hollerith-codec/lib/tng.js.map

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    "\n\n'use strict'\n\n\n#===========================================================================================================\n# \n#-----------------------------------------------------------------------------------------------------------\nclass @Hollerith_codec\n\n  #---------------------------------------------------------------------------------------------------------\n  constructor: ->\n    @sign_delta  = 0x80000000  ### used to lift negative numbers to non-negative ###\n    @u32_width   = 4           ### bytes per element ###\n    @vnr_width   = 5           ### maximum elements in VNR vector ###\n    @nr_min      = -0x80000000 ### smallest possible VNR element ###\n    @nr_max      = +0x7fffffff ### largest possible VNR element ###\n    return undefined\n\n  #---------------------------------------------------------------------------------------------------------\n  encode: ( vnr ) ->\n    unless 0 < vnr.length <= @vnr_width\n      throw new Error \"^44798^ expected VNR to be between 1 and #{@vnr_width} elements long, got length #{vnr.length}\"\n    R           = Buffer.alloc @vnr_width * @u32_width, 0x00 ### TAINT pre-compute constant ###\n    offset      = -@u32_width\n    for idx in [ 0 ... @vnr_width ]\n      R.writeUInt32BE ( vnr[ idx ] ? 0 ) + @sign_delta, ( offset += @u32_width )\n    return R\n\n  #---------------------------------------------------------------------------------------------------------\n  _encode_bcd: ( vnr ) ->\n    vnr_width   = 5           ### maximum elements in VNR vector ###\n    dpe         = 4           ### digits per element ###\n    base        = 36\n    plus        = '+'\n    minus       = '!'\n    padder      = '.'\n    R           = []\n    for idx in [ 0 ... vnr_width ]\n      nr    = vnr[ idx ] ? 0\n      sign  = if nr >= 0 then plus else minus\n      R.push sign + ( ( Math.abs nr ).toString base ).padStart dpe, padder\n    R           = R.join ','\n    return R\n\n#===========================================================================================================\n@HOLLERITH_CODEC = new @Hollerith_codec()\n\n\n\n"
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