88 lines
2.2 KiB
Zig
88 lines
2.2 KiB
Zig
const std = @import("std");
|
|
|
|
const runners = @import("runner.zig");
|
|
|
|
const Allocator = std.mem.Allocator;
|
|
|
|
pub const Result = error{
|
|
Ok,
|
|
ScannerError,
|
|
CompileError,
|
|
};
|
|
|
|
pub const StdOut = *std.io.OutStream(std.fs.File.WriteError);
|
|
|
|
fn run(allocator: *Allocator, data: []u8) !void {
|
|
var stdout_file = std.io.getStdOut();
|
|
const stdout = &stdout_file.outStream().stream;
|
|
|
|
var runner = runners.Runner.init(allocator, stdout);
|
|
return runner.execute(data);
|
|
}
|
|
|
|
fn runFile(allocator: *Allocator, path: []const u8) !void {
|
|
var file = try std.fs.File.openRead(path);
|
|
defer file.close();
|
|
|
|
const total_bytes = try file.getEndPos();
|
|
|
|
var slice = try allocator.alloc(u8, total_bytes);
|
|
_ = try file.read(slice);
|
|
|
|
run(allocator, slice) catch |err| {
|
|
switch (err) {
|
|
Result.Ok => {},
|
|
Result.CompileError => std.os.exit(65),
|
|
else => return err,
|
|
}
|
|
};
|
|
}
|
|
|
|
fn runPrompt(allocator: *Allocator) !void {
|
|
var stdout_file = std.io.getStdOut();
|
|
const stdout = &stdout_file.outStream().stream;
|
|
|
|
while (true) {
|
|
try stdout.print("> ");
|
|
var buffer = try std.Buffer.init(allocator, ""[0..]);
|
|
|
|
var line = std.io.readLine(&buffer) catch |err| {
|
|
if (err == error.EndOfStream) return;
|
|
return err;
|
|
};
|
|
|
|
run(allocator, line) catch |err| {
|
|
switch (err) {
|
|
Result.Ok => {},
|
|
Result.ScannerError => blk: {
|
|
try stdout.print("scanner error.\n");
|
|
},
|
|
Result.CompileError => blk: {
|
|
try stdout.print("compile error.\n");
|
|
},
|
|
else => return err,
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
pub fn main() anyerror!void {
|
|
var arena = std.heap.ArenaAllocator.init(std.heap.direct_allocator);
|
|
defer arena.deinit();
|
|
var allocator = &arena.allocator;
|
|
|
|
var stdout_file = std.io.getStdOut();
|
|
var stdout = &stdout_file.outStream().stream;
|
|
|
|
var args_it = std.process.args();
|
|
|
|
_ = args_it.next(allocator);
|
|
|
|
var filePath = try (args_it.next(allocator) orelse {
|
|
try runPrompt(allocator);
|
|
return;
|
|
});
|
|
|
|
try runFile(allocator, filePath);
|
|
}
|