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Diffstat (limited to 'intl/icu/source/tools/toolutil/xmlparser.cpp')
| -rw-r--r-- | intl/icu/source/tools/toolutil/xmlparser.cpp | 827 |
1 files changed, 827 insertions, 0 deletions
diff --git a/intl/icu/source/tools/toolutil/xmlparser.cpp b/intl/icu/source/tools/toolutil/xmlparser.cpp new file mode 100644 index 000000000..1c158da59 --- /dev/null +++ b/intl/icu/source/tools/toolutil/xmlparser.cpp @@ -0,0 +1,827 @@ +// Copyright (C) 2016 and later: Unicode, Inc. and others. +// License & terms of use: http://www.unicode.org/copyright.html +/* +******************************************************************************* +* +* Copyright (C) 2004-2010, International Business Machines +* Corporation and others. All Rights Reserved. +* +******************************************************************************* +* file name: xmlparser.cpp +* encoding: US-ASCII +* tab size: 8 (not used) +* indentation:4 +* +* created on: 2004jul21 +* created by: Andy Heninger +*/ + +#include <stdio.h> +#include "unicode/uchar.h" +#include "unicode/ucnv.h" +#include "unicode/regex.h" +#include "filestrm.h" +#include "xmlparser.h" + +#if !UCONFIG_NO_REGULAR_EXPRESSIONS && !UCONFIG_NO_CONVERSION + +// character constants +enum { + x_QUOT=0x22, + x_AMP=0x26, + x_APOS=0x27, + x_LT=0x3c, + x_GT=0x3e, + x_l=0x6c +}; + +#define XML_SPACES "[ \\u0009\\u000d\\u000a]" + +// XML #4 +#define XML_NAMESTARTCHAR "[[A-Z]:_[a-z][\\u00c0-\\u00d6][\\u00d8-\\u00f6]" \ + "[\\u00f8-\\u02ff][\\u0370-\\u037d][\\u037F-\\u1FFF][\\u200C-\\u200D]" \ + "[\\u2070-\\u218F][\\u2C00-\\u2FEF][\\u3001-\\uD7FF][\\uF900-\\uFDCF]" \ + "[\\uFDF0-\\uFFFD][\\U00010000-\\U000EFFFF]]" + +// XML #5 +#define XML_NAMECHAR "[" XML_NAMESTARTCHAR "\\-.[0-9]\\u00b7[\\u0300-\\u036f][\\u203f-\\u2040]]" + +// XML #6 +#define XML_NAME XML_NAMESTARTCHAR "(?:" XML_NAMECHAR ")*" + +U_NAMESPACE_BEGIN + +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLParser) +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLElement) + +// +// UXMLParser constructor. Mostly just initializes the ICU regexes that are +// used for parsing. +// +UXMLParser::UXMLParser(UErrorCode &status) : + // XML Declaration. XML Production #23. + // example: "<?xml version=1.0 encoding="utf-16" ?> + // This is a sloppy implementation - just look for the leading <?xml and the closing ?> + // allow for a possible leading BOM. + mXMLDecl(UnicodeString("(?s)\\uFEFF?<\\?xml.+?\\?>", -1, US_INV), 0, status), + + // XML Comment production #15 + // example: "<!-- whatever --> + // note, does not detect an illegal "--" within comments + mXMLComment(UnicodeString("(?s)<!--.+?-->", -1, US_INV), 0, status), + + // XML Spaces + // production [3] + mXMLSP(UnicodeString(XML_SPACES "+", -1, US_INV), 0, status), + + // XML Doctype decl production #28 + // example "<!DOCTYPE foo SYSTEM "somewhere" > + // or "<!DOCTYPE foo [internal dtd]> + // TODO: we don't actually parse the DOCTYPE or internal subsets. + // Some internal dtd subsets could confuse this simple-minded + // attempt at skipping over them, specifically, occcurences + // of closeing square brackets. These could appear in comments, + // or in parameter entity declarations, for example. + mXMLDoctype(UnicodeString( + "(?s)<!DOCTYPE.*?(>|\\[.*?\\].*?>)", -1, US_INV + ), 0, status), + + // XML PI production #16 + // example "<?target stuff?> + mXMLPI(UnicodeString("(?s)<\\?.+?\\?>", -1, US_INV), 0, status), + + // XML Element Start Productions #40, #41 + // example <foo att1='abc' att2="d e f" > + // capture #1: the tag name + // + mXMLElemStart (UnicodeString("(?s)<(" XML_NAME ")" // match "<tag_name" + "(?:" + XML_SPACES "+" XML_NAME XML_SPACES "*=" XML_SPACES "*" // match "ATTR_NAME = " + "(?:(?:\\\'[^<\\\']*?\\\')|(?:\\\"[^<\\\"]*?\\\"))" // match '"attribute value"' + ")*" // * for zero or more attributes. + XML_SPACES "*?>", -1, US_INV), 0, status), // match " >" + + // XML Element End production #42 + // example </foo> + mXMLElemEnd (UnicodeString("</(" XML_NAME ")" XML_SPACES "*>", -1, US_INV), 0, status), + + // XML Element Empty production #44 + // example <foo att1="abc" att2="d e f" /> + mXMLElemEmpty (UnicodeString("(?s)<(" XML_NAME ")" // match "<tag_name" + "(?:" + XML_SPACES "+" XML_NAME XML_SPACES "*=" XML_SPACES "*" // match "ATTR_NAME = " + "(?:(?:\\\'[^<\\\']*?\\\')|(?:\\\"[^<\\\"]*?\\\"))" // match '"attribute value"' + ")*" // * for zero or more attributes. + XML_SPACES "*?/>", -1, US_INV), 0, status), // match " />" + + + // XMLCharData. Everything but '<'. Note that & will be dealt with later. + mXMLCharData(UnicodeString("(?s)[^<]*", -1, US_INV), 0, status), + + // Attribute name = "value". XML Productions 10, 40/41 + // Capture group 1 is name, + // 2 is the attribute value, including the quotes. + // + // Note that attributes are scanned twice. The first time is with + // the regex for an entire element start. There, the attributes + // are checked syntactically, but not separted out one by one. + // Here, we match a single attribute, and make its name and + // attribute value available to the parser code. + mAttrValue(UnicodeString(XML_SPACES "+(" XML_NAME ")" XML_SPACES "*=" XML_SPACES "*" + "((?:\\\'[^<\\\']*?\\\')|(?:\\\"[^<\\\"]*?\\\"))", -1, US_INV), 0, status), + + + mAttrNormalizer(UnicodeString(XML_SPACES, -1, US_INV), 0, status), + + // Match any of the new-line sequences in content. + // All are changed to \u000a. + mNewLineNormalizer(UnicodeString("\\u000d\\u000a|\\u000d\\u0085|\\u000a|\\u000d|\\u0085|\\u2028", -1, US_INV), 0, status), + + // & char references + // We will figure out what we've got based on which capture group has content. + // The last one is a catchall for unrecognized entity references.. + // 1 2 3 4 5 6 7 8 + mAmps(UnicodeString("&(?:(amp;)|(lt;)|(gt;)|(apos;)|(quot;)|#x([0-9A-Fa-f]{1,8});|#([0-9]{1,8});|(.))"), + 0, status), + + fNames(status), + fElementStack(status), + fOneLF((UChar)0x0a) // Plain new-line string, used in new line normalization. + { + } + +UXMLParser * +UXMLParser::createParser(UErrorCode &errorCode) { + if (U_FAILURE(errorCode)) { + return NULL; + } else { + return new UXMLParser(errorCode); + } +} + +UXMLParser::~UXMLParser() {} + +UXMLElement * +UXMLParser::parseFile(const char *filename, UErrorCode &errorCode) { + char bytes[4096], charsetBuffer[100]; + FileStream *f; + const char *charset, *pb; + UnicodeString src; + UConverter *cnv; + UChar *buffer, *pu; + int32_t fileLength, bytesLength, length, capacity; + UBool flush; + + if(U_FAILURE(errorCode)) { + return NULL; + } + + f=T_FileStream_open(filename, "rb"); + if(f==NULL) { + errorCode=U_FILE_ACCESS_ERROR; + return NULL; + } + + bytesLength=T_FileStream_read(f, bytes, (int32_t)sizeof(bytes)); + if(bytesLength<(int32_t)sizeof(bytes)) { + // we have already read the entire file + fileLength=bytesLength; + } else { + // get the file length + fileLength=T_FileStream_size(f); + } + + /* + * get the charset: + * 1. Unicode signature + * 2. treat as ISO-8859-1 and read XML encoding="charser" + * 3. default to UTF-8 + */ + charset=ucnv_detectUnicodeSignature(bytes, bytesLength, NULL, &errorCode); + if(U_SUCCESS(errorCode) && charset!=NULL) { + // open converter according to Unicode signature + cnv=ucnv_open(charset, &errorCode); + } else { + // read as Latin-1 and parse the XML declaration and encoding + cnv=ucnv_open("ISO-8859-1", &errorCode); + if(U_FAILURE(errorCode)) { + // unexpected error opening Latin-1 converter + goto exit; + } + + buffer=src.getBuffer(bytesLength); + if(buffer==NULL) { + // unexpected failure to reserve some string capacity + errorCode=U_MEMORY_ALLOCATION_ERROR; + goto exit; + } + pb=bytes; + pu=buffer; + ucnv_toUnicode( + cnv, + &pu, buffer+src.getCapacity(), + &pb, bytes+bytesLength, + NULL, TRUE, &errorCode); + src.releaseBuffer(U_SUCCESS(errorCode) ? (int32_t)(pu-buffer) : 0); + ucnv_close(cnv); + cnv=NULL; + if(U_FAILURE(errorCode)) { + // unexpected error in conversion from Latin-1 + src.remove(); + goto exit; + } + + // parse XML declaration + if(mXMLDecl.reset(src).lookingAt(0, errorCode)) { + int32_t declEnd=mXMLDecl.end(errorCode); + // go beyond <?xml + int32_t pos=src.indexOf((UChar)x_l)+1; + + mAttrValue.reset(src); + while(pos<declEnd && mAttrValue.lookingAt(pos, errorCode)) { // loop runs once per attribute on this element. + UnicodeString attName = mAttrValue.group(1, errorCode); + UnicodeString attValue = mAttrValue.group(2, errorCode); + + // Trim the quotes from the att value. These are left over from the original regex + // that parsed the attribue, which couldn't conveniently strip them. + attValue.remove(0,1); // one char from the beginning + attValue.truncate(attValue.length()-1); // and one from the end. + + if(attName==UNICODE_STRING("encoding", 8)) { + length=attValue.extract(0, 0x7fffffff, charsetBuffer, (int32_t)sizeof(charsetBuffer)); + charset=charsetBuffer; + break; + } + pos = mAttrValue.end(2, errorCode); + } + + if(charset==NULL) { + // default to UTF-8 + charset="UTF-8"; + } + cnv=ucnv_open(charset, &errorCode); + } + } + + if(U_FAILURE(errorCode)) { + // unable to open the converter + goto exit; + } + + // convert the file contents + capacity=fileLength; // estimated capacity + src.getBuffer(capacity); + src.releaseBuffer(0); // zero length + flush=FALSE; + for(;;) { + // convert contents of bytes[bytesLength] + pb=bytes; + for(;;) { + length=src.length(); + buffer=src.getBuffer(capacity); + if(buffer==NULL) { + // unexpected failure to reserve some string capacity + errorCode=U_MEMORY_ALLOCATION_ERROR; + goto exit; + } + + pu=buffer+length; + ucnv_toUnicode( + cnv, &pu, buffer+src.getCapacity(), + &pb, bytes+bytesLength, + NULL, FALSE, &errorCode); + src.releaseBuffer(U_SUCCESS(errorCode) ? (int32_t)(pu-buffer) : 0); + if(errorCode==U_BUFFER_OVERFLOW_ERROR) { + errorCode=U_ZERO_ERROR; + capacity=(3*src.getCapacity())/2; // increase capacity by 50% + } else { + break; + } + } + + if(U_FAILURE(errorCode)) { + break; // conversion error + } + + if(flush) { + break; // completely converted the file + } + + // read next block + bytesLength=T_FileStream_read(f, bytes, (int32_t)sizeof(bytes)); + if(bytesLength==0) { + // reached end of file, convert once more to flush the converter + flush=TRUE; + } + }; + +exit: + ucnv_close(cnv); + T_FileStream_close(f); + + if(U_SUCCESS(errorCode)) { + return parse(src, errorCode); + } else { + return NULL; + } +} + +UXMLElement * +UXMLParser::parse(const UnicodeString &src, UErrorCode &status) { + if(U_FAILURE(status)) { + return NULL; + } + + UXMLElement *root = NULL; + fPos = 0; // TODO use just a local pos variable and pass it into functions + // where necessary? + + // set all matchers to work on the input string + mXMLDecl.reset(src); + mXMLComment.reset(src); + mXMLSP.reset(src); + mXMLDoctype.reset(src); + mXMLPI.reset(src); + mXMLElemStart.reset(src); + mXMLElemEnd.reset(src); + mXMLElemEmpty.reset(src); + mXMLCharData.reset(src); + mAttrValue.reset(src); + mAttrNormalizer.reset(src); + mNewLineNormalizer.reset(src); + mAmps.reset(src); + + // Consume the XML Declaration, if present. + if (mXMLDecl.lookingAt(fPos, status)) { + fPos = mXMLDecl.end(status); + } + + // Consume "misc" [XML production 27] appearing before DocType + parseMisc(status); + + // Consume a DocType declaration, if present. + if (mXMLDoctype.lookingAt(fPos, status)) { + fPos = mXMLDoctype.end(status); + } + + // Consume additional "misc" [XML production 27] appearing after the DocType + parseMisc(status); + + // Get the root element + if (mXMLElemEmpty.lookingAt(fPos, status)) { + // Root is an empty element (no nested elements or content) + root = createElement(mXMLElemEmpty, status); + fPos = mXMLElemEmpty.end(status); + } else { + if (mXMLElemStart.lookingAt(fPos, status) == FALSE) { + error("Root Element expected", status); + goto errorExit; + } + root = createElement(mXMLElemStart, status); + UXMLElement *el = root; + + // + // This is the loop that consumes the root element of the document, + // including all nested content. Nested elements are handled by + // explicit pushes/pops of the element stack; there is no recursion + // in the control flow of this code. + // "el" always refers to the current element, the one to which content + // is being added. It is above the top of the element stack. + for (;;) { + // Nested Element Start + if (mXMLElemStart.lookingAt(fPos, status)) { + UXMLElement *t = createElement(mXMLElemStart, status); + el->fChildren.addElement(t, status); + t->fParent = el; + fElementStack.push(el, status); + el = t; + continue; + } + + // Text Content. String is concatenated onto the current node's content, + // but only if it contains something other than spaces. + UnicodeString s = scanContent(status); + if (s.length() > 0) { + mXMLSP.reset(s); + if (mXMLSP.matches(status) == FALSE) { + // This chunk of text contains something other than just + // white space. Make a child node for it. + replaceCharRefs(s, status); + el->fChildren.addElement(s.clone(), status); + } + mXMLSP.reset(src); // The matchers need to stay set to the main input string. + continue; + } + + // Comments. Discard. + if (mXMLComment.lookingAt(fPos, status)) { + fPos = mXMLComment.end(status); + continue; + } + + // PIs. Discard. + if (mXMLPI.lookingAt(fPos, status)) { + fPos = mXMLPI.end(status); + continue; + } + + // Element End + if (mXMLElemEnd.lookingAt(fPos, status)) { + fPos = mXMLElemEnd.end(0, status); + const UnicodeString name = mXMLElemEnd.group(1, status); + if (name != *el->fName) { + error("Element start / end tag mismatch", status); + goto errorExit; + } + if (fElementStack.empty()) { + // Close of the root element. We're done with the doc. + el = NULL; + break; + } + el = (UXMLElement *)fElementStack.pop(); + continue; + } + + // Empty Element. Stored as a child of the current element, but not stacked. + if (mXMLElemEmpty.lookingAt(fPos, status)) { + UXMLElement *t = createElement(mXMLElemEmpty, status); + el->fChildren.addElement(t, status); + continue; + } + + // Hit something within the document that doesn't match anything. + // It's an error. + error("Unrecognized markup", status); + break; + } + + if (el != NULL || !fElementStack.empty()) { + // We bailed out early, for some reason. + error("Root element not closed.", status); + goto errorExit; + } + } + + // Root Element parse is complete. + // Consume the annoying xml "Misc" that can appear at the end of the doc. + parseMisc(status); + + // We should have reached the end of the input + if (fPos != src.length()) { + error("Extra content at the end of the document", status); + goto errorExit; + } + + // Success! + return root; + +errorExit: + delete root; + return NULL; +} + +// +// createElement +// We've just matched an element start tag. Create and fill in a UXMLElement object +// for it. +// +UXMLElement * +UXMLParser::createElement(RegexMatcher &mEl, UErrorCode &status) { + // First capture group is the element's name. + UXMLElement *el = new UXMLElement(this, intern(mEl.group(1, status), status), status); + + // Scan for attributes. + int32_t pos = mEl.end(1, status); // The position after the end of the tag name + + while (mAttrValue.lookingAt(pos, status)) { // loop runs once per attribute on this element. + UnicodeString attName = mAttrValue.group(1, status); + UnicodeString attValue = mAttrValue.group(2, status); + + // Trim the quotes from the att value. These are left over from the original regex + // that parsed the attribue, which couldn't conveniently strip them. + attValue.remove(0,1); // one char from the beginning + attValue.truncate(attValue.length()-1); // and one from the end. + + // XML Attribue value normalization. + // This is one of the really screwy parts of the XML spec. + // See http://www.w3.org/TR/2004/REC-xml11-20040204/#AVNormalize + // Note that non-validating parsers must treat all entities as type CDATA + // which simplifies things some. + + // Att normalization step 1: normalize any newlines in the attribute value + mNewLineNormalizer.reset(attValue); + attValue = mNewLineNormalizer.replaceAll(fOneLF, status); + + // Next change all xml white space chars to plain \u0020 spaces. + mAttrNormalizer.reset(attValue); + UnicodeString oneSpace((UChar)0x0020); + attValue = mAttrNormalizer.replaceAll(oneSpace, status); + + // Replace character entities. + replaceCharRefs(attValue, status); + + // Save the attribute name and value in our document structure. + el->fAttNames.addElement((void *)intern(attName, status), status); + el->fAttValues.addElement(attValue.clone(), status); + pos = mAttrValue.end(2, status); + } + fPos = mEl.end(0, status); + return el; +} + +// +// parseMisc +// Consume XML "Misc" [production #27] +// which is any combination of space, PI and comments +// Need to watch end-of-input because xml MISC stuff is allowed after +// the document element, so we WILL scan off the end in this function +// +void +UXMLParser::parseMisc(UErrorCode &status) { + for (;;) { + if (fPos >= mXMLPI.input().length()) { + break; + } + if (mXMLPI.lookingAt(fPos, status)) { + fPos = mXMLPI.end(status); + continue; + } + if (mXMLSP.lookingAt(fPos, status)) { + fPos = mXMLSP.end(status); + continue; + } + if (mXMLComment.lookingAt(fPos, status)) { + fPos = mXMLComment.end(status); + continue; + } + break; + } +} + +// +// Scan for document content. +// +UnicodeString +UXMLParser::scanContent(UErrorCode &status) { + UnicodeString result; + if (mXMLCharData.lookingAt(fPos, status)) { + result = mXMLCharData.group((int32_t)0, status); + // Normalize the new-lines. (Before char ref substitution) + mNewLineNormalizer.reset(result); + result = mNewLineNormalizer.replaceAll(fOneLF, status); + + // TODO: handle CDATA + fPos = mXMLCharData.end(0, status); + } + + return result; +} + +// +// replaceCharRefs +// +// replace the char entities < & { ካ etc. in a string +// with the corresponding actual character. +// +void +UXMLParser::replaceCharRefs(UnicodeString &s, UErrorCode &status) { + UnicodeString result; + UnicodeString replacement; + int i; + + mAmps.reset(s); + // See the initialization for the regex matcher mAmps. + // Which entity we've matched is determined by which capture group has content, + // which is flaged by start() of that group not being -1. + while (mAmps.find()) { + if (mAmps.start(1, status) != -1) { + replacement.setTo((UChar)x_AMP); + } else if (mAmps.start(2, status) != -1) { + replacement.setTo((UChar)x_LT); + } else if (mAmps.start(3, status) != -1) { + replacement.setTo((UChar)x_GT); + } else if (mAmps.start(4, status) != -1) { + replacement.setTo((UChar)x_APOS); + } else if (mAmps.start(5, status) != -1) { + replacement.setTo((UChar)x_QUOT); + } else if (mAmps.start(6, status) != -1) { + UnicodeString hexString = mAmps.group(6, status); + UChar32 val = 0; + for (i=0; i<hexString.length(); i++) { + val = (val << 4) + u_digit(hexString.charAt(i), 16); + } + // TODO: some verification that the character is valid + replacement.setTo(val); + } else if (mAmps.start(7, status) != -1) { + UnicodeString decimalString = mAmps.group(7, status); + UChar32 val = 0; + for (i=0; i<decimalString.length(); i++) { + val = val*10 + u_digit(decimalString.charAt(i), 10); + } + // TODO: some verification that the character is valid + replacement.setTo(val); + } else { + // An unrecognized &entity; Leave it alone. + // TODO: check that it really looks like an entity, and is not some + // random & in the text. + replacement = mAmps.group((int32_t)0, status); + } + mAmps.appendReplacement(result, replacement, status); + } + mAmps.appendTail(result); + s = result; +} + +void +UXMLParser::error(const char *message, UErrorCode &status) { + // TODO: something better here... + const UnicodeString &src=mXMLDecl.input(); + int line = 0; + int ci = 0; + while (ci < fPos && ci>=0) { + ci = src.indexOf((UChar)0x0a, ci+1); + line++; + } + fprintf(stderr, "Error: %s at line %d\n", message, line); + if (U_SUCCESS(status)) { + status = U_PARSE_ERROR; + } +} + +// intern strings like in Java + +const UnicodeString * +UXMLParser::intern(const UnicodeString &s, UErrorCode &errorCode) { + const UHashElement *he=fNames.find(s); + if(he!=NULL) { + // already a known name, return its hashed key pointer + return (const UnicodeString *)he->key.pointer; + } else { + // add this new name and return its hashed key pointer + fNames.puti(s, 0, errorCode); + he=fNames.find(s); + return (const UnicodeString *)he->key.pointer; + } +} + +const UnicodeString * +UXMLParser::findName(const UnicodeString &s) const { + const UHashElement *he=fNames.find(s); + if(he!=NULL) { + // a known name, return its hashed key pointer + return (const UnicodeString *)he->key.pointer; + } else { + // unknown name + return NULL; + } +} + +// UXMLElement ------------------------------------------------------------- *** + +UXMLElement::UXMLElement(const UXMLParser *parser, const UnicodeString *name, UErrorCode &errorCode) : + fParser(parser), + fName(name), + fAttNames(errorCode), + fAttValues(errorCode), + fChildren(errorCode), + fParent(NULL) +{ +} + +UXMLElement::~UXMLElement() { + int i; + // attribute names are owned by the UXMLParser, don't delete them here + for (i=fAttValues.size()-1; i>=0; i--) { + delete (UObject *)fAttValues.elementAt(i); + } + for (i=fChildren.size()-1; i>=0; i--) { + delete (UObject *)fChildren.elementAt(i); + } +} + +const UnicodeString & +UXMLElement::getTagName() const { + return *fName; +} + +UnicodeString +UXMLElement::getText(UBool recurse) const { + UnicodeString text; + appendText(text, recurse); + return text; +} + +void +UXMLElement::appendText(UnicodeString &text, UBool recurse) const { + const UObject *node; + int32_t i, count=fChildren.size(); + for(i=0; i<count; ++i) { + node=(const UObject *)fChildren.elementAt(i); + const UnicodeString *s=dynamic_cast<const UnicodeString *>(node); + if(s!=NULL) { + text.append(*s); + } else if(recurse) /* must be a UXMLElement */ { + ((const UXMLElement *)node)->appendText(text, recurse); + } + } +} + +int32_t +UXMLElement::countAttributes() const { + return fAttNames.size(); +} + +const UnicodeString * +UXMLElement::getAttribute(int32_t i, UnicodeString &name, UnicodeString &value) const { + if(0<=i && i<fAttNames.size()) { + name.setTo(*(const UnicodeString *)fAttNames.elementAt(i)); + value.setTo(*(const UnicodeString *)fAttValues.elementAt(i)); + return &value; // or return (UnicodeString *)fAttValues.elementAt(i); + } else { + return NULL; + } +} + +const UnicodeString * +UXMLElement::getAttribute(const UnicodeString &name) const { + // search for the attribute name by comparing the interned pointer, + // not the string contents + const UnicodeString *p=fParser->findName(name); + if(p==NULL) { + return NULL; // no such attribute seen by the parser at all + } + + int32_t i, count=fAttNames.size(); + for(i=0; i<count; ++i) { + if(p==(const UnicodeString *)fAttNames.elementAt(i)) { + return (const UnicodeString *)fAttValues.elementAt(i); + } + } + return NULL; +} + +int32_t +UXMLElement::countChildren() const { + return fChildren.size(); +} + +const UObject * +UXMLElement::getChild(int32_t i, UXMLNodeType &type) const { + if(0<=i && i<fChildren.size()) { + const UObject *node=(const UObject *)fChildren.elementAt(i); + if(dynamic_cast<const UXMLElement *>(node)!=NULL) { + type=UXML_NODE_TYPE_ELEMENT; + } else { + type=UXML_NODE_TYPE_STRING; + } + return node; + } else { + return NULL; + } +} + +const UXMLElement * +UXMLElement::nextChildElement(int32_t &i) const { + if(i<0) { + return NULL; + } + + const UObject *node; + int32_t count=fChildren.size(); + while(i<count) { + node=(const UObject *)fChildren.elementAt(i++); + const UXMLElement *elem=dynamic_cast<const UXMLElement *>(node); + if(elem!=NULL) { + return elem; + } + } + return NULL; +} + +const UXMLElement * +UXMLElement::getChildElement(const UnicodeString &name) const { + // search for the element name by comparing the interned pointer, + // not the string contents + const UnicodeString *p=fParser->findName(name); + if(p==NULL) { + return NULL; // no such element seen by the parser at all + } + + const UObject *node; + int32_t i, count=fChildren.size(); + for(i=0; i<count; ++i) { + node=(const UObject *)fChildren.elementAt(i); + const UXMLElement *elem=dynamic_cast<const UXMLElement *>(node); + if(elem!=NULL) { + if(p==elem->fName) { + return elem; + } + } + } + return NULL; +} + +U_NAMESPACE_END + +#endif /* !UCONFIG_NO_REGULAR_EXPRESSIONS */ + |