private static async Task WriteDefinitelyEscapedJavaScriptStringWithoutDelimitersAsync(
TextWriter writer, string s, int lastWritePosition, bool[] charEscapeFlags,
StringEscapeHandling stringEscapeHandling, JsonTextWriter client, char[] writeBuffer,
CancellationToken cancellationToken)
{
if (writeBuffer == null || writeBuffer.Length < lastWritePosition)
{
writeBuffer = client.EnsureWriteBuffer(lastWritePosition, UnicodeTextLength);
}
if (lastWritePosition != 0)
{
s.CopyTo(0, writeBuffer, 0, lastWritePosition);
// write unchanged chars at start of text.
await writer.WriteAsync(writeBuffer, 0, lastWritePosition, cancellationToken).ConfigureAwait(false);
}
int length;
bool isEscapedUnicodeText = false;
string?escapedValue = null;
for (int i = lastWritePosition; i < s.Length; i++)
{
char c = s[i];
if (c < charEscapeFlags.Length && !charEscapeFlags[c])
{
continue;
}
switch (c)
{
case '\t':
escapedValue = @"\t";
break;
case '\n':
escapedValue = @"\n";
break;
case '\r':
escapedValue = @"\r";
break;
case '\f':
escapedValue = @"\f";
break;
case '\b':
escapedValue = @"\b";
break;
case '\\':
escapedValue = @"\\";
break;
case '\u0085': // Next Line
escapedValue = @"\u0085";
break;
case '\u2028': // Line Separator
escapedValue = @"\u2028";
break;
case '\u2029': // Paragraph Separator
escapedValue = @"\u2029";
break;
default:
if (c < charEscapeFlags.Length || stringEscapeHandling == StringEscapeHandling.EscapeNonAscii)
{
if (c == '\'' && stringEscapeHandling != StringEscapeHandling.EscapeHtml)
{
escapedValue = @"\'";
}
else if (c == '"' && stringEscapeHandling != StringEscapeHandling.EscapeHtml)
{
escapedValue = @"\""";
}
else
{
if (writeBuffer.Length < UnicodeTextLength)
{
writeBuffer = client.EnsureWriteBuffer(UnicodeTextLength, 0);
}
StringUtils.ToCharAsUnicode(c, writeBuffer);
isEscapedUnicodeText = true;
}
}
else
{
continue;
}
break;
}
if (i > lastWritePosition)
{
length = i - lastWritePosition + (isEscapedUnicodeText ? UnicodeTextLength : 0);
int start = isEscapedUnicodeText ? UnicodeTextLength : 0;
if (writeBuffer.Length < length)
{
writeBuffer = client.EnsureWriteBuffer(length, UnicodeTextLength);
}
s.CopyTo(lastWritePosition, writeBuffer, start, length - start);
// write unchanged chars before writing escaped text
await writer.WriteAsync(writeBuffer, start, length - start, cancellationToken).ConfigureAwait(false);
}
lastWritePosition = i + 1;
if (!isEscapedUnicodeText)
{
await writer.WriteAsync(escapedValue !, cancellationToken).ConfigureAwait(false);
}
else
{
await writer.WriteAsync(writeBuffer, 0, UnicodeTextLength, cancellationToken).ConfigureAwait(false);
isEscapedUnicodeText = false;
}
}
length = s.Length - lastWritePosition;
if (length != 0)
{
if (writeBuffer.Length < length)
{
writeBuffer = client.EnsureWriteBuffer(length, 0);
}
s.CopyTo(lastWritePosition, writeBuffer, 0, length);
// write remaining text
await writer.WriteAsync(writeBuffer, 0, length, cancellationToken).ConfigureAwait(false);
}
}
private static async Task WriteDefinitelyEscapedJavaScriptStringWithoutDelimitersAsync(TextWriter writer, string s, int lastWritePosition, bool[] charEscapeFlags, StringEscapeHandling stringEscapeHandling, JsonTextWriter client, char[] writeBuffer, CancellationToken cancellationToken)
{
int length;
ConfiguredTaskAwaitable configuredTaskAwaitable;
char chr;
if (writeBuffer == null || (int)writeBuffer.Length < lastWritePosition)
{
writeBuffer = client.EnsureWriteBuffer(lastWritePosition, 6);
}
if (lastWritePosition != 0)
{
s.CopyTo(0, writeBuffer, 0, lastWritePosition);
configuredTaskAwaitable = writer.WriteAsync(writeBuffer, 0, lastWritePosition, cancellationToken).ConfigureAwait(false);
await configuredTaskAwaitable;
}
bool flag = false;
string str = null;
for (int i = lastWritePosition; i < s.Length; i++)
{
chr = s[i];
if (chr >= (char)((int)charEscapeFlags.Length) || charEscapeFlags[chr])
{
if (chr <= '\\')
{
switch (chr)
{
case '\b':
{
str = "\\b";
break;
}
case '\t':
{
str = "\\t";
break;
}
case '\n':
{
str = "\\n";
break;
}
case '\v':
{
goto Label0;
}
case '\f':
{
str = "\\f";
break;
}
case '\r':
{
str = "\\r";
break;
}
default:
{
if (chr == '\\')
{
str = "\\\\";
break;
}
else
{
goto Label0;
}
}
}
}
else if (chr == '\u0085')
{
str = "\\u0085";
}
else if (chr == '\u2028')
{
str = "\\u2028";
}
else
{
if (chr != '\u2029')
{
goto Label0;
}
str = "\\u2029";
}
Label2:
if (i > lastWritePosition)
{
int num = i - lastWritePosition;
length = num + (flag ? 6 : 0);
int num1 = (flag ? 6 : 0);
if ((int)writeBuffer.Length < length)
{
writeBuffer = client.EnsureWriteBuffer(length, 6);
}
s.CopyTo(lastWritePosition, writeBuffer, num1, length - num1);
configuredTaskAwaitable = writer.WriteAsync(writeBuffer, num1, length - num1, cancellationToken).ConfigureAwait(false);
await configuredTaskAwaitable;
}
lastWritePosition = i + 1;
if (flag)
{
configuredTaskAwaitable = writer.WriteAsync(writeBuffer, 0, 6, cancellationToken).ConfigureAwait(false);
await configuredTaskAwaitable;
flag = false;
}
else
{
configuredTaskAwaitable = writer.WriteAsync(str, cancellationToken).ConfigureAwait(false);
await configuredTaskAwaitable;
}
}
Label1:
}
length = s.Length - lastWritePosition;
if (length != 0)
{
if ((int)writeBuffer.Length < length)
{
writeBuffer = client.EnsureWriteBuffer(length, 0);
}
s.CopyTo(lastWritePosition, writeBuffer, 0, length);
configuredTaskAwaitable = writer.WriteAsync(writeBuffer, 0, length, cancellationToken).ConfigureAwait(false);
await configuredTaskAwaitable;
}
return;
Label0:
if (chr >= (char)((int)charEscapeFlags.Length) && stringEscapeHandling != StringEscapeHandling.EscapeNonAscii)
{
goto Label1;
}
if (chr == '\'' && stringEscapeHandling != StringEscapeHandling.EscapeHtml)
{
str = "\\'";
goto Label2;
}
else if (chr != '\"' || stringEscapeHandling == StringEscapeHandling.EscapeHtml)
{
if ((int)writeBuffer.Length < 6)
{
writeBuffer = client.EnsureWriteBuffer(6, 0);
}
StringUtils.ToCharAsUnicode(chr, writeBuffer);
flag = true;
goto Label2;
}
else
{
str = "\\\"";
goto Label2;
}
}
