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 if (exprs[0]->expression.vteyp != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) {
414 parseerror(parser, "type error: %s - %s not defined",
415 type_name[exprs[0]->expression.vtype],
416 type_name[exprs[1]->expression.vtype]);
419 switch (exprs[0]->expression.vtype) {
421 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
424 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
427 parseerror(parser, "type error: cannot add type %s to %s",
428 type_name[exprs[0]->expression.vtype],
429 type_name[exprs[1]->expression.vtype]);
434 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
435 parseerror(parser, "type error: cannot subtract type %s from %s",
436 type_name[exprs[1]->expression.vtype],
437 type_name[exprs[0]->expression.vtype]);
440 if (exprs[0]->expression.vteyp != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) {
441 parseerror(parser, "type error: %s - %s not defined",
442 type_name[exprs[0]->expression.vtype],
443 type_name[exprs[1]->expression.vtype]);
446 switch (exprs[0]->expression.vtype) {
448 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
451 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
454 parseerror(parser, "type error: cannot subtract type %s from %s",
455 type_name[exprs[1]->expression.vtype],
456 type_name[exprs[0]->expression.vtype]);
461 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
462 exprs[0]->expression.vtype != TYPE_VECTOR &&
463 exprs[0]->expression.vtype != TYPE_FLOAT &&
464 exprs[1]->expression.vtype != TYPE_VECTOR &&
465 exprs[1]->expression.vtype != TYPE_FLOAT)
467 parseerror(parser, "type error: cannot multiply type %s by %s",
468 type_name[exprs[1]->expression.vtype],
469 type_name[exprs[0]->expression.vtype]);
472 switch (exprs[0]->expression.vtype) {
474 if (exprs[1]->expression.vtype == TYPE_VECTOR)
475 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
477 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
480 if (exprs[1]->expression.vtype == TYPE_FLOAT)
481 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
483 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
486 parseerror(parser, "type error: cannot multiplye type %s by %s",
487 type_name[exprs[1]->expression.vtype],
488 type_name[exprs[0]->expression.vtype]);
493 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
494 exprs[0]->expression.vtype != TYPE_FLOAT)
496 parseerror(parser, "type error: cannot divide types %s and %s",
497 type_name[exprs[0]->expression.vtype],
498 type_name[exprs[1]->expression.vtype]);
501 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
505 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
506 exprs[0]->expression.vtype != TYPE_FLOAT)
508 parseerror(parser, "type error: cannot perform bit operations on types %s and %s",
509 type_name[exprs[0]->expression.vtype],
510 type_name[exprs[1]->expression.vtype]);
513 out = (ast_expression*)ast_binary_new(ctx,
514 (op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
520 if (ast_istype(exprs[0], ast_entfield))
521 assignop = type_storep_instr[exprs[0]->expression.vtype];
523 assignop = type_store_instr[exprs[0]->expression.vtype];
524 out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
529 parseerror(parser, "failed to apply operand %s", op->op);
533 DEBUGSHUNTDO(printf("applied %s\n", op->op));
534 sy->out[sy->out_count++] = syexp(ctx, out);
538 static bool parser_close_call(parser_t *parser, shunt *sy)
540 /* was a function call */
548 fid = sy->ops[sy->ops_count].off;
550 /* out[fid] is the function
551 * everything above is parameters...
553 * 1 params = ast_expression
557 if (sy->out_count < 1 || sy->out_count <= fid) {
558 parseerror(parser, "internal error: function call needs function and parameter list...");
562 fun = sy->out[fid].out;
564 call = ast_call_new(sy->ops[sy->ops_count].ctx, fun);
566 parseerror(parser, "out of memory");
570 if (fid+1 == sy->out_count) {
573 } else if (fid+2 == sy->out_count) {
576 params = sy->out[sy->out_count].block;
580 if (!ast_call_params_add(call, sy->out[sy->out_count].out)) {
581 ast_delete(sy->out[sy->out_count].out);
582 parseerror(parser, "out of memory");
586 paramcount = params->exprs_count;
587 MEM_VECTOR_MOVE(params, exprs, call, params);
591 parseerror(parser, "invalid function call");
595 /* overwrite fid, the function, with a call */
596 sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
598 if (fun->expression.vtype != TYPE_FUNCTION) {
599 parseerror(parser, "not a function");
603 if (!fun->expression.next) {
604 parseerror(parser, "could not determine function return type");
607 if (fun->expression.params_count != paramcount) {
608 parseerror(parser, "expected %i parameters, got %i", (int)fun->expression.params_count, paramcount);
616 static bool parser_close_paren(parser_t *parser, shunt *sy, bool functions_only)
618 if (!sy->ops_count) {
619 parseerror(parser, "unmatched closing paren");
622 if (sy->ops[sy->ops_count-1].paren == 1) {
623 parseerror(parser, "empty parenthesis expression");
626 while (sy->ops_count) {
627 if (sy->ops[sy->ops_count-1].paren == 'f') {
628 if (!parser_close_call(parser, sy))
632 if (sy->ops[sy->ops_count-1].paren == 1) {
634 return !functions_only;
636 if (!parser_sy_pop(parser, sy))
642 static ast_expression* parser_expression(parser_t *parser)
644 ast_expression *expr = NULL;
647 bool gotmemberof = false;
649 /* count the parens because an if starts with one, so the
650 * end of a condition is an unmatched closing paren
654 MEM_VECTOR_INIT(&sy, out);
655 MEM_VECTOR_INIT(&sy, ops);
662 parser->memberof = 0;
665 bool nextwant = true;
666 if (parser->tok == TOKEN_IDENT)
670 if (opts_standard == COMPILER_GMQCC)
672 if (parser->memberof == TYPE_ENTITY)
673 var = parser_find_field(parser, parser_tokval(parser));
674 else if (parser->memberof == TYPE_VECTOR)
676 parseerror(parser, "TODO: implement effective vector member access");
679 else if (parser->memberof) {
680 parseerror(parser, "namespace for member not found");
684 var = parser_find_var(parser, parser_tokval(parser));
686 var = parser_find_var(parser, parser_tokval(parser));
688 var = parser_find_field(parser, parser_tokval(parser));
691 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
694 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), var))) {
695 parseerror(parser, "out of memory");
698 DEBUGSHUNTDO(printf("push %s\n", parser_tokval(parser)));
700 else if (parser->tok == TOKEN_FLOATCONST) {
701 ast_value *val = parser_const_float(parser, (parser_token(parser)->constval.f));
704 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
705 parseerror(parser, "out of memory");
708 DEBUGSHUNTDO(printf("push %g\n", parser_token(parser)->constval.f));
710 else if (parser->tok == TOKEN_INTCONST) {
711 ast_value *val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
714 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
715 parseerror(parser, "out of memory");
718 DEBUGSHUNTDO(printf("push %i\n", parser_token(parser)->constval.i));
720 else if (parser->tok == TOKEN_STRINGCONST) {
721 ast_value *val = parser_const_string(parser, parser_tokval(parser));
724 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
725 parseerror(parser, "out of memory");
728 DEBUGSHUNTDO(printf("push string\n"));
730 else if (parser->tok == TOKEN_VECTORCONST) {
731 ast_value *val = parser_const_vector(parser, parser_token(parser)->constval.v);
734 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
735 parseerror(parser, "out of memory");
738 DEBUGSHUNTDO(printf("push '%g %g %g'\n",
739 parser_token(parser)->constval.v.x,
740 parser_token(parser)->constval.v.y,
741 parser_token(parser)->constval.v.z));
743 else if (parser->tok == '(') {
745 nextwant = false; /* not expecting an operator next */
746 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1, 0))) {
747 parseerror(parser, "out of memory");
750 DEBUGSHUNTDO(printf("push (\n"));
752 else if (parser->tok == ')') {
753 DEBUGSHUNTDO(printf("do[nop] )\n"));
757 /* allowed for function calls */
758 if (!parser_close_paren(parser, &sy, true))
762 /* TODO: prefix operators */
763 parseerror(parser, "expected statement");
767 parser->lex->flags.noops = !wantop;
769 bool nextwant = false;
770 if (parser->tok == '(') {
771 DEBUGSHUNTDO(printf("push (\n"));
773 /* we expected an operator, this is the function-call operator */
774 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f', sy.out_count-1))) {
775 parseerror(parser, "out of memory");
779 else if (parser->tok == ')') {
780 DEBUGSHUNTDO(printf("do[op] )\n"));
784 /* we do expect an operator next */
785 /* closing an opening paren */
786 if (!parser_close_paren(parser, &sy, false))
790 else if (parser->tok != TOKEN_OPERATOR) {
791 parseerror(parser, "expected operator or end of statement");
795 /* classify the operator */
796 /* TODO: suffix operators */
798 const oper_info *olast = NULL;
800 for (o = 0; o < operator_count; ++o) {
801 if (!(operators[o].flags & OP_PREFIX) &&
802 !(operators[o].flags & OP_SUFFIX) && /* remove this */
803 !strcmp(parser_tokval(parser), operators[o].op))
808 if (o == operator_count) {
809 /* no operator found... must be the end of the statement */
812 /* found an operator */
814 if (op->id == opid1('.')) {
815 /* for gmqcc standard: open up the namespace of the previous type */
816 ast_expression *prevex = sy.out[sy.out_count-1].out;
818 parseerror(parser, "unexpected member operator");
821 if (prevex->expression.vtype == TYPE_ENTITY)
822 parser->memberof = TYPE_ENTITY;
823 else if (prevex->expression.vtype == TYPE_VECTOR)
824 parser->memberof = TYPE_VECTOR;
826 parseerror(parser, "type error: type has no members");
832 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
833 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
836 (op->prec < olast->prec) ||
837 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
839 if (!parser_sy_pop(parser, &sy))
841 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
842 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
847 DEBUGSHUNTDO(printf("push operator %s\n", op->op));
848 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
852 parser->lex->flags.noops = !wantop;
854 if (!parser_next(parser)) {
857 if (parser->tok == ';') {
861 if (parens >= 0 && !parser_next(parser)) {
862 parseerror(parser, "Unexpected end of file");
866 while (sy.ops_count) {
867 if (!parser_sy_pop(parser, &sy))
871 parser->lex->flags.noops = true;
873 parseerror(parser, "empty expression");
876 expr = sy.out[0].out;
877 MEM_VECTOR_CLEAR(&sy, out);
878 MEM_VECTOR_CLEAR(&sy, ops);
879 DEBUGSHUNTDO(printf("shut done\n"));
883 parser->lex->flags.noops = true;
884 MEM_VECTOR_CLEAR(&sy, out);
885 MEM_VECTOR_CLEAR(&sy, ops);
889 static bool parser_variable(parser_t *parser, ast_block *localblock);
890 static ast_block* parser_parse_block(parser_t *parser);
891 static ast_expression* parser_parse_statement_or_block(parser_t *parser);
892 static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expression **out)
894 if (parser->tok == TOKEN_TYPENAME)
898 parseerror(parser, "cannot declare a variable from here");
901 if (!parser_variable(parser, block))
906 else if (parser->tok == TOKEN_KEYWORD)
908 if (!strcmp(parser_tokval(parser), "return"))
910 ast_expression *exp = NULL;
911 ast_return *ret = NULL;
912 ast_value *expected = parser->function->vtype;
914 if (!parser_next(parser)) {
915 parseerror(parser, "expected return expression");
919 if (parser->tok != ';') {
920 exp = parser_expression(parser);
924 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
925 parseerror(parser, "return with invalid expression");
928 ret = ast_return_new(exp->expression.node.context, exp);
934 *out = (ast_expression*)ret;
935 } else if (!parser_next(parser)) {
936 parseerror(parser, "expected semicolon");
937 if (expected->expression.next->expression.vtype != TYPE_VOID) {
938 parseerror(parser, "return without value");
943 else if (!strcmp(parser_tokval(parser), "if"))
946 ast_expression *cond, *ontrue, *onfalse = NULL;
948 lex_ctx ctx = parser_ctx(parser);
950 /* skip the 'if' and check for opening paren */
951 if (!parser_next(parser) || parser->tok != '(') {
952 parseerror(parser, "expected 'if' condition in parenthesis");
955 /* parse into the expression */
956 if (!parser_next(parser)) {
957 parseerror(parser, "expected 'if' condition after opening paren");
960 /* parse the condition */
961 cond = parser_expression(parser);
965 if (parser->tok != ')') {
966 parseerror(parser, "expected closing paren after 'if' condition");
970 /* parse into the 'then' branch */
971 if (!parser_next(parser)) {
972 parseerror(parser, "expected statement for on-true branch of 'if'");
976 ontrue = parser_parse_statement_or_block(parser);
981 /* check for an else */
982 if (!strcmp(parser_tokval(parser), "else")) {
983 /* parse into the 'else' branch */
984 if (!parser_next(parser)) {
985 parseerror(parser, "expected on-false branch after 'else'");
990 onfalse = parser_parse_statement_or_block(parser);
998 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
999 *out = (ast_expression*)ifthen;
1002 parseerror(parser, "Unexpected keyword");
1005 else if (parser->tok == '{')
1008 inner = parser_parse_block(parser);
1011 *out = (ast_expression*)inner;
1016 ast_expression *exp = parser_expression(parser);
1024 static void parser_pop_local(parser_t *parser)
1026 parser->locals_count--;
1027 mem_d(parser->locals[parser->locals_count].name);
1030 static ast_block* parser_parse_block(parser_t *parser)
1032 size_t oldblocklocal;
1033 ast_block *block = NULL;
1035 oldblocklocal = parser->blocklocal;
1036 parser->blocklocal = parser->locals_count;
1038 if (!parser_next(parser)) { /* skip the '{' */
1039 parseerror(parser, "expected function body");
1043 block = ast_block_new(parser_ctx(parser));
1045 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1047 ast_expression *expr;
1048 if (parser->tok == '}')
1051 if (!parser_parse_statement(parser, block, &expr)) {
1052 ast_block_delete(block);
1058 if (!ast_block_exprs_add(block, expr)) {
1060 ast_block_delete(block);
1066 if (parser->tok != '}') {
1067 ast_block_delete(block);
1070 (void)parser_next(parser);
1074 while (parser->locals_count > parser->blocklocal)
1075 parser_pop_local(parser);
1076 parser->blocklocal = oldblocklocal;
1077 /* unroll the local vector */
1081 static ast_expression* parser_parse_statement_or_block(parser_t *parser)
1083 ast_expression *expr;
1084 if (parser->tok == '{')
1085 return (ast_expression*)parser_parse_block(parser);
1086 if (!parser_parse_statement(parser, NULL, &expr))
1091 static bool parser_variable(parser_t *parser, ast_block *localblock)
1093 bool isfunc = false;
1094 ast_function *func = NULL;
1099 int basetype = parser_token(parser)->constval.t;
1103 if (!parser_next(parser)) { /* skip basetype or comma */
1104 parseerror(parser, "expected variable declaration");
1110 ctx = parser_ctx(parser);
1111 var = parser_parse_type(parser, basetype, &isfunc);
1116 if (parser->tok != TOKEN_IDENT) {
1117 parseerror(parser, "expected variable name\n");
1121 if (!localblock && parser_find_global(parser, parser_tokval(parser))) {
1122 ast_value_delete(var);
1123 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
1127 if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
1128 ast_value_delete(var);
1129 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
1133 if (!ast_value_set_name(var, parser_tokval(parser))) {
1134 parseerror(parser, "failed to set variable name\n");
1135 ast_value_delete(var);
1140 /* a function was defined */
1143 /* turn var into a value of TYPE_FUNCTION, with the old var
1146 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1147 func = ast_function_new(ctx, var->name, fval);
1148 if (!fval || !func) {
1149 ast_value_delete(var);
1150 if (fval) ast_value_delete(fval);
1151 if (func) ast_function_delete(func);
1155 fval->expression.next = (ast_expression*)var;
1156 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1158 if (!parser_t_functions_add(parser, func)) {
1159 ast_value_delete(var);
1160 if (fval) ast_value_delete(fval);
1161 if (func) ast_function_delete(func);
1168 varent.name = util_strdup(var->name);
1169 varent.var = (ast_expression*)var;
1170 if (var->expression.vtype == TYPE_VECTOR)
1172 size_t len = strlen(varent.name);
1173 varentry_t vx, vy, vz;
1174 vx.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 0);
1175 vy.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 1);
1176 vz.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 2);
1177 vx.name = mem_a(len+3);
1178 vy.name = mem_a(len+3);
1179 vz.name = mem_a(len+3);
1180 strcpy(vx.name, varent.name);
1181 strcpy(vy.name, varent.name);
1182 strcpy(vz.name, varent.name);
1183 vx.name[len] = vy.name[len] = vz.name[len] = '_';
1184 vx.name[len+1] = 'x';
1185 vy.name[len+1] = 'y';
1186 vz.name[len+1] = 'z';
1187 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
1190 (void)!parser_t_globals_add(parser, varent);
1191 (void)!parser_t_globals_add(parser, vx);
1192 (void)!parser_t_globals_add(parser, vy);
1193 (void)!parser_t_globals_add(parser, vz);
1195 (void)!parser_t_locals_add(parser, varent);
1196 (void)!parser_t_locals_add(parser, vx);
1197 (void)!parser_t_locals_add(parser, vy);
1198 (void)!parser_t_locals_add(parser, vz);
1203 if ( (!localblock && !parser_t_globals_add(parser, varent)) ||
1204 ( localblock && !parser_t_locals_add(parser, varent)) )
1206 ast_value_delete(var);
1210 if (localblock && !ast_block_locals_add(localblock, var))
1212 parser_pop_local(parser);
1213 ast_value_delete(var);
1217 if (!parser_next(parser)) {
1218 ast_value_delete(var);
1222 if (parser->tok == ';') {
1223 if (!parser_next(parser))
1224 return parser->tok == TOKEN_EOF;
1228 if (parser->tok == ',') {
1233 if (parser->tok != '=') {
1234 parseerror(parser, "expected '=' or ';'");
1238 if (!parser_next(parser))
1241 if (parser->tok == '#') {
1243 parseerror(parser, "cannot declare builtins within functions");
1246 if (!isfunc || !func) {
1247 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
1250 if (!parser_next(parser)) {
1251 parseerror(parser, "expected builtin number");
1254 if (parser->tok != TOKEN_INTCONST) {
1255 parseerror(parser, "builtin number must be an integer constant");
1258 if (parser_token(parser)->constval.i <= 0) {
1259 parseerror(parser, "builtin number must be positive integer greater than zero");
1263 func->builtin = -parser_token(parser)->constval.i;
1264 } else if (parser->tok == '{') {
1267 ast_function *old = parser->function;
1270 parseerror(parser, "cannot declare functions within functions");
1274 parser->function = func;
1275 block = parser_parse_block(parser);
1276 parser->function = old;
1281 if (!ast_function_blocks_add(func, block)) {
1282 ast_block_delete(block);
1287 parseerror(parser, "TODO, const assignment");
1290 if (!parser_next(parser))
1293 if (parser->tok == ',') {
1298 if (parser->tok != ';') {
1299 parseerror(parser, "expected semicolon");
1303 (void)parser_next(parser);
1309 static bool parser_do(parser_t *parser)
1311 if (parser->tok == TOKEN_TYPENAME)
1313 return parser_variable(parser, NULL);
1315 else if (parser->tok == TOKEN_KEYWORD)
1317 /* handle 'var' and 'const' */
1320 else if (parser->tok == '.')
1324 bool isfunc = false;
1326 lex_ctx ctx = parser_ctx(parser);
1329 /* entity-member declaration */
1330 if (!parser_next(parser) || parser->tok != TOKEN_TYPENAME) {
1331 parseerror(parser, "expected member variable definition");
1335 /* remember the base/return type */
1336 basetype = parser_token(parser)->constval.t;
1338 /* parse into the declaration */
1339 if (!parser_next(parser)) {
1340 parseerror(parser, "expected field def");
1344 /* parse the field type fully */
1345 var = parser_parse_type(parser, basetype, &isfunc);
1349 /* now the field name */
1350 if (parser->tok != TOKEN_IDENT) {
1351 parseerror(parser, "expected field name");
1356 /* check for an existing field
1357 * in original qc we also have to check for an existing
1358 * global named like the field
1360 if (opts_standard == COMPILER_QCC) {
1361 if (parser_find_global(parser, parser_tokval(parser))) {
1362 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
1367 if (parser_find_field(parser, parser_tokval(parser))) {
1368 parseerror(parser, "field %s already exists", parser_tokval(parser));
1373 /* if it was a function, turn it into a function */
1376 /* turn var into a value of TYPE_FUNCTION, with the old var
1379 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1381 ast_value_delete(var);
1382 ast_value_delete(fval);
1386 fval->expression.next = (ast_expression*)var;
1387 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1392 /* turn it into a field */
1393 fld = ast_value_new(ctx, parser_tokval(parser), TYPE_FIELD);
1394 fld->expression.next = (ast_expression*)var;
1396 varent.var = (ast_expression*)fld;
1397 if (var->expression.vtype == TYPE_VECTOR)
1399 /* create _x, _y and _z fields as well */
1400 parseerror(parser, "TODO: vector field members (_x,_y,_z)");
1405 varent.name = util_strdup(fld->name);
1406 (void)!parser_t_fields_add(parser, varent);
1408 /* end with a semicolon */
1409 if (!parser_next(parser) || parser->tok != ';') {
1410 parseerror(parser, "semicolon expected");
1414 /* skip the semicolon */
1415 if (!parser_next(parser))
1416 return parser->tok == TOKEN_EOF;
1422 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
1428 static parser_t *parser;
1432 parser = (parser_t*)mem_a(sizeof(parser_t));
1436 memset(parser, 0, sizeof(parser));
1438 MEM_VECTOR_INIT(parser, globals);
1439 MEM_VECTOR_INIT(parser, locals);
1443 bool parser_compile(const char *filename)
1445 parser->lex = lex_open(filename);
1447 printf("failed to open file \"%s\"\n", filename);
1451 /* initial lexer/parser state */
1452 parser->lex->flags.noops = true;
1454 if (parser_next(parser))
1456 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1458 if (!parser_do(parser)) {
1459 if (parser->tok == TOKEN_EOF)
1460 parseerror(parser, "unexpected eof");
1462 parseerror(parser, "parse error\n");
1463 lex_close(parser->lex);
1470 lex_close(parser->lex);
1472 return !parser->errors;
1475 void parser_cleanup()
1478 for (i = 0; i < parser->functions_count; ++i) {
1479 ast_delete(parser->functions[i]);
1481 for (i = 0; i < parser->imm_vector_count; ++i) {
1482 ast_delete(parser->imm_vector[i]);
1484 for (i = 0; i < parser->imm_string_count; ++i) {
1485 ast_delete(parser->imm_string[i]);
1487 for (i = 0; i < parser->imm_float_count; ++i) {
1488 ast_delete(parser->imm_float[i]);
1490 for (i = 0; i < parser->globals_count; ++i) {
1491 ast_delete(parser->globals[i].var);
1492 mem_d(parser->globals[i].name);
1494 MEM_VECTOR_CLEAR(parser, globals);
1499 bool parser_finish(const char *output)
1504 if (!parser->errors)
1506 ir = ir_builder_new("gmqcc_out");
1508 printf("failed to allocate builder\n");
1512 for (i = 0; i < parser->imm_float_count; ++i) {
1513 if (!ast_global_codegen(parser->imm_float[i], ir)) {
1514 printf("failed to generate global %s\n", parser->imm_float[i]->name);
1515 ir_builder_delete(ir);
1519 for (i = 0; i < parser->imm_string_count; ++i) {
1520 if (!ast_global_codegen(parser->imm_string[i], ir)) {
1521 printf("failed to generate global %s\n", parser->imm_string[i]->name);
1522 ir_builder_delete(ir);
1526 for (i = 0; i < parser->imm_vector_count; ++i) {
1527 if (!ast_global_codegen(parser->imm_vector[i], ir)) {
1528 printf("failed to generate global %s\n", parser->imm_vector[i]->name);
1529 ir_builder_delete(ir);
1533 for (i = 0; i < parser->fields_count; ++i) {
1536 if (!ast_istype(parser->fields[i].var, ast_value))
1538 field = (ast_value*)parser->fields[i].var;
1539 isconst = field->isconst;
1540 field->isconst = false;
1541 if (!ast_global_codegen((ast_value*)field, ir)) {
1542 printf("failed to generate field %s\n", field->name);
1543 ir_builder_delete(ir);
1548 ast_expression *subtype;
1549 field->isconst = true;
1550 subtype = field->expression.next;
1551 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
1552 if (subtype->expression.vtype == TYPE_FIELD)
1553 ifld->fieldtype = subtype->expression.next->expression.vtype;
1554 else if (subtype->expression.vtype == TYPE_FUNCTION)
1555 ifld->outtype = subtype->expression.next->expression.vtype;
1556 (void)!ir_value_set_field(field->ir_v, ifld);
1559 for (i = 0; i < parser->globals_count; ++i) {
1560 if (!ast_istype(parser->globals[i].var, ast_value))
1562 if (!ast_global_codegen((ast_value*)(parser->globals[i].var), ir)) {
1563 printf("failed to generate global %s\n", parser->globals[i].name);
1564 ir_builder_delete(ir);
1568 for (i = 0; i < parser->functions_count; ++i) {
1569 if (!ast_function_codegen(parser->functions[i], ir)) {
1570 printf("failed to generate function %s\n", parser->functions[i]->name);
1571 ir_builder_delete(ir);
1574 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
1575 printf("failed to finalize function %s\n", parser->functions[i]->name);
1576 ir_builder_delete(ir);
1581 ir_builder_dump(ir, printf);
1583 if (!ir_builder_generate(ir, output)) {
1584 printf("*** failed to generate output file\n");
1585 ir_builder_delete(ir);
1589 ir_builder_delete(ir);
1593 printf("*** there were compile errors\n");