diff options
| author | George Hazan <ghazan@miranda.im> | 2019-02-14 14:01:44 +0300 |
|---|---|---|
| committer | George Hazan <ghazan@miranda.im> | 2019-02-14 14:01:44 +0300 |
| commit | 8368f365becd8668dbce2e40cecc7ba4f882f41b (patch) | |
| tree | d446e441cf00d86f5cfb59ac5fd91cad6c0d37c8 /include | |
| parent | 2a704d136a65cc39ead589a6bbbc99b28a4bab82 (diff) | |
XML iterators, first version
Diffstat (limited to 'include')
| -rw-r--r-- | include/m_xml.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/include/m_xml.h b/include/m_xml.h index 1c8dffc1f5..ee50229082 100644 --- a/include/m_xml.h +++ b/include/m_xml.h @@ -45,6 +45,134 @@ typedef tinyxml2::XMLElement TiXmlElement; typedef tinyxml2::XMLDocument TiXmlDocument;
/////////////////////////////////////////////////////////////////////////////////////////
+// simple element iterator
+//
+// allows traversing subnodes in a cycle like
+// for (auto *pNode : TiXmlEnum(pRoot)) {
+
+class TiXmlIterator
+{
+ const TiXmlElement *m_pCurr;
+
+public:
+ TiXmlIterator(const TiXmlElement *pNode) :
+ m_pCurr(pNode)
+ {
+ }
+
+ TiXmlIterator& operator=(const TiXmlElement *pNode)
+ {
+ m_pCurr = pNode;
+ return *this;
+ }
+
+ // Prefix ++ overload
+ TiXmlIterator& operator++()
+ {
+ if (m_pCurr)
+ m_pCurr = m_pCurr->NextSiblingElement();
+ return *this;
+ }
+
+ const TiXmlElement* operator*()
+ {
+ return m_pCurr;
+ }
+
+ bool operator!=(const TiXmlIterator &iterator)
+ {
+ return m_pCurr != iterator.m_pCurr;
+ }
+};
+
+class TiXmlEnum
+{
+ const TiXmlElement *m_pFirst;
+
+public:
+ TiXmlEnum(const TiXmlNode *pNode)
+ {
+ m_pFirst = (pNode) ? pNode->FirstChildElement() : nullptr;
+ }
+
+ TiXmlIterator begin()
+ {
+ return TiXmlIterator(m_pFirst);
+ }
+
+ TiXmlIterator end()
+ {
+ return TiXmlIterator(nullptr);
+ }
+};
+
+/////////////////////////////////////////////////////////////////////////////////////////
+// filtered element iterator
+//
+// allows traversing subnodes of the specified name in a cycle like
+// for (auto *pNode : TiXmlFilter(pRoot, "element")) {
+
+class TiXmlFilterIterator
+{
+ const TiXmlElement *m_pCurr;
+ const char *m_pszFilter;
+
+public:
+ TiXmlFilterIterator(const TiXmlElement *pNode, const char *pszNodeName) :
+ m_pszFilter(pszNodeName),
+ m_pCurr(pNode)
+ {
+ }
+
+ TiXmlFilterIterator& operator=(const TiXmlElement *pNode)
+ {
+ m_pCurr = pNode;
+ return *this;
+ }
+
+ // Prefix ++ overload
+ TiXmlFilterIterator& operator++()
+ {
+ if (m_pCurr)
+ m_pCurr = m_pCurr->NextSiblingElement(m_pszFilter);
+ return *this;
+ }
+
+ const TiXmlElement* operator*()
+ {
+ return m_pCurr;
+ }
+
+ bool operator!=(const TiXmlFilterIterator &iterator)
+ {
+ return m_pCurr != iterator.m_pCurr;
+ }
+};
+
+class TiXmlFilter
+{
+ const TiXmlElement *m_pFirst;
+ const char *m_pszFilter;
+
+public:
+ TiXmlFilter(const TiXmlNode *pNode, const char *pszNodeName) :
+ m_pszFilter(pszNodeName)
+ {
+ m_pFirst = (pNode) ? pNode->FirstChildElement() : nullptr;
+ }
+
+ TiXmlFilterIterator begin()
+ {
+ return TiXmlFilterIterator(m_pFirst, m_pszFilter);
+ }
+
+ TiXmlFilterIterator end()
+ {
+ return TiXmlFilterIterator(nullptr, nullptr);
+ }
+};
+
+/////////////////////////////////////////////////////////////////////////////////////////
// old API to be removed once
DECLARE_HANDLE(HXML);
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