Error - void* - unknown size

Question

This function which I received from a third party contains the following code which does not compile in MS Visual Studio 10. I think there is a casting problem but do not know how to fix this. ``` void dump_ffmpeg_pad16(FILE *stream, uint32_t timestamp, void *data, int data_size) { unsigned int z=0; void *end = data + data_size; while (data < end) { z = *(unsigned short*)data; fwrite(((char*)(&z)), 3, 1, stream); data += 2; } } ``` It has been instructed in their help to compile as C++ code. Thanks for your help.

Accepted Answer

```
void *end = data + data_size;
```

Should be:

```
void *end = ((char *) data) + data_size;
```

Adding to a `void*` is a GCC extension.

Error - void* - unknown size

Solution

Problem