Simple fix for #635 (preprocessor: remove 'asm(...)')

src/preprocessor.cpp

@@ -433,6 +433,40 @@ std::string Preprocessor::removeComments(const std::string &str)
     return code.str();
 }
 
+void Preprocessor::removeAsm(std::string &str)
+{
+    std::string::size_type pos = 0;
+    while ((pos = str.find("\nasm(", pos)) != std::string::npos)
+    {
+        unsigned int newlines = 0;
+        std::string::size_type pos2 = pos + 5;
+        while (pos2 < str.length() && str[pos2] != ')')
+        {
+            if (str[pos2] == '\n')
+                ++newlines;
+            ++pos2;
+        }
+        str.erase(pos + 1, pos2 - pos);
+        str.insert(pos, std::string(newlines, '\n'));
+    }
+
+    pos = 0;
+    while ((pos = str.find("\nasm __volatile(", pos)) != std::string::npos)
+    {
+        unsigned int newlines = 0;
+        std::string::size_type pos2 = pos + 5;
+        while (pos2 < str.length() && str[pos2] != ')')
+        {
+            if (str[pos2] == '\n')
+                ++newlines;
+            ++pos2;
+        }
+        str.erase(pos + 1, pos2 - pos);
+        str.insert(pos, std::string(newlines, '\n'));
+    }
+}
+
+
 void Preprocessor::preprocess(std::istream &istr, std::map<std::string, std::string> &result, const std::string &filename, const std::list<std::string> &includePaths)
 {
     std::list<std::string> configs;
@@ -518,6 +552,9 @@ void Preprocessor::preprocess(std::istream &istr, std::string &processedFile, st
     // Remove space characters that are after or before new line character
     processedFile = removeSpaceNearNL(processedFile);
 
+    // Remove asm(...)
+    removeAsm(processedFile);
+
     // Replace "defined A" with "defined(A)"
     {
         std::istringstream istr(processedFile.c_str());

src/preprocessor.h

@@ -126,6 +126,13 @@ private:
     static std::string getdef(std::string line, bool def);
 
 public:
+
+    /**
+     * Remove asm(...) from a string
+     * @param str Code
+     */
+    static void removeAsm(std::string &str);
+
     /**
      * Evaluate condition 'numerically'
      * @param cfg configuration

test/testpreprocessor.cpp

@@ -101,6 +101,8 @@ private:
         TEST_CASE(multiline4);
         TEST_CASE(multiline5);
 
+        TEST_CASE(remove_asm);
+
         TEST_CASE(if_defined);      // "#if defined(AAA)" => "#ifdef AAA"
         TEST_CASE(if_not_defined);  // "#if !defined(AAA)" => "#ifndef AAA"
 
@@ -762,6 +764,17 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void remove_asm()
+    {
+        std::string str1("\nasm(\n\n\n);");
+        Preprocessor::removeAsm(str1);
+        ASSERT_EQUALS("\n\n\n\n;", str1);
+
+        std::string str2("\nasm __volatile(\n\n\n);");
+        Preprocessor::removeAsm(str2);
+        ASSERT_EQUALS("\n\n\n\n;", str2);
+    }
+
     void if_defined()
     {
         const char filedata[] = "#if defined(AAA)\n"