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mbyte_spec.lua
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local t = require('test.unit.testutil')
local itp = t.gen_itp(it)
local ffi = t.ffi
local eq = t.eq
local to_cstr = t.to_cstr
local lib = t.cimport(
'./src/nvim/mbyte.h',
'./src/nvim/charset.h',
'./src/nvim/grid.h',
'./src/nvim/option_vars.h'
)
describe('mbyte', function()
-- Convert from bytes to string
local function to_string(bytes)
local s = {}
for i = 1, #bytes do
s[i] = string.char(bytes[i])
end
return table.concat(s)
end
before_each(function() end)
itp('utf_ptr2char', function()
-- For strings with length 1 the first byte is returned.
for c = 0, 255 do
eq(c, lib.utf_ptr2char(to_string({ c, 0 })))
end
-- Some ill formed byte sequences that should not be recognized as UTF-8
-- First byte: 0xc0 or 0xc1
-- Second byte: 0x80 .. 0xbf
--eq(0x00c0, lib.utf_ptr2char(to_string({0xc0, 0x80})))
--eq(0x00c1, lib.utf_ptr2char(to_string({0xc1, 0xbf})))
--
-- Sequences with more than four bytes
end)
for n = 0, 0xF do
itp(('utf_char2bytes for chars 0x%x - 0x%x'):format(n * 0x1000, n * 0x1000 + 0xFFF), function()
local char_p = ffi.typeof('char[?]')
for c = n * 0x1000, n * 0x1000 + 0xFFF do
local p = char_p(4, 0)
lib.utf_char2bytes(c, p)
eq(c, lib.utf_ptr2char(p))
eq(lib.vim_iswordc(c), lib.vim_iswordp(p))
end
end)
end
describe('utfc_ptr2schar', function()
local function test_seq(seq)
local firstc = ffi.new('int[1]')
local buf = ffi.new('char[32]')
lib.schar_get(buf, lib.utfc_ptr2schar(to_string(seq), firstc))
local str = ffi.string(buf)
if 1 > 2 then -- for debugging
local tbl = {}
for i = 1, #str do
table.insert(tbl, string.format('0x%02x', string.byte(str, i)))
end
print('{ ' .. table.concat(tbl, ', ') .. ' }')
io.stdout:flush()
end
return { str, firstc[0] }
end
local function byte(val)
return { string.char(val), val }
end
itp('1-byte sequences', function()
eq({ '', 0 }, test_seq { 0 })
for c = 1, 127 do
eq(byte(c), test_seq { c })
end
for c = 128, 255 do
eq({ '', c }, test_seq { c })
end
end)
itp('2-byte sequences', function()
-- No combining characters
eq(byte(0x7f), test_seq { 0x7f, 0x7f })
-- No combining characters
eq(byte(0x7f), test_seq { 0x7f, 0x80 })
-- No UTF-8 sequence
eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f })
-- One UTF-8 character
eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80 })
-- No UTF-8 sequence
eq({ '', 0xc2 }, test_seq { 0xc2, 0xc0 })
end)
itp('3-byte sequences', function()
-- No second UTF-8 character
eq(byte(0x7f), test_seq { 0x7f, 0x80, 0x80 })
-- No combining character
eq(byte(0x7f), test_seq { 0x7f, 0xc2, 0x80 })
-- Combining character is U+0300
eq({ '\x29\xcc\x80', 0x29 }, test_seq { 0x29, 0xcc, 0x80 })
-- invalid start byte for combining
eq({ '\x7f', 0x7f }, test_seq { 0x7f, 0xcc, 0x80 })
-- No UTF-8 sequence
eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f, 0xcc })
-- Incomplete combining character
eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80, 0xcc })
-- One UTF-8 character (composing only)
eq({ ' \xe2\x83\x90', 0x20d0 }, test_seq { 0xe2, 0x83, 0x90 })
end)
itp('4-byte sequences', function()
-- No following combining character
eq(byte(0x7f), test_seq { 0x7f, 0x7f, 0xcc, 0x80 })
eq(byte(0x29), test_seq { 0x29, 0x29, 0xcc, 0x80 })
-- No second UTF-8 character
eq(byte(0x7f), test_seq { 0x7f, 0xc2, 0xcc, 0x80 })
-- Combining character U+0300
eq({ '\x29\xcc\x80', 0x29 }, test_seq { 0x29, 0xcc, 0x80, 0xcc })
-- No UTF-8 sequence
eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f, 0xcc, 0x80 })
-- No following UTF-8 character
eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0xcc })
-- Combining character U+0301
eq({ '\xc2\xbc\xcc\x81', 0xbc }, test_seq { 0xc2, 0xbc, 0xcc, 0x81 })
-- U+0080 : not a valid start char
eq({ '\xc2\x80', 0x80 }, test_seq { 0xc2, 0x80, 0xcc, 0x81 })
-- One UTF-8 character
eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80 })
end)
itp('5+-byte sequences', function()
-- No following combining character
eq(byte(0x7f), test_seq { 0x7f, 0x7f, 0xcc, 0x80, 0x80 })
-- No second UTF-8 character
eq(byte(0x7f), test_seq { 0x7f, 0xc2, 0xcc, 0x80, 0x80 })
-- Combining character U+0300
eq({ '\x29\xcc\x80', 0x29 }, test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x00 })
-- Combining characters U+0300 and U+0301
eq({ '\x29\xcc\x80\xcc\x81', 0x29 }, test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x81 })
-- Combining characters U+0300, U+0301, U+0302
eq(
{ '\x29\xcc\x80\xcc\x81\xcc\x82', 0x29 },
test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82 }
)
-- Combining characters U+0300, U+0301, U+0302, U+0303
eq(
{ '\x29\xcc\x80\xcc\x81\xcc\x82\xcc\x83', 0x29 },
test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xcc, 0x83 }
)
-- Combining characters U+0300, U+0301, U+0302, U+0303, U+0304
eq(
{ '\x29\xcc\x80\xcc\x81\xcc\x82\xcc\x83\xcc\x84', 0x29 },
test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xcc, 0x83, 0xcc, 0x84 }
)
-- Combining characters U+0300, U+0301, U+0302, U+0303, U+0304, U+0305
eq(
{ '\x29\xcc\x80\xcc\x81\xcc\x82\xcc\x83\xcc\x84\xcc\x85', 0x29 },
test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xcc, 0x83, 0xcc, 0x84, 0xcc, 0x85 }
)
-- Combining characters U+0300, U+0301, U+0302, U+0303, U+0304, U+0305, U+0306
eq(
{ '\x29\xcc\x80\xcc\x81\xcc\x82\xcc\x83\xcc\x84\xcc\x85\xcc\x86', 0x29 },
test_seq {
0x29,
0xcc,
0x80,
0xcc,
0x81,
0xcc,
0x82,
0xcc,
0x83,
0xcc,
0x84,
0xcc,
0x85,
0xcc,
0x86,
}
)
-- Only three following combining characters U+0300, U+0301, U+0302
eq(
{ '\x29\xcc\x80\xcc\x81\xcc\x82', 0x29 },
test_seq { 0x29, 0xcc, 0x80, 0xcc, 0x81, 0xcc, 0x82, 0xc2, 0x80, 0xcc, 0x84, 0xcc, 0x85 }
)
-- No UTF-8 sequence
eq({ '', 0xc2 }, test_seq { 0xc2, 0x7f, 0xcc, 0x80, 0x80 })
-- No following UTF-8 character
eq({ '\xc2\xbc', 0xbc }, test_seq { 0xc2, 0xbc, 0xcc, 0xcc, 0x80 })
-- Combining character U+0301
eq({ '\xc2\xbc\xcc\x81', 0xbc }, test_seq { 0xc2, 0xbc, 0xcc, 0x81, 0x7f })
-- Combining character U+0301
eq({ '\xc2\xbc\xcc\x81', 0xbc }, test_seq { 0xc2, 0xbc, 0xcc, 0x81, 0xcc })
-- One UTF-8 character
eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80, 0x7f })
-- One UTF-8 character
eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80, 0x80 })
-- One UTF-8 character
eq({ '\xf4\x80\x80\x80', 0x100000 }, test_seq { 0xf4, 0x80, 0x80, 0x80, 0xcc })
-- Combining characters U+1AB0 and U+0301
eq(
{ '\xf4\x80\x80\x80\xe1\xaa\xb0\xcc\x81', 0x100000 },
test_seq { 0xf4, 0x80, 0x80, 0x80, 0xe1, 0xaa, 0xb0, 0xcc, 0x81 }
)
end)
end)
describe('utf_cp_bounds_len', function()
local tests = {
{
name = 'for valid string',
str = 'iÀiiⱠiⱠⱠ𐀀i',
offsets = {
b = { 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 1, 2, 0, 1, 2, 0, 1, 2, 3, 0 },
e = { 1, 2, 1, 1, 1, 3, 2, 1, 1, 3, 2, 1, 3, 2, 1, 4, 3, 2, 1, 1 },
},
},
{
name = 'for string with incomplete sequence',
str = 'i\xC3iÀⱠiÀ\xE2\xB1Ⱡ\xF0\x90\x80',
offsets = {
b = { 0, 0, 0, 0, 1, 0, 1, 2, 0, 0, 1, 0, 0, 0, 1, 2, 0, 0, 0 },
e = { 1, 1, 1, 2, 1, 3, 2, 1, 1, 2, 1, 1, 1, 3, 2, 1, 1, 1, 1 },
},
},
{
name = 'for string with trailing bytes after multibyte',
str = 'iÀ\xA0Ⱡ\xA0Ⱡ𐀀\xA0i',
offsets = {
b = { 0, 0, 1, 0, 0, 1, 2, 0, 0, 1, 2, 0, 1, 2, 3, 0, 0 },
e = { 1, 2, 1, 1, 3, 2, 1, 1, 3, 2, 1, 4, 3, 2, 1, 1, 1 },
},
},
}
for _, test in ipairs(tests) do
itp(test.name, function()
local cstr = to_cstr(test.str)
local b_offsets, e_offsets = {}, {}
for i = 1, #test.str do
local result = lib.utf_cp_bounds_len(cstr, cstr + i - 1, #test.str - (i - 1))
table.insert(b_offsets, result.begin_off)
table.insert(e_offsets, result.end_off)
end
eq(test.offsets, { b = b_offsets, e = e_offsets })
end)
end
itp('does not read before start', function()
local str = '𐀀'
local expected_offsets = { b = { 0, 0, 0 }, e = { 1, 1, 1 } }
local cstr = to_cstr(str) + 1
local b_offsets, e_offsets = {}, {}
for i = 1, 3 do
local result = lib.utf_cp_bounds_len(cstr, cstr + i - 1, 3 - (i - 1))
table.insert(b_offsets, result.begin_off)
table.insert(e_offsets, result.end_off)
end
eq(expected_offsets, { b = b_offsets, e = e_offsets })
end)
itp('does not read past the end', function()
local str = '𐀀'
local expected_offsets = { b = { 0, 0, 0 }, e = { 1, 1, 1 } }
local cstr = to_cstr(str)
local b_offsets, e_offsets = {}, {}
for i = 1, 3 do
local result = lib.utf_cp_bounds_len(cstr, cstr + i - 1, 3 - (i - 1))
table.insert(b_offsets, result.begin_off)
table.insert(e_offsets, result.end_off)
end
eq(expected_offsets, { b = b_offsets, e = e_offsets })
end)
end)
itp('utf_head_off', function()
local function check(str, expected_glyphs)
local len = #str
local cstr = to_cstr(str)
local breaks = { 0 } -- SOT
local pos = 0
local mb_glyphs = {}
while pos < len do
local clen = lib.utfc_ptr2len(cstr + pos)
if clen == 0 then
eq(0, string.byte(str, pos + 1)) -- only NUL bytes can has length zery
clen = 1 -- but skip it, otherwise we get stuck
end
if clen > 1 then
table.insert(mb_glyphs, string.sub(str, pos + 1, pos + clen))
end
pos = pos + clen
table.insert(breaks, pos)
end
eq(breaks[#breaks], len) -- include EOT as break
-- we could also send in breaks, but this is more human readable
eq(mb_glyphs, expected_glyphs)
for i = 1, #breaks - 1 do
local start, next = breaks[i], breaks[i + 1]
for p = start, next - 1 do
eq(p - start, lib.utf_head_off(cstr, cstr + p))
end
end
eq(0, lib.utf_head_off(cstr, cstr + len)) -- NUL byte is safe
end
-- stylua doesn't like ZWJ chars..
-- stylua: ignore start
check('hej och hå 🧑🌾!', { 'å', '🧑🌾' })
-- emoji (various kinds of combinations, use g8 to see them)
check("🏳️⚧️🧑🌾❤️😂🏴☠️", {"🏳️⚧️", "🧑🌾", "❤️", "😂", "🏴☠️"})
check('🏳️⚧️xy🧑🌾\r❤️😂å🏴☠️', { '🏳️⚧️', '🧑🌾', '❤️', '😂', 'å', '🏴☠️', '' })
check('🏳️⚧️\000🧑🌾\000❤️\000😂\000å\000🏴☠️\000', { '🏳️⚧️', '🧑🌾', '❤️', '😂', 'å', '🏴☠️', '' })
check('\195🏳️⚧️\198🧑🌾\165❤️\168\195😂\255🏴☠️\129\165', { '🏳️⚧️', '🧑🌾', '❤️', '😂', '🏴☠️', '' })
check('🇦🅱️ 🇦🇽 🇦🇨🇦 🇲🇽🇹🇱',{'🇦', '🅱️', '🇦🇽', '🇦🇨', '🇦', '🇲🇽', '🇹🇱'})
check('🏴🏴', {'🏴', '🏴'})
check('å\165ü\195aëq\168β\000\169本\255', {'å', 'ü', 'ë', 'β', '本'})
lib.p_arshape = true -- default
check('سلام', { 'س', 'لا', 'م' })
lib.p_arshape = false
check('سلام', { 'س', 'ل', 'ا', 'م' })
check('L̓̉̑̒̌̚ơ̗̌̒̄̀ŕ̈̈̎̐̕è̇̅̄̄̐m̖̟̟̅̄̚', {'L̓̉̑̒̌̚', 'ơ̗̌̒̄̀', 'ŕ̈̈̎̐̕', 'è̇̅̄̄̐', 'm̖̟̟̅̄̚'})
-- stylua: ignore end
end)
describe('utf_fold', function()
itp('does not crash with surrogates #30527', function()
eq(0xddfb, lib.utf_fold(0xddfb)) -- low surrogate, invalid as a character
eq(0xd800, lib.utf_fold(0xd800)) -- high surrogate, invalid as a character
end)
itp("doesn't crash on invalid codepoints", function()
eq(9000000, lib.utf_fold(9000000))
eq(0, lib.utf_fold(0))
end)
end)
end)