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_variable(parser_t *parser, bool global);
163 static bool parser_body_do(parser_t *parser, ast_block *block)
165 if (parser->tok == TOKEN_TYPENAME)
168 if (!parser_variable(parser, false))
172 else if (parser->tok == '{')
177 parseerror(parser, "expected statement");
181 static ast_block* parser_parse_block(parser_t *parser)
183 size_t oldblocklocal;
184 ast_block *block = NULL;
186 oldblocklocal = parser->blocklocal;
187 parser->blocklocal = parser->locals_count;
189 if (!parser_next(parser)) { /* skip the '{' */
190 parseerror(parser, "expected function body");
194 block = ast_block_new(parser_ctx(parser));
196 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
198 if (parser->tok == '}')
201 if (!parser_body_do(parser, block)) {
202 ast_block_delete(block);
208 if (parser->tok != '}') {
209 ast_block_delete(block);
212 (void)parser_next(parser);
216 parser->blocklocal = oldblocklocal;
220 static bool parser_variable(parser_t *parser, bool global)
223 ast_function *func = NULL;
227 int basetype = parser_token(parser)->constval.t;
231 if (!parser_next(parser)) { /* skip basetype or comma */
232 parseerror(parser, "expected variable declaration");
238 ctx = parser_ctx(parser);
239 var = parser_parse_type(parser, basetype, &isfunc);
244 if (parser->tok != TOKEN_IDENT) {
245 parseerror(parser, "expected variable name\n");
249 if (global && parser_find_global(parser, parser_tokval(parser))) {
250 ast_value_delete(var);
251 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
255 if (!global && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
256 ast_value_delete(var);
257 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
261 if (!ast_value_set_name(var, parser_tokval(parser))) {
262 parseerror(parser, "failed to set variable name\n");
263 ast_value_delete(var);
268 /* a function was defined */
271 /* turn var into a value of TYPE_FUNCTION, with the old var
274 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
275 func = ast_function_new(ctx, var->name, fval);
276 if (!fval || !func) {
277 ast_value_delete(var);
278 if (fval) ast_value_delete(fval);
279 if (func) ast_function_delete(func);
283 fval->expression.next = (ast_expression*)var;
284 MEM_VECTOR_MOVE(var, params, fval, params);
286 if (!parser_t_functions_add(parser, func)) {
287 ast_value_delete(var);
288 if (fval) ast_value_delete(fval);
289 if (func) ast_function_delete(func);
296 if ( ( global && !parser_t_globals_add(parser, var)) ||
297 (!global && !parser_t_locals_add(parser, var)) )
299 ast_value_delete(var);
303 if (!parser_next(parser)) {
304 ast_value_delete(var);
308 if (parser->tok == ';') {
309 if (!parser_next(parser))
310 return parser->tok == TOKEN_EOF;
314 if (parser->tok == ',') {
319 if (parser->tok != '=') {
320 parseerror(parser, "expected '=' or ';'");
324 if (!parser_next(parser))
327 if (parser->tok == '#') {
329 parseerror(parser, "cannot declare builtins within functions");
332 if (!isfunc || !func) {
333 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
336 if (!parser_next(parser)) {
337 parseerror(parser, "expected builtin number");
340 if (parser->tok != TOKEN_INTCONST) {
341 parseerror(parser, "builtin number must be an integer constant");
344 if (parser_token(parser)->constval.i <= 0) {
345 parseerror(parser, "builtin number must be positive integer greater than zero");
349 func->builtin = -parser_token(parser)->constval.i;
350 } else if (parser->tok == '{') {
353 ast_function *old = parser->function;
356 parseerror(parser, "cannot declare functions within functions");
360 parser->function = func;
361 block = parser_parse_block(parser);
362 parser->function = old;
367 if (!ast_function_blocks_add(func, block)) {
368 ast_block_delete(block);
373 parseerror(parser, "TODO, const assignment");
376 if (!parser_next(parser))
379 if (parser->tok == ',') {
384 if (parser->tok != ';') {
385 parseerror(parser, "expected semicolon");
389 (void)parser_next(parser);
395 static bool parser_do(parser_t *parser)
397 if (parser->tok == TOKEN_TYPENAME)
399 return parser_variable(parser, true);
401 else if (parser->tok == TOKEN_KEYWORD)
403 /* handle 'var' and 'const' */
406 else if (parser->tok == '.')
408 /* entity-member declaration */
413 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
419 bool parser_compile(const char *filename)
425 parser = (parser_t*)mem_a(sizeof(parser_t));
429 memset(parser, 0, sizeof(parser));
431 MEM_VECTOR_INIT(parser, globals);
432 MEM_VECTOR_INIT(parser, locals);
433 parser->lex = lex_open(filename);
436 printf("failed to open file \"%s\"\n", filename);
440 /* initial lexer/parser state */
441 parser->lex->flags.noops = true;
443 if (parser_next(parser))
445 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
447 if (!parser_do(parser)) {
448 if (parser->tok == TOKEN_EOF)
449 parseerror(parser, "unexpected eof");
451 parseerror(parser, "parse error\n");
452 lex_close(parser->lex);
459 lex_close(parser->lex);
461 ir = ir_builder_new("gmqcc_out");
463 printf("failed to allocate builder\n");
467 for (i = 0; i < parser->globals_count; ++i) {
468 if (!ast_global_codegen(parser->globals[i], ir)) {
469 printf("failed to generate global %s\n", parser->globals[i]->name);
472 for (i = 0; i < parser->functions_count; ++i) {
473 if (!ast_function_codegen(parser->functions[i], ir)) {
474 printf("failed to generate function %s\n", parser->functions[i]->name);
476 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
477 printf("failed to finalize function %s\n", parser->functions[i]->name);
481 ir_builder_dump(ir, printf);
484 for (i = 0; i < parser->globals_count; ++i) {
485 ast_value_delete(parser->globals[i]);
487 MEM_VECTOR_CLEAR(parser, globals);