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Fix os.read for windows

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This commit is contained in:
gingerBill
2020-03-12 23:22:01 +00:00
parent a9bc07dbff
commit 6abc93ad84
1 changed files with 14 additions and 12 deletions
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core/os/os_windows.odin
+14 -12
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@@ -145,21 +145,23 @@ write :: proc(fd: Handle, data: []byte) -> (int, Errno) {
read :: proc(fd: Handle, data: []byte) -> (int, Errno) { read :: proc(fd: Handle, data: []byte) -> (int, Errno) {
if len(data) == 0 do return 0, ERROR_NONE; if len(data) == 0 do return 0, ERROR_NONE;
read := 0; single_read_length: u32;
for { total_read: i64;
to_read := u32(min(1<<29-1, len(data)-read)); length := i64(len(data));
if to_read <= 0 do break;
n: u32; for total_read < length {
ok := win32.read_file(win32.Handle(fd), &data[to_read], to_read, &n, nil); remaining := length - total_read;
if !ok { MAX :: 1<<31-1;
return int(read), Errno(win32.get_last_error()); to_read: u32 = min(u32(remaining), MAX);
e := win32.read_file(win32.Handle(fd), &data[total_read], to_read, &single_read_length, nil);
if !e {
err := Errno(win32.get_last_error());
return int(total_read), err;
} }
total_read += i64(single_read_length);
read += int(n);
} }
return int(total_read), ERROR_NONE;
return int(read), ERROR_NONE;
} }
seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) { seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {