mirror of
https://github.com/love2d/love-android.git
synced 2026-08-14 01:20:55 +02:00
Martin Felis
81 lines
2.4 KiB
Lua
81 lines
2.4 KiB
Lua
R"luastring"--(
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-- DO NOT REMOVE THE ABOVE LINE. It is used to load this file as a C++ string.
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-- There is a matching delimiter at the bottom of the file.
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--[[
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Copyright (c) 2006-2015 LOVE Development Team
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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--]]
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local RandomGenerator_mt, ffifuncspointer = ...
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local RandomGenerator = RandomGenerator_mt.__index
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local type, tonumber, error = type, tonumber, error
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local floor = math.floor
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local _random = RandomGenerator._random
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local function getrandom(r, l, u)
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if u ~= nil then
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if type(r) ~= "number" then error("bad argument #1 to 'random' (number expected)", 2) end
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if type(l) ~= "number" then error("bad argument #2 to 'random' (number expected)", 2) end
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return floor(r * (u - l + 1)) + l
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elseif l ~= nil then
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if type(l) ~= "number" then error("bad argument #1 to 'random' (number expected)", 2) end
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return floor(r * l) + 1
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else
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return r
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end
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end
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function RandomGenerator:random(l, u)
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local r = _random(self)
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return getrandom(r, l, u)
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end
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if type(jit) ~= "table" or not jit.status() then
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-- LuaJIT's FFI is *much* slower than LOVE's regular methods when the JIT
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-- compiler is disabled.
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return
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end
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local status, ffi = pcall(require, "ffi")
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if not status then return end
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pcall(ffi.cdef, [[
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typedef struct Proxy Proxy;
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typedef struct FFI_RandomGenerator
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{
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double (*random)(Proxy *p);
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} FFI_RandomGenerator;
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]])
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local ffifuncs = ffi.cast("FFI_RandomGenerator *", ffifuncspointer)
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-- Overwrite some regular love.math functions with FFI implementations.
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function RandomGenerator:random(l, u)
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local r = tonumber(ffifuncs.random(self))
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return getrandom(r, l, u)
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end
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-- DO NOT REMOVE THE NEXT LINE. It is used to load this file as a C++ string.
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--)luastring"--"
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