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luau/tests/conformance/buffers.lua
Lily Brown e5ec0cdff3
Sync to upstream/release/601 (#1084) 
## What's changed

- `bit32.byteswap` added
([RFC](4f543ec23b/docs/function-bit32-byteswap.md))
- Buffer library implementation
([RFC](4f543ec23b/docs/type-byte-buffer.md))
- Fixed a missing `stdint.h` include
- Fixed parser limiter for recursive type annotations being kind of
weird (fixes #645)

### Native Codegen
- Fixed a pair of issues when lowering `bit32.extract`
- Fixed a narrow edge case that could result in an infinite loop without
an interruption
- Fixed a negative array out-of-bounds access issue
- Temporarily reverted linear block predecessor value propagation

### New type solver
- We now type check assignments to annotated variables
- Fixed some test cases under local type inference
- Moved `isPending` checks for type families to improve performance
- Optimized our process for testing if a free type is sufficiently
solved
- Removed "none ptr" from lea instruction disassembly logging

### Build system & tooling
- CMake configuration now validates dependencies to maintain separation
between components
- Improvements to the fuzzer coverage
- Deduplicator for fuzzed callstacks

---------

Co-authored-by: Arseny Kapoulkine <arseny.kapoulkine@gmail.com>
Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
Co-authored-by: Andy Friesen <afriesen@roblox.com>
Co-authored-by: Aaron Weiss <aaronweiss@roblox.com>
Co-authored-by: Vighnesh Vijay <vvijay@roblox.com>
2023-10-27 14:18:41 -07:00

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-- This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
print("testing byte buffer library")
function call(fn, ...)
local ok, res = pcall(fn, ...)
assert(ok)
return res
end
function ecall(fn, ...)
local ok, err = pcall(fn, ...)
assert(not ok)
return err:sub((err:find(": ") or -1) + 2, #err)
end
local function simple_byte_reads()
local b = buffer.create(1024)
assert(buffer.len(b) == 1024)
assert(buffer.readi8(b, 5) == 0)
buffer.writei8(b, 10, 32)
assert(buffer.readi8(b, 10) == 32)
buffer.writei8(b, 15, 5)
buffer.writei8(b, 14, 4)
buffer.writei8(b, 13, 3)
buffer.writei8(b, 12, 2)
buffer.writei8(b, 11, 1)
assert(buffer.readi8(b, 11) == 1)
assert(buffer.readi8(b, 12) == 2)
assert(buffer.readi8(b, 13) == 3)
assert(buffer.readi8(b, 14) == 4)
assert(buffer.readi8(b, 15) == 5)
local x = buffer.readi8(b, 14) + buffer.readi8(b, 13)
assert(x == 7)
end
simple_byte_reads()
local function offset_byte_reads(start: number)
local b = buffer.create(1024)
buffer.writei8(b, start, 32)
assert(buffer.readi8(b, start) == 32)
buffer.writei8(b, start + 5, 5)
buffer.writei8(b, start + 4, 4)
buffer.writei8(b, start + 3, 3)
buffer.writei8(b, start + 2, 2)
buffer.writei8(b, start + 1, 1)
assert(buffer.readi8(b, start + 1) == 1)
assert(buffer.readi8(b, start + 2) == 2)
assert(buffer.readi8(b, start + 3) == 3)
assert(buffer.readi8(b, start + 4) == 4)
assert(buffer.readi8(b, start + 5) == 5)
local x = buffer.readi8(b, start + 4) + buffer.readi8(b, start + 3)
assert(x == 7)
end
offset_byte_reads(5)
offset_byte_reads(30)
local function simple_float_reinterpret()
local b = buffer.create(1024)
buffer.writei32(b, 10, 0x3f800000)
local one = buffer.readf32(b, 10)
assert(one == 1.0)
buffer.writef32(b, 10, 2.75197)
local magic = buffer.readi32(b, 10)
assert(magic == 0x40302047)
end
simple_float_reinterpret()
local function simple_double_reinterpret()
local b = buffer.create(1024)
buffer.writei32(b, 10, 0x00000000)
buffer.writei32(b, 14, 0x3ff00000)
local one = buffer.readf64(b, 10)
assert(one == 1.0)
buffer.writef64(b, 10, 1.437576533064206)
local magic1 = buffer.readi32(b, 10)
local magic2 = buffer.readi32(b, 14)
assert(magic1 == 0x40302010)
assert(magic2 == 0x3ff70050)
end
simple_double_reinterpret()
local function simple_string_ops()
local b = buffer.create(1024)
buffer.writestring(b, 15, " world")
buffer.writestring(b, 10, "hello")
buffer.writei8(b, 21, string.byte('!'))
assert(buffer.readstring(b, 10, 12) == "hello world!")
buffer.writestring(b, 10, "hellommm", 5)
assert(buffer.readstring(b, 10, 12) == "hello world!")
buffer.writestring(b, 10, string.rep("hellommm", 1000), 5)
assert(buffer.readstring(b, 10, 12) == "hello world!")
end
simple_string_ops()
local function simple_copy_ops()
local b1 = buffer.create(1024)
local b2 = buffer.create(1024)
buffer.writestring(b1, 200, "hello")
buffer.writestring(b1, 100, "world")
buffer.copy(b1, 300, b1, 100, 5)
buffer.writei8(b2, 35, string.byte(' '))
buffer.writei8(b2, 41, string.byte('!'))
buffer.copy(b2, 30, b1, 200, 5)
buffer.copy(b2, 36, b1, 300, 5)
assert(buffer.readstring(b2, 30, 12) == "hello world!")
local b3 = buffer.create(9)
buffer.writestring(b3, 0, "say hello")
buffer.copy(b2, 36, b3, 4)
assert(buffer.readstring(b2, 30, 12) == "hello hello!")
local b4 = buffer.create(5)
buffer.writestring(b4, 0, "world")
buffer.copy(b2, 36, b4)
assert(buffer.readstring(b2, 30, 12) == "hello world!")
buffer.writestring(b1, 200, "abcdefgh");
buffer.copy(b1, 200, b1, 202, 6)
assert(buffer.readstring(b1, 200, 8) == "cdefghgh")
buffer.copy(b1, 202, b1, 200, 6)
assert(buffer.readstring(b1, 200, 8) == "cdcdefgh")
end
simple_copy_ops()
-- bounds checking
local function createchecks()
assert(ecall(function() buffer.create(-1) end) == "size cannot be negative")
assert(ecall(function() buffer.create(-1000000) end) == "size cannot be negative")
end
createchecks()
local function boundchecks()
local b = buffer.create(1024)
assert(call(function() return buffer.readi8(b, 1023) end) == 0)
assert(ecall(function() buffer.readi8(b, 1024) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, -100000) end) == "buffer access out of bounds")
call(function() buffer.writei8(b, 1023, 0) end)
assert(ecall(function() buffer.writei8(b, 1024, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, -100000, 0) end) == "buffer access out of bounds")
-- i16
assert(call(function() return buffer.readi16(b, 1022) end) == 0)
assert(ecall(function() buffer.readi16(b, 1023) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, -100000) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, 0x7fffffff) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, 0x7ffffffe) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, 0x7ffffffd) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, 0x80000000) end) == "buffer access out of bounds")
call(function() buffer.writei16(b, 1022, 0) end)
assert(ecall(function() buffer.writei16(b, 1023, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, -100000, 0) end) == "buffer access out of bounds")
-- i32
assert(call(function() return buffer.readi32(b, 1020) end) == 0)
assert(ecall(function() buffer.readi32(b, 1021) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, -100000) end) == "buffer access out of bounds")
call(function() buffer.writei32(b, 1020, 0) end)
assert(ecall(function() buffer.writei32(b, 1021, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, -100000, 0) end) == "buffer access out of bounds")
-- f32
assert(call(function() return buffer.readf32(b, 1020) end) == 0)
assert(ecall(function() buffer.readf32(b, 1021) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, -100000) end) == "buffer access out of bounds")
call(function() buffer.writef32(b, 1020, 0) end)
assert(ecall(function() buffer.writef32(b, 1021, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, -100000, 0) end) == "buffer access out of bounds")
-- f64
assert(call(function() return buffer.readf64(b, 1016) end) == 0)
assert(ecall(function() buffer.readf64(b, 1017) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, -100000) end) == "buffer access out of bounds")
call(function() buffer.writef64(b, 1016, 0) end)
assert(ecall(function() buffer.writef64(b, 1017, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, -100000, 0) end) == "buffer access out of bounds")
-- string
assert(call(function() return buffer.readstring(b, 1016, 8) end) == "\0\0\0\0\0\0\0\0")
assert(ecall(function() buffer.readstring(b, 1017, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, -1, -8) end) == "size cannot be negative")
assert(ecall(function() buffer.readstring(b, -100000, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, -100000, 8) end) == "buffer access out of bounds")
call(function() buffer.writestring(b, 1016, "abcdefgh") end)
assert(ecall(function() buffer.writestring(b, 1017, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, -1, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, -100000, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, 100, "abcd", -5) end) == "count cannot be negative")
assert(ecall(function() buffer.writestring(b, 100, "abcd", 50) end) == "string length overflow")
-- copy
assert(ecall(function() buffer.copy(b, 30, b, 200, 1000) end) == "buffer access out of bounds")
assert(ecall(function() buffer.copy(b, 30, b, 200, -5) end) == "buffer access out of bounds")
assert(ecall(function() buffer.copy(b, 30, b, 2000, 10) end) == "buffer access out of bounds")
assert(ecall(function() buffer.copy(b, 30, b, -1, 10) end) == "buffer access out of bounds")
assert(ecall(function() buffer.copy(b, 30, b, -10, 10) end) == "buffer access out of bounds")
assert(ecall(function() buffer.copy(b, 30, b, -100000, 10) end) == "buffer access out of bounds")
local b2 = buffer.create(1024)
assert(ecall(function() buffer.copy(b, -200, b, 200, 200) end) == "buffer access out of bounds")
assert(ecall(function() buffer.copy(b, 825, b, 200, 200) end) == "buffer access out of bounds")
end
boundchecks()
local function boundchecksnonconst(size, minus1, minusbig, intmax)
local b = buffer.create(size)
assert(call(function() return buffer.readi8(b, size-1) end) == 0)
assert(ecall(function() buffer.readi8(b, size) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, minus1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, minusbig) end) == "buffer access out of bounds")
call(function() buffer.writei8(b, size-1, 0) end)
assert(ecall(function() buffer.writei8(b, size, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, minus1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, minusbig, 0) end) == "buffer access out of bounds")
-- i16
assert(call(function() return buffer.readi16(b, size-2) end) == 0)
assert(ecall(function() buffer.readi16(b, size-1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, minus1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, minusbig) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, intmax) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, intmax-1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, intmax-2) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, intmax+1) end) == "buffer access out of bounds")
call(function() buffer.writei16(b, size-2, 0) end)
assert(ecall(function() buffer.writei16(b, size-1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, minus1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, minusbig, 0) end) == "buffer access out of bounds")
-- i32
assert(call(function() return buffer.readi32(b, size-4) end) == 0)
assert(ecall(function() buffer.readi32(b, size-3) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, minus1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, minusbig) end) == "buffer access out of bounds")
call(function() buffer.writei32(b, size-4, 0) end)
assert(ecall(function() buffer.writei32(b, size-3, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, minus1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, minusbig, 0) end) == "buffer access out of bounds")
-- f32
assert(call(function() return buffer.readf32(b, size-4) end) == 0)
assert(ecall(function() buffer.readf32(b, size-3) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, minus1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, minusbig) end) == "buffer access out of bounds")
call(function() buffer.writef32(b, size-4, 0) end)
assert(ecall(function() buffer.writef32(b, size-3, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, minus1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, minusbig, 0) end) == "buffer access out of bounds")
-- f64
assert(call(function() return buffer.readf64(b, size-8) end) == 0)
assert(ecall(function() buffer.readf64(b, size-7) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, minus1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, minusbig) end) == "buffer access out of bounds")
call(function() buffer.writef64(b, size-8, 0) end)
assert(ecall(function() buffer.writef64(b, size-7, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, minus1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, minusbig, 0) end) == "buffer access out of bounds")
-- string
assert(call(function() return buffer.readstring(b, size-8, 8) end) == "\0\0\0\0\0\0\0\0")
assert(ecall(function() buffer.readstring(b, size-7, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, minus1, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, minusbig, 8) end) == "buffer access out of bounds")
call(function() buffer.writestring(b, size-8, "abcdefgh") end)
assert(ecall(function() buffer.writestring(b, size-7, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, minus1, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, minusbig, "abcdefgh") end) == "buffer access out of bounds")
end
boundchecksnonconst(1024, -1, -100000, 0x7fffffff)
local function boundcheckssmall()
local b = buffer.create(1)
assert(call(function() return buffer.readi8(b, 0) end) == 0)
assert(ecall(function() buffer.readi8(b, 1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, -1) end) == "buffer access out of bounds")
call(function() buffer.writei8(b, 0, 0) end)
assert(ecall(function() buffer.writei8(b, 1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, -1, 0) end) == "buffer access out of bounds")
-- i16
assert(ecall(function() buffer.readi16(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, -2) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, 0, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei16(b, -2, 0) end) == "buffer access out of bounds")
-- i32
assert(ecall(function() buffer.readi32(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, -4) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, 0, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei32(b, -4, 0) end) == "buffer access out of bounds")
-- f32
assert(ecall(function() buffer.readf32(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, -4) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, 0, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef32(b, -4, 0) end) == "buffer access out of bounds")
-- f64
assert(ecall(function() buffer.readf64(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, -8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, 0, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writef64(b, -7, 0) end) == "buffer access out of bounds")
-- string
assert(ecall(function() buffer.readstring(b, 0, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, -1, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, -8, 8) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, 0, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, -1, "abcdefgh") end) == "buffer access out of bounds")
assert(ecall(function() buffer.writestring(b, -7, "abcdefgh") end) == "buffer access out of bounds")
end
boundcheckssmall()
local function boundchecksempty()
local b = buffer.create(0) -- useless, but probably more generic
assert(ecall(function() buffer.readi8(b, 1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi8(b, -1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, 1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, 0, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.writei8(b, -1, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi16(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readi32(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf32(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readf64(b, 0) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, 0, 1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.readstring(b, 0, 8) end) == "buffer access out of bounds")
end
boundchecksempty()
local function intuint()
local b = buffer.create(32)
buffer.writeu32(b, 0, 0xffffffff)
assert(buffer.readi8(b, 0) == -1)
assert(buffer.readu8(b, 0) == 255)
assert(buffer.readi16(b, 0) == -1)
assert(buffer.readu16(b, 0) == 65535)
assert(buffer.readi32(b, 0) == -1)
assert(buffer.readu32(b, 0) == 4294967295)
buffer.writei32(b, 0, -1)
assert(buffer.readi8(b, 0) == -1)
assert(buffer.readu8(b, 0) == 255)
assert(buffer.readi16(b, 0) == -1)
assert(buffer.readu16(b, 0) == 65535)
assert(buffer.readi32(b, 0) == -1)
assert(buffer.readu32(b, 0) == 4294967295)
buffer.writei16(b, 0, 65535)
buffer.writei16(b, 2, -1)
assert(buffer.readi8(b, 0) == -1)
assert(buffer.readu8(b, 0) == 255)
assert(buffer.readi16(b, 0) == -1)
assert(buffer.readu16(b, 0) == 65535)
assert(buffer.readi32(b, 0) == -1)
assert(buffer.readu32(b, 0) == 4294967295)
buffer.writeu16(b, 0, 65535)
buffer.writeu16(b, 2, -1)
assert(buffer.readi8(b, 0) == -1)
assert(buffer.readu8(b, 0) == 255)
assert(buffer.readi16(b, 0) == -1)
assert(buffer.readu16(b, 0) == 65535)
assert(buffer.readi32(b, 0) == -1)
assert(buffer.readu32(b, 0) == 4294967295)
end
intuint()
local function intuinttricky()
local b = buffer.create(32)
buffer.writeu8(b, 0, 0xffffffff)
assert(buffer.readi8(b, 0) == -1)
assert(buffer.readu8(b, 0) == 255)
assert(buffer.readi16(b, 0) == 255)
assert(buffer.readu16(b, 0) == 255)
assert(buffer.readi32(b, 0) == 255)
assert(buffer.readu32(b, 0) == 255)
buffer.writeu16(b, 0, 0xffffffff)
assert(buffer.readi8(b, 0) == -1)
assert(buffer.readu8(b, 0) == 255)
assert(buffer.readi16(b, 0) == -1)
assert(buffer.readu16(b, 0) == 65535)
assert(buffer.readi32(b, 0) == 65535)
assert(buffer.readu32(b, 0) == 65535)
buffer.writei32(b, 8, 0xffffffff)
buffer.writeu32(b, 12, 0xffffffff)
assert(buffer.readstring(b, 8, 4) == buffer.readstring(b, 12, 4))
buffer.writei32(b, 8, -2147483648)
buffer.writeu32(b, 12, 0x80000000)
assert(buffer.readstring(b, 8, 4) == buffer.readstring(b, 12, 4))
end
intuinttricky()
local function fromtostring()
local b = buffer.fromstring("1234567890")
assert(buffer.tostring(b) == "1234567890")
buffer.writestring(b, 4, "xyz")
assert(buffer.tostring(b) == "1234xyz890")
local b2 = buffer.fromstring("abcd\0ef")
assert(buffer.tostring(b2) == "abcd\0ef")
end
fromtostring()
local function fill()
local b = buffer.create(10)
buffer.fill(b, 0, 0x61)
assert(buffer.tostring(b) == "aaaaaaaaaa")
buffer.fill(b, 0, 0x62, 5)
assert(buffer.tostring(b) == "bbbbbaaaaa")
buffer.fill(b, 4, 0x63)
assert(buffer.tostring(b) == "bbbbcccccc")
buffer.fill(b, 6, 0x64, 3)
assert(buffer.tostring(b) == "bbbbccdddc")
buffer.fill(b, 2, 0xffffff65, 8)
assert(buffer.tostring(b) == "bbeeeeeeee")
-- out of bounds
assert(ecall(function() buffer.fill(b, -10, 1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.fill(b, 11, 1) end) == "buffer access out of bounds")
assert(ecall(function() buffer.fill(b, 0, 1, 11) end) == "buffer access out of bounds")
assert(ecall(function() buffer.fill(b, 5, 1, 6) end) == "buffer access out of bounds")
assert(ecall(function() buffer.fill(b, 5, 1, -1) end) == "buffer access out of bounds")
end
fill()
local function misc()
local b = buffer.create(1000)
assert(select('#', buffer.writei32(b, 10, 40)) == 0)
assert(select('#', buffer.writef32(b, 20, 40.0)) == 0)
end
misc()
local function testslowcalls()
getfenv()
simple_byte_reads()
offset_byte_reads(5)
offset_byte_reads(30)
simple_float_reinterpret()
simple_double_reinterpret()
simple_string_ops()
createchecks()
boundchecks()
boundchecksnonconst(1024, -1, -100000, 0x7fffffff)
boundcheckssmall()
boundchecksempty()
intuint()
intuinttricky()
fromtostring()
fill()
misc()
end
testslowcalls()
return('OK')
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