bops/typedarray/read.js

buffer operations

module.exports = {
    readUInt8:      read_uint8
  , readInt8:       read_int8
  , readUInt16LE:   read_uint16_le
  , readUInt32LE:   read_uint32_le
  , readInt16LE:    read_int16_le
  , readInt32LE:    read_int32_le
  , readFloatLE:    read_float_le
  , readDoubleLE:   read_double_le
  , readUInt16BE:   read_uint16_be
  , readUInt32BE:   read_uint32_be
  , readInt16BE:    read_int16_be
  , readInt32BE:    read_int32_be
  , readFloatBE:    read_float_be
  , readDoubleBE:   read_double_be
}

var map = require('./mapped.js')

function read_uint8(target, at) {
  return target[at]
}

function read_int8(target, at) {
  var v = target[at];
  return v < 0x80 ? v : v - 0x100
}

function read_uint16_le(target, at) {
  var dv = map.get(target);
  return dv.getUint16(at + target.byteOffset, true)
}

function read_uint32_le(target, at) {
  var dv = map.get(target);
  return dv.getUint32(at + target.byteOffset, true)
}

function read_int16_le(target, at) {
  var dv = map.get(target);
  return dv.getInt16(at + target.byteOffset, true)
}

function read_int32_le(target, at) {
  var dv = map.get(target);
  return dv.getInt32(at + target.byteOffset, true)
}

function read_float_le(target, at) {
  var dv = map.get(target);
  return dv.getFloat32(at + target.byteOffset, true)
}

function read_double_le(target, at) {
  var dv = map.get(target);
  return dv.getFloat64(at + target.byteOffset, true)
}

function read_uint16_be(target, at) {
  var dv = map.get(target);
  return dv.getUint16(at + target.byteOffset, false)
}

function read_uint32_be(target, at) {
  var dv = map.get(target);
  return dv.getUint32(at + target.byteOffset, false)
}

function read_int16_be(target, at) {
  var dv = map.get(target);
  return dv.getInt16(at + target.byteOffset, false)
}

function read_int32_be(target, at) {
  var dv = map.get(target);
  return dv.getInt32(at + target.byteOffset, false)
}

function read_float_be(target, at) {
  var dv = map.get(target);
  return dv.getFloat32(at + target.byteOffset, false)
}

function read_double_be(target, at) {
  var dv = map.get(target);
  return dv.getFloat64(at + target.byteOffset, false)
}