What changed in EDuke32, build by build

So that symbolic tile names can be used when searching maps.

The redundant ones are in code like this: s->cstat = (int16_t)32768; Because the value is eventually converted to the type of "s->cstat", any casts to integral types having at least as many bits are no-ops, signedness being irrelevant due to (probably any two's complement arch targeting compiler's) bit-pattern preserving semantics of these conversions. The now incorrect one is: if (lotag == (int16_t) 65535), "int32_t lotag" being read from a wall or sprite struct directly earlier. Now, with these members being unsigned, and (int16_t)65535 equalling -1, the check always fails. The correction fixes normal switches having such a lotag ending the level immediately. In short: integer casts before assignments are unnecessary, those in reads highly relevant!

Rewriting them in the obvious way, i.e. by casting the expression to int16_t first. (That is, this commit is the reverse of r3174, but with casts applied.) This fixes at least one regression: a FIREEXT with a hitag of 0 should not be linked with same- (that is, zero-) tagged SEENINEs or OOZFILTERs. Mind the corner cases!

- provide functions instead of messing with CONTROL_*Binds directly - comment out a few more unused functions - make clear what memory (alloc'd or const char *) 'keybind' members use - for keys with no name, use "<?>"

This function also changed: it doesn't handle floor-aligned sprites now, and the z offset is returned instead of set by pointer.

Using non-keypad [-]/[+] or LMB + mousewheel, it was broken when a void tile was in between.

This means that the internal change done to these sprite members in r3159 is hidden from CON for backward-compatibility purposes. Note that .cstat and .{ceiling,floor}stat aren't touched, and will return unsigned values to CON.

Described here: http://forums.duke4.net/topic/3857-the-crash-thread/page__view__findpost__p__141202

Also, add a missing "pragma pack(pop)" to build.lua.

I think this may fix some negative "non-profiled overhead" that I have been seeing.

http://forums.duke4.net/topic/6031-eduke32-crashes-if-hrp-model-skin-not-available/

- Eliminate use of the C++ standard library from arttool. I improved some of the program's workings but it continues to corrupt my art files in certain circumstances. (Note: Not a regression; it happens with previous revisions.) - Construct "make utils" for the game side following the pattern of the engine. - Move ivfrate to this new distinction. - Minor Makefile cleanup and tweaks, mainly to facilitate CLANG=1 and to formalize text output in special cases.

I think there's also a fix for the CON precache system breakage in here (lost it in my local tree when I started getting the C++ build working in MSVC, sorry!)

Specifically, if the first wall of the sector-to-split is to the left or right of the *start* of the splitting line AND the sector has no TROR extensions, make these two the new nextwalls of the respective split sectors.

Exporting only (de)compression functions. Also, different reader/writer functions can be set.

It would be something like "ProjectileData\[([^]]+)]\.([a-z_]+)".

This requires ripping out the .proj member of tiledata_t back into ProjectileData[] again because it was the only one in g_tile[] that changed during the course of a game. The g_tile[] array is now also correctly flagged as "constant throughout a game" (DS_NOCHK). Savegame version bumped.

It's still not pretty though since there's no interpolation from G_DrawRooms().

On the engine side (functions starting with L_), there are now the basic parts like state creation and running code from strings and files. The game and editor can add to that by e.g. loading whatever they please into the state. Their functions start with El_ and Em_, respectively. The Lua scripts still reside in source/lunatic, even for the common ones. This is because they will be embedded into the binaries as bytecode or compressed source eventually, so their location on disk will be irrelevant.

See the next commit for details.