fileinput.hx

来自「ocaml编写的一个flash编译器」· HX 代码 · 共 87 行

/*
 * Copyright (c) 2005, The haXe Project Contributors
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE HAXE PROJECT CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE HAXE PROJECT CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package neko.io;
import neko.io.File;

/**
	Use [neko.io.File.read] to create a [FileInput]
**/
class FileInput extends Input {

	private var __f : FileHandle;

	public function new(f) {
		__f = f;
	}

	public override function readChar() : Int {
		return try {
			file_read_char(__f);
		} catch( e : Dynamic ) {
			if( untyped __dollar__typeof(e) == __dollar__tarray )
				throw new Eof();
			else
				throw Error.Custom(e);
		}
	}

	public override function readBytes( s : String, p : Int, l : Int ) : Int {
		return try {
			file_read(__f,untyped s.__s,p,l);
		} catch( e : Dynamic ) {
			if( untyped __dollar__typeof(e) == __dollar__tarray )
				throw new Eof();
			else
				throw Error.Custom(e);
		}
	}

	public override function close() {
		super.close();
		file_close(__f);
	}

	public function seek( p : Int, pos : FileSeek ) {
		file_seek(__f,p,switch( pos ) { case SeekBegin: 0; case SeekCur: 1; case SeekEnd: 2; });
	}

	public function tell() : Int {
		return file_tell(__f);
	}

	public function eof() : Bool {
		return file_eof(__f);
	}

	private static var file_read = neko.Lib.load("std","file_read",4);
	private static var file_read_char = neko.Lib.load("std","file_read_char",1);

	private static var file_close = neko.Lib.load("std","file_close",1);
	private static var file_seek = neko.Lib.load("std","file_seek",3);
	private static var file_tell = neko.Lib.load("std","file_tell",1);
	private static var file_eof = neko.Lib.load("std","file_eof",1);

}