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Implemented windows versions of seekTo and getPos

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This commit is contained in:
Jimmi Holst Christensen 2018-01-19 21:30:57 +01:00
parent 0aae96b5f0
commit 90714a3831
2 changed files with 38 additions and 0 deletions
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30
std/io.zig
View File

@ -204,6 +204,15 @@ pub const File = struct {
};
}
},
Os.windows => {
if (system.SetFilePointerEx(self.handle, amount, null, system.FILE_CURRENT) == 0) {
const err = system.GetLastError();
return switch (err) {
system.ERROR.INVALID_PARAMETER => error.BadFd,
else => os.unexpectedErrorPosix(err),
};
}
},
else => @compileError("unsupported OS"),
}
}
@ -224,6 +233,15 @@ pub const File = struct {
};
}
},
Os.windows => {
if (system.SetFilePointerEx(self.handle, @bitCast(isize, pos), null, system.FILE_BEGIN) == 0) {
const err = system.GetLastError();
return switch (err) {
system.ERROR.INVALID_PARAMETER => error.BadFd,
else => os.unexpectedErrorWindows(err),
};
}
},
else => @compileError("unsupported OS: " ++ @tagName(builtin.os)),
}
}
@ -245,6 +263,18 @@ pub const File = struct {
}
return result;
},
Os.windows => {
var pos : usize = undefined;
if (system.SetFilePointerEx(self.handle, 0, @ptrCast(system.PLARGE_INTEGER, &pos), system.FILE_CURRENT) == 0) {
const err = system.GetLastError();
return switch (err) {
system.ERROR.INVALID_PARAMETER => error.BadFd,
else => os.unexpectedErrorWindows(err),
};
}
return pos;
},
else => @compileError("unsupported OS"),
}
}

8
std/os/windows/index.zig
View File

@ -74,6 +74,9 @@ pub extern "kernel32" stdcallcc fn ReadFile(in_hFile: HANDLE, out_lpBuffer: LPVO
in_nNumberOfBytesToRead: DWORD, out_lpNumberOfBytesRead: &DWORD,
in_out_lpOverlapped: ?&OVERLAPPED) -> BOOL;
pub extern "kernel32" stdcallcc fn SetFilePointerEx(in_fFile: HANDLE, in_liDistanceToMove: LARGE_INTEGER,
out_opt_ldNewFilePointer: ?PLARGE_INTEGER, in_dwMoveMethod: DWORD) -> BOOL;
pub extern "kernel32" stdcallcc fn SetHandleInformation(hObject: HANDLE, dwMask: DWORD, dwFlags: DWORD) -> BOOL;
pub extern "kernel32" stdcallcc fn Sleep(dwMilliseconds: DWORD);
@ -126,6 +129,7 @@ pub const UNICODE = false;
pub const WCHAR = u16;
pub const WORD = u16;
pub const LARGE_INTEGER = i64;
pub const PLARGE_INTEGER = &LARGE_INTEGER;
pub const TRUE = 1;
pub const FALSE = 0;
@ -289,3 +293,7 @@ pub const MOVEFILE_DELAY_UNTIL_REBOOT = 4;
pub const MOVEFILE_FAIL_IF_NOT_TRACKABLE = 32;
pub const MOVEFILE_REPLACE_EXISTING = 1;
pub const MOVEFILE_WRITE_THROUGH = 8;
pub const FILE_BEGIN = 0;
pub const FILE_CURRENT = 1;
pub const FILE_END = 2;