const std = @import("std"); const fs = std.fs; const io = std.io; const version = @import("version.zig").version; fn help() !void { const stdof = io.getStdOut().writer(); var bw = io.bufferedWriter(stdof); const stdout = bw.writer(); try stdout.print("076 coreutils\n", .{}); try stdout.print("使用法: cat [オプション]... [ファイル]...\n", .{}); try stdout.print("ファイル (複数可) の内容を結合して標準出力に出力します。\n\n", .{}); try stdout.print("ファイルの指定がない場合や FILE が - の場合, 標準入力から読み込みを行います。\n\n", .{}); try stdout.print("-b カッコの行列以外、全ての行に行番号を付ける\n", .{}); //try stdout.print("-c 色\n", .{}); try stdout.print("-d 全部は1行列に表示する\n", .{}); try stdout.print("-n 全ての行に行番号を付ける\n", .{}); try stdout.print("-s カッコの行列を見逃す\n", .{}); try stdout.print("-u 不使用\n", .{}); try stdout.print("-h ヘルプを表示\n", .{}); try stdout.print("-v バージョンを表示\n", .{}); try bw.flush(); } fn ver() !void { const stdof = io.getStdOut().writer(); var bw = io.bufferedWriter(stdof); const stdout = bw.writer(); try stdout.print("cat (076 coreutils) {s}\n", .{version}); try bw.flush(); } pub fn main() !void { var gpa = std.heap.GeneralPurposeAllocator(.{}){}; defer _ = gpa.deinit(); const alloc = gpa.allocator(); var option = std.ArrayList(u8).init(alloc); defer option.deinit(); var fname = std.ArrayList([]const u8).init(alloc); defer fname.deinit(); const args = try std.process.argsAlloc(alloc); defer std.process.argsFree(alloc, args); for (args, 0..) |arg, i| { if (i == 0) continue; var m: [1]u8 = [_]u8{'-'}; if (std.mem.eql(u8, arg[0..1], m[0..])) { for (arg, 0..) |a, j| { if (j == 0) continue; try option.append(a); } } else { try fname.append(arg); } } var isnun: bool = false; var iscol: bool = false; var isone: bool = false; var isnum: bool = false; var issqz: bool = false; var line_number: usize = 0; for (option.items) |i| { if (i == 'h') { try help(); return; } if (i == 'v') { try ver(); return; } if (i == 'b') isnun = true; if (i == 'c') iscol = true; if (i == 'd') isone = true; if (i == 'n') isnum = true; if (i == 's') issqz = true; } if (fname.items.len == 0) { try help(); return; } for (fname.items) |item| { const file = try fs.cwd().openFile(item, .{}); defer file.close(); var buf: [1024]u8 = undefined; while (true) { const result = try file.reader().readUntilDelimiterOrEof(buf[0..], '\n') orelse break; if (issqz and std.mem.trimRight(u8, result, "\n\r").len == 0) continue; const stripped = std.mem.trim(u8, result, " \n\t\r"); if (isone) { try io.getStdOut().writer().writeAll(stripped); } else { if (isnum or (isnun and stripped.len != 0)) { line_number += 1; try io.getStdOut().writer().print(" {:3} | ", .{line_number}); } else if (isnum) { line_number += 1; try io.getStdOut().writer().print(" {:3} | ", .{line_number}); } try io.getStdOut().writer().writeAll(result); try io.getStdOut().writer().print("\n", .{}); } } } }