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author | Hans Hagen <pragma@wxs.nl> | 2017-11-01 12:10:24 +0100 |
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committer | Context Git Mirror Bot <phg42.2a@gmail.com> | 2017-11-01 12:10:24 +0100 |
commit | 5fd6625a09421c86f7bf27efaff9a64cc5cf3d0f (patch) | |
tree | 32c7f9643a7edc077bbce72414afc7ab52e61ac7 /tex/generic/context/luatex/luatex-core.lua | |
parent | 7fc4b935d045c84e89459e726ff54ae331e4c574 (diff) | |
download | context-5fd6625a09421c86f7bf27efaff9a64cc5cf3d0f.tar.gz |
2017-11-01 12:01:00
Diffstat (limited to 'tex/generic/context/luatex/luatex-core.lua')
-rw-r--r-- | tex/generic/context/luatex/luatex-core.lua | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/tex/generic/context/luatex/luatex-core.lua b/tex/generic/context/luatex/luatex-core.lua index 870a25d48..2d6f6a73d 100644 --- a/tex/generic/context/luatex/luatex-core.lua +++ b/tex/generic/context/luatex/luatex-core.lua @@ -182,12 +182,158 @@ if md5 then end +-- compatibility + +if not unpack then + unpack = table.unpack +end + +if not package.loaders then + package.loaders = package.searchers +end + +if bit32 then + + -- lua 5.2: we're okay + +elseif utf8 then + + -- lua 5.3: bitwise.lua, v 1.24 2014/12/26 17:20:53 roberto + + bit32 = load ( [[ +local select = select -- instead of: arg = { ... } + +bit32 = { + bnot = function (a) + return ~a & 0xFFFFFFFF + end, + band = function (x, y, z, ...) + if not z then + return ((x or -1) & (y or -1)) & 0xFFFFFFFF + else + local res = x & y & z + for i=1,select("#",...) do + res = res & select(i,...) + end + return res & 0xFFFFFFFF + end + end, + bor = function (x, y, z, ...) + if not z then + return ((x or 0) | (y or 0)) & 0xFFFFFFFF + else + local res = x | y | z + for i=1,select("#",...) do + res = res | select(i,...) + end + return res & 0xFFFFFFFF + end + end, + bxor = function (x, y, z, ...) + if not z then + return ((x or 0) ~ (y or 0)) & 0xFFFFFFFF + else + local res = x ~ y ~ z + for i=1,select("#",...) do + res = res ~ select(i,...) + end + return res & 0xFFFFFFFF + end + end, + btest = function (x, y, z, ...) + if not z then + return (((x or -1) & (y or -1)) & 0xFFFFFFFF) ~= 0 + else + local res = x & y & z + for i=1,select("#",...) do + res = res & select(i,...) + end + return (res & 0xFFFFFFFF) ~= 0 + end + end, + lshift = function (a, b) + return ((a & 0xFFFFFFFF) << b) & 0xFFFFFFFF + end, + rshift = function (a, b) + return ((a & 0xFFFFFFFF) >> b) & 0xFFFFFFFF + end, + arshift = function (a, b) + a = a & 0xFFFFFFFF + if b <= 0 or (a & 0x80000000) == 0 then + return (a >> b) & 0xFFFFFFFF + else + return ((a >> b) | ~(0xFFFFFFFF >> b)) & 0xFFFFFFFF + end + end, + lrotate = function (a ,b) + b = b & 31 + a = a & 0xFFFFFFFF + a = (a << b) | (a >> (32 - b)) + return a & 0xFFFFFFFF + end, + rrotate = function (a, b) + b = -b & 31 + a = a & 0xFFFFFFFF + a = (a << b) | (a >> (32 - b)) + return a & 0xFFFFFFFF + end, + extract = function (a, f, w) + return (a >> f) & ~(-1 << (w or 1)) + end, + replace = function (a, v, f, w) + local mask = ~(-1 << (w or 1)) + return ((a & ~(mask << f)) | ((v & mask) << f)) & 0xFFFFFFFF + end, +} + ]] ) + +elseif bit then + + -- luajit (for now) + + bit32 = load ( [[ +local band, bnot, rshift, lshift = bit.band, bit.bnot, bit.rshift, bit.lshift + +bit32 = { + arshift = bit.arshift, + band = band, + bnot = bnot, + bor = bit.bor, + bxor = bit.bxor, + btest = function(...) + return band(...) ~= 0 + end, + extract = function(a,f,w) + return band(rshift(a,f),2^(w or 1)-1) + end, + lrotate = bit.rol, + lshift = lshift, + replace = function(a,v,f,w) + local mask = 2^(w or 1)-1 + return band(a,bnot(lshift(mask,f)))+lshift(band(v,mask),f) + end, + rrotate = bit.ror, + rshift = rshift, +} + ]] ) + +else + + -- hope for the best or fail + + bit32 = require("bit32") + +end + +-- so far + if utilities and utilities.merger and utilities.merger.compact then local byte, format, gmatch = string.byte, string.format, string.gmatch local concat = table.concat local data = gsub(io.loaddata('luatex-core.lua'),'if%s+utilities.*','') + local t = { } local r = { } local n = 0 |