>Ahem, are you certain vfp currency is not up to the job ? IIRC it is an 8-byte signend integer with an "arbitrary" set decimal point resulting in 4 decimals. So if you are certain you will not have any decimals, you can eliminate or "shift" the 4 decimals. And if it is only for hash codes, where probably the only questions asked are == and !=, why not implement in C and just save the result, either as 2 integers or currency or in this case my favorite varchar binary ? Last one can grow above 8 byte length if the collision area needs to be reduced by enlarging hash result abd function....
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>curious
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>thomas

Currency is stored in VFP as a 64-bit integer with 4-implied decimals. It holds 18-19 decimals of precision. There's a warning in the VFP Help under System Capacities that it can compute a maximum of 15-16 significant digits of accuracy, as it uses an internal 64-bit floating point value to carry out calculations.

The bignum.vcx class could be extended to create a bigint subset, allowing for arbitrary precision integers. GMP is good for that, and the same code could wrap around it for the integer portion.

See attached for the bignum C/C++ source code (not including the bigint subset).