mirror of
https://github.com/DrBeef/Raze.git
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120 lines
2.9 KiB
Lua
120 lines
2.9 KiB
Lua
-- Bound-checking functions for engine and game "things".
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local ffiC = require("ffi").C
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local type = type
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local error = error
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local bcheck = {}
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--== ENGINE ==--
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function bcheck.sector_idx(sectnum)
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if (not (sectnum >= 0 and sectnum < ffiC.numsectors)) then
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error("invalid sector number "..sectnum, 3)
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end
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end
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function bcheck.wall_idx(wallnum)
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if (not (wallnum >= 0 and wallnum < ffiC.numwalls)) then
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error("invalid wall number "..wallnum, 3)
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end
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end
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-- TODO: Provide another function that also checks whether the sprite exists in
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-- the game world (statnum != MAXSTATUS).
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function bcheck.sprite_idx(spritenum)
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-- if (not (spritenum >= 0 and spritenum < ffiC.MAXSPRITES)) then
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if (not (spritenum >= 0 and spritenum < ffiC.MAXSPRITES)) then
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error("invalid sprite number "..spritenum, 3)
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end
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end
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function bcheck.tile_idx(tilenum)
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if (not (tilenum >= 0 and tilenum < ffiC.MAXTILES)) then
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error("invalid tile number "..tilenum, 3)
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end
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end
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--== HELPERS ==--
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function bcheck.number(val, errlev)
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if (type(val)~="number" or val~=val) then
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error("invalid argument: must be a non-NaN number", errlev or 3)
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end
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end
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function bcheck.type(val, typestr, errlev)
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if (type(val)~=typestr) then
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error("invalid argument: must be a "..typestr, errlev or 3)
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end
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end
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--== GAME ==--
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if (ffiC.LUNATIC_CLIENT == ffiC.LUNATIC_CLIENT_MAPSTER32) then
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return bcheck
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end
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local con_lang = require("con_lang")
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function bcheck.player_idx(snum)
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if (not (snum >= 0 and snum < ffiC.playerswhenstarted)) then
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error("invalid player number "..snum, 3)
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end
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end
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function bcheck.sound_idx(sndidx)
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if (not (sndidx >= 0 and sndidx < con_lang.MAXSOUNDS)) then
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error("invalid sound number "..sndidx, 3)
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end
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end
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function bcheck.weapon_idx(weap)
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if (not (weap >= 0 and weap < ffiC.MAX_WEAPONS)) then
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error("Invalid weapon ID "..weap, 3)
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end
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end
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function bcheck.inventory_idx(inv)
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if (not (inv >= 0 and inv < ffiC.GET_MAX)) then
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error("Invalid inventory ID "..inv, 3)
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end
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end
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function bcheck.volume_idx(volume)
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if (not (volume >= 0 and volume < con_lang.MAXVOLUMES)) then
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error("invalid volume number "..volume, 3)
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end
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end
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function bcheck.level_idx(level)
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if (not (level >= 0 and level < con_lang.MAXLEVELS)) then
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error("invalid level number "..level, 3)
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end
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end
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function bcheck.quote_idx(qnum, onlyidx)
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if (not (qnum >= 0 and qnum < con_lang.MAXQUOTES)) then
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error("invalid quote number "..qnum, 3)
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end
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local cstr = ffiC.ScriptQuotes[qnum]
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if (onlyidx) then
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return cstr
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end
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if (cstr == nil) then
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error("null quote "..qnum, 3)
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end
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return cstr
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end
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function bcheck.top_level(funcname, errlev)
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if (ffiC.g_elCallDepth > 0) then
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error("Invalid use of "..funcname..": must be called from top level", errlev or 3)
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end
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end
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return bcheck
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