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_value *imm_float_zero;
24 ast_value *imm_vector_zero;
26 ast_function *function;
27 MEM_VECTOR_MAKE(varentry_t, locals);
32 /* TYPE_FIELD -> parser_find_fields is used instead of find_var
33 * TODO: TYPE_VECTOR -> x, y and z are accepted in the gmqcc standard
34 * anything else: type error
39 MEM_VEC_FUNCTIONS(parser_t, varentry_t, globals)
40 MEM_VEC_FUNCTIONS(parser_t, varentry_t, fields)
41 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_float)
42 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_string)
43 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_vector)
44 MEM_VEC_FUNCTIONS(parser_t, varentry_t, locals)
45 MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
47 static void parser_pop_local(parser_t *parser);
48 static bool parser_variable(parser_t *parser, ast_block *localblock);
49 static ast_block* parser_parse_block(parser_t *parser);
50 static ast_expression* parser_parse_statement_or_block(parser_t *parser);
51 static ast_expression* parser_expression_leave(parser_t *parser, bool stopatcomma);
52 static ast_expression* parser_expression(parser_t *parser, bool stopatcomma);
54 void parseerror(parser_t *parser, const char *fmt, ...)
61 vprintmsg(LVL_ERROR, parser->lex->tok->ctx.file, parser->lex->tok->ctx.line, "parse error", fmt, ap);
67 /* returns true if it counts as an error */
68 bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *fmt, ...)
71 int lvl = LVL_WARNING;
73 if (!OPTS_WARN(warntype))
76 if (OPTS_WARN(WARN_ERROR)) {
82 vprintmsg(lvl, parser->lex->tok->ctx.file, parser->lex->tok->ctx.line, "warning", fmt, ap);
85 return OPTS_WARN(WARN_ERROR);
88 /**********************************************************************
89 * some maths used for constant folding
92 vector vec3_add(vector a, vector b)
101 vector vec3_sub(vector a, vector b)
110 qcfloat vec3_mulvv(vector a, vector b)
112 return (a.x * b.x + a.y * b.y + a.z * b.z);
115 vector vec3_mulvf(vector a, float b)
124 /**********************************************************************
128 bool parser_next(parser_t *parser)
130 /* lex_do kills the previous token */
131 parser->tok = lex_do(parser->lex);
132 if (parser->tok == TOKEN_EOF || parser->tok >= TOKEN_ERROR)
137 /* lift a token out of the parser so it's not destroyed by parser_next */
138 token *parser_lift(parser_t *parser)
140 token *tok = parser->lex->tok;
141 parser->lex->tok = NULL;
145 #define parser_tokval(p) (p->lex->tok->value)
146 #define parser_token(p) (p->lex->tok)
147 #define parser_ctx(p) (p->lex->tok->ctx)
149 ast_value* parser_const_float(parser_t *parser, double d)
153 for (i = 0; i < parser->imm_float_count; ++i) {
154 if (parser->imm_float[i]->constval.vfloat == d)
155 return parser->imm_float[i];
157 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
159 out->constval.vfloat = d;
160 if (!parser_t_imm_float_add(parser, out)) {
161 ast_value_delete(out);
167 ast_value* parser_const_float_0(parser_t *parser)
169 if (!parser->imm_float_zero)
170 parser->imm_float_zero = parser_const_float(parser, 0);
171 return parser->imm_float_zero;
174 ast_value* parser_const_string(parser_t *parser, const char *str)
178 for (i = 0; i < parser->imm_string_count; ++i) {
179 if (!strcmp(parser->imm_string[i]->constval.vstring, str))
180 return parser->imm_string[i];
182 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_STRING);
184 out->constval.vstring = util_strdup(str);
185 if (!parser_t_imm_string_add(parser, out)) {
186 ast_value_delete(out);
192 ast_value* parser_const_vector(parser_t *parser, vector v)
196 for (i = 0; i < parser->imm_vector_count; ++i) {
197 if (!memcmp(&parser->imm_vector[i]->constval.vvec, &v, sizeof(v)))
198 return parser->imm_vector[i];
200 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_VECTOR);
202 out->constval.vvec = v;
203 if (!parser_t_imm_vector_add(parser, out)) {
204 ast_value_delete(out);
210 ast_value* parser_const_vector_f(parser_t *parser, float x, float y, float z)
216 return parser_const_vector(parser, v);
219 ast_value* parser_const_vector_0(parser_t *parser)
221 if (!parser->imm_vector_zero)
222 parser->imm_vector_zero = parser_const_vector_f(parser, 0, 0, 0);
223 return parser->imm_vector_zero;
226 ast_expression* parser_find_field(parser_t *parser, const char *name)
229 for (i = 0; i < parser->fields_count; ++i) {
230 if (!strcmp(parser->fields[i].name, name))
231 return parser->fields[i].var;
236 ast_expression* parser_find_global(parser_t *parser, const char *name)
239 for (i = 0; i < parser->globals_count; ++i) {
240 if (!strcmp(parser->globals[i].name, name))
241 return parser->globals[i].var;
246 ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto)
250 for (i = parser->locals_count; i > upto;) {
252 if (!strcmp(parser->locals[i].name, name))
253 return parser->locals[i].var;
255 if (!parser->function)
257 fun = parser->function->vtype;
258 for (i = 0; i < fun->expression.params_count; ++i) {
259 if (!strcmp(fun->expression.params[i]->name, name))
260 return (ast_expression*)(fun->expression.params[i]);
265 ast_expression* parser_find_var(parser_t *parser, const char *name)
268 v = parser_find_local(parser, name, 0);
269 if (!v) v = parser_find_global(parser, name);
274 MEM_VECTOR_MAKE(ast_value*, p);
276 MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
278 static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
282 lex_ctx ctx = parser_ctx(parser);
283 int vtype = basetype;
287 MEM_VECTOR_INIT(¶ms, p);
291 if (parser->tok == '(') {
296 bool isfield = false;
299 if (!parser_next(parser))
302 if (parser->tok == ')')
305 if (parser->tok == '.') {
307 if (!parser_next(parser)) {
308 parseerror(parser, "expected field parameter type");
313 temptype = parser_token(parser)->constval.t;
314 if (!parser_next(parser))
317 param = parser_parse_type(parser, temptype, &dummy);
323 if (parser->tok == TOKEN_IDENT) {
324 /* named parameter */
325 if (!ast_value_set_name(param, parser_tokval(parser)))
327 if (!parser_next(parser))
332 fld = ast_value_new(ctx, param->name, TYPE_FIELD);
333 fld->expression.next = (ast_expression*)param;
337 if (!paramlist_t_p_add(¶ms, param)) {
338 parseerror(parser, "Out of memory while parsing typename");
342 if (parser->tok == ',')
344 if (parser->tok == ')')
346 parseerror(parser, "Unexpected token");
349 if (!parser_next(parser))
353 var = ast_value_new(ctx, "<unnamed>", vtype);
356 MEM_VECTOR_MOVE(¶ms, p, &var->expression, params);
359 for (i = 0; i < params.p_count; ++i)
360 ast_value_delete(params.p[i]);
361 MEM_VECTOR_CLEAR(¶ms, p);
367 size_t etype; /* 0 = expression, others are operators */
371 ast_block *block; /* for commas and function calls */
376 MEM_VECTOR_MAKE(sy_elem, out);
377 MEM_VECTOR_MAKE(sy_elem, ops);
379 MEM_VEC_FUNCTIONS(shunt, sy_elem, out)
380 MEM_VEC_FUNCTIONS(shunt, sy_elem, ops)
382 static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
392 static sy_elem syblock(lex_ctx ctx, ast_block *v) {
395 e.out = (ast_expression*)v;
402 static sy_elem syop(lex_ctx ctx, const oper_info *op) {
404 e.etype = 1 + (op - operators);
412 static sy_elem syparen(lex_ctx ctx, int p, size_t off) {
424 # define DEBUGSHUNTDO(x) x
426 # define DEBUGSHUNTDO(x)
429 static bool parser_sy_pop(parser_t *parser, shunt *sy)
433 ast_expression *out = NULL;
434 ast_expression *exprs[3];
435 ast_block *blocks[3];
436 ast_value *asvalue[3];
438 qcint generated_op = 0;
440 if (!sy->ops_count) {
441 parseerror(parser, "internal error: missing operator");
445 if (sy->ops[sy->ops_count-1].paren) {
446 parseerror(parser, "unmatched parenthesis");
450 op = &operators[sy->ops[sy->ops_count-1].etype - 1];
451 ctx = sy->ops[sy->ops_count-1].ctx;
453 DEBUGSHUNTDO(printf("apply %s\n", op->op));
455 if (sy->out_count < op->operands) {
456 parseerror(parser, "internal error: not enough operands: %i (operator %s (%i))", sy->out_count,
457 op->op, (int)op->id);
463 sy->out_count -= op->operands;
464 for (i = 0; i < op->operands; ++i) {
465 exprs[i] = sy->out[sy->out_count+i].out;
466 blocks[i] = sy->out[sy->out_count+i].block;
467 asvalue[i] = (ast_value*)exprs[i];
470 if (blocks[0] && !blocks[0]->exprs_count && op->id != opid1(',')) {
471 parseerror(parser, "internal error: operator cannot be applied on empty blocks");
475 #define NotSameType(T) \
476 (exprs[0]->expression.vtype != exprs[1]->expression.vtype || \
477 exprs[0]->expression.vtype != T)
478 #define CanConstFold1(A) \
479 (ast_istype((A), ast_value) && ((ast_value*)(A))->isconst)
480 #define CanConstFold(A, B) \
481 (CanConstFold1(A) && CanConstFold1(B))
482 #define ConstV(i) (asvalue[(i)]->constval.vvec)
483 #define ConstF(i) (asvalue[(i)]->constval.vfloat)
487 parseerror(parser, "internal error: unhandled operator: %s (%i)", op->op, (int)op->id);
491 if (exprs[0]->expression.vtype == TYPE_ENTITY) {
492 if (exprs[1]->expression.vtype != TYPE_FIELD) {
493 parseerror(parser, "type error: right hand of member-operand should be an entity-field");
496 out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
498 else if (exprs[0]->expression.vtype == TYPE_VECTOR) {
499 parseerror(parser, "internal error: vector access is not supposed to be handled at this point");
503 parseerror(parser, "type error: member-of operator on something that is not an entity or vector");
510 if (!ast_block_exprs_add(blocks[0], exprs[1]))
513 blocks[0] = ast_block_new(ctx);
514 if (!ast_block_exprs_add(blocks[0], exprs[0]) ||
515 !ast_block_exprs_add(blocks[0], exprs[1]))
520 if (!ast_block_set_type(blocks[0], exprs[1]))
523 sy->out[sy->out_count++] = syblock(ctx, blocks[0]);
527 switch (exprs[0]->expression.vtype) {
529 if (CanConstFold1(exprs[0]))
530 out = (ast_expression*)parser_const_float(parser, -ConstF(0));
532 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F,
533 (ast_expression*)parser_const_float_0(parser),
537 if (CanConstFold1(exprs[0]))
538 out = (ast_expression*)parser_const_vector_f(parser,
539 -ConstV(0).x, -ConstV(0).y, -ConstV(0).z);
541 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V,
542 (ast_expression*)parser_const_vector_0(parser),
546 parseerror(parser, "invalid types used in expression: cannot negate type %s",
547 type_name[exprs[0]->expression.vtype]);
553 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
554 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
556 parseerror(parser, "invalid types used in expression: cannot add type %s and %s",
557 type_name[exprs[0]->expression.vtype],
558 type_name[exprs[1]->expression.vtype]);
561 switch (exprs[0]->expression.vtype) {
563 if (CanConstFold(exprs[0], exprs[1]))
565 out = (ast_expression*)parser_const_float(parser, ConstF(0) + ConstF(1));
568 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
571 if (CanConstFold(exprs[0], exprs[1]))
572 out = (ast_expression*)parser_const_vector(parser, vec3_add(ConstV(0), ConstV(1)));
574 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
577 parseerror(parser, "invalid types used in expression: cannot add type %s and %s",
578 type_name[exprs[0]->expression.vtype],
579 type_name[exprs[1]->expression.vtype]);
584 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
585 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
587 parseerror(parser, "invalid types used in expression: cannot subtract type %s from %s",
588 type_name[exprs[1]->expression.vtype],
589 type_name[exprs[0]->expression.vtype]);
592 switch (exprs[0]->expression.vtype) {
594 if (CanConstFold(exprs[0], exprs[1]))
595 out = (ast_expression*)parser_const_float(parser, ConstF(0) - ConstF(1));
597 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
600 if (CanConstFold(exprs[0], exprs[1]))
601 out = (ast_expression*)parser_const_vector(parser, vec3_sub(ConstV(0), ConstV(1)));
603 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
606 parseerror(parser, "invalid types used in expression: cannot subtract type %s from %s",
607 type_name[exprs[1]->expression.vtype],
608 type_name[exprs[0]->expression.vtype]);
613 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
614 exprs[0]->expression.vtype != TYPE_VECTOR &&
615 exprs[0]->expression.vtype != TYPE_FLOAT &&
616 exprs[1]->expression.vtype != TYPE_VECTOR &&
617 exprs[1]->expression.vtype != TYPE_FLOAT)
619 parseerror(parser, "invalid types used in expression: cannot multiply types %s and %s",
620 type_name[exprs[1]->expression.vtype],
621 type_name[exprs[0]->expression.vtype]);
624 switch (exprs[0]->expression.vtype) {
626 if (exprs[1]->expression.vtype == TYPE_VECTOR)
628 if (CanConstFold(exprs[0], exprs[1]))
629 out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(1), ConstF(0)));
631 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
635 if (CanConstFold(exprs[0], exprs[1]))
636 out = (ast_expression*)parser_const_float(parser, ConstF(0) * ConstF(1));
638 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
642 if (exprs[1]->expression.vtype == TYPE_FLOAT)
644 if (CanConstFold(exprs[0], exprs[1]))
645 out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(0), ConstF(1)));
647 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
651 if (CanConstFold(exprs[0], exprs[1]))
652 out = (ast_expression*)parser_const_float(parser, vec3_mulvv(ConstV(0), ConstV(1)));
654 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
658 parseerror(parser, "invalid types used in expression: cannot multiply types %s and %s",
659 type_name[exprs[1]->expression.vtype],
660 type_name[exprs[0]->expression.vtype]);
665 if (NotSameType(TYPE_FLOAT)) {
666 parseerror(parser, "invalid types used in expression: cannot divide types %s and %s",
667 type_name[exprs[0]->expression.vtype],
668 type_name[exprs[1]->expression.vtype]);
671 if (CanConstFold(exprs[0], exprs[1]))
672 out = (ast_expression*)parser_const_float(parser, ConstF(0) / ConstF(1));
674 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
678 parseerror(parser, "qc does not have a modulo operator");
682 if (NotSameType(TYPE_FLOAT)) {
683 parseerror(parser, "invalid types used in expression: cannot perform bit operations between types %s and %s",
684 type_name[exprs[0]->expression.vtype],
685 type_name[exprs[1]->expression.vtype]);
688 if (CanConstFold(exprs[0], exprs[1]))
689 out = (ast_expression*)parser_const_float(parser,
690 (op->id == opid1('|') ? (float)( ((qcint)ConstF(0)) | ((qcint)ConstF(1)) ) :
691 (float)( ((qcint)ConstF(0)) & ((qcint)ConstF(1)) ) ));
693 out = (ast_expression*)ast_binary_new(ctx,
694 (op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
698 parseerror(parser, "TODO: bitxor");
703 case opid3('<','<','='):
704 case opid3('>','>','='):
705 parseerror(parser, "TODO: shifts");
709 generated_op += 1; /* INSTR_OR */
711 generated_op += INSTR_AND;
712 if (NotSameType(TYPE_FLOAT)) {
713 parseerror(parser, "invalid types used in expression: cannot perform logical operations between types %s and %s",
714 type_name[exprs[0]->expression.vtype],
715 type_name[exprs[1]->expression.vtype]);
716 parseerror(parser, "TODO: logical ops for arbitrary types using INSTR_NOT");
717 parseerror(parser, "TODO: optional early out");
720 if (opts_standard == COMPILER_GMQCC)
721 printf("TODO: early out logic\n");
722 if (CanConstFold(exprs[0], exprs[1]))
723 out = (ast_expression*)parser_const_float(parser,
724 (generated_op == INSTR_OR ? (ConstF(0) || ConstF(1)) : (ConstF(0) && ConstF(1))));
726 out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
730 generated_op += 1; /* INSTR_GT */
732 generated_op += 1; /* INSTR_LT */
733 case opid2('>', '='):
734 generated_op += 1; /* INSTR_GE */
735 case opid2('<', '='):
736 generated_op += INSTR_LE;
737 if (NotSameType(TYPE_FLOAT)) {
738 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
739 type_name[exprs[0]->expression.vtype],
740 type_name[exprs[1]->expression.vtype]);
743 out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
745 case opid2('!', '='):
746 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
747 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
748 type_name[exprs[0]->expression.vtype],
749 type_name[exprs[1]->expression.vtype]);
752 out = (ast_expression*)ast_binary_new(ctx, type_ne_instr[exprs[0]->expression.vtype], exprs[0], exprs[1]);
754 case opid2('=', '='):
755 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
756 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
757 type_name[exprs[0]->expression.vtype],
758 type_name[exprs[1]->expression.vtype]);
761 out = (ast_expression*)ast_binary_new(ctx, type_eq_instr[exprs[0]->expression.vtype], exprs[0], exprs[1]);
765 if (ast_istype(exprs[0], ast_entfield))
766 assignop = type_storep_instr[exprs[0]->expression.vtype];
768 assignop = type_store_instr[exprs[0]->expression.vtype];
769 out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
773 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
774 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
776 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
777 type_name[exprs[0]->expression.vtype],
778 type_name[exprs[1]->expression.vtype]);
781 if (ast_istype(exprs[0], ast_entfield))
782 assignop = type_storep_instr[exprs[0]->expression.vtype];
784 assignop = type_store_instr[exprs[0]->expression.vtype];
785 switch (exprs[0]->expression.vtype) {
787 out = (ast_expression*)ast_binstore_new(ctx, assignop,
788 (op->id == opid2('+','=') ? INSTR_ADD_F : INSTR_SUB_F),
792 out = (ast_expression*)ast_binstore_new(ctx, assignop,
793 (op->id == opid2('+','=') ? INSTR_ADD_V : INSTR_SUB_V),
797 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
798 type_name[exprs[0]->expression.vtype],
799 type_name[exprs[1]->expression.vtype]);
807 parseerror(parser, "failed to apply operand %s", op->op);
811 DEBUGSHUNTDO(printf("applied %s\n", op->op));
812 sy->out[sy->out_count++] = syexp(ctx, out);
816 static bool parser_close_call(parser_t *parser, shunt *sy)
818 /* was a function call */
826 fid = sy->ops[sy->ops_count].off;
828 /* out[fid] is the function
829 * everything above is parameters...
831 * 1 params = ast_expression
835 if (sy->out_count < 1 || sy->out_count <= fid) {
836 parseerror(parser, "internal error: function call needs function and parameter list...");
840 fun = sy->out[fid].out;
842 call = ast_call_new(sy->ops[sy->ops_count].ctx, fun);
844 parseerror(parser, "out of memory");
848 if (fid+1 == sy->out_count) {
851 } else if (fid+2 == sy->out_count) {
854 params = sy->out[sy->out_count].block;
858 if (!ast_call_params_add(call, sy->out[sy->out_count].out)) {
859 ast_delete(sy->out[sy->out_count].out);
860 parseerror(parser, "out of memory");
864 paramcount = params->exprs_count;
865 MEM_VECTOR_MOVE(params, exprs, call, params);
869 parseerror(parser, "invalid function call");
873 /* overwrite fid, the function, with a call */
874 sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
876 if (fun->expression.vtype != TYPE_FUNCTION) {
877 parseerror(parser, "not a function");
881 if (!fun->expression.next) {
882 parseerror(parser, "could not determine function return type");
885 if (fun->expression.params_count != paramcount) {
886 parseerror(parser, "expected %i parameters, got %i", (int)fun->expression.params_count, paramcount);
894 static bool parser_close_paren(parser_t *parser, shunt *sy, bool functions_only)
896 if (!sy->ops_count) {
897 parseerror(parser, "unmatched closing paren");
900 if (sy->ops[sy->ops_count-1].paren == 1) {
901 parseerror(parser, "empty parenthesis expression");
904 while (sy->ops_count) {
905 if (sy->ops[sy->ops_count-1].paren == 'f') {
906 if (!parser_close_call(parser, sy))
910 if (sy->ops[sy->ops_count-1].paren == 1) {
912 return !functions_only;
914 if (!parser_sy_pop(parser, sy))
920 static void parser_reclassify_token(parser_t *parser)
923 for (i = 0; i < operator_count; ++i) {
924 if (!strcmp(parser_tokval(parser), operators[i].op)) {
925 parser->tok = TOKEN_OPERATOR;
931 static ast_expression* parser_expression_leave(parser_t *parser, bool stopatcomma)
933 ast_expression *expr = NULL;
936 bool gotmemberof = false;
938 /* count the parens because an if starts with one, so the
939 * end of a condition is an unmatched closing paren
943 MEM_VECTOR_INIT(&sy, out);
944 MEM_VECTOR_INIT(&sy, ops);
946 parser->lex->flags.noops = false;
948 parser_reclassify_token(parser);
955 parser->memberof = 0;
957 if (parser->tok == TOKEN_IDENT)
961 parseerror(parser, "expected operator or end of statement");
966 if (opts_standard == COMPILER_GMQCC)
968 if (parser->memberof == TYPE_ENTITY)
969 var = parser_find_field(parser, parser_tokval(parser));
970 else if (parser->memberof == TYPE_VECTOR)
972 parseerror(parser, "TODO: implement effective vector member access");
975 else if (parser->memberof) {
976 parseerror(parser, "namespace for member not found");
980 var = parser_find_var(parser, parser_tokval(parser));
982 var = parser_find_var(parser, parser_tokval(parser));
984 var = parser_find_field(parser, parser_tokval(parser));
987 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
990 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), var))) {
991 parseerror(parser, "out of memory");
994 DEBUGSHUNTDO(printf("push %s\n", parser_tokval(parser)));
996 else if (parser->tok == TOKEN_FLOATCONST) {
999 parseerror(parser, "expected operator or end of statement, got constant");
1003 val = parser_const_float(parser, (parser_token(parser)->constval.f));
1006 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1007 parseerror(parser, "out of memory");
1010 DEBUGSHUNTDO(printf("push %g\n", parser_token(parser)->constval.f));
1012 else if (parser->tok == TOKEN_INTCONST) {
1015 parseerror(parser, "expected operator or end of statement, got constant");
1019 val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
1022 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1023 parseerror(parser, "out of memory");
1026 DEBUGSHUNTDO(printf("push %i\n", parser_token(parser)->constval.i));
1028 else if (parser->tok == TOKEN_STRINGCONST) {
1031 parseerror(parser, "expected operator or end of statement, got constant");
1035 val = parser_const_string(parser, parser_tokval(parser));
1038 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1039 parseerror(parser, "out of memory");
1042 DEBUGSHUNTDO(printf("push string\n"));
1044 else if (parser->tok == TOKEN_VECTORCONST) {
1047 parseerror(parser, "expected operator or end of statement, got constant");
1051 val = parser_const_vector(parser, parser_token(parser)->constval.v);
1054 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1055 parseerror(parser, "out of memory");
1058 DEBUGSHUNTDO(printf("push '%g %g %g'\n",
1059 parser_token(parser)->constval.v.x,
1060 parser_token(parser)->constval.v.y,
1061 parser_token(parser)->constval.v.z));
1063 else if (parser->tok == '(') {
1065 DEBUGSHUNTDO(printf("push (\n"));
1067 /* we expected an operator, this is the function-call operator */
1068 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f', sy.out_count-1))) {
1069 parseerror(parser, "out of memory");
1074 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1, 0))) {
1075 parseerror(parser, "out of memory");
1078 DEBUGSHUNTDO(printf("push (\n"));
1082 else if (parser->tok == ')') {
1084 DEBUGSHUNTDO(printf("do[op] )\n"));
1088 /* we do expect an operator next */
1089 /* closing an opening paren */
1090 if (!parser_close_paren(parser, &sy, false))
1093 DEBUGSHUNTDO(printf("do[nop] )\n"));
1097 /* allowed for function calls */
1098 if (!parser_close_paren(parser, &sy, true))
1103 else if (parser->tok != TOKEN_OPERATOR) {
1105 parseerror(parser, "expected operator or end of statement");
1112 /* classify the operator */
1113 /* TODO: suffix operators */
1114 const oper_info *op;
1115 const oper_info *olast = NULL;
1117 for (o = 0; o < operator_count; ++o) {
1118 if ((!(operators[o].flags & OP_PREFIX) == wantop) &&
1119 !(operators[o].flags & OP_SUFFIX) && /* remove this */
1120 !strcmp(parser_tokval(parser), operators[o].op))
1126 if (o == operator_count) {
1127 /* no operator found... must be the end of the statement */
1130 /* found an operator */
1133 /* when declaring variables, a comma starts a new variable */
1134 if (op->id == opid1(',') && !parens && stopatcomma)
1137 if (op->id == opid1('.')) {
1138 /* for gmqcc standard: open up the namespace of the previous type */
1139 ast_expression *prevex = sy.out[sy.out_count-1].out;
1141 parseerror(parser, "unexpected member operator");
1144 if (prevex->expression.vtype == TYPE_ENTITY)
1145 parser->memberof = TYPE_ENTITY;
1146 else if (prevex->expression.vtype == TYPE_VECTOR)
1147 parser->memberof = TYPE_VECTOR;
1149 parseerror(parser, "type error: type has no members");
1155 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
1156 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
1159 (op->prec < olast->prec) ||
1160 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
1162 if (!parser_sy_pop(parser, &sy))
1164 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
1165 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
1170 DEBUGSHUNTDO(printf("push operator %s\n", op->op));
1171 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
1174 if (!parser_next(parser)) {
1177 if (parser->tok == ';') {
1182 while (sy.ops_count) {
1183 if (!parser_sy_pop(parser, &sy))
1187 parser->lex->flags.noops = true;
1188 if (!sy.out_count) {
1189 parseerror(parser, "empty expression");
1192 expr = sy.out[0].out;
1193 MEM_VECTOR_CLEAR(&sy, out);
1194 MEM_VECTOR_CLEAR(&sy, ops);
1195 DEBUGSHUNTDO(printf("shunt done\n"));
1199 parser->lex->flags.noops = true;
1200 MEM_VECTOR_CLEAR(&sy, out);
1201 MEM_VECTOR_CLEAR(&sy, ops);
1205 static ast_expression* parser_expression(parser_t *parser, bool stopatcomma)
1207 ast_expression *e = parser_expression_leave(parser, stopatcomma);
1210 if (!parser_next(parser)) {
1217 static bool parser_parse_if(parser_t *parser, ast_block *block, ast_expression **out)
1220 ast_expression *cond, *ontrue, *onfalse = NULL;
1222 lex_ctx ctx = parser_ctx(parser);
1224 /* skip the 'if' and check for opening paren */
1225 if (!parser_next(parser) || parser->tok != '(') {
1226 parseerror(parser, "expected 'if' condition in parenthesis");
1229 /* parse into the expression */
1230 if (!parser_next(parser)) {
1231 parseerror(parser, "expected 'if' condition after opening paren");
1234 /* parse the condition */
1235 cond = parser_expression_leave(parser, false);
1239 if (parser->tok != ')') {
1240 parseerror(parser, "expected closing paren after 'if' condition");
1244 /* parse into the 'then' branch */
1245 if (!parser_next(parser)) {
1246 parseerror(parser, "expected statement for on-true branch of 'if'");
1250 ontrue = parser_parse_statement_or_block(parser);
1255 /* check for an else */
1256 if (!strcmp(parser_tokval(parser), "else")) {
1257 /* parse into the 'else' branch */
1258 if (!parser_next(parser)) {
1259 parseerror(parser, "expected on-false branch after 'else'");
1264 onfalse = parser_parse_statement_or_block(parser);
1272 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
1273 *out = (ast_expression*)ifthen;
1277 static bool parser_parse_while(parser_t *parser, ast_block *block, ast_expression **out)
1280 ast_expression *cond, *ontrue;
1282 lex_ctx ctx = parser_ctx(parser);
1284 /* skip the 'while' and check for opening paren */
1285 if (!parser_next(parser) || parser->tok != '(') {
1286 parseerror(parser, "expected 'while' condition in parenthesis");
1289 /* parse into the expression */
1290 if (!parser_next(parser)) {
1291 parseerror(parser, "expected 'while' condition after opening paren");
1294 /* parse the condition */
1295 cond = parser_expression_leave(parser, false);
1299 if (parser->tok != ')') {
1300 parseerror(parser, "expected closing paren after 'while' condition");
1304 /* parse into the 'then' branch */
1305 if (!parser_next(parser)) {
1306 parseerror(parser, "expected while-loop body");
1310 ontrue = parser_parse_statement_or_block(parser);
1316 aloop = ast_loop_new(ctx, NULL, cond, NULL, NULL, ontrue);
1317 *out = (ast_expression*)aloop;
1321 static bool parser_parse_dowhile(parser_t *parser, ast_block *block, ast_expression **out)
1324 ast_expression *cond, *ontrue;
1326 lex_ctx ctx = parser_ctx(parser);
1328 /* skip the 'do' and get the body */
1329 if (!parser_next(parser)) {
1330 parseerror(parser, "expected loop body");
1333 ontrue = parser_parse_statement_or_block(parser);
1337 /* expect the "while" */
1338 if (parser->tok != TOKEN_KEYWORD ||
1339 strcmp(parser_tokval(parser), "while"))
1341 parseerror(parser, "expected 'while' and condition");
1346 /* skip the 'while' and check for opening paren */
1347 if (!parser_next(parser) || parser->tok != '(') {
1348 parseerror(parser, "expected 'while' condition in parenthesis");
1352 /* parse into the expression */
1353 if (!parser_next(parser)) {
1354 parseerror(parser, "expected 'while' condition after opening paren");
1358 /* parse the condition */
1359 cond = parser_expression_leave(parser, false);
1363 if (parser->tok != ')') {
1364 parseerror(parser, "expected closing paren after 'while' condition");
1370 if (!parser_next(parser) || parser->tok != ';') {
1371 parseerror(parser, "expected semicolon after condition");
1377 if (!parser_next(parser)) {
1378 parseerror(parser, "parse error");
1384 aloop = ast_loop_new(ctx, NULL, NULL, cond, NULL, ontrue);
1385 *out = (ast_expression*)aloop;
1389 static bool parser_parse_for(parser_t *parser, ast_block *block, ast_expression **out)
1392 ast_expression *initexpr, *cond, *increment, *ontrue;
1393 size_t oldblocklocal;
1395 lex_ctx ctx = parser_ctx(parser);
1397 oldblocklocal = parser->blocklocal;
1398 parser->blocklocal = parser->locals_count;
1405 /* skip the 'while' and check for opening paren */
1406 if (!parser_next(parser) || parser->tok != '(') {
1407 parseerror(parser, "expected 'for' expressions in parenthesis");
1410 /* parse into the expression */
1411 if (!parser_next(parser)) {
1412 parseerror(parser, "expected 'for' initializer after opening paren");
1416 if (parser->tok == TOKEN_TYPENAME) {
1417 if (opts_standard != COMPILER_GMQCC) {
1418 if (parsewarning(parser, WARN_EXTENSIONS,
1419 "current standard does not allow variable declarations in for-loop initializers"))
1423 parseerror(parser, "TODO: assignment of new variables to be non-const");
1425 if (!parser_variable(parser, block))
1428 else if (parser->tok != ';')
1430 initexpr = parser_expression_leave(parser, false);
1435 /* move on to condition */
1436 if (parser->tok != ';') {
1437 parseerror(parser, "expected semicolon after for-loop initializer");
1440 if (!parser_next(parser)) {
1441 parseerror(parser, "expected for-loop condition");
1445 /* parse the condition */
1446 if (parser->tok != ';') {
1447 cond = parser_expression_leave(parser, false);
1452 /* move on to incrementor */
1453 if (parser->tok != ';') {
1454 parseerror(parser, "expected semicolon after for-loop initializer");
1457 if (!parser_next(parser)) {
1458 parseerror(parser, "expected for-loop condition");
1462 /* parse the incrementor */
1463 if (parser->tok != ')') {
1464 increment = parser_expression_leave(parser, false);
1470 if (parser->tok != ')') {
1471 parseerror(parser, "expected closing paren after 'for-loop' incrementor");
1474 /* parse into the 'then' branch */
1475 if (!parser_next(parser)) {
1476 parseerror(parser, "expected for-loop body");
1479 ontrue = parser_parse_statement_or_block(parser);
1484 aloop = ast_loop_new(ctx, initexpr, cond, NULL, increment, ontrue);
1485 *out = (ast_expression*)aloop;
1487 while (parser->locals_count > parser->blocklocal)
1488 parser_pop_local(parser);
1489 parser->blocklocal = oldblocklocal;
1492 if (initexpr) ast_delete(initexpr);
1493 if (cond) ast_delete(cond);
1494 if (increment) ast_delete(increment);
1495 while (parser->locals_count > parser->blocklocal)
1496 parser_pop_local(parser);
1497 parser->blocklocal = oldblocklocal;
1501 static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expression **out)
1503 if (parser->tok == TOKEN_TYPENAME)
1505 /* local variable */
1507 parseerror(parser, "cannot declare a variable from here");
1510 if (opts_standard == COMPILER_QCC) {
1511 if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
1514 if (!parser_variable(parser, block))
1519 else if (parser->tok == TOKEN_KEYWORD)
1521 if (!strcmp(parser_tokval(parser), "local"))
1524 parseerror(parser, "cannot declare a local variable here");
1527 if (!parser_next(parser)) {
1528 parseerror(parser, "expected variable declaration");
1531 if (!parser_variable(parser, block))
1536 else if (!strcmp(parser_tokval(parser), "return"))
1538 ast_expression *exp = NULL;
1539 ast_return *ret = NULL;
1540 ast_value *expected = parser->function->vtype;
1542 if (!parser_next(parser)) {
1543 parseerror(parser, "expected return expression");
1547 if (parser->tok != ';') {
1548 exp = parser_expression(parser, false);
1552 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
1553 parseerror(parser, "return with invalid expression");
1556 ret = ast_return_new(exp->expression.node.context, exp);
1562 *out = (ast_expression*)ret;
1563 } else if (!parser_next(parser)) {
1564 parseerror(parser, "expected semicolon");
1565 if (expected->expression.next->expression.vtype != TYPE_VOID) {
1566 parseerror(parser, "return without value");
1571 else if (!strcmp(parser_tokval(parser), "if"))
1573 return parser_parse_if(parser, block, out);
1575 else if (!strcmp(parser_tokval(parser), "while"))
1577 return parser_parse_while(parser, block, out);
1579 else if (!strcmp(parser_tokval(parser), "do"))
1581 return parser_parse_dowhile(parser, block, out);
1583 else if (!strcmp(parser_tokval(parser), "for"))
1585 if (opts_standard == COMPILER_QCC) {
1586 if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
1589 return parser_parse_for(parser, block, out);
1591 parseerror(parser, "Unexpected keyword");
1594 else if (parser->tok == '{')
1597 inner = parser_parse_block(parser);
1600 *out = (ast_expression*)inner;
1605 ast_expression *exp = parser_expression(parser, false);
1613 static void parser_pop_local(parser_t *parser)
1615 parser->locals_count--;
1616 mem_d(parser->locals[parser->locals_count].name);
1619 static ast_block* parser_parse_block(parser_t *parser)
1621 size_t oldblocklocal;
1622 ast_block *block = NULL;
1624 oldblocklocal = parser->blocklocal;
1625 parser->blocklocal = parser->locals_count;
1627 if (!parser_next(parser)) { /* skip the '{' */
1628 parseerror(parser, "expected function body");
1632 block = ast_block_new(parser_ctx(parser));
1634 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1636 ast_expression *expr;
1637 if (parser->tok == '}')
1640 if (!parser_parse_statement(parser, block, &expr)) {
1641 ast_block_delete(block);
1647 if (!ast_block_exprs_add(block, expr)) {
1649 ast_block_delete(block);
1655 if (parser->tok != '}') {
1656 ast_block_delete(block);
1659 (void)parser_next(parser);
1663 while (parser->locals_count > parser->blocklocal)
1664 parser_pop_local(parser);
1665 parser->blocklocal = oldblocklocal;
1666 /* unroll the local vector */
1670 static ast_expression* parser_parse_statement_or_block(parser_t *parser)
1672 ast_expression *expr;
1673 if (parser->tok == '{')
1674 return (ast_expression*)parser_parse_block(parser);
1675 if (!parser_parse_statement(parser, NULL, &expr))
1680 static bool parser_variable(parser_t *parser, ast_block *localblock)
1682 bool isfunc = false;
1683 ast_function *func = NULL;
1687 ast_expression *olddecl;
1689 int basetype = parser_token(parser)->constval.t;
1693 if (!parser_next(parser)) { /* skip basetype or comma */
1694 parseerror(parser, "expected variable declaration");
1701 ctx = parser_ctx(parser);
1702 var = parser_parse_type(parser, basetype, &isfunc);
1707 if (parser->tok != TOKEN_IDENT) {
1708 parseerror(parser, "expected variable name\n");
1713 if (!localblock && (olddecl = parser_find_global(parser, parser_tokval(parser)))) {
1714 ast_value_delete(var);
1715 parseerror(parser, "global %s already declared here: %s:%i\n",
1716 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1720 if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
1721 ast_value_delete(var);
1722 parseerror(parser, "local %s already declared here: %s:%i\n",
1723 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1728 if (!ast_value_set_name(var, parser_tokval(parser))) {
1729 parseerror(parser, "failed to set variable name\n");
1730 ast_value_delete(var);
1735 /* a function was defined */
1737 ast_value *proto = NULL;
1740 olddecl = parser_find_global(parser, parser_tokval(parser));
1742 olddecl = parser_find_local(parser, parser_tokval(parser), parser->blocklocal);
1745 /* we had a prototype */
1746 if (!ast_istype(olddecl, ast_value)) {
1747 /* theoretically not possible you think?
1753 parseerror(parser, "cannot declare a function with the same name as a vector's member: %s",
1754 parser_tokval(parser));
1755 ast_value_delete(var);
1759 proto = (ast_value*)olddecl;
1762 /* turn var into a value of TYPE_FUNCTION, with the old var
1765 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1766 func = ast_function_new(ctx, var->name, fval);
1767 if (!fval || !func) {
1768 ast_value_delete(var);
1769 if (fval) ast_value_delete(fval);
1770 if (func) ast_function_delete(func);
1774 fval->expression.next = (ast_expression*)var;
1775 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1777 /* we compare the type late here, but it's easier than
1778 * messing with the parameter-vector etc. earlier
1781 if (!ast_compare_type((ast_expression*)proto, (ast_expression*)fval)) {
1782 parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
1784 ast_ctx(proto).file, ast_ctx(proto).line);
1785 ast_function_delete(func);
1786 ast_value_delete(fval);
1789 ast_function_delete(func);
1790 ast_value_delete(fval);
1792 func = var->constval.vfunc;
1796 if (!parser_t_functions_add(parser, func)) {
1797 ast_function_delete(func);
1798 ast_value_delete(fval);
1806 varent.name = util_strdup(var->name);
1807 varent.var = (ast_expression*)var;
1808 if (var->expression.vtype == TYPE_VECTOR)
1810 size_t len = strlen(varent.name);
1811 varentry_t vx, vy, vz;
1812 vx.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 0);
1813 vy.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 1);
1814 vz.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 2);
1815 vx.name = (char*)mem_a(len+3);
1816 vy.name = (char*)mem_a(len+3);
1817 vz.name = (char*)mem_a(len+3);
1818 memcpy(vx.name, varent.name, len);
1819 memcpy(vy.name, varent.name, len);
1820 memcpy(vz.name, varent.name, len);
1821 vx.name[len] = vy.name[len] = vz.name[len] = '_';
1822 vx.name[len+1] = 'x';
1823 vy.name[len+1] = 'y';
1824 vz.name[len+1] = 'z';
1825 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
1828 (void)!parser_t_globals_add(parser, varent);
1829 (void)!parser_t_globals_add(parser, vx);
1830 (void)!parser_t_globals_add(parser, vy);
1831 (void)!parser_t_globals_add(parser, vz);
1833 (void)!parser_t_locals_add(parser, varent);
1834 (void)!parser_t_locals_add(parser, vx);
1835 (void)!parser_t_locals_add(parser, vy);
1836 (void)!parser_t_locals_add(parser, vz);
1841 if ( (!localblock && !parser_t_globals_add(parser, varent)) ||
1842 ( localblock && !parser_t_locals_add(parser, varent)) )
1844 ast_value_delete(var);
1848 if (localblock && !ast_block_locals_add(localblock, var))
1850 parser_pop_local(parser);
1851 ast_value_delete(var);
1855 if (!parser_next(parser)) {
1856 ast_value_delete(var);
1860 if (parser->tok == ';') {
1861 if (!parser_next(parser))
1862 return parser->tok == TOKEN_EOF;
1866 if (parser->tok == ',') {
1871 if (parser->tok != '=') {
1872 parseerror(parser, "expected '=' or ';'");
1876 if (!parser_next(parser))
1879 if (parser->tok == '#') {
1881 parseerror(parser, "cannot declare builtins within functions");
1884 if (!isfunc || !func) {
1885 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
1888 if (!parser_next(parser)) {
1889 parseerror(parser, "expected builtin number");
1892 if (parser->tok != TOKEN_INTCONST) {
1893 parseerror(parser, "builtin number must be an integer constant");
1896 if (parser_token(parser)->constval.i <= 0) {
1897 parseerror(parser, "builtin number must be positive integer greater than zero");
1901 func->builtin = -parser_token(parser)->constval.i;
1903 if (!parser_next(parser))
1905 } else if (parser->tok == '{') {
1908 ast_function *old = parser->function;
1911 parseerror(parser, "cannot declare functions within functions");
1915 parser->function = func;
1916 block = parser_parse_block(parser);
1917 parser->function = old;
1922 if (!ast_function_blocks_add(func, block)) {
1923 ast_block_delete(block);
1927 if (parser->tok == ';')
1928 return parser_next(parser) || parser->tok == TOKEN_EOF;
1929 else if (opts_standard == COMPILER_QCC)
1930 parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
1933 ast_expression *cexp;
1936 cexp = parser_expression_leave(parser, true);
1937 cval = (ast_value*)cexp;
1938 if (!ast_istype(cval, ast_value) || !cval->isconst)
1939 parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
1942 var->isconst = true;
1943 memcpy(&var->constval, &cval->constval, sizeof(var->constval));
1944 memset(&cval->constval, 0, sizeof(cval->constval));
1949 if (parser->tok == ',') {
1954 if (parser->tok != ';') {
1955 parseerror(parser, "missing semicolon");
1959 (void)parser_next(parser);
1965 static bool parser_do(parser_t *parser)
1967 if (parser->tok == TOKEN_TYPENAME)
1969 return parser_variable(parser, NULL);
1971 else if (parser->tok == TOKEN_KEYWORD)
1973 /* handle 'var' and 'const' */
1976 else if (parser->tok == '.')
1980 ast_expression *oldex;
1981 bool isfunc = false;
1983 lex_ctx ctx = parser_ctx(parser);
1986 /* entity-member declaration */
1987 if (!parser_next(parser) || parser->tok != TOKEN_TYPENAME) {
1988 parseerror(parser, "expected member variable definition");
1992 /* remember the base/return type */
1993 basetype = parser_token(parser)->constval.t;
1995 /* parse into the declaration */
1996 if (!parser_next(parser)) {
1997 parseerror(parser, "expected field def");
2001 /* parse the field type fully */
2002 var = parser_parse_type(parser, basetype, &isfunc);
2007 /* now the field name */
2008 if (parser->tok != TOKEN_IDENT) {
2009 parseerror(parser, "expected field name");
2014 /* check for an existing field
2015 * in original qc we also have to check for an existing
2016 * global named like the field
2018 if (opts_standard == COMPILER_QCC) {
2019 if (parser_find_global(parser, parser_tokval(parser))) {
2020 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
2028 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
2030 ast_value_delete(var);
2033 fval->expression.next = (ast_expression*)var;
2034 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
2038 /* turn it into a field */
2039 fld = ast_value_new(ctx, parser_tokval(parser), TYPE_FIELD);
2040 fld->expression.next = (ast_expression*)var;
2042 if ( (oldex = parser_find_field(parser, parser_tokval(parser)))) {
2043 if (ast_istype(oldex, ast_member)) {
2044 parseerror(parser, "cannot declare a field with the same name as a vector component, component %s has been declared here: %s:%i",
2045 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line);
2049 if (!ast_istype(oldex, ast_value)) {
2050 /* not possible / sanity check */
2051 parseerror(parser, "internal error: %s is not an ast_value", parser_tokval(parser));
2056 if (!ast_compare_type(oldex, (ast_expression*)fld)) {
2057 parseerror(parser, "field %s has previously been declared with a different type here: %s:%i",
2058 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line);
2062 if (parsewarning(parser, WARN_FIELD_REDECLARED, "field %s has already been declared here: %s:%i",
2063 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line))
2074 varent.var = (ast_expression*)fld;
2075 varent.name = util_strdup(fld->name);
2076 (void)!parser_t_fields_add(parser, varent);
2078 if (var->expression.vtype == TYPE_VECTOR)
2080 /* create _x, _y and _z fields as well */
2082 varentry_t vx, vy, vz;
2084 len = strlen(varent.name);
2085 vx.var = (ast_expression*)ast_member_new(ast_ctx(fld), (ast_expression*)fld, 0);
2086 vy.var = (ast_expression*)ast_member_new(ast_ctx(fld), (ast_expression*)fld, 1);
2087 vz.var = (ast_expression*)ast_member_new(ast_ctx(fld), (ast_expression*)fld, 2);
2088 vx.name = (char*)mem_a(len+3);
2089 vy.name = (char*)mem_a(len+3);
2090 vz.name = (char*)mem_a(len+3);
2091 memcpy(vx.name, varent.name, len);
2092 memcpy(vy.name, varent.name, len);
2093 memcpy(vz.name, varent.name, len);
2094 vx.name[len] = vy.name[len] = vz.name[len] = '_';
2095 vx.name[len+1] = 'x';
2096 vy.name[len+1] = 'y';
2097 vz.name[len+1] = 'z';
2098 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
2099 (void)!parser_t_fields_add(parser, vx);
2100 (void)!parser_t_fields_add(parser, vy);
2101 (void)!parser_t_fields_add(parser, vz);
2105 if (!parser_next(parser)) {
2106 parseerror(parser, "expected semicolon or another field name");
2109 if (parser->tok == ';')
2111 if (parser->tok != ',' || !parser_next(parser)) {
2112 parseerror(parser, "expected semicolon or another field name");
2117 /* skip the semicolon */
2118 if (!parser_next(parser))
2119 return parser->tok == TOKEN_EOF;
2125 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
2131 static parser_t *parser;
2135 parser = (parser_t*)mem_a(sizeof(parser_t));
2139 memset(parser, 0, sizeof(*parser));
2143 bool parser_compile(const char *filename)
2145 parser->lex = lex_open(filename);
2147 printf("failed to open file \"%s\"\n", filename);
2151 /* initial lexer/parser state */
2152 parser->lex->flags.noops = true;
2154 if (parser_next(parser))
2156 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
2158 if (!parser_do(parser)) {
2159 if (parser->tok == TOKEN_EOF)
2160 parseerror(parser, "unexpected eof");
2161 else if (!parser->errors)
2162 parseerror(parser, "parse error\n");
2163 lex_close(parser->lex);
2170 lex_close(parser->lex);
2172 return !parser->errors;
2175 void parser_cleanup()
2178 for (i = 0; i < parser->functions_count; ++i) {
2179 ast_delete(parser->functions[i]);
2181 for (i = 0; i < parser->imm_vector_count; ++i) {
2182 ast_delete(parser->imm_vector[i]);
2184 for (i = 0; i < parser->imm_string_count; ++i) {
2185 ast_delete(parser->imm_string[i]);
2187 for (i = 0; i < parser->imm_float_count; ++i) {
2188 ast_delete(parser->imm_float[i]);
2190 for (i = 0; i < parser->globals_count; ++i) {
2191 ast_delete(parser->globals[i].var);
2192 mem_d(parser->globals[i].name);
2194 MEM_VECTOR_CLEAR(parser, globals);
2199 bool parser_finish(const char *output)
2204 if (!parser->errors)
2206 ir = ir_builder_new("gmqcc_out");
2208 printf("failed to allocate builder\n");
2212 for (i = 0; i < parser->imm_float_count; ++i) {
2213 if (!ast_global_codegen(parser->imm_float[i], ir)) {
2214 printf("failed to generate global %s\n", parser->imm_float[i]->name);
2215 ir_builder_delete(ir);
2219 for (i = 0; i < parser->imm_string_count; ++i) {
2220 if (!ast_global_codegen(parser->imm_string[i], ir)) {
2221 printf("failed to generate global %s\n", parser->imm_string[i]->name);
2222 ir_builder_delete(ir);
2226 for (i = 0; i < parser->imm_vector_count; ++i) {
2227 if (!ast_global_codegen(parser->imm_vector[i], ir)) {
2228 printf("failed to generate global %s\n", parser->imm_vector[i]->name);
2229 ir_builder_delete(ir);
2233 for (i = 0; i < parser->fields_count; ++i) {
2236 if (!ast_istype(parser->fields[i].var, ast_value))
2238 field = (ast_value*)parser->fields[i].var;
2239 isconst = field->isconst;
2240 field->isconst = false;
2241 if (!ast_global_codegen((ast_value*)field, ir)) {
2242 printf("failed to generate field %s\n", field->name);
2243 ir_builder_delete(ir);
2248 ast_expression *subtype;
2249 field->isconst = true;
2250 subtype = field->expression.next;
2251 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
2252 if (subtype->expression.vtype == TYPE_FIELD)
2253 ifld->fieldtype = subtype->expression.next->expression.vtype;
2254 else if (subtype->expression.vtype == TYPE_FUNCTION)
2255 ifld->outtype = subtype->expression.next->expression.vtype;
2256 (void)!ir_value_set_field(field->ir_v, ifld);
2259 for (i = 0; i < parser->globals_count; ++i) {
2260 if (!ast_istype(parser->globals[i].var, ast_value))
2262 if (!ast_global_codegen((ast_value*)(parser->globals[i].var), ir)) {
2263 printf("failed to generate global %s\n", parser->globals[i].name);
2264 ir_builder_delete(ir);
2268 for (i = 0; i < parser->functions_count; ++i) {
2269 if (!ast_function_codegen(parser->functions[i], ir)) {
2270 printf("failed to generate function %s\n", parser->functions[i]->name);
2271 ir_builder_delete(ir);
2274 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
2275 printf("failed to finalize function %s\n", parser->functions[i]->name);
2276 ir_builder_delete(ir);
2282 ir_builder_dump(ir, printf);
2284 if (!ir_builder_generate(ir, output)) {
2285 printf("*** failed to generate output file\n");
2286 ir_builder_delete(ir);
2290 ir_builder_delete(ir);
2294 printf("*** there were compile errors\n");