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Tim, rant: many comments sent are making genx.h more complex. My feeling is that it is already at the required level of complexity or above, and should be kept as simple or made simpler. error handling: what about not returning error conditions? Predicates (check...) return either 0 or !0, it is clear. But what's the use of error codes in writers? If it's use is in error handling, then an error_handler(void *userData, int errno) can be passed to the API. The user can easily do longjmp, exit(), abort(), or whatever there. The default error handler would perror() and exit(). David
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