mirror of
https://github.com/ziglang/zig.git
synced 2024-12-03 18:38:45 +00:00
f26dda2117
Most of this migration was performed automatically with `zig fmt`. There were a few exceptions which I had to manually fix: * `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten * `@truncate`'s fixup is incorrect for vectors * Test cases are not formatted, and their error locations change
2857 lines
108 KiB
Zig
2857 lines
108 KiB
Zig
const std = @import("std.zig");
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const builtin = @import("builtin");
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const io = std.io;
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const math = std.math;
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const assert = std.debug.assert;
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const mem = std.mem;
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const unicode = std.unicode;
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const meta = std.meta;
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const errol = @import("fmt/errol.zig");
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const lossyCast = std.math.lossyCast;
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const expectFmt = std.testing.expectFmt;
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pub const default_max_depth = 3;
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pub const Alignment = enum {
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left,
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center,
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right,
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};
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pub const FormatOptions = struct {
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precision: ?usize = null,
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width: ?usize = null,
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alignment: Alignment = .right,
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fill: u8 = ' ',
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};
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/// Renders fmt string with args, calling `writer` with slices of bytes.
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/// If `writer` returns an error, the error is returned from `format` and
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/// `writer` is not called again.
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///
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/// The format string must be comptime-known and may contain placeholders following
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/// this format:
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/// `{[argument][specifier]:[fill][alignment][width].[precision]}`
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///
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/// Above, each word including its surrounding [ and ] is a parameter which you have to replace with something:
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///
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/// - *argument* is either the numeric index or the field name of the argument that should be inserted
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/// - when using a field name, you are required to enclose the field name (an identifier) in square
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/// brackets, e.g. {[score]...} as opposed to the numeric index form which can be written e.g. {2...}
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/// - *specifier* is a type-dependent formatting option that determines how a type should formatted (see below)
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/// - *fill* is a single character which is used to pad the formatted text
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/// - *alignment* is one of the three characters `<`, `^`, or `>` to make the text left-, center-, or right-aligned, respectively
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/// - *width* is the total width of the field in characters
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/// - *precision* specifies how many decimals a formatted number should have
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///
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/// Note that most of the parameters are optional and may be omitted. Also you can leave out separators like `:` and `.` when
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/// all parameters after the separator are omitted.
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/// Only exception is the *fill* parameter. If *fill* is required, one has to specify *alignment* as well, as otherwise
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/// the digits after `:` is interpreted as *width*, not *fill*.
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///
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/// The *specifier* has several options for types:
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/// - `x` and `X`: output numeric value in hexadecimal notation
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/// - `s`:
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/// - for pointer-to-many and C pointers of u8, print as a C-string using zero-termination
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/// - for slices of u8, print the entire slice as a string without zero-termination
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/// - `e`: output floating point value in scientific notation
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/// - `d`: output numeric value in decimal notation
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/// - `b`: output integer value in binary notation
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/// - `o`: output integer value in octal notation
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/// - `c`: output integer as an ASCII character. Integer type must have 8 bits at max.
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/// - `u`: output integer as an UTF-8 sequence. Integer type must have 21 bits at max.
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/// - `?`: output optional value as either the unwrapped value, or `null`; may be followed by a format specifier for the underlying value.
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/// - `!`: output error union value as either the unwrapped value, or the formatted error value; may be followed by a format specifier for the underlying value.
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/// - `*`: output the address of the value instead of the value itself.
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/// - `any`: output a value of any type using its default format.
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///
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/// If a formatted user type contains a function of the type
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/// ```
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/// pub fn format(value: ?, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void
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/// ```
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/// with `?` being the type formatted, this function will be called instead of the default implementation.
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/// This allows user types to be formatted in a logical manner instead of dumping all fields of the type.
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///
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/// A user type may be a `struct`, `vector`, `union` or `enum` type.
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///
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/// To print literal curly braces, escape them by writing them twice, e.g. `{{` or `}}`.
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pub fn format(
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writer: anytype,
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comptime fmt: []const u8,
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args: anytype,
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) !void {
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const ArgsType = @TypeOf(args);
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const args_type_info = @typeInfo(ArgsType);
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if (args_type_info != .Struct) {
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@compileError("expected tuple or struct argument, found " ++ @typeName(ArgsType));
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}
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const fields_info = args_type_info.Struct.fields;
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if (fields_info.len > max_format_args) {
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@compileError("32 arguments max are supported per format call");
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}
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@setEvalBranchQuota(2000000);
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comptime var arg_state: ArgState = .{ .args_len = fields_info.len };
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comptime var i = 0;
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inline while (i < fmt.len) {
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const start_index = i;
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inline while (i < fmt.len) : (i += 1) {
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switch (fmt[i]) {
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'{', '}' => break,
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else => {},
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}
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}
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comptime var end_index = i;
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comptime var unescape_brace = false;
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// Handle {{ and }}, those are un-escaped as single braces
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if (i + 1 < fmt.len and fmt[i + 1] == fmt[i]) {
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unescape_brace = true;
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// Make the first brace part of the literal...
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end_index += 1;
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// ...and skip both
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i += 2;
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}
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// Write out the literal
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if (start_index != end_index) {
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try writer.writeAll(fmt[start_index..end_index]);
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}
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// We've already skipped the other brace, restart the loop
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if (unescape_brace) continue;
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if (i >= fmt.len) break;
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if (fmt[i] == '}') {
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@compileError("missing opening {");
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}
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// Get past the {
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comptime assert(fmt[i] == '{');
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i += 1;
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const fmt_begin = i;
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// Find the closing brace
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inline while (i < fmt.len and fmt[i] != '}') : (i += 1) {}
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const fmt_end = i;
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if (i >= fmt.len) {
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@compileError("missing closing }");
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}
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// Get past the }
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comptime assert(fmt[i] == '}');
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i += 1;
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const placeholder = comptime Placeholder.parse(fmt[fmt_begin..fmt_end].*);
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const arg_pos = comptime switch (placeholder.arg) {
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.none => null,
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.number => |pos| pos,
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.named => |arg_name| meta.fieldIndex(ArgsType, arg_name) orelse
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@compileError("no argument with name '" ++ arg_name ++ "'"),
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};
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const width = switch (placeholder.width) {
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.none => null,
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.number => |v| v,
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.named => |arg_name| blk: {
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const arg_i = comptime meta.fieldIndex(ArgsType, arg_name) orelse
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@compileError("no argument with name '" ++ arg_name ++ "'");
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_ = comptime arg_state.nextArg(arg_i) orelse @compileError("too few arguments");
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break :blk @field(args, arg_name);
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},
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};
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const precision = switch (placeholder.precision) {
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.none => null,
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.number => |v| v,
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.named => |arg_name| blk: {
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const arg_i = comptime meta.fieldIndex(ArgsType, arg_name) orelse
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@compileError("no argument with name '" ++ arg_name ++ "'");
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_ = comptime arg_state.nextArg(arg_i) orelse @compileError("too few arguments");
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break :blk @field(args, arg_name);
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},
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};
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const arg_to_print = comptime arg_state.nextArg(arg_pos) orelse
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@compileError("too few arguments");
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try formatType(
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@field(args, fields_info[arg_to_print].name),
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placeholder.specifier_arg,
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FormatOptions{
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.fill = placeholder.fill,
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.alignment = placeholder.alignment,
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.width = width,
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.precision = precision,
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},
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writer,
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std.options.fmt_max_depth,
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);
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}
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if (comptime arg_state.hasUnusedArgs()) {
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const missing_count = arg_state.args_len - @popCount(arg_state.used_args);
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switch (missing_count) {
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0 => unreachable,
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1 => @compileError("unused argument in '" ++ fmt ++ "'"),
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else => @compileError(comptimePrint("{d}", .{missing_count}) ++ " unused arguments in '" ++ fmt ++ "'"),
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}
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}
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}
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fn cacheString(str: anytype) []const u8 {
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return &str;
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}
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pub const Placeholder = struct {
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specifier_arg: []const u8,
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fill: u8,
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alignment: Alignment,
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arg: Specifier,
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width: Specifier,
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precision: Specifier,
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pub fn parse(comptime str: anytype) Placeholder {
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comptime var parser = Parser{ .buf = &str };
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// Parse the positional argument number
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const arg = comptime parser.specifier() catch |err|
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@compileError(@errorName(err));
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// Parse the format specifier
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const specifier_arg = comptime parser.until(':');
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// Skip the colon, if present
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if (comptime parser.char()) |ch| {
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if (ch != ':') {
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@compileError("expected : or }, found '" ++ [1]u8{ch} ++ "'");
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}
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}
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// Parse the fill character
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// The fill parameter requires the alignment parameter to be specified
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// too
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const fill = comptime if (parser.peek(1)) |ch|
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switch (ch) {
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'<', '^', '>' => parser.char().?,
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else => ' ',
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}
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else
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' ';
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// Parse the alignment parameter
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const alignment: Alignment = comptime if (parser.peek(0)) |ch| init: {
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switch (ch) {
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'<', '^', '>' => _ = parser.char(),
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else => {},
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}
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break :init switch (ch) {
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'<' => .left,
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'^' => .center,
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else => .right,
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};
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} else .right;
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// Parse the width parameter
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const width = comptime parser.specifier() catch |err|
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@compileError(@errorName(err));
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// Skip the dot, if present
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if (comptime parser.char()) |ch| {
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if (ch != '.') {
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@compileError("expected . or }, found '" ++ [1]u8{ch} ++ "'");
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}
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}
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// Parse the precision parameter
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const precision = comptime parser.specifier() catch |err|
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@compileError(@errorName(err));
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if (comptime parser.char()) |ch| {
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@compileError("extraneous trailing character '" ++ [1]u8{ch} ++ "'");
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}
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return Placeholder{
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.specifier_arg = cacheString(specifier_arg[0..specifier_arg.len].*),
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.fill = fill,
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.alignment = alignment,
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.arg = arg,
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.width = width,
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.precision = precision,
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};
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}
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};
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pub const Specifier = union(enum) {
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none,
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number: usize,
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named: []const u8,
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};
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pub const Parser = struct {
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buf: []const u8,
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pos: usize = 0,
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// Returns a decimal number or null if the current character is not a
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// digit
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pub fn number(self: *@This()) ?usize {
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var r: ?usize = null;
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while (self.pos < self.buf.len) : (self.pos += 1) {
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switch (self.buf[self.pos]) {
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'0'...'9' => {
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if (r == null) r = 0;
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r.? *= 10;
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r.? += self.buf[self.pos] - '0';
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},
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else => break,
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}
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}
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return r;
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}
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// Returns a substring of the input starting from the current position
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// and ending where `ch` is found or until the end if not found
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pub fn until(self: *@This(), ch: u8) []const u8 {
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const start = self.pos;
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if (start >= self.buf.len)
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return &[_]u8{};
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while (self.pos < self.buf.len) : (self.pos += 1) {
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if (self.buf[self.pos] == ch) break;
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}
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return self.buf[start..self.pos];
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}
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// Returns one character, if available
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pub fn char(self: *@This()) ?u8 {
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if (self.pos < self.buf.len) {
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const ch = self.buf[self.pos];
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self.pos += 1;
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return ch;
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}
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return null;
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}
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pub fn maybe(self: *@This(), val: u8) bool {
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if (self.pos < self.buf.len and self.buf[self.pos] == val) {
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self.pos += 1;
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return true;
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}
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return false;
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}
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// Returns a decimal number or null if the current character is not a
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// digit
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pub fn specifier(self: *@This()) !Specifier {
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if (self.maybe('[')) {
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const arg_name = self.until(']');
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if (!self.maybe(']'))
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return @field(anyerror, "Expected closing ]");
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return Specifier{ .named = arg_name };
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}
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if (self.number()) |i|
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return Specifier{ .number = i };
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return Specifier{ .none = {} };
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}
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// Returns the n-th next character or null if that's past the end
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pub fn peek(self: *@This(), n: usize) ?u8 {
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return if (self.pos + n < self.buf.len) self.buf[self.pos + n] else null;
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}
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};
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pub const ArgSetType = u32;
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const max_format_args = @typeInfo(ArgSetType).Int.bits;
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pub const ArgState = struct {
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next_arg: usize = 0,
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used_args: ArgSetType = 0,
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args_len: usize,
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pub fn hasUnusedArgs(self: *@This()) bool {
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return @popCount(self.used_args) != self.args_len;
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}
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pub fn nextArg(self: *@This(), arg_index: ?usize) ?usize {
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const next_index = arg_index orelse init: {
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const arg = self.next_arg;
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self.next_arg += 1;
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break :init arg;
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||
};
|
||
|
||
if (next_index >= self.args_len) {
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return null;
|
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}
|
||
|
||
// Mark this argument as used
|
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self.used_args |= @as(ArgSetType, 1) << @as(u5, @intCast(next_index));
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return next_index;
|
||
}
|
||
};
|
||
|
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pub fn formatAddress(value: anytype, options: FormatOptions, writer: anytype) @TypeOf(writer).Error!void {
|
||
_ = options;
|
||
const T = @TypeOf(value);
|
||
|
||
switch (@typeInfo(T)) {
|
||
.Pointer => |info| {
|
||
try writer.writeAll(@typeName(info.child) ++ "@");
|
||
if (info.size == .Slice)
|
||
try formatInt(@intFromPtr(value.ptr), 16, .lower, FormatOptions{}, writer)
|
||
else
|
||
try formatInt(@intFromPtr(value), 16, .lower, FormatOptions{}, writer);
|
||
return;
|
||
},
|
||
.Optional => |info| {
|
||
if (@typeInfo(info.child) == .Pointer) {
|
||
try writer.writeAll(@typeName(info.child) ++ "@");
|
||
try formatInt(@intFromPtr(value), 16, .lower, FormatOptions{}, writer);
|
||
return;
|
||
}
|
||
},
|
||
else => {},
|
||
}
|
||
|
||
@compileError("cannot format non-pointer type " ++ @typeName(T) ++ " with * specifier");
|
||
}
|
||
|
||
// This ANY const is a workaround for: https://github.com/ziglang/zig/issues/7948
|
||
const ANY = "any";
|
||
|
||
pub fn defaultSpec(comptime T: type) [:0]const u8 {
|
||
switch (@typeInfo(T)) {
|
||
.Array => |_| return ANY,
|
||
.Pointer => |ptr_info| switch (ptr_info.size) {
|
||
.One => switch (@typeInfo(ptr_info.child)) {
|
||
.Array => |_| return "*",
|
||
else => {},
|
||
},
|
||
.Many, .C => return "*",
|
||
.Slice => return ANY,
|
||
},
|
||
.Optional => |info| return "?" ++ defaultSpec(info.child),
|
||
.ErrorUnion => |info| return "!" ++ defaultSpec(info.payload),
|
||
else => {},
|
||
}
|
||
return "";
|
||
}
|
||
|
||
fn stripOptionalOrErrorUnionSpec(comptime fmt: []const u8) []const u8 {
|
||
return if (std.mem.eql(u8, fmt[1..], ANY))
|
||
ANY
|
||
else
|
||
fmt[1..];
|
||
}
|
||
|
||
pub fn invalidFmtError(comptime fmt: []const u8, value: anytype) void {
|
||
@compileError("invalid format string '" ++ fmt ++ "' for type '" ++ @typeName(@TypeOf(value)) ++ "'");
|
||
}
|
||
|
||
pub fn formatType(
|
||
value: anytype,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
max_depth: usize,
|
||
) @TypeOf(writer).Error!void {
|
||
const T = @TypeOf(value);
|
||
const actual_fmt = comptime if (std.mem.eql(u8, fmt, ANY))
|
||
defaultSpec(@TypeOf(value))
|
||
else if (fmt.len != 0 and (fmt[0] == '?' or fmt[0] == '!')) switch (@typeInfo(T)) {
|
||
.Optional, .ErrorUnion => fmt,
|
||
else => stripOptionalOrErrorUnionSpec(fmt),
|
||
} else fmt;
|
||
|
||
if (comptime std.mem.eql(u8, actual_fmt, "*")) {
|
||
return formatAddress(value, options, writer);
|
||
}
|
||
|
||
if (comptime std.meta.trait.hasFn("format")(T)) {
|
||
return try value.format(actual_fmt, options, writer);
|
||
}
|
||
|
||
switch (@typeInfo(T)) {
|
||
.ComptimeInt, .Int, .ComptimeFloat, .Float => {
|
||
return formatValue(value, actual_fmt, options, writer);
|
||
},
|
||
.Void => {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
return formatBuf("void", options, writer);
|
||
},
|
||
.Bool => {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
return formatBuf(if (value) "true" else "false", options, writer);
|
||
},
|
||
.Optional => {
|
||
if (actual_fmt.len == 0 or actual_fmt[0] != '?')
|
||
@compileError("cannot format optional without a specifier (i.e. {?} or {any})");
|
||
const remaining_fmt = comptime stripOptionalOrErrorUnionSpec(actual_fmt);
|
||
if (value) |payload| {
|
||
return formatType(payload, remaining_fmt, options, writer, max_depth);
|
||
} else {
|
||
return formatBuf("null", options, writer);
|
||
}
|
||
},
|
||
.ErrorUnion => {
|
||
if (actual_fmt.len == 0 or actual_fmt[0] != '!')
|
||
@compileError("cannot format error union without a specifier (i.e. {!} or {any})");
|
||
const remaining_fmt = comptime stripOptionalOrErrorUnionSpec(actual_fmt);
|
||
if (value) |payload| {
|
||
return formatType(payload, remaining_fmt, options, writer, max_depth);
|
||
} else |err| {
|
||
return formatType(err, "", options, writer, max_depth);
|
||
}
|
||
},
|
||
.ErrorSet => {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
try writer.writeAll("error.");
|
||
return writer.writeAll(@errorName(value));
|
||
},
|
||
.Enum => |enumInfo| {
|
||
try writer.writeAll(@typeName(T));
|
||
if (enumInfo.is_exhaustive) {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
try writer.writeAll(".");
|
||
try writer.writeAll(@tagName(value));
|
||
return;
|
||
}
|
||
|
||
// Use @tagName only if value is one of known fields
|
||
@setEvalBranchQuota(3 * enumInfo.fields.len);
|
||
inline for (enumInfo.fields) |enumField| {
|
||
if (@intFromEnum(value) == enumField.value) {
|
||
try writer.writeAll(".");
|
||
try writer.writeAll(@tagName(value));
|
||
return;
|
||
}
|
||
}
|
||
|
||
try writer.writeAll("(");
|
||
try formatType(@intFromEnum(value), actual_fmt, options, writer, max_depth);
|
||
try writer.writeAll(")");
|
||
},
|
||
.Union => |info| {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
try writer.writeAll(@typeName(T));
|
||
if (max_depth == 0) {
|
||
return writer.writeAll("{ ... }");
|
||
}
|
||
if (info.tag_type) |UnionTagType| {
|
||
try writer.writeAll("{ .");
|
||
try writer.writeAll(@tagName(@as(UnionTagType, value)));
|
||
try writer.writeAll(" = ");
|
||
inline for (info.fields) |u_field| {
|
||
if (value == @field(UnionTagType, u_field.name)) {
|
||
try formatType(@field(value, u_field.name), ANY, options, writer, max_depth - 1);
|
||
}
|
||
}
|
||
try writer.writeAll(" }");
|
||
} else {
|
||
try format(writer, "@{x}", .{@intFromPtr(&value)});
|
||
}
|
||
},
|
||
.Struct => |info| {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
if (info.is_tuple) {
|
||
// Skip the type and field names when formatting tuples.
|
||
if (max_depth == 0) {
|
||
return writer.writeAll("{ ... }");
|
||
}
|
||
try writer.writeAll("{");
|
||
inline for (info.fields, 0..) |f, i| {
|
||
if (i == 0) {
|
||
try writer.writeAll(" ");
|
||
} else {
|
||
try writer.writeAll(", ");
|
||
}
|
||
try formatType(@field(value, f.name), ANY, options, writer, max_depth - 1);
|
||
}
|
||
return writer.writeAll(" }");
|
||
}
|
||
try writer.writeAll(@typeName(T));
|
||
if (max_depth == 0) {
|
||
return writer.writeAll("{ ... }");
|
||
}
|
||
try writer.writeAll("{");
|
||
inline for (info.fields, 0..) |f, i| {
|
||
if (i == 0) {
|
||
try writer.writeAll(" .");
|
||
} else {
|
||
try writer.writeAll(", .");
|
||
}
|
||
try writer.writeAll(f.name);
|
||
try writer.writeAll(" = ");
|
||
try formatType(@field(value, f.name), ANY, options, writer, max_depth - 1);
|
||
}
|
||
try writer.writeAll(" }");
|
||
},
|
||
.Pointer => |ptr_info| switch (ptr_info.size) {
|
||
.One => switch (@typeInfo(ptr_info.child)) {
|
||
.Array => |info| {
|
||
if (actual_fmt.len == 0)
|
||
@compileError("cannot format array ref without a specifier (i.e. {s} or {*})");
|
||
if (info.child == u8) {
|
||
switch (actual_fmt[0]) {
|
||
's', 'x', 'X', 'e', 'E' => {
|
||
comptime checkTextFmt(actual_fmt);
|
||
return formatBuf(value, options, writer);
|
||
},
|
||
else => {},
|
||
}
|
||
}
|
||
if (comptime std.meta.trait.isZigString(info.child)) {
|
||
for (value, 0..) |item, i| {
|
||
comptime checkTextFmt(actual_fmt);
|
||
if (i != 0) try formatBuf(", ", options, writer);
|
||
try formatBuf(item, options, writer);
|
||
}
|
||
return;
|
||
}
|
||
invalidFmtError(fmt, value);
|
||
},
|
||
.Enum, .Union, .Struct => {
|
||
return formatType(value.*, actual_fmt, options, writer, max_depth);
|
||
},
|
||
else => return format(writer, "{s}@{x}", .{ @typeName(ptr_info.child), @intFromPtr(value) }),
|
||
},
|
||
.Many, .C => {
|
||
if (actual_fmt.len == 0)
|
||
@compileError("cannot format pointer without a specifier (i.e. {s} or {*})");
|
||
if (ptr_info.sentinel) |_| {
|
||
return formatType(mem.span(value), actual_fmt, options, writer, max_depth);
|
||
}
|
||
if (ptr_info.child == u8) {
|
||
switch (actual_fmt[0]) {
|
||
's', 'x', 'X', 'e', 'E' => {
|
||
comptime checkTextFmt(actual_fmt);
|
||
return formatBuf(mem.span(value), options, writer);
|
||
},
|
||
else => {},
|
||
}
|
||
}
|
||
invalidFmtError(fmt, value);
|
||
},
|
||
.Slice => {
|
||
if (actual_fmt.len == 0)
|
||
@compileError("cannot format slice without a specifier (i.e. {s} or {any})");
|
||
if (max_depth == 0) {
|
||
return writer.writeAll("{ ... }");
|
||
}
|
||
if (ptr_info.child == u8) {
|
||
switch (actual_fmt[0]) {
|
||
's', 'x', 'X', 'e', 'E' => {
|
||
comptime checkTextFmt(actual_fmt);
|
||
return formatBuf(value, options, writer);
|
||
},
|
||
else => {},
|
||
}
|
||
}
|
||
try writer.writeAll("{ ");
|
||
for (value, 0..) |elem, i| {
|
||
try formatType(elem, actual_fmt, options, writer, max_depth - 1);
|
||
if (i != value.len - 1) {
|
||
try writer.writeAll(", ");
|
||
}
|
||
}
|
||
try writer.writeAll(" }");
|
||
},
|
||
},
|
||
.Array => |info| {
|
||
if (actual_fmt.len == 0)
|
||
@compileError("cannot format array without a specifier (i.e. {s} or {any})");
|
||
if (max_depth == 0) {
|
||
return writer.writeAll("{ ... }");
|
||
}
|
||
if (info.child == u8) {
|
||
switch (actual_fmt[0]) {
|
||
's', 'x', 'X', 'e', 'E' => {
|
||
comptime checkTextFmt(actual_fmt);
|
||
return formatBuf(&value, options, writer);
|
||
},
|
||
else => {},
|
||
}
|
||
}
|
||
try writer.writeAll("{ ");
|
||
for (value, 0..) |elem, i| {
|
||
try formatType(elem, actual_fmt, options, writer, max_depth - 1);
|
||
if (i < value.len - 1) {
|
||
try writer.writeAll(", ");
|
||
}
|
||
}
|
||
try writer.writeAll(" }");
|
||
},
|
||
.Vector => |info| {
|
||
try writer.writeAll("{ ");
|
||
var i: usize = 0;
|
||
while (i < info.len) : (i += 1) {
|
||
try formatValue(value[i], actual_fmt, options, writer);
|
||
if (i < info.len - 1) {
|
||
try writer.writeAll(", ");
|
||
}
|
||
}
|
||
try writer.writeAll(" }");
|
||
},
|
||
.Fn => @compileError("unable to format function body type, use '*const " ++ @typeName(T) ++ "' for a function pointer type"),
|
||
.Type => {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
return formatBuf(@typeName(value), options, writer);
|
||
},
|
||
.EnumLiteral => {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
const buffer = [_]u8{'.'} ++ @tagName(value);
|
||
return formatBuf(buffer, options, writer);
|
||
},
|
||
.Null => {
|
||
if (actual_fmt.len != 0) invalidFmtError(fmt, value);
|
||
return formatBuf("null", options, writer);
|
||
},
|
||
else => @compileError("unable to format type '" ++ @typeName(T) ++ "'"),
|
||
}
|
||
}
|
||
|
||
fn formatValue(
|
||
value: anytype,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
const T = @TypeOf(value);
|
||
switch (@typeInfo(T)) {
|
||
.Float, .ComptimeFloat => return formatFloatValue(value, fmt, options, writer),
|
||
.Int, .ComptimeInt => return formatIntValue(value, fmt, options, writer),
|
||
.Bool => return formatBuf(if (value) "true" else "false", options, writer),
|
||
else => comptime unreachable,
|
||
}
|
||
}
|
||
|
||
pub fn formatIntValue(
|
||
value: anytype,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
comptime var base = 10;
|
||
comptime var case: Case = .lower;
|
||
|
||
const int_value = if (@TypeOf(value) == comptime_int) blk: {
|
||
const Int = math.IntFittingRange(value, value);
|
||
break :blk @as(Int, value);
|
||
} else value;
|
||
|
||
if (fmt.len == 0 or comptime std.mem.eql(u8, fmt, "d")) {
|
||
base = 10;
|
||
case = .lower;
|
||
} else if (comptime std.mem.eql(u8, fmt, "c")) {
|
||
if (@typeInfo(@TypeOf(int_value)).Int.bits <= 8) {
|
||
return formatAsciiChar(@as(u8, int_value), options, writer);
|
||
} else {
|
||
@compileError("cannot print integer that is larger than 8 bits as an ASCII character");
|
||
}
|
||
} else if (comptime std.mem.eql(u8, fmt, "u")) {
|
||
if (@typeInfo(@TypeOf(int_value)).Int.bits <= 21) {
|
||
return formatUnicodeCodepoint(@as(u21, int_value), options, writer);
|
||
} else {
|
||
@compileError("cannot print integer that is larger than 21 bits as an UTF-8 sequence");
|
||
}
|
||
} else if (comptime std.mem.eql(u8, fmt, "b")) {
|
||
base = 2;
|
||
case = .lower;
|
||
} else if (comptime std.mem.eql(u8, fmt, "x")) {
|
||
base = 16;
|
||
case = .lower;
|
||
} else if (comptime std.mem.eql(u8, fmt, "X")) {
|
||
base = 16;
|
||
case = .upper;
|
||
} else if (comptime std.mem.eql(u8, fmt, "o")) {
|
||
base = 8;
|
||
case = .lower;
|
||
} else {
|
||
invalidFmtError(fmt, value);
|
||
}
|
||
|
||
return formatInt(int_value, base, case, options, writer);
|
||
}
|
||
|
||
fn formatFloatValue(
|
||
value: anytype,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
// this buffer should be enough to display all decimal places of a decimal f64 number.
|
||
var buf: [512]u8 = undefined;
|
||
var buf_stream = std.io.fixedBufferStream(&buf);
|
||
|
||
if (fmt.len == 0 or comptime std.mem.eql(u8, fmt, "e")) {
|
||
formatFloatScientific(value, options, buf_stream.writer()) catch |err| switch (err) {
|
||
error.NoSpaceLeft => unreachable,
|
||
};
|
||
} else if (comptime std.mem.eql(u8, fmt, "d")) {
|
||
formatFloatDecimal(value, options, buf_stream.writer()) catch |err| switch (err) {
|
||
error.NoSpaceLeft => unreachable,
|
||
};
|
||
} else if (comptime std.mem.eql(u8, fmt, "x")) {
|
||
formatFloatHexadecimal(value, options, buf_stream.writer()) catch |err| switch (err) {
|
||
error.NoSpaceLeft => unreachable,
|
||
};
|
||
} else {
|
||
invalidFmtError(fmt, value);
|
||
}
|
||
|
||
return formatBuf(buf_stream.getWritten(), options, writer);
|
||
}
|
||
|
||
pub const Case = enum { lower, upper };
|
||
|
||
fn formatSliceHexImpl(comptime case: Case) type {
|
||
const charset = "0123456789" ++ if (case == .upper) "ABCDEF" else "abcdef";
|
||
|
||
return struct {
|
||
pub fn formatSliceHexImpl(
|
||
bytes: []const u8,
|
||
comptime fmt: []const u8,
|
||
options: std.fmt.FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
_ = fmt;
|
||
_ = options;
|
||
var buf: [2]u8 = undefined;
|
||
|
||
for (bytes) |c| {
|
||
buf[0] = charset[c >> 4];
|
||
buf[1] = charset[c & 15];
|
||
try writer.writeAll(&buf);
|
||
}
|
||
}
|
||
};
|
||
}
|
||
|
||
const formatSliceHexLower = formatSliceHexImpl(.lower).formatSliceHexImpl;
|
||
const formatSliceHexUpper = formatSliceHexImpl(.upper).formatSliceHexImpl;
|
||
|
||
/// Return a Formatter for a []const u8 where every byte is formatted as a pair
|
||
/// of lowercase hexadecimal digits.
|
||
pub fn fmtSliceHexLower(bytes: []const u8) std.fmt.Formatter(formatSliceHexLower) {
|
||
return .{ .data = bytes };
|
||
}
|
||
|
||
/// Return a Formatter for a []const u8 where every byte is formatted as pair
|
||
/// of uppercase hexadecimal digits.
|
||
pub fn fmtSliceHexUpper(bytes: []const u8) std.fmt.Formatter(formatSliceHexUpper) {
|
||
return .{ .data = bytes };
|
||
}
|
||
|
||
fn formatSliceEscapeImpl(comptime case: Case) type {
|
||
const charset = "0123456789" ++ if (case == .upper) "ABCDEF" else "abcdef";
|
||
|
||
return struct {
|
||
pub fn formatSliceEscapeImpl(
|
||
bytes: []const u8,
|
||
comptime fmt: []const u8,
|
||
options: std.fmt.FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
_ = fmt;
|
||
_ = options;
|
||
var buf: [4]u8 = undefined;
|
||
|
||
buf[0] = '\\';
|
||
buf[1] = 'x';
|
||
|
||
for (bytes) |c| {
|
||
if (std.ascii.isPrint(c)) {
|
||
try writer.writeByte(c);
|
||
} else {
|
||
buf[2] = charset[c >> 4];
|
||
buf[3] = charset[c & 15];
|
||
try writer.writeAll(&buf);
|
||
}
|
||
}
|
||
}
|
||
};
|
||
}
|
||
|
||
const formatSliceEscapeLower = formatSliceEscapeImpl(.lower).formatSliceEscapeImpl;
|
||
const formatSliceEscapeUpper = formatSliceEscapeImpl(.upper).formatSliceEscapeImpl;
|
||
|
||
/// Return a Formatter for a []const u8 where every non-printable ASCII
|
||
/// character is escaped as \xNN, where NN is the character in lowercase
|
||
/// hexadecimal notation.
|
||
pub fn fmtSliceEscapeLower(bytes: []const u8) std.fmt.Formatter(formatSliceEscapeLower) {
|
||
return .{ .data = bytes };
|
||
}
|
||
|
||
/// Return a Formatter for a []const u8 where every non-printable ASCII
|
||
/// character is escaped as \xNN, where NN is the character in uppercase
|
||
/// hexadecimal notation.
|
||
pub fn fmtSliceEscapeUpper(bytes: []const u8) std.fmt.Formatter(formatSliceEscapeUpper) {
|
||
return .{ .data = bytes };
|
||
}
|
||
|
||
fn formatSizeImpl(comptime base: comptime_int) type {
|
||
return struct {
|
||
fn formatSizeImpl(
|
||
value: u64,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
_ = fmt;
|
||
if (value == 0) {
|
||
return formatBuf("0B", options, writer);
|
||
}
|
||
// The worst case in terms of space needed is 32 bytes + 3 for the suffix.
|
||
var buf: [35]u8 = undefined;
|
||
var bufstream = io.fixedBufferStream(buf[0..]);
|
||
|
||
const mags_si = " kMGTPEZY";
|
||
const mags_iec = " KMGTPEZY";
|
||
|
||
const log2 = math.log2(value);
|
||
const magnitude = switch (base) {
|
||
1000 => @min(log2 / comptime math.log2(1000), mags_si.len - 1),
|
||
1024 => @min(log2 / 10, mags_iec.len - 1),
|
||
else => unreachable,
|
||
};
|
||
const new_value = lossyCast(f64, value) / math.pow(f64, lossyCast(f64, base), lossyCast(f64, magnitude));
|
||
const suffix = switch (base) {
|
||
1000 => mags_si[magnitude],
|
||
1024 => mags_iec[magnitude],
|
||
else => unreachable,
|
||
};
|
||
|
||
formatFloatDecimal(new_value, options, bufstream.writer()) catch |err| switch (err) {
|
||
error.NoSpaceLeft => unreachable, // 35 bytes should be enough
|
||
};
|
||
|
||
bufstream.writer().writeAll(if (suffix == ' ')
|
||
"B"
|
||
else switch (base) {
|
||
1000 => &[_]u8{ suffix, 'B' },
|
||
1024 => &[_]u8{ suffix, 'i', 'B' },
|
||
else => unreachable,
|
||
}) catch |err| switch (err) {
|
||
error.NoSpaceLeft => unreachable,
|
||
};
|
||
return formatBuf(bufstream.getWritten(), options, writer);
|
||
}
|
||
};
|
||
}
|
||
|
||
const formatSizeDec = formatSizeImpl(1000).formatSizeImpl;
|
||
const formatSizeBin = formatSizeImpl(1024).formatSizeImpl;
|
||
|
||
/// Return a Formatter for a u64 value representing a file size.
|
||
/// This formatter represents the number as multiple of 1000 and uses the SI
|
||
/// measurement units (kB, MB, GB, ...).
|
||
pub fn fmtIntSizeDec(value: u64) std.fmt.Formatter(formatSizeDec) {
|
||
return .{ .data = value };
|
||
}
|
||
|
||
/// Return a Formatter for a u64 value representing a file size.
|
||
/// This formatter represents the number as multiple of 1024 and uses the IEC
|
||
/// measurement units (KiB, MiB, GiB, ...).
|
||
pub fn fmtIntSizeBin(value: u64) std.fmt.Formatter(formatSizeBin) {
|
||
return .{ .data = value };
|
||
}
|
||
|
||
fn checkTextFmt(comptime fmt: []const u8) void {
|
||
if (fmt.len != 1)
|
||
@compileError("unsupported format string '" ++ fmt ++ "' when formatting text");
|
||
switch (fmt[0]) {
|
||
// Example of deprecation:
|
||
// '[deprecated_specifier]' => @compileError("specifier '[deprecated_specifier]' has been deprecated, wrap your argument in `std.some_function` instead"),
|
||
'x' => @compileError("specifier 'x' has been deprecated, wrap your argument in std.fmt.fmtSliceHexLower instead"),
|
||
'X' => @compileError("specifier 'X' has been deprecated, wrap your argument in std.fmt.fmtSliceHexUpper instead"),
|
||
else => {},
|
||
}
|
||
}
|
||
|
||
pub fn formatText(
|
||
bytes: []const u8,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
comptime checkTextFmt(fmt);
|
||
return formatBuf(bytes, options, writer);
|
||
}
|
||
|
||
pub fn formatAsciiChar(
|
||
c: u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
return formatBuf(@as(*const [1]u8, &c), options, writer);
|
||
}
|
||
|
||
pub fn formatUnicodeCodepoint(
|
||
c: u21,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
var buf: [4]u8 = undefined;
|
||
const len = unicode.utf8Encode(c, &buf) catch |err| switch (err) {
|
||
error.Utf8CannotEncodeSurrogateHalf, error.CodepointTooLarge => {
|
||
const len = unicode.utf8Encode(unicode.replacement_character, &buf) catch unreachable;
|
||
return formatBuf(buf[0..len], options, writer);
|
||
},
|
||
};
|
||
return formatBuf(buf[0..len], options, writer);
|
||
}
|
||
|
||
pub fn formatBuf(
|
||
buf: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
if (options.width) |min_width| {
|
||
// In case of error assume the buffer content is ASCII-encoded
|
||
const width = unicode.utf8CountCodepoints(buf) catch buf.len;
|
||
const padding = if (width < min_width) min_width - width else 0;
|
||
|
||
if (padding == 0)
|
||
return writer.writeAll(buf);
|
||
|
||
switch (options.alignment) {
|
||
.left => {
|
||
try writer.writeAll(buf);
|
||
try writer.writeByteNTimes(options.fill, padding);
|
||
},
|
||
.center => {
|
||
const left_padding = padding / 2;
|
||
const right_padding = (padding + 1) / 2;
|
||
try writer.writeByteNTimes(options.fill, left_padding);
|
||
try writer.writeAll(buf);
|
||
try writer.writeByteNTimes(options.fill, right_padding);
|
||
},
|
||
.right => {
|
||
try writer.writeByteNTimes(options.fill, padding);
|
||
try writer.writeAll(buf);
|
||
},
|
||
}
|
||
} else {
|
||
// Fast path, avoid counting the number of codepoints
|
||
try writer.writeAll(buf);
|
||
}
|
||
}
|
||
|
||
/// Print a float in scientific notation to the specified precision. Null uses full precision.
|
||
/// It should be the case that every full precision, printed value can be re-parsed back to the
|
||
/// same type unambiguously.
|
||
pub fn formatFloatScientific(
|
||
value: anytype,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
var x = @as(f64, @floatCast(value));
|
||
|
||
// Errol doesn't handle these special cases.
|
||
if (math.signbit(x)) {
|
||
try writer.writeAll("-");
|
||
x = -x;
|
||
}
|
||
|
||
if (math.isNan(x)) {
|
||
return writer.writeAll("nan");
|
||
}
|
||
if (math.isPositiveInf(x)) {
|
||
return writer.writeAll("inf");
|
||
}
|
||
if (x == 0.0) {
|
||
try writer.writeAll("0");
|
||
|
||
if (options.precision) |precision| {
|
||
if (precision != 0) {
|
||
try writer.writeAll(".");
|
||
var i: usize = 0;
|
||
while (i < precision) : (i += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
}
|
||
} else {
|
||
try writer.writeAll(".0");
|
||
}
|
||
|
||
try writer.writeAll("e+00");
|
||
return;
|
||
}
|
||
|
||
var buffer: [32]u8 = undefined;
|
||
var float_decimal = errol.errol3(x, buffer[0..]);
|
||
|
||
if (options.precision) |precision| {
|
||
errol.roundToPrecision(&float_decimal, precision, errol.RoundMode.Scientific);
|
||
|
||
try writer.writeAll(float_decimal.digits[0..1]);
|
||
|
||
// {e0} case prints no `.`
|
||
if (precision != 0) {
|
||
try writer.writeAll(".");
|
||
|
||
var printed: usize = 0;
|
||
if (float_decimal.digits.len > 1) {
|
||
const num_digits = @min(float_decimal.digits.len, precision + 1);
|
||
try writer.writeAll(float_decimal.digits[1..num_digits]);
|
||
printed += num_digits - 1;
|
||
}
|
||
|
||
while (printed < precision) : (printed += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
}
|
||
} else {
|
||
try writer.writeAll(float_decimal.digits[0..1]);
|
||
try writer.writeAll(".");
|
||
if (float_decimal.digits.len > 1) {
|
||
const num_digits = if (@TypeOf(value) == f32) @min(@as(usize, 9), float_decimal.digits.len) else float_decimal.digits.len;
|
||
|
||
try writer.writeAll(float_decimal.digits[1..num_digits]);
|
||
} else {
|
||
try writer.writeAll("0");
|
||
}
|
||
}
|
||
|
||
try writer.writeAll("e");
|
||
const exp = float_decimal.exp - 1;
|
||
|
||
if (exp >= 0) {
|
||
try writer.writeAll("+");
|
||
if (exp > -10 and exp < 10) {
|
||
try writer.writeAll("0");
|
||
}
|
||
try formatInt(exp, 10, .lower, FormatOptions{ .width = 0 }, writer);
|
||
} else {
|
||
try writer.writeAll("-");
|
||
if (exp > -10 and exp < 10) {
|
||
try writer.writeAll("0");
|
||
}
|
||
try formatInt(-exp, 10, .lower, FormatOptions{ .width = 0 }, writer);
|
||
}
|
||
}
|
||
|
||
pub fn formatFloatHexadecimal(
|
||
value: anytype,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
if (math.signbit(value)) {
|
||
try writer.writeByte('-');
|
||
}
|
||
if (math.isNan(value)) {
|
||
return writer.writeAll("nan");
|
||
}
|
||
if (math.isInf(value)) {
|
||
return writer.writeAll("inf");
|
||
}
|
||
|
||
const T = @TypeOf(value);
|
||
const TU = std.meta.Int(.unsigned, @bitSizeOf(T));
|
||
|
||
const mantissa_bits = math.floatMantissaBits(T);
|
||
const fractional_bits = math.floatFractionalBits(T);
|
||
const exponent_bits = math.floatExponentBits(T);
|
||
const mantissa_mask = (1 << mantissa_bits) - 1;
|
||
const exponent_mask = (1 << exponent_bits) - 1;
|
||
const exponent_bias = (1 << (exponent_bits - 1)) - 1;
|
||
|
||
const as_bits = @as(TU, @bitCast(value));
|
||
var mantissa = as_bits & mantissa_mask;
|
||
var exponent: i32 = @as(u16, @truncate((as_bits >> mantissa_bits) & exponent_mask));
|
||
|
||
const is_denormal = exponent == 0 and mantissa != 0;
|
||
const is_zero = exponent == 0 and mantissa == 0;
|
||
|
||
if (is_zero) {
|
||
// Handle this case here to simplify the logic below.
|
||
try writer.writeAll("0x0");
|
||
if (options.precision) |precision| {
|
||
if (precision > 0) {
|
||
try writer.writeAll(".");
|
||
try writer.writeByteNTimes('0', precision);
|
||
}
|
||
} else {
|
||
try writer.writeAll(".0");
|
||
}
|
||
try writer.writeAll("p0");
|
||
return;
|
||
}
|
||
|
||
if (is_denormal) {
|
||
// Adjust the exponent for printing.
|
||
exponent += 1;
|
||
} else {
|
||
if (fractional_bits == mantissa_bits)
|
||
mantissa |= 1 << fractional_bits; // Add the implicit integer bit.
|
||
}
|
||
|
||
const mantissa_digits = (fractional_bits + 3) / 4;
|
||
// Fill in zeroes to round the fraction width to a multiple of 4.
|
||
mantissa <<= mantissa_digits * 4 - fractional_bits;
|
||
|
||
if (options.precision) |precision| {
|
||
// Round if needed.
|
||
if (precision < mantissa_digits) {
|
||
// We always have at least 4 extra bits.
|
||
var extra_bits = (mantissa_digits - precision) * 4;
|
||
// The result LSB is the Guard bit, we need two more (Round and
|
||
// Sticky) to round the value.
|
||
while (extra_bits > 2) {
|
||
mantissa = (mantissa >> 1) | (mantissa & 1);
|
||
extra_bits -= 1;
|
||
}
|
||
// Round to nearest, tie to even.
|
||
mantissa |= @intFromBool(mantissa & 0b100 != 0);
|
||
mantissa += 1;
|
||
// Drop the excess bits.
|
||
mantissa >>= 2;
|
||
// Restore the alignment.
|
||
mantissa <<= @as(math.Log2Int(TU), @intCast((mantissa_digits - precision) * 4));
|
||
|
||
const overflow = mantissa & (1 << 1 + mantissa_digits * 4) != 0;
|
||
// Prefer a normalized result in case of overflow.
|
||
if (overflow) {
|
||
mantissa >>= 1;
|
||
exponent += 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
// +1 for the decimal part.
|
||
var buf: [1 + mantissa_digits]u8 = undefined;
|
||
_ = formatIntBuf(&buf, mantissa, 16, .lower, .{ .fill = '0', .width = 1 + mantissa_digits });
|
||
|
||
try writer.writeAll("0x");
|
||
try writer.writeByte(buf[0]);
|
||
const trimmed = mem.trimRight(u8, buf[1..], "0");
|
||
if (options.precision) |precision| {
|
||
if (precision > 0) try writer.writeAll(".");
|
||
} else if (trimmed.len > 0) {
|
||
try writer.writeAll(".");
|
||
}
|
||
try writer.writeAll(trimmed);
|
||
// Add trailing zeros if explicitly requested.
|
||
if (options.precision) |precision| if (precision > 0) {
|
||
if (precision > trimmed.len)
|
||
try writer.writeByteNTimes('0', precision - trimmed.len);
|
||
};
|
||
try writer.writeAll("p");
|
||
try formatInt(exponent - exponent_bias, 10, .lower, .{}, writer);
|
||
}
|
||
|
||
/// Print a float of the format x.yyyyy where the number of y is specified by the precision argument.
|
||
/// By default floats are printed at full precision (no rounding).
|
||
pub fn formatFloatDecimal(
|
||
value: anytype,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
var x = @as(f64, value);
|
||
|
||
// Errol doesn't handle these special cases.
|
||
if (math.signbit(x)) {
|
||
try writer.writeAll("-");
|
||
x = -x;
|
||
}
|
||
|
||
if (math.isNan(x)) {
|
||
return writer.writeAll("nan");
|
||
}
|
||
if (math.isPositiveInf(x)) {
|
||
return writer.writeAll("inf");
|
||
}
|
||
if (x == 0.0) {
|
||
try writer.writeAll("0");
|
||
|
||
if (options.precision) |precision| {
|
||
if (precision != 0) {
|
||
try writer.writeAll(".");
|
||
var i: usize = 0;
|
||
while (i < precision) : (i += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
}
|
||
}
|
||
|
||
return;
|
||
}
|
||
|
||
// non-special case, use errol3
|
||
var buffer: [32]u8 = undefined;
|
||
var float_decimal = errol.errol3(x, buffer[0..]);
|
||
|
||
if (options.precision) |precision| {
|
||
errol.roundToPrecision(&float_decimal, precision, errol.RoundMode.Decimal);
|
||
|
||
// exp < 0 means the leading is always 0 as errol result is normalized.
|
||
var num_digits_whole = if (float_decimal.exp > 0) @as(usize, @intCast(float_decimal.exp)) else 0;
|
||
|
||
// the actual slice into the buffer, we may need to zero-pad between num_digits_whole and this.
|
||
var num_digits_whole_no_pad = @min(num_digits_whole, float_decimal.digits.len);
|
||
|
||
if (num_digits_whole > 0) {
|
||
// We may have to zero pad, for instance 1e4 requires zero padding.
|
||
try writer.writeAll(float_decimal.digits[0..num_digits_whole_no_pad]);
|
||
|
||
var i = num_digits_whole_no_pad;
|
||
while (i < num_digits_whole) : (i += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
} else {
|
||
try writer.writeAll("0");
|
||
}
|
||
|
||
// {.0} special case doesn't want a trailing '.'
|
||
if (precision == 0) {
|
||
return;
|
||
}
|
||
|
||
try writer.writeAll(".");
|
||
|
||
// Keep track of fractional count printed for case where we pre-pad then post-pad with 0's.
|
||
var printed: usize = 0;
|
||
|
||
// Zero-fill until we reach significant digits or run out of precision.
|
||
if (float_decimal.exp <= 0) {
|
||
const zero_digit_count = @as(usize, @intCast(-float_decimal.exp));
|
||
const zeros_to_print = @min(zero_digit_count, precision);
|
||
|
||
var i: usize = 0;
|
||
while (i < zeros_to_print) : (i += 1) {
|
||
try writer.writeAll("0");
|
||
printed += 1;
|
||
}
|
||
|
||
if (printed >= precision) {
|
||
return;
|
||
}
|
||
}
|
||
|
||
// Remaining fractional portion, zero-padding if insufficient.
|
||
assert(precision >= printed);
|
||
if (num_digits_whole_no_pad + precision - printed < float_decimal.digits.len) {
|
||
try writer.writeAll(float_decimal.digits[num_digits_whole_no_pad .. num_digits_whole_no_pad + precision - printed]);
|
||
return;
|
||
} else {
|
||
try writer.writeAll(float_decimal.digits[num_digits_whole_no_pad..]);
|
||
printed += float_decimal.digits.len - num_digits_whole_no_pad;
|
||
|
||
while (printed < precision) : (printed += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
}
|
||
} else {
|
||
// exp < 0 means the leading is always 0 as errol result is normalized.
|
||
var num_digits_whole = if (float_decimal.exp > 0) @as(usize, @intCast(float_decimal.exp)) else 0;
|
||
|
||
// the actual slice into the buffer, we may need to zero-pad between num_digits_whole and this.
|
||
var num_digits_whole_no_pad = @min(num_digits_whole, float_decimal.digits.len);
|
||
|
||
if (num_digits_whole > 0) {
|
||
// We may have to zero pad, for instance 1e4 requires zero padding.
|
||
try writer.writeAll(float_decimal.digits[0..num_digits_whole_no_pad]);
|
||
|
||
var i = num_digits_whole_no_pad;
|
||
while (i < num_digits_whole) : (i += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
} else {
|
||
try writer.writeAll("0");
|
||
}
|
||
|
||
// Omit `.` if no fractional portion
|
||
if (float_decimal.exp >= 0 and num_digits_whole_no_pad == float_decimal.digits.len) {
|
||
return;
|
||
}
|
||
|
||
try writer.writeAll(".");
|
||
|
||
// Zero-fill until we reach significant digits or run out of precision.
|
||
if (float_decimal.exp < 0) {
|
||
const zero_digit_count = @as(usize, @intCast(-float_decimal.exp));
|
||
|
||
var i: usize = 0;
|
||
while (i < zero_digit_count) : (i += 1) {
|
||
try writer.writeAll("0");
|
||
}
|
||
}
|
||
|
||
try writer.writeAll(float_decimal.digits[num_digits_whole_no_pad..]);
|
||
}
|
||
}
|
||
|
||
pub fn formatInt(
|
||
value: anytype,
|
||
base: u8,
|
||
case: Case,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
assert(base >= 2);
|
||
|
||
const int_value = if (@TypeOf(value) == comptime_int) blk: {
|
||
const Int = math.IntFittingRange(value, value);
|
||
break :blk @as(Int, value);
|
||
} else value;
|
||
|
||
const value_info = @typeInfo(@TypeOf(int_value)).Int;
|
||
|
||
// The type must have the same size as `base` or be wider in order for the
|
||
// division to work
|
||
const min_int_bits = comptime @max(value_info.bits, 8);
|
||
const MinInt = std.meta.Int(.unsigned, min_int_bits);
|
||
|
||
const abs_value = math.absCast(int_value);
|
||
// The worst case in terms of space needed is base 2, plus 1 for the sign
|
||
var buf: [1 + @max(@as(comptime_int, value_info.bits), 1)]u8 = undefined;
|
||
|
||
var a: MinInt = abs_value;
|
||
var index: usize = buf.len;
|
||
|
||
if (base == 10) {
|
||
while (a >= 100) : (a = @divTrunc(a, 100)) {
|
||
index -= 2;
|
||
buf[index..][0..2].* = digits2(@as(usize, @intCast(a % 100)));
|
||
}
|
||
|
||
if (a < 10) {
|
||
index -= 1;
|
||
buf[index] = '0' + @as(u8, @intCast(a));
|
||
} else {
|
||
index -= 2;
|
||
buf[index..][0..2].* = digits2(@as(usize, @intCast(a)));
|
||
}
|
||
} else {
|
||
while (true) {
|
||
const digit = a % base;
|
||
index -= 1;
|
||
buf[index] = digitToChar(@as(u8, @intCast(digit)), case);
|
||
a /= base;
|
||
if (a == 0) break;
|
||
}
|
||
}
|
||
|
||
if (value_info.signedness == .signed) {
|
||
if (value < 0) {
|
||
// Negative integer
|
||
index -= 1;
|
||
buf[index] = '-';
|
||
} else if (options.width == null or options.width.? == 0) {
|
||
// Positive integer, omit the plus sign
|
||
} else {
|
||
// Positive integer
|
||
index -= 1;
|
||
buf[index] = '+';
|
||
}
|
||
}
|
||
|
||
return formatBuf(buf[index..], options, writer);
|
||
}
|
||
|
||
pub fn formatIntBuf(out_buf: []u8, value: anytype, base: u8, case: Case, options: FormatOptions) usize {
|
||
var fbs = std.io.fixedBufferStream(out_buf);
|
||
formatInt(value, base, case, options, fbs.writer()) catch unreachable;
|
||
return fbs.pos;
|
||
}
|
||
|
||
// Converts values in the range [0, 100) to a string.
|
||
fn digits2(value: usize) [2]u8 {
|
||
return ("0001020304050607080910111213141516171819" ++
|
||
"2021222324252627282930313233343536373839" ++
|
||
"4041424344454647484950515253545556575859" ++
|
||
"6061626364656667686970717273747576777879" ++
|
||
"8081828384858687888990919293949596979899")[value * 2 ..][0..2].*;
|
||
}
|
||
|
||
const FormatDurationData = struct {
|
||
ns: u64,
|
||
negative: bool = false,
|
||
};
|
||
|
||
fn formatDuration(data: FormatDurationData, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {
|
||
_ = fmt;
|
||
|
||
// worst case: "-XXXyXXwXXdXXhXXmXX.XXXs".len = 24
|
||
var buf: [24]u8 = undefined;
|
||
var fbs = std.io.fixedBufferStream(&buf);
|
||
var buf_writer = fbs.writer();
|
||
if (data.negative) {
|
||
buf_writer.writeByte('-') catch unreachable;
|
||
}
|
||
|
||
var ns_remaining = data.ns;
|
||
inline for (.{
|
||
.{ .ns = 365 * std.time.ns_per_day, .sep = 'y' },
|
||
.{ .ns = std.time.ns_per_week, .sep = 'w' },
|
||
.{ .ns = std.time.ns_per_day, .sep = 'd' },
|
||
.{ .ns = std.time.ns_per_hour, .sep = 'h' },
|
||
.{ .ns = std.time.ns_per_min, .sep = 'm' },
|
||
}) |unit| {
|
||
if (ns_remaining >= unit.ns) {
|
||
const units = ns_remaining / unit.ns;
|
||
formatInt(units, 10, .lower, .{}, buf_writer) catch unreachable;
|
||
buf_writer.writeByte(unit.sep) catch unreachable;
|
||
ns_remaining -= units * unit.ns;
|
||
if (ns_remaining == 0)
|
||
return formatBuf(fbs.getWritten(), options, writer);
|
||
}
|
||
}
|
||
|
||
inline for (.{
|
||
.{ .ns = std.time.ns_per_s, .sep = "s" },
|
||
.{ .ns = std.time.ns_per_ms, .sep = "ms" },
|
||
.{ .ns = std.time.ns_per_us, .sep = "us" },
|
||
}) |unit| {
|
||
const kunits = ns_remaining * 1000 / unit.ns;
|
||
if (kunits >= 1000) {
|
||
formatInt(kunits / 1000, 10, .lower, .{}, buf_writer) catch unreachable;
|
||
const frac = kunits % 1000;
|
||
if (frac > 0) {
|
||
// Write up to 3 decimal places
|
||
var decimal_buf = [_]u8{ '.', 0, 0, 0 };
|
||
_ = formatIntBuf(decimal_buf[1..], frac, 10, .lower, .{ .fill = '0', .width = 3 });
|
||
var end: usize = 4;
|
||
while (end > 1) : (end -= 1) {
|
||
if (decimal_buf[end - 1] != '0') break;
|
||
}
|
||
buf_writer.writeAll(decimal_buf[0..end]) catch unreachable;
|
||
}
|
||
buf_writer.writeAll(unit.sep) catch unreachable;
|
||
return formatBuf(fbs.getWritten(), options, writer);
|
||
}
|
||
}
|
||
|
||
formatInt(ns_remaining, 10, .lower, .{}, buf_writer) catch unreachable;
|
||
buf_writer.writeAll("ns") catch unreachable;
|
||
return formatBuf(fbs.getWritten(), options, writer);
|
||
}
|
||
|
||
/// Return a Formatter for number of nanoseconds according to its magnitude:
|
||
/// [#y][#w][#d][#h][#m]#[.###][n|u|m]s
|
||
pub fn fmtDuration(ns: u64) Formatter(formatDuration) {
|
||
const data = FormatDurationData{ .ns = ns };
|
||
return .{ .data = data };
|
||
}
|
||
|
||
test "fmtDuration" {
|
||
var buf: [24]u8 = undefined;
|
||
inline for (.{
|
||
.{ .s = "0ns", .d = 0 },
|
||
.{ .s = "1ns", .d = 1 },
|
||
.{ .s = "999ns", .d = std.time.ns_per_us - 1 },
|
||
.{ .s = "1us", .d = std.time.ns_per_us },
|
||
.{ .s = "1.45us", .d = 1450 },
|
||
.{ .s = "1.5us", .d = 3 * std.time.ns_per_us / 2 },
|
||
.{ .s = "14.5us", .d = 14500 },
|
||
.{ .s = "145us", .d = 145000 },
|
||
.{ .s = "999.999us", .d = std.time.ns_per_ms - 1 },
|
||
.{ .s = "1ms", .d = std.time.ns_per_ms + 1 },
|
||
.{ .s = "1.5ms", .d = 3 * std.time.ns_per_ms / 2 },
|
||
.{ .s = "1.11ms", .d = 1110000 },
|
||
.{ .s = "1.111ms", .d = 1111000 },
|
||
.{ .s = "1.111ms", .d = 1111100 },
|
||
.{ .s = "999.999ms", .d = std.time.ns_per_s - 1 },
|
||
.{ .s = "1s", .d = std.time.ns_per_s },
|
||
.{ .s = "59.999s", .d = std.time.ns_per_min - 1 },
|
||
.{ .s = "1m", .d = std.time.ns_per_min },
|
||
.{ .s = "1h", .d = std.time.ns_per_hour },
|
||
.{ .s = "1d", .d = std.time.ns_per_day },
|
||
.{ .s = "1w", .d = std.time.ns_per_week },
|
||
.{ .s = "1y", .d = 365 * std.time.ns_per_day },
|
||
.{ .s = "1y52w23h59m59.999s", .d = 730 * std.time.ns_per_day - 1 }, // 365d = 52w1d
|
||
.{ .s = "1y1h1.001s", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_s + std.time.ns_per_ms },
|
||
.{ .s = "1y1h1s", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_s + 999 * std.time.ns_per_us },
|
||
.{ .s = "1y1h999.999us", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms - 1 },
|
||
.{ .s = "1y1h1ms", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms },
|
||
.{ .s = "1y1h1ms", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms + 1 },
|
||
.{ .s = "1y1m999ns", .d = 365 * std.time.ns_per_day + std.time.ns_per_min + 999 },
|
||
.{ .s = "584y49w23h34m33.709s", .d = math.maxInt(u64) },
|
||
}) |tc| {
|
||
const slice = try bufPrint(&buf, "{}", .{fmtDuration(tc.d)});
|
||
try std.testing.expectEqualStrings(tc.s, slice);
|
||
}
|
||
|
||
inline for (.{
|
||
.{ .s = "=======0ns", .f = "{s:=>10}", .d = 0 },
|
||
.{ .s = "1ns=======", .f = "{s:=<10}", .d = 1 },
|
||
.{ .s = " 999ns ", .f = "{s:^10}", .d = std.time.ns_per_us - 1 },
|
||
}) |tc| {
|
||
const slice = try bufPrint(&buf, tc.f, .{fmtDuration(tc.d)});
|
||
try std.testing.expectEqualStrings(tc.s, slice);
|
||
}
|
||
}
|
||
|
||
fn formatDurationSigned(ns: i64, comptime fmt: []const u8, options: std.fmt.FormatOptions, writer: anytype) !void {
|
||
if (ns < 0) {
|
||
const data = FormatDurationData{ .ns = @as(u64, @intCast(-ns)), .negative = true };
|
||
try formatDuration(data, fmt, options, writer);
|
||
} else {
|
||
const data = FormatDurationData{ .ns = @as(u64, @intCast(ns)) };
|
||
try formatDuration(data, fmt, options, writer);
|
||
}
|
||
}
|
||
|
||
/// Return a Formatter for number of nanoseconds according to its signed magnitude:
|
||
/// [#y][#w][#d][#h][#m]#[.###][n|u|m]s
|
||
pub fn fmtDurationSigned(ns: i64) Formatter(formatDurationSigned) {
|
||
return .{ .data = ns };
|
||
}
|
||
|
||
test "fmtDurationSigned" {
|
||
var buf: [24]u8 = undefined;
|
||
inline for (.{
|
||
.{ .s = "0ns", .d = 0 },
|
||
.{ .s = "1ns", .d = 1 },
|
||
.{ .s = "-1ns", .d = -(1) },
|
||
.{ .s = "999ns", .d = std.time.ns_per_us - 1 },
|
||
.{ .s = "-999ns", .d = -(std.time.ns_per_us - 1) },
|
||
.{ .s = "1us", .d = std.time.ns_per_us },
|
||
.{ .s = "-1us", .d = -(std.time.ns_per_us) },
|
||
.{ .s = "1.45us", .d = 1450 },
|
||
.{ .s = "-1.45us", .d = -(1450) },
|
||
.{ .s = "1.5us", .d = 3 * std.time.ns_per_us / 2 },
|
||
.{ .s = "-1.5us", .d = -(3 * std.time.ns_per_us / 2) },
|
||
.{ .s = "14.5us", .d = 14500 },
|
||
.{ .s = "-14.5us", .d = -(14500) },
|
||
.{ .s = "145us", .d = 145000 },
|
||
.{ .s = "-145us", .d = -(145000) },
|
||
.{ .s = "999.999us", .d = std.time.ns_per_ms - 1 },
|
||
.{ .s = "-999.999us", .d = -(std.time.ns_per_ms - 1) },
|
||
.{ .s = "1ms", .d = std.time.ns_per_ms + 1 },
|
||
.{ .s = "-1ms", .d = -(std.time.ns_per_ms + 1) },
|
||
.{ .s = "1.5ms", .d = 3 * std.time.ns_per_ms / 2 },
|
||
.{ .s = "-1.5ms", .d = -(3 * std.time.ns_per_ms / 2) },
|
||
.{ .s = "1.11ms", .d = 1110000 },
|
||
.{ .s = "-1.11ms", .d = -(1110000) },
|
||
.{ .s = "1.111ms", .d = 1111000 },
|
||
.{ .s = "-1.111ms", .d = -(1111000) },
|
||
.{ .s = "1.111ms", .d = 1111100 },
|
||
.{ .s = "-1.111ms", .d = -(1111100) },
|
||
.{ .s = "999.999ms", .d = std.time.ns_per_s - 1 },
|
||
.{ .s = "-999.999ms", .d = -(std.time.ns_per_s - 1) },
|
||
.{ .s = "1s", .d = std.time.ns_per_s },
|
||
.{ .s = "-1s", .d = -(std.time.ns_per_s) },
|
||
.{ .s = "59.999s", .d = std.time.ns_per_min - 1 },
|
||
.{ .s = "-59.999s", .d = -(std.time.ns_per_min - 1) },
|
||
.{ .s = "1m", .d = std.time.ns_per_min },
|
||
.{ .s = "-1m", .d = -(std.time.ns_per_min) },
|
||
.{ .s = "1h", .d = std.time.ns_per_hour },
|
||
.{ .s = "-1h", .d = -(std.time.ns_per_hour) },
|
||
.{ .s = "1d", .d = std.time.ns_per_day },
|
||
.{ .s = "-1d", .d = -(std.time.ns_per_day) },
|
||
.{ .s = "1w", .d = std.time.ns_per_week },
|
||
.{ .s = "-1w", .d = -(std.time.ns_per_week) },
|
||
.{ .s = "1y", .d = 365 * std.time.ns_per_day },
|
||
.{ .s = "-1y", .d = -(365 * std.time.ns_per_day) },
|
||
.{ .s = "1y52w23h59m59.999s", .d = 730 * std.time.ns_per_day - 1 }, // 365d = 52w1d
|
||
.{ .s = "-1y52w23h59m59.999s", .d = -(730 * std.time.ns_per_day - 1) }, // 365d = 52w1d
|
||
.{ .s = "1y1h1.001s", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_s + std.time.ns_per_ms },
|
||
.{ .s = "-1y1h1.001s", .d = -(365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_s + std.time.ns_per_ms) },
|
||
.{ .s = "1y1h1s", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_s + 999 * std.time.ns_per_us },
|
||
.{ .s = "-1y1h1s", .d = -(365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_s + 999 * std.time.ns_per_us) },
|
||
.{ .s = "1y1h999.999us", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms - 1 },
|
||
.{ .s = "-1y1h999.999us", .d = -(365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms - 1) },
|
||
.{ .s = "1y1h1ms", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms },
|
||
.{ .s = "-1y1h1ms", .d = -(365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms) },
|
||
.{ .s = "1y1h1ms", .d = 365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms + 1 },
|
||
.{ .s = "-1y1h1ms", .d = -(365 * std.time.ns_per_day + std.time.ns_per_hour + std.time.ns_per_ms + 1) },
|
||
.{ .s = "1y1m999ns", .d = 365 * std.time.ns_per_day + std.time.ns_per_min + 999 },
|
||
.{ .s = "-1y1m999ns", .d = -(365 * std.time.ns_per_day + std.time.ns_per_min + 999) },
|
||
.{ .s = "292y24w3d23h47m16.854s", .d = math.maxInt(i64) },
|
||
.{ .s = "-292y24w3d23h47m16.854s", .d = math.minInt(i64) + 1 },
|
||
}) |tc| {
|
||
const slice = try bufPrint(&buf, "{}", .{fmtDurationSigned(tc.d)});
|
||
try std.testing.expectEqualStrings(tc.s, slice);
|
||
}
|
||
|
||
inline for (.{
|
||
.{ .s = "=======0ns", .f = "{s:=>10}", .d = 0 },
|
||
.{ .s = "1ns=======", .f = "{s:=<10}", .d = 1 },
|
||
.{ .s = "-1ns======", .f = "{s:=<10}", .d = -(1) },
|
||
.{ .s = " -999ns ", .f = "{s:^10}", .d = -(std.time.ns_per_us - 1) },
|
||
}) |tc| {
|
||
const slice = try bufPrint(&buf, tc.f, .{fmtDurationSigned(tc.d)});
|
||
try std.testing.expectEqualStrings(tc.s, slice);
|
||
}
|
||
}
|
||
|
||
pub const ParseIntError = error{
|
||
/// The result cannot fit in the type specified
|
||
Overflow,
|
||
|
||
/// The input was empty or contained an invalid character
|
||
InvalidCharacter,
|
||
};
|
||
|
||
/// Creates a Formatter type from a format function. Wrapping data in Formatter(func) causes
|
||
/// the data to be formatted using the given function `func`. `func` must be of the following
|
||
/// form:
|
||
///
|
||
/// fn formatExample(
|
||
/// data: T,
|
||
/// comptime fmt: []const u8,
|
||
/// options: std.fmt.FormatOptions,
|
||
/// writer: anytype,
|
||
/// ) !void;
|
||
///
|
||
pub fn Formatter(comptime format_fn: anytype) type {
|
||
const Data = @typeInfo(@TypeOf(format_fn)).Fn.params[0].type.?;
|
||
return struct {
|
||
data: Data,
|
||
pub fn format(
|
||
self: @This(),
|
||
comptime fmt: []const u8,
|
||
options: std.fmt.FormatOptions,
|
||
writer: anytype,
|
||
) @TypeOf(writer).Error!void {
|
||
try format_fn(self.data, fmt, options, writer);
|
||
}
|
||
};
|
||
}
|
||
|
||
/// Parses the string `buf` as signed or unsigned representation in the
|
||
/// specified base of an integral value of type `T`.
|
||
///
|
||
/// When `base` is zero the string prefix is examined to detect the true base:
|
||
/// * A prefix of "0b" implies base=2,
|
||
/// * A prefix of "0o" implies base=8,
|
||
/// * A prefix of "0x" implies base=16,
|
||
/// * Otherwise base=10 is assumed.
|
||
///
|
||
/// Ignores '_' character in `buf`.
|
||
/// See also `parseUnsigned`.
|
||
pub fn parseInt(comptime T: type, buf: []const u8, base: u8) ParseIntError!T {
|
||
if (buf.len == 0) return error.InvalidCharacter;
|
||
if (buf[0] == '+') return parseWithSign(T, buf[1..], base, .pos);
|
||
if (buf[0] == '-') return parseWithSign(T, buf[1..], base, .neg);
|
||
return parseWithSign(T, buf, base, .pos);
|
||
}
|
||
|
||
test "parseInt" {
|
||
try std.testing.expect((try parseInt(i32, "-10", 10)) == -10);
|
||
try std.testing.expect((try parseInt(i32, "+10", 10)) == 10);
|
||
try std.testing.expect((try parseInt(u32, "+10", 10)) == 10);
|
||
try std.testing.expectError(error.Overflow, parseInt(u32, "-10", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, " 10", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "10 ", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "_10_", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "0x_10_", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "0x10_", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "0x_10", 10));
|
||
try std.testing.expect((try parseInt(u8, "255", 10)) == 255);
|
||
try std.testing.expectError(error.Overflow, parseInt(u8, "256", 10));
|
||
|
||
// +0 and -0 should work for unsigned
|
||
try std.testing.expect((try parseInt(u8, "-0", 10)) == 0);
|
||
try std.testing.expect((try parseInt(u8, "+0", 10)) == 0);
|
||
|
||
// ensure minInt is parsed correctly
|
||
try std.testing.expect((try parseInt(i1, "-1", 10)) == math.minInt(i1));
|
||
try std.testing.expect((try parseInt(i8, "-128", 10)) == math.minInt(i8));
|
||
try std.testing.expect((try parseInt(i43, "-4398046511104", 10)) == math.minInt(i43));
|
||
|
||
// empty string or bare +- is invalid
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(i32, "", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "+", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(i32, "+", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "-", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(i32, "-", 10));
|
||
|
||
// autodectect the base
|
||
try std.testing.expect((try parseInt(i32, "111", 0)) == 111);
|
||
try std.testing.expect((try parseInt(i32, "1_1_1", 0)) == 111);
|
||
try std.testing.expect((try parseInt(i32, "1_1_1", 0)) == 111);
|
||
try std.testing.expect((try parseInt(i32, "+0b111", 0)) == 7);
|
||
try std.testing.expect((try parseInt(i32, "+0B111", 0)) == 7);
|
||
try std.testing.expect((try parseInt(i32, "+0b1_11", 0)) == 7);
|
||
try std.testing.expect((try parseInt(i32, "+0o111", 0)) == 73);
|
||
try std.testing.expect((try parseInt(i32, "+0O111", 0)) == 73);
|
||
try std.testing.expect((try parseInt(i32, "+0o11_1", 0)) == 73);
|
||
try std.testing.expect((try parseInt(i32, "+0x111", 0)) == 273);
|
||
try std.testing.expect((try parseInt(i32, "-0b111", 0)) == -7);
|
||
try std.testing.expect((try parseInt(i32, "-0b11_1", 0)) == -7);
|
||
try std.testing.expect((try parseInt(i32, "-0o111", 0)) == -73);
|
||
try std.testing.expect((try parseInt(i32, "-0x111", 0)) == -273);
|
||
try std.testing.expect((try parseInt(i32, "-0X111", 0)) == -273);
|
||
try std.testing.expect((try parseInt(i32, "-0x1_11", 0)) == -273);
|
||
|
||
// bare binary/octal/decimal prefix is invalid
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "0b", 0));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "0o", 0));
|
||
try std.testing.expectError(error.InvalidCharacter, parseInt(u32, "0x", 0));
|
||
}
|
||
|
||
fn parseWithSign(
|
||
comptime T: type,
|
||
buf: []const u8,
|
||
base: u8,
|
||
comptime sign: enum { pos, neg },
|
||
) ParseIntError!T {
|
||
if (buf.len == 0) return error.InvalidCharacter;
|
||
|
||
var buf_base = base;
|
||
var buf_start = buf;
|
||
if (base == 0) {
|
||
// Treat is as a decimal number by default.
|
||
buf_base = 10;
|
||
// Detect the base by looking at buf prefix.
|
||
if (buf.len > 2 and buf[0] == '0') {
|
||
switch (std.ascii.toLower(buf[1])) {
|
||
'b' => {
|
||
buf_base = 2;
|
||
buf_start = buf[2..];
|
||
},
|
||
'o' => {
|
||
buf_base = 8;
|
||
buf_start = buf[2..];
|
||
},
|
||
'x' => {
|
||
buf_base = 16;
|
||
buf_start = buf[2..];
|
||
},
|
||
else => {},
|
||
}
|
||
}
|
||
}
|
||
|
||
const add = switch (sign) {
|
||
.pos => math.add,
|
||
.neg => math.sub,
|
||
};
|
||
|
||
var x: T = 0;
|
||
|
||
if (buf_start[0] == '_' or buf_start[buf_start.len - 1] == '_') return error.InvalidCharacter;
|
||
|
||
for (buf_start) |c| {
|
||
if (c == '_') continue;
|
||
const digit = try charToDigit(c, buf_base);
|
||
|
||
if (x != 0) {
|
||
x = try math.mul(T, x, math.cast(T, buf_base) orelse return error.Overflow);
|
||
} else if (sign == .neg) {
|
||
// The first digit of a negative number.
|
||
// Consider parsing "-4" as an i3.
|
||
// This should work, but positive 4 overflows i3, so we can't cast the digit to T and subtract.
|
||
x = math.cast(T, -@as(i8, @intCast(digit))) orelse return error.Overflow;
|
||
continue;
|
||
}
|
||
x = try add(T, x, math.cast(T, digit) orelse return error.Overflow);
|
||
}
|
||
|
||
return x;
|
||
}
|
||
|
||
/// Parses the string `buf` as unsigned representation in the specified base
|
||
/// of an integral value of type `T`.
|
||
///
|
||
/// When `base` is zero the string prefix is examined to detect the true base:
|
||
/// * A prefix of "0b" implies base=2,
|
||
/// * A prefix of "0o" implies base=8,
|
||
/// * A prefix of "0x" implies base=16,
|
||
/// * Otherwise base=10 is assumed.
|
||
///
|
||
/// Ignores '_' character in `buf`.
|
||
/// See also `parseInt`.
|
||
pub fn parseUnsigned(comptime T: type, buf: []const u8, base: u8) ParseIntError!T {
|
||
return parseWithSign(T, buf, base, .pos);
|
||
}
|
||
|
||
test "parseUnsigned" {
|
||
try std.testing.expect((try parseUnsigned(u16, "050124", 10)) == 50124);
|
||
try std.testing.expect((try parseUnsigned(u16, "65535", 10)) == 65535);
|
||
try std.testing.expect((try parseUnsigned(u16, "65_535", 10)) == 65535);
|
||
try std.testing.expectError(error.Overflow, parseUnsigned(u16, "65536", 10));
|
||
|
||
try std.testing.expect((try parseUnsigned(u64, "0ffffffffffffffff", 16)) == 0xffffffffffffffff);
|
||
try std.testing.expect((try parseUnsigned(u64, "0f_fff_fff_fff_fff_fff", 16)) == 0xffffffffffffffff);
|
||
try std.testing.expectError(error.Overflow, parseUnsigned(u64, "10000000000000000", 16));
|
||
|
||
try std.testing.expect((try parseUnsigned(u32, "DeadBeef", 16)) == 0xDEADBEEF);
|
||
|
||
try std.testing.expect((try parseUnsigned(u7, "1", 10)) == 1);
|
||
try std.testing.expect((try parseUnsigned(u7, "1000", 2)) == 8);
|
||
|
||
try std.testing.expectError(error.InvalidCharacter, parseUnsigned(u32, "f", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseUnsigned(u8, "109", 8));
|
||
|
||
try std.testing.expect((try parseUnsigned(u32, "NUMBER", 36)) == 1442151747);
|
||
|
||
// these numbers should fit even though the base itself doesn't fit in the destination type
|
||
try std.testing.expect((try parseUnsigned(u1, "0", 10)) == 0);
|
||
try std.testing.expect((try parseUnsigned(u1, "1", 10)) == 1);
|
||
try std.testing.expectError(error.Overflow, parseUnsigned(u1, "2", 10));
|
||
try std.testing.expect((try parseUnsigned(u1, "001", 16)) == 1);
|
||
try std.testing.expect((try parseUnsigned(u2, "3", 16)) == 3);
|
||
try std.testing.expectError(error.Overflow, parseUnsigned(u2, "4", 16));
|
||
|
||
// parseUnsigned does not expect a sign
|
||
try std.testing.expectError(error.InvalidCharacter, parseUnsigned(u8, "+0", 10));
|
||
try std.testing.expectError(error.InvalidCharacter, parseUnsigned(u8, "-0", 10));
|
||
|
||
// test empty string error
|
||
try std.testing.expectError(error.InvalidCharacter, parseUnsigned(u8, "", 10));
|
||
}
|
||
|
||
/// Parses a number like '2G', '2Gi', or '2GiB'.
|
||
pub fn parseIntSizeSuffix(buf: []const u8, digit_base: u8) ParseIntError!usize {
|
||
var without_B = buf;
|
||
if (mem.endsWith(u8, buf, "B")) without_B.len -= 1;
|
||
var without_i = without_B;
|
||
var magnitude_base: usize = 1000;
|
||
if (mem.endsWith(u8, without_B, "i")) {
|
||
without_i.len -= 1;
|
||
magnitude_base = 1024;
|
||
}
|
||
if (without_i.len == 0) return error.InvalidCharacter;
|
||
const orders_of_magnitude: usize = switch (without_i[without_i.len - 1]) {
|
||
'k', 'K' => 1,
|
||
'M' => 2,
|
||
'G' => 3,
|
||
'T' => 4,
|
||
'P' => 5,
|
||
'E' => 6,
|
||
'Z' => 7,
|
||
'Y' => 8,
|
||
'R' => 9,
|
||
'Q' => 10,
|
||
else => 0,
|
||
};
|
||
var without_suffix = without_i;
|
||
if (orders_of_magnitude > 0) {
|
||
without_suffix.len -= 1;
|
||
} else if (without_i.len != without_B.len) {
|
||
return error.InvalidCharacter;
|
||
}
|
||
const multiplier = math.powi(usize, magnitude_base, orders_of_magnitude) catch |err| switch (err) {
|
||
error.Underflow => unreachable,
|
||
error.Overflow => return error.Overflow,
|
||
};
|
||
const number = try std.fmt.parseInt(usize, without_suffix, digit_base);
|
||
return math.mul(usize, number, multiplier);
|
||
}
|
||
|
||
test "parseIntSizeSuffix" {
|
||
try std.testing.expect(try parseIntSizeSuffix("2", 10) == 2);
|
||
try std.testing.expect(try parseIntSizeSuffix("2B", 10) == 2);
|
||
try std.testing.expect(try parseIntSizeSuffix("2kB", 10) == 2000);
|
||
try std.testing.expect(try parseIntSizeSuffix("2k", 10) == 2000);
|
||
try std.testing.expect(try parseIntSizeSuffix("2KiB", 10) == 2048);
|
||
try std.testing.expect(try parseIntSizeSuffix("2Ki", 10) == 2048);
|
||
try std.testing.expect(try parseIntSizeSuffix("aKiB", 16) == 10240);
|
||
try std.testing.expect(parseIntSizeSuffix("", 10) == error.InvalidCharacter);
|
||
try std.testing.expect(parseIntSizeSuffix("2iB", 10) == error.InvalidCharacter);
|
||
}
|
||
|
||
pub const parseFloat = @import("fmt/parse_float.zig").parseFloat;
|
||
pub const ParseFloatError = @import("fmt/parse_float.zig").ParseFloatError;
|
||
|
||
test {
|
||
_ = &parseFloat;
|
||
}
|
||
|
||
pub fn charToDigit(c: u8, base: u8) (error{InvalidCharacter}!u8) {
|
||
const value = switch (c) {
|
||
'0'...'9' => c - '0',
|
||
'A'...'Z' => c - 'A' + 10,
|
||
'a'...'z' => c - 'a' + 10,
|
||
else => return error.InvalidCharacter,
|
||
};
|
||
|
||
if (value >= base) return error.InvalidCharacter;
|
||
|
||
return value;
|
||
}
|
||
|
||
pub fn digitToChar(digit: u8, case: Case) u8 {
|
||
return switch (digit) {
|
||
0...9 => digit + '0',
|
||
10...35 => digit + ((if (case == .upper) @as(u8, 'A') else @as(u8, 'a')) - 10),
|
||
else => unreachable,
|
||
};
|
||
}
|
||
|
||
pub const BufPrintError = error{
|
||
/// As much as possible was written to the buffer, but it was too small to fit all the printed bytes.
|
||
NoSpaceLeft,
|
||
};
|
||
|
||
/// print a Formatter string into `buf`. Actually just a thin wrapper around `format` and `fixedBufferStream`.
|
||
/// returns a slice of the bytes printed to.
|
||
pub fn bufPrint(buf: []u8, comptime fmt: []const u8, args: anytype) BufPrintError![]u8 {
|
||
var fbs = std.io.fixedBufferStream(buf);
|
||
try format(fbs.writer(), fmt, args);
|
||
return fbs.getWritten();
|
||
}
|
||
|
||
pub fn bufPrintZ(buf: []u8, comptime fmt: []const u8, args: anytype) BufPrintError![:0]u8 {
|
||
const result = try bufPrint(buf, fmt ++ "\x00", args);
|
||
return result[0 .. result.len - 1 :0];
|
||
}
|
||
|
||
/// Count the characters needed for format. Useful for preallocating memory
|
||
pub fn count(comptime fmt: []const u8, args: anytype) u64 {
|
||
var counting_writer = std.io.countingWriter(std.io.null_writer);
|
||
format(counting_writer.writer(), fmt, args) catch |err| switch (err) {};
|
||
return counting_writer.bytes_written;
|
||
}
|
||
|
||
pub const AllocPrintError = error{OutOfMemory};
|
||
|
||
pub fn allocPrint(allocator: mem.Allocator, comptime fmt: []const u8, args: anytype) AllocPrintError![]u8 {
|
||
const size = math.cast(usize, count(fmt, args)) orelse return error.OutOfMemory;
|
||
const buf = try allocator.alloc(u8, size);
|
||
return bufPrint(buf, fmt, args) catch |err| switch (err) {
|
||
error.NoSpaceLeft => unreachable, // we just counted the size above
|
||
};
|
||
}
|
||
|
||
pub fn allocPrintZ(allocator: mem.Allocator, comptime fmt: []const u8, args: anytype) AllocPrintError![:0]u8 {
|
||
const result = try allocPrint(allocator, fmt ++ "\x00", args);
|
||
return result[0 .. result.len - 1 :0];
|
||
}
|
||
|
||
test "bufPrintInt" {
|
||
var buffer: [100]u8 = undefined;
|
||
const buf = buffer[0..];
|
||
|
||
try std.testing.expectEqualSlices(u8, "-1", bufPrintIntToSlice(buf, @as(i1, -1), 10, .lower, FormatOptions{}));
|
||
|
||
try std.testing.expectEqualSlices(u8, "-101111000110000101001110", bufPrintIntToSlice(buf, @as(i32, -12345678), 2, .lower, FormatOptions{}));
|
||
try std.testing.expectEqualSlices(u8, "-12345678", bufPrintIntToSlice(buf, @as(i32, -12345678), 10, .lower, FormatOptions{}));
|
||
try std.testing.expectEqualSlices(u8, "-bc614e", bufPrintIntToSlice(buf, @as(i32, -12345678), 16, .lower, FormatOptions{}));
|
||
try std.testing.expectEqualSlices(u8, "-BC614E", bufPrintIntToSlice(buf, @as(i32, -12345678), 16, .upper, FormatOptions{}));
|
||
|
||
try std.testing.expectEqualSlices(u8, "12345678", bufPrintIntToSlice(buf, @as(u32, 12345678), 10, .upper, FormatOptions{}));
|
||
|
||
try std.testing.expectEqualSlices(u8, " 666", bufPrintIntToSlice(buf, @as(u32, 666), 10, .lower, FormatOptions{ .width = 6 }));
|
||
try std.testing.expectEqualSlices(u8, " 1234", bufPrintIntToSlice(buf, @as(u32, 0x1234), 16, .lower, FormatOptions{ .width = 6 }));
|
||
try std.testing.expectEqualSlices(u8, "1234", bufPrintIntToSlice(buf, @as(u32, 0x1234), 16, .lower, FormatOptions{ .width = 1 }));
|
||
|
||
try std.testing.expectEqualSlices(u8, "+42", bufPrintIntToSlice(buf, @as(i32, 42), 10, .lower, FormatOptions{ .width = 3 }));
|
||
try std.testing.expectEqualSlices(u8, "-42", bufPrintIntToSlice(buf, @as(i32, -42), 10, .lower, FormatOptions{ .width = 3 }));
|
||
}
|
||
|
||
pub fn bufPrintIntToSlice(buf: []u8, value: anytype, base: u8, case: Case, options: FormatOptions) []u8 {
|
||
return buf[0..formatIntBuf(buf, value, base, case, options)];
|
||
}
|
||
|
||
pub inline fn comptimePrint(comptime fmt: []const u8, args: anytype) *const [count(fmt, args):0]u8 {
|
||
comptime {
|
||
var buf: [count(fmt, args):0]u8 = undefined;
|
||
_ = bufPrint(&buf, fmt, args) catch unreachable;
|
||
buf[buf.len] = 0;
|
||
return &buf;
|
||
}
|
||
}
|
||
|
||
test "comptimePrint" {
|
||
@setEvalBranchQuota(2000);
|
||
try std.testing.expectEqual(*const [3:0]u8, @TypeOf(comptimePrint("{}", .{100})));
|
||
try std.testing.expectEqualSlices(u8, "100", comptimePrint("{}", .{100}));
|
||
}
|
||
|
||
test "parse u64 digit too big" {
|
||
_ = parseUnsigned(u64, "123a", 10) catch |err| {
|
||
if (err == error.InvalidCharacter) return;
|
||
unreachable;
|
||
};
|
||
unreachable;
|
||
}
|
||
|
||
test "parse unsigned comptime" {
|
||
comptime {
|
||
try std.testing.expect((try parseUnsigned(usize, "2", 10)) == 2);
|
||
}
|
||
}
|
||
|
||
test "escaped braces" {
|
||
try expectFmt("escaped: {{foo}}\n", "escaped: {{{{foo}}}}\n", .{});
|
||
try expectFmt("escaped: {foo}\n", "escaped: {{foo}}\n", .{});
|
||
}
|
||
|
||
test "optional" {
|
||
{
|
||
const value: ?i32 = 1234;
|
||
try expectFmt("optional: 1234\n", "optional: {?}\n", .{value});
|
||
try expectFmt("optional: 1234\n", "optional: {?d}\n", .{value});
|
||
try expectFmt("optional: 4d2\n", "optional: {?x}\n", .{value});
|
||
}
|
||
{
|
||
const value: ?[]const u8 = "string";
|
||
try expectFmt("optional: string\n", "optional: {?s}\n", .{value});
|
||
}
|
||
{
|
||
const value: ?i32 = null;
|
||
try expectFmt("optional: null\n", "optional: {?}\n", .{value});
|
||
}
|
||
{
|
||
const value = @as(?*i32, @ptrFromInt(0xf000d000));
|
||
try expectFmt("optional: *i32@f000d000\n", "optional: {*}\n", .{value});
|
||
}
|
||
}
|
||
|
||
test "error" {
|
||
{
|
||
const value: anyerror!i32 = 1234;
|
||
try expectFmt("error union: 1234\n", "error union: {!}\n", .{value});
|
||
try expectFmt("error union: 1234\n", "error union: {!d}\n", .{value});
|
||
try expectFmt("error union: 4d2\n", "error union: {!x}\n", .{value});
|
||
}
|
||
{
|
||
const value: anyerror![]const u8 = "string";
|
||
try expectFmt("error union: string\n", "error union: {!s}\n", .{value});
|
||
}
|
||
{
|
||
const value: anyerror!i32 = error.InvalidChar;
|
||
try expectFmt("error union: error.InvalidChar\n", "error union: {!}\n", .{value});
|
||
}
|
||
}
|
||
|
||
test "int.small" {
|
||
{
|
||
const value: u3 = 0b101;
|
||
try expectFmt("u3: 5\n", "u3: {}\n", .{value});
|
||
}
|
||
}
|
||
|
||
test "int.specifier" {
|
||
{
|
||
const value: u8 = 'a';
|
||
try expectFmt("u8: a\n", "u8: {c}\n", .{value});
|
||
}
|
||
{
|
||
const value: u8 = 0b1100;
|
||
try expectFmt("u8: 0b1100\n", "u8: 0b{b}\n", .{value});
|
||
}
|
||
{
|
||
const value: u16 = 0o1234;
|
||
try expectFmt("u16: 0o1234\n", "u16: 0o{o}\n", .{value});
|
||
}
|
||
{
|
||
const value: u8 = 'a';
|
||
try expectFmt("UTF-8: a\n", "UTF-8: {u}\n", .{value});
|
||
}
|
||
{
|
||
const value: u21 = 0x1F310;
|
||
try expectFmt("UTF-8: 🌐\n", "UTF-8: {u}\n", .{value});
|
||
}
|
||
{
|
||
const value: u21 = 0xD800;
|
||
try expectFmt("UTF-8: <20>\n", "UTF-8: {u}\n", .{value});
|
||
}
|
||
{
|
||
const value: u21 = 0x110001;
|
||
try expectFmt("UTF-8: <20>\n", "UTF-8: {u}\n", .{value});
|
||
}
|
||
}
|
||
|
||
test "int.padded" {
|
||
try expectFmt("u8: ' 1'", "u8: '{:4}'", .{@as(u8, 1)});
|
||
try expectFmt("u8: '1000'", "u8: '{:0<4}'", .{@as(u8, 1)});
|
||
try expectFmt("u8: '0001'", "u8: '{:0>4}'", .{@as(u8, 1)});
|
||
try expectFmt("u8: '0100'", "u8: '{:0^4}'", .{@as(u8, 1)});
|
||
try expectFmt("i8: '-1 '", "i8: '{:<4}'", .{@as(i8, -1)});
|
||
try expectFmt("i8: ' -1'", "i8: '{:>4}'", .{@as(i8, -1)});
|
||
try expectFmt("i8: ' -1 '", "i8: '{:^4}'", .{@as(i8, -1)});
|
||
try expectFmt("i16: '-1234'", "i16: '{:4}'", .{@as(i16, -1234)});
|
||
try expectFmt("i16: '+1234'", "i16: '{:4}'", .{@as(i16, 1234)});
|
||
try expectFmt("i16: '-12345'", "i16: '{:4}'", .{@as(i16, -12345)});
|
||
try expectFmt("i16: '+12345'", "i16: '{:4}'", .{@as(i16, 12345)});
|
||
try expectFmt("u16: '12345'", "u16: '{:4}'", .{@as(u16, 12345)});
|
||
|
||
try expectFmt("UTF-8: 'ü '", "UTF-8: '{u:<4}'", .{'ü'});
|
||
try expectFmt("UTF-8: ' ü'", "UTF-8: '{u:>4}'", .{'ü'});
|
||
try expectFmt("UTF-8: ' ü '", "UTF-8: '{u:^4}'", .{'ü'});
|
||
}
|
||
|
||
test "buffer" {
|
||
{
|
||
var buf1: [32]u8 = undefined;
|
||
var fbs = std.io.fixedBufferStream(&buf1);
|
||
try formatType(1234, "", FormatOptions{}, fbs.writer(), std.options.fmt_max_depth);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "1234"));
|
||
|
||
fbs.reset();
|
||
try formatType('a', "c", FormatOptions{}, fbs.writer(), std.options.fmt_max_depth);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "a"));
|
||
|
||
fbs.reset();
|
||
try formatType(0b1100, "b", FormatOptions{}, fbs.writer(), std.options.fmt_max_depth);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "1100"));
|
||
}
|
||
}
|
||
|
||
test "array" {
|
||
{
|
||
const value: [3]u8 = "abc".*;
|
||
try expectFmt("array: abc\n", "array: {s}\n", .{value});
|
||
try expectFmt("array: abc\n", "array: {s}\n", .{&value});
|
||
try expectFmt("array: { 97, 98, 99 }\n", "array: {d}\n", .{value});
|
||
|
||
var buf: [100]u8 = undefined;
|
||
try expectFmt(
|
||
try bufPrint(buf[0..], "array: [3]u8@{x}\n", .{@intFromPtr(&value)}),
|
||
"array: {*}\n",
|
||
.{&value},
|
||
);
|
||
}
|
||
}
|
||
|
||
test "slice" {
|
||
{
|
||
const value: []const u8 = "abc";
|
||
try expectFmt("slice: abc\n", "slice: {s}\n", .{value});
|
||
}
|
||
{
|
||
var runtime_zero: usize = 0;
|
||
const value = @as([*]align(1) const []const u8, @ptrFromInt(0xdeadbeef))[runtime_zero..runtime_zero];
|
||
try expectFmt("slice: []const u8@deadbeef\n", "slice: {*}\n", .{value});
|
||
}
|
||
{
|
||
const null_term_slice: [:0]const u8 = "\x00hello\x00";
|
||
try expectFmt("buf: \x00hello\x00\n", "buf: {s}\n", .{null_term_slice});
|
||
}
|
||
|
||
try expectFmt("buf: Test\n", "buf: {s:5}\n", .{"Test"});
|
||
try expectFmt("buf: Test\n Other text", "buf: {s}\n Other text", .{"Test"});
|
||
|
||
{
|
||
var int_slice = [_]u32{ 1, 4096, 391891, 1111111111 };
|
||
var runtime_zero: usize = 0;
|
||
try expectFmt("int: { 1, 4096, 391891, 1111111111 }", "int: {any}", .{int_slice[runtime_zero..]});
|
||
try expectFmt("int: { 1, 4096, 391891, 1111111111 }", "int: {d}", .{int_slice[runtime_zero..]});
|
||
try expectFmt("int: { 1, 1000, 5fad3, 423a35c7 }", "int: {x}", .{int_slice[runtime_zero..]});
|
||
try expectFmt("int: { 00001, 01000, 5fad3, 423a35c7 }", "int: {x:0>5}", .{int_slice[runtime_zero..]});
|
||
}
|
||
}
|
||
|
||
test "escape non-printable" {
|
||
try expectFmt("abc 123", "{s}", .{fmtSliceEscapeLower("abc 123")});
|
||
try expectFmt("ab\\xffc", "{s}", .{fmtSliceEscapeLower("ab\xffc")});
|
||
try expectFmt("abc 123", "{s}", .{fmtSliceEscapeUpper("abc 123")});
|
||
try expectFmt("ab\\xFFc", "{s}", .{fmtSliceEscapeUpper("ab\xffc")});
|
||
}
|
||
|
||
test "pointer" {
|
||
{
|
||
const value = @as(*align(1) i32, @ptrFromInt(0xdeadbeef));
|
||
try expectFmt("pointer: i32@deadbeef\n", "pointer: {}\n", .{value});
|
||
try expectFmt("pointer: i32@deadbeef\n", "pointer: {*}\n", .{value});
|
||
}
|
||
const FnPtr = *align(1) const fn () void;
|
||
{
|
||
const value = @as(FnPtr, @ptrFromInt(0xdeadbeef));
|
||
try expectFmt("pointer: fn() void@deadbeef\n", "pointer: {}\n", .{value});
|
||
}
|
||
{
|
||
const value = @as(FnPtr, @ptrFromInt(0xdeadbeef));
|
||
try expectFmt("pointer: fn() void@deadbeef\n", "pointer: {}\n", .{value});
|
||
}
|
||
}
|
||
|
||
test "cstr" {
|
||
try expectFmt(
|
||
"cstr: Test C\n",
|
||
"cstr: {s}\n",
|
||
.{@as([*c]const u8, @ptrCast("Test C"))},
|
||
);
|
||
try expectFmt(
|
||
"cstr: Test C\n",
|
||
"cstr: {s:10}\n",
|
||
.{@as([*c]const u8, @ptrCast("Test C"))},
|
||
);
|
||
}
|
||
|
||
test "filesize" {
|
||
try expectFmt("file size: 42B\n", "file size: {}\n", .{fmtIntSizeDec(42)});
|
||
try expectFmt("file size: 42B\n", "file size: {}\n", .{fmtIntSizeBin(42)});
|
||
try expectFmt("file size: 63MB\n", "file size: {}\n", .{fmtIntSizeDec(63 * 1000 * 1000)});
|
||
try expectFmt("file size: 63MiB\n", "file size: {}\n", .{fmtIntSizeBin(63 * 1024 * 1024)});
|
||
try expectFmt("file size: 66.06MB\n", "file size: {:.2}\n", .{fmtIntSizeDec(63 * 1024 * 1024)});
|
||
try expectFmt("file size: 60.08MiB\n", "file size: {:.2}\n", .{fmtIntSizeBin(63 * 1000 * 1000)});
|
||
try expectFmt("file size: =66.06MB=\n", "file size: {:=^9.2}\n", .{fmtIntSizeDec(63 * 1024 * 1024)});
|
||
try expectFmt("file size: 66.06MB\n", "file size: {: >9.2}\n", .{fmtIntSizeDec(63 * 1024 * 1024)});
|
||
try expectFmt("file size: 66.06MB \n", "file size: {: <9.2}\n", .{fmtIntSizeDec(63 * 1024 * 1024)});
|
||
try expectFmt("file size: 0.01844674407370955ZB\n", "file size: {}\n", .{fmtIntSizeDec(math.maxInt(u64))});
|
||
}
|
||
|
||
test "struct" {
|
||
{
|
||
const Struct = struct {
|
||
field: u8,
|
||
};
|
||
const value = Struct{ .field = 42 };
|
||
try expectFmt("struct: fmt.test.struct.Struct{ .field = 42 }\n", "struct: {}\n", .{value});
|
||
try expectFmt("struct: fmt.test.struct.Struct{ .field = 42 }\n", "struct: {}\n", .{&value});
|
||
}
|
||
{
|
||
const Struct = struct {
|
||
a: u0,
|
||
b: u1,
|
||
};
|
||
const value = Struct{ .a = 0, .b = 1 };
|
||
try expectFmt("struct: fmt.test.struct.Struct{ .a = 0, .b = 1 }\n", "struct: {}\n", .{value});
|
||
}
|
||
|
||
const S = struct {
|
||
a: u32,
|
||
b: anyerror,
|
||
};
|
||
|
||
const inst = S{
|
||
.a = 456,
|
||
.b = error.Unused,
|
||
};
|
||
|
||
try expectFmt("fmt.test.struct.S{ .a = 456, .b = error.Unused }", "{}", .{inst});
|
||
// Tuples
|
||
try expectFmt("{ }", "{}", .{.{}});
|
||
try expectFmt("{ -1 }", "{}", .{.{-1}});
|
||
try expectFmt("{ -1, 42, 2.5e+04 }", "{}", .{.{ -1, 42, 0.25e5 }});
|
||
}
|
||
|
||
test "enum" {
|
||
const Enum = enum {
|
||
One,
|
||
Two,
|
||
};
|
||
const value = Enum.Two;
|
||
try expectFmt("enum: fmt.test.enum.Enum.Two\n", "enum: {}\n", .{value});
|
||
try expectFmt("enum: fmt.test.enum.Enum.Two\n", "enum: {}\n", .{&value});
|
||
try expectFmt("enum: fmt.test.enum.Enum.One\n", "enum: {}\n", .{Enum.One});
|
||
try expectFmt("enum: fmt.test.enum.Enum.Two\n", "enum: {}\n", .{Enum.Two});
|
||
|
||
// test very large enum to verify ct branch quota is large enough
|
||
// TODO: https://github.com/ziglang/zig/issues/15609
|
||
if (!((builtin.cpu.arch == .wasm32) and builtin.mode == .Debug)) {
|
||
try expectFmt("enum: os.windows.win32error.Win32Error.INVALID_FUNCTION\n", "enum: {}\n", .{std.os.windows.Win32Error.INVALID_FUNCTION});
|
||
}
|
||
|
||
const E = enum {
|
||
One,
|
||
Two,
|
||
Three,
|
||
};
|
||
|
||
const inst = E.Two;
|
||
|
||
try expectFmt("fmt.test.enum.E.Two", "{}", .{inst});
|
||
}
|
||
|
||
test "non-exhaustive enum" {
|
||
const Enum = enum(u16) {
|
||
One = 0x000f,
|
||
Two = 0xbeef,
|
||
_,
|
||
};
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum.One\n", "enum: {}\n", .{Enum.One});
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum.Two\n", "enum: {}\n", .{Enum.Two});
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum(4660)\n", "enum: {}\n", .{@as(Enum, @enumFromInt(0x1234))});
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum.One\n", "enum: {x}\n", .{Enum.One});
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum.Two\n", "enum: {x}\n", .{Enum.Two});
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum.Two\n", "enum: {X}\n", .{Enum.Two});
|
||
try expectFmt("enum: fmt.test.non-exhaustive enum.Enum(1234)\n", "enum: {x}\n", .{@as(Enum, @enumFromInt(0x1234))});
|
||
}
|
||
|
||
test "float.scientific" {
|
||
try expectFmt("f32: 1.34000003e+00", "f32: {e}", .{@as(f32, 1.34)});
|
||
try expectFmt("f32: 1.23400001e+01", "f32: {e}", .{@as(f32, 12.34)});
|
||
try expectFmt("f64: -1.234e+11", "f64: {e}", .{@as(f64, -12.34e10)});
|
||
try expectFmt("f64: 9.99996e-40", "f64: {e}", .{@as(f64, 9.999960e-40)});
|
||
}
|
||
|
||
test "float.scientific.precision" {
|
||
try expectFmt("f64: 1.40971e-42", "f64: {e:.5}", .{@as(f64, 1.409706e-42)});
|
||
try expectFmt("f64: 1.00000e-09", "f64: {e:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 814313563))))});
|
||
try expectFmt("f64: 7.81250e-03", "f64: {e:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1006632960))))});
|
||
// libc rounds 1.000005e+05 to 1.00000e+05 but zig does 1.00001e+05.
|
||
// In fact, libc doesn't round a lot of 5 cases up when one past the precision point.
|
||
try expectFmt("f64: 1.00001e+05", "f64: {e:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1203982400))))});
|
||
}
|
||
|
||
test "float.special" {
|
||
try expectFmt("f64: nan", "f64: {}", .{math.nan_f64});
|
||
// negative nan is not defined by IEE 754,
|
||
// and ARM thus normalizes it to positive nan
|
||
if (builtin.target.cpu.arch != .arm) {
|
||
try expectFmt("f64: -nan", "f64: {}", .{-math.nan_f64});
|
||
}
|
||
try expectFmt("f64: inf", "f64: {}", .{math.inf(f64)});
|
||
try expectFmt("f64: -inf", "f64: {}", .{-math.inf(f64)});
|
||
}
|
||
|
||
test "float.hexadecimal.special" {
|
||
try expectFmt("f64: nan", "f64: {x}", .{math.nan_f64});
|
||
// negative nan is not defined by IEE 754,
|
||
// and ARM thus normalizes it to positive nan
|
||
if (builtin.target.cpu.arch != .arm) {
|
||
try expectFmt("f64: -nan", "f64: {x}", .{-math.nan_f64});
|
||
}
|
||
try expectFmt("f64: inf", "f64: {x}", .{math.inf(f64)});
|
||
try expectFmt("f64: -inf", "f64: {x}", .{-math.inf(f64)});
|
||
|
||
try expectFmt("f64: 0x0.0p0", "f64: {x}", .{@as(f64, 0)});
|
||
try expectFmt("f64: -0x0.0p0", "f64: {x}", .{-@as(f64, 0)});
|
||
}
|
||
|
||
test "float.hexadecimal" {
|
||
try expectFmt("f16: 0x1.554p-2", "f16: {x}", .{@as(f16, 1.0 / 3.0)});
|
||
try expectFmt("f32: 0x1.555556p-2", "f32: {x}", .{@as(f32, 1.0 / 3.0)});
|
||
try expectFmt("f64: 0x1.5555555555555p-2", "f64: {x}", .{@as(f64, 1.0 / 3.0)});
|
||
try expectFmt("f80: 0x1.5555555555555556p-2", "f80: {x}", .{@as(f80, 1.0 / 3.0)});
|
||
try expectFmt("f128: 0x1.5555555555555555555555555555p-2", "f128: {x}", .{@as(f128, 1.0 / 3.0)});
|
||
|
||
try expectFmt("f16: 0x1p-14", "f16: {x}", .{math.floatMin(f16)});
|
||
try expectFmt("f32: 0x1p-126", "f32: {x}", .{math.floatMin(f32)});
|
||
try expectFmt("f64: 0x1p-1022", "f64: {x}", .{math.floatMin(f64)});
|
||
try expectFmt("f80: 0x1p-16382", "f80: {x}", .{math.floatMin(f80)});
|
||
try expectFmt("f128: 0x1p-16382", "f128: {x}", .{math.floatMin(f128)});
|
||
|
||
try expectFmt("f16: 0x0.004p-14", "f16: {x}", .{math.floatTrueMin(f16)});
|
||
try expectFmt("f32: 0x0.000002p-126", "f32: {x}", .{math.floatTrueMin(f32)});
|
||
try expectFmt("f64: 0x0.0000000000001p-1022", "f64: {x}", .{math.floatTrueMin(f64)});
|
||
try expectFmt("f80: 0x0.0000000000000002p-16382", "f80: {x}", .{math.floatTrueMin(f80)});
|
||
try expectFmt("f128: 0x0.0000000000000000000000000001p-16382", "f128: {x}", .{math.floatTrueMin(f128)});
|
||
|
||
try expectFmt("f16: 0x1.ffcp15", "f16: {x}", .{math.floatMax(f16)});
|
||
try expectFmt("f32: 0x1.fffffep127", "f32: {x}", .{math.floatMax(f32)});
|
||
try expectFmt("f64: 0x1.fffffffffffffp1023", "f64: {x}", .{math.floatMax(f64)});
|
||
try expectFmt("f80: 0x1.fffffffffffffffep16383", "f80: {x}", .{math.floatMax(f80)});
|
||
try expectFmt("f128: 0x1.ffffffffffffffffffffffffffffp16383", "f128: {x}", .{math.floatMax(f128)});
|
||
}
|
||
|
||
test "float.hexadecimal.precision" {
|
||
try expectFmt("f16: 0x1.5p-2", "f16: {x:.1}", .{@as(f16, 1.0 / 3.0)});
|
||
try expectFmt("f32: 0x1.555p-2", "f32: {x:.3}", .{@as(f32, 1.0 / 3.0)});
|
||
try expectFmt("f64: 0x1.55555p-2", "f64: {x:.5}", .{@as(f64, 1.0 / 3.0)});
|
||
try expectFmt("f80: 0x1.5555555p-2", "f80: {x:.7}", .{@as(f80, 1.0 / 3.0)});
|
||
try expectFmt("f128: 0x1.555555555p-2", "f128: {x:.9}", .{@as(f128, 1.0 / 3.0)});
|
||
|
||
try expectFmt("f16: 0x1.00000p0", "f16: {x:.5}", .{@as(f16, 1.0)});
|
||
try expectFmt("f32: 0x1.00000p0", "f32: {x:.5}", .{@as(f32, 1.0)});
|
||
try expectFmt("f64: 0x1.00000p0", "f64: {x:.5}", .{@as(f64, 1.0)});
|
||
try expectFmt("f80: 0x1.00000p0", "f80: {x:.5}", .{@as(f80, 1.0)});
|
||
try expectFmt("f128: 0x1.00000p0", "f128: {x:.5}", .{@as(f128, 1.0)});
|
||
}
|
||
|
||
test "float.decimal" {
|
||
try expectFmt("f64: 152314000000000000000000000000", "f64: {d}", .{@as(f64, 1.52314e+29)});
|
||
try expectFmt("f32: 0", "f32: {d}", .{@as(f32, 0.0)});
|
||
try expectFmt("f32: 0", "f32: {d:.0}", .{@as(f32, 0.0)});
|
||
try expectFmt("f32: 1.1", "f32: {d:.1}", .{@as(f32, 1.1234)});
|
||
try expectFmt("f32: 1234.57", "f32: {d:.2}", .{@as(f32, 1234.567)});
|
||
// -11.1234 is converted to f64 -11.12339... internally (errol3() function takes f64).
|
||
// -11.12339... is rounded back up to -11.1234
|
||
try expectFmt("f32: -11.1234", "f32: {d:.4}", .{@as(f32, -11.1234)});
|
||
try expectFmt("f32: 91.12345", "f32: {d:.5}", .{@as(f32, 91.12345)});
|
||
try expectFmt("f64: 91.1234567890", "f64: {d:.10}", .{@as(f64, 91.12345678901235)});
|
||
try expectFmt("f64: 0.00000", "f64: {d:.5}", .{@as(f64, 0.0)});
|
||
try expectFmt("f64: 6", "f64: {d:.0}", .{@as(f64, 5.700)});
|
||
try expectFmt("f64: 10.0", "f64: {d:.1}", .{@as(f64, 9.999)});
|
||
try expectFmt("f64: 1.000", "f64: {d:.3}", .{@as(f64, 1.0)});
|
||
try expectFmt("f64: 0.00030000", "f64: {d:.8}", .{@as(f64, 0.0003)});
|
||
try expectFmt("f64: 0.00000", "f64: {d:.5}", .{@as(f64, 1.40130e-45)});
|
||
try expectFmt("f64: 0.00000", "f64: {d:.5}", .{@as(f64, 9.999960e-40)});
|
||
try expectFmt("f64: 10000000000000.00", "f64: {d:.2}", .{@as(f64, 9999999999999.999)});
|
||
try expectFmt("f64: 10000000000000000000000000000000000000", "f64: {d}", .{@as(f64, 1e37)});
|
||
try expectFmt("f64: 100000000000000000000000000000000000000", "f64: {d}", .{@as(f64, 1e38)});
|
||
}
|
||
|
||
test "float.libc.sanity" {
|
||
try expectFmt("f64: 0.00001", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 916964781))))});
|
||
try expectFmt("f64: 0.00001", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 925353389))))});
|
||
try expectFmt("f64: 0.10000", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1036831278))))});
|
||
try expectFmt("f64: 1.00000", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1065353133))))});
|
||
try expectFmt("f64: 10.00000", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1092616192))))});
|
||
|
||
// libc differences
|
||
//
|
||
// This is 0.015625 exactly according to gdb. We thus round down,
|
||
// however glibc rounds up for some reason. This occurs for all
|
||
// floats of the form x.yyyy25 on a precision point.
|
||
try expectFmt("f64: 0.01563", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1015021568))))});
|
||
// errol3 rounds to ... 630 but libc rounds to ...632. Grisu3
|
||
// also rounds to 630 so I'm inclined to believe libc is not
|
||
// optimal here.
|
||
try expectFmt("f64: 18014400656965630.00000", "f64: {d:.5}", .{@as(f64, @as(f32, @bitCast(@as(u32, 1518338049))))});
|
||
}
|
||
|
||
test "custom" {
|
||
const Vec2 = struct {
|
||
const SelfType = @This();
|
||
x: f32,
|
||
y: f32,
|
||
|
||
pub fn format(
|
||
self: SelfType,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
_ = options;
|
||
if (fmt.len == 0 or comptime std.mem.eql(u8, fmt, "p")) {
|
||
return std.fmt.format(writer, "({d:.3},{d:.3})", .{ self.x, self.y });
|
||
} else if (comptime std.mem.eql(u8, fmt, "d")) {
|
||
return std.fmt.format(writer, "{d:.3}x{d:.3}", .{ self.x, self.y });
|
||
} else {
|
||
@compileError("unknown format character: '" ++ fmt ++ "'");
|
||
}
|
||
}
|
||
};
|
||
|
||
var value = Vec2{
|
||
.x = 10.2,
|
||
.y = 2.22,
|
||
};
|
||
try expectFmt("point: (10.200,2.220)\n", "point: {}\n", .{&value});
|
||
try expectFmt("dim: 10.200x2.220\n", "dim: {d}\n", .{&value});
|
||
|
||
// same thing but not passing a pointer
|
||
try expectFmt("point: (10.200,2.220)\n", "point: {}\n", .{value});
|
||
try expectFmt("dim: 10.200x2.220\n", "dim: {d}\n", .{value});
|
||
}
|
||
|
||
test "union" {
|
||
const TU = union(enum) {
|
||
float: f32,
|
||
int: u32,
|
||
};
|
||
|
||
const UU = union {
|
||
float: f32,
|
||
int: u32,
|
||
};
|
||
|
||
const EU = extern union {
|
||
float: f32,
|
||
int: u32,
|
||
};
|
||
|
||
const tu_inst = TU{ .int = 123 };
|
||
const uu_inst = UU{ .int = 456 };
|
||
const eu_inst = EU{ .float = 321.123 };
|
||
|
||
try expectFmt("fmt.test.union.TU{ .int = 123 }", "{}", .{tu_inst});
|
||
|
||
var buf: [100]u8 = undefined;
|
||
const uu_result = try bufPrint(buf[0..], "{}", .{uu_inst});
|
||
try std.testing.expect(mem.eql(u8, uu_result[0..18], "fmt.test.union.UU@"));
|
||
|
||
const eu_result = try bufPrint(buf[0..], "{}", .{eu_inst});
|
||
try std.testing.expect(mem.eql(u8, eu_result[0..18], "fmt.test.union.EU@"));
|
||
}
|
||
|
||
test "struct.self-referential" {
|
||
const S = struct {
|
||
const SelfType = @This();
|
||
a: ?*SelfType,
|
||
};
|
||
|
||
var inst = S{
|
||
.a = null,
|
||
};
|
||
inst.a = &inst;
|
||
|
||
try expectFmt("fmt.test.struct.self-referential.S{ .a = fmt.test.struct.self-referential.S{ .a = fmt.test.struct.self-referential.S{ .a = fmt.test.struct.self-referential.S{ ... } } } }", "{}", .{inst});
|
||
}
|
||
|
||
test "struct.zero-size" {
|
||
const A = struct {
|
||
fn foo() void {}
|
||
};
|
||
const B = struct {
|
||
a: A,
|
||
c: i32,
|
||
};
|
||
|
||
const a = A{};
|
||
const b = B{ .a = a, .c = 0 };
|
||
|
||
try expectFmt("fmt.test.struct.zero-size.B{ .a = fmt.test.struct.zero-size.A{ }, .c = 0 }", "{}", .{b});
|
||
}
|
||
|
||
test "bytes.hex" {
|
||
const some_bytes = "\xCA\xFE\xBA\xBE";
|
||
try expectFmt("lowercase: cafebabe\n", "lowercase: {x}\n", .{fmtSliceHexLower(some_bytes)});
|
||
try expectFmt("uppercase: CAFEBABE\n", "uppercase: {X}\n", .{fmtSliceHexUpper(some_bytes)});
|
||
//Test Slices
|
||
try expectFmt("uppercase: CAFE\n", "uppercase: {X}\n", .{fmtSliceHexUpper(some_bytes[0..2])});
|
||
try expectFmt("lowercase: babe\n", "lowercase: {x}\n", .{fmtSliceHexLower(some_bytes[2..])});
|
||
const bytes_with_zeros = "\x00\x0E\xBA\xBE";
|
||
try expectFmt("lowercase: 000ebabe\n", "lowercase: {x}\n", .{fmtSliceHexLower(bytes_with_zeros)});
|
||
}
|
||
|
||
/// Encodes a sequence of bytes as hexadecimal digits.
|
||
/// Returns an array containing the encoded bytes.
|
||
pub fn bytesToHex(input: anytype, case: Case) [input.len * 2]u8 {
|
||
if (input.len == 0) return [_]u8{};
|
||
comptime assert(@TypeOf(input[0]) == u8); // elements to encode must be unsigned bytes
|
||
|
||
const charset = "0123456789" ++ if (case == .upper) "ABCDEF" else "abcdef";
|
||
var result: [input.len * 2]u8 = undefined;
|
||
for (input, 0..) |b, i| {
|
||
result[i * 2 + 0] = charset[b >> 4];
|
||
result[i * 2 + 1] = charset[b & 15];
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/// Decodes the sequence of bytes represented by the specified string of
|
||
/// hexadecimal characters.
|
||
/// Returns a slice of the output buffer containing the decoded bytes.
|
||
pub fn hexToBytes(out: []u8, input: []const u8) ![]u8 {
|
||
// Expect 0 or n pairs of hexadecimal digits.
|
||
if (input.len & 1 != 0)
|
||
return error.InvalidLength;
|
||
if (out.len * 2 < input.len)
|
||
return error.NoSpaceLeft;
|
||
|
||
var in_i: usize = 0;
|
||
while (in_i < input.len) : (in_i += 2) {
|
||
const hi = try charToDigit(input[in_i], 16);
|
||
const lo = try charToDigit(input[in_i + 1], 16);
|
||
out[in_i / 2] = (hi << 4) | lo;
|
||
}
|
||
|
||
return out[0 .. in_i / 2];
|
||
}
|
||
|
||
test "bytesToHex" {
|
||
const input = "input slice";
|
||
const encoded = bytesToHex(input, .lower);
|
||
var decoded: [input.len]u8 = undefined;
|
||
try std.testing.expectEqualSlices(u8, input, try hexToBytes(&decoded, &encoded));
|
||
}
|
||
|
||
test "hexToBytes" {
|
||
var buf: [32]u8 = undefined;
|
||
try expectFmt("90" ** 32, "{s}", .{fmtSliceHexUpper(try hexToBytes(&buf, "90" ** 32))});
|
||
try expectFmt("ABCD", "{s}", .{fmtSliceHexUpper(try hexToBytes(&buf, "ABCD"))});
|
||
try expectFmt("", "{s}", .{fmtSliceHexUpper(try hexToBytes(&buf, ""))});
|
||
try std.testing.expectError(error.InvalidCharacter, hexToBytes(&buf, "012Z"));
|
||
try std.testing.expectError(error.InvalidLength, hexToBytes(&buf, "AAA"));
|
||
try std.testing.expectError(error.NoSpaceLeft, hexToBytes(buf[0..1], "ABAB"));
|
||
}
|
||
|
||
test "formatIntValue with comptime_int" {
|
||
const value: comptime_int = 123456789123456789;
|
||
|
||
var buf: [20]u8 = undefined;
|
||
var fbs = std.io.fixedBufferStream(&buf);
|
||
try formatIntValue(value, "", FormatOptions{}, fbs.writer());
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "123456789123456789"));
|
||
}
|
||
|
||
test "formatFloatValue with comptime_float" {
|
||
const value: comptime_float = 1.0;
|
||
|
||
var buf: [20]u8 = undefined;
|
||
var fbs = std.io.fixedBufferStream(&buf);
|
||
try formatFloatValue(value, "", FormatOptions{}, fbs.writer());
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "1.0e+00"));
|
||
|
||
try expectFmt("1.0e+00", "{}", .{value});
|
||
try expectFmt("1.0e+00", "{}", .{1.0});
|
||
}
|
||
|
||
test "formatType max_depth" {
|
||
const Vec2 = struct {
|
||
const SelfType = @This();
|
||
x: f32,
|
||
y: f32,
|
||
|
||
pub fn format(
|
||
self: SelfType,
|
||
comptime fmt: []const u8,
|
||
options: FormatOptions,
|
||
writer: anytype,
|
||
) !void {
|
||
_ = options;
|
||
if (fmt.len == 0) {
|
||
return std.fmt.format(writer, "({d:.3},{d:.3})", .{ self.x, self.y });
|
||
} else {
|
||
@compileError("unknown format string: '" ++ fmt ++ "'");
|
||
}
|
||
}
|
||
};
|
||
const E = enum {
|
||
One,
|
||
Two,
|
||
Three,
|
||
};
|
||
const TU = union(enum) {
|
||
const SelfType = @This();
|
||
float: f32,
|
||
int: u32,
|
||
ptr: ?*SelfType,
|
||
};
|
||
const S = struct {
|
||
const SelfType = @This();
|
||
a: ?*SelfType,
|
||
tu: TU,
|
||
e: E,
|
||
vec: Vec2,
|
||
};
|
||
|
||
var inst = S{
|
||
.a = null,
|
||
.tu = TU{ .ptr = null },
|
||
.e = E.Two,
|
||
.vec = Vec2{ .x = 10.2, .y = 2.22 },
|
||
};
|
||
inst.a = &inst;
|
||
inst.tu.ptr = &inst.tu;
|
||
|
||
var buf: [1000]u8 = undefined;
|
||
var fbs = std.io.fixedBufferStream(&buf);
|
||
try formatType(inst, "", FormatOptions{}, fbs.writer(), 0);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "fmt.test.formatType max_depth.S{ ... }"));
|
||
|
||
fbs.reset();
|
||
try formatType(inst, "", FormatOptions{}, fbs.writer(), 1);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "fmt.test.formatType max_depth.S{ .a = fmt.test.formatType max_depth.S{ ... }, .tu = fmt.test.formatType max_depth.TU{ ... }, .e = fmt.test.formatType max_depth.E.Two, .vec = (10.200,2.220) }"));
|
||
|
||
fbs.reset();
|
||
try formatType(inst, "", FormatOptions{}, fbs.writer(), 2);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "fmt.test.formatType max_depth.S{ .a = fmt.test.formatType max_depth.S{ .a = fmt.test.formatType max_depth.S{ ... }, .tu = fmt.test.formatType max_depth.TU{ ... }, .e = fmt.test.formatType max_depth.E.Two, .vec = (10.200,2.220) }, .tu = fmt.test.formatType max_depth.TU{ .ptr = fmt.test.formatType max_depth.TU{ ... } }, .e = fmt.test.formatType max_depth.E.Two, .vec = (10.200,2.220) }"));
|
||
|
||
fbs.reset();
|
||
try formatType(inst, "", FormatOptions{}, fbs.writer(), 3);
|
||
try std.testing.expect(mem.eql(u8, fbs.getWritten(), "fmt.test.formatType max_depth.S{ .a = fmt.test.formatType max_depth.S{ .a = fmt.test.formatType max_depth.S{ .a = fmt.test.formatType max_depth.S{ ... }, .tu = fmt.test.formatType max_depth.TU{ ... }, .e = fmt.test.formatType max_depth.E.Two, .vec = (10.200,2.220) }, .tu = fmt.test.formatType max_depth.TU{ .ptr = fmt.test.formatType max_depth.TU{ ... } }, .e = fmt.test.formatType max_depth.E.Two, .vec = (10.200,2.220) }, .tu = fmt.test.formatType max_depth.TU{ .ptr = fmt.test.formatType max_depth.TU{ .ptr = fmt.test.formatType max_depth.TU{ ... } } }, .e = fmt.test.formatType max_depth.E.Two, .vec = (10.200,2.220) }"));
|
||
}
|
||
|
||
test "positional" {
|
||
try expectFmt("2 1 0", "{2} {1} {0}", .{ @as(usize, 0), @as(usize, 1), @as(usize, 2) });
|
||
try expectFmt("2 1 0", "{2} {1} {}", .{ @as(usize, 0), @as(usize, 1), @as(usize, 2) });
|
||
try expectFmt("0 0", "{0} {0}", .{@as(usize, 0)});
|
||
try expectFmt("0 1", "{} {1}", .{ @as(usize, 0), @as(usize, 1) });
|
||
try expectFmt("1 0 0 1", "{1} {} {0} {}", .{ @as(usize, 0), @as(usize, 1) });
|
||
}
|
||
|
||
test "positional with specifier" {
|
||
try expectFmt("10.0", "{0d:.1}", .{@as(f64, 9.999)});
|
||
}
|
||
|
||
test "positional/alignment/width/precision" {
|
||
try expectFmt("10.0", "{0d: >3.1}", .{@as(f64, 9.999)});
|
||
}
|
||
|
||
test "vector" {
|
||
if (builtin.target.cpu.arch == .riscv64) {
|
||
// https://github.com/ziglang/zig/issues/4486
|
||
return error.SkipZigTest;
|
||
}
|
||
|
||
const vbool: @Vector(4, bool) = [_]bool{ true, false, true, false };
|
||
const vi64: @Vector(4, i64) = [_]i64{ -2, -1, 0, 1 };
|
||
const vu64: @Vector(4, u64) = [_]u64{ 1000, 2000, 3000, 4000 };
|
||
|
||
try expectFmt("{ true, false, true, false }", "{}", .{vbool});
|
||
try expectFmt("{ -2, -1, 0, 1 }", "{}", .{vi64});
|
||
try expectFmt("{ -2, -1, +0, +1 }", "{d:5}", .{vi64});
|
||
try expectFmt("{ 1000, 2000, 3000, 4000 }", "{}", .{vu64});
|
||
try expectFmt("{ 3e8, 7d0, bb8, fa0 }", "{x}", .{vu64});
|
||
}
|
||
|
||
test "enum-literal" {
|
||
try expectFmt(".hello_world", "{}", .{.hello_world});
|
||
}
|
||
|
||
test "padding" {
|
||
try expectFmt("Simple", "{s}", .{"Simple"});
|
||
try expectFmt(" true", "{:10}", .{true});
|
||
try expectFmt(" true", "{:>10}", .{true});
|
||
try expectFmt("======true", "{:=>10}", .{true});
|
||
try expectFmt("true======", "{:=<10}", .{true});
|
||
try expectFmt(" true ", "{:^10}", .{true});
|
||
try expectFmt("===true===", "{:=^10}", .{true});
|
||
try expectFmt(" Minimum width", "{s:18} width", .{"Minimum"});
|
||
try expectFmt("==================Filled", "{s:=>24}", .{"Filled"});
|
||
try expectFmt(" Centered ", "{s:^24}", .{"Centered"});
|
||
try expectFmt("-", "{s:-^1}", .{""});
|
||
try expectFmt("==crêpe===", "{s:=^10}", .{"crêpe"});
|
||
try expectFmt("=====crêpe", "{s:=>10}", .{"crêpe"});
|
||
try expectFmt("crêpe=====", "{s:=<10}", .{"crêpe"});
|
||
try expectFmt("====a", "{c:=>5}", .{'a'});
|
||
try expectFmt("==a==", "{c:=^5}", .{'a'});
|
||
try expectFmt("a====", "{c:=<5}", .{'a'});
|
||
}
|
||
|
||
test "decimal float padding" {
|
||
var number: f32 = 3.1415;
|
||
try expectFmt("left-pad: **3.141\n", "left-pad: {d:*>7.3}\n", .{number});
|
||
try expectFmt("center-pad: *3.141*\n", "center-pad: {d:*^7.3}\n", .{number});
|
||
try expectFmt("right-pad: 3.141**\n", "right-pad: {d:*<7.3}\n", .{number});
|
||
}
|
||
|
||
test "sci float padding" {
|
||
var number: f32 = 3.1415;
|
||
try expectFmt("left-pad: **3.141e+00\n", "left-pad: {e:*>11.3}\n", .{number});
|
||
try expectFmt("center-pad: *3.141e+00*\n", "center-pad: {e:*^11.3}\n", .{number});
|
||
try expectFmt("right-pad: 3.141e+00**\n", "right-pad: {e:*<11.3}\n", .{number});
|
||
}
|
||
|
||
test "null" {
|
||
const inst = null;
|
||
try expectFmt("null", "{}", .{inst});
|
||
}
|
||
|
||
test "type" {
|
||
try expectFmt("u8", "{}", .{u8});
|
||
try expectFmt("?f32", "{}", .{?f32});
|
||
try expectFmt("[]const u8", "{}", .{[]const u8});
|
||
}
|
||
|
||
test "named arguments" {
|
||
try expectFmt("hello world!", "{s} world{c}", .{ "hello", '!' });
|
||
try expectFmt("hello world!", "{[greeting]s} world{[punctuation]c}", .{ .punctuation = '!', .greeting = "hello" });
|
||
try expectFmt("hello world!", "{[1]s} world{[0]c}", .{ '!', "hello" });
|
||
}
|
||
|
||
test "runtime width specifier" {
|
||
var width: usize = 9;
|
||
try expectFmt("~~hello~~", "{s:~^[1]}", .{ "hello", width });
|
||
try expectFmt("~~hello~~", "{s:~^[width]}", .{ .string = "hello", .width = width });
|
||
try expectFmt(" hello", "{s:[1]}", .{ "hello", width });
|
||
try expectFmt("42 hello", "{d} {s:[2]}", .{ 42, "hello", width });
|
||
}
|
||
|
||
test "runtime precision specifier" {
|
||
var number: f32 = 3.1415;
|
||
var precision: usize = 2;
|
||
try expectFmt("3.14e+00", "{:1.[1]}", .{ number, precision });
|
||
try expectFmt("3.14e+00", "{:1.[precision]}", .{ .number = number, .precision = precision });
|
||
}
|
||
|
||
test "recursive format function" {
|
||
const R = union(enum) {
|
||
const R = @This();
|
||
Leaf: i32,
|
||
Branch: struct { left: *const R, right: *const R },
|
||
|
||
pub fn format(self: R, comptime _: []const u8, _: std.fmt.FormatOptions, writer: anytype) !void {
|
||
return switch (self) {
|
||
.Leaf => |n| std.fmt.format(writer, "Leaf({})", .{n}),
|
||
.Branch => |b| std.fmt.format(writer, "Branch({}, {})", .{ b.left, b.right }),
|
||
};
|
||
}
|
||
};
|
||
|
||
var r = R{ .Leaf = 1 };
|
||
try expectFmt("Leaf(1)\n", "{}\n", .{&r});
|
||
}
|