+
+wxPluralFormsNodePtr::~wxPluralFormsNodePtr()
+{
+ delete m_p;
+}
+wxPluralFormsNode* wxPluralFormsNodePtr::release()
+{
+ wxPluralFormsNode *p = m_p;
+ m_p = NULL;
+ return p;
+}
+void wxPluralFormsNodePtr::reset(wxPluralFormsNode *p)
+{
+ if (p != m_p)
+ {
+ delete m_p;
+ m_p = p;
+ }
+}
+
+
+void wxPluralFormsNode::setNode(size_t i, wxPluralFormsNode* n)
+{
+ m_nodes[i].reset(n);
+}
+
+wxPluralFormsNode* wxPluralFormsNode::releaseNode(size_t i)
+{
+ return m_nodes[i].release();
+}
+
+wxPluralFormsToken::Number
+wxPluralFormsNode::evaluate(wxPluralFormsToken::Number n) const
+{
+ switch (token().type())
+ {
+ // leaf
+ case wxPluralFormsToken::T_NUMBER:
+ return token().number();
+ case wxPluralFormsToken::T_N:
+ return n;
+ // 2 args
+ case wxPluralFormsToken::T_EQUAL:
+ return node(0)->evaluate(n) == node(1)->evaluate(n);
+ case wxPluralFormsToken::T_NOT_EQUAL:
+ return node(0)->evaluate(n) != node(1)->evaluate(n);
+ case wxPluralFormsToken::T_GREATER:
+ return node(0)->evaluate(n) > node(1)->evaluate(n);
+ case wxPluralFormsToken::T_GREATER_OR_EQUAL:
+ return node(0)->evaluate(n) >= node(1)->evaluate(n);
+ case wxPluralFormsToken::T_LESS:
+ return node(0)->evaluate(n) < node(1)->evaluate(n);
+ case wxPluralFormsToken::T_LESS_OR_EQUAL:
+ return node(0)->evaluate(n) <= node(1)->evaluate(n);
+ case wxPluralFormsToken::T_REMINDER:
+ {
+ wxPluralFormsToken::Number number = node(1)->evaluate(n);
+ if (number != 0)
+ {
+ return node(0)->evaluate(n) % number;
+ }
+ else
+ {
+ return 0;
+ }
+ }
+ case wxPluralFormsToken::T_LOGICAL_AND:
+ return node(0)->evaluate(n) && node(1)->evaluate(n);
+ case wxPluralFormsToken::T_LOGICAL_OR:
+ return node(0)->evaluate(n) || node(1)->evaluate(n);
+ // 3 args
+ case wxPluralFormsToken::T_QUESTION:
+ return node(0)->evaluate(n)
+ ? node(1)->evaluate(n)
+ : node(2)->evaluate(n);
+ default:
+ return 0;
+ }
+}
+
+
+class wxPluralFormsCalculator
+{
+public:
+ wxPluralFormsCalculator() : m_nplurals(0), m_plural(0) {}
+
+ // input: number, returns msgstr index
+ int evaluate(int n) const;
+
+ // input: text after "Plural-Forms:" (e.g. "nplurals=2; plural=(n != 1);"),
+ // if s == 0, creates default handler
+ // returns 0 if error
+ static wxPluralFormsCalculator* make(const char* s = 0);
+
+ ~wxPluralFormsCalculator() {}
+
+ void init(wxPluralFormsToken::Number nplurals, wxPluralFormsNode* plural);
+ wxString getString() const;
+
+private:
+ wxPluralFormsToken::Number m_nplurals;
+ wxPluralFormsNodePtr m_plural;
+};
+
+wxDEFINE_SCOPED_PTR_TYPE(wxPluralFormsCalculator);
+
+void wxPluralFormsCalculator::init(wxPluralFormsToken::Number nplurals,
+ wxPluralFormsNode* plural)
+{
+ m_nplurals = nplurals;
+ m_plural.reset(plural);
+}
+
+int wxPluralFormsCalculator::evaluate(int n) const
+{
+ if (m_plural.get() == 0)
+ {
+ return 0;
+ }
+ wxPluralFormsToken::Number number = m_plural->evaluate(n);
+ if (number < 0 || number > m_nplurals)
+ {
+ return 0;
+ }
+ return number;
+}
+
+
+class wxPluralFormsParser
+{
+public:
+ wxPluralFormsParser(wxPluralFormsScanner& scanner) : m_scanner(scanner) {}
+ bool parse(wxPluralFormsCalculator& rCalculator);
+
+private:
+ wxPluralFormsNode* parsePlural();
+ // stops at T_SEMICOLON, returns 0 if error
+ wxPluralFormsScanner& m_scanner;
+ const wxPluralFormsToken& token() const;
+ bool nextToken();
+
+ wxPluralFormsNode* expression();
+ wxPluralFormsNode* logicalOrExpression();
+ wxPluralFormsNode* logicalAndExpression();
+ wxPluralFormsNode* equalityExpression();
+ wxPluralFormsNode* multiplicativeExpression();
+ wxPluralFormsNode* relationalExpression();
+ wxPluralFormsNode* pmExpression();
+};
+
+bool wxPluralFormsParser::parse(wxPluralFormsCalculator& rCalculator)
+{
+ if (token().type() != wxPluralFormsToken::T_NPLURALS)
+ return false;
+ if (!nextToken())
+ return false;
+ if (token().type() != wxPluralFormsToken::T_ASSIGN)
+ return false;
+ if (!nextToken())
+ return false;
+ if (token().type() != wxPluralFormsToken::T_NUMBER)
+ return false;
+ wxPluralFormsToken::Number nplurals = token().number();
+ if (!nextToken())
+ return false;
+ if (token().type() != wxPluralFormsToken::T_SEMICOLON)
+ return false;
+ if (!nextToken())
+ return false;
+ if (token().type() != wxPluralFormsToken::T_PLURAL)
+ return false;
+ if (!nextToken())
+ return false;
+ if (token().type() != wxPluralFormsToken::T_ASSIGN)
+ return false;
+ if (!nextToken())
+ return false;
+ wxPluralFormsNode* plural = parsePlural();
+ if (plural == 0)
+ return false;
+ if (token().type() != wxPluralFormsToken::T_SEMICOLON)
+ return false;
+ if (!nextToken())
+ return false;
+ if (token().type() != wxPluralFormsToken::T_EOF)
+ return false;
+ rCalculator.init(nplurals, plural);
+ return true;
+}
+
+wxPluralFormsNode* wxPluralFormsParser::parsePlural()
+{
+ wxPluralFormsNode* p = expression();
+ if (p == NULL)
+ {
+ return NULL;
+ }
+ wxPluralFormsNodePtr n(p);
+ if (token().type() != wxPluralFormsToken::T_SEMICOLON)
+ {
+ return NULL;
+ }
+ return n.release();
+}
+
+const wxPluralFormsToken& wxPluralFormsParser::token() const
+{
+ return m_scanner.token();
+}
+
+bool wxPluralFormsParser::nextToken()
+{
+ if (!m_scanner.nextToken())
+ return false;
+ return true;
+}
+
+wxPluralFormsNode* wxPluralFormsParser::expression()
+{
+ wxPluralFormsNode* p = logicalOrExpression();
+ if (p == NULL)
+ return NULL;
+ wxPluralFormsNodePtr n(p);
+ if (token().type() == wxPluralFormsToken::T_QUESTION)
+ {
+ wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+ if (!nextToken())
+ {
+ return 0;
+ }
+ p = expression();
+ if (p == 0)
+ {
+ return 0;
+ }
+ qn->setNode(1, p);
+ if (token().type() != wxPluralFormsToken::T_COLON)
+ {
+ return 0;
+ }
+ if (!nextToken())
+ {
+ return 0;
+ }
+ p = expression();
+ if (p == 0)
+ {
+ return 0;
+ }
+ qn->setNode(2, p);
+ qn->setNode(0, n.release());
+ return qn.release();
+ }
+ return n.release();
+}
+
+wxPluralFormsNode*wxPluralFormsParser::logicalOrExpression()
+{
+ wxPluralFormsNode* p = logicalAndExpression();
+ if (p == NULL)
+ return NULL;
+ wxPluralFormsNodePtr ln(p);
+ if (token().type() == wxPluralFormsToken::T_LOGICAL_OR)
+ {
+ wxPluralFormsNodePtr un(new wxPluralFormsNode(token()));
+ if (!nextToken())
+ {
+ return 0;
+ }
+ p = logicalOrExpression();
+ if (p == 0)
+ {
+ return 0;
+ }
+ wxPluralFormsNodePtr rn(p); // right
+ if (rn->token().type() == wxPluralFormsToken::T_LOGICAL_OR)
+ {
+ // see logicalAndExpression comment
+ un->setNode(0, ln.release());
+ un->setNode(1, rn->releaseNode(0));
+ rn->setNode(0, un.release());
+ return rn.release();
+ }
+
+
+ un->setNode(0, ln.release());
+ un->setNode(1, rn.release());
+ return un.release();
+ }
+ return ln.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::logicalAndExpression()
+{
+ wxPluralFormsNode* p = equalityExpression();
+ if (p == NULL)
+ return NULL;
+ wxPluralFormsNodePtr ln(p); // left
+ if (token().type() == wxPluralFormsToken::T_LOGICAL_AND)
+ {
+ wxPluralFormsNodePtr un(new wxPluralFormsNode(token())); // up
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ p = logicalAndExpression();
+ if (p == 0)
+ {
+ return NULL;
+ }
+ wxPluralFormsNodePtr rn(p); // right
+ if (rn->token().type() == wxPluralFormsToken::T_LOGICAL_AND)
+ {
+// transform 1 && (2 && 3) -> (1 && 2) && 3
+// u r
+// l r -> u 3
+// 2 3 l 2
+ un->setNode(0, ln.release());
+ un->setNode(1, rn->releaseNode(0));
+ rn->setNode(0, un.release());
+ return rn.release();
+ }
+
+ un->setNode(0, ln.release());
+ un->setNode(1, rn.release());
+ return un.release();
+ }
+ return ln.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::equalityExpression()
+{
+ wxPluralFormsNode* p = relationalExpression();
+ if (p == NULL)
+ return NULL;
+ wxPluralFormsNodePtr n(p);
+ if (token().type() == wxPluralFormsToken::T_EQUAL
+ || token().type() == wxPluralFormsToken::T_NOT_EQUAL)
+ {
+ wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ p = relationalExpression();
+ if (p == NULL)
+ {
+ return NULL;
+ }
+ qn->setNode(1, p);
+ qn->setNode(0, n.release());
+ return qn.release();
+ }
+ return n.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::relationalExpression()
+{
+ wxPluralFormsNode* p = multiplicativeExpression();
+ if (p == NULL)
+ return NULL;
+ wxPluralFormsNodePtr n(p);
+ if (token().type() == wxPluralFormsToken::T_GREATER
+ || token().type() == wxPluralFormsToken::T_LESS
+ || token().type() == wxPluralFormsToken::T_GREATER_OR_EQUAL
+ || token().type() == wxPluralFormsToken::T_LESS_OR_EQUAL)
+ {
+ wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ p = multiplicativeExpression();
+ if (p == NULL)
+ {
+ return NULL;
+ }
+ qn->setNode(1, p);
+ qn->setNode(0, n.release());
+ return qn.release();
+ }
+ return n.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::multiplicativeExpression()
+{
+ wxPluralFormsNode* p = pmExpression();
+ if (p == NULL)
+ return NULL;
+ wxPluralFormsNodePtr n(p);
+ if (token().type() == wxPluralFormsToken::T_REMINDER)
+ {
+ wxPluralFormsNodePtr qn(new wxPluralFormsNode(token()));
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ p = pmExpression();
+ if (p == NULL)
+ {
+ return NULL;
+ }
+ qn->setNode(1, p);
+ qn->setNode(0, n.release());
+ return qn.release();
+ }
+ return n.release();
+}
+
+wxPluralFormsNode* wxPluralFormsParser::pmExpression()
+{
+ wxPluralFormsNodePtr n;
+ if (token().type() == wxPluralFormsToken::T_N
+ || token().type() == wxPluralFormsToken::T_NUMBER)
+ {
+ n.reset(new wxPluralFormsNode(token()));
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ }
+ else if (token().type() == wxPluralFormsToken::T_LEFT_BRACKET) {
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ wxPluralFormsNode* p = expression();
+ if (p == NULL)
+ {
+ return NULL;
+ }
+ n.reset(p);
+ if (token().type() != wxPluralFormsToken::T_RIGHT_BRACKET)
+ {
+ return NULL;
+ }
+ if (!nextToken())
+ {
+ return NULL;
+ }
+ }
+ else
+ {
+ return NULL;
+ }
+ return n.release();
+}
+
+wxPluralFormsCalculator* wxPluralFormsCalculator::make(const char* s)
+{
+ wxPluralFormsCalculatorPtr calculator(new wxPluralFormsCalculator);
+ if (s != NULL)
+ {
+ wxPluralFormsScanner scanner(s);
+ wxPluralFormsParser p(scanner);
+ if (!p.parse(*calculator))
+ {
+ return NULL;
+ }
+ }
+ return calculator.release();
+}
+
+
+
projects / wxWidgets.git / blobdiff