Dear R developers, since nobody has pointed me to an existing solution so far, here is a more specific suggestion. Attached you will find two patches against R version 2.2.0.
The first patch does two things: 1) Add a function R_WriteErrConsole similar to R_WriteConsole, and a corresponding ptr_R_WriteErrConsole. 2) Make inError, inWarning, and inPrintWarnings from errors.c accessible (read-only) in R_ext/Error.h I believe these changes to be minimally invasive. I did not test-compile on windows, but the change in gnuwin32 should be trivial. The second patch adds a test/example to tests/Embedding, showing how this added API can be used to identify warnings and errors in the output stream. If you need any further comments / different format of patches, or anything else in order to evaluate this proposal, please let me know. Thanks! Thomas
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