private unsafe void WriteUriAttributeText(char *pSrc, char *pSrcEnd) { if (_endsWithAmpersand) { if (pSrcEnd - pSrc > 0 && pSrc[0] != '{') { OutputRestAmps(); } _endsWithAmpersand = false; } fixed(byte *pDstBegin = bufBytes) { byte *pDst = pDstBegin + this.bufPos; char ch = (char)0; for (; ;) { byte *pDstEnd = pDst + (pSrcEnd - pSrc); if (pDstEnd > pDstBegin + bufLen) { pDstEnd = pDstBegin + bufLen; } while (pDst < pDstEnd && (((xmlCharType.charProperties[(ch = *pSrc)] & XmlCharType.fAttrValue) != 0) && ch < 0x80)) { *pDst++ = (byte)ch; pSrc++; } Debug.Assert(pSrc <= pSrcEnd); // end of value if (pSrc >= pSrcEnd) { break; } // end of buffer if (pDst >= pDstEnd) { bufPos = (int)(pDst - pDstBegin); FlushBuffer(); pDst = pDstBegin + 1; continue; } // some character needs to be escaped switch (ch) { case '&': if (pSrc + 1 == pSrcEnd) { _endsWithAmpersand = true; } else if (pSrc[1] != '{') { pDst = XmlUtf8RawTextWriter.AmpEntity(pDst); break; } *pDst++ = (byte)ch; break; case '"': pDst = QuoteEntity(pDst); break; case '<': case '>': case '\'': case (char)0x9: *pDst++ = (byte)ch; break; case (char)0xD: // do not normalize new lines in attributes - just escape them pDst = CarriageReturnEntity(pDst); break; case (char)0xA: // do not normalize new lines in attributes - just escape them pDst = LineFeedEntity(pDst); break; default: const string hexDigits = "0123456789ABCDEF"; fixed(byte *pUriEscapingBuffer = _uriEscapingBuffer) { byte *pByte = pUriEscapingBuffer; byte *pEnd = pByte; XmlUtf8RawTextWriter.CharToUTF8(ref pSrc, pSrcEnd, ref pEnd); while (pByte < pEnd) { *pDst++ = (byte)'%'; *pDst++ = (byte)hexDigits[*pByte >> 4]; *pDst++ = (byte)hexDigits[*pByte & 0xF]; pByte++; } } continue; } pSrc++; } bufPos = (int)(pDst - pDstBegin); } }
// // &{ split cases // 1). HtmlAttributeText("a&"); // HtmlAttributeText("{b}"); // // 2). HtmlAttributeText("a&"); // EndAttribute(); // 3).split with Flush by the user // HtmlAttributeText("a&"); // FlushBuffer(); // HtmlAttributeText("{b}"); // // Solutions: // case 1)hold the & output as & // if the next income character is {, output { // else output amp; // private unsafe void WriteHtmlAttributeText(char *pSrc, char *pSrcEnd) { if (_endsWithAmpersand) { if (pSrcEnd - pSrc > 0 && pSrc[0] != '{') { OutputRestAmps(); } _endsWithAmpersand = false; } fixed(byte *pDstBegin = bufBytes) { byte *pDst = pDstBegin + this.bufPos; char ch = (char)0; for (; ;) { byte *pDstEnd = pDst + (pSrcEnd - pSrc); if (pDstEnd > pDstBegin + bufLen) { pDstEnd = pDstBegin + bufLen; } while (pDst < pDstEnd && (((xmlCharType.charProperties[(ch = *pSrc)] & XmlCharType.fAttrValue) != 0) && ch <= 0x7F)) { *pDst++ = (byte)ch; pSrc++; } Debug.Assert(pSrc <= pSrcEnd); // end of value if (pSrc >= pSrcEnd) { break; } // end of buffer if (pDst >= pDstEnd) { bufPos = (int)(pDst - pDstBegin); FlushBuffer(); pDst = pDstBegin + 1; continue; } // some character needs to be escaped switch (ch) { case '&': if (pSrc + 1 == pSrcEnd) { _endsWithAmpersand = true; } else if (pSrc[1] != '{') { pDst = XmlUtf8RawTextWriter.AmpEntity(pDst); break; } *pDst++ = (byte)ch; break; case '"': pDst = QuoteEntity(pDst); break; case '<': case '>': case '\'': case (char)0x9: *pDst++ = (byte)ch; break; case (char)0xD: // do not normalize new lines in attributes - just escape them pDst = CarriageReturnEntity(pDst); break; case (char)0xA: // do not normalize new lines in attributes - just escape them pDst = LineFeedEntity(pDst); break; default: EncodeChar(ref pSrc, pSrcEnd, ref pDst); continue; } pSrc++; } bufPos = (int)(pDst - pDstBegin); } }