From 3a1196e5f93410a1992f138065114794be55e182 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <hyd_danmar@users.sourceforge.net>
Date: Sat, 13 Dec 2008 16:42:39 +0000
Subject: [PATCH] Tokenizer : Added function for simplifying casts

---
 testmemleak.cpp |  8 ++++----
 tokenize.cpp    | 42 +++++++++++++++++++++++++++++++++++++++++-
 tokenize.h      |  4 +++-
 3 files changed, 48 insertions(+), 6 deletions(-)

diff --git a/testmemleak.cpp b/testmemleak.cpp
index 12c102f86..ddfbf0d0f 100644
--- a/testmemleak.cpp
+++ b/testmemleak.cpp
@@ -135,9 +135,9 @@ private:
 
         // TODO TEST_CASE( varid );
 
-		// TODO TEST_CASE( cast1 );
-		// TODO TEST_CASE( cast2 );	// Doesn't fail but for bad reasons
-		// TODO TEST_CASE( cast3 );
+		TEST_CASE( cast1 );
+		TEST_CASE( cast2 );
+		TEST_CASE( cast3 );
     }
 
 
@@ -1119,7 +1119,7 @@ private:
         check( "void foo()\n"
                "{\n"
 			   "    char *a = malloc(10);\n"
-			   "    free(reinterpret_cast<void *>(c));\n"
+			   "    free(reinterpret_cast<void *>(a));\n"
                "}\n" );
 
         ASSERT_EQUALS( std::string(""), errout.str() );
diff --git a/tokenize.cpp b/tokenize.cpp
index 8d9588ee1..a7d808b73 100644
--- a/tokenize.cpp
+++ b/tokenize.cpp
@@ -1014,7 +1014,8 @@ void Tokenizer::simplifyTokenList()
 
     for ( bool done = false; !done; done = true)
     {
-        done &= simplifyConditions();
+        done &= simplifyConditions();
+        done &= simplifyCasts();
     };
 }
 //---------------------------------------------------------------------------
@@ -1090,6 +1091,45 @@ bool Tokenizer::simplifyConditions()
     return ret;
 }
 
+
+bool Tokenizer::simplifyCasts()
+{
+    bool ret = true;
+    for ( TOKEN *tok = _tokens; tok; tok = tok->next() )
+    {
+        if ( TOKEN::Match(tok->next(), "( %type% * )") )
+        {
+            tok->deleteNext();
+            tok->deleteNext();
+            tok->deleteNext();
+            tok->deleteNext();
+            ret = false;
+        }
+
+        else if ( TOKEN::Match(tok->next(), "dynamic_cast|reinterpret_cast|const_cast <" ) )
+        {
+            while ( tok->next() && tok->next()->str() != ">" )
+                tok->deleteNext();
+            tok->deleteNext();
+            tok->deleteNext();
+            TOKEN *tok2 = tok;
+            int parlevel = 0;
+            while ( tok2->next() && parlevel >= 0 )
+            {
+                tok2 = tok2->next();
+                if ( TOKEN::Match(tok2->next(), "(") )
+                    ++parlevel;
+                else if ( TOKEN::Match(tok2->next(), ")") )
+                    --parlevel;
+            }
+            if (tok2->next())
+                tok2->deleteNext();
+        }
+    }
+
+    return ret;
+}
+
 
 //---------------------------------------------------------------------------
 // Helper functions for handling the tokens list
diff --git a/tokenize.h b/tokenize.h
index 7deddaa8e..a2f611bd1 100644
--- a/tokenize.h
+++ b/tokenize.h
@@ -95,7 +95,9 @@ private:
 
     void addtoken(const char str[], const unsigned int lineno, const unsigned int fileno);
 
-    bool simplifyConditions();
+    bool simplifyConditions();
+
+    bool simplifyCasts();
 
     TOKEN *_gettok(TOKEN *tok, int index);