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util/bitcompat.lua

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util/bitcompat.lua @ 12115:94de6b7596cc

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author Kim Alvefur <zash@zash.se>
date Thu, 23 Dec 2021 14:08:20 +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
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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2
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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3 -- First try the bit32 lib
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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4 -- Lua 5.3 has it with compat enabled
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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5 -- Lua 5.2 has it by default
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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6 if _G.bit32 then
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Kim Alvefur <zash@zash.se>
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7 return _G.bit32;
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Kim Alvefur <zash@zash.se>
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8 else
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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9 -- Lua 5.1 may have it as a standalone module that can be installed
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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10 local ok, bitop = pcall(require, "bit32")
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
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11 if ok then
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12 return bitop;
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13 end
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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14 end
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15
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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16 do
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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17 -- Lua 5.3 and 5.4 would be able to use native infix operators
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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18 local ok, bitop = pcall(require, "util.bit53")
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
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19 if ok then
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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20 return bitop;
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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21 end
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Kim Alvefur <zash@zash.se>
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22 end
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
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23
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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24 do
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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25 -- Lastly, try the LuaJIT bitop library
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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26 local ok, bitop = pcall(require, "bit")
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27 if ok then
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Kim Alvefur <zash@zash.se>
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28 return bitop;
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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29 end
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Kim Alvefur <zash@zash.se>
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30 end
48f7cda4174d util.bitops: Library to find appropriate bitwise library (closes #1395)
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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";