mirror of
https://github.com/ziglang/zig.git
synced 2025-12-22 06:03:16 +00:00
a98fa56ae9
The primary purpose of this change is to eliminate one usage of `usingnamespace` in the standard library - specifically the usage for errno values in `std.os.linux`. This is accomplished by truncating the `E` prefix from error values, and making errno a proper enum. A similar strategy can be used to eliminate some other `usingnamespace` sites in the std lib.
50 lines
1.8 KiB
Zig
50 lines
1.8 KiB
Zig
// SPDX-License-Identifier: MIT
|
|
// Copyright (c) 2015-2021 Zig Contributors
|
|
// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
|
|
// The MIT license requires this copyright notice to be included in all copies
|
|
// and substantial portions of the software.
|
|
const std = @import("../std.zig");
|
|
const builtin = std.builtin;
|
|
const io = std.io;
|
|
const testing = std.testing;
|
|
|
|
pub const CWriter = io.Writer(*std.c.FILE, std.fs.File.WriteError, cWriterWrite);
|
|
|
|
pub fn cWriter(c_file: *std.c.FILE) CWriter {
|
|
return .{ .context = c_file };
|
|
}
|
|
|
|
fn cWriterWrite(c_file: *std.c.FILE, bytes: []const u8) std.fs.File.WriteError!usize {
|
|
const amt_written = std.c.fwrite(bytes.ptr, 1, bytes.len, c_file);
|
|
if (amt_written >= 0) return amt_written;
|
|
switch (@intToEnum(os.E, std.c._errno().*)) {
|
|
.SUCCESS => unreachable,
|
|
.INVAL => unreachable,
|
|
.FAULT => unreachable,
|
|
.AGAIN => unreachable, // this is a blocking API
|
|
.BADF => unreachable, // always a race condition
|
|
.DESTADDRREQ => unreachable, // connect was never called
|
|
.DQUOT => return error.DiskQuota,
|
|
.FBIG => return error.FileTooBig,
|
|
.IO => return error.InputOutput,
|
|
.NOSPC => return error.NoSpaceLeft,
|
|
.PERM => return error.AccessDenied,
|
|
.PIPE => return error.BrokenPipe,
|
|
else => |err| return os.unexpectedErrno(err),
|
|
}
|
|
}
|
|
|
|
test {
|
|
if (!builtin.link_libc or builtin.os.tag == .wasi) return error.SkipZigTest;
|
|
|
|
const filename = "tmp_io_test_file.txt";
|
|
const out_file = std.c.fopen(filename, "w") orelse return error.UnableToOpenTestFile;
|
|
defer {
|
|
_ = std.c.fclose(out_file);
|
|
std.fs.cwd().deleteFileZ(filename) catch {};
|
|
}
|
|
|
|
const writer = cWriter(out_file);
|
|
try writer.print("hi: {}\n", .{@as(i32, 123)});
|
|
}
|