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util/bit53.lua @ 13222:cb6a17eaa0e6
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author | Kim Alvefur <zash@zash.se> |
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date | Tue, 18 Jul 2023 11:53:12 +0200 |
parent | 12365:af02b033bd7f |
rev | line source |
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10241
48f7cda4174d
util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
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1 -- Only the operators needed by net.websocket.frames are provided at this point |
48f7cda4174d
util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
2 return { |
12365
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
3 band = function (a, b, ...) |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
4 local ret = a & b; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
5 if ... then |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
6 for i = 1, select("#", ...) do |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
7 ret = ret & (select(i, ...)); |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
8 end |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
9 end |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
10 return ret; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
11 end; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
12 bor = function (a, b, ...) |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
13 local ret = a | b; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
14 if ... then |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
15 for i = 1, select("#", ...) do |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
16 ret = ret | (select(i, ...)); |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
17 end |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
18 end |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
19 return ret; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
20 end; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
21 bxor = function (a, b, ...) |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
22 local ret = a ~ b; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
23 if ... then |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
24 for i = 1, select("#", ...) do |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
25 ret = ret ~ (select(i, ...)); |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
26 end |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
27 end |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
28 return ret; |
af02b033bd7f
util.bit53: Support for more than 2 arguments, for compat with bit32
Matthew Wild <mwild1@gmail.com>
parents:
12358
diff
changeset
|
29 end; |
12358
d77d8fba44ad
util.bit53: Add left- and right shift operations
Kim Alvefur <zash@zash.se>
parents:
10241
diff
changeset
|
30 rshift = function (a, n) return a >> n end; |
d77d8fba44ad
util.bit53: Add left- and right shift operations
Kim Alvefur <zash@zash.se>
parents:
10241
diff
changeset
|
31 lshift = function (a, n) return a << n end; |
10241
48f7cda4174d
util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
32 }; |
48f7cda4174d
util.bitops: Library to find appropriate bitwise library (closes #1395)
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
|
33 |