Added a test case and fixed bug. If #include was inside a string, cppcheck hanged in preprocessor.

src/preprocessor.cpp

@@ -473,7 +473,10 @@ std::string Preprocessor::handleIncludes(std::string code)
     {
         // Accept only includes that are at the start of a line
         if (pos > 0 && code[pos-1] != '\n')
+        {
+            pos += 8; // length of "#include"
             continue;
+        }
 
         std::string::size_type end = code.find("\n", pos);
         std::string filename = code.substr(pos, end - pos);

test/testpreprocessor.cpp

@@ -78,6 +78,7 @@ private:
         TEST_CASE(string1);
         TEST_CASE(string2);
         TEST_CASE(preprocessor_undef);
+        TEST_CASE(preprocessor_include_in_str);
     }
 
 
@@ -521,6 +522,25 @@ private:
         // Compare results..
         ASSERT_EQUALS("\n\n\nchar b=0;\n", Preprocessor::expandMacros(filedata));
     }
+
+    void preprocessor_include_in_str()
+    {
+        const char filedata[] = "int main()\n"
+                                "{\n"
+                                "const char *a = \"#include <string>\n\";\n"
+                                "return 0;\n"
+                                "}\n";
+
+        // Preprocess => actual result..
+        std::istringstream istr(filedata);
+        std::map<std::string, std::string> actual;
+        Preprocessor preprocessor;
+        preprocessor.preprocess(istr, actual);
+
+        // Compare results..
+        ASSERT_EQUALS(1, actual.size());
+        ASSERT_EQUALS("int main()\n{\nconst char *a = \"#include <string>\n\";\nreturn 0;\n}\n", actual[""]);
+    }
 };
 
 REGISTER_TEST(TestPreprocessor)