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local ffi = require('ffi')
local lpeg = require('lpeg')
local formatc = require('test.unit.formatc')
local Set = require('test.unit.set')
local Preprocess = require('test.unit.preprocess')
local Paths = require('test.config.paths')
-- add some standard header locations
for i, 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)
function trim(s)
return s:match('^%s*(.*%S)') or ''
end
-- a Set that keeps around the lines we've already seen
if cdefs == nil then
cdefs = Set:new()
end
if imported == nil then
imported = Set:new()
end
-- some things are just too complex for the LuaJIT C parser to digest. We
-- usually don't need them anyway.
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)) 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.
-- cimport = (path) ->
function cimport(...)
local paths = {}
local args = {...}
-- filter out paths we've already imported
for i = 1, #args do
local path = args[i]
if not imported:contains(path) then
paths[#paths + 1] = path
end
end
for i = 1, #paths do
imported:add(paths[i])
end
if #paths == 0 then
return libnvim
end
-- preprocess the header
local stream = Preprocess.preprocess_stream(unpack(paths))
local body = stream:read("*a")
stream:close()
-- 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
new_cdefs:add(trim(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()
ffi.cdef(table.concat(new_lines, "\n"))
return libnvim
end
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
function internalize(cdata, len)
ffi.gc(cdata, ffi.C.free)
return ffi.string(cdata, len)
end
local cstr = ffi.typeof('char[?]')
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.
function vim_init()
if vim_init_called ~= nil then
return
end
-- import os_unix.h for mch_early_init(), which initializes some globals
local os = cimport('./src/nvim/os_unix.h')
os.mch_early_init()
vim_init_called = true
end
-- C constants.
local NULL = ffi.cast('void*', 0)
local OK = 1
local FAIL = 0
return {
cimport = cimport,
cppimport = cppimport,
internalize = internalize,
eq = function(expected, actual)
return assert.are.same(expected, actual)
end,
neq = function(expected, actual)
return assert.are_not.same(expected, actual)
end,
ffi = ffi,
lib = libnvim,
cstr = cstr,
to_cstr = to_cstr,
vim_init = vim_init,
NULL = NULL,
OK = OK,
FAIL = FAIL
}
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