internal unsafe static void Memcpy(byte *pDest, int destIndex, byte[] src, int srcIndex, int len)
{
if (len == 0)
{
return;
}
fixed(byte *ptr = src)
{
Buffer.Memcpy(pDest + destIndex, ptr + srcIndex, len);
}
}
internal unsafe static void Memcpy(byte[] dest, int destIndex, byte *src, int srcIndex, int len)
{
if (len == 0)
{
return;
}
fixed(byte *ptr = dest)
{
Buffer.Memcpy(ptr + destIndex, src + srcIndex, len);
}
}
// Copies the source String (byte buffer) to the destination IntPtr memory allocated with len bytes.
internal static unsafe void InternalCopy(String src, IntPtr dest, int len)
{
if (len == 0)
return;
fixed(char *charPtr = &src._firstChar)
{
byte *srcPtr = (byte *)charPtr;
byte *dstPtr = (byte *)dest;
Buffer.Memcpy(dstPtr, srcPtr, len);
}
}
private static unsafe string Ctor(sbyte *value, int startIndex, int length, Encoding enc)
{
if (enc == null)
{
return(new string(value, startIndex, length));
}
if (length < 0)
{
throw new ArgumentOutOfRangeException(nameof(length), SR.ArgumentOutOfRange_NeedNonNegNum);
}
if (startIndex < 0)
{
throw new ArgumentOutOfRangeException(nameof(startIndex), SR.ArgumentOutOfRange_StartIndex);
}
if (value == null)
{
if (length == 0)
{
return(Empty);
}
throw new ArgumentNullException(nameof(value));
}
byte *pStart = (byte *)(value + startIndex);
if (pStart < value)
{
// overflow check
throw new ArgumentOutOfRangeException(nameof(startIndex), SR.ArgumentOutOfRange_PartialWCHAR);
}
byte[] copyOfValue = new byte[length];
fixed(byte *pCopyOfValue = copyOfValue)
{
try
{
Buffer.Memcpy(dest: pCopyOfValue, src: pStart, len: length);
}
catch (Exception)
{
throw new ArgumentOutOfRangeException(nameof(value), SR.ArgumentOutOfRange_PartialWCHAR);
}
}
return(enc.GetString(copyOfValue));
}
[System.Security.SecuritySafeCritical] // auto-generated
public void AppendString(string stringToAppend)
{
if (String.IsNullOrEmpty(stringToAppend))
{
return;
}
if ((m_totalSize - m_length) < stringToAppend.Length)
{
throw new IndexOutOfRangeException();
}
fixed(char *pointerToString = stringToAppend)
{
Buffer.Memcpy((byte *)(m_buffer + m_length), (byte *)pointerToString, stringToAppend.Length * sizeof(char));
}
m_length += stringToAppend.Length;
Contract.Assert(m_length <= m_totalSize, "Buffer has been overflowed!");
}
public unsafe void AppendString(string stringToAppend)
{
if (string.IsNullOrEmpty(stringToAppend))
{
return;
}
if (this.m_totalSize - this.m_length < stringToAppend.Length)
{
throw new IndexOutOfRangeException();
}
string str = stringToAppend;
char * chPtr = (char *)str;
if ((IntPtr)chPtr != IntPtr.Zero)
{
chPtr += RuntimeHelpers.OffsetToStringData;
}
Buffer.Memcpy((byte *)(this.m_buffer + this.m_length), (byte *)chPtr, stringToAppend.Length * 2);
str = (string)null;
this.m_length = this.m_length + stringToAppend.Length;
}
public unsafe void AppendString(string stringToAppend)
{
if (string.IsNullOrEmpty(stringToAppend))
{
return;
}
if (this.m_totalSize - this.m_length < stringToAppend.Length)
{
throw new IndexOutOfRangeException();
}
fixed(string text = stringToAppend)
{
char *ptr = text;
if (ptr != null)
{
ptr += RuntimeHelpers.OffsetToStringData / 2;
}
Buffer.Memcpy((byte *)(this.m_buffer + this.m_length), (byte *)ptr, stringToAppend.Length * 2);
}
this.m_length += stringToAppend.Length;
}
unsafe static private String CreateString(sbyte *value, int startIndex, int length, Encoding enc)
{
if (enc == null)
{
return(new String(value, startIndex, length)); // default to ANSI
}
if (length < 0)
{
throw new ArgumentOutOfRangeException(nameof(length), SR.ArgumentOutOfRange_NeedNonNegNum);
}
if (startIndex < 0)
{
throw new ArgumentOutOfRangeException(nameof(startIndex), SR.ArgumentOutOfRange_StartIndex);
}
if ((value + startIndex) < value)
{
// overflow check
throw new ArgumentOutOfRangeException(nameof(startIndex), SR.ArgumentOutOfRange_PartialWCHAR);
}
byte[] b = new byte[length];
try
{
Buffer.Memcpy(b, 0, (byte *)value, startIndex, length);
}
catch (NullReferenceException)
{
// If we got a NullReferencException. It means the pointer or
// the index is out of range
throw new ArgumentOutOfRangeException(nameof(value),
SR.ArgumentOutOfRange_PartialWCHAR);
}
return(enc.GetString(b));
}
static unsafe void memcpy(byte *dest, byte *src, int size)
{
Buffer.Memcpy(dest, src, size);
}
internal static unsafe void wstrcpy(char *dmem, char *smem, int charCount)
{
Buffer.Memcpy((byte *)dmem, (byte *)smem, charCount * 2); // 2 used everywhere instead of sizeof(char)
}
//
// IRI normalization for strings containing characters that are not allowed or
// escaped characters that should be unescaped in the context of the specified Uri component.
//
internal static unsafe string EscapeUnescapeIri(char *pInput, int start, int end, UriComponents component)
{
char[] dest = new char[end - start];
byte[] bytes = null;
// Pin the array to do pointer accesses
GCHandle destHandle = GCHandle.Alloc(dest, GCHandleType.Pinned);
char * pDest = (char *)destHandle.AddrOfPinnedObject();
const int percentEncodingLen = 3; // Escaped UTF-8 will take 3 chars: %AB.
const int bufferCapacityIncrease = 30 * percentEncodingLen;
int bufferRemaining = 0;
int next = start;
int destOffset = 0;
char ch;
bool escape = false;
bool surrogatePair = false;
for (; next < end; ++next)
{
escape = false;
surrogatePair = false;
if ((ch = pInput[next]) == '%')
{
if (next + 2 < end)
{
ch = UriHelper.EscapedAscii(pInput[next + 1], pInput[next + 2]);
// Do not unescape a reserved char
if (ch == Uri.c_DummyChar || ch == '%' || CheckIsReserved(ch, component) || UriHelper.IsNotSafeForUnescape(ch))
{
// keep as is
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next++];
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next++];
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next];
continue;
}
else if (ch <= '\x7F')
{
Debug.Assert(ch < 0xFF, "Expecting ASCII character.");
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
//ASCII
pDest[destOffset++] = ch;
next += 2;
continue;
}
else
{
// possibly utf8 encoded sequence of unicode
// check if safe to unescape according to Iri rules
Debug.Assert(ch < 0xFF, "Expecting ASCII character.");
int startSeq = next;
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 = pInput[next]) != '%' || next + 2 >= end)
{
break;
}
// already made sure we have 3 characters in str
ch = UriHelper.EscapedAscii(pInput[next + 1], pInput[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;
}
Debug.Assert(ch < 0xFF, "Expecting ASCII character.");
}
next--; // for loop will increment
// Using encoder with no replacement fall-back will skip all invalid UTF-8 sequences.
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);
if (charCount != 0)
{
// If invalid sequences were present in the original escaped string, we need to
// copy the escaped versions of those sequences.
// Decoded Unicode values will be kept only when they are allowed by the URI/IRI RFC
// rules.
UriHelper.MatchUTF8Sequence(pDest, dest, ref destOffset, unescapedChars, charCount, bytes,
byteCount, component == UriComponents.Query, true);
}
else
{
// copy escaped sequence as is
for (int i = startSeq; i <= next; ++i)
{
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[i];
}
}
}
}
else
{
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next];
}
}
else if (ch > '\x7f')
{
// unicode
char ch2;
if ((Char.IsHighSurrogate(ch)) && (next + 1 < end))
{
ch2 = pInput[next + 1];
escape = !CheckIriUnicodeRange(ch, ch2, ref surrogatePair, component == UriComponents.Query);
if (!escape)
{
// copy the two chars
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next++];
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next];
}
}
else
{
if (CheckIriUnicodeRange(ch, component == UriComponents.Query))
{
if (!Uri.IsBidiControlCharacter(ch) || !UriParser.DontKeepUnicodeBidiFormattingCharacters)
{
// copy it
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next];
}
}
else
{
// escape it
escape = true;
}
}
}
else
{
// just copy the character
Debug.Assert(dest.Length > destOffset, "Buffer overrun detected");
pDest[destOffset++] = pInput[next];
}
if (escape)
{
const int maxNumberOfBytesEncoded = 4;
if (bufferRemaining < maxNumberOfBytesEncoded * percentEncodingLen)
{
int newBufferLength = 0;
checked
{
// may need more memory since we didn't anticipate escaping
newBufferLength = dest.Length + bufferCapacityIncrease;
bufferRemaining += bufferCapacityIncrease;
}
char[] newDest = new char[newBufferLength];
fixed(char *pNewDest = newDest)
{
#if !UT_PUBLIC_DEPENDS
Buffer.Memcpy((byte *)pNewDest, (byte *)pDest, destOffset * sizeof(char));
#else
for (int idx = 0; idx < destOffset; idx++)
{
pNewDest[idx] = pDest[idx];
}
#endif
}
if (destHandle.IsAllocated)
{
destHandle.Free();
}
dest = newDest;
// re-pin new dest[] array
destHandle = GCHandle.Alloc(dest, GCHandleType.Pinned);
pDest = (char *)destHandle.AddrOfPinnedObject();
}
byte[] encodedBytes = new byte[maxNumberOfBytesEncoded];
fixed(byte *pEncodedBytes = encodedBytes)
{
int encodedBytesCount = Encoding.UTF8.GetBytes(pInput + next, surrogatePair ? 2 : 1, pEncodedBytes, maxNumberOfBytesEncoded);
Debug.Assert(encodedBytesCount <= maxNumberOfBytesEncoded, "UTF8 encoder should not exceed specified byteCount");
bufferRemaining -= encodedBytesCount * percentEncodingLen;
for (int count = 0; count < encodedBytesCount; ++count)
{
UriHelper.EscapeAsciiChar((char)encodedBytes[count], dest, ref destOffset);
}
}
}
}
if (destHandle.IsAllocated)
{
destHandle.Free();
}
Debug.Assert(destOffset <= dest.Length, "Buffer overrun detected");
return(new string(dest, 0, destOffset));
}
