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Fix compilation errors in I/O module

This commit is contained in:
kayomn 2022-10-03 22:50:28 +01:00
parent 774536fd58
commit e01b19cd68
1 changed files with 39 additions and 36 deletions
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75
src/io.zig
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@ -10,7 +10,7 @@ pub const Writer = struct {
writeContext: fn (*anyopaque, []const u8) usize,
///
///
/// Radices supported by [writeInt].
///
pub const Radix = enum {
binary,
@ -79,39 +79,45 @@ pub const Writer = struct {
const Int = @TypeOf(value);
const type_info = @typeInfo(Int);
if (type_info != .Int) @compileError("value must be of type int");
switch (type_info) {
.Int => {
if (value == 0) return writer.writeByte('0');
if (value == 0) return writer.writeByte('0');
// TODO: Unhardcode this as it will break with large ints.
var buffer = std.mem.zeroes([28]u8);
var buffer_count = @as(usize, 0);
var n1 = value;
// TODO: Unhardcode this as it will break with large ints.
var buffer = std.mem.zeroes([28]u8);
var buffer_count = @as(usize, 0);
var n1 = value;
if ((type_info.Int.signedness == .signed) and (value < 0)) {
// Negative value.
n1 = -value;
buffer[0] = '-';
buffer_count += 1;
}
if ((type_info.Int.signedness == .signed) and (value < 0)) {
// Negative value.
n1 = -value;
buffer[0] = '-';
buffer_count += 1;
while (n1 != 0) {
const base = @enumToInt(radix);
buffer[buffer_count] = @intCast(u8, (n1 % base) + '0');
n1 = (n1 / base);
buffer_count += 1;
}
for (buffer[0 .. (buffer_count / 2)]) |_, i|
std.mem.swap(u8, &buffer[i], &buffer[buffer_count - i - 1]);
return (writer.write(buffer[0 .. buffer_count]) == buffer_count);
},
// Cast comptime int into known-size integer and try again.
.ComptimeInt => return writer.
writeInt(radix, @intCast(std.math.IntFittingRange(value, value), value)),
else => @compileError("value must be of type int"),
}
while (n1 != 0) {
const base = @enumToInt(radix);
buffer[buffer_count] = @intCast(u8, (n1 % base) + '0');
n1 = (n1 / base);
buffer_count += 1;
}
for (buffer[0 .. (buffer_count / 2)]) |_, i|
std.mem.swap(u8, &buffer[i], &buffer[buffer_count - i - 1]);
return (writer.write(buffer[0 .. buffer_count]) == buffer_count);
}
};
var null_context = @as(usize, 0);
///
/// Writer that silently throws consumed data away and never fails.
///
@ -119,13 +125,10 @@ var null_context = @as(usize, 0);
/// sent somewhere for whatever reason.
///
pub const null_writer = Writer{
.context = (&null_context),
.operation = struct {
fn write(context: *anyopaque, buffer: []const u8) usize {
// Validate context canary value.
std.debug.assert(@ptrCast(*usize, @alignCast(@alignOf(usize), context)).* == 0);
.context = undefined,
.writeContext = struct {
fn write(_: *anyopaque, buffer: []const u8) usize {
return buffer.len;
}
}.write,
@ -137,9 +140,9 @@ test {
{
const sequence = "foo";
testing.expectEqual(null_writer.write(sequence), sequence.len);
try testing.expectEqual(null_writer.write(sequence), sequence.len);
}
testing.expect(null_writer.writeByte(0));
testing.expect(null_writer.writeInt(.decimal, 420));
try testing.expect(null_writer.writeByte(0));
try testing.expect(null_writer.writeInt(.decimal, 420));
}