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2015-06-16Simpler approach for entity lookup.John MacFarlane
We dispense with the hashes and just do string comparsions. Since the array is in order, we can search intelligently and should never need to do more than 8 or so comparisons. This reduces binary size even further, at a small cost in performance. (This shouldn't matter too much, as it's only detectable in really entity-heavy sources.)
2015-06-16Mark entity data structures as const.John MacFarlane
2015-06-16entities: Make the first entity in the array (TripleDot) work.John MacFarlane
We now use -1 instead of 0 to indicate leaf nodes.
2015-06-16Replace gperf-based entity lookup with binary tree lookup.John MacFarlane
The primary advantage is a big reduction in the size of the compiled library and executable (> 100K). There should be no measurable performance difference in normal documents. I detected a slight performance hit (around 5%) in a file containing 1,000,000 entities. * Removed `src/html_unescape.gperf` and `src/html_unescape.h`. * Added `src/entities.h` (generated by `tools/make_entities_h.py`). * Added binary tree lookup functions to `houdini_html_u.c`, and use the data in `src/entities.h`.