// Test von exceptions in gemischten C/D Projekten
// test of exceptions in mixed C/D projects


extern (C)
{
    int printf(in char*, ...);
    void* malloc(size_t);
    void  free(void*);
}

class DCException : Exception
{
    this(string msg)
    {
        super(msg);
    }
}

class Stream
{
public:

    new(uint size)
    {
        void* p = malloc(size);
        return p;
    }

    delete(void* p)
    {
        free(p);
    }

    void print(int fromc)
    {
        printf("Data from clib: %d\n", fromc);
    }

}


// implementiert in cexept.c
// implemented in cexept.c
extern (C)
{
    void doCstuff(int param);
    void setReader(void* r, void (*fn)(int rparam));
    void* getReader();
    void doCRead();
}


// handler called from doCStuff
extern (C) void dhandler(int param)
{
    throw new DCException("Something went wrong");
}

void inventCstuff(int param)
{
    try
    {
        doCstuff(param);
        printf("C stuff done without problems.\n");
    }
    catch (Object o)
    {
        printf("Exception occured: %.*s\n", o.toString);
        printf("Type of exception: %.*s\n", o.classinfo.name);
    }
}

// reader callback, called from doCRead
extern (C) void readCB(int rparam)
{
    Stream s = cast(Stream)getReader();
    if (s) s.print(rparam);
}


void main()
{
    int param = 100;

    printf("param is %d\n", param);
    inventCstuff(param);

    param = 13;
    printf("param is now %d\nShould crash!\n", param);
    inventCstuff(param);

    Stream s = new Stream;
    setReader(cast(void*)s, &readCB);
    for (int i = 0; i < 5; i++) doCRead();
    delete s;

}