new loplugin: memoryvar

detect when we can convert a new/delete sequence on a local variable to
use std::unique_ptr

Change-Id: Iecae4e4197eccdfacfce2eed39aa4a69e4a660bc
Reviewed-on: https://gerrit.libreoffice.org/19884
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>

3 files changed, 9 insertions, 12 deletions

diff --git a/sdext/source/minimizer/pppoptimizertoken.cxx b/sdext/source/minimizer/pppoptimizertoken.cxx
index d24b35e2998d..d99c49bfb15b 100644
--- a/sdext/source/minimizer/pppoptimizertoken.cxx
+++ b/sdext/source/minimizer/pppoptimizertoken.cxx
@@ -23,6 +23,7 @@
 #include <sal/macros.h>
 #include <string.h>
 #include <unordered_map>
+#include <memory>
 
 typedef std::unordered_map< const char*, PPPOptimizerTokenEnum, rtl::CStringHash, rtl::CStringEqual> TypeNameHashMap;
 static TypeNameHashMap* pHashMap = nullptr;
@@ -172,12 +173,11 @@ PPPOptimizerTokenEnum TKGet( const OUString& rToken )
     }
     PPPOptimizerTokenEnum eRetValue = TK_NotFound;
     int i, nLen = rToken.getLength();
-    char* pBuf = new char[ nLen + 1 ];
+    std::unique_ptr<char[]> pBuf(new char[ nLen + 1 ]);
     for ( i = 0; i < nLen; i++ )
         pBuf[ i ] = (char)rToken[ i ];
     pBuf[ i ] = 0;
-    TypeNameHashMap::iterator aHashIter( pHashMap->find( pBuf ) );
-    delete[] pBuf;
+    TypeNameHashMap::iterator aHashIter( pHashMap->find( pBuf.get() ) );
     if ( aHashIter != pHashMap->end() )
         eRetValue = (*aHashIter).second;
     return eRetValue;
diff --git a/sdext/source/pdfimport/wrapper/wrapper.cxx b/sdext/source/pdfimport/wrapper/wrapper.cxx
index 5e1584e4cfba..74e17f87c118 100644
--- a/sdext/source/pdfimport/wrapper/wrapper.cxx
+++ b/sdext/source/pdfimport/wrapper/wrapper.cxx
@@ -203,10 +203,10 @@ namespace
     {
         const size_t nOrigLen(sal::static_int_cast<size_t>(i_rStr.getLength()));
         const sal_Char* const pOrig(i_rStr.getStr());
-        sal_Char* const pBuffer(new sal_Char[nOrigLen + 1]);
+        std::unique_ptr<sal_Char[]> pBuffer(new sal_Char[nOrigLen + 1]);
 
         const sal_Char* pRead(pOrig);
-        sal_Char* pWrite(pBuffer);
+        sal_Char* pWrite(pBuffer.get());
         const sal_Char* pCur(pOrig);
         while ((pCur = strchr(pCur, '\\')) != nullptr)
         {
@@ -237,8 +237,7 @@ namespace
         }
         *pWrite = '\0';
 
-        OString aResult(pBuffer);
-        delete[] pBuffer;
+        OString aResult(pBuffer.get());
         return aResult;
     }
 
diff --git a/sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx b/sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx
index c81adc331dbf..b67d6613ba42 100644
--- a/sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx
+++ b/sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx
@@ -26,6 +26,7 @@
 #include <math.h>
 
 #include <boost/shared_array.hpp>
+#include <memory>
 
 #if defined _MSC_VER
 #pragma warning(push, 1)
@@ -309,11 +310,11 @@ void writePpm_( OutputBuffer&     o_rOutputBuf,
     // initialize stream
     Guchar *p;
     GfxRGB rgb;
-    ImageStream* imgStr =
+    std::unique_ptr<ImageStream> imgStr(
         new ImageStream(str,
                         width,
                         colorMap->getNumPixelComps(),
-                        colorMap->getBits());
+                        colorMap->getBits()));
     imgStr->reset();
 
     for( int y=0; y<height; ++y)
@@ -329,9 +330,6 @@ void writePpm_( OutputBuffer&     o_rOutputBuf,
             p +=colorMap->getNumPixelComps();
         }
     }
-
-    delete imgStr;
-
 }
 
 // call this only for 1 bit image streams !