public static string UnescapeDataString(string stringToUnescape)
{
if ((object)stringToUnescape == null)
{
throw new ArgumentNullException(nameof(stringToUnescape));
}
if (stringToUnescape.Length == 0)
{
return(string.Empty);
}
unsafe
{
fixed(char *pStr = stringToUnescape)
{
int position;
for (position = 0; position < stringToUnescape.Length; ++position)
{
if (pStr[position] == '%')
{
break;
}
}
if (position == stringToUnescape.Length)
{
return(stringToUnescape);
}
UnescapeMode unescapeMode = UnescapeMode.Unescape | UnescapeMode.UnescapeAll;
position = 0;
ValueStringBuilder vsb = new ValueStringBuilder(stringToUnescape.Length);
UriHelper.UnescapeString(stringToUnescape, 0, stringToUnescape.Length, ref vsb, ref position,
c_DummyChar, c_DummyChar, c_DummyChar, unescapeMode, null, false);
ReadOnlySpan <char> resultSpan = vsb.AsSpan(0, position);
string result = resultSpan.SequenceEqual(stringToUnescape) ? stringToUnescape : resultSpan.ToString();
vsb.Dispose();
return(result);
}
}
}
public static string UnescapeDataString(string stringToUnescape)
{
if ((object)stringToUnescape == null)
{
throw new ArgumentNullException("stringToUnescape");
}
if (stringToUnescape.Length == 0)
{
return(string.Empty);
}
unsafe
{
fixed(char *pStr = stringToUnescape)
{
int position;
for (position = 0; position < stringToUnescape.Length; ++position)
{
if (pStr[position] == '%')
{
break;
}
}
if (position == stringToUnescape.Length)
{
return(stringToUnescape);
}
UnescapeMode unescapeMode = UnescapeMode.Unescape | UnescapeMode.UnescapeAll;
position = 0;
char[] dest = new char[stringToUnescape.Length];
dest = UriHelper.UnescapeString(stringToUnescape, 0, stringToUnescape.Length, dest, ref position,
c_DummyChar, c_DummyChar, c_DummyChar, unescapeMode, null, false);
return(new string(dest, 0, position));
}
}
}
internal unsafe static char[] UnescapeString(char* pStr, int start, int end, char[] dest, ref int destPosition,
char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax, bool isQuery)
{
byte [] bytes = null;
byte escapedReallocations = 0;
bool escapeReserved = false;
int next = start;
bool iriParsing = Uri.IriParsingStatic(syntax)
&& ((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.EscapeUnescape);
while (true)
{
// we may need to re-pin dest[]
fixed (char* pDest = dest)
{
if ((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.CopyOnly)
{
while (start < end)
pDest[destPosition++] = pStr[start++];
return dest;
}
while (true)
{
char ch = (char)0;
for (;next < end; ++next)
{
if ((ch = pStr[next]) == '%')
{
if ((unescapeMode & UnescapeMode.Unescape) == 0)
{
// re-escape, don't check anything else
escapeReserved = true;
}
else if (next+2 < end)
{
ch = EscapedAscii(pStr[next+1], pStr[next+2]);
// Unescape a good sequence if full unescape is requested
if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (ch == Uri.c_DummyChar)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
// Should be a rare case where the app tries to feed an invalid escaped sequence
throw new UriFormatException(SR.GetString(SR.net_uri_BadString));
}
continue;
}
}
// re-escape % from an invalid sequence
else if (ch == Uri.c_DummyChar)
{
if ((unescapeMode & UnescapeMode.Escape) != 0)
escapeReserved = true;
else
continue; // we should throw instead but since v1.0 woudl just print '%'
}
// Do not unescape '%' itself unless full unescape is requested
else if (ch == '%')
{
next += 2;
continue;
}
// Do not unescape a reserved char unless full unescape is requested
else if (ch == rsvd1 || ch == rsvd2 || ch == rsvd3)
{
next += 2;
continue;
}
// Do not unescape a dangerous char unless it's V1ToStringFlags mode
else if ((unescapeMode & UnescapeMode.V1ToStringFlag) == 0 && IsNotSafeForUnescape(ch))
{
next += 2;
continue;
}
else if (iriParsing && ((ch <='\x9F' && IsNotSafeForUnescape(ch)) ||
(ch >'\x9F' &&!Uri.CheckIriUnicodeRange(ch, isQuery))))
{
// check if unenscaping gives a char ouside iri range
// if it does then keep it escaped
next += 2;
continue;
}
// unescape escaped char or escape %
break;
}
else if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
// Should be a rare case where the app tries to feed an invalid escaped sequence
throw new UriFormatException(SR.GetString(SR.net_uri_BadString));
}
// keep a '%' as part of a bogus sequence
continue;
}
else
{
escapeReserved = true;
}
// escape (escapeReserved==ture) or otheriwse unescape the sequence
break;
}
else if ((unescapeMode & (UnescapeMode.Unescape | UnescapeMode.UnescapeAll))
== (UnescapeMode.Unescape | UnescapeMode.UnescapeAll))
{
continue;
}
else if ((unescapeMode & UnescapeMode.Escape) != 0)
{
// Could actually escape some of the characters
if (ch == rsvd1 || ch == rsvd2 || ch == rsvd3)
{
// found an unescaped reserved character -> escape it
escapeReserved = true;
break;
}
else if ((unescapeMode & UnescapeMode.V1ToStringFlag) == 0
&& (ch <= '\x1F' || (ch >= '\x7F' && ch <= '\x9F')))
{
// found an unescaped reserved character -> escape it
escapeReserved = true;
break;
}
}
}
//copy off previous characters from input
while (start < next)
pDest[destPosition++] = pStr[start++];
if (next != end)
{
//VsWhidbey#87423
if (escapeReserved)
{
//escape that char
// Since this should be _really_ rare case, reallocate with constant size increase of 30 rsvd-type characters.
if (escapedReallocations == 0)
{
escapedReallocations = 30;
char[] newDest = new char[dest.Length + escapedReallocations*3];
fixed (char *pNewDest = newDest)
{
for (int i = 0; i < destPosition; ++i)
pNewDest[i] = pDest[i];
}
dest = newDest;
// re-pin new dest[] array
goto dest_fixed_loop_break;
}
else
{
--escapedReallocations;
EscapeAsciiChar(pStr[next], dest, ref destPosition);
escapeReserved = false;
start = ++next;
continue;
}
}
// unescaping either one Ascii or possibly multiple Unicode
if (ch <= '\x7F')
{
//ASCII
dest[destPosition++] = ch;
next+=3;
start = next;
continue;
}
// Unicode
int byteCount = 1;
// lazy initialization of max size, will reuse the array for next sequences
if ((object) bytes == null)
bytes = new byte[end - next];
bytes[0] = (byte)ch;
next+=3;
while (next < end)
{
// Check on exit criterion
if ((ch = pStr[next]) != '%' || next+2 >= end)
break;
// already made sure we have 3 characters in str
ch = EscapedAscii(pStr[next+1], pStr[next+2]);
//invalid hex sequence ?
if (ch == Uri.c_DummyChar)
break;
// character is not part of a UTF-8 sequence ?
else if (ch < '\x80')
break;
else
{
//a UTF-8 sequence
bytes[byteCount++] = (byte)ch;
next += 3;
}
}
Encoding noFallbackCharUTF8 = (Encoding)Encoding.UTF8.Clone();
noFallbackCharUTF8.EncoderFallback = new EncoderReplacementFallback("");
noFallbackCharUTF8.DecoderFallback = new DecoderReplacementFallback("");
char[] unescapedChars = new char[bytes.Length];
int charCount = noFallbackCharUTF8.GetChars(bytes, 0, byteCount, unescapedChars, 0);
start = next;
// match exact bytes
// Do not unescape chars not allowed by Iri
// need to check for invalid utf sequences that may not have given any chars
MatchUTF8Sequence(pDest, dest, ref destPosition, unescapedChars, charCount, bytes,
byteCount, isQuery, iriParsing);
}
if (next == end)
goto done;
}
dest_fixed_loop_break: ;
}
}
done: return dest;
}
//
// This method will assume that any good Escaped Sequence will be unescaped in the output
// - Assumes Dest.Length - detPosition >= end-start
// - UnescapeLevel controls various modes of opearion
// - Any "bad" escape sequence will remain as is or '%' will be escaped.
// - destPosition tells the starting index in dest for placing the result.
// On return destPosition tells the last character + 1 postion in the "dest" array.
// - The control chars and chars passed in rsdvX parameters may be re-escaped depending on UnescapeLevel
// - It is a RARE case when Unescape actually needs escaping some characteres mentioned above.
// For this reason it returns a char[] that is usually the same ref as the input "dest" value.
//
internal unsafe static char[] UnescapeString(string input, int start, int end, char[] dest,
ref int destPosition, char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax,
bool isQuery)
{
fixed (char *pStr = input)
{
return UnescapeString(pStr, start, end, dest, ref destPosition, rsvd1, rsvd2, rsvd3, unescapeMode,
syntax, isQuery);
}
}
internal unsafe static char[] UnescapeString(char *pStr, int start, int end, char[] dest, ref int destPosition,
char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax, bool isQuery)
{
byte [] bytes = null;
byte escapedReallocations = 0;
bool escapeReserved = false;
int next = start;
bool iriParsing = Uri.IriParsingStatic(syntax) &&
((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.EscapeUnescape);
while (true)
{
// we may need to re-pin dest[]
fixed(char *pDest = dest)
{
if ((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.CopyOnly)
{
while (start < end)
{
pDest[destPosition++] = pStr[start++];
}
return(dest);
}
while (true)
{
char ch = (char)0;
for (; next < end; ++next)
{
if ((ch = pStr[next]) == '%')
{
if ((unescapeMode & UnescapeMode.Unescape) == 0)
{
// re-escape, don't check anything else
escapeReserved = true;
}
else if (next + 2 < end)
{
ch = EscapedAscii(pStr[next + 1], pStr[next + 2]);
// Unescape a good sequence if full unescape is requested
if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (ch == Uri.c_DummyChar)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
// Should be a rare case where the app tries to feed an invalid escaped sequence
throw new UriFormatException(SR.GetString(SR.net_uri_BadString));
}
continue;
}
}
// re-escape % from an invalid sequence
else if (ch == Uri.c_DummyChar)
{
if ((unescapeMode & UnescapeMode.Escape) != 0)
{
escapeReserved = true;
}
else
{
continue; // we should throw instead but since v1.0 woudl just print '%'
}
}
// Do not unescape '%' itself unless full unescape is requested
else if (ch == '%')
{
next += 2;
continue;
}
// Do not unescape a reserved char unless full unescape is requested
else if (ch == rsvd1 || ch == rsvd2 || ch == rsvd3)
{
next += 2;
continue;
}
// Do not unescape a dangerous char unless it's V1ToStringFlags mode
else if ((unescapeMode & UnescapeMode.V1ToStringFlag) == 0 && IsNotSafeForUnescape(ch))
{
next += 2;
continue;
}
else if (iriParsing && ((ch <= '\x9F' && IsNotSafeForUnescape(ch)) ||
(ch > '\x9F' && !IriHelper.CheckIriUnicodeRange(ch, isQuery))))
{
// check if unenscaping gives a char ouside iri range
// if it does then keep it escaped
next += 2;
continue;
}
// unescape escaped char or escape %
break;
}
else if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
// Should be a rare case where the app tries to feed an invalid escaped sequence
throw new UriFormatException(SR.GetString(SR.net_uri_BadString));
}
// keep a '%' as part of a bogus sequence
continue;
}
else
{
escapeReserved = true;
}
// escape (escapeReserved==ture) or otheriwse unescape the sequence
break;
}
else if ((unescapeMode & (UnescapeMode.Unescape | UnescapeMode.UnescapeAll))
== (UnescapeMode.Unescape | UnescapeMode.UnescapeAll))
{
continue;
}
else if ((unescapeMode & UnescapeMode.Escape) != 0)
{
// Could actually escape some of the characters
if (ch == rsvd1 || ch == rsvd2 || ch == rsvd3)
{
// found an unescaped reserved character -> escape it
escapeReserved = true;
break;
}
else if ((unescapeMode & UnescapeMode.V1ToStringFlag) == 0 &&
(ch <= '\x1F' || (ch >= '\x7F' && ch <= '\x9F')))
{
// found an unescaped reserved character -> escape it
escapeReserved = true;
break;
}
}
}
//copy off previous characters from input
while (start < next)
{
pDest[destPosition++] = pStr[start++];
}
if (next != end)
{
//VsWhidbey#87423
if (escapeReserved)
{
//escape that char
// Since this should be _really_ rare case, reallocate with constant size increase of 30 rsvd-type characters.
if (escapedReallocations == 0)
{
escapedReallocations = 30;
char[] newDest = new char[dest.Length + escapedReallocations * 3];
fixed(char *pNewDest = newDest)
{
for (int i = 0; i < destPosition; ++i)
{
pNewDest[i] = pDest[i];
}
}
dest = newDest;
// re-pin new dest[] array
goto dest_fixed_loop_break;
}
else
{
--escapedReallocations;
EscapeAsciiChar(pStr[next], dest, ref destPosition);
escapeReserved = false;
start = ++next;
continue;
}
}
// unescaping either one Ascii or possibly multiple Unicode
if (ch <= '\x7F')
{
//ASCII
dest[destPosition++] = ch;
next += 3;
start = next;
continue;
}
// Unicode
int byteCount = 1;
// lazy initialization of max size, will reuse the array for next sequences
if ((object)bytes == null)
{
bytes = new byte[end - next];
}
bytes[0] = (byte)ch;
next += 3;
while (next < end)
{
// Check on exit criterion
if ((ch = pStr[next]) != '%' || next + 2 >= end)
{
break;
}
// already made sure we have 3 characters in str
ch = EscapedAscii(pStr[next + 1], pStr[next + 2]);
//invalid hex sequence ?
if (ch == Uri.c_DummyChar)
{
break;
}
// character is not part of a UTF-8 sequence ?
else if (ch < '\x80')
{
break;
}
else
{
//a UTF-8 sequence
bytes[byteCount++] = (byte)ch;
next += 3;
}
}
Encoding noFallbackCharUTF8 = (Encoding)Encoding.UTF8.Clone();
noFallbackCharUTF8.EncoderFallback = new EncoderReplacementFallback("");
noFallbackCharUTF8.DecoderFallback = new DecoderReplacementFallback("");
char[] unescapedChars = new char[bytes.Length];
int charCount = noFallbackCharUTF8.GetChars(bytes, 0, byteCount, unescapedChars, 0);
start = next;
// match exact bytes
// Do not unescape chars not allowed by Iri
// need to check for invalid utf sequences that may not have given any chars
MatchUTF8Sequence(pDest, dest, ref destPosition, unescapedChars, charCount, bytes,
byteCount, isQuery, iriParsing);
}
if (next == end)
{
goto done;
}
}
dest_fixed_loop_break :;
}
}
done : return(dest);
}
//
// This method will assume that any good Escaped Sequence will be unescaped in the output
// - Assumes Dest.Length - detPosition >= end-start
// - UnescapeLevel controls various modes of opearion
// - Any "bad" escape sequence will remain as is or '%' will be escaped.
// - destPosition tells the starting index in dest for placing the result.
// On return destPosition tells the last character + 1 postion in the "dest" array.
// - The control chars and chars passed in rsdvX parameters may be re-escaped depending on UnescapeLevel
// - It is a RARE case when Unescape actually needs escaping some characteres mentioned above.
// For this reason it returns a char[] that is usually the same ref as the input "dest" value.
//
internal unsafe static char[] UnescapeString(string input, int start, int end, char[] dest,
ref int destPosition, char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax,
bool isQuery)
{
fixed(char *pStr = input)
{
return(UnescapeString(pStr, start, end, dest, ref destPosition, rsvd1, rsvd2, rsvd3, unescapeMode,
syntax, isQuery));
}
}
private static unsafe char[] UnescapeString(char* pStr, int start, int end, char[] dest, ref int destPosition, char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax, bool isQuery, bool readOnlyConfig)
{
byte[] bytes = null;
byte num = 0;
bool flag = false;
int index = start;
bool iriParsing = (s_IriParsing && (readOnlyConfig || (!readOnlyConfig && IriParsingStatic(syntax)))) && ((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.EscapeUnescape);
Label_002E:;
try
{
fixed (char* chRef = dest)
{
char ch;
if ((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.CopyOnly)
{
while (start < end)
{
chRef[destPosition++] = pStr[start++];
}
return dest;
}
Label_007F:
ch = '\0';
while (index < end)
{
ch = pStr[index];
if (ch == '%')
{
if ((unescapeMode & UnescapeMode.Unescape) == UnescapeMode.CopyOnly)
{
flag = true;
}
else
{
if ((index + 2) < end)
{
ch = EscapedAscii(pStr[index + 1], pStr[index + 2]);
if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (ch == 0xffff)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
throw new UriFormatException(System.SR.GetString("net_uri_BadString"));
}
goto Label_01E8;
}
break;
}
if (ch == 0xffff)
{
if ((unescapeMode & UnescapeMode.Escape) == UnescapeMode.CopyOnly)
{
goto Label_01E8;
}
flag = true;
break;
}
if (ch == '%')
{
index += 2;
}
else if (((ch == rsvd1) || (ch == rsvd2)) || (ch == rsvd3))
{
index += 2;
}
else if (((unescapeMode & UnescapeMode.V1ToStringFlag) == UnescapeMode.CopyOnly) && IsNotSafeForUnescape(ch))
{
index += 2;
}
else
{
if (!iriParsing || (((ch > '\x009f') || !IsNotSafeForUnescape(ch)) && ((ch <= '\x009f') || CheckIriUnicodeRange(ch, isQuery))))
{
break;
}
index += 2;
}
goto Label_01E8;
}
if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
throw new UriFormatException(System.SR.GetString("net_uri_BadString"));
}
goto Label_01E8;
}
flag = true;
}
break;
}
if (((unescapeMode & (UnescapeMode.UnescapeAll | UnescapeMode.Unescape)) != (UnescapeMode.UnescapeAll | UnescapeMode.Unescape)) && ((unescapeMode & UnescapeMode.Escape) != UnescapeMode.CopyOnly))
{
if (((ch == rsvd1) || (ch == rsvd2)) || (ch == rsvd3))
{
flag = true;
break;
}
if (((unescapeMode & UnescapeMode.V1ToStringFlag) == UnescapeMode.CopyOnly) && ((ch <= '\x001f') || ((ch >= '\x007f') && (ch <= '\x009f'))))
{
flag = true;
break;
}
}
Label_01E8:
index++;
}
while (start < index)
{
chRef[destPosition++] = pStr[start++];
}
if (index != end)
{
if (flag)
{
if (num == 0)
{
num = 30;
char[] chArray = new char[dest.Length + (num * 3)];
fixed (char* chRef2 = chArray)
{
for (int i = 0; i < destPosition; i++)
{
chRef2[i] = chRef[i];
}
}
dest = chArray;
goto Label_002E;
}
num = (byte) (num - 1);
EscapeAsciiChar(pStr[index], dest, ref destPosition);
flag = false;
start = ++index;
goto Label_007F;
}
if (ch <= '\x007f')
{
dest[destPosition++] = ch;
index += 3;
start = index;
goto Label_007F;
}
int byteCount = 1;
if (bytes == null)
{
bytes = new byte[end - index];
}
bytes[0] = (byte) ch;
index += 3;
while (index < end)
{
if (((ch = pStr[index]) != '%') || ((index + 2) >= end))
{
break;
}
ch = EscapedAscii(pStr[index + 1], pStr[index + 2]);
if ((ch == 0xffff) || (ch < '\x0080'))
{
break;
}
bytes[byteCount++] = (byte) ch;
index += 3;
}
Encoding encoding = Encoding.GetEncoding("utf-8", new EncoderReplacementFallback(""), new DecoderReplacementFallback(""));
char[] chars = new char[bytes.Length];
int charCount = encoding.GetChars(bytes, 0, byteCount, chars, 0);
if (charCount != 0)
{
start = index;
MatchUTF8Sequence(chRef, dest, ref destPosition, chars, charCount, bytes, isQuery, iriParsing);
}
else
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
throw new UriFormatException(System.SR.GetString("net_uri_BadString"));
}
index = start + 3;
start = index;
dest[destPosition++] = (char) bytes[0];
}
}
if (index != end)
{
goto Label_007F;
}
return dest;
}
}
finally
{
chRef = null;
}
return dest;
}
private static unsafe char[] UnescapeString(string input, int start, int end, char[] dest, ref int destPosition, char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax, bool isQuery, bool readOnlyConfig)
{
fixed (char* str = ((char*) input))
{
char* pStr = str;
return UnescapeString(pStr, start, end, dest, ref destPosition, rsvd1, rsvd2, rsvd3, unescapeMode, syntax, isQuery, readOnlyConfig);
}
}
internal static unsafe void UnescapeString(char *pStr, int start, int end, ref ValueStringBuilder dest,
char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser?syntax, bool isQuery)
{
if ((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.CopyOnly)
{
dest.Append(pStr + start, end - start);
return;
}
bool escapeReserved = false;
bool iriParsing = Uri.IriParsingStatic(syntax) &&
((unescapeMode & UnescapeMode.EscapeUnescape) == UnescapeMode.EscapeUnescape);
for (int next = start; next < end;)
{
char ch = (char)0;
for (; next < end; ++next)
{
if ((ch = pStr[next]) == '%')
{
if ((unescapeMode & UnescapeMode.Unescape) == 0)
{
// re-escape, don't check anything else
escapeReserved = true;
}
else if (next + 2 < end)
{
ch = DecodeHexChars(pStr[next + 1], pStr[next + 2]);
// Unescape a good sequence if full unescape is requested
if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (ch == Uri.c_DummyChar)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
// Should be a rare case where the app tries to feed an invalid escaped sequence
throw new UriFormatException(SR.net_uri_BadString);
}
continue;
}
}
// re-escape % from an invalid sequence
else if (ch == Uri.c_DummyChar)
{
if ((unescapeMode & UnescapeMode.Escape) != 0)
{
escapeReserved = true;
}
else
{
continue; // we should throw instead but since v1.0 would just print '%'
}
}
// Do not unescape '%' itself unless full unescape is requested
else if (ch == '%')
{
next += 2;
continue;
}
// Do not unescape a reserved char unless full unescape is requested
else if (ch == rsvd1 || ch == rsvd2 || ch == rsvd3)
{
next += 2;
continue;
}
// Do not unescape a dangerous char unless it's V1ToStringFlags mode
else if ((unescapeMode & UnescapeMode.V1ToStringFlag) == 0 && IsNotSafeForUnescape(ch))
{
next += 2;
continue;
}
else if (iriParsing && ((ch <= '\x9F' && IsNotSafeForUnescape(ch)) ||
(ch > '\x9F' && !IriHelper.CheckIriUnicodeRange(ch, isQuery))))
{
// check if unenscaping gives a char outside iri range
// if it does then keep it escaped
next += 2;
continue;
}
// unescape escaped char or escape %
break;
}
else if (unescapeMode >= UnescapeMode.UnescapeAll)
{
if (unescapeMode >= UnescapeMode.UnescapeAllOrThrow)
{
// Should be a rare case where the app tries to feed an invalid escaped sequence
throw new UriFormatException(SR.net_uri_BadString);
}
// keep a '%' as part of a bogus sequence
continue;
}
else
{
escapeReserved = true;
}
// escape (escapeReserved==true) or otherwise unescape the sequence
break;
}
else if ((unescapeMode & (UnescapeMode.Unescape | UnescapeMode.UnescapeAll))
== (UnescapeMode.Unescape | UnescapeMode.UnescapeAll))
{
continue;
}
else if ((unescapeMode & UnescapeMode.Escape) != 0)
{
// Could actually escape some of the characters
if (ch == rsvd1 || ch == rsvd2 || ch == rsvd3)
{
// found an unescaped reserved character -> escape it
escapeReserved = true;
break;
}
else if ((unescapeMode & UnescapeMode.V1ToStringFlag) == 0 &&
(ch <= '\x1F' || (ch >= '\x7F' && ch <= '\x9F')))
{
// found an unescaped reserved character -> escape it
escapeReserved = true;
break;
}
}
}
//copy off previous characters from input
while (start < next)
{
dest.Append(pStr[start++]);
}
if (next != end)
{
if (escapeReserved)
{
EscapeAsciiChar((byte)pStr[next], ref dest);
escapeReserved = false;
next++;
}
else if (ch <= 127)
{
dest.Append(ch);
next += 3;
}
else
{
// Unicode
int charactersRead = PercentEncodingHelper.UnescapePercentEncodedUTF8Sequence(
pStr + next,
end - next,
ref dest,
isQuery,
iriParsing);
Debug.Assert(charactersRead > 0);
next += charactersRead;
}
start = next;
}
}
}
internal static unsafe void UnescapeString(ReadOnlySpan <char> input, ref ValueStringBuilder dest,
char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser?syntax, bool isQuery)
{
fixed(char *pStr = &MemoryMarshal.GetReference(input))
{
UnescapeString(pStr, 0, input.Length, ref dest, rsvd1, rsvd2, rsvd3, unescapeMode, syntax, isQuery);
}
}
//
// This method will assume that any good Escaped Sequence will be unescaped in the output
// - Assumes Dest.Length - detPosition >= end-start
// - UnescapeLevel controls various modes of operation
// - Any "bad" escape sequence will remain as is or '%' will be escaped.
// - destPosition tells the starting index in dest for placing the result.
// On return destPosition tells the last character + 1 position in the "dest" array.
// - The control chars and chars passed in rsdvX parameters may be re-escaped depending on UnescapeLevel
// - It is a RARE case when Unescape actually needs escaping some characters mentioned above.
// For this reason it returns a char[] that is usually the same ref as the input "dest" value.
//
internal static unsafe void UnescapeString(string input, int start, int end, ref ValueStringBuilder dest,
char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser?syntax, bool isQuery)
{
fixed(char *pStr = input)
{
UnescapeString(pStr, start, end, ref dest, rsvd1, rsvd2, rsvd3, unescapeMode, syntax, isQuery);
}
}
internal static unsafe char[] UnescapeString(char *pStr, int start, int end, char[] dest, ref int destPosition,
char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser?syntax, bool isQuery)
{
ValueStringBuilder vsb = new ValueStringBuilder(dest.Length);
vsb.Append(dest.AsSpan(0, destPosition));
UnescapeString(pStr, start, end, ref vsb, rsvd1, rsvd2, rsvd3, unescapeMode,
syntax, isQuery);
if (vsb.Length > dest.Length)
{
dest = vsb.AsSpan().ToArray();
}
else
{
vsb.AsSpan(destPosition).TryCopyTo(dest.AsSpan(destPosition));
}
destPosition = vsb.Length;
vsb.Dispose();
return(dest);
}
internal static char[] UnescapeString(string input, int start, int end, char[] dest, ref int destPosition, char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax, bool isQuery) => default; // 0x00000001809CB150-0x00000001809CB230
internal static unsafe char[] UnescapeString(char *pStr, int start, int end, char[] dest, ref int destPosition, char rsvd1, char rsvd2, char rsvd3, UnescapeMode unescapeMode, UriParser syntax, bool isQuery) => default; // 0x00000001809CB230-0x00000001809CBC20
