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Updates for zig iopocolypse #44

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7941805
updates to work with new std.Io
elerch Nov 6, 2025
e6159b4
update writer parameter to use std.Io.Writer
elerch Nov 6, 2025
8190461
update README to include io in the creation of an instant
elerch Nov 6, 2025
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11 changes: 8 additions & 3 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -15,8 +15,13 @@ pub fn main() void {
var env = try std.process.getEnvMap(allocator);
defer env.deinit();

// Get an instant in time. The default gets "now" in UTC
const now = try zeit.instant(.{});
var threaded: std.Io.Threaded = .init_single_threaded;
var io = threaded.io();
defer io.deinit();

// Get an instant in time. The default gets "now" in UTC,
// and requires io to read from the system clock
const now = try zeit.instant(.{ .io = io });

// Load our local timezone. This needs an allocator. Optionally pass in a
// *const std.process.EnvMap to support TZ and TZDIR environment variables
Expand Down Expand Up @@ -56,7 +61,7 @@ pub fn main() void {
const vienna = try zeit.loadTimeZone(alloc, .@"Europe/Vienna", &env);
defer vienna.deinit();

// Parse an Instant from an ISO8601 or RFC3339 string
// Parse an Instant from an ISO8601 or RFC3339 string. io is not needed
const iso = try zeit.instant(.{
.source = .{
.iso8601 = "2024-03-16T08:38:29.496-1200",
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4 changes: 2 additions & 2 deletions src/timezone.zig
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Expand Up @@ -522,7 +522,7 @@ pub const TZInfo = struct {
},
};

pub fn parse(allocator: std.mem.Allocator, reader: *std.io.Reader) !TZInfo {
pub fn parse(allocator: std.mem.Allocator, reader: *std.Io.Reader) !TZInfo {
var legacy_header = try reader.takeStruct(Header, .big); // handles endianness for us
if (!std.mem.eql(u8, &legacy_header.magic, "TZif")) return error.BadHeader;
if (legacy_header.version != 0 and legacy_header.version != '2' and legacy_header.version != '3') return error.BadVersion;
Expand All @@ -545,7 +545,7 @@ pub const TZInfo = struct {
}
}

fn parseBlock(allocator: std.mem.Allocator, reader: *std.io.Reader, header: Header, legacy: bool) !TZInfo {
fn parseBlock(allocator: std.mem.Allocator, reader: *std.Io.Reader, header: Header, legacy: bool) !TZInfo {
if (header.counts.isstdcnt != 0 and header.counts.isstdcnt != header.counts.typecnt) return error.Malformed; // rfc8536: isstdcnt [...] MUST either be zero or equal to "typecnt"
if (header.counts.isutcnt != 0 and header.counts.isutcnt != header.counts.typecnt) return error.Malformed; // rfc8536: isutcnt [...] MUST either be zero or equal to "typecnt"
if (header.counts.typecnt == 0) return error.Malformed; // rfc8536: typecnt [...] MUST NOT be zero
Expand Down
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