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/*
* Copyright (C)2005-2014 Haxe Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package js.html.compat;
import haxe.io.Error;
@:keep
@:access(js.html.compat.ArrayBuffer)
class DataView {
var buf : ArrayBuffer;
var offset : Int;
var length : Int;
public function new( buffer : ArrayBuffer, ?byteOffset : Int, ?byteLength : Int ) : Void {
this.buf = buffer;
this.offset = byteOffset == null ? 0 : byteOffset;
this.length = byteLength == null ? buffer.byteLength - this.offset : byteLength;
if( offset < 0 || length < 0 || offset+length > buffer.byteLength )
throw OutsideBounds;
}
public function getInt8( byteOffset : Int ) : Int {
var v = buf.a[offset + byteOffset];
return v >= 0x80 ? v - 256 : v;
}
public function getUint8( byteOffset : Int ) : Int {
return buf.a[offset + byteOffset];
}
public function getInt16( byteOffset : Int, ?littleEndian : Bool ) : Int {
var v = getUint16(byteOffset, littleEndian);
return v >= 0x8000 ? v - 65536 : v;
}
public function getUint16( byteOffset : Int, ?littleEndian : Bool ) : Int {
return littleEndian ? buf.a[offset + byteOffset] | (buf.a[offset + byteOffset + 1] << 8) : (buf.a[offset + byteOffset]<<8) | buf.a[offset + byteOffset + 1];
}
public function getInt32( byteOffset : Int, ?littleEndian : Bool ) : Int {
var p = offset + byteOffset;
var a = buf.a[p++];
var b = buf.a[p++];
var c = buf.a[p++];
var d = buf.a[p++];
return littleEndian ? a | (b<<8) | (c<<16) | (d<<24) : d | (c << 8) | (b << 16) | (a << 24);
}
public function getUint32( byteOffset : Int, ?littleEndian : Bool ) : Int {
var v = getInt32(byteOffset, littleEndian);
return v < 0 ? cast (v + 4294967296.) : v;
}
public function getFloat32( byteOffset : Int, ?littleEndian : Bool ) : Float {
return haxe.io.FPHelper.i32ToFloat(getInt32(byteOffset,littleEndian));
}
public function getFloat64( byteOffset : Int, ?littleEndian : Bool ) : Float {
var a = getInt32(byteOffset, littleEndian);
var b = getInt32(byteOffset + 4, littleEndian);
return haxe.io.FPHelper.i64ToDouble(littleEndian?a:b,littleEndian?b:a);
}
public function setInt8( byteOffset : Int, value : Int ) : Void {
buf.a[byteOffset + offset] = (value < 0) ? (value + 128) & 0xFF : value & 0xFF;
}
public function setUint8( byteOffset : Int, value : Int ) : Void {
buf.a[byteOffset + offset] = value & 0xFF;
}
public function setInt16( byteOffset : Int, value : Int, ?littleEndian : Bool ) : Void {
setUint16(byteOffset, value < 0 ? value + 65536 : value, littleEndian);
}
public function setUint16( byteOffset : Int, value : Int, ?littleEndian : Bool ) : Void {
var p = byteOffset + offset;
if( littleEndian ) {
buf.a[p] = value&0xFF;
buf.a[p++] = (value>>8) & 0xFF;
} else {
buf.a[p++] = (value>>8) & 0xFF;
buf.a[p] = value&0xFF;
}
}
public function setInt32( byteOffset : Int, value : Int, ?littleEndian : Bool ) : Void {
setUint32(byteOffset, value, littleEndian);
}
public function setUint32( byteOffset : Int, value : Int, ?littleEndian : Bool ) : Void {
var p = byteOffset + offset;
if( littleEndian ) {
buf.a[p++] = value & 0xFF;
buf.a[p++] = (value>>8) & 0xFF;
buf.a[p++] = (value>>16) & 0xFF;
buf.a[p++] = value >>> 24;
} else {
buf.a[p++] = value >>> 24;
buf.a[p++] = (value>>16) & 0xFF;
buf.a[p++] = (value>>8) & 0xFF;
buf.a[p++] = value & 0xFF;
}
}
public function setFloat32( byteOffset : Int, value : Float, ?littleEndian : Bool ) : Void {
setUint32(byteOffset, haxe.io.FPHelper.floatToI32(value),littleEndian);
}
public function setFloat64( byteOffset : Int, value : Float, ?littleEndian : Bool ) : Void {
var i64 = haxe.io.FPHelper.doubleToI64(value);
if( littleEndian ) {
setUint32(byteOffset, i64.low);
setUint32(byteOffset, i64.high);
} else {
setUint32(byteOffset, i64.high);
setUint32(byteOffset, i64.low);
}
}
static function __init__() {
var DataView = untyped js.Lib.global.DataView || js.html.compat.DataView;
}
}
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