zig/lib/std/os/uefi.zig
Andrew Kelley d29871977f remove redundant license headers from zig standard library
We already have a LICENSE file that covers the Zig Standard Library. We
no longer need to remind everyone that the license is MIT in every single
file.

Previously this was introduced to clarify the situation for a fork of
Zig that made Zig's LICENSE file harder to find, and replaced it with
their own license that required annual payments to their company.
However that fork now appears to be dead. So there is no need to
reinforce the copyright notice in every single file.
2021-08-24 12:25:09 -07:00

119 lines
3.2 KiB
Zig

const std = @import("../std.zig");
/// A protocol is an interface identified by a GUID.
pub const protocols = @import("uefi/protocols.zig");
/// Status codes returned by EFI interfaces
pub const Status = @import("uefi/status.zig").Status;
pub const tables = @import("uefi/tables.zig");
/// The EFI image's handle that is passed to its entry point.
pub var handle: Handle = undefined;
/// A pointer to the EFI System Table that is passed to the EFI image's entry point.
pub var system_table: *tables.SystemTable = undefined;
/// A handle to an event structure.
pub const Event = *opaque {};
/// GUIDs must be align(8)
pub const Guid = extern struct {
time_low: u32,
time_mid: u16,
time_high_and_version: u16,
clock_seq_high_and_reserved: u8,
clock_seq_low: u8,
node: [6]u8,
/// Format GUID into hexadecimal lowercase xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx format
pub fn format(
self: @This(),
comptime f: []const u8,
options: std.fmt.FormatOptions,
writer: anytype,
) !void {
_ = options;
if (f.len == 0) {
return std.fmt.format(writer, "{x:0>8}-{x:0>4}-{x:0>4}-{x:0>2}{x:0>2}-{x:0>12}", .{
self.time_low,
self.time_mid,
self.time_high_and_version,
self.clock_seq_high_and_reserved,
self.clock_seq_low,
self.node,
});
} else {
@compileError("Unknown format character: '" ++ f ++ "'");
}
}
pub fn eql(a: std.os.uefi.Guid, b: std.os.uefi.Guid) bool {
return a.time_low == b.time_low and
a.time_mid == b.time_mid and
a.time_high_and_version == b.time_high_and_version and
a.clock_seq_high_and_reserved == b.clock_seq_high_and_reserved and
a.clock_seq_low == b.clock_seq_low and
std.mem.eql(u8, &a.node, &b.node);
}
};
/// An EFI Handle represents a collection of related interfaces.
pub const Handle = *opaque {};
/// This structure represents time information.
pub const Time = extern struct {
/// 1900 - 9999
year: u16,
/// 1 - 12
month: u8,
/// 1 - 31
day: u8,
/// 0 - 23
hour: u8,
/// 0 - 59
minute: u8,
/// 0 - 59
second: u8,
_pad1: u8,
/// 0 - 999999999
nanosecond: u32,
/// The time's offset in minutes from UTC.
/// Allowed values are -1440 to 1440 or unspecified_timezone
timezone: i16,
daylight: packed struct {
_pad1: u6,
/// If true, the time has been adjusted for daylight savings time.
in_daylight: bool,
/// If true, the time is affected by daylight savings time.
adjust_daylight: bool,
},
_pad2: u8,
/// Time is to be interpreted as local time
pub const unspecified_timezone: i16 = 0x7ff;
};
/// Capabilities of the clock device
pub const TimeCapabilities = extern struct {
/// Resolution in Hz
resolution: u32,
/// Accuracy in an error rate of 1e-6 parts per million.
accuracy: u32,
/// If true, a time set operation clears the device's time below the resolution level.
sets_to_zero: bool,
};
/// File Handle as specified in the EFI Shell Spec
pub const FileHandle = *opaque {};