On 4/4/2020 10:29 AM, Charles Mills wrote:
Let's say you were writing a report generator. You are processing data of
unknown quality using field definitions generated by inexperienced
programmers, and report programs written by non-programmers. You might
expect a fair number of arithmetic operations on packed fields that
contained invalid data, and a fair number of divisions by zero. Let's posit
that ABENDing on the first such condition is not acceptable to user
management.
Would you use ESPIE to trap S0C7's and S0C9's, or would you validate the
data with explicit "hand-coded" tests before every arithmetic operation?
The TP (TEST DECIMAL) instruction comes in handy here...
--
Phoenix Software International
Edward E. Jaffe
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El Segundo, CA 90245
https://www.phoenixsoftware.com/
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