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, bool *isfunc)
98 lex_ctx ctx = parser_ctx(parser);
99 int vtype = parser_token(parser)->constval.t;
101 MEM_VECTOR_INIT(¶ms, p);
105 if (!parser_next(parser))
108 if (parser->tok == '(') {
114 if (!parser_next(parser)) {
115 MEM_VECTOR_CLEAR(¶ms, p);
119 if (parser->tok == ')')
122 param = parser_parse_type(parser, &dummy);
126 MEM_VECTOR_CLEAR(¶ms, p);
130 if (!paramlist_t_p_add(¶ms, param)) {
131 MEM_VECTOR_CLEAR(¶ms, p);
132 parseerror(parser, "Out of memory while parsing typename");
136 if (parser->tok == ',')
138 if (parser->tok == ')')
140 MEM_VECTOR_CLEAR(¶ms, p);
141 parseerror(parser, "Unexpected token");
144 if (!parser_next(parser)) {
145 MEM_VECTOR_CLEAR(¶ms, p);
150 var = ast_value_new(ctx, "<unnamed>", vtype);
152 MEM_VECTOR_CLEAR(¶ms, p);
155 MEM_VECTOR_MOVE(¶ms, p, var, params);
159 static bool parser_variable(parser_t *parser, bool global);
160 static bool parser_body_do(parser_t *parser, ast_block *block)
162 if (parser->tok == TOKEN_TYPENAME)
165 if (!parser_variable(parser, false))
169 else if (parser->tok == '{')
174 parseerror(parser, "expected statement");
178 static ast_block* parser_parse_block(parser_t *parser)
180 size_t oldblocklocal;
181 ast_block *block = NULL;
183 oldblocklocal = parser->blocklocal;
184 parser->blocklocal = parser->locals_count;
186 if (!parser_next(parser)) { /* skip the '{' */
187 parseerror(parser, "expected function body");
191 block = ast_block_new(parser_ctx(parser));
193 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
195 if (parser->tok == '}')
198 if (!parser_body_do(parser, block)) {
199 ast_block_delete(block);
205 if (parser->tok != '}') {
206 ast_block_delete(block);
209 (void)parser_next(parser);
213 parser->blocklocal = oldblocklocal;
217 static bool parser_variable(parser_t *parser, bool global)
220 ast_function *func = NULL;
221 lex_ctx ctx = parser_ctx(parser);
222 ast_value *var = parser_parse_type(parser, &isfunc);
226 if (parser->tok != TOKEN_IDENT) {
227 parseerror(parser, "expected variable name\n");
231 if (global && parser_find_global(parser, parser_tokval(parser))) {
232 ast_value_delete(var);
233 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
237 if (!global && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
238 ast_value_delete(var);
239 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
243 if (!ast_value_set_name(var, parser_tokval(parser))) {
244 parseerror(parser, "failed to set variable name\n");
245 ast_value_delete(var);
250 /* a function was defined */
253 /* turn var into a value of TYPE_FUNCTION, with the old var
256 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
257 func = ast_function_new(ctx, var->name, fval);
258 if (!fval || !func) {
259 ast_value_delete(var);
260 if (fval) ast_value_delete(fval);
261 if (func) ast_function_delete(func);
265 fval->expression.next = (ast_expression*)var;
266 MEM_VECTOR_MOVE(var, params, fval, params);
268 if (!parser_t_functions_add(parser, func)) {
269 ast_value_delete(var);
270 if (fval) ast_value_delete(fval);
271 if (func) ast_function_delete(func);
278 if ( ( global && !parser_t_globals_add(parser, var)) ||
279 (!global && !parser_t_locals_add(parser, var)) )
281 ast_value_delete(var);
285 if (!parser_next(parser)) {
286 ast_value_delete(var);
290 if (parser->tok == ';') {
291 if (!parser_next(parser))
292 return parser->tok == TOKEN_EOF;
296 if (parser->tok != '=') {
297 parseerror(parser, "expected '=' or ';'");
301 if (!parser_next(parser))
304 if (parser->tok == '#') {
306 parseerror(parser, "cannot declare builtins within functions");
309 if (!isfunc || !func) {
310 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
313 if (!parser_next(parser)) {
314 parseerror(parser, "expected builtin number");
317 if (parser->tok != TOKEN_INTCONST) {
318 parseerror(parser, "builtin number must be an integer constant");
321 if (parser_token(parser)->constval.i <= 0) {
322 parseerror(parser, "builtin number must be positive integer greater than zero");
326 func->builtin = -parser_token(parser)->constval.i;
327 } else if (parser->tok == '{') {
330 ast_function *old = parser->function;
333 parseerror(parser, "cannot declare functions within functions");
337 parser->function = func;
338 block = parser_parse_block(parser);
339 parser->function = old;
344 if (!ast_function_blocks_add(func, block)) {
345 ast_block_delete(block);
350 parseerror(parser, "TODO, const assignment");
353 if (!parser_next(parser))
356 if (parser->tok != ';') {
357 parseerror(parser, "expected semicolon");
361 (void)parser_next(parser);
366 static bool parser_do(parser_t *parser)
368 if (parser->tok == TOKEN_TYPENAME)
370 return parser_variable(parser, true);
372 else if (parser->tok == TOKEN_KEYWORD)
374 /* handle 'var' and 'const' */
377 else if (parser->tok == '.')
379 /* entity-member declaration */
384 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
390 bool parser_compile(const char *filename)
396 parser = (parser_t*)mem_a(sizeof(parser_t));
400 memset(parser, 0, sizeof(parser));
402 MEM_VECTOR_INIT(parser, globals);
403 MEM_VECTOR_INIT(parser, locals);
404 parser->lex = lex_open(filename);
407 printf("failed to open file \"%s\"\n", filename);
411 /* initial lexer/parser state */
412 parser->lex->flags.noops = true;
414 if (parser_next(parser))
416 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
418 if (!parser_do(parser)) {
419 if (parser->tok == TOKEN_EOF)
420 parseerror(parser, "unexpected eof");
422 parseerror(parser, "parse error\n");
423 lex_close(parser->lex);
430 lex_close(parser->lex);
432 ir = ir_builder_new("gmqcc_out");
434 printf("failed to allocate builder\n");
438 for (i = 0; i < parser->globals_count; ++i) {
439 if (!ast_global_codegen(parser->globals[i], ir)) {
440 printf("failed to generate global %s\n", parser->globals[i]->name);
443 for (i = 0; i < parser->functions_count; ++i) {
444 if (!ast_function_codegen(parser->functions[i], ir)) {
445 printf("failed to generate function %s\n", parser->functions[i]->name);
447 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
448 printf("failed to finalize function %s\n", parser->functions[i]->name);
452 ir_builder_dump(ir, printf);
455 for (i = 0; i < parser->globals_count; ++i) {
456 ast_value_delete(parser->globals[i]);
458 MEM_VECTOR_CLEAR(parser, globals);