1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
use std::{io::{self, Read, Write}, cell::RefCell, fs::OpenOptions, rc::Rc};
use matrix::{value::Value, self, vm::Vm, Result, unpack_varargs, iter, unpack_args};
use matrix_macros::native_func;
use crate::{error, VmArgs};
#[native_func(0..)]
fn print(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let ([], varags) = unpack_varargs!(args);
for (i, value) in varags.into_iter().enumerate() {
if i != 0 {
print!(" ");
}
print!("{value}");
}
Ok(Value::Nil)
}
#[native_func(0..)]
fn println(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let ([], varags) = unpack_varargs!(args);
for (i, value) in varags.into_iter().enumerate() {
if i != 0 {
print!(" ");
}
print!("{value}");
}
print!("\n");
Ok(Value::Nil)
}
#[native_func(0)]
fn readln(_: VmArgs, _: Vec<Value>) -> Result<Value> {
let mut input = String::new();
match io::stdin().read_line(&mut input) {
Ok(_) => {
match input.pop() {
Some(c) if c == '\n' => {},
Some(c) => input.push(c),
None => {}
};
Ok(Value::String(input.into()))
},
Err(err) => error!("cant read from stdin: {err}")
}
}
#[native_func(1)]
fn input(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let [prompt] = unpack_args!(args);
let mut input = String::new();
print!("{prompt}");
let _ = io::stdout().flush();
match io::stdin().read_line(&mut input) {
Ok(_) => {
match input.pop() {
Some(c) if c == '\n' => {},
Some(c) => input.push(c),
None => {}
};
Ok(Value::String(input.into()))
},
Err(err) => error!("cant read from stdin: {err}")
}
}
#[native_func(0)]
fn readlines(_: VmArgs, _: Vec<Value>) -> Result<Value> {
let lines = RefCell::new(io::stdin().lines());
Ok(iter!(move |_,_| {
match lines.borrow_mut().next() {
Some(Ok(line)) => Ok(Value::String(line.into())),
_ => Ok(Value::Nil)
}
}))
}
#[native_func(2)]
fn file_open(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let [path, mode] = unpack_args!(args);
let Value::String(mode) = mode else {
return error!("open mode must be a string")
};
let Value::String(path) = path else {
return error!("open path must be a string")
};
let file = match mode.as_ref() {
"r" => OpenOptions::new().read(true).open(path.as_ref()),
"w" => OpenOptions::new().write(true).create(true).truncate(true).open(path.as_ref()),
"a" => OpenOptions::new().write(true).create(true).append(true).open(path.as_ref()),
"r+" => OpenOptions::new().read(true).write(true).open(path.as_ref()),
"w+" => OpenOptions::new().read(true).write(true).create(true).truncate(true).open(path.as_ref()),
"a+" => OpenOptions::new().read(true).write(true).create(true).append(true).open(path.as_ref()),
_ => return error!("invalid open mode: {mode}")
};
match file {
Ok(file) => Ok(Value::File(Rc::new(RefCell::new(file)))),
Err(err) => return error!("cannot open '{path}': {err}")
}
}
#[native_func(1)]
fn file_read(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let [file] = unpack_args!(args);
let Value::File(file) = file else {
return error!("file read requires a file")
};
let mut contents = String::new();
if let Err(err) = file.try_borrow_mut().unwrap().read_to_string(&mut contents) {
return error!("cannot read file: '{err}'")
};
Ok(Value::String(contents.into()))
}
#[native_func(1)]
fn file_lines(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let [file] = unpack_args!(args);
let Value::File(file) = file else {
return error!("file read requires a file")
};
let mut contents = String::new();
if let Err(err) = file.try_borrow_mut().unwrap().read_to_string(&mut contents) {
return error!("cannot read file: '{err}'")
};
let lines: Vec<Rc<str>> = contents.split_inclusive("\n").map(|s| Rc::from(s)).collect();
let lines = RefCell::new(lines.into_iter());
Ok(iter!(move |_,_| {
match lines.borrow_mut().next() {
Some(line) => Ok(Value::String(line)),
None => Ok(Value::Nil)
}
}))
}
#[native_func(2)]
fn file_write(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let [file, content] = unpack_args!(args);
let Value::File(file) = file else {
return error!("file write requires a file")
};
let content = format!("{content}");
if let Err(err) = file.try_borrow_mut().unwrap().write_all(content.as_bytes()) {
return error!("cannot write file: '{err}'")
};
Ok(Value::Nil)
}
#[native_func(0..)]
fn throw(_: VmArgs, args: Vec<Value>) -> Result<Value> {
let ([], varargs) = unpack_varargs!(args);
let mut str = String::new();
for (i, v) in varargs.into_iter().enumerate() {
if i != 0 {
str.push_str(" ");
}
str.push_str(&format!("{v}"));
}
error!("{str}")
}
pub fn load(vm: &mut Vm) {
vm.load_global_fn(print(), "print");
vm.load_global_fn(println(), "println");
vm.load_global_fn(readln(), "readln");
vm.load_global_fn(input(), "input");
vm.load_global_fn(readlines(), "readlines");
vm.load_global_fn(file_open(), "file_open");
vm.load_global_fn(file_read(), "file_read");
vm.load_global_fn(file_lines(), "file_lines");
vm.load_global_fn(file_write(), "file_write");
vm.load_global_fn(throw(), "throw");
}
|
