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18765d0032
Undefined because (png_byte) << shift is undefined if it changes the signed bit (because png_byte is promoted to int). The libpng exported functions png_get_uint_32 and png_get_uint_16 handle this. Bug reported by David Drysdale as a result of reports from UBSAN in clang 3.8. This changes pngvalid to use BE random numbers; this used to produce errors but these should not be fixed as a result of the previous changes. Signed-off-by: John Bowler <jbowler@acm.org>
This "contrib" directory contains contributions which are not necessarily under the libpng license, although all are open source. They are not part of libpng proper and are not used for building the library, although some are used for testing the library via "make check".