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 /* still get vars first since there could be a fieldpointer */
970 var = parser_find_var(parser, parser_tokval(parser));
972 var = parser_find_field(parser, parser_tokval(parser));
974 else if (parser->memberof == TYPE_VECTOR)
976 parseerror(parser, "TODO: implement effective vector member access");
979 else if (parser->memberof) {
980 parseerror(parser, "namespace for member not found");
984 var = parser_find_var(parser, parser_tokval(parser));
986 var = parser_find_var(parser, parser_tokval(parser));
988 var = parser_find_field(parser, parser_tokval(parser));
991 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
994 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), var))) {
995 parseerror(parser, "out of memory");
998 DEBUGSHUNTDO(printf("push %s\n", parser_tokval(parser)));
1000 else if (parser->tok == TOKEN_FLOATCONST) {
1003 parseerror(parser, "expected operator or end of statement, got constant");
1007 val = parser_const_float(parser, (parser_token(parser)->constval.f));
1010 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1011 parseerror(parser, "out of memory");
1014 DEBUGSHUNTDO(printf("push %g\n", parser_token(parser)->constval.f));
1016 else if (parser->tok == TOKEN_INTCONST) {
1019 parseerror(parser, "expected operator or end of statement, got constant");
1023 val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
1026 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1027 parseerror(parser, "out of memory");
1030 DEBUGSHUNTDO(printf("push %i\n", parser_token(parser)->constval.i));
1032 else if (parser->tok == TOKEN_STRINGCONST) {
1035 parseerror(parser, "expected operator or end of statement, got constant");
1039 val = parser_const_string(parser, parser_tokval(parser));
1042 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1043 parseerror(parser, "out of memory");
1046 DEBUGSHUNTDO(printf("push string\n"));
1048 else if (parser->tok == TOKEN_VECTORCONST) {
1051 parseerror(parser, "expected operator or end of statement, got constant");
1055 val = parser_const_vector(parser, parser_token(parser)->constval.v);
1058 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1059 parseerror(parser, "out of memory");
1062 DEBUGSHUNTDO(printf("push '%g %g %g'\n",
1063 parser_token(parser)->constval.v.x,
1064 parser_token(parser)->constval.v.y,
1065 parser_token(parser)->constval.v.z));
1067 else if (parser->tok == '(') {
1069 DEBUGSHUNTDO(printf("push (\n"));
1071 /* we expected an operator, this is the function-call operator */
1072 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f', sy.out_count-1))) {
1073 parseerror(parser, "out of memory");
1078 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1, 0))) {
1079 parseerror(parser, "out of memory");
1082 DEBUGSHUNTDO(printf("push (\n"));
1086 else if (parser->tok == ')') {
1088 DEBUGSHUNTDO(printf("do[op] )\n"));
1092 /* we do expect an operator next */
1093 /* closing an opening paren */
1094 if (!parser_close_paren(parser, &sy, false))
1097 DEBUGSHUNTDO(printf("do[nop] )\n"));
1101 /* allowed for function calls */
1102 if (!parser_close_paren(parser, &sy, true))
1107 else if (parser->tok != TOKEN_OPERATOR) {
1109 parseerror(parser, "expected operator or end of statement");
1116 /* classify the operator */
1117 /* TODO: suffix operators */
1118 const oper_info *op;
1119 const oper_info *olast = NULL;
1121 for (o = 0; o < operator_count; ++o) {
1122 if ((!(operators[o].flags & OP_PREFIX) == wantop) &&
1123 !(operators[o].flags & OP_SUFFIX) && /* remove this */
1124 !strcmp(parser_tokval(parser), operators[o].op))
1130 if (o == operator_count) {
1131 /* no operator found... must be the end of the statement */
1134 /* found an operator */
1137 /* when declaring variables, a comma starts a new variable */
1138 if (op->id == opid1(',') && !parens && stopatcomma)
1141 if (op->id == opid1('.')) {
1142 /* for gmqcc standard: open up the namespace of the previous type */
1143 ast_expression *prevex = sy.out[sy.out_count-1].out;
1145 parseerror(parser, "unexpected member operator");
1148 if (prevex->expression.vtype == TYPE_ENTITY)
1149 parser->memberof = TYPE_ENTITY;
1150 else if (prevex->expression.vtype == TYPE_VECTOR)
1151 parser->memberof = TYPE_VECTOR;
1153 parseerror(parser, "type error: type has no members");
1159 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
1160 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
1163 (op->prec < olast->prec) ||
1164 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
1166 if (!parser_sy_pop(parser, &sy))
1168 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
1169 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
1174 DEBUGSHUNTDO(printf("push operator %s\n", op->op));
1175 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
1178 if (!parser_next(parser)) {
1181 if (parser->tok == ';') {
1186 while (sy.ops_count) {
1187 if (!parser_sy_pop(parser, &sy))
1191 parser->lex->flags.noops = true;
1192 if (!sy.out_count) {
1193 parseerror(parser, "empty expression");
1196 expr = sy.out[0].out;
1197 MEM_VECTOR_CLEAR(&sy, out);
1198 MEM_VECTOR_CLEAR(&sy, ops);
1199 DEBUGSHUNTDO(printf("shunt done\n"));
1203 parser->lex->flags.noops = true;
1204 MEM_VECTOR_CLEAR(&sy, out);
1205 MEM_VECTOR_CLEAR(&sy, ops);
1209 static ast_expression* parser_expression(parser_t *parser, bool stopatcomma)
1211 ast_expression *e = parser_expression_leave(parser, stopatcomma);
1214 if (!parser_next(parser)) {
1221 static bool parser_parse_if(parser_t *parser, ast_block *block, ast_expression **out)
1224 ast_expression *cond, *ontrue, *onfalse = NULL;
1226 lex_ctx ctx = parser_ctx(parser);
1228 /* skip the 'if' and check for opening paren */
1229 if (!parser_next(parser) || parser->tok != '(') {
1230 parseerror(parser, "expected 'if' condition in parenthesis");
1233 /* parse into the expression */
1234 if (!parser_next(parser)) {
1235 parseerror(parser, "expected 'if' condition after opening paren");
1238 /* parse the condition */
1239 cond = parser_expression_leave(parser, false);
1243 if (parser->tok != ')') {
1244 parseerror(parser, "expected closing paren after 'if' condition");
1248 /* parse into the 'then' branch */
1249 if (!parser_next(parser)) {
1250 parseerror(parser, "expected statement for on-true branch of 'if'");
1254 ontrue = parser_parse_statement_or_block(parser);
1259 /* check for an else */
1260 if (!strcmp(parser_tokval(parser), "else")) {
1261 /* parse into the 'else' branch */
1262 if (!parser_next(parser)) {
1263 parseerror(parser, "expected on-false branch after 'else'");
1268 onfalse = parser_parse_statement_or_block(parser);
1276 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
1277 *out = (ast_expression*)ifthen;
1281 static bool parser_parse_while(parser_t *parser, ast_block *block, ast_expression **out)
1284 ast_expression *cond, *ontrue;
1286 lex_ctx ctx = parser_ctx(parser);
1288 /* skip the 'while' and check for opening paren */
1289 if (!parser_next(parser) || parser->tok != '(') {
1290 parseerror(parser, "expected 'while' condition in parenthesis");
1293 /* parse into the expression */
1294 if (!parser_next(parser)) {
1295 parseerror(parser, "expected 'while' condition after opening paren");
1298 /* parse the condition */
1299 cond = parser_expression_leave(parser, false);
1303 if (parser->tok != ')') {
1304 parseerror(parser, "expected closing paren after 'while' condition");
1308 /* parse into the 'then' branch */
1309 if (!parser_next(parser)) {
1310 parseerror(parser, "expected while-loop body");
1314 ontrue = parser_parse_statement_or_block(parser);
1320 aloop = ast_loop_new(ctx, NULL, cond, NULL, NULL, ontrue);
1321 *out = (ast_expression*)aloop;
1325 static bool parser_parse_dowhile(parser_t *parser, ast_block *block, ast_expression **out)
1328 ast_expression *cond, *ontrue;
1330 lex_ctx ctx = parser_ctx(parser);
1332 /* skip the 'do' and get the body */
1333 if (!parser_next(parser)) {
1334 parseerror(parser, "expected loop body");
1337 ontrue = parser_parse_statement_or_block(parser);
1341 /* expect the "while" */
1342 if (parser->tok != TOKEN_KEYWORD ||
1343 strcmp(parser_tokval(parser), "while"))
1345 parseerror(parser, "expected 'while' and condition");
1350 /* skip the 'while' and check for opening paren */
1351 if (!parser_next(parser) || parser->tok != '(') {
1352 parseerror(parser, "expected 'while' condition in parenthesis");
1356 /* parse into the expression */
1357 if (!parser_next(parser)) {
1358 parseerror(parser, "expected 'while' condition after opening paren");
1362 /* parse the condition */
1363 cond = parser_expression_leave(parser, false);
1367 if (parser->tok != ')') {
1368 parseerror(parser, "expected closing paren after 'while' condition");
1374 if (!parser_next(parser) || parser->tok != ';') {
1375 parseerror(parser, "expected semicolon after condition");
1381 if (!parser_next(parser)) {
1382 parseerror(parser, "parse error");
1388 aloop = ast_loop_new(ctx, NULL, NULL, cond, NULL, ontrue);
1389 *out = (ast_expression*)aloop;
1393 static bool parser_parse_for(parser_t *parser, ast_block *block, ast_expression **out)
1396 ast_expression *initexpr, *cond, *increment, *ontrue;
1397 size_t oldblocklocal;
1399 lex_ctx ctx = parser_ctx(parser);
1401 oldblocklocal = parser->blocklocal;
1402 parser->blocklocal = parser->locals_count;
1409 /* skip the 'while' and check for opening paren */
1410 if (!parser_next(parser) || parser->tok != '(') {
1411 parseerror(parser, "expected 'for' expressions in parenthesis");
1414 /* parse into the expression */
1415 if (!parser_next(parser)) {
1416 parseerror(parser, "expected 'for' initializer after opening paren");
1420 if (parser->tok == TOKEN_TYPENAME) {
1421 if (opts_standard != COMPILER_GMQCC) {
1422 if (parsewarning(parser, WARN_EXTENSIONS,
1423 "current standard does not allow variable declarations in for-loop initializers"))
1427 parseerror(parser, "TODO: assignment of new variables to be non-const");
1429 if (!parser_variable(parser, block))
1432 else if (parser->tok != ';')
1434 initexpr = parser_expression_leave(parser, false);
1439 /* move on to condition */
1440 if (parser->tok != ';') {
1441 parseerror(parser, "expected semicolon after for-loop initializer");
1444 if (!parser_next(parser)) {
1445 parseerror(parser, "expected for-loop condition");
1449 /* parse the condition */
1450 if (parser->tok != ';') {
1451 cond = parser_expression_leave(parser, false);
1456 /* move on to incrementor */
1457 if (parser->tok != ';') {
1458 parseerror(parser, "expected semicolon after for-loop initializer");
1461 if (!parser_next(parser)) {
1462 parseerror(parser, "expected for-loop condition");
1466 /* parse the incrementor */
1467 if (parser->tok != ')') {
1468 increment = parser_expression_leave(parser, false);
1474 if (parser->tok != ')') {
1475 parseerror(parser, "expected closing paren after 'for-loop' incrementor");
1478 /* parse into the 'then' branch */
1479 if (!parser_next(parser)) {
1480 parseerror(parser, "expected for-loop body");
1483 ontrue = parser_parse_statement_or_block(parser);
1488 aloop = ast_loop_new(ctx, initexpr, cond, NULL, increment, ontrue);
1489 *out = (ast_expression*)aloop;
1491 while (parser->locals_count > parser->blocklocal)
1492 parser_pop_local(parser);
1493 parser->blocklocal = oldblocklocal;
1496 if (initexpr) ast_delete(initexpr);
1497 if (cond) ast_delete(cond);
1498 if (increment) ast_delete(increment);
1499 while (parser->locals_count > parser->blocklocal)
1500 parser_pop_local(parser);
1501 parser->blocklocal = oldblocklocal;
1505 static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expression **out)
1507 if (parser->tok == TOKEN_TYPENAME)
1509 /* local variable */
1511 parseerror(parser, "cannot declare a variable from here");
1514 if (opts_standard == COMPILER_QCC) {
1515 if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
1518 if (!parser_variable(parser, block))
1523 else if (parser->tok == TOKEN_KEYWORD)
1525 if (!strcmp(parser_tokval(parser), "local"))
1528 parseerror(parser, "cannot declare a local variable here");
1531 if (!parser_next(parser)) {
1532 parseerror(parser, "expected variable declaration");
1535 if (!parser_variable(parser, block))
1540 else if (!strcmp(parser_tokval(parser), "return"))
1542 ast_expression *exp = NULL;
1543 ast_return *ret = NULL;
1544 ast_value *expected = parser->function->vtype;
1546 if (!parser_next(parser)) {
1547 parseerror(parser, "expected return expression");
1551 if (parser->tok != ';') {
1552 exp = parser_expression(parser, false);
1556 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
1557 parseerror(parser, "return with invalid expression");
1560 ret = ast_return_new(exp->expression.node.context, exp);
1566 *out = (ast_expression*)ret;
1567 } else if (!parser_next(parser)) {
1568 parseerror(parser, "expected semicolon");
1569 if (expected->expression.next->expression.vtype != TYPE_VOID) {
1570 parseerror(parser, "return without value");
1575 else if (!strcmp(parser_tokval(parser), "if"))
1577 return parser_parse_if(parser, block, out);
1579 else if (!strcmp(parser_tokval(parser), "while"))
1581 return parser_parse_while(parser, block, out);
1583 else if (!strcmp(parser_tokval(parser), "do"))
1585 return parser_parse_dowhile(parser, block, out);
1587 else if (!strcmp(parser_tokval(parser), "for"))
1589 if (opts_standard == COMPILER_QCC) {
1590 if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
1593 return parser_parse_for(parser, block, out);
1595 parseerror(parser, "Unexpected keyword");
1598 else if (parser->tok == '{')
1601 inner = parser_parse_block(parser);
1604 *out = (ast_expression*)inner;
1609 ast_expression *exp = parser_expression(parser, false);
1617 static void parser_pop_local(parser_t *parser)
1619 parser->locals_count--;
1620 mem_d(parser->locals[parser->locals_count].name);
1623 static ast_block* parser_parse_block(parser_t *parser)
1625 size_t oldblocklocal;
1626 ast_block *block = NULL;
1628 oldblocklocal = parser->blocklocal;
1629 parser->blocklocal = parser->locals_count;
1631 if (!parser_next(parser)) { /* skip the '{' */
1632 parseerror(parser, "expected function body");
1636 block = ast_block_new(parser_ctx(parser));
1638 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1640 ast_expression *expr;
1641 if (parser->tok == '}')
1644 if (!parser_parse_statement(parser, block, &expr)) {
1645 ast_block_delete(block);
1651 if (!ast_block_exprs_add(block, expr)) {
1653 ast_block_delete(block);
1659 if (parser->tok != '}') {
1660 ast_block_delete(block);
1663 (void)parser_next(parser);
1667 while (parser->locals_count > parser->blocklocal)
1668 parser_pop_local(parser);
1669 parser->blocklocal = oldblocklocal;
1670 /* unroll the local vector */
1674 static ast_expression* parser_parse_statement_or_block(parser_t *parser)
1676 ast_expression *expr;
1677 if (parser->tok == '{')
1678 return (ast_expression*)parser_parse_block(parser);
1679 if (!parser_parse_statement(parser, NULL, &expr))
1684 static bool parser_variable(parser_t *parser, ast_block *localblock)
1686 bool isfunc = false;
1687 ast_function *func = NULL;
1691 ast_expression *olddecl;
1693 int basetype = parser_token(parser)->constval.t;
1697 if (!parser_next(parser)) { /* skip basetype or comma */
1698 parseerror(parser, "expected variable declaration");
1705 ctx = parser_ctx(parser);
1706 var = parser_parse_type(parser, basetype, &isfunc);
1711 if (parser->tok != TOKEN_IDENT) {
1712 parseerror(parser, "expected variable name\n");
1717 if (!localblock && (olddecl = parser_find_global(parser, parser_tokval(parser)))) {
1718 ast_value_delete(var);
1719 parseerror(parser, "global %s already declared here: %s:%i\n",
1720 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1724 if (localblock && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
1725 ast_value_delete(var);
1726 parseerror(parser, "local %s already declared here: %s:%i\n",
1727 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1732 if (!ast_value_set_name(var, parser_tokval(parser))) {
1733 parseerror(parser, "failed to set variable name\n");
1734 ast_value_delete(var);
1739 /* a function was defined */
1741 ast_value *proto = NULL;
1744 olddecl = parser_find_global(parser, parser_tokval(parser));
1746 olddecl = parser_find_local(parser, parser_tokval(parser), parser->blocklocal);
1749 /* we had a prototype */
1750 if (!ast_istype(olddecl, ast_value)) {
1751 /* theoretically not possible you think?
1757 parseerror(parser, "cannot declare a function with the same name as a vector's member: %s",
1758 parser_tokval(parser));
1759 ast_value_delete(var);
1763 proto = (ast_value*)olddecl;
1766 /* turn var into a value of TYPE_FUNCTION, with the old var
1769 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1770 func = ast_function_new(ctx, var->name, fval);
1771 if (!fval || !func) {
1772 ast_value_delete(var);
1773 if (fval) ast_value_delete(fval);
1774 if (func) ast_function_delete(func);
1778 fval->expression.next = (ast_expression*)var;
1779 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1781 /* we compare the type late here, but it's easier than
1782 * messing with the parameter-vector etc. earlier
1785 if (!ast_compare_type((ast_expression*)proto, (ast_expression*)fval)) {
1786 parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
1788 ast_ctx(proto).file, ast_ctx(proto).line);
1789 ast_function_delete(func);
1790 ast_value_delete(fval);
1793 ast_function_delete(func);
1794 ast_value_delete(fval);
1796 func = var->constval.vfunc;
1800 if (!parser_t_functions_add(parser, func)) {
1801 ast_function_delete(func);
1802 ast_value_delete(fval);
1810 varent.name = util_strdup(var->name);
1811 varent.var = (ast_expression*)var;
1812 if (var->expression.vtype == TYPE_VECTOR)
1814 size_t len = strlen(varent.name);
1815 varentry_t vx, vy, vz;
1816 vx.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 0);
1817 vy.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 1);
1818 vz.var = (ast_expression*)ast_member_new(var->expression.node.context, (ast_expression*)var, 2);
1819 vx.name = (char*)mem_a(len+3);
1820 vy.name = (char*)mem_a(len+3);
1821 vz.name = (char*)mem_a(len+3);
1822 memcpy(vx.name, varent.name, len);
1823 memcpy(vy.name, varent.name, len);
1824 memcpy(vz.name, varent.name, len);
1825 vx.name[len] = vy.name[len] = vz.name[len] = '_';
1826 vx.name[len+1] = 'x';
1827 vy.name[len+1] = 'y';
1828 vz.name[len+1] = 'z';
1829 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
1832 (void)!parser_t_globals_add(parser, varent);
1833 (void)!parser_t_globals_add(parser, vx);
1834 (void)!parser_t_globals_add(parser, vy);
1835 (void)!parser_t_globals_add(parser, vz);
1837 (void)!parser_t_locals_add(parser, varent);
1838 (void)!parser_t_locals_add(parser, vx);
1839 (void)!parser_t_locals_add(parser, vy);
1840 (void)!parser_t_locals_add(parser, vz);
1845 if ( (!localblock && !parser_t_globals_add(parser, varent)) ||
1846 ( localblock && !parser_t_locals_add(parser, varent)) )
1848 ast_value_delete(var);
1852 if (localblock && !ast_block_locals_add(localblock, var))
1854 parser_pop_local(parser);
1855 ast_value_delete(var);
1859 if (!parser_next(parser)) {
1860 ast_value_delete(var);
1864 if (parser->tok == ';') {
1865 if (!parser_next(parser))
1866 return parser->tok == TOKEN_EOF;
1870 if (parser->tok == ',') {
1875 if (parser->tok != '=') {
1876 parseerror(parser, "expected '=' or ';'");
1880 if (!parser_next(parser))
1883 if (parser->tok == '#') {
1885 parseerror(parser, "cannot declare builtins within functions");
1888 if (!isfunc || !func) {
1889 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
1892 if (!parser_next(parser)) {
1893 parseerror(parser, "expected builtin number");
1896 if (parser->tok != TOKEN_INTCONST) {
1897 parseerror(parser, "builtin number must be an integer constant");
1900 if (parser_token(parser)->constval.i <= 0) {
1901 parseerror(parser, "builtin number must be positive integer greater than zero");
1905 func->builtin = -parser_token(parser)->constval.i;
1907 if (!parser_next(parser))
1909 } else if (parser->tok == '{') {
1912 ast_function *old = parser->function;
1915 parseerror(parser, "cannot declare functions within functions");
1919 parser->function = func;
1920 block = parser_parse_block(parser);
1921 parser->function = old;
1926 if (!ast_function_blocks_add(func, block)) {
1927 ast_block_delete(block);
1931 if (parser->tok == ';')
1932 return parser_next(parser) || parser->tok == TOKEN_EOF;
1933 else if (opts_standard == COMPILER_QCC)
1934 parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
1937 ast_expression *cexp;
1940 cexp = parser_expression_leave(parser, true);
1941 cval = (ast_value*)cexp;
1942 if (!ast_istype(cval, ast_value) || !cval->isconst)
1943 parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
1946 var->isconst = true;
1947 memcpy(&var->constval, &cval->constval, sizeof(var->constval));
1948 memset(&cval->constval, 0, sizeof(cval->constval));
1953 if (parser->tok == ',') {
1958 if (parser->tok != ';') {
1959 parseerror(parser, "missing semicolon");
1963 (void)parser_next(parser);
1969 static bool parser_do(parser_t *parser)
1971 if (parser->tok == TOKEN_TYPENAME)
1973 return parser_variable(parser, NULL);
1975 else if (parser->tok == TOKEN_KEYWORD)
1977 /* handle 'var' and 'const' */
1980 else if (parser->tok == '.')
1984 ast_expression *oldex;
1985 bool isfunc = false;
1987 lex_ctx ctx = parser_ctx(parser);
1990 /* entity-member declaration */
1991 if (!parser_next(parser) || parser->tok != TOKEN_TYPENAME) {
1992 parseerror(parser, "expected member variable definition");
1996 /* remember the base/return type */
1997 basetype = parser_token(parser)->constval.t;
1999 /* parse into the declaration */
2000 if (!parser_next(parser)) {
2001 parseerror(parser, "expected field def");
2005 /* parse the field type fully */
2006 var = parser_parse_type(parser, basetype, &isfunc);
2011 /* now the field name */
2012 if (parser->tok != TOKEN_IDENT) {
2013 parseerror(parser, "expected field name");
2018 /* check for an existing field
2019 * in original qc we also have to check for an existing
2020 * global named like the field
2022 if (opts_standard == COMPILER_QCC) {
2023 if (parser_find_global(parser, parser_tokval(parser))) {
2024 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
2032 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
2034 ast_value_delete(var);
2037 fval->expression.next = (ast_expression*)var;
2038 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
2042 /* turn it into a field */
2043 fld = ast_value_new(ctx, parser_tokval(parser), TYPE_FIELD);
2044 fld->expression.next = (ast_expression*)var;
2046 if ( (oldex = parser_find_field(parser, parser_tokval(parser)))) {
2047 if (ast_istype(oldex, ast_member)) {
2048 parseerror(parser, "cannot declare a field with the same name as a vector component, component %s has been declared here: %s:%i",
2049 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line);
2053 if (!ast_istype(oldex, ast_value)) {
2054 /* not possible / sanity check */
2055 parseerror(parser, "internal error: %s is not an ast_value", parser_tokval(parser));
2060 if (!ast_compare_type(oldex, (ast_expression*)fld)) {
2061 parseerror(parser, "field %s has previously been declared with a different type here: %s:%i",
2062 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line);
2066 if (parsewarning(parser, WARN_FIELD_REDECLARED, "field %s has already been declared here: %s:%i",
2067 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line))
2078 varent.var = (ast_expression*)fld;
2079 varent.name = util_strdup(fld->name);
2080 (void)!parser_t_fields_add(parser, varent);
2082 if (var->expression.vtype == TYPE_VECTOR)
2084 /* create _x, _y and _z fields as well */
2086 varentry_t vx, vy, vz;
2088 len = strlen(varent.name);
2089 vx.var = (ast_expression*)ast_member_new(ast_ctx(fld), (ast_expression*)fld, 0);
2090 vy.var = (ast_expression*)ast_member_new(ast_ctx(fld), (ast_expression*)fld, 1);
2091 vz.var = (ast_expression*)ast_member_new(ast_ctx(fld), (ast_expression*)fld, 2);
2092 vx.name = (char*)mem_a(len+3);
2093 vy.name = (char*)mem_a(len+3);
2094 vz.name = (char*)mem_a(len+3);
2095 memcpy(vx.name, varent.name, len);
2096 memcpy(vy.name, varent.name, len);
2097 memcpy(vz.name, varent.name, len);
2098 vx.name[len] = vy.name[len] = vz.name[len] = '_';
2099 vx.name[len+1] = 'x';
2100 vy.name[len+1] = 'y';
2101 vz.name[len+1] = 'z';
2102 vx.name[len+2] = vy.name[len+2] = vz.name[len+2] = 0;
2103 (void)!parser_t_fields_add(parser, vx);
2104 (void)!parser_t_fields_add(parser, vy);
2105 (void)!parser_t_fields_add(parser, vz);
2109 if (!parser_next(parser)) {
2110 parseerror(parser, "expected semicolon or another field name");
2113 if (parser->tok == ';')
2115 if (parser->tok != ',' || !parser_next(parser)) {
2116 parseerror(parser, "expected semicolon or another field name");
2121 /* skip the semicolon */
2122 if (!parser_next(parser))
2123 return parser->tok == TOKEN_EOF;
2129 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
2135 static parser_t *parser;
2139 parser = (parser_t*)mem_a(sizeof(parser_t));
2143 memset(parser, 0, sizeof(*parser));
2147 bool parser_compile(const char *filename)
2149 parser->lex = lex_open(filename);
2151 printf("failed to open file \"%s\"\n", filename);
2155 /* initial lexer/parser state */
2156 parser->lex->flags.noops = true;
2158 if (parser_next(parser))
2160 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
2162 if (!parser_do(parser)) {
2163 if (parser->tok == TOKEN_EOF)
2164 parseerror(parser, "unexpected eof");
2165 else if (!parser->errors)
2166 parseerror(parser, "parse error\n");
2167 lex_close(parser->lex);
2174 lex_close(parser->lex);
2176 return !parser->errors;
2179 void parser_cleanup()
2182 for (i = 0; i < parser->functions_count; ++i) {
2183 ast_delete(parser->functions[i]);
2185 for (i = 0; i < parser->imm_vector_count; ++i) {
2186 ast_delete(parser->imm_vector[i]);
2188 for (i = 0; i < parser->imm_string_count; ++i) {
2189 ast_delete(parser->imm_string[i]);
2191 for (i = 0; i < parser->imm_float_count; ++i) {
2192 ast_delete(parser->imm_float[i]);
2194 for (i = 0; i < parser->globals_count; ++i) {
2195 ast_delete(parser->globals[i].var);
2196 mem_d(parser->globals[i].name);
2198 MEM_VECTOR_CLEAR(parser, globals);
2203 bool parser_finish(const char *output)
2208 if (!parser->errors)
2210 ir = ir_builder_new("gmqcc_out");
2212 printf("failed to allocate builder\n");
2216 for (i = 0; i < parser->imm_float_count; ++i) {
2217 if (!ast_global_codegen(parser->imm_float[i], ir)) {
2218 printf("failed to generate global %s\n", parser->imm_float[i]->name);
2219 ir_builder_delete(ir);
2223 for (i = 0; i < parser->imm_string_count; ++i) {
2224 if (!ast_global_codegen(parser->imm_string[i], ir)) {
2225 printf("failed to generate global %s\n", parser->imm_string[i]->name);
2226 ir_builder_delete(ir);
2230 for (i = 0; i < parser->imm_vector_count; ++i) {
2231 if (!ast_global_codegen(parser->imm_vector[i], ir)) {
2232 printf("failed to generate global %s\n", parser->imm_vector[i]->name);
2233 ir_builder_delete(ir);
2237 for (i = 0; i < parser->fields_count; ++i) {
2240 if (!ast_istype(parser->fields[i].var, ast_value))
2242 field = (ast_value*)parser->fields[i].var;
2243 isconst = field->isconst;
2244 field->isconst = false;
2245 if (!ast_global_codegen((ast_value*)field, ir)) {
2246 printf("failed to generate field %s\n", field->name);
2247 ir_builder_delete(ir);
2252 ast_expression *subtype;
2253 field->isconst = true;
2254 subtype = field->expression.next;
2255 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
2256 if (subtype->expression.vtype == TYPE_FIELD)
2257 ifld->fieldtype = subtype->expression.next->expression.vtype;
2258 else if (subtype->expression.vtype == TYPE_FUNCTION)
2259 ifld->outtype = subtype->expression.next->expression.vtype;
2260 (void)!ir_value_set_field(field->ir_v, ifld);
2263 for (i = 0; i < parser->globals_count; ++i) {
2264 if (!ast_istype(parser->globals[i].var, ast_value))
2266 if (!ast_global_codegen((ast_value*)(parser->globals[i].var), ir)) {
2267 printf("failed to generate global %s\n", parser->globals[i].name);
2268 ir_builder_delete(ir);
2272 for (i = 0; i < parser->functions_count; ++i) {
2273 if (!ast_function_codegen(parser->functions[i], ir)) {
2274 printf("failed to generate function %s\n", parser->functions[i]->name);
2275 ir_builder_delete(ir);
2278 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
2279 printf("failed to finalize function %s\n", parser->functions[i]->name);
2280 ir_builder_delete(ir);
2286 ir_builder_dump(ir, printf);
2288 if (!ir_builder_generate(ir, output)) {
2289 printf("*** failed to generate output file\n");
2290 ir_builder_delete(ir);
2294 ir_builder_delete(ir);
2298 printf("*** there were compile errors\n");