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const std = @import("std");
const Allocator = std.mem.Allocator;
const ArrayList = std.ArrayList;
const syntax = @import("../syntax.zig");
const FileSpec = syntax.FileSpec;
const types = @import("./lib/types.zig");
const CommandStatus = types.CommandStatus;
const CommandContext = types.CommandContext;
pub const Type = struct {
file: FileSpec,
pub fn eval(type_cmd: Type, ctx: CommandContext) !CommandStatus {
const file_path = switch (type_cmd.file) {
.Con => {
const error_msg = "Cannot TYPE from CON\n";
var writer = ctx.output_writer;
try writer.write(error_msg);
return CommandStatus{ .Code = 1 };
},
.Lpt1, .Lpt2, .Lpt3, .Prn => {
const error_msg = "Cannot TYPE from device\n";
var writer = ctx.output_writer;
try writer.write(error_msg);
return CommandStatus{ .Code = 1 };
},
.Path => |path| path,
};
const file = std.fs.cwd().openFile(file_path, .{}) catch |err| {
const error_msg = switch (err) {
error.FileNotFound => "The system cannot find the file specified.\n",
error.IsDir => "Access is denied.\n",
error.AccessDenied => "Access is denied.\n",
else => "Cannot access file.\n",
};
var writer = ctx.output_writer;
try writer.write(error_msg);
return CommandStatus{ .Code = 1 };
};
defer file.close();
// Read and display file contents
var buffer: [4096]u8 = undefined;
while (true) {
const bytes_read = file.readAll(&buffer) catch |err| {
const error_msg = switch (err) {
error.AccessDenied => "Access is denied.\n",
else => "Error reading file.\n",
};
var writer = ctx.output_writer;
try writer.write(error_msg);
return CommandStatus{ .Code = 1 };
};
if (bytes_read == 0) break;
// Process buffer contents for output
var processed_output = ArrayList(u8){};
defer processed_output.deinit(ctx.allocator);
for (buffer[0..bytes_read]) |byte| {
// Convert to printable characters, similar to DOS TYPE behavior
if (byte >= 32 and byte <= 126) {
try processed_output.append(ctx.allocator, byte);
} else if (byte == '\n') {
try processed_output.append(ctx.allocator, '\n');
} else if (byte == '\r') {
// Skip carriage return in DOS-style line endings
continue;
} else if (byte == '\t') {
try processed_output.append(ctx.allocator, '\t');
} else {
// Replace non-printable characters with '?'
try processed_output.append(ctx.allocator, '?');
}
}
var writer = ctx.output_writer;
try writer.write(processed_output.items);
// If we read less than the buffer size, we're done
if (bytes_read < buffer.len) break;
}
return CommandStatus{ .Code = 0 };
}
};
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