Example Decompiled Program
FLEXERRS is the standard error message data
entry program provided by Data
Access Corporation. The source code for the
FLEXERRS program is provided on the DataFlex development
diskette.
Both the original source
code and its decompiled source
are available here.
Some features to look for in the decompiled program:
- All variables are declared at the top of the program,
even indicators.
- The generated source code follows standard indenting
practices.
- Some features, such as autopage and name
definitions, are lost at compile-time.
- The original code used START: as a label,
whereas the decompiled code used CL6: as a label.
Label names are lost at compile-time.
- The original program uses a goto command
to jump to the START: label, whereas
the decompiled program surrounds the block with a
repeat/loop structure. This is just one
way that the decompiled code is better than the original
code. Compiling the decompiled program will
generate a program that is still functionally identical
to the original program.
- Keyproc labels are retained.
- Predefined indicators and system variables, such
as ERR and FOUND, are retained in the
decompiled program.
- The left-hand margin of the decompiled code starts
on column 22. This leaves room for labels and
indicators on the line. This formatting method
makes it easier to read large decompiled programs.
More Information:
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