preprocessor question (non-ANSI)

[Johann Schweigl]

How can I replace a text token by itself, along with some additional text?
Example: 
EXEC SQL select * from emp;     __curline = 23; EXEC SQL select * from emp;
before ^^^^^^^^^^^^^^^^^^^^     after ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

#define EXEC __curline = __LINE__; EXEC 
is not the solution, cpp would try to resolve EXEC recursively
I know, sed is the most natural solution, but I want to do all by including
a single file. ANSI is not spoken on my system.
Any help appreciated.
Thanks, johnny
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This does not reflect the   | Johann  Schweigl | DOS?
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