1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
const std = @import("../std.zig");
const assert = std.debug.assert;
const mem = std.mem;
context: *const anyopaque,
writeFn: *const fn (context: *const anyopaque, bytes: []const u8) anyerror!usize,
const Self = @This();
pub const Error = anyerror;
pub fn write(self: Self, bytes: []const u8) anyerror!usize {
return self.writeFn(self.context, bytes);
}
pub fn writeAll(self: Self, bytes: []const u8) anyerror!void {
var index: usize = 0;
while (index != bytes.len) {
index += try self.write(bytes[index..]);
}
}
pub fn print(self: Self, comptime format: []const u8, args: anytype) anyerror!void {
return std.fmt.format(self, format, args);
}
pub fn writeByte(self: Self, byte: u8) anyerror!void {
const array = [1]u8{byte};
return self.writeAll(&array);
}
pub fn writeByteNTimes(self: Self, byte: u8, n: usize) anyerror!void {
var bytes: [256]u8 = undefined;
@memset(bytes[0..], byte);
var remaining: usize = n;
while (remaining > 0) {
const to_write = @min(remaining, bytes.len);
try self.writeAll(bytes[0..to_write]);
remaining -= to_write;
}
}
pub fn writeBytesNTimes(self: Self, bytes: []const u8, n: usize) anyerror!void {
var i: usize = 0;
while (i < n) : (i += 1) {
try self.writeAll(bytes);
}
}
pub inline fn writeInt(self: Self, comptime T: type, value: T, endian: std.builtin.Endian) anyerror!void {
var bytes: [@divExact(@typeInfo(T).Int.bits, 8)]u8 = undefined;
mem.writeInt(std.math.ByteAlignedInt(@TypeOf(value)), &bytes, value, endian);
return self.writeAll(&bytes);
}
pub fn writeStruct(self: Self, value: anytype) anyerror!void {
// Only extern and packed structs have defined in-memory layout.
comptime assert(@typeInfo(@TypeOf(value)).Struct.layout != .auto);
return self.writeAll(mem.asBytes(&value));
}
pub fn writeFile(self: Self, file: std.fs.File) anyerror!void {
// TODO: figure out how to adjust std lib abstractions so that this ends up
// doing sendfile or maybe even copy_file_range under the right conditions.
var buf: [4000]u8 = undefined;
while (true) {
const n = try file.readAll(&buf);
try self.writeAll(buf[0..n]);
if (n < buf.len) return;
}
}
|
