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, "Cannot add type %s and %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, "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, "Cannot add 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, "Cannot multiply type %s from %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, "Cannot add type %s from %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, "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]);
506 if (ast_istype(exprs[0], ast_entfield))
507 assignop = type_storep_instr[exprs[0]->expression.vtype];
509 assignop = type_store_instr[exprs[0]->expression.vtype];
510 out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
515 parseerror(parser, "failed to apply operand %s", op->op);
519 DEBUGSHUNTDO(printf("applied %s\n", op->op));
520 sy->out[sy->out_count++] = syexp(ctx, out);
524 static bool parser_close_call(parser_t *parser, shunt *sy)
526 /* was a function call */
534 fid = sy->ops[sy->ops_count].off;
536 /* out[fid] is the function
537 * everything above is parameters...
539 * 1 params = ast_expression
543 if (sy->out_count < 1 || sy->out_count <= fid) {
544 parseerror(parser, "internal error: function call needs function and parameter list...");
548 fun = sy->out[fid].out;
550 call = ast_call_new(sy->ops[sy->ops_count].ctx, fun);
552 parseerror(parser, "out of memory");
556 if (fid+1 == sy->out_count) {
559 } else if (fid+2 == sy->out_count) {
562 params = sy->out[sy->out_count].block;
566 if (!ast_call_params_add(call, sy->out[sy->out_count].out)) {
567 ast_delete(sy->out[sy->out_count].out);
568 parseerror(parser, "out of memory");
572 paramcount = params->exprs_count;
573 MEM_VECTOR_MOVE(params, exprs, call, params);
577 parseerror(parser, "invalid function call");
581 /* overwrite fid, the function, with a call */
582 sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
584 if (fun->expression.vtype != TYPE_FUNCTION) {
585 parseerror(parser, "not a function");
589 if (!fun->expression.next) {
590 parseerror(parser, "could not determine function return type");
593 if (fun->expression.params_count != paramcount) {
594 parseerror(parser, "expected %i parameters, got %i", (int)fun->expression.params_count, paramcount);
602 static bool parser_close_paren(parser_t *parser, shunt *sy, bool functions_only)
604 if (!sy->ops_count) {
605 parseerror(parser, "unmatched closing paren");
608 if (sy->ops[sy->ops_count-1].paren == 1) {
609 parseerror(parser, "empty parenthesis expression");
612 while (sy->ops_count) {
613 if (sy->ops[sy->ops_count-1].paren == 'f') {
614 if (!parser_close_call(parser, sy))
618 if (sy->ops[sy->ops_count-1].paren == 1) {
620 return !functions_only;
622 if (!parser_sy_pop(parser, sy))
628 static ast_expression* parser_expression(parser_t *parser)
630 ast_expression *expr = NULL;
633 bool gotmemberof = false;
635 /* count the parens because an if starts with one, so the
636 * end of a condition is an unmatched closing paren
640 MEM_VECTOR_INIT(&sy, out);
641 MEM_VECTOR_INIT(&sy, ops);
648 parser->memberof = 0;
651 bool nextwant = true;
652 if (parser->tok == TOKEN_IDENT)
656 if (opts_standard == COMPILER_GMQCC)
658 if (parser->memberof == TYPE_ENTITY)
659 var = parser_find_field(parser, parser_tokval(parser));
660 else if (parser->memberof == TYPE_VECTOR)
662 parseerror(parser, "TODO: implement effective vector member access");
665 else if (parser->memberof) {
666 parseerror(parser, "namespace for member not found");
670 var = parser_find_var(parser, parser_tokval(parser));
672 var = parser_find_var(parser, parser_tokval(parser));
674 var = parser_find_field(parser, parser_tokval(parser));
677 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
680 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), var))) {
681 parseerror(parser, "out of memory");
684 DEBUGSHUNTDO(printf("push %s\n", parser_tokval(parser)));
686 else if (parser->tok == TOKEN_FLOATCONST) {
687 ast_value *val = parser_const_float(parser, (parser_token(parser)->constval.f));
690 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
691 parseerror(parser, "out of memory");
694 DEBUGSHUNTDO(printf("push %g\n", parser_token(parser)->constval.f));
696 else if (parser->tok == TOKEN_INTCONST) {
697 ast_value *val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
700 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
701 parseerror(parser, "out of memory");
704 DEBUGSHUNTDO(printf("push %i\n", parser_token(parser)->constval.i));
706 else if (parser->tok == TOKEN_STRINGCONST) {
707 ast_value *val = parser_const_string(parser, parser_tokval(parser));
710 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
711 parseerror(parser, "out of memory");
714 DEBUGSHUNTDO(printf("push string\n"));
716 else if (parser->tok == TOKEN_VECTORCONST) {
717 ast_value *val = parser_const_vector(parser, parser_token(parser)->constval.v);
720 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
721 parseerror(parser, "out of memory");
724 DEBUGSHUNTDO(printf("push '%g %g %g'\n",
725 parser_token(parser)->constval.v.x,
726 parser_token(parser)->constval.v.y,
727 parser_token(parser)->constval.v.z));
729 else if (parser->tok == '(') {
731 nextwant = false; /* not expecting an operator next */
732 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1, 0))) {
733 parseerror(parser, "out of memory");
736 DEBUGSHUNTDO(printf("push (\n"));
738 else if (parser->tok == ')') {
739 DEBUGSHUNTDO(printf("do[nop] )\n"));
743 /* allowed for function calls */
744 if (!parser_close_paren(parser, &sy, true))
748 /* TODO: prefix operators */
749 parseerror(parser, "expected statement");
753 parser->lex->flags.noops = !wantop;
755 bool nextwant = false;
756 if (parser->tok == '(') {
757 DEBUGSHUNTDO(printf("push (\n"));
759 /* we expected an operator, this is the function-call operator */
760 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f', sy.out_count-1))) {
761 parseerror(parser, "out of memory");
765 else if (parser->tok == ')') {
766 DEBUGSHUNTDO(printf("do[op] )\n"));
770 /* we do expect an operator next */
771 /* closing an opening paren */
772 if (!parser_close_paren(parser, &sy, false))
776 else if (parser->tok != TOKEN_OPERATOR) {
777 parseerror(parser, "expected operator or end of statement");
781 /* classify the operator */
782 /* TODO: suffix operators */
784 const oper_info *olast = NULL;
786 for (o = 0; o < operator_count; ++o) {
787 if (!(operators[o].flags & OP_PREFIX) &&
788 !(operators[o].flags & OP_SUFFIX) && /* remove this */
789 !strcmp(parser_tokval(parser), operators[o].op))
794 if (o == operator_count) {
795 /* no operator found... must be the end of the statement */
798 /* found an operator */
800 if (op->id == opid1('.')) {
801 /* for gmqcc standard: open up the namespace of the previous type */
802 ast_expression *prevex = sy.out[sy.out_count-1].out;
804 parseerror(parser, "unexpected member operator");
807 if (prevex->expression.vtype == TYPE_ENTITY)
808 parser->memberof = TYPE_ENTITY;
809 else if (prevex->expression.vtype == TYPE_VECTOR)
810 parser->memberof = TYPE_VECTOR;
812 parseerror(parser, "type error: type has no members");
818 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
819 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
822 (op->prec < olast->prec) ||
823 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
825 if (!parser_sy_pop(parser, &sy))
827 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
828 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
833 DEBUGSHUNTDO(printf("push operator %s\n", op->op));
834 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
838 parser->lex->flags.noops = !wantop;
840 if (!parser_next(parser)) {
843 if (parser->tok == ';') {
847 if (parens >= 0 && !parser_next(parser)) {
848 parseerror(parser, "Unexpected end of file");
852 while (sy.ops_count) {
853 if (!parser_sy_pop(parser, &sy))
857 parser->lex->flags.noops = true;
859 parseerror(parser, "empty expression");
862 expr = sy.out[0].out;
863 MEM_VECTOR_CLEAR(&sy, out);
864 MEM_VECTOR_CLEAR(&sy, ops);
865 DEBUGSHUNTDO(printf("shut done\n"));
869 parser->lex->flags.noops = true;
870 MEM_VECTOR_CLEAR(&sy, out);
871 MEM_VECTOR_CLEAR(&sy, ops);
875 static bool parser_variable(parser_t *parser, ast_block *localblock);
876 static ast_block* parser_parse_block(parser_t *parser);
877 static ast_expression* parser_parse_statement_or_block(parser_t *parser);
878 static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expression **out)
880 if (parser->tok == TOKEN_TYPENAME)
884 parseerror(parser, "cannot declare a variable from here");
887 if (!parser_variable(parser, block))
892 else if (parser->tok == TOKEN_KEYWORD)
894 if (!strcmp(parser_tokval(parser), "return"))
896 ast_expression *exp = NULL;
897 ast_return *ret = NULL;
898 ast_value *expected = parser->function->vtype;
900 if (!parser_next(parser)) {
901 parseerror(parser, "expected return expression");
905 if (parser->tok != ';') {
906 exp = parser_expression(parser);
910 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
911 parseerror(parser, "return with invalid expression");
914 ret = ast_return_new(exp->expression.node.context, exp);
920 *out = (ast_expression*)ret;
921 } else if (!parser_next(parser)) {
922 parseerror(parser, "expected semicolon");
923 if (expected->expression.next->expression.vtype != TYPE_VOID) {
924 parseerror(parser, "return without value");
929 else if (!strcmp(parser_tokval(parser), "if"))
932 ast_expression *cond, *ontrue, *onfalse = NULL;
934 lex_ctx ctx = parser_ctx(parser);
936 /* skip the 'if' and check for opening paren */
937 if (!parser_next(parser) || parser->tok != '(') {
938 parseerror(parser, "expected 'if' condition in parenthesis");
941 /* parse into the expression */
942 if (!parser_next(parser)) {
943 parseerror(parser, "expected 'if' condition after opening paren");
946 /* parse the condition */
947 cond = parser_expression(parser);
951 if (parser->tok != ')') {
952 parseerror(parser, "expected closing paren after 'if' condition");
956 /* parse into the 'then' branch */
957 if (!parser_next(parser)) {
958 parseerror(parser, "expected statement for on-true branch of 'if'");
962 ontrue = parser_parse_statement_or_block(parser);
967 /* check for an else */
968 if (!strcmp(parser_tokval(parser), "else")) {
969 /* parse into the 'else' branch */
970 if (!parser_next(parser)) {
971 parseerror(parser, "expected on-false branch after 'else'");
976 onfalse = parser_parse_statement_or_block(parser);
984 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
985 *out = (ast_expression*)ifthen;
988 parseerror(parser, "Unexpected keyword");
991 else if (parser->tok == '{')
994 inner = parser_parse_block(parser);
997 *out = (ast_expression*)inner;
1002 ast_expression *exp = parser_expression(parser);
1010 static void parser_pop_local(parser_t *parser)
1012 parser->locals_count--;
1013 mem_d(parser->locals[parser->locals_count].name);
1016 static ast_block* parser_parse_block(parser_t *parser)
1018 size_t oldblocklocal;
1019 ast_block *block = NULL;
1021 oldblocklocal = parser->blocklocal;
1022 parser->blocklocal = parser->locals_count;
1024 if (!parser_next(parser)) { /* skip the '{' */
1025 parseerror(parser, "expected function body");
1029 block = ast_block_new(parser_ctx(parser));
1031 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1033 ast_expression *expr;
1034 if (parser->tok == '}')
1037 if (!parser_parse_statement(parser, block, &expr)) {
1038 ast_block_delete(block);
1044 if (!ast_block_exprs_add(block, expr)) {
1046 ast_block_delete(block);
1052 if (parser->tok != '}') {
1053 ast_block_delete(block);
1056 (void)parser_next(parser);
1060 while (parser->locals_count > parser->blocklocal)
1061 parser_pop_local(parser);
1062 parser->blocklocal = oldblocklocal;
1063 /* unroll the local vector */
1067 static ast_expression* parser_parse_statement_or_block(parser_t *parser)
1069 ast_expression *expr;
1070 if (parser->tok == '{')
1071 return (ast_expression*)parser_parse_block(parser);
1072 if (!parser_parse_statement(parser, NULL, &expr))
1077 static bool parser_variable(parser_t *parser, ast_block *localblock)
1079 bool isfunc = false;
1080 ast_function *func = NULL;
1085 int basetype = parser_token(parser)->constval.t;
1089 if (!parser_next(parser)) { /* skip basetype or comma */
1090 parseerror(parser, "expected variable declaration");
1096 ctx = parser_ctx(parser);
1097 var = parser_parse_type(parser, basetype, &isfunc);
1102 if (parser->tok != TOKEN_IDENT) {
1103 parseerror(parser, "expected variable name\n");
1107 if (!localblock && parser_find_global(parser, parser_tokval(parser))) {
1108 ast_value_delete(var);
1109 parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
1113 if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
1114 ast_value_delete(var);
1115 parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
1119 if (!ast_value_set_name(var, parser_tokval(parser))) {
1120 parseerror(parser, "failed to set variable name\n");
1121 ast_value_delete(var);
1126 /* a function was defined */
1129 /* turn var into a value of TYPE_FUNCTION, with the old var
1132 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1133 func = ast_function_new(ctx, var->name, fval);
1134 if (!fval || !func) {
1135 ast_value_delete(var);
1136 if (fval) ast_value_delete(fval);
1137 if (func) ast_function_delete(func);
1141 fval->expression.next = (ast_expression*)var;
1142 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1144 if (!parser_t_functions_add(parser, func)) {
1145 ast_value_delete(var);
1146 if (fval) ast_value_delete(fval);
1147 if (func) ast_function_delete(func);
1154 varent.name = util_strdup(var->name);
1155 varent.var = (ast_expression*)var;
1156 if (var->expression.vtype == TYPE_VECTOR)
1158 size_t len = strlen(varent.name);
1159 varentry_t vx, vy, vz;
1160 vx.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 0);
1161 vy.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 1);
1162 vz.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 2);
1163 vx.name = mem_a(len+3);
1164 vy.name = mem_a(len+3);
1165 vz.name = mem_a(len+3);
1166 strcpy(vx.name, varent.name);
1167 strcpy(vy.name, varent.name);
1168 strcpy(vz.name, varent.name);
1169 vx.name[len] = vy.name[len] = vz.name[len] = '_';
1170 vx.name[len+1] = 'x';
1171 vy.name[len+1] = 'y';
1172 vz.name[len+1] = 'z';
1173 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
1176 (void)!parser_t_globals_add(parser, varent);
1177 (void)!parser_t_globals_add(parser, vx);
1178 (void)!parser_t_globals_add(parser, vy);
1179 (void)!parser_t_globals_add(parser, vz);
1181 (void)!parser_t_locals_add(parser, varent);
1182 (void)!parser_t_locals_add(parser, vx);
1183 (void)!parser_t_locals_add(parser, vy);
1184 (void)!parser_t_locals_add(parser, vz);
1189 if ( (!localblock && !parser_t_globals_add(parser, varent)) ||
1190 ( localblock && !parser_t_locals_add(parser, varent)) )
1192 ast_value_delete(var);
1196 if (localblock && !ast_block_locals_add(localblock, var))
1198 parser_pop_local(parser);
1199 ast_value_delete(var);
1203 if (!parser_next(parser)) {
1204 ast_value_delete(var);
1208 if (parser->tok == ';') {
1209 if (!parser_next(parser))
1210 return parser->tok == TOKEN_EOF;
1214 if (parser->tok == ',') {
1219 if (parser->tok != '=') {
1220 parseerror(parser, "expected '=' or ';'");
1224 if (!parser_next(parser))
1227 if (parser->tok == '#') {
1229 parseerror(parser, "cannot declare builtins within functions");
1232 if (!isfunc || !func) {
1233 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
1236 if (!parser_next(parser)) {
1237 parseerror(parser, "expected builtin number");
1240 if (parser->tok != TOKEN_INTCONST) {
1241 parseerror(parser, "builtin number must be an integer constant");
1244 if (parser_token(parser)->constval.i <= 0) {
1245 parseerror(parser, "builtin number must be positive integer greater than zero");
1249 func->builtin = -parser_token(parser)->constval.i;
1250 } else if (parser->tok == '{') {
1253 ast_function *old = parser->function;
1256 parseerror(parser, "cannot declare functions within functions");
1260 parser->function = func;
1261 block = parser_parse_block(parser);
1262 parser->function = old;
1267 if (!ast_function_blocks_add(func, block)) {
1268 ast_block_delete(block);
1273 parseerror(parser, "TODO, const assignment");
1276 if (!parser_next(parser))
1279 if (parser->tok == ',') {
1284 if (parser->tok != ';') {
1285 parseerror(parser, "expected semicolon");
1289 (void)parser_next(parser);
1295 static bool parser_do(parser_t *parser)
1297 if (parser->tok == TOKEN_TYPENAME)
1299 return parser_variable(parser, NULL);
1301 else if (parser->tok == TOKEN_KEYWORD)
1303 /* handle 'var' and 'const' */
1306 else if (parser->tok == '.')
1310 bool isfunc = false;
1312 lex_ctx ctx = parser_ctx(parser);
1315 /* entity-member declaration */
1316 if (!parser_next(parser) || parser->tok != TOKEN_TYPENAME) {
1317 parseerror(parser, "expected member variable definition");
1321 /* remember the base/return type */
1322 basetype = parser_token(parser)->constval.t;
1324 /* parse into the declaration */
1325 if (!parser_next(parser)) {
1326 parseerror(parser, "expected field def");
1330 /* parse the field type fully */
1331 var = parser_parse_type(parser, basetype, &isfunc);
1335 /* now the field name */
1336 if (parser->tok != TOKEN_IDENT) {
1337 parseerror(parser, "expected field name");
1342 /* check for an existing field
1343 * in original qc we also have to check for an existing
1344 * global named like the field
1346 if (opts_standard == COMPILER_QCC) {
1347 if (parser_find_global(parser, parser_tokval(parser))) {
1348 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
1353 if (parser_find_field(parser, parser_tokval(parser))) {
1354 parseerror(parser, "field %s already exists", parser_tokval(parser));
1359 /* if it was a function, turn it into a function */
1362 /* turn var into a value of TYPE_FUNCTION, with the old var
1365 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1367 ast_value_delete(var);
1368 ast_value_delete(fval);
1372 fval->expression.next = (ast_expression*)var;
1373 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1378 /* turn it into a field */
1379 fld = ast_value_new(ctx, parser_tokval(parser), TYPE_FIELD);
1380 fld->expression.next = (ast_expression*)var;
1382 varent.var = (ast_expression*)fld;
1383 if (var->expression.vtype == TYPE_VECTOR)
1385 /* create _x, _y and _z fields as well */
1386 parseerror(parser, "TODO: vector field members (_x,_y,_z)");
1391 varent.name = util_strdup(fld->name);
1392 (void)!parser_t_fields_add(parser, varent);
1394 /* end with a semicolon */
1395 if (!parser_next(parser) || parser->tok != ';') {
1396 parseerror(parser, "semicolon expected");
1400 /* skip the semicolon */
1401 if (!parser_next(parser))
1402 return parser->tok == TOKEN_EOF;
1408 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
1414 static parser_t *parser;
1418 parser = (parser_t*)mem_a(sizeof(parser_t));
1422 memset(parser, 0, sizeof(parser));
1424 MEM_VECTOR_INIT(parser, globals);
1425 MEM_VECTOR_INIT(parser, locals);
1429 bool parser_compile(const char *filename)
1431 parser->lex = lex_open(filename);
1433 printf("failed to open file \"%s\"\n", filename);
1437 /* initial lexer/parser state */
1438 parser->lex->flags.noops = true;
1440 if (parser_next(parser))
1442 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1444 if (!parser_do(parser)) {
1445 if (parser->tok == TOKEN_EOF)
1446 parseerror(parser, "unexpected eof");
1448 parseerror(parser, "parse error\n");
1449 lex_close(parser->lex);
1456 lex_close(parser->lex);
1458 return !parser->errors;
1461 void parser_cleanup()
1464 for (i = 0; i < parser->functions_count; ++i) {
1465 ast_delete(parser->functions[i]);
1467 for (i = 0; i < parser->imm_vector_count; ++i) {
1468 ast_delete(parser->imm_vector[i]);
1470 for (i = 0; i < parser->imm_string_count; ++i) {
1471 ast_delete(parser->imm_string[i]);
1473 for (i = 0; i < parser->imm_float_count; ++i) {
1474 ast_delete(parser->imm_float[i]);
1476 for (i = 0; i < parser->globals_count; ++i) {
1477 ast_delete(parser->globals[i].var);
1478 mem_d(parser->globals[i].name);
1480 MEM_VECTOR_CLEAR(parser, globals);
1485 bool parser_finish(const char *output)
1490 if (!parser->errors)
1492 ir = ir_builder_new("gmqcc_out");
1494 printf("failed to allocate builder\n");
1498 for (i = 0; i < parser->imm_float_count; ++i) {
1499 if (!ast_global_codegen(parser->imm_float[i], ir)) {
1500 printf("failed to generate global %s\n", parser->imm_float[i]->name);
1501 ir_builder_delete(ir);
1505 for (i = 0; i < parser->imm_string_count; ++i) {
1506 if (!ast_global_codegen(parser->imm_string[i], ir)) {
1507 printf("failed to generate global %s\n", parser->imm_string[i]->name);
1508 ir_builder_delete(ir);
1512 for (i = 0; i < parser->imm_vector_count; ++i) {
1513 if (!ast_global_codegen(parser->imm_vector[i], ir)) {
1514 printf("failed to generate global %s\n", parser->imm_vector[i]->name);
1515 ir_builder_delete(ir);
1519 for (i = 0; i < parser->fields_count; ++i) {
1522 if (!ast_istype(parser->fields[i].var, ast_value))
1524 field = (ast_value*)parser->fields[i].var;
1525 isconst = field->isconst;
1526 field->isconst = false;
1527 if (!ast_global_codegen((ast_value*)field, ir)) {
1528 printf("failed to generate field %s\n", field->name);
1529 ir_builder_delete(ir);
1534 ast_expression *subtype;
1535 field->isconst = true;
1536 subtype = field->expression.next;
1537 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
1538 if (subtype->expression.vtype == TYPE_FIELD)
1539 ifld->fieldtype = subtype->expression.next->expression.vtype;
1540 else if (subtype->expression.vtype == TYPE_FUNCTION)
1541 ifld->outtype = subtype->expression.next->expression.vtype;
1542 (void)!ir_value_set_field(field->ir_v, ifld);
1545 for (i = 0; i < parser->globals_count; ++i) {
1546 if (!ast_istype(parser->globals[i].var, ast_value))
1548 if (!ast_global_codegen((ast_value*)(parser->globals[i].var), ir)) {
1549 printf("failed to generate global %s\n", parser->globals[i].name);
1550 ir_builder_delete(ir);
1554 for (i = 0; i < parser->functions_count; ++i) {
1555 if (!ast_function_codegen(parser->functions[i], ir)) {
1556 printf("failed to generate function %s\n", parser->functions[i]->name);
1557 ir_builder_delete(ir);
1560 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
1561 printf("failed to finalize function %s\n", parser->functions[i]->name);
1562 ir_builder_delete(ir);
1567 ir_builder_dump(ir, printf);
1569 if (!ir_builder_generate(ir, output)) {
1570 printf("*** failed to generate output file\n");
1571 ir_builder_delete(ir);
1575 ir_builder_delete(ir);
1579 printf("*** there were compile errors\n");