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local ffi = require('ffi')
local formatc = require('test.unit.formatc')
local Set = require('test.unit.set')
local Preprocess = require('test.unit.preprocess')
local Paths = require('test.config.paths')
local global_helpers = require('test.helpers')
local neq = global_helpers.neq
local eq = global_helpers.eq
local ok = global_helpers.ok
-- add some standard header locations
for _, p in ipairs(Paths.include_paths) do
Preprocess.add_to_include_path(p)
end
-- load neovim shared library
local libnvim = ffi.load(Paths.test_libnvim_path)
local function trim(s)
return s:match('^%s*(.*%S)') or ''
end
-- a Set that keeps around the lines we've already seen
local cdefs = Set:new()
local imported = Set:new()
local pragma_pack_id = 1
-- some things are just too complex for the LuaJIT C parser to digest. We
-- usually don't need them anyway.
local function filter_complex_blocks(body)
local result = {}
for line in body:gmatch("[^\r\n]+") do
if not (string.find(line, "(^)", 1, true) ~= nil
or string.find(line, "_ISwupper", 1, true)
or string.find(line, "msgpack_zone_push_finalizer")
or string.find(line, "msgpack_unpacker_reserve_buffer")
or string.find(line, "inline _Bool")) then
result[#result + 1] = line
end
end
return table.concat(result, "\n")
end
-- use this helper to import C files, you can pass multiple paths at once,
-- this helper will return the C namespace of the nvim library.
local function cimport(...)
local paths = {}
local args = {...}
-- filter out paths we've already imported
for _,path in pairs(args) do
if path ~= nil and not imported:contains(path) then
paths[#paths + 1] = path
end
end
for _,path in pairs(paths) do
imported:add(path)
end
if #paths == 0 then
return libnvim
end
local body = nil
for _ = 1, 10 do
local stream = Preprocess.preprocess_stream(unpack(paths))
body = stream:read("*a")
stream:close()
if body ~= nil then break end
end
if body == nil then
print("ERROR: helpers.lua: Preprocess.preprocess_stream():read() returned empty")
end
-- format it (so that the lines are "unique" statements), also filter out
-- Objective-C blocks
body = formatc(body)
body = filter_complex_blocks(body)
-- add the formatted lines to a set
local new_cdefs = Set:new()
for line in body:gmatch("[^\r\n]+") do
line = trim(line)
-- give each #pragma pack an unique id, so that they don't get removed
-- if they are inserted into the set
-- (they are needed in the right order with the struct definitions,
-- otherwise luajit has wrong memory layouts for the sturcts)
if line:match("#pragma%s+pack") then
line = line .. " // " .. pragma_pack_id
pragma_pack_id = pragma_pack_id + 1
end
new_cdefs:add(line)
end
-- subtract the lines we've already imported from the new lines, then add
-- the new unique lines to the old lines (so they won't be imported again)
new_cdefs:diff(cdefs)
cdefs:union(new_cdefs)
if new_cdefs:size() == 0 then
-- if there's no new lines, just return
return libnvim
end
-- request a sorted version of the new lines (same relative order as the
-- original preprocessed file) and feed that to the LuaJIT ffi
local new_lines = new_cdefs:to_table()
if os.getenv('NVIM_TEST_PRINT_CDEF') == '1' then
for lnum, line in ipairs(new_lines) do
print(lnum, line)
end
end
ffi.cdef(table.concat(new_lines, "\n"))
return libnvim
end
local function cppimport(path)
return cimport(Paths.test_include_path .. '/' .. path)
end
cimport('./src/nvim/types.h')
-- take a pointer to a C-allocated string and return an interned
-- version while also freeing the memory
local function internalize(cdata, len)
ffi.gc(cdata, ffi.C.free)
return ffi.string(cdata, len)
end
local cstr = ffi.typeof('char[?]')
local function to_cstr(string)
return cstr((string.len(string)) + 1, string)
end
-- initialize some global variables, this is still necessary to unit test
-- functions that rely on global state.
do
local main = cimport('./src/nvim/main.h')
local time = cimport('./src/nvim/os/time.h')
time.time_init()
main.early_init()
main.event_init()
end
-- C constants.
local NULL = ffi.cast('void*', 0)
local OK = 1
local FAIL = 0
return {
cimport = cimport,
cppimport = cppimport,
internalize = internalize,
ok = ok,
eq = eq,
neq = neq,
ffi = ffi,
lib = libnvim,
cstr = cstr,
to_cstr = to_cstr,
NULL = NULL,
OK = OK,
FAIL = FAIL
}
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