Detect-It-Easy/db/read

// Supplemental read functions.

/**
 * Read a big-endian word.
 * @param {UInt} nOffset - The offset in the file.
 * @returns {UShort} The word value.
 * @alias Binary.readBEWord
 */
File.readBEWord = function(nOffset)
{
    return (File.readByte(nOffset) << 8) + File.readByte(nOffset+1);
}

/**
 * Read a big-endian dword.
 * @param {UInt} nOffset - The offset in the file.
 * @returns {UInt} The dword value.
 * @alias Binary.readBEDword
 */
File.readBEDword = function(nOffset)
{
    return File.swapBytes(File.readDword(nOffset));
}


/**
 * Read a word, selecting endianness.
 * @param {UInt} nOffset - The offset in the file.
 * @param {Bool} bBE - True for big-endian.
 * @returns {UShort} The word value.
 * @alias Binary.readEWord
 */
File.readEWord = function(nOffset,bBE)
{
    return bBE?File.readBEWord(nOffset):File.readWord(nOffset);
}

/**
 * Read a dword, selecting endianness.
 * @param {UInt} nOffset - The offset in the file.
 * @param {Bool} bBE - True for big-endian.
 * @returns {UInt} The dword value.
 * @alias Binary.readEDWord
 */
File.readEDword = function(nOffset,bBE)
{
    return bBE?File.readBEDword(nOffset):File.readDword(nOffset);
}


/**
 * Read a short (signed 16-bit) value.
 * @param {UInt} nOffset - The offset in the file.
 * @returns {Short} The short value.
 * @alias Binary.readShort
 */
File.readShort = function(nOffset)
{
    return (File.readWord(nOffset)<<16)>>16;
}