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Removed 'int' size limit for pack/unpack

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This commit is contained in:
Roberto Ierusalimschy
2024-06-21 14:55:12 -03:00
parent e24ce8c2b3
commit ec65ab878e
2 changed files with 48 additions and 38 deletions
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19
testes/tpack.lua
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@@ -135,15 +135,15 @@ checkerror("variable%-length format", packsize, "z")
-- overflow in option size (error will be in digit after limit)
checkerror("invalid format", packsize, "c1" .. string.rep("0", 40))
if packsize("i") == 4 then
-- result would be 2^31 (2^3 repetitions of 2^28 strings)
local s = string.rep("c268435456", 2^3)
checkerror("too large", packsize, s)
-- one less is OK
s = string.rep("c268435456", 2^3 - 1) .. "c268435455"
assert(packsize(s) == 0x7fffffff)
do
local maxsize = (packsize("j") <= packsize("T")) and
math.maxinteger or (1 << (packsize("T") * 8))
assert (packsize(string.format("c%d", maxsize - 9)) == maxsize - 9)
checkerror("too large", packsize, string.format("c%dc10", maxsize - 9))
checkerror("too long", pack, string.format("xxxxxxxxxx c%d", maxsize - 9))
end
-- overflow in packing
for i = 1, sizeLI - 1 do
local umax = (1 << (i * 8)) - 1
@@ -229,8 +229,9 @@ do
assert(pack("c3", "123") == "123")
assert(pack("c0", "") == "")
assert(pack("c8", "123456") == "123456\0\0")
assert(pack("c88", "") == string.rep("\0", 88))
assert(pack("c188", "ab") == "ab" .. string.rep("\0", 188 - 2))
assert(pack("c88 c1", "", "X") == string.rep("\0", 88) .. "X")
assert(pack("c188 c2", "ab", "X\1") ==
"ab" .. string.rep("\0", 188 - 2) .. "X\1")
local a, b, c = unpack("!4 z c3", "abcdefghi\0xyz")
assert(a == "abcdefghi" and b == "xyz" and c == 14)
checkerror("longer than", pack, "c3", "1234")