(bytes, index, count, 0);
- }
+ public override int GetCharCount (byte[] bytes, int index, int count)
+ {
+ return InternalGetCharCount (bytes, index, count, 0);
+ }
// Internal version of "GetChars" that can handle a
// rolling state between calls.
- private static int InternalGetChars
- (byte[] bytes, int byteIndex, int byteCount,
+ private static int InternalGetChars (byte[] bytes, int byteIndex, int byteCount,
char[] chars, int charIndex, ref int leftOver)
- {
- // Validate the parameters.
- if(bytes == null)
- {
- throw new ArgumentNullException("bytes");
- }
- if(chars == null)
- {
- throw new ArgumentNullException("chars");
- }
- if(byteIndex < 0 || byteIndex > bytes.Length)
- {
- throw new ArgumentOutOfRangeException
- ("byteIndex", _("ArgRange_Array"));
- }
- if(byteCount < 0 || byteCount > (bytes.Length - byteIndex))
- {
- throw new ArgumentOutOfRangeException
- ("byteCount", _("ArgRange_Array"));
- }
- if(charIndex < 0 || charIndex > chars.Length)
- {
- throw new ArgumentOutOfRangeException
- ("charIndex", _("ArgRange_Array"));
- }
-
- // Convert the bytes into characters.
- int posn = charIndex;
- int charLength = chars.Length;
- int byteval, b64value;
- bool normal = ((leftOver & 0x01000000) == 0);
- bool prevIsPlus = ((leftOver & 0x02000000) != 0);
- int leftOverSize = ((leftOver >> 16) & 0xFF);
- int leftOverBits = (leftOver & 0xFFFF);
- sbyte[] base64 = base64Values;
- while(byteCount > 0)
- {
- byteval = (int)(bytes[byteIndex++]);
- --byteCount;
- if(normal)
- {
- if(byteval != '+')
- {
- // Directly-encoded character.
- if(posn >= charLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "chars");
- }
- chars[posn++] = (char)byteval;
- }
- else
- {
- // Start of a base64-encoded character.
- normal = false;
- prevIsPlus = true;
- }
+ {
+ // Validate the parameters.
+ if (bytes == null) {
+ throw new ArgumentNullException ("bytes");
+ }
+ if (chars == null) {
+ throw new ArgumentNullException ("chars");
+ }
+ if (byteIndex < 0 || byteIndex > bytes.Length) {
+ throw new ArgumentOutOfRangeException ("byteIndex", _("ArgRange_Array"));
+ }
+ if (byteCount < 0 || byteCount > (bytes.Length - byteIndex)) {
+ throw new ArgumentOutOfRangeException ("byteCount", _("ArgRange_Array"));
+ }
+ if (charIndex < 0 || charIndex > chars.Length) {
+ throw new ArgumentOutOfRangeException ("charIndex", _("ArgRange_Array"));
+ }
+
+ // Convert the bytes into characters.
+ int posn = charIndex;
+ int charLength = chars.Length;
+ int byteval, b64value;
+ bool normal = ((leftOver & 0x01000000) == 0);
+ bool prevIsPlus = ((leftOver & 0x02000000) != 0);
+ int leftOverSize = ((leftOver >> 16) & 0xFF);
+ int leftOverBits = (leftOver & 0xFFFF);
+ sbyte[] base64 = base64Values;
+ while (byteCount > 0) {
+ byteval = (int)(bytes[byteIndex++]);
+ --byteCount;
+ if (normal) {
+ if (byteval != '+') {
+ // Directly-encoded character.
+ if (posn >= charLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
}
- else
- {
- // Process the next byte in a base64 sequence.
- if(byteval == (int)'-')
- {
- // End of a base64 sequence.
- if(prevIsPlus)
- {
- if(posn >= charLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "chars");
- }
- chars[posn++] = '+';
- }
- else if(leftOverSize > 0)
- {
- if(posn >= charLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "chars");
- }
- chars[posn++] =
- (char)(leftOverBits << (16 - leftOverSize));
- leftOverSize = 0;
- leftOverBits = 0;
- }
- normal = true;
- }
- else if((b64value = base64[byteval]) != -1)
- {
- // Extra character in a base64 sequence.
- leftOverBits = (leftOverBits << 6) | b64value;
- leftOverSize += 6;
- if(leftOverSize >= 16)
- {
- if(posn >= charLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "chars");
- }
- leftOverSize -= 16;
- chars[posn++] =
- (char)(leftOverBits >> leftOverSize);
- leftOverBits &= ((1 << leftOverSize) - 1);
- }
+ chars[posn++] = (char)byteval;
+ } else {
+ // Start of a base64-encoded character.
+ normal = false;
+ prevIsPlus = true;
+ }
+ } else {
+ // Process the next byte in a base64 sequence.
+ if (byteval == (int)'-') {
+ // End of a base64 sequence.
+ if (prevIsPlus) {
+ if (posn >= charLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
}
- else
- {
- // Normal character terminating a base64 sequence.
- if(leftOverSize > 0)
- {
- if(posn >= charLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "chars");
- }
- chars[posn++] =
- (char)(leftOverBits << (16 - leftOverSize));
- leftOverSize = 0;
- leftOverBits = 0;
- }
- if(posn >= charLength)
- {
- throw new ArgumentException
- (_("Arg_InsufficientSpace"), "chars");
- }
- chars[posn++] = (char)byteval;
- normal = true;
+ chars[posn++] = '+';
+ }
+ // RFC1642 Rule #2
+ // When decoding, any bits at the end of the Modified Base64 sequence that
+ // do not constitute a complete 16-bit Unicode character are discarded.
+ // If such discarded bits are non-zero the sequence is ill-formed.
+ normal = true;
+ leftOverSize = 0;
+ leftOverBits = 0;
+ }
+ else if ((b64value = base64[byteval]) != -1)
+ {
+ // Extra character in a base64 sequence.
+ leftOverBits = (leftOverBits << 6) | b64value;
+ leftOverSize += 6;
+ if (leftOverSize >= 16) {
+ if (posn >= charLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
}
- prevIsPlus = false;
+ leftOverSize -= 16;
+ chars[posn++] = (char)(leftOverBits >> leftOverSize);
+ leftOverBits &= ((1 << leftOverSize) - 1);
}
+ } else {
+ if (posn >= charLength) {
+ throw new ArgumentException (_("Arg_InsufficientSpace"), "chars");
+ }
+ chars[posn++] = (char)byteval;
+ normal = true;
+ leftOverSize = 0;
+ leftOverBits = 0;
}
- leftOver = (leftOverBits | (leftOverSize << 16) |
- (normal ? 0 : 0x01000000) |
- (prevIsPlus ? 0x02000000 : 0));
-
- // Return the final length to the caller.
- return posn - charIndex;
+ prevIsPlus = false;
}
+ }
+ leftOver = (leftOverBits | (leftOverSize << 16) |
+ (normal ? 0 : 0x01000000) |
+ (prevIsPlus ? 0x02000000 : 0));
+
+ // Return the final length to the caller.
+ return posn - charIndex;
+ }
// Get the characters that result from decoding a byte buffer.
- public override int GetChars(byte[] bytes, int byteIndex, int byteCount,
+ public override int GetChars (byte[] bytes, int byteIndex, int byteCount,
char[] chars, int charIndex)
- {
- int leftOver = 0;
- return InternalGetChars(bytes, byteIndex, byteCount,
- chars, charIndex, ref leftOver);
- }
+ {
+ int leftOver = 0;
+ return InternalGetChars (bytes, byteIndex, byteCount, chars, charIndex, ref leftOver);
+ }
// Get the maximum number of bytes needed to encode a
// specified number of characters.
- public override int GetMaxByteCount(int charCount)
- {
- if(charCount < 0)
- {
- throw new ArgumentOutOfRangeException
- ("charCount", _("ArgRange_NonNegative"));
- }
- return charCount * 5;
- }
+ public override int GetMaxByteCount (int charCount)
+ {
+ if (charCount < 0) {
+ throw new ArgumentOutOfRangeException ("charCount", _("ArgRange_NonNegative"));
+ }
+ if (charCount == 0)
+ return 0;
+ return 8 * (int) (charCount / 3) + (charCount % 3) * 3 + 2;
+ }
// Get the maximum number of characters needed to decode a
// specified number of bytes.
- public override int GetMaxCharCount(int byteCount)
- {
- if(byteCount < 0)
- {
- throw new ArgumentOutOfRangeException
- ("byteCount", _("ArgRange_NonNegative"));
- }
- return byteCount;
- }
+ public override int GetMaxCharCount (int byteCount)
+ {
+ if (byteCount < 0) {
+ throw new ArgumentOutOfRangeException ("byteCount", _("ArgRange_NonNegative"));
+ }
+ return byteCount;
+ }
// Get a UTF7-specific decoder that is attached to this instance.
- public override Decoder GetDecoder()
- {
- return new UTF7Decoder();
- }
+ public override Decoder GetDecoder ()
+ {
+ return new UTF7Decoder ();
+ }
// Get a UTF7-specific encoder that is attached to this instance.
- public override Encoder GetEncoder()
- {
- return new UTF7Encoder(allowOptionals);
- }
-
-#if !ECMA_COMPAT
-
- // Get the mail body name for this encoding.
- public override String BodyName
- {
- get
- {
- return "utf-7";
- }
- }
-
- // Get the human-readable name for this encoding.
- public override String EncodingName
- {
- get
- {
- return "Unicode (UTF-7)";
- }
- }
-
- // Get the mail agent header name for this encoding.
- public override String HeaderName
- {
- get
- {
- return "utf-7";
- }
- }
-
- // Determine if this encoding can be displayed in a mail/news agent.
- public override bool IsMailNewsDisplay
- {
- get
- {
- return true;
- }
- }
-
- // Determine if this encoding can be saved from a mail/news agent.
- public override bool IsMailNewsSave
- {
- get
- {
- return true;
- }
- }
-
- // Get the IANA-preferred Web name for this encoding.
- public override String WebName
- {
- get
- {
- return "utf-7";
- }
- }
-
- // Get the Windows code page represented by this object.
- public override int WindowsCodePage
- {
- get
- {
- return UnicodeEncoding.UNICODE_CODE_PAGE;
- }
- }
-
-#endif // !ECMA_COMPAT
+ public override Encoder GetEncoder ()
+ {
+ return new UTF7Encoder (allowOptionals);
+ }
// UTF-7 decoder implementation.
private sealed class UTF7Decoder : Decoder
private int leftOver;
// Constructor.
- public UTF7Decoder()
- {
- leftOver = 0;
- }
+ public UTF7Decoder ()
+ {
+ leftOver = 0;
+ }
// Override inherited methods.
- public override int GetCharCount(byte[] bytes, int index, int count)
- {
- return InternalGetCharCount(bytes, index, count, leftOver);
- }
- public override int GetChars(byte[] bytes, int byteIndex,
+ public override int GetCharCount (byte[] bytes, int index, int count)
+ {
+ return InternalGetCharCount (bytes, index, count, leftOver);
+ }
+ public override int GetChars (byte[] bytes, int byteIndex,
int byteCount, char[] chars,
int charIndex)
- {
- return InternalGetChars(bytes, byteIndex, byteCount,
- chars, charIndex, ref leftOver);
- }
+ {
+ return InternalGetChars (bytes, byteIndex, byteCount, chars, charIndex, ref leftOver);
+ }
} // class UTF7Decoder
private sealed class UTF7Encoder : Encoder
{
private bool allowOptionals;
- private int leftOver;
+ private int leftOver = 0;
+ private bool isInShifted = false;
// Constructor.
- public UTF7Encoder(bool allowOptionals)
- {
- this.allowOptionals = allowOptionals;
- this.leftOver = 0;
- }
+ public UTF7Encoder (bool allowOptionals)
+ {
+ this.allowOptionals = allowOptionals;
+ }
// Override inherited methods.
- public override int GetByteCount(char[] chars, int index,
+ public override int GetByteCount (char[] chars, int index,
int count, bool flush)
- {
- return InternalGetByteCount
- (chars, index, count, flush, leftOver, allowOptionals);
- }
- public override int GetBytes(char[] chars, int charIndex,
+ {
+ return InternalGetByteCount
+ (chars, index, count, flush, leftOver, isInShifted, allowOptionals);
+ }
+ public override int GetBytes (char[] chars, int charIndex,
int charCount, byte[] bytes,
int byteIndex, bool flush)
- {
- return InternalGetBytes(chars, charIndex, charCount,
- bytes, byteIndex, flush,
- ref leftOver, allowOptionals);
- }
+ {
+ return InternalGetBytes (chars, charIndex, charCount,
+ bytes, byteIndex, flush,
+ ref leftOver, ref isInShifted, allowOptionals);
+ }
} // class UTF7Encoder
projects / mono.git / blobdiff