std.os.readv: Add missing iov_count declaration

2020-04-18 05:49:38 -06:00 · 2020-04-18 05:49:38 -06:00 · 344f4d9bc5
commit 344f4d9bc5
parent 986aa42d3e
1 changed files with 2 additions and 1 deletions
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@ -370,7 +370,8 @@ pub fn readv(fd: fd_t, iov: []const iovec) ReadError!usize {
        const first = iov[0];
        return read(fd, first.iov_base[0..first.iov_len]);
    }
-
+    
+    const iov_count = math.cast(u31, iov.len) catch math.maxInt(u31);
    while (true) {
        // TODO handle the case when iov_len is too large and get rid of this @intCast
        const rc = system.readv(fd, iov.ptr, iov_count);