Allow for a nicer fallback in case of syntax errors in thepattern implementation while avoiding negative valuesmasquerading as positive ones. While at it, make sure that in nonLP64 environments UINT32_MAX is still considered valid.Update the data implementation to behave similarly and cleanupfixes that had accumlated unorganically.

Use realloc() for exponential resize of all buffers, which has theadvantage of potentially not needing to copy.Add a parameter to `expand_input_buffers()` to indicate the minimumsize required and allow a smarter fallback when the buffer can'tbe doubled.