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add windows implementation of io.File.getEndPos

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This commit is contained in:
Andrew Kelley 2017-11-10 14:36:03 -05:00
parent 1ac46fac15
commit 20c2dbdbd3
2 changed files with 25 additions and 9 deletions
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31
std/io.zig
View File

@ -253,17 +253,30 @@ pub const File = struct {
}
pub fn getEndPos(self: &File) -> %usize {
var stat: system.Stat = undefined;
const err = system.getErrno(system.fstat(self.handle, &stat));
if (err > 0) {
return switch (err) {
system.EBADF => error.BadFd,
system.ENOMEM => error.OutOfMemory,
else => os.unexpectedErrorPosix(err),
if (is_posix) {
var stat: system.Stat = undefined;
const err = system.getErrno(system.fstat(self.handle, &stat));
if (err > 0) {
return switch (err) {
system.EBADF => error.BadFd,
system.ENOMEM => error.OutOfMemory,
else => os.unexpectedErrorPosix(err),
}
}
}
return usize(stat.size);
return usize(stat.size);
} else if (is_windows) {
var file_size: system.LARGE_INTEGER = undefined;
if (system.GetFileSizeEx(self.handle, &file_size) == 0) {
const err = system.GetLastError();
return switch (err) {
else => os.unexpectedErrorWindows(err),
};
}
return @bitCast(usize, file_size);
} else {
unreachable;
}
}
pub fn read(self: &File, buffer: []u8) -> %usize {

3
std/os/windows/index.zig
View File

@ -46,6 +46,8 @@ pub extern "kernel32" stdcallcc fn GetEnvironmentVariableA(lpName: LPCSTR, lpBuf
pub extern "kernel32" stdcallcc fn GetExitCodeProcess(hProcess: HANDLE, lpExitCode: &DWORD) -> BOOL;
pub extern "kernel32" stdcallcc fn GetFileSizeEx(hFile: HANDLE, lpFileSize: &LARGE_INTEGER) -> BOOL;
pub extern "kernel32" stdcallcc fn GetLastError() -> DWORD;
pub extern "kernel32" stdcallcc fn GetFileInformationByHandleEx(in_hFile: HANDLE,
@ -115,6 +117,7 @@ pub const ULONG_PTR = usize;
pub const UNICODE = false;
pub const WCHAR = u16;
pub const WORD = u16;
pub const LARGE_INTEGER = i64;
pub const TRUE = 1;
pub const FALSE = 0;