[Bug 19317] Enemy Nations: "Error 2 loading the game"

http://bugs.winehq.org/show_bug.cgi?id=19317

--- Comment #6 from Joel Parker   2009-08-18 21:50:18 ---
Here's my interpretation of what's failing:

1. mmioOpen opens file ENATIONS.DAT (RIFF file)

2. mmioDescend searches for 'RIFF' from beginning of file

3. finds WSDF (first chunk) of size 0x184; skips to 0x0 (file beg.) + 0x8
(const offset) + 0x184 (chunk size) -> next word aligned = 0x18C

4. finds RIFF of size 0x5E; skips to 0x18C + 0x8 + 0x5E -> next word aligned =
0x1F2

5. doesn't find anything at 0x1F2 and craps out (the actual next RIFF chunk is
at 0x1F4)

The RIFF chunk size at step 4 appears to be wrong in the file; the length is
actually 0x60, not 0x5E.

What's Microsoft's mmioRead doing to get around this?