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local grammar = require('generators.c_grammar').grammar
--- @param fname string
--- @return string?
local function read_file(fname)
local f = io.open(fname, 'r')
if not f then
return
end
local contents = f:read('*a')
f:close()
return contents
end
--- @param fname string
--- @param contents string[]
local function write_file(fname, contents)
local contents_s = table.concat(contents, '\n') .. '\n'
local fcontents = read_file(fname)
if fcontents == contents_s then
return
end
local f = assert(io.open(fname, 'w'))
f:write(contents_s)
f:close()
end
--- @param fname string
--- @param non_static_fname string
--- @return string? non_static
local function add_iwyu_non_static(fname, non_static_fname)
if fname:find('.*/src/nvim/.*%.c$') then
-- Add an IWYU pragma comment if the corresponding .h file exists.
local header_fname = fname:sub(1, -3) .. '.h'
local header_f = io.open(header_fname, 'r')
if header_f then
header_f:close()
return (header_fname:gsub('.*/src/nvim/', 'nvim/'))
end
elseif non_static_fname:find('/include/api/private/dispatch_wrappers%.h%.generated%.h$') then
return 'nvim/api/private/dispatch.h'
elseif non_static_fname:find('/include/ui_events_call%.h%.generated%.h$') then
return 'nvim/ui.h'
elseif non_static_fname:find('/include/ui_events_client%.h%.generated%.h$') then
return 'nvim/ui_client.h'
elseif non_static_fname:find('/include/ui_events_remote%.h%.generated%.h$') then
return 'nvim/api/ui.h'
end
end
--- @param d string
local function process_decl(d)
-- Comments are really handled by preprocessor, so the following is not
-- needed
d = d:gsub('/%*.-%*/', '')
d = d:gsub('//.-\n', '\n')
d = d:gsub('# .-\n', '')
d = d:gsub('\n', ' ')
d = d:gsub('%s+', ' ')
d = d:gsub(' ?%( ?', '(')
d = d:gsub(' ?, ?', ', ')
d = d:gsub(' ?(%*+) ?', ' %1')
d = d:gsub(' ?(FUNC_ATTR_)', ' %1')
d = d:gsub(' $', '')
d = d:gsub('^ ', '')
return d .. ';'
end
--- @param fname string
--- @param text string
--- @return string[] static
--- @return string[] non_static
--- @return boolean any_static
local function gen_declarations(fname, text)
local non_static = {} --- @type string[]
local static = {} --- @type string[]
local neededfile = fname:match('[^/]+$')
local curfile = nil
local any_static = false
for _, node in ipairs(grammar:match(text)) do
if node[1] == 'preproc' then
curfile = node.content:match('^%a* %d+ "[^"]-/?([^"/]+)"') or curfile
elseif node[1] == 'proto' and curfile == neededfile then
local node_text = text:sub(node.pos, node.endpos - 1)
local declaration = process_decl(node_text)
if node.static then
if not any_static and declaration:find('FUNC_ATTR_') then
any_static = true
end
static[#static + 1] = declaration
else
non_static[#non_static + 1] = 'DLLEXPORT ' .. declaration
end
end
end
return static, non_static, any_static
end
local usage = [[
Usage:
gen_declarations.lua definitions.c static.h non-static.h definitions.i
Generates declarations for a C file definitions.c, putting declarations for
static functions into static.h and declarations for non-static functions into
non-static.h. File `definitions.i' should contain an already preprocessed
version of definitions.c and it is the only one which is actually parsed,
definitions.c is needed only to determine functions from which file out of all
functions found in definitions.i are needed and to generate an IWYU comment.
]]
local function main()
local fname = arg[1]
local static_fname = arg[2]
local non_static_fname = arg[3]
local preproc_fname = arg[4]
local static_basename = arg[5]
if fname == '--help' or #arg < 5 then
print(usage)
os.exit()
end
local text = assert(read_file(preproc_fname))
local static_decls, non_static_decls, any_static = gen_declarations(fname, text)
local static = {} --- @type string[]
if fname:find('.*/src/nvim/.*%.h$') then
static[#static + 1] = ('// IWYU pragma: private, include "%s"'):format(
fname:gsub('.*/src/nvim/', 'nvim/')
)
end
vim.list_extend(static, {
'#define DEFINE_FUNC_ATTRIBUTES',
'#include "nvim/func_attr.h"',
'#undef DEFINE_FUNC_ATTRIBUTES',
})
vim.list_extend(static, static_decls)
vim.list_extend(static, {
'#define DEFINE_EMPTY_ATTRIBUTES',
'#include "nvim/func_attr.h" // IWYU pragma: export',
'',
})
write_file(static_fname, static)
if any_static then
local orig_text = assert(read_file(fname))
local pat = '\n#%s?include%s+"' .. static_basename .. '"\n'
local pat_comment = '\n#%s?include%s+"' .. static_basename .. '"%s*//'
if not orig_text:find(pat) and not orig_text:find(pat_comment) then
error(('fail: missing include for %s in %s'):format(static_basename, fname))
end
end
if non_static_fname ~= 'SKIP' then
local non_static = {} --- @type string[]
local iwyu_non_static = add_iwyu_non_static(fname, non_static_fname)
if iwyu_non_static then
non_static[#non_static + 1] = ('// IWYU pragma: private, include "%s"'):format(
iwyu_non_static
)
end
vim.list_extend(non_static, {
'#define DEFINE_FUNC_ATTRIBUTES',
'#include "nvim/func_attr.h"',
'#undef DEFINE_FUNC_ATTRIBUTES',
'#ifndef DLLEXPORT',
'# ifdef MSWIN',
'# define DLLEXPORT __declspec(dllexport)',
'# else',
'# define DLLEXPORT',
'# endif',
'#endif',
})
vim.list_extend(non_static, non_static_decls)
non_static[#non_static + 1] = '#include "nvim/func_attr.h"'
write_file(non_static_fname, non_static)
end
end
return main()
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