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util/bitcompat.lua @ 12518:73ee3855f970
mod_smacks: Factor out some convenience functions
Those lines are long and the risk of mistakes if another one needs to be
added seems high, but lower when factored out like this.
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 11 Feb 2022 16:09:42 +0100 |
parent | 10241:48f7cda4174d |
child | 12573:0f4feaf9ca64 |
rev | line source |
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10241
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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1 -- Compatibility layer for bitwise operations |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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2 |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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3 -- First try the bit32 lib |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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4 -- Lua 5.3 has it with compat enabled |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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5 -- Lua 5.2 has it by default |
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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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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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7 return _G.bit32; |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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8 else |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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9 -- Lua 5.1 may have it as a standalone module that can be installed |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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10 local ok, bitop = pcall(require, "bit32") |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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11 if ok then |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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12 return bitop; |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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13 end |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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14 end |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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15 |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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16 do |
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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 |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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18 local ok, bitop = pcall(require, "util.bit53") |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
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19 if ok then |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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20 return bitop; |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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parents:
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21 end |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
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22 end |
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23 |
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24 do |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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25 -- Lastly, try the LuaJIT bitop library |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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parents:
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26 local ok, bitop = pcall(require, "bit") |
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Kim Alvefur <zash@zash.se>
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27 if ok then |
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28 return bitop; |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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29 end |
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Kim Alvefur <zash@zash.se>
parents:
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30 end |
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Kim Alvefur <zash@zash.se>
parents:
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31 |
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util.bitops: Library to find appropriate bitwise library (closes #1395)
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32 error "No bit module found. See https://prosody.im/doc/depends#bitop"; |