Wrap sound stuff

See #17, #24

src/platform_compat.cc

@@ -101,6 +101,26 @@ void compat_makepath(char* path, const char* drive, const char* dir, const char*
 #endif
 }
 
+int compat_read(int fileHandle, void* buf, unsigned int size)
+{
+    return read(fileHandle, buf, size);
+}
+
+int compat_write(int fileHandle, const void* buf, unsigned int size)
+{
+    return write(fileHandle, buf, size);
+}
+
+long compat_lseek(int fileHandle, long offset, int origin)
+{
+    return lseek(fileHandle, offset, origin);
+}
+
+long compat_tell(int fd)
+{
+    return lseek(fd, 0, SEEK_CUR);
+}
+
 long compat_filelength(int fd)
 {
     long originalOffset = lseek(fd, 0, SEEK_CUR);

src/platform_compat.h

@@ -24,6 +24,10 @@ char* compat_strlwr(char* string);
 char* compat_itoa(int value, char* buffer, int radix);
 void compat_splitpath(const char* path, char* drive, char* dir, char* fname, char* ext);
 void compat_makepath(char* path, const char* drive, const char* dir, const char* fname, const char* ext);
+int compat_read(int fileHandle, void* buf, unsigned int size);
+int compat_write(int fileHandle, const void* buf, unsigned int size);
+long compat_lseek(int fileHandle, long offset, int origin);
+long compat_tell(int fileHandle);
 long compat_filelength(int fd);
 int compat_mkdir(const char* path);
 unsigned int compat_timeGetTime();

src/sound.cc

@@ -4,10 +4,17 @@
 #include "memory.h"
 #include "platform_compat.h"
 
+#ifdef _WIN32
 #include <io.h>
+#else
+#include <fcntl.h>
+#include <unistd.h>
+#endif
 #include <limits.h>
 #include <math.h>
+#ifdef HAVE_DSOUND
 #include <mmsystem.h>
+#endif
 #include <stdlib.h>
 #include <string.h>
 
@@ -35,10 +42,10 @@ FreeProc* gSoundFreeProc = soundFreeProcDefaultImpl;
 SoundFileIO gSoundDefaultFileIO = {
     open,
     close,
-    read,
+    compat_read,
-    write,
+    compat_write,
-    lseek,
+    compat_lseek,
-    tell,
+    compat_tell,
     compat_filelength,
     -1,
 };
@@ -1718,10 +1725,12 @@ void _fadeSounds()
         }
     }
 
+#ifdef HAVE_DSOUND
     if (_fadeHead == NULL && _fadeEventHandle != -1) {
         timeKillEvent(_fadeEventHandle);
         _fadeEventHandle = -1;
     }
+#endif
 }
 
 // 0x4AE988