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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,183 @@ | ||
| lpeg = require('lpeg') | ||
| mpack = require('mpack') | ||
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| -- TODO: reduce copying | ||
| -- lpeg grammar for building api metadata from a set of header files. It | ||
| -- ignores comments and preprocessor commands and parses a very small subset | ||
| -- of C prototypes with a limited set of types | ||
| P, R, S = lpeg.P, lpeg.R, lpeg.S | ||
| C, Ct, Cc, Cg = lpeg.C, lpeg.Ct, lpeg.Cc, lpeg.Cg | ||
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| any = P(1) -- (consume one character) | ||
| letter = R('az', 'AZ') + S('_$') | ||
| num = R('09') | ||
| alpha = letter + num | ||
| nl = P('\r\n') + P('\n') | ||
| not_nl = any - nl | ||
| ws = S(' \t') + nl | ||
| fill = ws ^ 0 | ||
| c_comment = P('//') * (not_nl ^ 0) | ||
| c_preproc = P('#') * (not_nl ^ 0) | ||
| typed_container = | ||
| (P('ArrayOf(') + P('DictionaryOf(')) * ((any - P(')')) ^ 1) * P(')') | ||
| c_id = ( | ||
| typed_container + | ||
| (letter * (alpha ^ 0)) | ||
| ) | ||
| c_void = P('void') | ||
| c_param_type = ( | ||
| ((P('Error') * fill * P('*') * fill) * Cc('error')) + | ||
| (C(c_id) * (ws ^ 1)) | ||
| ) | ||
| c_type = (C(c_void) * (ws ^ 1)) + c_param_type | ||
| c_param = Ct(c_param_type * C(c_id)) | ||
| c_param_list = c_param * (fill * (P(',') * fill * c_param) ^ 0) | ||
| c_params = Ct(c_void + c_param_list) | ||
| c_proto = Ct( | ||
| Cg(c_type, 'return_type') * Cg(c_id, 'name') * | ||
| fill * P('(') * fill * Cg(c_params, 'parameters') * fill * P(')') * | ||
| Cg(Cc(false), 'async') * | ||
| (fill * Cg((P('FUNC_API_SINCE(') * C(num ^ 1)) * P(')'), 'since') ^ -1) * | ||
| (fill * Cg((P('REMOTE_ONLY') * Cc(true)), 'remote_only') ^ -1) * | ||
| (fill * Cg((P('REMOTE_IMPL') * Cc(true)), 'remote_impl') ^ -1) * | ||
| (fill * Cg((P('BRIDGE_IMPL') * Cc(true)), 'bridge_impl') ^ -1) * | ||
| fill * P(';') | ||
| ) | ||
| grammar = Ct((c_proto + c_comment + c_preproc + ws) ^ 1) | ||
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||
| -- we need at least 4 arguments since the last two are output files | ||
| assert(#arg == 6) | ||
| input = io.open(arg[2], 'rb') | ||
| proto_output = io.open(arg[3], 'wb') | ||
| call_output = io.open(arg[4], 'wb') | ||
| remote_output = io.open(arg[5], 'wb') | ||
| bridge_output = io.open(arg[6], 'wb') | ||
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| functions = {} | ||
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| local events = grammar:match(input:read('*all')) | ||
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| function write_signature(output, ev, prefix, notype) | ||
| output:write('('..prefix) | ||
| if prefix == "" and #ev.parameters == 0 then | ||
| output:write('void') | ||
| end | ||
| for j = 1, #ev.parameters do | ||
| if j > 1 or prefix ~= '' then | ||
| output:write(', ') | ||
| end | ||
| local param = ev.parameters[j] | ||
| if not notype then | ||
| output:write(param[1]..' ') | ||
| end | ||
| output:write(param[2]) | ||
| end | ||
| output:write(')') | ||
| end | ||
|
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||
| function write_arglist(output, ev, need_copy) | ||
| output:write(' Array args = ARRAY_DICT_INIT;\n') | ||
| for j = 1, #ev.parameters do | ||
| local param = ev.parameters[j] | ||
| local kind = string.upper(param[1]) | ||
| local do_copy = need_copy and (kind == "ARRAY" or kind == "DICTIONARY" or kind == "STRING") | ||
| output:write(' ADD(args, ') | ||
| if do_copy then | ||
| output:write('copy_object(') | ||
| end | ||
| output:write(kind..'_OBJ('..param[2]..')') | ||
| if do_copy then | ||
| output:write(')') | ||
| end | ||
| output:write(');\n') | ||
| end | ||
| end | ||
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| for i = 1, #events do | ||
| ev = events[i] | ||
| assert(ev.return_type == 'void') | ||
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| if not ev.remote_only then | ||
| proto_output:write(' void (*'..ev.name..')') | ||
| write_signature(proto_output, ev, 'UI *ui') | ||
| proto_output:write(';\n') | ||
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| if not ev.remote_impl then | ||
| remote_output:write('static void remote_ui_'..ev.name) | ||
| write_signature(remote_output, ev, 'UI *ui') | ||
| remote_output:write('\n{\n') | ||
| write_arglist(remote_output, ev, true) | ||
| remote_output:write(' push_call(ui, "'..ev.name..'", args);\n') | ||
| remote_output:write('}\n\n') | ||
| end | ||
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| if not ev.bridge_impl then | ||
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| send, argv, recv, recv_argv, recv_cleanup = '', '', '', '', '' | ||
| argc = 1 | ||
| for j = 1, #ev.parameters do | ||
| local param = ev.parameters[j] | ||
| copy = 'copy_'..param[2] | ||
| if param[1] == 'String' then | ||
| send = send..' String copy_'..param[2]..' = copy_string('..param[2]..');\n' | ||
| argv = argv..', '..copy..'.data, INT2PTR('..copy..'.size)' | ||
| recv = (recv..' String '..param[2].. | ||
| ' = (String){.data = argv['..argc..'],'.. | ||
| '.size = (size_t)argv['..(argc+1)..']};\n') | ||
| recv_argv = recv_argv..', '..param[2] | ||
| recv_cleanup = recv_cleanup..' api_free_string('..param[2]..');\n' | ||
| argc = argc+2 | ||
| elseif param[1] == 'Array' then | ||
| send = send..' Array copy_'..param[2]..' = copy_array('..param[2]..');\n' | ||
| argv = argv..', '..copy..'.items, INT2PTR('..copy..'.size)' | ||
| recv = (recv..' Array '..param[2].. | ||
| ' = (Array){.items = argv['..argc..'],'.. | ||
| '.size = (size_t)argv['..(argc+1)..']};\n') | ||
| recv_argv = recv_argv..', '..param[2] | ||
| recv_cleanup = recv_cleanup..' api_free_array('..param[2]..');\n' | ||
| argc = argc+2 | ||
| elseif param[1] == 'Integer' or param[1] == 'Boolean' then | ||
| argv = argv..', INT2PTR('..param[2]..')' | ||
| recv_argv = recv_argv..', PTR2INT(argv['..argc..'])' | ||
| argc = argc+1 | ||
| else | ||
| assert(false) | ||
| end | ||
| end | ||
| bridge_output:write('static void ui_bridge_'..ev.name.. | ||
| '_event(void **argv)\n{\n') | ||
| bridge_output:write(' UI *ui = UI(argv[0]);\n') | ||
| bridge_output:write(recv) | ||
| bridge_output:write(' ui->'..ev.name..'(ui'..recv_argv..');\n') | ||
| bridge_output:write(recv_cleanup) | ||
| bridge_output:write('}\n\n') | ||
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| bridge_output:write('static void ui_bridge_'..ev.name) | ||
| write_signature(bridge_output, ev, 'UI *ui') | ||
| bridge_output:write('\n{\n') | ||
| bridge_output:write(send) | ||
| bridge_output:write(' UI_CALL(ui, '..ev.name..', '..argc..', ui'..argv..');\n}\n') | ||
| end | ||
| end | ||
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| call_output:write('void ui_call_'..ev.name) | ||
| write_signature(call_output, ev, '') | ||
| call_output:write('\n{\n') | ||
| if ev.remote_only then | ||
| write_arglist(call_output, ev, false) | ||
| call_output:write(' ui_event("'..ev.name..'", args);\n') | ||
| else | ||
| call_output:write(' UI_CALL') | ||
| write_signature(call_output, ev, ev.name, true) | ||
| call_output:write(";\n") | ||
| end | ||
| call_output:write("}\n\n") | ||
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| end | ||
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| proto_output:close() | ||
| call_output:close() | ||
| remote_output:close() |
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