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authorKim Alvefur <zash@zash.se>2020-11-05 22:31:25 +0100
committerKim Alvefur <zash@zash.se>2020-11-05 22:31:25 +0100
commit238b2bfc1cdb65ae7d051c2f29c1427149317795 (patch)
tree58547de6e7795740633c1b93e67c217eb621fe8f /util/bitcompat.lua
parentce3e3808f5359f481f3ea063220ba71428b26ad5 (diff)
parent48521ba1538f797f5bef64f5fe5f3a9fb6e68f7f (diff)
downloadprosody-238b2bfc1cdb65ae7d051c2f29c1427149317795.tar.gz
prosody-238b2bfc1cdb65ae7d051c2f29c1427149317795.zip
Merge 0.11->trunk
Diffstat (limited to 'util/bitcompat.lua')
-rw-r--r--util/bitcompat.lua32
1 files changed, 32 insertions, 0 deletions
diff --git a/util/bitcompat.lua b/util/bitcompat.lua
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index 00000000..454181af
--- /dev/null
+++ b/util/bitcompat.lua
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+-- Compatibility layer for bitwise operations
+
+-- First try the bit32 lib
+-- Lua 5.3 has it with compat enabled
+-- Lua 5.2 has it by default
+if _G.bit32 then
+ return _G.bit32;
+else
+ -- Lua 5.1 may have it as a standalone module that can be installed
+ local ok, bitop = pcall(require, "bit32")
+ if ok then
+ return bitop;
+ end
+end
+
+do
+ -- Lua 5.3 and 5.4 would be able to use native infix operators
+ local ok, bitop = pcall(require, "util.bit53")
+ if ok then
+ return bitop;
+ end
+end
+
+do
+ -- Lastly, try the LuaJIT bitop library
+ local ok, bitop = pcall(require, "bit")
+ if ok then
+ return bitop;
+ end
+end
+
+error "No bit module found. See https://prosody.im/doc/depends#bitop";