prosody
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util/bitcompat.lua

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util/bitcompat.lua @ 11240:0f7ecc9a4560

mod_component: Distinguish missing stream @to from unknown local component (thanks Daniel_W) Spectrum2 did not include a stream @to attribute due to a configuration error. "nil does not match ..." is not very clear in pointing this out and is somewhat confusing, tho it did help pinpoint what went wrong. It's also not great leak to programming language internals like "nil" out into user-facing strings like this.
author Kim Alvefur <zash@zash.se>
date Fri, 18 Dec 2020 22:29:44 +0100
parent 10241:48f7cda4174d
child 12573:0f4feaf9ca64
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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10241
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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1 -- Compatibility layer for bitwise operations
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2
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3 -- First try the bit32 lib
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4 -- Lua 5.3 has it with compat enabled
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5 -- Lua 5.2 has it by default
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
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6 if _G.bit32 then
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7 return _G.bit32;
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8 else
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9 -- Lua 5.1 may have it as a standalone module that can be installed
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Kim Alvefur <zash@zash.se>
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10 local ok, bitop = pcall(require, "bit32")
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11 if ok then
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12 return bitop;
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13 end
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14 end
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15
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16 do
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17 -- Lua 5.3 and 5.4 would be able to use native infix operators
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18 local ok, bitop = pcall(require, "util.bit53")
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19 if ok then
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20 return bitop;
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21 end
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22 end
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23
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24 do
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25 -- Lastly, try the LuaJIT bitop library
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26 local ok, bitop = pcall(require, "bit")
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27 if ok then
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28 return bitop;
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29 end
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30 end
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31
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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32 error "No bit module found. See https://prosody.im/doc/depends#bitop";