mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2026-02-12 20:37:54 +00:00
Code Issues Packages Projects Releases Wiki Activity

wasi: Implement read and write with err checking

Browse Source
This commit is contained in:
Shritesh Bhattarai 2019-05-03 13:04:27 -05:00 committed by Andrew Kelley
parent 2f3b461703
commit f4798297de
1 changed files with 24 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
std/os/wasi.zig
View File

@ -4,7 +4,6 @@ pub const STDIN_FILENO = 0;
pub const STDOUT_FILENO = 1;
pub const STDERR_FILENO = 2;
// TODO: implement this like darwin does
pub fn getErrno(r: usize) usize {
const signed_r = @bitCast(isize, r);
return if (signed_r > -4096 and signed_r < 0) @intCast(usize, -signed_r) else 0;
@ -13,11 +12,31 @@ pub fn getErrno(r: usize) usize {
pub fn write(fd: i32, buf: [*]const u8, count: usize) usize {
var nwritten: usize = undefined;
const iovs = []ciovec_t{ciovec_t{
const ciovs = ciovec_t{
.buf = buf,
.buf_len = count,
}};
};
_ = fd_write(@bitCast(fd_t, isize(fd)), &iovs[0], iovs.len, &nwritten);
return nwritten;
const err = fd_write(@bitCast(fd_t, isize(fd)), &ciovs, 1, &nwritten);
if (err == ESUCCESS) {
return nwritten;
} else {
return @bitCast(usize, -isize(err));
}
}
pub fn read(fd: i32, buf: [*]u8, nbyte: usize) usize {
var nread: usize = undefined;
const iovs = iovec_t{
.buf = buf,
.buf_len = nbyte,
};
const err = fd_read(@bitCast(fd_t, isize(fd)), &iovs, 1, &nread);
if (err == ESUCCESS) {
return nread;
} else {
return @bitCast(usize, -isize(err));
}
}