SYS(2007) Algorithm for Checksum
ID: Q101289
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The information in this article applies to:
- Microsoft FoxPro for Windows, versions 2.5, 2.5a, 2.5b
- Microsoft FoxPro for MS-DOS, versions 2.0, 2.5, 2.5a, 2.5b
- Microsoft FoxPro for Macintosh, version 2.5b
The SYS(2007) function returns the checksum value of the character expression <expC>. The correct syntax is SYS(2007,<expC>). A checksum can be used to test the validity of data or to compare two character expressions.
NOTE: Checksum is a "byte-oriented CRC-16" algorithm. The exact logic was last published in the February 1986 edition of "Dr. Dobbs Journal."
Additional query words: FoxMac FoxDos FoxWin check sum
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