11 MEM_VECTOR_MAKE(ast_value*, globals);
12 MEM_VECTOR_MAKE(ast_function*, functions);
13 MEM_VECTOR_MAKE(ast_value*, imm_float);
15 ast_function *function;
16 MEM_VECTOR_MAKE(ast_value*, locals);
20 MEM_VEC_FUNCTIONS(parser_t, ast_value*, globals)
21 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_float)
22 MEM_VEC_FUNCTIONS(parser_t, ast_value*, locals)
23 MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
25 void parseerror(parser_t *parser, const char *fmt, ...)
30 printf("error %s:%lu: ", parser->lex->tok->ctx.file, (unsigned long)parser->lex->tok->ctx.line);
41 bool parser_next(parser_t *parser)
43 /* lex_do kills the previous token */
44 parser->tok = lex_do(parser->lex);
45 if (parser->tok == TOKEN_EOF || parser->tok >= TOKEN_ERROR)
50 /* lift a token out of the parser so it's not destroyed by parser_next */
51 token *parser_lift(parser_t *parser)
53 token *tok = parser->lex->tok;
54 parser->lex->tok = NULL;
58 #define parser_tokval(p) (p->lex->tok->value)
59 #define parser_token(p) (p->lex->tok)
60 #define parser_ctx(p) (p->lex->tok->ctx)
62 ast_value* parser_const_float(parser_t *parser, double d)
66 for (i = 0; i < parser->imm_float_count; ++i) {
67 if (parser->imm_float[i]->constval.vfloat == d)
68 return parser->imm_float[i];
70 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
72 out->constval.vfloat = d;
73 if (!parser_t_imm_float_add(parser, out)) {
74 ast_value_delete(out);
80 ast_value* parser_find_global(parser_t *parser, const char *name)
83 for (i = 0; i < parser->globals_count; ++i) {
84 if (!strcmp(parser->globals[i]->name, name))
85 return parser->globals[i];
90 ast_value* parser_find_local(parser_t *parser, const char *name, size_t upto)
94 for (i = parser->locals_count; i > upto;) {
96 if (!strcmp(parser->locals[i]->name, name))
97 return parser->locals[i];
99 fun = parser->function->vtype;
100 for (i = 0; i < fun->params_count; ++i) {
101 if (!strcmp(fun->params[i]->name, name))
102 return fun->params[i];
107 ast_value* parser_find_var(parser_t *parser, const char *name)
110 v = parser_find_local(parser, name, 0);
111 if (!v) v = parser_find_global(parser, name);
116 MEM_VECTOR_MAKE(ast_value*, p);
118 MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
120 static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
124 lex_ctx ctx = parser_ctx(parser);
125 int vtype = basetype;
129 MEM_VECTOR_INIT(¶ms, p);
133 if (parser->tok == '(') {
139 if (!parser_next(parser))
142 if (parser->tok == ')')
145 temptype = parser_token(parser)->constval.t;
146 if (!parser_next(parser))
149 param = parser_parse_type(parser, temptype, &dummy);
155 if (parser->tok == TOKEN_IDENT) {
156 /* named parameter */
157 if (!ast_value_set_name(param, parser_tokval(parser)))
159 if (!parser_next(parser))
163 if (!paramlist_t_p_add(¶ms, param)) {
164 parseerror(parser, "Out of memory while parsing typename");
168 if (parser->tok == ',')
170 if (parser->tok == ')')
172 parseerror(parser, "Unexpected token");
175 if (!parser_next(parser))
179 var = ast_value_new(ctx, "<unnamed>", vtype);
182 MEM_VECTOR_MOVE(¶ms, p, var, params);
185 for (i = 0; i < params.p_count; ++i)
186 ast_value_delete(params.p[i]);
187 MEM_VECTOR_CLEAR(¶ms, p);
193 size_t etype; /* 0 = expression, others are operators */
196 ast_value *value; /* need to know if we can assign */
201 MEM_VECTOR_MAKE(sy_elem, out);
202 MEM_VECTOR_MAKE(sy_elem, ops);
204 MEM_VEC_FUNCTIONS(shunt, sy_elem, out)
205 MEM_VEC_FUNCTIONS(shunt, sy_elem, ops)
207 static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
216 static sy_elem syval(lex_ctx ctx, ast_value *v) {
219 e.out = (ast_expression*)v;
226 static sy_elem syop(lex_ctx ctx, const oper_info *op) {
228 e.etype = 1 + (op - operators);
236 static sy_elem syparen(lex_ctx ctx, int p) {
246 static bool parser_sy_pop(parser_t *parser, shunt *sy)
250 ast_expression *out = NULL;
251 ast_expression *exprs[3];
255 if (!sy->ops_count) {
256 parseerror(parser, "internal error: missing operator");
260 if (sy->ops[sy->ops_count-1].paren) {
261 parseerror(parser, "unmatched parenthesis");
265 op = &operators[sy->ops[sy->ops_count-1].etype - 1];
266 ctx = sy->ops[sy->ops_count-1].ctx;
268 if (sy->out_count < op->operands) {
269 parseerror(parser, "internal error: not enough operands: %i", sy->out_count);
275 sy->out_count -= op->operands;
276 for (i = 0; i < op->operands; ++i) {
277 exprs[i] = sy->out[sy->out_count+i].out;
278 vars[i] = sy->out[sy->out_count+i].value;
284 parseerror(parser, "internal error: unhandled operand");
288 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
289 parseerror(parser, "Cannot add type %s and %s",
290 type_name[exprs[0]->expression.vtype],
291 type_name[exprs[1]->expression.vtype]);
294 switch (exprs[0]->expression.vtype) {
296 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
299 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
302 parseerror(parser, "Cannot add type %s and %s",
303 type_name[exprs[0]->expression.vtype],
304 type_name[exprs[1]->expression.vtype]);
309 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
310 parseerror(parser, "Cannot subtract type %s from %s",
311 type_name[exprs[1]->expression.vtype],
312 type_name[exprs[0]->expression.vtype]);
315 switch (exprs[0]->expression.vtype) {
317 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
320 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
323 parseerror(parser, "Cannot add type %s from %s",
324 type_name[exprs[1]->expression.vtype],
325 type_name[exprs[0]->expression.vtype]);
330 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
331 exprs[0]->expression.vtype != TYPE_VECTOR &&
332 exprs[0]->expression.vtype != TYPE_FLOAT &&
333 exprs[1]->expression.vtype != TYPE_VECTOR &&
334 exprs[1]->expression.vtype != TYPE_FLOAT)
336 parseerror(parser, "Cannot multiply type %s from %s",
337 type_name[exprs[1]->expression.vtype],
338 type_name[exprs[0]->expression.vtype]);
341 switch (exprs[0]->expression.vtype) {
343 if (exprs[1]->expression.vtype == TYPE_VECTOR)
344 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
346 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
349 if (exprs[1]->expression.vtype == TYPE_FLOAT)
350 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
352 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
355 parseerror(parser, "Cannot add type %s from %s",
356 type_name[exprs[1]->expression.vtype],
357 type_name[exprs[0]->expression.vtype]);
362 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
363 exprs[0]->expression.vtype != TYPE_FLOAT)
365 parseerror(parser, "Cannot divide types %s and %s",
366 type_name[exprs[0]->expression.vtype],
367 type_name[exprs[1]->expression.vtype]);
370 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
376 parseerror(parser, "Cannot assign to non-variable");
379 out = (ast_expression*)ast_store_new(ctx,
380 type_store_instr[vars[0]->expression.vtype],
386 parseerror(parser, "failed to apply operand %s", op->op);
390 sy->out[sy->out_count++] = syexp(ctx, out);
394 static ast_expression* parser_expression(parser_t *parser)
396 ast_expression *expr = NULL;
400 MEM_VECTOR_INIT(&sy, out);
401 MEM_VECTOR_INIT(&sy, ops);
407 bool nextwant = true;
408 if (parser->tok == TOKEN_IDENT)
411 ast_value *var = parser_find_var(parser, parser_tokval(parser));
413 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
416 if (!shunt_out_add(&sy, syval(parser_ctx(parser), var))) {
417 parseerror(parser, "out of memory");
421 else if (parser->tok == TOKEN_FLOATCONST) {
422 ast_value *val = parser_const_float(parser, (parser_token(parser)->constval.f));
425 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
426 parseerror(parser, "out of memory");
430 else if (parser->tok == TOKEN_INTCONST) {
431 ast_value *val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
434 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
435 parseerror(parser, "out of memory");
439 else if (parser->tok == '(') {
440 nextwant = false; /* not expecting an operator next */
441 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1))) {
442 parseerror(parser, "out of memory");
447 /* TODO: prefix operators */
448 parseerror(parser, "expected statement");
452 parser->lex->flags.noops = !wantop;
454 if (parser->tok == '(') {
455 /* we expected an operator, this is the function-call operator */
456 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f'))) {
457 parseerror(parser, "out of memory");
461 else if (parser->tok == ')') {
462 /* we do expect an operator next */
463 /* closing an opening paren */
465 parseerror(parser, "unmatched closing paren");
468 if (sy.ops[sy.ops_count-1].paren == 1) {
469 parseerror(parser, "empty parenthesis expression");
472 while (sy.ops_count) {
473 if (sy.ops[sy.ops_count-1].paren == 1) {
477 if (!parser_sy_pop(parser, &sy))
481 else if (parser->tok != TOKEN_OPERATOR) {
482 parseerror(parser, "expected operator or end of statement");
486 /* classify the operator */
487 /* TODO: suffix operators */
489 const oper_info *olast = NULL;
491 for (o = 0; o < operator_count; ++o) {
492 if (!(operators[o].flags & OP_PREFIX) &&
493 !(operators[o].flags & OP_SUFFIX) && /* remove this */
494 !strcmp(parser_tokval(parser), operators[o].op))
499 if (o == operator_count) {
500 /* no operator found... must be the end of the statement */
503 /* found an operator */
506 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
507 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
510 (op->prec < olast->prec) ||
511 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
513 if (!parser_sy_pop(parser, &sy))
515 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
516 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
519 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
523 parser->lex->flags.noops = true;
525 if (!parser_next(parser)) {
528 if (parser->tok == ';') {
532 if (!parser_next(parser)) {
533 parseerror(parser, "Unexpected end of file");
537 while (sy.ops_count) {
538 if (!parser_sy_pop(parser, &sy))
542 parser->lex->flags.noops = true;
544 parseerror(parser, "empty expression");
547 expr = sy.out[0].out;
548 MEM_VECTOR_CLEAR(&sy, out);
549 MEM_VECTOR_CLEAR(&sy, ops);
553 parser->lex->flags.noops = true;
554 MEM_VECTOR_CLEAR(&sy, out);
555 MEM_VECTOR_CLEAR(&sy, ops);
559 static bool parser_variable(parser_t *parser, ast_block *localblock);
560 static bool parser_body_do(parser_t *parser, ast_block *block)
562 if (parser->tok == TOKEN_TYPENAME)
565 if (!parser_variable(parser, block))
569 else if (parser->tok == TOKEN_KEYWORD)
571 if (!strcmp(parser_tokval(parser), "return"))
576 if (!parser_next(parser)) {
577 parseerror(parser, "expected return expression");
581 exp = parser_expression(parser);
584 ret = ast_return_new(exp->expression.node.context, exp);
589 if (!ast_block_exprs_add(block, (ast_expression*)ret)) {
595 parseerror(parser, "Unexpected keyword");
598 else if (parser->tok == '{')
601 parseerror(parser, "TODO: inner blocks: %s", parser_tokval(parser));
606 ast_expression *exp = parser_expression(parser);
609 if (!ast_block_exprs_add(block, exp)) {
617 static ast_block* parser_parse_block(parser_t *parser)
619 size_t oldblocklocal;
620 ast_block *block = NULL;
622 oldblocklocal = parser->blocklocal;
623 parser->blocklocal = parser->locals_count;
625 if (!parser_next(parser)) { /* skip the '{' */
626 parseerror(parser, "expected function body");
630 block = ast_block_new(parser_ctx(parser));
632 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
634 if (parser->tok == '}')
637 if (!parser_body_do(parser, block)) {
638 ast_block_delete(block);
644 if (parser->tok != '}') {
645 ast_block_delete(block);
648 (void)parser_next(parser);
652 parser->blocklocal = oldblocklocal;
656 static bool parser_variable(parser_t *parser, ast_block *localblock)
659 ast_function *func = NULL;
663 int basetype = parser_token(parser)->constval.t;
667 if (!parser_next(parser)) { /* skip basetype or comma */
668 parseerror(parser, "expected variable declaration");
674 ctx = parser_ctx(parser);
675 var = parser_parse_type(parser, basetype, &isfunc);
680 if (parser->tok != TOKEN_IDENT) {
681 parseerror(parser, "expected variable name\n");
685 if (!localblock && parser_find_global(parser, parser_tokval(parser))) {
686 ast_value_delete(var);
687 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
691 if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
692 ast_value_delete(var);
693 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
697 if (!ast_value_set_name(var, parser_tokval(parser))) {
698 parseerror(parser, "failed to set variable name\n");
699 ast_value_delete(var);
704 /* a function was defined */
707 /* turn var into a value of TYPE_FUNCTION, with the old var
710 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
711 func = ast_function_new(ctx, var->name, fval);
712 if (!fval || !func) {
713 ast_value_delete(var);
714 if (fval) ast_value_delete(fval);
715 if (func) ast_function_delete(func);
719 fval->expression.next = (ast_expression*)var;
720 MEM_VECTOR_MOVE(var, params, fval, params);
722 if (!parser_t_functions_add(parser, func)) {
723 ast_value_delete(var);
724 if (fval) ast_value_delete(fval);
725 if (func) ast_function_delete(func);
732 if ( (!localblock && !parser_t_globals_add(parser, var)) ||
733 ( localblock && !parser_t_locals_add(parser, var)) )
735 ast_value_delete(var);
738 if (localblock && !ast_block_locals_add(localblock, var))
740 parser->locals_count--;
741 ast_value_delete(var);
745 if (!parser_next(parser)) {
746 ast_value_delete(var);
750 if (parser->tok == ';') {
751 if (!parser_next(parser))
752 return parser->tok == TOKEN_EOF;
756 if (parser->tok == ',') {
761 if (parser->tok != '=') {
762 parseerror(parser, "expected '=' or ';'");
766 if (!parser_next(parser))
769 if (parser->tok == '#') {
771 parseerror(parser, "cannot declare builtins within functions");
774 if (!isfunc || !func) {
775 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
778 if (!parser_next(parser)) {
779 parseerror(parser, "expected builtin number");
782 if (parser->tok != TOKEN_INTCONST) {
783 parseerror(parser, "builtin number must be an integer constant");
786 if (parser_token(parser)->constval.i <= 0) {
787 parseerror(parser, "builtin number must be positive integer greater than zero");
791 func->builtin = -parser_token(parser)->constval.i;
792 } else if (parser->tok == '{') {
795 ast_function *old = parser->function;
798 parseerror(parser, "cannot declare functions within functions");
802 parser->function = func;
803 block = parser_parse_block(parser);
804 parser->function = old;
809 if (!ast_function_blocks_add(func, block)) {
810 ast_block_delete(block);
815 parseerror(parser, "TODO, const assignment");
818 if (!parser_next(parser))
821 if (parser->tok == ',') {
826 if (parser->tok != ';') {
827 parseerror(parser, "expected semicolon");
831 (void)parser_next(parser);
837 static bool parser_do(parser_t *parser)
839 if (parser->tok == TOKEN_TYPENAME)
841 return parser_variable(parser, NULL);
843 else if (parser->tok == TOKEN_KEYWORD)
845 /* handle 'var' and 'const' */
848 else if (parser->tok == '.')
850 /* entity-member declaration */
855 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
861 bool parser_compile(const char *filename)
867 parser = (parser_t*)mem_a(sizeof(parser_t));
871 memset(parser, 0, sizeof(parser));
873 MEM_VECTOR_INIT(parser, globals);
874 MEM_VECTOR_INIT(parser, locals);
875 parser->lex = lex_open(filename);
878 printf("failed to open file \"%s\"\n", filename);
882 /* initial lexer/parser state */
883 parser->lex->flags.noops = true;
885 if (parser_next(parser))
887 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
889 if (!parser_do(parser)) {
890 if (parser->tok == TOKEN_EOF)
891 parseerror(parser, "unexpected eof");
893 parseerror(parser, "parse error\n");
894 lex_close(parser->lex);
901 lex_close(parser->lex);
903 ir = ir_builder_new("gmqcc_out");
905 printf("failed to allocate builder\n");
909 for (i = 0; i < parser->imm_float_count; ++i) {
910 if (!ast_global_codegen(parser->imm_float[i], ir)) {
911 printf("failed to generate global %s\n", parser->imm_float[i]->name);
914 for (i = 0; i < parser->globals_count; ++i) {
915 if (!ast_global_codegen(parser->globals[i], ir)) {
916 printf("failed to generate global %s\n", parser->globals[i]->name);
919 for (i = 0; i < parser->functions_count; ++i) {
920 if (!ast_function_codegen(parser->functions[i], ir)) {
921 printf("failed to generate function %s\n", parser->functions[i]->name);
923 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
924 printf("failed to finalize function %s\n", parser->functions[i]->name);
928 ir_builder_dump(ir, printf);
931 for (i = 0; i < parser->globals_count; ++i) {
932 ast_value_delete(parser->globals[i]);
934 MEM_VECTOR_CLEAR(parser, globals);