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oxc.rs
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oxc.rs
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use std::ffi::{c_char, c_int, CStr};
use std::path::Path;
use std::ptr;
use oxc_allocator::Allocator;
use oxc_codegen::Codegen;
use oxc_parser::Parser;
use oxc_semantic::SemanticBuilder;
use oxc_span::SourceType;
use oxc_transformer::{TransformOptions, Transformer, TypeScriptOptions};
pub const OXC_ERR_NULL_INPUT: c_int = -1;
pub const OXC_ERR_INVALID_UTF8: c_int = -2;
pub const OXC_ERR_TRANSFORM_FAILED: c_int = -4;
pub const OXC_ERR_OUTPUT_TOO_LARGE: c_int = -5;
#[unsafe(no_mangle)]
pub unsafe extern "C" fn OXC_strip_types(
input: *const c_char,
filename: *const c_char,
output: *mut c_char,
output_len: usize,
) -> c_int {
if input.is_null() || output.is_null() {
return OXC_ERR_NULL_INPUT;
}
let filename_str = match unsafe { CStr::from_ptr(filename).to_str() } {
Ok(s) => s,
Err(_) => return OXC_ERR_INVALID_UTF8,
};
let input_str = match unsafe { CStr::from_ptr(input).to_str() } {
Ok(s) => s,
Err(_) => return OXC_ERR_INVALID_UTF8,
};
match strip_types_internal(input_str, filename_str) {
Ok(result) => {
let bytes = result.as_bytes();
if bytes.len() + 1 > output_len { return OXC_ERR_OUTPUT_TOO_LARGE; }
unsafe {
ptr::copy_nonoverlapping(bytes.as_ptr(), output as *mut u8, bytes.len());
*output.add(bytes.len()) = 0;
}
bytes.len() as c_int
}
Err(_) => OXC_ERR_TRANSFORM_FAILED,
}
}
fn strip_types_internal(source: &str, filename: &str) -> Result<String, String> {
let allocator = Allocator::default();
let source_type = SourceType::from_path(filename).unwrap_or_else(|_| SourceType::ts());
let parser_ret = Parser::new(&allocator, source, source_type).parse();
if !parser_ret.errors.is_empty() {
let errors: Vec<String> = parser_ret.errors.iter().map(|e| e.to_string()).collect();
return Err(format!("Parse errors: {}", errors.join("; ")));
}
let mut program = parser_ret.program;
let semantic_ret = SemanticBuilder::new().build(&program);
if !semantic_ret.errors.is_empty() {
let errors: Vec<String> = semantic_ret.errors.iter().map(|e| e.to_string()).collect();
return Err(format!("Semantic errors: {}", errors.join("; ")));
}
let scoping = semantic_ret.semantic.into_scoping();
let transform_options = TransformOptions {
typescript: TypeScriptOptions {
only_remove_type_imports: true,
..Default::default()
},
..Default::default()
};
let source_path = Path::new(filename);
let transformer = Transformer::new(&allocator, source_path, &transform_options);
let ret = transformer.build_with_scoping(scoping, &mut program);
if !ret.errors.is_empty() {
let errors: Vec<String> = ret.errors.iter().map(|e| e.to_string()).collect();
return Err(format!("Transform errors: {}", errors.join("; ")));
}
let output = Codegen::new().build(&program).code;
Ok(output)
}

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