JRecord

File Formats

As well as supporting the standard files (where some line terminator [Unix: /n]) denotes the end of the line. This package can support other formats (normally length based lines).

Length based files have 2 advantages over typical unix/windows text files:

1. When reading, you do not need to check every byte in the file for a <CR>. For a 600 byte line you are probably executing 1800 instructions per line to work out the length. With a length based file it it will be a couple of instructions,
2. Ideal for storing binary data - Saves the conversion cost of converting numbers between text & Binary (in 3rd generation languages like C and Cobol).

Formats Currently Supported

• Standard Unix/Windows/Mac lines.
• Fixed Record Length (ie every record is the same fixed length.
• Mainframe VB (was also used on other computers as well) - 2 Byte length at the start of the line + two byte hex zero.
• Mainframe VB Dump (sames as VB but also including the the Block Discriptor Word).
• Fujitsu Cobol VB format. 4 byte length at the start and end of the line.

JRecord at SourceForge

Download Page

Forums