16 MEM_VECTOR_MAKE(varentry_t, globals);
17 MEM_VECTOR_MAKE(varentry_t, fields);
18 MEM_VECTOR_MAKE(ast_function*, functions);
19 MEM_VECTOR_MAKE(ast_value*, imm_float);
20 MEM_VECTOR_MAKE(ast_value*, imm_string);
21 MEM_VECTOR_MAKE(ast_value*, imm_vector);
23 ast_function *function;
24 MEM_VECTOR_MAKE(varentry_t, locals);
29 /* TYPE_FIELD -> parser_find_fields is used instead of find_var
30 * TODO: TYPE_VECTOR -> x, y and z are accepted in the gmqcc standard
31 * anything else: type error
36 MEM_VEC_FUNCTIONS(parser_t, varentry_t, globals)
37 MEM_VEC_FUNCTIONS(parser_t, varentry_t, fields)
38 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_float)
39 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_string)
40 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_vector)
41 MEM_VEC_FUNCTIONS(parser_t, varentry_t, locals)
42 MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
44 void parseerror(parser_t *parser, const char *fmt, ...)
51 printf("error %s:%lu: ", parser->lex->tok->ctx.file, (unsigned long)parser->lex->tok->ctx.line);
62 bool parser_next(parser_t *parser)
64 /* lex_do kills the previous token */
65 parser->tok = lex_do(parser->lex);
66 if (parser->tok == TOKEN_EOF || parser->tok >= TOKEN_ERROR)
71 /* lift a token out of the parser so it's not destroyed by parser_next */
72 token *parser_lift(parser_t *parser)
74 token *tok = parser->lex->tok;
75 parser->lex->tok = NULL;
79 #define parser_tokval(p) (p->lex->tok->value)
80 #define parser_token(p) (p->lex->tok)
81 #define parser_ctx(p) (p->lex->tok->ctx)
83 ast_value* parser_const_float(parser_t *parser, double d)
87 for (i = 0; i < parser->imm_float_count; ++i) {
88 if (parser->imm_float[i]->constval.vfloat == d)
89 return parser->imm_float[i];
91 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
93 out->constval.vfloat = d;
94 if (!parser_t_imm_float_add(parser, out)) {
95 ast_value_delete(out);
101 ast_value* parser_const_string(parser_t *parser, const char *str)
105 for (i = 0; i < parser->imm_string_count; ++i) {
106 if (!strcmp(parser->imm_string[i]->constval.vstring, str))
107 return parser->imm_string[i];
109 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_STRING);
111 out->constval.vstring = util_strdup(str);
112 if (!parser_t_imm_string_add(parser, out)) {
113 ast_value_delete(out);
119 ast_value* parser_const_vector(parser_t *parser, vector v)
123 for (i = 0; i < parser->imm_vector_count; ++i) {
124 if (!memcmp(&parser->imm_vector[i]->constval.vvec, &v, sizeof(v)))
125 return parser->imm_vector[i];
127 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_VECTOR);
129 out->constval.vvec = v;
130 if (!parser_t_imm_vector_add(parser, out)) {
131 ast_value_delete(out);
137 ast_expression* parser_find_field(parser_t *parser, const char *name)
140 for (i = 0; i < parser->fields_count; ++i) {
141 if (!strcmp(parser->fields[i].name, name))
142 return parser->fields[i].var;
147 ast_expression* parser_find_global(parser_t *parser, const char *name)
150 for (i = 0; i < parser->globals_count; ++i) {
151 if (!strcmp(parser->globals[i].name, name))
152 return parser->globals[i].var;
157 ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto)
161 for (i = parser->locals_count; i > upto;) {
163 if (!strcmp(parser->locals[i].name, name))
164 return parser->locals[i].var;
166 fun = parser->function->vtype;
167 for (i = 0; i < fun->expression.params_count; ++i) {
168 if (!strcmp(fun->expression.params[i]->name, name))
169 return (ast_expression*)(fun->expression.params[i]);
174 ast_expression* parser_find_var(parser_t *parser, const char *name)
177 v = parser_find_local(parser, name, 0);
178 if (!v) v = parser_find_global(parser, name);
183 MEM_VECTOR_MAKE(ast_value*, p);
185 MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
187 static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
191 lex_ctx ctx = parser_ctx(parser);
192 int vtype = basetype;
196 MEM_VECTOR_INIT(¶ms, p);
200 if (parser->tok == '(') {
206 if (!parser_next(parser))
209 if (parser->tok == ')')
212 temptype = parser_token(parser)->constval.t;
213 if (!parser_next(parser))
216 param = parser_parse_type(parser, temptype, &dummy);
222 if (parser->tok == TOKEN_IDENT) {
223 /* named parameter */
224 if (!ast_value_set_name(param, parser_tokval(parser)))
226 if (!parser_next(parser))
230 if (!paramlist_t_p_add(¶ms, param)) {
231 parseerror(parser, "Out of memory while parsing typename");
235 if (parser->tok == ',')
237 if (parser->tok == ')')
239 parseerror(parser, "Unexpected token");
242 if (!parser_next(parser))
246 var = ast_value_new(ctx, "<unnamed>", vtype);
249 MEM_VECTOR_MOVE(¶ms, p, &var->expression, params);
252 for (i = 0; i < params.p_count; ++i)
253 ast_value_delete(params.p[i]);
254 MEM_VECTOR_CLEAR(¶ms, p);
260 size_t etype; /* 0 = expression, others are operators */
264 ast_block *block; /* for commas and function calls */
269 MEM_VECTOR_MAKE(sy_elem, out);
270 MEM_VECTOR_MAKE(sy_elem, ops);
272 MEM_VEC_FUNCTIONS(shunt, sy_elem, out)
273 MEM_VEC_FUNCTIONS(shunt, sy_elem, ops)
275 static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
285 static sy_elem syblock(lex_ctx ctx, ast_block *v) {
288 e.out = (ast_expression*)v;
295 static sy_elem syop(lex_ctx ctx, const oper_info *op) {
297 e.etype = 1 + (op - operators);
305 static sy_elem syparen(lex_ctx ctx, int p, size_t off) {
317 # define DEBUGSHUNTDO(x) x
319 # define DEBUGSHUNTDO(x)
322 static bool parser_sy_pop(parser_t *parser, shunt *sy)
326 ast_expression *out = NULL;
327 ast_expression *exprs[3];
328 ast_block *blocks[3];
331 if (!sy->ops_count) {
332 parseerror(parser, "internal error: missing operator");
336 if (sy->ops[sy->ops_count-1].paren) {
337 parseerror(parser, "unmatched parenthesis");
341 op = &operators[sy->ops[sy->ops_count-1].etype - 1];
342 ctx = sy->ops[sy->ops_count-1].ctx;
344 DEBUGSHUNTDO(printf("apply %s\n", op->op));
346 if (sy->out_count < op->operands) {
347 parseerror(parser, "internal error: not enough operands: %i", sy->out_count);
353 sy->out_count -= op->operands;
354 for (i = 0; i < op->operands; ++i) {
355 exprs[i] = sy->out[sy->out_count+i].out;
356 blocks[i] = sy->out[sy->out_count+i].block;
359 if (blocks[0] && !blocks[0]->exprs_count && op->id != opid1(',')) {
360 parseerror(parser, "internal error: operator cannot be applied on empty blocks");
367 parseerror(parser, "internal error: unhandled operand");
371 if (exprs[0]->expression.vtype == TYPE_ENTITY) {
372 if (exprs[1]->expression.vtype != TYPE_FIELD) {
373 parseerror(parser, "type error: right hand of member-operand should be an entity-field");
376 out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
378 else if (exprs[0]->expression.vtype == TYPE_VECTOR) {
379 parseerror(parser, "internal error: vector access is not supposed to be handled at this point");
383 parseerror(parser, "type error: member-of operator on something that is not an entity or vector");
390 if (!ast_block_exprs_add(blocks[0], exprs[1]))
393 blocks[0] = ast_block_new(ctx);
394 if (!ast_block_exprs_add(blocks[0], exprs[0]) ||
395 !ast_block_exprs_add(blocks[0], exprs[1]))
400 if (!ast_block_set_type(blocks[0], exprs[1]))
403 sy->out[sy->out_count++] = syblock(ctx, blocks[0]);
407 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
408 parseerror(parser, "Cannot add type %s and %s",
409 type_name[exprs[0]->expression.vtype],
410 type_name[exprs[1]->expression.vtype]);
413 switch (exprs[0]->expression.vtype) {
415 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
418 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
421 parseerror(parser, "Cannot add type %s and %s",
422 type_name[exprs[0]->expression.vtype],
423 type_name[exprs[1]->expression.vtype]);
428 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
429 parseerror(parser, "Cannot subtract type %s from %s",
430 type_name[exprs[1]->expression.vtype],
431 type_name[exprs[0]->expression.vtype]);
434 switch (exprs[0]->expression.vtype) {
436 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
439 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
442 parseerror(parser, "Cannot add type %s from %s",
443 type_name[exprs[1]->expression.vtype],
444 type_name[exprs[0]->expression.vtype]);
449 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
450 exprs[0]->expression.vtype != TYPE_VECTOR &&
451 exprs[0]->expression.vtype != TYPE_FLOAT &&
452 exprs[1]->expression.vtype != TYPE_VECTOR &&
453 exprs[1]->expression.vtype != TYPE_FLOAT)
455 parseerror(parser, "Cannot multiply type %s from %s",
456 type_name[exprs[1]->expression.vtype],
457 type_name[exprs[0]->expression.vtype]);
460 switch (exprs[0]->expression.vtype) {
462 if (exprs[1]->expression.vtype == TYPE_VECTOR)
463 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
465 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
468 if (exprs[1]->expression.vtype == TYPE_FLOAT)
469 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
471 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
474 parseerror(parser, "Cannot add type %s from %s",
475 type_name[exprs[1]->expression.vtype],
476 type_name[exprs[0]->expression.vtype]);
481 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
482 exprs[0]->expression.vtype != TYPE_FLOAT)
484 parseerror(parser, "Cannot divide types %s and %s",
485 type_name[exprs[0]->expression.vtype],
486 type_name[exprs[1]->expression.vtype]);
489 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
494 if (ast_istype(exprs[0], ast_entfield))
495 assignop = type_storep_instr[exprs[0]->expression.vtype];
497 assignop = type_store_instr[exprs[0]->expression.vtype];
498 out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
503 parseerror(parser, "failed to apply operand %s", op->op);
507 DEBUGSHUNTDO(printf("applied %s\n", op->op));
508 sy->out[sy->out_count++] = syexp(ctx, out);
512 static bool parser_close_call(parser_t *parser, shunt *sy)
514 /* was a function call */
522 fid = sy->ops[sy->ops_count].off;
524 /* out[fid] is the function
525 * everything above is parameters...
527 * 1 params = ast_expression
531 if (sy->out_count < 1 || sy->out_count <= fid) {
532 parseerror(parser, "internal error: function call needs function and parameter list...");
536 fun = sy->out[fid].out;
538 call = ast_call_new(sy->ops[sy->ops_count].ctx, fun);
540 parseerror(parser, "out of memory");
544 if (fid+1 == sy->out_count) {
547 } else if (fid+2 == sy->out_count) {
550 params = sy->out[sy->out_count].block;
554 if (!ast_call_params_add(call, sy->out[sy->out_count].out)) {
555 ast_delete(sy->out[sy->out_count].out);
556 parseerror(parser, "out of memory");
560 paramcount = params->exprs_count;
561 MEM_VECTOR_MOVE(params, exprs, call, params);
565 parseerror(parser, "invalid function call");
569 /* overwrite fid, the function, with a call */
570 sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
572 if (fun->expression.vtype != TYPE_FUNCTION) {
573 parseerror(parser, "not a function");
577 if (!fun->expression.next) {
578 parseerror(parser, "could not determine function return type");
581 if (fun->expression.params_count != paramcount) {
582 parseerror(parser, "expected %i parameters, got %i", (int)fun->expression.params_count, paramcount);
590 static bool parser_close_paren(parser_t *parser, shunt *sy, bool functions_only)
592 if (!sy->ops_count) {
593 parseerror(parser, "unmatched closing paren");
596 if (sy->ops[sy->ops_count-1].paren == 1) {
597 parseerror(parser, "empty parenthesis expression");
600 while (sy->ops_count) {
601 if (sy->ops[sy->ops_count-1].paren == 'f') {
602 if (!parser_close_call(parser, sy))
606 if (sy->ops[sy->ops_count-1].paren == 1) {
608 return !functions_only;
610 if (!parser_sy_pop(parser, sy))
616 static ast_expression* parser_expression(parser_t *parser)
618 ast_expression *expr = NULL;
621 bool gotmemberof = false;
623 /* count the parens because an if starts with one, so the
624 * end of a condition is an unmatched closing paren
628 MEM_VECTOR_INIT(&sy, out);
629 MEM_VECTOR_INIT(&sy, ops);
636 parser->memberof = 0;
639 bool nextwant = true;
640 if (parser->tok == TOKEN_IDENT)
644 if (opts_standard == COMPILER_GMQCC)
646 if (parser->memberof == TYPE_ENTITY)
647 var = parser_find_field(parser, parser_tokval(parser));
648 else if (parser->memberof == TYPE_VECTOR)
650 parseerror(parser, "TODO: implement effective vector member access");
653 else if (parser->memberof) {
654 parseerror(parser, "namespace for member not found");
658 var = parser_find_var(parser, parser_tokval(parser));
660 var = parser_find_var(parser, parser_tokval(parser));
662 var = parser_find_field(parser, parser_tokval(parser));
665 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
668 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), var))) {
669 parseerror(parser, "out of memory");
672 DEBUGSHUNTDO(printf("push %s\n", parser_tokval(parser)));
674 else if (parser->tok == TOKEN_FLOATCONST) {
675 ast_value *val = parser_const_float(parser, (parser_token(parser)->constval.f));
678 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
679 parseerror(parser, "out of memory");
682 DEBUGSHUNTDO(printf("push %g\n", parser_token(parser)->constval.f));
684 else if (parser->tok == TOKEN_INTCONST) {
685 ast_value *val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
688 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
689 parseerror(parser, "out of memory");
692 DEBUGSHUNTDO(printf("push %i\n", parser_token(parser)->constval.i));
694 else if (parser->tok == TOKEN_STRINGCONST) {
695 ast_value *val = parser_const_string(parser, parser_tokval(parser));
698 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
699 parseerror(parser, "out of memory");
702 DEBUGSHUNTDO(printf("push string\n"));
704 else if (parser->tok == TOKEN_VECTORCONST) {
705 ast_value *val = parser_const_vector(parser, parser_token(parser)->constval.v);
708 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
709 parseerror(parser, "out of memory");
712 DEBUGSHUNTDO(printf("push '%g %g %g'\n",
713 parser_token(parser)->constval.v.x,
714 parser_token(parser)->constval.v.y,
715 parser_token(parser)->constval.v.z));
717 else if (parser->tok == '(') {
719 nextwant = false; /* not expecting an operator next */
720 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1, 0))) {
721 parseerror(parser, "out of memory");
724 DEBUGSHUNTDO(printf("push (\n"));
726 else if (parser->tok == ')') {
727 DEBUGSHUNTDO(printf("call )\n"));
731 /* allowed for function calls */
732 if (!parser_close_paren(parser, &sy, true))
736 /* TODO: prefix operators */
737 parseerror(parser, "expected statement");
741 parser->lex->flags.noops = !wantop;
743 if (parser->tok == '(') {
744 DEBUGSHUNTDO(printf("push (\n"));
746 /* we expected an operator, this is the function-call operator */
747 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f', sy.out_count-1))) {
748 parseerror(parser, "out of memory");
752 else if (parser->tok == ')') {
753 DEBUGSHUNTDO(printf("calc )\n"));
757 /* we do expect an operator next */
758 /* closing an opening paren */
759 if (!parser_close_paren(parser, &sy, false))
762 else if (parser->tok != TOKEN_OPERATOR) {
763 parseerror(parser, "expected operator or end of statement");
767 /* classify the operator */
768 /* TODO: suffix operators */
770 const oper_info *olast = NULL;
772 for (o = 0; o < operator_count; ++o) {
773 if (!(operators[o].flags & OP_PREFIX) &&
774 !(operators[o].flags & OP_SUFFIX) && /* remove this */
775 !strcmp(parser_tokval(parser), operators[o].op))
780 if (o == operator_count) {
781 /* no operator found... must be the end of the statement */
784 /* found an operator */
786 if (op->id == opid1('.')) {
787 /* for gmqcc standard: open up the namespace of the previous type */
788 ast_expression *prevex = sy.out[sy.out_count-1].out;
790 parseerror(parser, "unexpected member operator");
793 if (prevex->expression.vtype == TYPE_ENTITY)
794 parser->memberof = TYPE_ENTITY;
795 else if (prevex->expression.vtype == TYPE_VECTOR)
796 parser->memberof = TYPE_VECTOR;
798 parseerror(parser, "type error: type has no members");
804 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
805 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
808 (op->prec < olast->prec) ||
809 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
811 if (!parser_sy_pop(parser, &sy))
813 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
814 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
819 DEBUGSHUNTDO(printf("push operator %s\n", op->op));
820 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
824 parser->lex->flags.noops = true;
826 if (!parser_next(parser)) {
829 if (parser->tok == ';') {
833 if (parens >= 0 && !parser_next(parser)) {
834 parseerror(parser, "Unexpected end of file");
838 while (sy.ops_count) {
839 if (!parser_sy_pop(parser, &sy))
843 parser->lex->flags.noops = true;
845 parseerror(parser, "empty expression");
848 expr = sy.out[0].out;
849 MEM_VECTOR_CLEAR(&sy, out);
850 MEM_VECTOR_CLEAR(&sy, ops);
851 DEBUGSHUNTDO(printf("shut done\n"));
855 parser->lex->flags.noops = true;
856 MEM_VECTOR_CLEAR(&sy, out);
857 MEM_VECTOR_CLEAR(&sy, ops);
861 static bool parser_variable(parser_t *parser, ast_block *localblock);
862 static ast_block* parser_parse_block(parser_t *parser);
863 static ast_expression* parser_parse_statement_or_block(parser_t *parser);
864 static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expression **out)
866 if (parser->tok == TOKEN_TYPENAME)
870 parseerror(parser, "cannot declare a variable from here");
873 if (!parser_variable(parser, block))
878 else if (parser->tok == TOKEN_KEYWORD)
880 if (!strcmp(parser_tokval(parser), "return"))
882 ast_expression *exp = NULL;
883 ast_return *ret = NULL;
884 ast_value *expected = parser->function->vtype;
886 if (!parser_next(parser)) {
887 parseerror(parser, "expected return expression");
891 if (parser->tok != ';') {
892 exp = parser_expression(parser);
896 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
897 parseerror(parser, "return with invalid expression");
900 ret = ast_return_new(exp->expression.node.context, exp);
906 *out = (ast_expression*)ret;
907 } else if (!parser_next(parser)) {
908 parseerror(parser, "expected semicolon");
909 if (expected->expression.next->expression.vtype != TYPE_VOID) {
910 parseerror(parser, "return without value");
915 else if (!strcmp(parser_tokval(parser), "if"))
918 ast_expression *cond, *ontrue, *onfalse = NULL;
920 lex_ctx ctx = parser_ctx(parser);
922 /* skip the 'if' and check for opening paren */
923 if (!parser_next(parser) || parser->tok != '(') {
924 parseerror(parser, "expected 'if' condition in parenthesis");
927 /* parse into the expression */
928 if (!parser_next(parser)) {
929 parseerror(parser, "expected 'if' condition after opening paren");
932 /* parse the condition */
933 cond = parser_expression(parser);
937 if (parser->tok != ')') {
938 parseerror(parser, "expected closing paren after 'if' condition");
942 /* parse into the 'then' branch */
943 if (!parser_next(parser)) {
944 parseerror(parser, "expected statement for on-true branch of 'if'");
948 ontrue = parser_parse_statement_or_block(parser);
953 /* check for an else */
954 if (!strcmp(parser_tokval(parser), "else")) {
955 /* parse into the 'else' branch */
956 if (!parser_next(parser)) {
957 parseerror(parser, "expected on-false branch after 'else'");
962 onfalse = parser_parse_statement_or_block(parser);
970 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
971 *out = (ast_expression*)ifthen;
974 parseerror(parser, "Unexpected keyword");
977 else if (parser->tok == '{')
980 inner = parser_parse_block(parser);
983 *out = (ast_expression*)inner;
988 ast_expression *exp = parser_expression(parser);
996 static void parser_pop_local(parser_t *parser)
998 parser->locals_count--;
999 mem_d(parser->locals[parser->locals_count].name);
1002 static ast_block* parser_parse_block(parser_t *parser)
1004 size_t oldblocklocal;
1005 ast_block *block = NULL;
1007 oldblocklocal = parser->blocklocal;
1008 parser->blocklocal = parser->locals_count;
1010 if (!parser_next(parser)) { /* skip the '{' */
1011 parseerror(parser, "expected function body");
1015 block = ast_block_new(parser_ctx(parser));
1017 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1019 ast_expression *expr;
1020 if (parser->tok == '}')
1023 if (!parser_parse_statement(parser, block, &expr)) {
1024 ast_block_delete(block);
1030 if (!ast_block_exprs_add(block, expr)) {
1032 ast_block_delete(block);
1038 if (parser->tok != '}') {
1039 ast_block_delete(block);
1042 (void)parser_next(parser);
1046 while (parser->locals_count > parser->blocklocal)
1047 parser_pop_local(parser);
1048 parser->blocklocal = oldblocklocal;
1049 /* unroll the local vector */
1053 static ast_expression* parser_parse_statement_or_block(parser_t *parser)
1055 ast_expression *expr;
1056 if (parser->tok == '{')
1057 return (ast_expression*)parser_parse_block(parser);
1058 if (!parser_parse_statement(parser, NULL, &expr))
1063 static bool parser_variable(parser_t *parser, ast_block *localblock)
1065 bool isfunc = false;
1066 ast_function *func = NULL;
1071 int basetype = parser_token(parser)->constval.t;
1075 if (!parser_next(parser)) { /* skip basetype or comma */
1076 parseerror(parser, "expected variable declaration");
1082 ctx = parser_ctx(parser);
1083 var = parser_parse_type(parser, basetype, &isfunc);
1088 if (parser->tok != TOKEN_IDENT) {
1089 parseerror(parser, "expected variable name\n");
1093 if (!localblock && parser_find_global(parser, parser_tokval(parser))) {
1094 ast_value_delete(var);
1095 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
1099 if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
1100 ast_value_delete(var);
1101 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
1105 if (!ast_value_set_name(var, parser_tokval(parser))) {
1106 parseerror(parser, "failed to set variable name\n");
1107 ast_value_delete(var);
1112 /* a function was defined */
1115 /* turn var into a value of TYPE_FUNCTION, with the old var
1118 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1119 func = ast_function_new(ctx, var->name, fval);
1120 if (!fval || !func) {
1121 ast_value_delete(var);
1122 if (fval) ast_value_delete(fval);
1123 if (func) ast_function_delete(func);
1127 fval->expression.next = (ast_expression*)var;
1128 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1130 if (!parser_t_functions_add(parser, func)) {
1131 ast_value_delete(var);
1132 if (fval) ast_value_delete(fval);
1133 if (func) ast_function_delete(func);
1140 varent.name = util_strdup(var->name);
1141 varent.var = (ast_expression*)var;
1142 if (var->expression.vtype == TYPE_VECTOR)
1144 size_t len = strlen(varent.name);
1145 varentry_t vx, vy, vz;
1146 vx.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 0);
1147 vy.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 1);
1148 vz.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 2);
1149 vx.name = mem_a(len+3);
1150 vy.name = mem_a(len+3);
1151 vz.name = mem_a(len+3);
1152 strcpy(vx.name, varent.name);
1153 strcpy(vy.name, varent.name);
1154 strcpy(vz.name, varent.name);
1155 vx.name[len] = vy.name[len] = vz.name[len] = '_';
1156 vx.name[len+1] = 'x';
1157 vy.name[len+1] = 'y';
1158 vz.name[len+1] = 'z';
1159 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
1162 (void)!parser_t_globals_add(parser, varent);
1163 (void)!parser_t_globals_add(parser, vx);
1164 (void)!parser_t_globals_add(parser, vy);
1165 (void)!parser_t_globals_add(parser, vz);
1167 (void)!parser_t_locals_add(parser, varent);
1168 (void)!parser_t_locals_add(parser, vx);
1169 (void)!parser_t_locals_add(parser, vy);
1170 (void)!parser_t_locals_add(parser, vz);
1175 if ( (!localblock && !parser_t_globals_add(parser, varent)) ||
1176 ( localblock && !parser_t_locals_add(parser, varent)) )
1178 ast_value_delete(var);
1182 if (localblock && !ast_block_locals_add(localblock, var))
1184 parser_pop_local(parser);
1185 ast_value_delete(var);
1189 if (!parser_next(parser)) {
1190 ast_value_delete(var);
1194 if (parser->tok == ';') {
1195 if (!parser_next(parser))
1196 return parser->tok == TOKEN_EOF;
1200 if (parser->tok == ',') {
1205 if (parser->tok != '=') {
1206 parseerror(parser, "expected '=' or ';'");
1210 if (!parser_next(parser))
1213 if (parser->tok == '#') {
1215 parseerror(parser, "cannot declare builtins within functions");
1218 if (!isfunc || !func) {
1219 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
1222 if (!parser_next(parser)) {
1223 parseerror(parser, "expected builtin number");
1226 if (parser->tok != TOKEN_INTCONST) {
1227 parseerror(parser, "builtin number must be an integer constant");
1230 if (parser_token(parser)->constval.i <= 0) {
1231 parseerror(parser, "builtin number must be positive integer greater than zero");
1235 func->builtin = -parser_token(parser)->constval.i;
1236 } else if (parser->tok == '{') {
1239 ast_function *old = parser->function;
1242 parseerror(parser, "cannot declare functions within functions");
1246 parser->function = func;
1247 block = parser_parse_block(parser);
1248 parser->function = old;
1253 if (!ast_function_blocks_add(func, block)) {
1254 ast_block_delete(block);
1259 parseerror(parser, "TODO, const assignment");
1262 if (!parser_next(parser))
1265 if (parser->tok == ',') {
1270 if (parser->tok != ';') {
1271 parseerror(parser, "expected semicolon");
1275 (void)parser_next(parser);
1281 static bool parser_do(parser_t *parser)
1283 if (parser->tok == TOKEN_TYPENAME)
1285 return parser_variable(parser, NULL);
1287 else if (parser->tok == TOKEN_KEYWORD)
1289 /* handle 'var' and 'const' */
1292 else if (parser->tok == '.')
1296 bool isfunc = false;
1298 lex_ctx ctx = parser_ctx(parser);
1301 /* entity-member declaration */
1302 if (!parser_next(parser) || parser->tok != TOKEN_TYPENAME) {
1303 parseerror(parser, "expected member variable definition");
1307 /* remember the base/return type */
1308 basetype = parser_token(parser)->constval.t;
1310 /* parse into the declaration */
1311 if (!parser_next(parser)) {
1312 parseerror(parser, "expected field def");
1316 /* parse the field type fully */
1317 var = parser_parse_type(parser, basetype, &isfunc);
1321 /* now the field name */
1322 if (parser->tok != TOKEN_IDENT) {
1323 parseerror(parser, "expected field name");
1328 /* check for an existing field
1329 * in original qc we also have to check for an existing
1330 * global named like the field
1332 if (opts_standard == COMPILER_QCC) {
1333 if (parser_find_global(parser, parser_tokval(parser))) {
1334 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
1339 if (parser_find_field(parser, parser_tokval(parser))) {
1340 parseerror(parser, "field %s already exists", parser_tokval(parser));
1345 /* if it was a function, turn it into a function */
1348 /* turn var into a value of TYPE_FUNCTION, with the old var
1351 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1353 ast_value_delete(var);
1354 ast_value_delete(fval);
1358 fval->expression.next = (ast_expression*)var;
1359 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1364 /* turn it into a field */
1365 fld = ast_value_new(ctx, parser_tokval(parser), TYPE_FIELD);
1366 fld->expression.next = (ast_expression*)var;
1368 varent.var = (ast_expression*)fld;
1369 if (var->expression.vtype == TYPE_VECTOR)
1371 /* create _x, _y and _z fields as well */
1372 parseerror(parser, "TODO: vector field members (_x,_y,_z)");
1377 varent.name = util_strdup(fld->name);
1378 (void)!parser_t_fields_add(parser, varent);
1380 /* end with a semicolon */
1381 if (!parser_next(parser) || parser->tok != ';') {
1382 parseerror(parser, "semicolon expected");
1386 /* skip the semicolon */
1387 if (!parser_next(parser))
1388 return parser->tok == TOKEN_EOF;
1394 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
1400 static parser_t *parser;
1404 parser = (parser_t*)mem_a(sizeof(parser_t));
1408 memset(parser, 0, sizeof(parser));
1410 MEM_VECTOR_INIT(parser, globals);
1411 MEM_VECTOR_INIT(parser, locals);
1415 bool parser_compile(const char *filename)
1417 parser->lex = lex_open(filename);
1419 printf("failed to open file \"%s\"\n", filename);
1423 /* initial lexer/parser state */
1424 parser->lex->flags.noops = true;
1426 if (parser_next(parser))
1428 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1430 if (!parser_do(parser)) {
1431 if (parser->tok == TOKEN_EOF)
1432 parseerror(parser, "unexpected eof");
1434 parseerror(parser, "parse error\n");
1435 lex_close(parser->lex);
1442 lex_close(parser->lex);
1444 return !parser->errors;
1447 void parser_cleanup()
1450 for (i = 0; i < parser->functions_count; ++i) {
1451 ast_delete(parser->functions[i]);
1453 for (i = 0; i < parser->imm_vector_count; ++i) {
1454 ast_delete(parser->imm_vector[i]);
1456 for (i = 0; i < parser->imm_string_count; ++i) {
1457 ast_delete(parser->imm_string[i]);
1459 for (i = 0; i < parser->imm_float_count; ++i) {
1460 ast_delete(parser->imm_float[i]);
1462 for (i = 0; i < parser->globals_count; ++i) {
1463 ast_delete(parser->globals[i].var);
1464 mem_d(parser->globals[i].name);
1466 MEM_VECTOR_CLEAR(parser, globals);
1471 bool parser_finish(const char *output)
1476 if (!parser->errors)
1478 ir = ir_builder_new("gmqcc_out");
1480 printf("failed to allocate builder\n");
1484 for (i = 0; i < parser->imm_float_count; ++i) {
1485 if (!ast_global_codegen(parser->imm_float[i], ir)) {
1486 printf("failed to generate global %s\n", parser->imm_float[i]->name);
1487 ir_builder_delete(ir);
1491 for (i = 0; i < parser->imm_string_count; ++i) {
1492 if (!ast_global_codegen(parser->imm_string[i], ir)) {
1493 printf("failed to generate global %s\n", parser->imm_string[i]->name);
1494 ir_builder_delete(ir);
1498 for (i = 0; i < parser->imm_vector_count; ++i) {
1499 if (!ast_global_codegen(parser->imm_vector[i], ir)) {
1500 printf("failed to generate global %s\n", parser->imm_vector[i]->name);
1501 ir_builder_delete(ir);
1505 for (i = 0; i < parser->fields_count; ++i) {
1508 if (!ast_istype(parser->fields[i].var, ast_value))
1510 field = (ast_value*)parser->fields[i].var;
1511 isconst = field->isconst;
1512 field->isconst = false;
1513 if (!ast_global_codegen((ast_value*)field, ir)) {
1514 printf("failed to generate field %s\n", field->name);
1515 ir_builder_delete(ir);
1520 ast_expression *subtype;
1521 field->isconst = true;
1522 subtype = field->expression.next;
1523 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
1524 if (subtype->expression.vtype == TYPE_FIELD)
1525 ifld->fieldtype = subtype->expression.next->expression.vtype;
1526 else if (subtype->expression.vtype == TYPE_FUNCTION)
1527 ifld->outtype = subtype->expression.next->expression.vtype;
1528 (void)!ir_value_set_field(field->ir_v, ifld);
1531 for (i = 0; i < parser->globals_count; ++i) {
1532 if (!ast_istype(parser->globals[i].var, ast_value))
1534 if (!ast_global_codegen((ast_value*)(parser->globals[i].var), ir)) {
1535 printf("failed to generate global %s\n", parser->globals[i].name);
1536 ir_builder_delete(ir);
1540 for (i = 0; i < parser->functions_count; ++i) {
1541 if (!ast_function_codegen(parser->functions[i], ir)) {
1542 printf("failed to generate function %s\n", parser->functions[i]->name);
1543 ir_builder_delete(ir);
1546 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
1547 printf("failed to finalize function %s\n", parser->functions[i]->name);
1548 ir_builder_delete(ir);
1553 ir_builder_dump(ir, printf);
1555 if (!ir_builder_generate(ir, output)) {
1556 printf("*** failed to generate output file\n");
1557 ir_builder_delete(ir);
1561 ir_builder_delete(ir);
1565 printf("*** there were compile errors\n");