private void ReadStringIntoBuffer() {
int charPos = _charPos;
int initialPosition = _charPos;
int lastWritePosition = _charPos;
StringBuffer buffer = null;
while (true) {
var charAt = _chars[charPos++];
if ('\0' == charAt) {
if (_charsUsed == charPos - 1) {
charPos--;
if (ReadData(true) == 0) {
_charPos = charPos;
throw EdiReaderException.Create(this, "Unterminated string. Expected delimiter.");
}
}
}
// Make use of the release character. Identify escape sequence
else if (Grammar.ReleaseCharacter == charAt) {
_charPos = charPos;
if (!EnsureChars(0, true)) {
_charPos = charPos;
throw EdiReaderException.Create(this, "Unterminated string. Expected delimiter.");
}
// start of escape sequence
int escapeStartPos = charPos - 1;
char currentChar = _chars[charPos];
char writeChar;
if (Grammar.IsSpecial(currentChar) || Grammar.ReleaseCharacter == currentChar) {
charPos++;
writeChar = currentChar;
} else {
charPos++;
_charPos = charPos;
throw EdiReaderException.Create(this, "Bad EDI escape sequence: {0}.".FormatWith(CultureInfo.InvariantCulture, Grammar.ReleaseCharacter + currentChar));
}
if (buffer == null)
buffer = GetBuffer();
WriteCharToBuffer(buffer, writeChar, lastWritePosition, escapeStartPos);
lastWritePosition = charPos;
} else if (StringUtils.CarriageReturn == charAt) {
_charPos = charPos - 1;
ProcessCarriageReturn(true);
charPos = _charPos;
} else if (StringUtils.LineFeed == charAt) {
_charPos = charPos - 1;
ProcessLineFeed();
charPos = _charPos;
} else if (Grammar.IsSpecial(_chars[charPos - 1])) {
charPos--;
if (initialPosition == lastWritePosition) {
_stringReference = new StringReference(_chars, initialPosition, charPos - initialPosition);
} else {
if (buffer == null)
buffer = GetBuffer();
if (charPos > lastWritePosition)
buffer.Append(_chars, lastWritePosition, charPos - lastWritePosition);
_stringReference = new StringReference(buffer.GetInternalBuffer(), 0, buffer.Position);
}
_charPos = charPos;
return;
}
}
}
private void ClearRecentString() {
if (_buffer != null)
_buffer.Position = 0;
_stringReference = new StringReference();
}