86 行
2.2 KiB
Zig
86 行
2.2 KiB
Zig
const std = @import("std");
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const io = std.io;
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const os = std.os;
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const version = @import("version.zig").version;
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fn help() !void {
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const stdof = io.getStdOut().writer();
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var bw = io.bufferedWriter(stdof);
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const stdout = bw.writer();
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try stdout.print("076 coreutils\n", .{});
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try stdout.print("使用法: echo\n", .{});
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try stdout.print("文章を表示\n\n", .{});
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try stdout.print("-h ヘルプを表示\n", .{});
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try stdout.print("-v バージョンを表示\n", .{});
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try stdout.print("-n ニューラインを見逃す\n", .{});
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try bw.flush();
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}
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fn ver() !void {
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const stdof = io.getStdOut().writer();
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var bw = io.bufferedWriter(stdof);
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const stdout = bw.writer();
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try stdout.print("echo (076 coreutils) {s}\n", .{version});
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try bw.flush();
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}
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pub fn main() !void {
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const alloc = gpa.allocator();
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var option = std.ArrayList(u8).init(alloc);
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defer option.deinit();
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const args = try std.process.argsAlloc(alloc);
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defer std.process.argsFree(alloc, args);
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var text: [1024]u8 = undefined;
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var text_len: usize = 0;
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for (args, 0..) |arg, i| {
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if (i == 0) continue;
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var m: [1]u8 = [_]u8{'-'};
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if (std.mem.eql(u8, arg[0..1], m[0..])) {
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for (arg, 0..) |a, j| {
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if (j == 0) continue;
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try option.append(a);
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}
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} else {
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const length = std.math.min(arg.len, text.len - 1);
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std.mem.copy(u8, text[0..length], arg[0..length]);
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text_len = length;
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}
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}
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var isnonl = false;
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for (option.items) |i| {
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if (i == 'h') {
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try help();
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return;
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}
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if (i == 'v') {
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try ver();
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return;
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}
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if (i == 'n') {
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isnonl = true;
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}
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}
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const stdof = io.getStdOut().writer();
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var bw = io.bufferedWriter(stdof);
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const stdout = bw.writer();
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if (isnonl) {
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try stdout.print("{s}", .{text[0..text_len]});
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} else {
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try stdout.print("{s}\n", .{text[0..text_len]});
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}
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try bw.flush();
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}
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