C++ XMP_VarString::append方法代码示例

static void
AppendNodeValue ( XMP_VarString & outputStr, const XMP_VarString & value, bool forAttribute )
{

	unsigned char * runStart = (unsigned char *) value.c_str();
	unsigned char * runLimit  = runStart + value.size();
	unsigned char * runEnd;
	unsigned char   ch;
	
	while ( runStart < runLimit ) {
	
		for ( runEnd = runStart; runEnd < runLimit; ++runEnd ) {
			ch = *runEnd;
			if ( forAttribute && (ch == '"') ) break;
			if ( (ch < 0x20) || (ch == '&') || (ch == '<') || (ch == '>') ) break;
		}
		
		outputStr.append ( (char *) runStart, (runEnd - runStart) );
		
		if ( runEnd < runLimit ) {

			if ( ch < 0x20 ) {
			
				XMP_Assert ( (ch == kTab) || (ch == kLF) || (ch == kCR) );

				char hexBuf[16];
				memcpy ( hexBuf, "&#xn;", 6 );	// AUDIT: Length of "&#xn;" is 5, hexBuf size is 16.
				hexBuf[3] = kHexDigits[ch&0xF];
				outputStr.append ( hexBuf, 5 );

			} else {

				if ( ch == '"' ) {
					outputStr += "&quot;";
				} else if ( ch == '<' ) {
					outputStr += "&lt;";
				} else if ( ch == '>' ) {
					outputStr += "&gt;";
				} else {
					XMP_Assert ( ch == '&' );
					outputStr += "&amp;";
				}

			}

			++runEnd;

		}
		
		runStart = runEnd;
	
	}

}	// AppendNodeValue

//.........这里部分代码省略.........
			if ( (charKind == UCK_normal) || (charKind == UCK_quote) ) break;
		}
		if ( itemStart >= endPos ) break;
		
		if ( charKind != UCK_quote ) {
		
			// This is not a quoted value. Scan for the end, create an array item from the substring.

			for ( itemEnd = itemStart; itemEnd < endPos; itemEnd += charSize ) {

				ClassifyCharacter ( catedStr, itemEnd, &charKind, &charSize, &uniChar );

				if ( (charKind == UCK_normal) || (charKind == UCK_quote) ) continue;
				if ( (charKind == UCK_comma) && preserveCommas ) continue;
				if ( charKind != UCK_space ) break;

				if ( (itemEnd + charSize) >= endPos ) break;	// Anything left?
				ClassifyCharacter ( catedStr, (itemEnd+charSize), &nextKind, &nextSize, &nextChar );
				if ( (nextKind == UCK_normal) || (nextKind == UCK_quote) ) continue;
				if ( (nextKind == UCK_comma) && preserveCommas ) continue;
				break;	// Have multiple spaces, or a space followed by a separator.

			}		

			itemValue.assign ( catedStr, itemStart, (itemEnd - itemStart) );
		
		} else {
		
			// Accumulate quoted values into a local string, undoubling internal quotes that
			// match the surrounding quotes. Do not undouble "unmatching" quotes.
		
			UniCodePoint openQuote = uniChar;
			UniCodePoint closeQuote = GetClosingQuote ( openQuote );

			itemStart += charSize;	// Skip the opening quote;
			itemValue.erase();
			
			for ( itemEnd = itemStart; itemEnd < endPos; itemEnd += charSize ) {

				ClassifyCharacter ( catedStr, itemEnd, &charKind, &charSize, &uniChar );

				if ( (charKind != UCK_quote) || (! IsSurroundingQuote ( uniChar, openQuote, closeQuote)) ) {
				
					// This is not a matching quote, just append it to the item value.
					itemValue.append ( catedStr, itemEnd, charSize );
					
				} else {
				
					// This is a "matching" quote. Is it doubled, or the final closing quote? Tolerate
					// various edge cases like undoubled opening (non-closing) quotes, or end of input.
					
					if ( (itemEnd + charSize) < endPos ) {
						ClassifyCharacter ( catedStr, itemEnd+charSize, &nextKind, &nextSize, &nextChar );
					} else {
						nextKind = UCK_semicolon; nextSize = 0; nextChar = 0x3B;
					}
					
					if ( uniChar == nextChar ) {
						// This is doubled, copy it and skip the double.
						itemValue.append ( catedStr, itemEnd, charSize );
						itemEnd += nextSize;	// Loop will add in charSize.
					} else if ( ! IsClosingingQuote ( uniChar, openQuote, closeQuote ) ) {
						// This is an undoubled, non-closing quote, copy it.
						itemValue.append ( catedStr, itemEnd, charSize );
					} else {
						// This is an undoubled closing quote, skip it and exit the loop.
						itemEnd += charSize;
						break;
					}

				}

			}	// Loop to accumulate the quoted value.
		
		}

		// Add the separated item to the array. Keep a matching old value in case it had separators.
		
		size_t oldChild;
		for ( oldChild = 0; oldChild < oldChildCount; ++oldChild ) {
			if ( (oldChildren[oldChild] != 0) && (itemValue == oldChildren[oldChild]->value) ) break;
		}
		
		XMP_Node * newItem = 0;
		if ( oldChild == oldChildCount ) {
			newItem = new XMP_Node ( arrayNode, kXMP_ArrayItemName, itemValue.c_str(), 0 );
		} else {
			newItem = oldChildren[oldChild];
			oldChildren[oldChild] = 0;	// ! Don't match again, let duplicates be seen.
		}
		arrayNode->children.push_back ( newItem );
		
	}	// Loop through all of the returned items.

	// Delete any of the old children that were not kept.
	for ( size_t i = 0; i < oldChildCount; ++i ) {
		if ( oldChildren[i] != 0 ) delete oldChildren[i];
	}
	
}	// SeparateArrayItems

static void
ApplyQuotes ( XMP_VarString * item, UniCodePoint openQuote, UniCodePoint closeQuote, bool allowCommas )
{
	bool	prevSpace	= false;
	size_t	charOffset, charLen;
	UniCharKind		charKind;
	UniCodePoint	uniChar;
	
	// -----------------------------------------------------------------------------------------
	// See if there are any separators in the value. Stop at the first occurrance. This is a bit
	// tricky in order to make typical typing work conveniently. The purpose of applying quotes
	// is to preserve the values when splitting them back apart. That is CatenateContainerItems
	// and SeparateContainerItems must round trip properly. For the most part we only look for
	// separators here. Internal quotes, as in -- Irving "Bud" Jones -- won't cause problems in
	// the separation. An initial quote will though, it will make the value look quoted.

	charOffset = 0;
	ClassifyCharacter ( item->c_str(), charOffset, &charKind, &charLen, &uniChar );
	
	if ( charKind != UCK_quote ) {
	
	for ( charOffset = 0; size_t(charOffset) < item->size(); charOffset += charLen ) {

			ClassifyCharacter ( item->c_str(), charOffset, &charKind, &charLen, &uniChar );

			if ( charKind == UCK_space ) {
				if ( prevSpace ) break; // Multiple spaces are a separator.
				prevSpace = true;
			} else {
				prevSpace = false;
				if ( (charKind == UCK_semicolon) || (charKind == UCK_control) ) break;
				if ( (charKind == UCK_comma) && (! allowCommas) ) break;
			}

		}
	
	}
	
	if ( size_t(charOffset) < item->size() ) {
	
		// --------------------------------------------------------------------------------------
		// Create a quoted copy, doubling any internal quotes that match the outer ones. Internal
		// quotes did not stop the "needs quoting" search, but they do need doubling. So we have
		// to rescan the front of the string for quotes. Handle the special case of U+301D being
		// closed by either U+301E or U+301F.
		
		XMP_VarString	newItem;
		size_t			splitPoint;
		
		for ( splitPoint = 0; splitPoint <= charOffset; ++splitPoint ) {
			ClassifyCharacter ( item->c_str(), splitPoint, &charKind, &charLen, &uniChar );
			if ( charKind == UCK_quote ) break;
		}
		
		CodePointToUTF8 ( openQuote, newItem );
		newItem.append ( *item, 0, splitPoint );	// Copy the leading "normal" portion.

		for ( charOffset = splitPoint; size_t(charOffset) < item->size(); charOffset += charLen ) {
			ClassifyCharacter ( item->c_str(), charOffset, &charKind, &charLen, &uniChar );
			newItem.append ( *item, charOffset, charLen );
			if ( (charKind == UCK_quote) && IsSurroundingQuote ( uniChar, openQuote, closeQuote ) ) {
				newItem.append ( *item, charOffset, charLen );
			}
		}
		
		XMP_VarString closeStr;
		CodePointToUTF8 ( closeQuote, closeStr );
		newItem.append ( closeStr );
		
		*item = newItem;
	
	}
	
}	// ApplyQuotes