code | Jason De Arte

Tag Archives: code

2012.Apr.06

I know people bag on c++ (for many valid reasons) but it still amazes me to learn something new: read only members using const references. It’s even better when a c++ non-fan teaches you about it. Thanks Nico!

class Test
{
public:
  Test() : readOnlyVersion(m_writableVersion)
  {}
  const SomeType & readOnlyVersion;
private:
  SomeType m_writableVersion;
};

Never having a need, I had always filtered out reference data members – I just categorized them with static members and their special initialization. Now that I see a use case, I’m basking in the “Ah that makes total sense” moment.

Testing a C/C++ plugin to do syntax highlighting

2012.Mar.27

Got a new wordpress plugin from http://alexgorbatchev.com/SyntaxHighlighter/, let’s see how it works, by drawing on a recent facepalm bug that existed for many years in the codebase..

// abstacted to protect authors of 15 year old code that didn't have access to a 64bit dev environment#ifdef linux
struct SomePThreadContainer {
    pthread_mutex_t mutex;
    int other_data[32];
};
#define ODD_DATA_SIZE sizeof(SomePThreadContainer)
#else
#define ODD_DATA_SIZE sizeof(HANDLE)
#endif
class OddWrapper {
    byte m_oddAbsraction[ODD_DATA_SIZE];
public:
    void DoStuff();
};
class OddContainer {
    OddWrapper oddOne;
    bool b1;
    OddWrapper oddTwo;
public:
    void VerifyOneWorksOnUse();
    void VerifyTwoFailsOnUse(); // but will work if b1 is changed from a bool to an int
};

// abstacted to protect authors of 15 year old code that didn't have access to a 64bit dev environment
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22	`#ifdef linux` `struct` `SomePThreadContainer {` `pthread_mutex_t mutex;` `int` `other_data[32];` `};` `#define ODD_DATA_SIZE sizeof(SomePThreadContainer)` `#else` `#define ODD_DATA_SIZE sizeof(HANDLE)` `#endif` `class` `OddWrapper {` `byte m_oddAbsraction[ODD_DATA_SIZE];` `public:` `void` `DoStuff();` `};` `class` `OddContainer {` `OddWrapper oddOne;` `bool` `b1;` `OddWrapper oddTwo;` `public:` `void` `VerifyOneWorksOnUse();` `void` `VerifyTwoFailsOnUse();` `// but will work if b1 is changed from a bool to an int` `};`

Many bothans were NEEDLESSLY lost to bring you this bug. 🙂

Previous Page