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util/build.lua: lose packing, use fread(), make bound-check nan-safe.

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git-svn-id: https://svn.eduke32.com/eduke32@4046 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2013-09-05 17:37:40 +00:00
parent 7543ba7226
commit 3b69417792
1 changed files with 15 additions and 16 deletions
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31
polymer/eduke32/source/lunatic/util/build.lua
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@ -18,7 +18,6 @@ local tonumber = tonumber
module(...)
ffi.cdef[[
#pragma pack(push,1)
typedef struct
{
int16_t wallptr, wallnum;
@ -58,7 +57,10 @@ typedef struct
int16_t ang, owner, xvel, yvel, zvel;
int16_t lotag, hitag, extra;
} spritetype;
#pragma pack(pop)
]]
ffi.cdef[[
size_t fread(void *ptr, size_t size, size_t nmemb, void *stream);
]]
local C = ffi.C
@ -74,30 +76,25 @@ MAX =
}
local function doread(fh, basectype, numelts)
local cd = ffi.new(basectype.."[?]", numelts)
local size = ffi.sizeof(cd)
if (numelts==0) then
return nil
end
assert(size % numelts == 0)
local datstr = fh:read(size)
local cd = ffi.new(basectype.."[?]", numelts)
local size = ffi.sizeof(basectype)*numelts
if (datstr == nil or #datstr < size) then
if (C.fread(cd, ffi.sizeof(basectype), numelts, fh) ~= numelts) then
fh:close()
return nil
end
ffi.copy(cd, datstr, size)
return cd
end
local function set_secwalspr_mt(structar, maxidx)
local mt = {
__index = function(tab, idx)
if (idx < 0 or idx >= maxidx) then
if (not (idx >= 0 and idx < maxidx)) then
error("Invalid structure array read access", 2)
end
return structar[idx]
@ -281,9 +278,11 @@ function loadboard(filename, do_canonicalize_sprite)
return nil, "Invalid number of sprites"
end
map.sprite = doread(fh, "spritetype", map.numsprites)
if (map.numsprites~=0 and map.sprite == nil) then
return nil, "Couldn't read sprites"
if (map.numsprites ~= 0) then
map.sprite = doread(fh, "spritetype", map.numsprites)
if (map.sprite == nil) then
return nil, "Couldn't read sprites"
end
end
fh:close()
@ -306,14 +305,14 @@ end
local function set_sizarray_mt(sizar)
local mt = {
__index = function(tab, idx)
if (idx < 0 or idx >= MAX.TILES) then
if (not (idx >= 0 and idx < MAX.TILES)) then
error("Invalid tile size array read access", 2)
end
return sizar[idx]
end,
__newindex = function(tab, idx, newval)
if (idx < 0 or idx >= MAX.TILES) then
if (not (idx >= 0 and idx < MAX.TILES)) then
error("Invalid tile size array write access", 2)
end
sizar[idx] = newval