added wxString::EndsWith() (patch 1483049)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39069 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -72,6 +72,7 @@ All:
 - Fixed bug where wxDateTime::Now() would sometimes return an incorrect value
   the first time it was called.
 - Added wxString::rbegin() and rend()
+- Added wxString::EndsWith()
 
 
 All (GUI):

docs/latex/wx/wxstring.tex

@@ -124,7 +124,8 @@ length of the prefix then.
 \helpref{CmpNoCase}{wxstringcmpnocase}\\
 \helpref{IsSameAs}{wxstringissameas}\\
 \helpref{Matches}{wxstringmatches}\\
-\helpref{StartsWith}{wxstringstartswith}
+\helpref{StartsWith}{wxstringstartswith}\\
+\helpref{EndsWith}{wxstringendswith}
 
 \membersection{Substring extraction}\label{substringextractioninwxstring}
 
@@ -140,7 +141,9 @@ substring.
 \helpref{BeforeLast}{wxstringbeforelast}\\
 \helpref{AfterFirst}{wxstringafterfirst}\\
 \helpref{AfterLast}{wxstringafterlast}\\
-\helpref{StartsWith}{wxstringstartswith}
+\helpref{StartsWith}{wxstringstartswith}\\
+\helpref{EndsWith}{wxstringendswith}
+
 
 \membersection{Case conversion}\label{caseconversioninwxstring}
 
@@ -967,6 +970,16 @@ of the string (i.e. after the prefix) into {\it rest} string if it is not
 {\tt NULL}. Otherwise, the function returns {\tt false} and doesn't modify the 
 {\it rest}.
 
+\membersection{wxString::EndsWith}\label{wxstringendswith}
+
+\constfunc{bool}{EndsWith}{\param{const wxChar }{*suffix}, \param{wxString }{*rest = NULL}}
+
+This function can be used to test if the string ends with the specified 
+{\it suffix}. If it does, the function will return {\tt true} and put the
+beginning of the string before the suffix into {\it rest} string if it is not 
+{\tt NULL}. Otherwise, the function returns {\tt false} and doesn't
+modify the {\it rest}.
+
 \membersection{wxString::Strip}\label{wxstringstrip}
 
 \begin{verbatim}

include/wx/string.h

@@ -1056,10 +1056,14 @@ public:
   wxString  operator()(size_t start, size_t len) const
     { return Mid(start, len); }
 
-      // check that the string starts with prefix and return the rest of the
-      // string in the provided pointer if it is not NULL, otherwise return
-      // false
+      // check if the string starts with the given prefix and return the rest
+      // of the string in the provided pointer if it is not NULL; otherwise
+      // return false
   bool StartsWith(const wxChar *prefix, wxString *rest = NULL) const;
+      // check if the string ends with the given suffix and return the
+      // beginning of the string before the suffix in the provided pointer if
+      // it is not NULL; otherwise return false
+  bool EndsWith(const wxChar *suffix, wxString *rest = NULL) const;
 
       // get first nCount characters
   wxString Left(size_t nCount) const;

src/common/string.cpp

@@ -1394,6 +1394,27 @@ bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const
     return true;
 }
 
+
+// check that the string ends with suffix and return the rest of it in the
+// provided pointer if it is not NULL, otherwise return false
+bool wxString::EndsWith(const wxChar *suffix, wxString *rest) const
+{
+    wxASSERT_MSG( suffix, _T("invalid parameter in wxString::EndssWith") );
+
+    int start = length() - wxStrlen(suffix);
+    if ( start < 0 || wxStrcmp(c_str() + start, suffix) != 0 )
+        return false;
+
+    if ( rest )
+    {
+        // put the rest of the string into provided pointer
+        rest->assign(*this, 0, start);
+    }
+
+    return true;
+}
+
+
 // extract nCount last (rightmost) characters
 wxString wxString::Right(size_t nCount) const
 {

tests/strings/strings.cpp

@@ -166,10 +166,9 @@ void StringTestCase::Extraction()
     wxString rest;
 
     #define TEST_STARTS_WITH(prefix, correct_rest, result)                    \
-        CPPUNIT_ASSERT( \
-            ( s.StartsWith( prefix, &rest ) == result ) && \
-            ( ( result == false ) || ( wxStrcmp( correct_rest , rest ) == 0 ) ) \
-        )
+        CPPUNIT_ASSERT_EQUAL(result, s.StartsWith(prefix, &rest));            \
+        if ( result )                                                         \
+            CPPUNIT_ASSERT_EQUAL(wxString(correct_rest), rest)
 
     TEST_STARTS_WITH( _T("Hello"),           _T(", world!"),      true  );
     TEST_STARTS_WITH( _T("Hello, "),         _T("world!"),        true  );
@@ -180,6 +179,23 @@ void StringTestCase::Extraction()
     TEST_STARTS_WITH( _T("Hi"),              _T(""),              false );
 
     #undef TEST_STARTS_WITH
+
+    #define TEST_ENDS_WITH(suffix, correct_rest, result)                      \
+        CPPUNIT_ASSERT_EQUAL(result, s.EndsWith(suffix, &rest));              \
+        if ( result )                                                         \
+            CPPUNIT_ASSERT_EQUAL(wxString(correct_rest), rest)
+
+    TEST_ENDS_WITH( _T(""),                 _T("Hello, world!"), true  );
+    TEST_ENDS_WITH( _T("!"),                _T("Hello, world"),  true  );
+    TEST_ENDS_WITH( _T(", world!"),         _T("Hello"),         true  );
+    TEST_ENDS_WITH( _T("ello, world!"),     _T("H"),             true  );
+    TEST_ENDS_WITH( _T("Hello, world!"),    _T(""),              true  );
+    TEST_ENDS_WITH( _T("very long string"), _T(""),              false );
+    TEST_ENDS_WITH( _T("?"),                _T(""),              false );
+    TEST_ENDS_WITH( _T("Hello, world"),     _T(""),              false );
+    TEST_ENDS_WITH( _T("Gello, world!"),    _T(""),              false );
+
+    #undef TEST_ENDS_WITH
 }
 
 void StringTestCase::Find()