• Import can read any file as a sequence of signed 128-bit integers.
  • Export writes a list of integers in the range to a binary file.
  • Background

      Uniform sequence of signed 128-bit integers.
      Binary data format.

    Import and Export

    • Import["file","Integer128"] imports an arbitrary file as a sequence of 128-bit integers, returning a packed array of integers in the range .
    • Export["file",list,"Integer128"] exports a list of integers in the range to a sequence of binary 128-bit numbers.
    • Import["file",{"Integer128",elem}] or Import["file",elem ] imports the specified element from file.
    • Import["file",{"Integer128",{elem1,elem2,}}] imports multiple elements.
    • See the reference pages for full general information on Import and Export.
    • ImportString and ExportString support the Integer128 format.


    • General Import elements:
    • "Elements" elements and options available in this file
      "Rules"full rules for each element and option
      "Options"rules for options, properties, and settings
    • Data representation element:
    • "Data"list of integers in the range
    • By default, Import and Export use the "Data" element.
    • Import["file",{"Integer128",n}] gives the n^(th) 128-bit integer.
    • Trailing bytes are ignored if the size of the imported file is not a multiple of the data size.


    • General option:
    • ByteOrdering-1what byte ordering to use
    • Import option:
    • "HeaderBytes"0how many bytes to skip at the beginning of the file


    Basic Examples  (1)

    Convert a list of integers to a string representing a sequence of binary 128-bit integers:

    Click for copyable input

    In the previous output, each exported integer is taking up 16 bytes:

    Click for copyable input

    Convert the binary data back to an expression:

    Click for copyable input

    Import the same data, assuming it represents an array of unsigned integers:

    Click for copyable input

    See Also

    "Binary"  "Bit"  "Byte"  "Character8"  "Character16"  "Integer8"  "Integer16"  "Integer24"  "Integer32"  "Integer64"  "UnsignedInteger8"  "UnsignedInteger16"  "UnsignedInteger24"  "UnsignedInteger32"  "UnsignedInteger64"  "UnsignedInteger128"  "Real32"  "Real64"  "Real128"  "Complex64"  "Complex128"  "Complex256"  "String"

    Introduced in 2004
    | Updated in 2007