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|
use std::fs;
use crate::native::{self, NativeFunction, NativeFunctionResult};
use crate::value::{Object, ObjectType, Primitive};
use crate::VM;
fn file_read(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
let Some(Primitive::Object(ptr)) = args.get(0).cloned() else {
return Err(native::Error::InvalidArgument);
};
let object = vm
.objects()
.get(ptr as usize)
.ok_or(native::Error::InvalidArgument)?;
let ObjectType::String(str) = &object.typ else {
return Err(native::Error::InvalidArgument);
};
let contents = fs::read_to_string(str).expect("IO Error: Failed to read file!");
let object = Object::new(ObjectType::String(contents));
let ptr = vm.objects_mut().allocate(object);
Ok(Primitive::Object(ptr as u32))
}
pub const FILE_READ: NativeFunction = NativeFunction {
name: "file$read",
function: file_read,
arity: 1,
returns_value: true,
doc: Some(
"NativeFunction file$read: \n\targs: path (str)\n\tdesc: Returns the contents of a file \
at <path>\n\tExample: `var todo = file$read('/home/sloth/todo.txt'); # Assuming the \
contents of todo.txt are 'Take a nap' then todo = 'Take a nap'`",
),
};
fn file_write(vm: &mut VM, args: &[Primitive]) -> NativeFunctionResult {
let Some(Primitive::Object(path_ptr)) = args.get(0).cloned() else {
return Err(native::Error::InvalidArgument);
};
let path_object = vm
.objects()
.get(path_ptr as usize)
.ok_or(native::Error::InvalidArgument)?;
let ObjectType::String(path) = &path_object.typ else {
return Err(native::Error::InvalidArgument);
};
let Some(Primitive::Object(content_ptr)) = args.get(1).cloned() else {
return Err(native::Error::InvalidArgument);
};
let content_object = vm
.objects()
.get(content_ptr as usize)
.ok_or(native::Error::InvalidArgument)?;
let ObjectType::String(content) = &content_object.typ else {
return Err(native::Error::InvalidArgument);
};
let _ = fs::write(path, content);
Ok(Primitive::Empty)
}
pub const FILE_WRITE: NativeFunction = NativeFunction {
name: "file$write",
function: file_write,
arity: 2,
returns_value: false,
doc: Some(
"NativeFunction file$write: \n\targs: path (str), content (str)\n\tdesc: Writes <content> \
to file at <path>\n\tExample: `file$write('/home/sloth/todo.txt', 'Take a nap'); # \
todo.txt now contains the string 'Take a nap'`",
),
};
|
