/*! sheetjs (C) SheetJS -- https://sheetjs.com */ /* run code, get result as a Rust String */ fn eval_code(scope: &mut v8::HandleScope, code: &str) -> std::string::String { let source = v8::String::new(scope, &code).unwrap(); let script = v8::Script::compile(scope, source, None).unwrap(); let result = script.run(scope).unwrap(); return result.to_string(scope).unwrap().to_rust_string_lossy(scope); } /* assuming JS code returns an ArrayBuffer, copy result to a Vec<u8> */ fn eval_code_ab(scope: &mut v8::HandleScope, code: &str) -> Vec<u8> { let source = v8::String::new(scope, &code).unwrap(); let script = v8::Script::compile(scope, source, None).unwrap(); let result: v8::Local<v8::ArrayBuffer> = script.run(scope).unwrap().try_into().unwrap(); unsafe { return std::slice::from_raw_parts_mut(result.data().unwrap().cast::<u8>().as_ptr(), result.byte_length()).to_vec(); } } fn main() { /* initialize */ let platform = v8::new_default_platform(0, false).make_shared(); v8::V8::initialize_platform(platform); v8::V8::initialize(); let isolate = &mut v8::Isolate::new(Default::default()); let handle_scope = &mut v8::HandleScope::new(isolate); let context = v8::Context::new(handle_scope); let context_scope = &mut v8::ContextScope::new(handle_scope, context); /* load library */ { let script = std::fs::read_to_string("./xlsx.full.min.js").expect("Error reading xlsx.full.min.js"); let _result = eval_code(context_scope, &script); } /* get version string */ { let result = eval_code(context_scope, "XLSX.version"); println!("SheetJS library version {}", result); } /* read file */ { let path: String = std::env::args().collect::<Vec<_>>().into_iter().nth(1).unwrap().to_string(); let data: Vec<u8> = std::fs::read(path.clone()).unwrap(); let back: v8::UniqueRef<v8::BackingStore> = v8::ArrayBuffer::new_backing_store_from_vec(data); let shared = back.make_shared(); let ab: v8::Local<v8::ArrayBuffer> = v8::ArrayBuffer::with_backing_store(context_scope, &shared); let key = v8::String::new(context_scope, "buf").unwrap(); context.global(context_scope).set(context_scope, key.into(), ab.into()); println!("Loaded file {}", path); } /* parse workbook and assign to global `wb` property */ { let _result = eval_code(context_scope, "void (globalThis.wb = XLSX.read(buf))"); } /* print CSV of first worksheet */ { let result = eval_code(context_scope, "XLSX.utils.sheet_to_csv(wb.Sheets[wb.SheetNames[0]])"); println!("{}", result); } /* write sheetjsw.xlsb */ { let result = eval_code_ab(context_scope, "XLSX.write(wb, {type:'array', bookType:'xlsb'})"); std::fs::write("sheetjsw.xlsb", result).unwrap(); } }