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33 /* Replacement for pread for platforms which lack this function. */
48 /* Replacement pread for Win32. */
50 #include "nbdkit-plugin.h"
54 pread (int fd
, void *buf
, size_t count
, off_t offset
)
60 memset (&ovl
, 0, sizeof ovl
);
61 /* Seriously WTF Windows? */
62 ovl
.Offset
= offset
& 0xffffffff;
63 ovl
.OffsetHigh
= offset
>> 32;
65 h
= (HANDLE
) _get_osfhandle (fd
);
66 if (h
== INVALID_HANDLE_VALUE
) {
67 nbdkit_debug ("ReadFile: bad handle");
72 /* XXX Will fail weirdly if count is larger than 32 bits. */
73 if (!ReadFile (h
, buf
, count
, &r
, &ovl
)) {
74 if (GetLastError () == ERROR_HANDLE_EOF
)
76 nbdkit_debug ("ReadFile: error %d", GetLastError ());
85 #error "no replacement pread is available on this platform"
88 #endif /* !HAVE_PREAD */