[Bug 6525] New: Microchip C18 compiler, fread bug?

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=6525

Summary: Microchip C18 compiler, fread bug?
           Product: Wine
           Version: 0.9.23.
          Platform: PC
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-msvcrt
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Microchip's C18 compiler (v2.40) no longer works under wine. More specifically,
when I try to compile with it, it fails claiming the code has an error on line 
0 (btw, line numbering starts at 1).

I used git and found that a change to 'fread' in dlls/msvcrt/file.c back in 
july was the culprit. In that patch, 'fread' was changed to use a 'while' 
loop containing a '_read(file->_file,ptr, rcnt);'. Basically, 'ptr' (the 
destination for the data) isn't getting updated in between successive '_read's.

In the latest source (that I've seen) this bug has mulitplied with the addition
of a 'memcpy(ptr, file->_ptr, i);' in the same loop.

A couple well-placed 'if( i > 0 ) ptr = (char*)ptr + i;' should fix this.