11 MEM_VECTOR_MAKE(ast_value*, globals);
12 MEM_VECTOR_MAKE(ast_function*, functions);
14 ast_function *function;
15 MEM_VECTOR_MAKE(ast_value*, locals);
19 MEM_VEC_FUNCTIONS(parser_t, ast_value*, globals)
20 MEM_VEC_FUNCTIONS(parser_t, ast_value*, locals)
21 MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
23 void parseerror(parser_t *parser, const char *fmt, ...)
28 printf("error %s:%lu: ", parser->lex->tok->ctx.file, (unsigned long)parser->lex->tok->ctx.line);
39 bool parser_next(parser_t *parser)
41 /* lex_do kills the previous token */
42 parser->tok = lex_do(parser->lex);
43 if (parser->tok == TOKEN_EOF || parser->tok >= TOKEN_ERROR)
48 /* lift a token out of the parser so it's not destroyed by parser_next */
49 token *parser_lift(parser_t *parser)
51 token *tok = parser->lex->tok;
52 parser->lex->tok = NULL;
56 #define parser_tokval(p) (p->lex->tok->value)
57 #define parser_token(p) (p->lex->tok)
58 #define parser_ctx(p) (p->lex->tok->ctx)
60 ast_value* parser_find_global(parser_t *parser, const char *name)
63 for (i = 0; i < parser->globals_count; ++i) {
64 if (!strcmp(parser->globals[i]->name, name))
65 return parser->globals[i];
70 ast_value* parser_find_local(parser_t *parser, const char *name, size_t upto)
73 for (i = parser->locals_count; i > upto;) {
75 if (!strcmp(parser->locals[i]->name, name))
76 return parser->locals[i];
81 ast_value* parser_find_var(parser_t *parser, const char *name)
84 v = parser_find_local(parser, name, 0);
85 if (!v) v = parser_find_global(parser, name);
90 MEM_VECTOR_MAKE(ast_value*, p);
92 MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
94 static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
98 lex_ctx ctx = parser_ctx(parser);
102 MEM_VECTOR_INIT(¶ms, p);
106 if (parser->tok == '(') {
112 if (!parser_next(parser)) {
113 MEM_VECTOR_CLEAR(¶ms, p);
117 if (parser->tok == ')')
120 temptype = parser_token(parser)->constval.t;
121 if (!parser_next(parser)) {
122 MEM_VECTOR_CLEAR(¶ms, p);
125 param = parser_parse_type(parser, temptype, &dummy);
129 MEM_VECTOR_CLEAR(¶ms, p);
133 if (!paramlist_t_p_add(¶ms, param)) {
134 MEM_VECTOR_CLEAR(¶ms, p);
135 parseerror(parser, "Out of memory while parsing typename");
139 if (parser->tok == ',')
141 if (parser->tok == ')')
143 MEM_VECTOR_CLEAR(¶ms, p);
144 parseerror(parser, "Unexpected token");
147 if (!parser_next(parser)) {
148 MEM_VECTOR_CLEAR(¶ms, p);
153 var = ast_value_new(ctx, "<unnamed>", vtype);
155 MEM_VECTOR_CLEAR(¶ms, p);
158 MEM_VECTOR_MOVE(¶ms, p, var, params);
162 static bool parser_expression(parser_t *parser, ast_block *block)
164 parseerror(parser, "TODO: statements/expressions");
168 static bool parser_variable(parser_t *parser, bool global);
169 static bool parser_body_do(parser_t *parser, ast_block *block)
171 if (parser->tok == TOKEN_TYPENAME)
174 if (!parser_variable(parser, false))
178 else if (parser->tok == '{')
183 return parser_expression(parser_t *parser, ast_block *block);
186 static ast_block* parser_parse_block(parser_t *parser)
188 size_t oldblocklocal;
189 ast_block *block = NULL;
191 oldblocklocal = parser->blocklocal;
192 parser->blocklocal = parser->locals_count;
194 if (!parser_next(parser)) { /* skip the '{' */
195 parseerror(parser, "expected function body");
199 block = ast_block_new(parser_ctx(parser));
201 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
203 if (parser->tok == '}')
206 if (!parser_body_do(parser, block)) {
207 ast_block_delete(block);
213 if (parser->tok != '}') {
214 ast_block_delete(block);
217 (void)parser_next(parser);
221 parser->blocklocal = oldblocklocal;
225 static bool parser_variable(parser_t *parser, bool global)
228 ast_function *func = NULL;
232 int basetype = parser_token(parser)->constval.t;
236 if (!parser_next(parser)) { /* skip basetype or comma */
237 parseerror(parser, "expected variable declaration");
243 ctx = parser_ctx(parser);
244 var = parser_parse_type(parser, basetype, &isfunc);
249 if (parser->tok != TOKEN_IDENT) {
250 parseerror(parser, "expected variable name\n");
254 if (global && parser_find_global(parser, parser_tokval(parser))) {
255 ast_value_delete(var);
256 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
260 if (!global && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
261 ast_value_delete(var);
262 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
266 if (!ast_value_set_name(var, parser_tokval(parser))) {
267 parseerror(parser, "failed to set variable name\n");
268 ast_value_delete(var);
273 /* a function was defined */
276 /* turn var into a value of TYPE_FUNCTION, with the old var
279 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
280 func = ast_function_new(ctx, var->name, fval);
281 if (!fval || !func) {
282 ast_value_delete(var);
283 if (fval) ast_value_delete(fval);
284 if (func) ast_function_delete(func);
288 fval->expression.next = (ast_expression*)var;
289 MEM_VECTOR_MOVE(var, params, fval, params);
291 if (!parser_t_functions_add(parser, func)) {
292 ast_value_delete(var);
293 if (fval) ast_value_delete(fval);
294 if (func) ast_function_delete(func);
301 if ( ( global && !parser_t_globals_add(parser, var)) ||
302 (!global && !parser_t_locals_add(parser, var)) )
304 ast_value_delete(var);
308 if (!parser_next(parser)) {
309 ast_value_delete(var);
313 if (parser->tok == ';') {
314 if (!parser_next(parser))
315 return parser->tok == TOKEN_EOF;
319 if (parser->tok == ',') {
324 if (parser->tok != '=') {
325 parseerror(parser, "expected '=' or ';'");
329 if (!parser_next(parser))
332 if (parser->tok == '#') {
334 parseerror(parser, "cannot declare builtins within functions");
337 if (!isfunc || !func) {
338 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
341 if (!parser_next(parser)) {
342 parseerror(parser, "expected builtin number");
345 if (parser->tok != TOKEN_INTCONST) {
346 parseerror(parser, "builtin number must be an integer constant");
349 if (parser_token(parser)->constval.i <= 0) {
350 parseerror(parser, "builtin number must be positive integer greater than zero");
354 func->builtin = -parser_token(parser)->constval.i;
355 } else if (parser->tok == '{') {
358 ast_function *old = parser->function;
361 parseerror(parser, "cannot declare functions within functions");
365 parser->function = func;
366 block = parser_parse_block(parser);
367 parser->function = old;
372 if (!ast_function_blocks_add(func, block)) {
373 ast_block_delete(block);
378 parseerror(parser, "TODO, const assignment");
381 if (!parser_next(parser))
384 if (parser->tok == ',') {
389 if (parser->tok != ';') {
390 parseerror(parser, "expected semicolon");
394 (void)parser_next(parser);
400 static bool parser_do(parser_t *parser)
402 if (parser->tok == TOKEN_TYPENAME)
404 return parser_variable(parser, true);
406 else if (parser->tok == TOKEN_KEYWORD)
408 /* handle 'var' and 'const' */
411 else if (parser->tok == '.')
413 /* entity-member declaration */
418 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
424 bool parser_compile(const char *filename)
430 parser = (parser_t*)mem_a(sizeof(parser_t));
434 memset(parser, 0, sizeof(parser));
436 MEM_VECTOR_INIT(parser, globals);
437 MEM_VECTOR_INIT(parser, locals);
438 parser->lex = lex_open(filename);
441 printf("failed to open file \"%s\"\n", filename);
445 /* initial lexer/parser state */
446 parser->lex->flags.noops = true;
448 if (parser_next(parser))
450 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
452 if (!parser_do(parser)) {
453 if (parser->tok == TOKEN_EOF)
454 parseerror(parser, "unexpected eof");
456 parseerror(parser, "parse error\n");
457 lex_close(parser->lex);
464 lex_close(parser->lex);
466 ir = ir_builder_new("gmqcc_out");
468 printf("failed to allocate builder\n");
472 for (i = 0; i < parser->globals_count; ++i) {
473 if (!ast_global_codegen(parser->globals[i], ir)) {
474 printf("failed to generate global %s\n", parser->globals[i]->name);
477 for (i = 0; i < parser->functions_count; ++i) {
478 if (!ast_function_codegen(parser->functions[i], ir)) {
479 printf("failed to generate function %s\n", parser->functions[i]->name);
481 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
482 printf("failed to finalize function %s\n", parser->functions[i]->name);
486 ir_builder_dump(ir, printf);
489 for (i = 0; i < parser->globals_count; ++i) {
490 ast_value_delete(parser->globals[i]);
492 MEM_VECTOR_CLEAR(parser, globals);