This is a small lua module. Can unpack and package iso8583 messages.

• Install
• API
  • Constant
  • new
  • Pack
  • Unpack

$ git clone git@github.com:yaolaiyaoqu/iso8583.git
$ cd iso8583
$ make

To specify the Lua version, use -e LUA_VERSION=xxx. The default Lua version is 5.1.

$ git clone git@github.com:yaolaiyaoqu/iso8583.git
$ cd iso8583
$ make -e LUA_VERSION=5.4

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local iso8583 = require('iso8583');

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There are following constant in the module:

• iso8583.FIX
• iso8583.LLVAR
• iso8583.LLLVAR
• iso8583.RIGHT
• iso8583.R
• iso8583.LEFT
• iso8583.L
• iso8583.U
• iso8583.UNZIP
• iso8583.Z
• iso8583.ZIP
• iso8583.LLVAR_U
• iso8583.LLLVAR_U

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syntax: obj, err = iso8583.new(fields)

Creates an iso8583 object. In case of failures, returns nil and a string describing the error.

The fields is an array of lua tables holding the following keys:

• size

  The size of the field.

• type

  The type of the field, it must be FIX, LLVAR, LLLVAR, LLVAR_U, LLLVAR_U. U means ASCII prefix.

• align

  Align of the field, it must be R, L.

• pad

  Pad character of the field.

• compress

  U or Z, Z means BCD data, U means BIN data.

The default definition of fields is in iso8583.c.

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syntax: message, err = obj:Pack(data)

Pack iso8583 data to message. In case of failures, returns nil and a string describing the error.

The parameter data is an array that stores ISO8583 data, where the value of data[1] is either "0" or "1".

• "0" means bitmap64 is used.

• "1" means bitmap128 is used.

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syntax: data, err = obj:Unpack(message)

Unpack message to iso8583 data. In case of failures, returns nil and a string describing the error.

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