5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is furnished to do
10 * so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 #define PARSER_HT_FIELDS 0
30 #define PARSER_HT_GLOBALS 1
31 /* beginning of locals */
32 #define PARSER_HT_LOCALS 2
34 #define PARSER_HT_SIZE 1024
35 #define TYPEDEF_HT_SIZE 16
41 ast_expression **globals;
42 ast_expression **fields;
43 ast_function **functions;
44 ast_value **imm_float;
45 ast_value **imm_string;
46 ast_value **imm_vector;
49 /* must be deleted first, they reference immediates and values */
50 ast_value **accessors;
52 ast_value *imm_float_zero;
53 ast_value *imm_float_one;
54 ast_value *imm_vector_zero;
59 ast_function *function;
61 /* A list of hashtables for each scope */
67 /* not to be used directly, we use the hash table */
68 ast_expression **_locals;
70 ast_value **_typedefs;
71 size_t *_blocktypedefs;
75 /* we store the '=' operator info */
76 const oper_info *assign_op;
78 /* TYPE_FIELD -> parser_find_fields is used instead of find_var
79 * TODO: TYPE_VECTOR -> x, y and z are accepted in the gmqcc standard
80 * anything else: type error
89 static void parser_enterblock(parser_t *parser);
90 static bool parser_leaveblock(parser_t *parser);
91 static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e);
92 static bool parse_typedef(parser_t *parser);
93 static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int is_const_var, ast_value *cached_typedef);
94 static ast_block* parse_block(parser_t *parser, bool warnreturn);
95 static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn);
96 static ast_expression* parse_statement_or_block(parser_t *parser);
97 static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases);
98 static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma);
99 static ast_expression* parse_expression(parser_t *parser, bool stopatcomma);
101 static void parseerror(parser_t *parser, const char *fmt, ...)
108 con_vprintmsg(LVL_ERROR, parser->lex->tok.ctx.file, parser->lex->tok.ctx.line, "parse error", fmt, ap);
112 /* returns true if it counts as an error */
113 static bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *fmt, ...)
116 int lvl = LVL_WARNING;
118 if (!OPTS_WARN(warntype))
127 con_vprintmsg(lvl, parser->lex->tok.ctx.file, parser->lex->tok.ctx.line, "warning", fmt, ap);
133 static bool GMQCC_WARN genwarning(lex_ctx ctx, int warntype, const char *fmt, ...)
136 int lvl = LVL_WARNING;
138 if (!OPTS_WARN(warntype))
145 con_vprintmsg(lvl, ctx.file, ctx.line, "warning", fmt, ap);
151 /**********************************************************************
152 * some maths used for constant folding
155 vector vec3_add(vector a, vector b)
164 vector vec3_sub(vector a, vector b)
173 qcfloat vec3_mulvv(vector a, vector b)
175 return (a.x * b.x + a.y * b.y + a.z * b.z);
178 vector vec3_mulvf(vector a, float b)
187 /**********************************************************************
191 bool parser_next(parser_t *parser)
193 /* lex_do kills the previous token */
194 parser->tok = lex_do(parser->lex);
195 if (parser->tok == TOKEN_EOF)
197 if (parser->tok >= TOKEN_ERROR) {
198 parseerror(parser, "lex error");
204 #define parser_tokval(p) ((p)->lex->tok.value)
205 #define parser_token(p) (&((p)->lex->tok))
206 #define parser_ctx(p) ((p)->lex->tok.ctx)
208 static ast_value* parser_const_float(parser_t *parser, double d)
212 for (i = 0; i < vec_size(parser->imm_float); ++i) {
213 const double compare = parser->imm_float[i]->constval.vfloat;
214 if (memcmp((const void*)&compare, (const void *)&d, sizeof(double)) == 0)
215 return parser->imm_float[i];
217 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
218 out->constant = true;
219 out->hasvalue = true;
220 out->constval.vfloat = d;
221 vec_push(parser->imm_float, out);
225 static ast_value* parser_const_float_0(parser_t *parser)
227 if (!parser->imm_float_zero)
228 parser->imm_float_zero = parser_const_float(parser, 0);
229 return parser->imm_float_zero;
232 static ast_value* parser_const_float_1(parser_t *parser)
234 if (!parser->imm_float_one)
235 parser->imm_float_one = parser_const_float(parser, 1);
236 return parser->imm_float_one;
239 static char *parser_strdup(const char *str)
242 /* actually dup empty strings */
243 char *out = mem_a(1);
247 return util_strdup(str);
250 static ast_value* parser_const_string(parser_t *parser, const char *str, bool dotranslate)
254 for (i = 0; i < vec_size(parser->imm_string); ++i) {
255 if (!strcmp(parser->imm_string[i]->constval.vstring, str))
256 return parser->imm_string[i];
260 snprintf(name, sizeof(name), "dotranslate_%lu", (unsigned long)(parser->translated++));
261 out = ast_value_new(parser_ctx(parser), name, TYPE_STRING);
263 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_STRING);
264 out->constant = true;
265 out->hasvalue = true;
266 out->constval.vstring = parser_strdup(str);
267 vec_push(parser->imm_string, out);
271 static ast_value* parser_const_vector(parser_t *parser, vector v)
275 for (i = 0; i < vec_size(parser->imm_vector); ++i) {
276 if (!memcmp(&parser->imm_vector[i]->constval.vvec, &v, sizeof(v)))
277 return parser->imm_vector[i];
279 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_VECTOR);
280 out->constant = true;
281 out->hasvalue = true;
282 out->constval.vvec = v;
283 vec_push(parser->imm_vector, out);
287 static ast_value* parser_const_vector_f(parser_t *parser, float x, float y, float z)
293 return parser_const_vector(parser, v);
296 static ast_value* parser_const_vector_0(parser_t *parser)
298 if (!parser->imm_vector_zero)
299 parser->imm_vector_zero = parser_const_vector_f(parser, 0, 0, 0);
300 return parser->imm_vector_zero;
303 static ast_expression* parser_find_field(parser_t *parser, const char *name)
305 return util_htget(parser->htfields, name);
308 static ast_expression* parser_find_global(parser_t *parser, const char *name)
310 return util_htget(parser->htglobals, name);
313 static ast_expression* parser_find_param(parser_t *parser, const char *name)
317 if (!parser->function)
319 fun = parser->function->vtype;
320 for (i = 0; i < vec_size(fun->expression.params); ++i) {
321 if (!strcmp(fun->expression.params[i]->name, name))
322 return (ast_expression*)(fun->expression.params[i]);
327 static ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto, bool *isparam)
332 hash = util_hthash(parser->htglobals, name);
335 for (i = vec_size(parser->variables); i > upto;) {
337 if ( (e = util_htgeth(parser->variables[i], name, hash)) )
341 return parser_find_param(parser, name);
344 static ast_expression* parser_find_var(parser_t *parser, const char *name)
348 v = parser_find_local(parser, name, 0, &dummy);
349 if (!v) v = parser_find_global(parser, name);
353 static ast_value* parser_find_typedef(parser_t *parser, const char *name, size_t upto)
357 hash = util_hthash(parser->typedefs[0], name);
359 for (i = vec_size(parser->typedefs); i > upto;) {
361 if ( (e = (ast_value*)util_htgeth(parser->typedefs[i], name, hash)) )
369 size_t etype; /* 0 = expression, others are operators */
373 ast_block *block; /* for commas and function calls */
382 #define SY_PAREN_EXPR '('
383 #define SY_PAREN_FUNC 'f'
384 #define SY_PAREN_INDEX '['
386 static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
397 static sy_elem syblock(lex_ctx ctx, ast_block *v) {
401 e.out = (ast_expression*)v;
408 static sy_elem syop(lex_ctx ctx, const oper_info *op) {
410 e.etype = 1 + (op - operators);
419 static sy_elem syparen(lex_ctx ctx, int p, size_t off) {
431 # define DEBUGSHUNTDO(x) x
433 # define DEBUGSHUNTDO(x)
436 /* With regular precedence rules, ent.foo[n] is the same as (ent.foo)[n],
437 * so we need to rotate it to become ent.(foo[n]).
439 static bool rotate_entfield_array_index_nodes(ast_expression **out)
441 ast_array_index *index;
442 ast_entfield *entfield;
446 ast_expression *entity;
448 lex_ctx ctx = ast_ctx(*out);
450 if (!ast_istype(*out, ast_array_index))
452 index = (ast_array_index*)*out;
454 if (!ast_istype(index->array, ast_entfield))
456 entfield = (ast_entfield*)index->array;
458 if (!ast_istype(entfield->field, ast_value))
460 field = (ast_value*)entfield->field;
463 entity = entfield->entity;
467 index = ast_array_index_new(ctx, (ast_expression*)field, sub);
468 entfield = ast_entfield_new(ctx, entity, (ast_expression*)index);
469 *out = (ast_expression*)entfield;
474 static bool parser_sy_pop(parser_t *parser, shunt *sy)
478 ast_expression *out = NULL;
479 ast_expression *exprs[3];
480 ast_block *blocks[3];
481 ast_value *asvalue[3];
482 size_t i, assignop, addop, subop;
483 qcint generated_op = 0;
488 if (!vec_size(sy->ops)) {
489 parseerror(parser, "internal error: missing operator");
493 if (vec_last(sy->ops).paren) {
494 parseerror(parser, "unmatched parenthesis");
498 op = &operators[vec_last(sy->ops).etype - 1];
499 ctx = vec_last(sy->ops).ctx;
501 DEBUGSHUNTDO(con_out("apply %s\n", op->op));
503 if (vec_size(sy->out) < op->operands) {
504 parseerror(parser, "internal error: not enough operands: %i (operator %s (%i))", vec_size(sy->out),
505 op->op, (int)op->id);
509 vec_shrinkby(sy->ops, 1);
511 vec_shrinkby(sy->out, op->operands);
512 for (i = 0; i < op->operands; ++i) {
513 exprs[i] = sy->out[vec_size(sy->out)+i].out;
514 blocks[i] = sy->out[vec_size(sy->out)+i].block;
515 asvalue[i] = (ast_value*)exprs[i];
518 if (blocks[0] && !vec_size(blocks[0]->exprs) && op->id != opid1(',')) {
519 parseerror(parser, "internal error: operator cannot be applied on empty blocks");
523 #define NotSameType(T) \
524 (exprs[0]->expression.vtype != exprs[1]->expression.vtype || \
525 exprs[0]->expression.vtype != T)
526 #define CanConstFold1(A) \
527 (ast_istype((A), ast_value) && ((ast_value*)(A))->hasvalue && ((ast_value*)(A))->constant)
528 #define CanConstFold(A, B) \
529 (CanConstFold1(A) && CanConstFold1(B))
530 #define ConstV(i) (asvalue[(i)]->constval.vvec)
531 #define ConstF(i) (asvalue[(i)]->constval.vfloat)
532 #define ConstS(i) (asvalue[(i)]->constval.vstring)
536 parseerror(parser, "internal error: unhandled operator: %s (%i)", op->op, (int)op->id);
540 if (exprs[0]->expression.vtype == TYPE_ENTITY) {
541 if (exprs[1]->expression.vtype != TYPE_FIELD) {
542 parseerror(parser, "type error: right hand of member-operand should be an entity-field");
545 out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
547 else if (exprs[0]->expression.vtype == TYPE_VECTOR) {
548 parseerror(parser, "internal error: vector access is not supposed to be handled at this point");
552 parseerror(parser, "type error: member-of operator on something that is not an entity or vector");
558 if (exprs[0]->expression.vtype != TYPE_ARRAY &&
559 !(exprs[0]->expression.vtype == TYPE_FIELD &&
560 exprs[0]->expression.next->expression.vtype == TYPE_ARRAY))
562 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
563 parseerror(parser, "cannot index value of type %s", ty1);
566 if (exprs[1]->expression.vtype != TYPE_FLOAT) {
567 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
568 parseerror(parser, "index must be of type float, not %s", ty1);
571 out = (ast_expression*)ast_array_index_new(ctx, exprs[0], exprs[1]);
572 if (rotate_entfield_array_index_nodes(&out))
574 if (opts_standard != COMPILER_GMQCC) {
575 /* this error doesn't need to make us bail out */
576 (void)!parsewarning(parser, WARN_EXTENSIONS,
577 "accessing array-field members of an entity without parenthesis\n"
578 " -> this is an extension from -std=gmqcc");
585 ast_block_add_expr(blocks[0], exprs[1]);
587 blocks[0] = ast_block_new(ctx);
588 ast_block_add_expr(blocks[0], exprs[0]);
589 ast_block_add_expr(blocks[0], exprs[1]);
591 if (!ast_block_set_type(blocks[0], exprs[1]))
594 vec_push(sy->out, syblock(ctx, blocks[0]));
598 switch (exprs[0]->expression.vtype) {
600 if (CanConstFold1(exprs[0]))
601 out = (ast_expression*)parser_const_float(parser, -ConstF(0));
603 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F,
604 (ast_expression*)parser_const_float_0(parser),
608 if (CanConstFold1(exprs[0]))
609 out = (ast_expression*)parser_const_vector_f(parser,
610 -ConstV(0).x, -ConstV(0).y, -ConstV(0).z);
612 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V,
613 (ast_expression*)parser_const_vector_0(parser),
617 parseerror(parser, "invalid types used in expression: cannot negate type %s",
618 type_name[exprs[0]->expression.vtype]);
624 switch (exprs[0]->expression.vtype) {
626 if (CanConstFold1(exprs[0]))
627 out = (ast_expression*)parser_const_float(parser, !ConstF(0));
629 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
632 if (CanConstFold1(exprs[0]))
633 out = (ast_expression*)parser_const_float(parser,
634 (!ConstV(0).x && !ConstV(0).y && !ConstV(0).z));
636 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[0]);
639 if (CanConstFold1(exprs[0]))
640 out = (ast_expression*)parser_const_float(parser, !ConstS(0) || !*ConstS(0));
642 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[0]);
644 /* we don't constant-fold NOT for these types */
646 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_ENT, exprs[0]);
649 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_FNC, exprs[0]);
652 parseerror(parser, "invalid types used in expression: cannot logically negate type %s",
653 type_name[exprs[0]->expression.vtype]);
659 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
660 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
662 parseerror(parser, "invalid types used in expression: cannot add type %s and %s",
663 type_name[exprs[0]->expression.vtype],
664 type_name[exprs[1]->expression.vtype]);
667 switch (exprs[0]->expression.vtype) {
669 if (CanConstFold(exprs[0], exprs[1]))
671 out = (ast_expression*)parser_const_float(parser, ConstF(0) + ConstF(1));
674 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
677 if (CanConstFold(exprs[0], exprs[1]))
678 out = (ast_expression*)parser_const_vector(parser, vec3_add(ConstV(0), ConstV(1)));
680 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
683 parseerror(parser, "invalid types used in expression: cannot add type %s and %s",
684 type_name[exprs[0]->expression.vtype],
685 type_name[exprs[1]->expression.vtype]);
690 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
691 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
693 parseerror(parser, "invalid types used in expression: cannot subtract type %s from %s",
694 type_name[exprs[1]->expression.vtype],
695 type_name[exprs[0]->expression.vtype]);
698 switch (exprs[0]->expression.vtype) {
700 if (CanConstFold(exprs[0], exprs[1]))
701 out = (ast_expression*)parser_const_float(parser, ConstF(0) - ConstF(1));
703 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
706 if (CanConstFold(exprs[0], exprs[1]))
707 out = (ast_expression*)parser_const_vector(parser, vec3_sub(ConstV(0), ConstV(1)));
709 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
712 parseerror(parser, "invalid types used in expression: cannot subtract type %s from %s",
713 type_name[exprs[1]->expression.vtype],
714 type_name[exprs[0]->expression.vtype]);
719 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
720 exprs[0]->expression.vtype != TYPE_VECTOR &&
721 exprs[0]->expression.vtype != TYPE_FLOAT &&
722 exprs[1]->expression.vtype != TYPE_VECTOR &&
723 exprs[1]->expression.vtype != TYPE_FLOAT)
725 parseerror(parser, "invalid types used in expression: cannot multiply types %s and %s",
726 type_name[exprs[1]->expression.vtype],
727 type_name[exprs[0]->expression.vtype]);
730 switch (exprs[0]->expression.vtype) {
732 if (exprs[1]->expression.vtype == TYPE_VECTOR)
734 if (CanConstFold(exprs[0], exprs[1]))
735 out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(1), ConstF(0)));
737 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
741 if (CanConstFold(exprs[0], exprs[1]))
742 out = (ast_expression*)parser_const_float(parser, ConstF(0) * ConstF(1));
744 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
748 if (exprs[1]->expression.vtype == TYPE_FLOAT)
750 if (CanConstFold(exprs[0], exprs[1]))
751 out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(0), ConstF(1)));
753 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
757 if (CanConstFold(exprs[0], exprs[1]))
758 out = (ast_expression*)parser_const_float(parser, vec3_mulvv(ConstV(0), ConstV(1)));
760 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
764 parseerror(parser, "invalid types used in expression: cannot multiply types %s and %s",
765 type_name[exprs[1]->expression.vtype],
766 type_name[exprs[0]->expression.vtype]);
771 if (NotSameType(TYPE_FLOAT)) {
772 parseerror(parser, "invalid types used in expression: cannot divide types %s and %s",
773 type_name[exprs[0]->expression.vtype],
774 type_name[exprs[1]->expression.vtype]);
777 if (CanConstFold(exprs[0], exprs[1]))
778 out = (ast_expression*)parser_const_float(parser, ConstF(0) / ConstF(1));
780 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
784 parseerror(parser, "qc does not have a modulo operator");
788 if (NotSameType(TYPE_FLOAT)) {
789 parseerror(parser, "invalid types used in expression: cannot perform bit operations between types %s and %s",
790 type_name[exprs[0]->expression.vtype],
791 type_name[exprs[1]->expression.vtype]);
794 if (CanConstFold(exprs[0], exprs[1]))
795 out = (ast_expression*)parser_const_float(parser,
796 (op->id == opid1('|') ? (float)( ((qcint)ConstF(0)) | ((qcint)ConstF(1)) ) :
797 (float)( ((qcint)ConstF(0)) & ((qcint)ConstF(1)) ) ));
799 out = (ast_expression*)ast_binary_new(ctx,
800 (op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
804 parseerror(parser, "TODO: bitxor");
809 case opid3('<','<','='):
810 case opid3('>','>','='):
811 parseerror(parser, "TODO: shifts");
815 generated_op += 1; /* INSTR_OR */
817 generated_op += INSTR_AND;
819 if (NotSameType(TYPE_FLOAT)) {
820 parseerror(parser, "invalid types used in expression: cannot perform logical operations between types %s and %s",
821 type_name[exprs[0]->expression.vtype],
822 type_name[exprs[1]->expression.vtype]);
823 parseerror(parser, "TODO: logical ops for arbitrary types using INSTR_NOT");
824 parseerror(parser, "TODO: optional early out");
828 if (opts_standard == COMPILER_GMQCC)
829 con_out("TODO: early out logic\n");
830 if (CanConstFold(exprs[0], exprs[1]))
831 out = (ast_expression*)parser_const_float(parser,
832 (generated_op == INSTR_OR ? (ConstF(0) || ConstF(1)) : (ConstF(0) && ConstF(1))));
834 out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
838 if (exprs[1]->expression.vtype != exprs[2]->expression.vtype) {
839 ast_type_to_string(exprs[1], ty1, sizeof(ty1));
840 ast_type_to_string(exprs[2], ty2, sizeof(ty2));
841 parseerror(parser, "iperands of ternary expression must have the same type, got %s and %s", ty1, ty2);
844 if (CanConstFold1(exprs[0]))
845 out = (ConstF(0) ? exprs[1] : exprs[2]);
847 out = (ast_expression*)ast_ternary_new(ctx, exprs[0], exprs[1], exprs[2]);
851 generated_op += 1; /* INSTR_GT */
853 generated_op += 1; /* INSTR_LT */
854 case opid2('>', '='):
855 generated_op += 1; /* INSTR_GE */
856 case opid2('<', '='):
857 generated_op += INSTR_LE;
858 if (NotSameType(TYPE_FLOAT)) {
859 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
860 type_name[exprs[0]->expression.vtype],
861 type_name[exprs[1]->expression.vtype]);
864 out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
866 case opid2('!', '='):
867 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
868 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
869 type_name[exprs[0]->expression.vtype],
870 type_name[exprs[1]->expression.vtype]);
873 out = (ast_expression*)ast_binary_new(ctx, type_ne_instr[exprs[0]->expression.vtype], exprs[0], exprs[1]);
875 case opid2('=', '='):
876 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
877 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
878 type_name[exprs[0]->expression.vtype],
879 type_name[exprs[1]->expression.vtype]);
882 out = (ast_expression*)ast_binary_new(ctx, type_eq_instr[exprs[0]->expression.vtype], exprs[0], exprs[1]);
886 if (ast_istype(exprs[0], ast_entfield)) {
887 ast_expression *field = ((ast_entfield*)exprs[0])->field;
888 if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
889 exprs[0]->expression.vtype == TYPE_FIELD &&
890 exprs[0]->expression.next->expression.vtype == TYPE_VECTOR)
892 assignop = type_storep_instr[TYPE_VECTOR];
895 assignop = type_storep_instr[exprs[0]->expression.vtype];
896 if (!ast_compare_type(field->expression.next, exprs[1])) {
897 ast_type_to_string(field->expression.next, ty1, sizeof(ty1));
898 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
899 if (opts_standard == COMPILER_QCC &&
900 field->expression.next->expression.vtype == TYPE_FUNCTION &&
901 exprs[1]->expression.vtype == TYPE_FUNCTION)
903 if (parsewarning(parser, WARN_ASSIGN_FUNCTION_TYPES,
904 "invalid types in assignment: cannot assign %s to %s", ty2, ty1))
910 parseerror(parser, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
915 if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
916 exprs[0]->expression.vtype == TYPE_FIELD &&
917 exprs[0]->expression.next->expression.vtype == TYPE_VECTOR)
919 assignop = type_store_instr[TYPE_VECTOR];
922 assignop = type_store_instr[exprs[0]->expression.vtype];
925 if (assignop == AINSTR_END) {
926 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
927 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
928 parseerror(parser, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
930 else if (!ast_compare_type(exprs[0], exprs[1])) {
931 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
932 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
933 if (opts_standard == COMPILER_QCC &&
934 exprs[0]->expression.vtype == TYPE_FUNCTION &&
935 exprs[1]->expression.vtype == TYPE_FUNCTION)
937 if (parsewarning(parser, WARN_ASSIGN_FUNCTION_TYPES,
938 "invalid types in assignment: cannot assign %s to %s", ty2, ty1))
944 parseerror(parser, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
947 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
948 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
950 out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
952 case opid3('+','+','P'):
953 case opid3('-','-','P'):
955 if (exprs[0]->expression.vtype != TYPE_FLOAT) {
956 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
957 parseerror(parser, "invalid type for prefix increment: %s", ty1);
960 if (op->id == opid3('+','+','P'))
964 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
965 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
967 if (ast_istype(exprs[0], ast_entfield)) {
968 out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
970 (ast_expression*)parser_const_float_1(parser));
972 out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
974 (ast_expression*)parser_const_float_1(parser));
977 case opid3('S','+','+'):
978 case opid3('S','-','-'):
980 if (exprs[0]->expression.vtype != TYPE_FLOAT) {
981 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
982 parseerror(parser, "invalid type for suffix increment: %s", ty1);
985 if (op->id == opid3('S','+','+')) {
992 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
993 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
995 if (ast_istype(exprs[0], ast_entfield)) {
996 out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
998 (ast_expression*)parser_const_float_1(parser));
1000 out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
1002 (ast_expression*)parser_const_float_1(parser));
1006 out = (ast_expression*)ast_binary_new(ctx, subop,
1008 (ast_expression*)parser_const_float_1(parser));
1010 case opid2('+','='):
1011 case opid2('-','='):
1012 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
1013 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
1015 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
1016 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
1017 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
1021 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
1022 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
1024 if (ast_istype(exprs[0], ast_entfield))
1025 assignop = type_storep_instr[exprs[0]->expression.vtype];
1027 assignop = type_store_instr[exprs[0]->expression.vtype];
1028 switch (exprs[0]->expression.vtype) {
1030 out = (ast_expression*)ast_binstore_new(ctx, assignop,
1031 (op->id == opid2('+','=') ? INSTR_ADD_F : INSTR_SUB_F),
1032 exprs[0], exprs[1]);
1035 out = (ast_expression*)ast_binstore_new(ctx, assignop,
1036 (op->id == opid2('+','=') ? INSTR_ADD_V : INSTR_SUB_V),
1037 exprs[0], exprs[1]);
1040 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
1041 type_name[exprs[0]->expression.vtype],
1042 type_name[exprs[1]->expression.vtype]);
1046 case opid2('*','='):
1047 case opid2('/','='):
1048 if (exprs[1]->expression.vtype != TYPE_FLOAT ||
1049 !(exprs[0]->expression.vtype == TYPE_FLOAT ||
1050 exprs[0]->expression.vtype == TYPE_VECTOR))
1052 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
1053 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
1054 parseerror(parser, "invalid types used in expression: %s and %s",
1058 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
1059 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
1061 if (ast_istype(exprs[0], ast_entfield))
1062 assignop = type_storep_instr[exprs[0]->expression.vtype];
1064 assignop = type_store_instr[exprs[0]->expression.vtype];
1065 switch (exprs[0]->expression.vtype) {
1067 out = (ast_expression*)ast_binstore_new(ctx, assignop,
1068 (op->id == opid2('*','=') ? INSTR_MUL_F : INSTR_DIV_F),
1069 exprs[0], exprs[1]);
1072 if (op->id == opid2('*','=')) {
1073 out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
1074 exprs[0], exprs[1]);
1076 /* there's no DIV_VF */
1077 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
1078 (ast_expression*)parser_const_float_1(parser),
1082 out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
1087 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
1088 type_name[exprs[0]->expression.vtype],
1089 type_name[exprs[1]->expression.vtype]);
1093 case opid2('&','='):
1094 case opid2('|','='):
1095 if (NotSameType(TYPE_FLOAT)) {
1096 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
1097 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
1098 parseerror(parser, "invalid types used in expression: %s and %s",
1102 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
1103 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
1105 if (ast_istype(exprs[0], ast_entfield))
1106 assignop = type_storep_instr[exprs[0]->expression.vtype];
1108 assignop = type_store_instr[exprs[0]->expression.vtype];
1109 out = (ast_expression*)ast_binstore_new(ctx, assignop,
1110 (op->id == opid2('&','=') ? INSTR_BITAND : INSTR_BITOR),
1111 exprs[0], exprs[1]);
1113 case opid3('&','~','='):
1114 /* This is like: a &= ~(b);
1115 * But QC has no bitwise-not, so we implement it as
1118 if (NotSameType(TYPE_FLOAT)) {
1119 ast_type_to_string(exprs[0], ty1, sizeof(ty1));
1120 ast_type_to_string(exprs[1], ty2, sizeof(ty2));
1121 parseerror(parser, "invalid types used in expression: %s and %s",
1125 if (ast_istype(exprs[0], ast_entfield))
1126 assignop = type_storep_instr[exprs[0]->expression.vtype];
1128 assignop = type_store_instr[exprs[0]->expression.vtype];
1129 out = (ast_expression*)ast_binary_new(ctx, INSTR_BITAND, exprs[0], exprs[1]);
1132 if (ast_istype(exprs[0], ast_value) && asvalue[0]->constant) {
1133 parseerror(parser, "assignment to constant `%s`", asvalue[0]->name);
1135 out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_SUB_F, exprs[0], out);
1141 parseerror(parser, "failed to apply operand %s", op->op);
1145 DEBUGSHUNTDO(con_out("applied %s\n", op->op));
1146 vec_push(sy->out, syexp(ctx, out));
1150 static bool parser_close_call(parser_t *parser, shunt *sy)
1152 /* was a function call */
1153 ast_expression *fun;
1159 vec_shrinkby(sy->ops, 1);
1160 fid = sy->ops[vec_size(sy->ops)].off;
1162 /* out[fid] is the function
1163 * everything above is parameters...
1164 * 0 params = nothing
1165 * 1 params = ast_expression
1169 if (vec_size(sy->out) < 1 || vec_size(sy->out) <= fid) {
1170 parseerror(parser, "internal error: function call needs function and parameter list...");
1174 fun = sy->out[fid].out;
1176 call = ast_call_new(sy->ops[vec_size(sy->ops)].ctx, fun);
1178 parseerror(parser, "out of memory");
1182 if (fid+1 == vec_size(sy->out)) {
1185 } else if (fid+2 == vec_size(sy->out)) {
1187 vec_shrinkby(sy->out, 1);
1188 params = sy->out[vec_size(sy->out)].block;
1192 vec_push(call->params, sy->out[vec_size(sy->out)].out);
1194 paramcount = vec_size(params->exprs);
1195 call->params = params->exprs;
1196 params->exprs = NULL;
1199 if (!ast_call_check_types(call))
1202 parseerror(parser, "invalid function call");
1206 /* overwrite fid, the function, with a call */
1207 sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
1209 if (fun->expression.vtype != TYPE_FUNCTION) {
1210 parseerror(parser, "not a function (%s)", type_name[fun->expression.vtype]);
1214 if (!fun->expression.next) {
1215 parseerror(parser, "could not determine function return type");
1218 if (vec_size(fun->expression.params) != paramcount &&
1219 !(fun->expression.variadic &&
1220 vec_size(fun->expression.params) < paramcount))
1223 const char *fewmany = (vec_size(fun->expression.params) > paramcount) ? "few" : "many";
1225 fval = (ast_istype(fun, ast_value) ? ((ast_value*)fun) : NULL);
1226 if (opts_standard == COMPILER_GMQCC)
1229 parseerror(parser, "too %s parameters for call to %s: expected %i, got %i\n"
1230 " -> `%s` has been declared here: %s:%i",
1231 fewmany, fval->name, (int)vec_size(fun->expression.params), (int)paramcount,
1232 fval->name, ast_ctx(fun).file, (int)ast_ctx(fun).line);
1234 parseerror(parser, "too %s parameters for function call: expected %i, got %i\n"
1235 " -> `%s` has been declared here: %s:%i",
1236 fewmany, fval->name, (int)vec_size(fun->expression.params), (int)paramcount,
1237 fval->name, ast_ctx(fun).file, (int)ast_ctx(fun).line);
1243 return !parsewarning(parser, WARN_TOO_FEW_PARAMETERS,
1244 "too %s parameters for call to %s: expected %i, got %i\n"
1245 " -> `%s` has been declared here: %s:%i",
1246 fewmany, fval->name, (int)vec_size(fun->expression.params), (int)paramcount,
1247 fval->name, ast_ctx(fun).file, (int)ast_ctx(fun).line);
1249 return !parsewarning(parser, WARN_TOO_FEW_PARAMETERS,
1250 "too %s parameters for function call: expected %i, got %i\n"
1251 " -> `%s` has been declared here: %s:%i",
1252 fewmany, fval->name, (int)vec_size(fun->expression.params), (int)paramcount,
1253 fval->name, ast_ctx(fun).file, (int)ast_ctx(fun).line);
1261 static bool parser_close_paren(parser_t *parser, shunt *sy, bool functions_only)
1263 if (!vec_size(sy->ops)) {
1264 parseerror(parser, "unmatched closing paren");
1267 /* this would for bit a + (x) because there are no operators inside (x)
1268 if (sy->ops[vec_size(sy->ops)-1].paren == 1) {
1269 parseerror(parser, "empty parenthesis expression");
1273 while (vec_size(sy->ops)) {
1274 if (sy->ops[vec_size(sy->ops)-1].paren == SY_PAREN_FUNC) {
1275 if (!parser_close_call(parser, sy))
1279 if (sy->ops[vec_size(sy->ops)-1].paren == SY_PAREN_EXPR) {
1280 vec_shrinkby(sy->ops, 1);
1281 return !functions_only;
1283 if (sy->ops[vec_size(sy->ops)-1].paren == SY_PAREN_INDEX) {
1286 /* pop off the parenthesis */
1287 vec_shrinkby(sy->ops, 1);
1288 /* then apply the index operator */
1289 if (!parser_sy_pop(parser, sy))
1293 if (!parser_sy_pop(parser, sy))
1299 static void parser_reclassify_token(parser_t *parser)
1302 for (i = 0; i < operator_count; ++i) {
1303 if (!strcmp(parser_tokval(parser), operators[i].op)) {
1304 parser->tok = TOKEN_OPERATOR;
1310 static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma)
1312 ast_expression *expr = NULL;
1314 bool wantop = false;
1315 bool gotmemberof = false;
1317 /* count the parens because an if starts with one, so the
1318 * end of a condition is an unmatched closing paren
1326 parser->lex->flags.noops = false;
1328 parser_reclassify_token(parser);
1333 gotmemberof = false;
1335 parser->memberof = 0;
1337 if (OPTS_FLAG(TRANSLATABLE_STRINGS) &&
1338 parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "_"))
1340 /* a translatable string */
1344 parseerror(parser, "expected operator or end of statement, got constant");
1348 parser->lex->flags.noops = true;
1349 if (!parser_next(parser) || parser->tok != '(') {
1350 parseerror(parser, "use _(\"string\") to create a translatable string constant");
1353 parser->lex->flags.noops = false;
1354 if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
1355 parseerror(parser, "expected a constant string in translatable-string extension");
1358 val = parser_const_string(parser, parser_tokval(parser), true);
1362 vec_push(sy.out, syexp(parser_ctx(parser), (ast_expression*)val));
1363 DEBUGSHUNTDO(con_out("push string\n"));
1365 if (!parser_next(parser) || parser->tok != ')') {
1366 parseerror(parser, "expected closing paren after translatable string");
1370 else if (parser->tok == TOKEN_IDENT)
1372 ast_expression *var;
1374 parseerror(parser, "expected operator or end of statement");
1379 if (opts_standard == COMPILER_GMQCC)
1381 if (parser->memberof == TYPE_ENTITY) {
1382 /* still get vars first since there could be a fieldpointer */
1383 var = parser_find_var(parser, parser_tokval(parser));
1385 var = parser_find_field(parser, parser_tokval(parser));
1387 else if (parser->memberof == TYPE_VECTOR)
1389 parseerror(parser, "TODO: implement effective vector member access");
1392 else if (parser->memberof) {
1393 parseerror(parser, "namespace for member not found");
1397 var = parser_find_var(parser, parser_tokval(parser));
1399 var = parser_find_var(parser, parser_tokval(parser));
1401 var = parser_find_field(parser, parser_tokval(parser));
1404 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
1407 if (ast_istype(var, ast_value))
1408 ((ast_value*)var)->uses++;
1409 vec_push(sy.out, syexp(parser_ctx(parser), var));
1410 DEBUGSHUNTDO(con_out("push %s\n", parser_tokval(parser)));
1412 else if (parser->tok == TOKEN_FLOATCONST) {
1415 parseerror(parser, "expected operator or end of statement, got constant");
1419 val = parser_const_float(parser, (parser_token(parser)->constval.f));
1422 vec_push(sy.out, syexp(parser_ctx(parser), (ast_expression*)val));
1423 DEBUGSHUNTDO(con_out("push %g\n", parser_token(parser)->constval.f));
1425 else if (parser->tok == TOKEN_INTCONST) {
1428 parseerror(parser, "expected operator or end of statement, got constant");
1432 val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
1435 vec_push(sy.out, syexp(parser_ctx(parser), (ast_expression*)val));
1436 DEBUGSHUNTDO(con_out("push %i\n", parser_token(parser)->constval.i));
1438 else if (parser->tok == TOKEN_STRINGCONST) {
1441 parseerror(parser, "expected operator or end of statement, got constant");
1445 val = parser_const_string(parser, parser_tokval(parser), false);
1448 vec_push(sy.out, syexp(parser_ctx(parser), (ast_expression*)val));
1449 DEBUGSHUNTDO(con_out("push string\n"));
1451 else if (parser->tok == TOKEN_VECTORCONST) {
1454 parseerror(parser, "expected operator or end of statement, got constant");
1458 val = parser_const_vector(parser, parser_token(parser)->constval.v);
1461 vec_push(sy.out, syexp(parser_ctx(parser), (ast_expression*)val));
1462 DEBUGSHUNTDO(con_out("push '%g %g %g'\n",
1463 parser_token(parser)->constval.v.x,
1464 parser_token(parser)->constval.v.y,
1465 parser_token(parser)->constval.v.z));
1467 else if (parser->tok == '(') {
1468 parseerror(parser, "internal error: '(' should be classified as operator");
1471 else if (parser->tok == '[') {
1472 parseerror(parser, "internal error: '[' should be classified as operator");
1475 else if (parser->tok == ')') {
1477 DEBUGSHUNTDO(con_out("do[op] )\n"));
1481 /* we do expect an operator next */
1482 /* closing an opening paren */
1483 if (!parser_close_paren(parser, &sy, false))
1486 DEBUGSHUNTDO(con_out("do[nop] )\n"));
1490 /* allowed for function calls */
1491 if (!parser_close_paren(parser, &sy, true))
1496 else if (parser->tok == ']') {
1498 parseerror(parser, "operand expected");
1502 if (!parser_close_paren(parser, &sy, false))
1506 else if (parser->tok != TOKEN_OPERATOR) {
1508 parseerror(parser, "expected operator or end of statement");
1515 /* classify the operator */
1516 const oper_info *op;
1517 const oper_info *olast = NULL;
1519 for (o = 0; o < operator_count; ++o) {
1520 if ((!(operators[o].flags & OP_PREFIX) == wantop) &&
1521 /* !(operators[o].flags & OP_SUFFIX) && / * remove this */
1522 !strcmp(parser_tokval(parser), operators[o].op))
1527 if (o == operator_count) {
1528 /* no operator found... must be the end of the statement */
1531 /* found an operator */
1534 /* when declaring variables, a comma starts a new variable */
1535 if (op->id == opid1(',') && !parens && stopatcomma) {
1536 /* fixup the token */
1541 /* a colon without a pervious question mark cannot be a ternary */
1542 if (!ternaries && op->id == opid2(':','?')) {
1547 if (vec_size(sy.ops) && !vec_last(sy.ops).paren)
1548 olast = &operators[vec_last(sy.ops).etype-1];
1551 (op->prec < olast->prec) ||
1552 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
1554 if (!parser_sy_pop(parser, &sy))
1556 if (vec_size(sy.ops) && !vec_last(sy.ops).paren)
1557 olast = &operators[vec_last(sy.ops).etype-1];
1562 if (op->id == opid1('.') && opts_standard == COMPILER_GMQCC) {
1563 /* for gmqcc standard: open up the namespace of the previous type */
1564 ast_expression *prevex = vec_last(sy.out).out;
1566 parseerror(parser, "unexpected member operator");
1569 if (prevex->expression.vtype == TYPE_ENTITY)
1570 parser->memberof = TYPE_ENTITY;
1571 else if (prevex->expression.vtype == TYPE_VECTOR)
1572 parser->memberof = TYPE_VECTOR;
1574 parseerror(parser, "type error: type has no members");
1580 if (op->id == opid1('(')) {
1582 size_t sycount = vec_size(sy.out);
1583 DEBUGSHUNTDO(con_out("push [op] (\n"));
1585 /* we expected an operator, this is the function-call operator */
1586 vec_push(sy.ops, syparen(parser_ctx(parser), SY_PAREN_FUNC, sycount-1));
1589 vec_push(sy.ops, syparen(parser_ctx(parser), SY_PAREN_EXPR, 0));
1590 DEBUGSHUNTDO(con_out("push [nop] (\n"));
1593 } else if (op->id == opid1('[')) {
1595 parseerror(parser, "unexpected array subscript");
1599 /* push both the operator and the paren, this makes life easier */
1600 vec_push(sy.ops, syop(parser_ctx(parser), op));
1601 vec_push(sy.ops, syparen(parser_ctx(parser), SY_PAREN_INDEX, 0));
1603 } else if (op->id == opid2('?',':')) {
1605 vec_push(sy.ops, syop(parser_ctx(parser), op));
1608 } else if (op->id == opid2(':','?')) {
1609 /* we don't push this operator */
1613 DEBUGSHUNTDO(con_out("push operator %s\n", op->op));
1614 vec_push(sy.ops, syop(parser_ctx(parser), op));
1615 wantop = !!(op->flags & OP_SUFFIX);
1618 if (!parser_next(parser)) {
1621 if (parser->tok == ';' ||
1622 (!parens && parser->tok == ']'))
1628 while (vec_size(sy.ops)) {
1629 if (!parser_sy_pop(parser, &sy))
1633 parser->lex->flags.noops = true;
1634 if (!vec_size(sy.out)) {
1635 parseerror(parser, "empty expression");
1638 expr = sy.out[0].out;
1641 DEBUGSHUNTDO(con_out("shunt done\n"));
1645 parser->lex->flags.noops = true;
1651 static ast_expression* parse_expression(parser_t *parser, bool stopatcomma)
1653 ast_expression *e = parse_expression_leave(parser, stopatcomma);
1656 if (!parser_next(parser)) {
1663 static void parser_enterblock(parser_t *parser)
1665 vec_push(parser->variables, util_htnew(PARSER_HT_SIZE));
1666 vec_push(parser->_blocklocals, vec_size(parser->_locals));
1667 vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
1668 vec_push(parser->_blocktypedefs, vec_size(parser->_typedefs));
1671 static bool parser_leaveblock(parser_t *parser)
1674 size_t locals, typedefs;
1676 if (vec_size(parser->variables) <= PARSER_HT_LOCALS) {
1677 parseerror(parser, "internal error: parser_leaveblock with no block");
1681 util_htdel(vec_last(parser->variables));
1682 vec_pop(parser->variables);
1683 if (!vec_size(parser->_blocklocals)) {
1684 parseerror(parser, "internal error: parser_leaveblock with no block (2)");
1688 locals = vec_last(parser->_blocklocals);
1689 vec_pop(parser->_blocklocals);
1690 while (vec_size(parser->_locals) != locals) {
1691 ast_expression *e = vec_last(parser->_locals);
1692 ast_value *v = (ast_value*)e;
1693 vec_pop(parser->_locals);
1694 if (ast_istype(e, ast_value) && !v->uses) {
1695 if (parsewarning(parser, WARN_UNUSED_VARIABLE, "unused variable: `%s`", v->name))
1700 typedefs = vec_last(parser->_blocktypedefs);
1701 while (vec_size(parser->_typedefs) != typedefs) {
1702 ast_delete(vec_last(parser->_typedefs));
1703 vec_pop(parser->_typedefs);
1705 util_htdel(vec_last(parser->typedefs));
1706 vec_pop(parser->typedefs);
1711 static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e)
1713 vec_push(parser->_locals, e);
1714 util_htset(vec_last(parser->variables), name, (void*)e);
1717 static bool parse_if(parser_t *parser, ast_block *block, ast_expression **out)
1720 ast_expression *cond, *ontrue, *onfalse = NULL;
1723 lex_ctx ctx = parser_ctx(parser);
1725 (void)block; /* not touching */
1727 /* skip the 'if', parse an optional 'not' and check for an opening paren */
1728 if (!parser_next(parser)) {
1729 parseerror(parser, "expected condition or 'not'");
1732 if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "not")) {
1734 if (!parser_next(parser)) {
1735 parseerror(parser, "expected condition in parenthesis");
1739 if (parser->tok != '(') {
1740 parseerror(parser, "expected 'if' condition in parenthesis");
1743 /* parse into the expression */
1744 if (!parser_next(parser)) {
1745 parseerror(parser, "expected 'if' condition after opening paren");
1748 /* parse the condition */
1749 cond = parse_expression_leave(parser, false);
1753 if (parser->tok != ')') {
1754 parseerror(parser, "expected closing paren after 'if' condition");
1758 /* parse into the 'then' branch */
1759 if (!parser_next(parser)) {
1760 parseerror(parser, "expected statement for on-true branch of 'if'");
1764 ontrue = parse_statement_or_block(parser);
1769 /* check for an else */
1770 if (!strcmp(parser_tokval(parser), "else")) {
1771 /* parse into the 'else' branch */
1772 if (!parser_next(parser)) {
1773 parseerror(parser, "expected on-false branch after 'else'");
1778 onfalse = parse_statement_or_block(parser);
1787 ifthen = ast_ifthen_new(ctx, cond, onfalse, ontrue);
1789 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
1790 *out = (ast_expression*)ifthen;
1794 static bool parse_while(parser_t *parser, ast_block *block, ast_expression **out)
1797 ast_expression *cond, *ontrue;
1799 lex_ctx ctx = parser_ctx(parser);
1801 (void)block; /* not touching */
1803 /* skip the 'while' and check for opening paren */
1804 if (!parser_next(parser) || parser->tok != '(') {
1805 parseerror(parser, "expected 'while' condition in parenthesis");
1808 /* parse into the expression */
1809 if (!parser_next(parser)) {
1810 parseerror(parser, "expected 'while' condition after opening paren");
1813 /* parse the condition */
1814 cond = parse_expression_leave(parser, false);
1818 if (parser->tok != ')') {
1819 parseerror(parser, "expected closing paren after 'while' condition");
1823 /* parse into the 'then' branch */
1824 if (!parser_next(parser)) {
1825 parseerror(parser, "expected while-loop body");
1829 ontrue = parse_statement_or_block(parser);
1835 aloop = ast_loop_new(ctx, NULL, cond, NULL, NULL, ontrue);
1836 *out = (ast_expression*)aloop;
1840 static bool parse_dowhile(parser_t *parser, ast_block *block, ast_expression **out)
1843 ast_expression *cond, *ontrue;
1845 lex_ctx ctx = parser_ctx(parser);
1847 (void)block; /* not touching */
1849 /* skip the 'do' and get the body */
1850 if (!parser_next(parser)) {
1851 parseerror(parser, "expected loop body");
1854 ontrue = parse_statement_or_block(parser);
1858 /* expect the "while" */
1859 if (parser->tok != TOKEN_KEYWORD ||
1860 strcmp(parser_tokval(parser), "while"))
1862 parseerror(parser, "expected 'while' and condition");
1867 /* skip the 'while' and check for opening paren */
1868 if (!parser_next(parser) || parser->tok != '(') {
1869 parseerror(parser, "expected 'while' condition in parenthesis");
1873 /* parse into the expression */
1874 if (!parser_next(parser)) {
1875 parseerror(parser, "expected 'while' condition after opening paren");
1879 /* parse the condition */
1880 cond = parse_expression_leave(parser, false);
1884 if (parser->tok != ')') {
1885 parseerror(parser, "expected closing paren after 'while' condition");
1891 if (!parser_next(parser) || parser->tok != ';') {
1892 parseerror(parser, "expected semicolon after condition");
1898 if (!parser_next(parser)) {
1899 parseerror(parser, "parse error");
1905 aloop = ast_loop_new(ctx, NULL, NULL, cond, NULL, ontrue);
1906 *out = (ast_expression*)aloop;
1910 static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
1913 ast_expression *initexpr, *cond, *increment, *ontrue;
1917 lex_ctx ctx = parser_ctx(parser);
1919 parser_enterblock(parser);
1926 /* skip the 'while' and check for opening paren */
1927 if (!parser_next(parser) || parser->tok != '(') {
1928 parseerror(parser, "expected 'for' expressions in parenthesis");
1931 /* parse into the expression */
1932 if (!parser_next(parser)) {
1933 parseerror(parser, "expected 'for' initializer after opening paren");
1938 if (parser->tok == TOKEN_IDENT)
1939 typevar = parser_find_typedef(parser, parser_tokval(parser), 0);
1941 if (typevar || parser->tok == TOKEN_TYPENAME) {
1942 if (opts_standard != COMPILER_GMQCC) {
1943 if (parsewarning(parser, WARN_EXTENSIONS,
1944 "current standard does not allow variable declarations in for-loop initializers"))
1947 if (!parse_variable(parser, block, true, CV_VAR, typevar))
1950 else if (parser->tok != ';')
1952 initexpr = parse_expression_leave(parser, false);
1957 /* move on to condition */
1958 if (parser->tok != ';') {
1959 parseerror(parser, "expected semicolon after for-loop initializer");
1962 if (!parser_next(parser)) {
1963 parseerror(parser, "expected for-loop condition");
1967 /* parse the condition */
1968 if (parser->tok != ';') {
1969 cond = parse_expression_leave(parser, false);
1974 /* move on to incrementor */
1975 if (parser->tok != ';') {
1976 parseerror(parser, "expected semicolon after for-loop initializer");
1979 if (!parser_next(parser)) {
1980 parseerror(parser, "expected for-loop condition");
1984 /* parse the incrementor */
1985 if (parser->tok != ')') {
1986 increment = parse_expression_leave(parser, false);
1989 if (!ast_side_effects(increment)) {
1990 if (genwarning(ast_ctx(increment), WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
1996 if (parser->tok != ')') {
1997 parseerror(parser, "expected closing paren after 'for-loop' incrementor");
2000 /* parse into the 'then' branch */
2001 if (!parser_next(parser)) {
2002 parseerror(parser, "expected for-loop body");
2005 ontrue = parse_statement_or_block(parser);
2010 aloop = ast_loop_new(ctx, initexpr, cond, NULL, increment, ontrue);
2011 *out = (ast_expression*)aloop;
2013 if (!parser_leaveblock(parser))
2017 if (initexpr) ast_delete(initexpr);
2018 if (cond) ast_delete(cond);
2019 if (increment) ast_delete(increment);
2020 (void)!parser_leaveblock(parser);
2024 static bool parse_return(parser_t *parser, ast_block *block, ast_expression **out)
2026 ast_expression *exp = NULL;
2027 ast_return *ret = NULL;
2028 ast_value *expected = parser->function->vtype;
2030 (void)block; /* not touching */
2032 if (!parser_next(parser)) {
2033 parseerror(parser, "expected return expression");
2037 if (parser->tok != ';') {
2038 exp = parse_expression(parser, false);
2042 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
2043 parseerror(parser, "return with invalid expression");
2046 ret = ast_return_new(exp->expression.node.context, exp);
2052 if (!parser_next(parser))
2053 parseerror(parser, "parse error");
2054 if (expected->expression.next->expression.vtype != TYPE_VOID) {
2055 if (opts_standard != COMPILER_GMQCC)
2056 (void)!parsewarning(parser, WARN_MISSING_RETURN_VALUES, "return without value");
2058 parseerror(parser, "return without value");
2060 ret = ast_return_new(parser_ctx(parser), NULL);
2062 *out = (ast_expression*)ret;
2066 static bool parse_break_continue(parser_t *parser, ast_block *block, ast_expression **out, bool is_continue)
2068 lex_ctx ctx = parser_ctx(parser);
2070 (void)block; /* not touching */
2072 if (!parser_next(parser) || parser->tok != ';') {
2073 parseerror(parser, "expected semicolon");
2077 if (!parser_next(parser))
2078 parseerror(parser, "parse error");
2080 *out = (ast_expression*)ast_breakcont_new(ctx, is_continue);
2084 static bool parse_switch(parser_t *parser, ast_block *block, ast_expression **out)
2086 ast_expression *operand;
2088 ast_switch *switchnode;
2089 ast_switch_case swcase;
2091 lex_ctx ctx = parser_ctx(parser);
2093 (void)block; /* not touching */
2095 /* parse over the opening paren */
2096 if (!parser_next(parser) || parser->tok != '(') {
2097 parseerror(parser, "expected switch operand in parenthesis");
2101 /* parse into the expression */
2102 if (!parser_next(parser)) {
2103 parseerror(parser, "expected switch operand");
2106 /* parse the operand */
2107 operand = parse_expression_leave(parser, false);
2111 switchnode = ast_switch_new(ctx, operand);
2114 if (parser->tok != ')') {
2115 ast_delete(switchnode);
2116 parseerror(parser, "expected closing paren after 'switch' operand");
2120 /* parse over the opening paren */
2121 if (!parser_next(parser) || parser->tok != '{') {
2122 ast_delete(switchnode);
2123 parseerror(parser, "expected list of cases");
2127 if (!parser_next(parser)) {
2128 ast_delete(switchnode);
2129 parseerror(parser, "expected 'case' or 'default'");
2134 while (parser->tok != '}') {
2135 ast_block *caseblock;
2137 if (parser->tok != TOKEN_KEYWORD) {
2138 ast_delete(switchnode);
2139 parseerror(parser, "expected 'case' or 'default'");
2142 if (!strcmp(parser_tokval(parser), "case")) {
2143 if (!parser_next(parser)) {
2144 ast_delete(switchnode);
2145 parseerror(parser, "expected expression for case");
2148 swcase.value = parse_expression_leave(parser, false);
2149 if (!swcase.value) {
2150 ast_delete(switchnode);
2151 parseerror(parser, "expected expression for case");
2154 if (!OPTS_FLAG(RELAXED_SWITCH)) {
2155 opval = (ast_value*)swcase.value;
2156 if (!ast_istype(swcase.value, ast_value) || !opval->constant) {
2157 parseerror(parser, "case on non-constant values need to be explicitly enabled via -frelaxed-switch");
2163 else if (!strcmp(parser_tokval(parser), "default")) {
2164 swcase.value = NULL;
2165 if (!parser_next(parser)) {
2166 ast_delete(switchnode);
2167 parseerror(parser, "expected colon");
2172 /* Now the colon and body */
2173 if (parser->tok != ':') {
2174 if (swcase.value) ast_unref(swcase.value);
2175 ast_delete(switchnode);
2176 parseerror(parser, "expected colon");
2180 if (!parser_next(parser)) {
2181 if (swcase.value) ast_unref(swcase.value);
2182 ast_delete(switchnode);
2183 parseerror(parser, "expected statements or case");
2186 caseblock = ast_block_new(parser_ctx(parser));
2188 if (swcase.value) ast_unref(swcase.value);
2189 ast_delete(switchnode);
2192 swcase.code = (ast_expression*)caseblock;
2193 vec_push(switchnode->cases, swcase);
2195 ast_expression *expr;
2196 if (parser->tok == '}')
2198 if (parser->tok == TOKEN_KEYWORD) {
2199 if (!strcmp(parser_tokval(parser), "case") ||
2200 !strcmp(parser_tokval(parser), "default"))
2205 if (!parse_statement(parser, caseblock, &expr, true)) {
2206 ast_delete(switchnode);
2211 ast_block_add_expr(caseblock, expr);
2216 if (parser->tok != '}') {
2217 ast_delete(switchnode);
2218 parseerror(parser, "expected closing paren of case list");
2221 if (!parser_next(parser)) {
2222 ast_delete(switchnode);
2223 parseerror(parser, "parse error after switch");
2226 *out = (ast_expression*)switchnode;
2230 static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases)
2232 ast_value *typevar = NULL;
2235 if (parser->tok == TOKEN_IDENT)
2236 typevar = parser_find_typedef(parser, parser_tokval(parser), 0);
2238 if (typevar || parser->tok == TOKEN_TYPENAME || parser->tok == '.')
2240 /* local variable */
2242 parseerror(parser, "cannot declare a variable from here");
2245 if (opts_standard == COMPILER_QCC) {
2246 if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
2249 if (!parse_variable(parser, block, false, CV_NONE, typevar))
2254 else if (parser->tok == TOKEN_KEYWORD)
2256 if (!strcmp(parser_tokval(parser), "local") ||
2257 !strcmp(parser_tokval(parser), "const"))
2259 int cvq = parser_tokval(parser)[0] == 'c' ? CV_CONST : CV_VAR;
2262 parseerror(parser, "cannot declare a local variable here");
2265 if (!parser_next(parser)) {
2266 parseerror(parser, "expected variable declaration");
2269 if (!parse_variable(parser, block, true, cvq, NULL))
2274 else if (!strcmp(parser_tokval(parser), "return"))
2276 return parse_return(parser, block, out);
2278 else if (!strcmp(parser_tokval(parser), "if"))
2280 return parse_if(parser, block, out);
2282 else if (!strcmp(parser_tokval(parser), "while"))
2284 return parse_while(parser, block, out);
2286 else if (!strcmp(parser_tokval(parser), "do"))
2288 return parse_dowhile(parser, block, out);
2290 else if (!strcmp(parser_tokval(parser), "for"))
2292 if (opts_standard == COMPILER_QCC) {
2293 if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
2296 return parse_for(parser, block, out);
2298 else if (!strcmp(parser_tokval(parser), "break"))
2300 return parse_break_continue(parser, block, out, false);
2302 else if (!strcmp(parser_tokval(parser), "continue"))
2304 return parse_break_continue(parser, block, out, true);
2306 else if (!strcmp(parser_tokval(parser), "switch"))
2308 return parse_switch(parser, block, out);
2310 else if (!strcmp(parser_tokval(parser), "case") ||
2311 !strcmp(parser_tokval(parser), "default"))
2314 parseerror(parser, "unexpected 'case' label");
2319 else if (!strcmp(parser_tokval(parser), "typedef"))
2321 if (!parser_next(parser)) {
2322 parseerror(parser, "expected type definition after 'typedef'");
2325 return parse_typedef(parser);
2327 parseerror(parser, "Unexpected keyword");
2330 else if (parser->tok == '{')
2333 inner = parse_block(parser, false);
2336 *out = (ast_expression*)inner;
2339 else if (parser->tok == ';')
2341 if (!parser_next(parser)) {
2342 parseerror(parser, "parse error after empty statement");
2349 ast_expression *exp = parse_expression(parser, false);
2353 if (!ast_side_effects(exp)) {
2354 if (genwarning(ast_ctx(exp), WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
2361 static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn)
2365 parser_enterblock(parser);
2367 if (!parser_next(parser)) { /* skip the '{' */
2368 parseerror(parser, "expected function body");
2372 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
2374 ast_expression *expr = NULL;
2375 if (parser->tok == '}')
2378 if (!parse_statement(parser, block, &expr, false)) {
2379 /* parseerror(parser, "parse error"); */
2385 ast_block_add_expr(block, expr);
2388 if (parser->tok != '}') {
2391 if (warnreturn && parser->function->vtype->expression.next->expression.vtype != TYPE_VOID)
2393 if (!vec_size(block->exprs) ||
2394 !ast_istype(vec_last(block->exprs), ast_return))
2396 if (parsewarning(parser, WARN_MISSING_RETURN_VALUES, "control reaches end of non-void function")) {
2402 (void)parser_next(parser);
2406 if (!parser_leaveblock(parser))
2408 return retval && !!block;
2411 static ast_block* parse_block(parser_t *parser, bool warnreturn)
2414 block = ast_block_new(parser_ctx(parser));
2417 if (!parse_block_into(parser, block, warnreturn)) {
2418 ast_block_delete(block);
2424 static ast_expression* parse_statement_or_block(parser_t *parser)
2426 ast_expression *expr = NULL;
2427 if (parser->tok == '{')
2428 return (ast_expression*)parse_block(parser, false);
2429 if (!parse_statement(parser, NULL, &expr, false))
2434 static bool create_vector_members(ast_value *var, ast_member **me)
2437 size_t len = strlen(var->name);
2439 for (i = 0; i < 3; ++i) {
2440 char *name = mem_a(len+3);
2441 memcpy(name, var->name, len);
2443 name[len+1] = 'x'+i;
2445 me[i] = ast_member_new(ast_ctx(var), (ast_expression*)var, i, name);
2454 do { ast_member_delete(me[--i]); } while(i);
2458 static bool parse_function_body(parser_t *parser, ast_value *var)
2460 ast_block *block = NULL;
2465 ast_expression *framenum = NULL;
2466 ast_expression *nextthink = NULL;
2467 /* None of the following have to be deleted */
2468 ast_expression *fld_think = NULL, *fld_nextthink = NULL, *fld_frame = NULL;
2469 ast_expression *gbl_time = NULL, *gbl_self = NULL;
2470 bool has_frame_think;
2474 has_frame_think = false;
2475 old = parser->function;
2477 if (var->expression.variadic) {
2478 if (parsewarning(parser, WARN_VARIADIC_FUNCTION,
2479 "variadic function with implementation will not be able to access additional parameters"))
2485 if (parser->tok == '[') {
2486 /* got a frame definition: [ framenum, nextthink ]
2487 * this translates to:
2488 * self.frame = framenum;
2489 * self.nextthink = time + 0.1;
2490 * self.think = nextthink;
2494 fld_think = parser_find_field(parser, "think");
2495 fld_nextthink = parser_find_field(parser, "nextthink");
2496 fld_frame = parser_find_field(parser, "frame");
2497 if (!fld_think || !fld_nextthink || !fld_frame) {
2498 parseerror(parser, "cannot use [frame,think] notation without the required fields");
2499 parseerror(parser, "please declare the following entityfields: `frame`, `think`, `nextthink`");
2502 gbl_time = parser_find_global(parser, "time");
2503 gbl_self = parser_find_global(parser, "self");
2504 if (!gbl_time || !gbl_self) {
2505 parseerror(parser, "cannot use [frame,think] notation without the required globals");
2506 parseerror(parser, "please declare the following globals: `time`, `self`");
2510 if (!parser_next(parser))
2513 framenum = parse_expression_leave(parser, true);
2515 parseerror(parser, "expected a framenumber constant in[frame,think] notation");
2518 if (!ast_istype(framenum, ast_value) || !( (ast_value*)framenum )->hasvalue) {
2519 ast_unref(framenum);
2520 parseerror(parser, "framenumber in [frame,think] notation must be a constant");
2524 if (parser->tok != ',') {
2525 ast_unref(framenum);
2526 parseerror(parser, "expected comma after frame number in [frame,think] notation");
2527 parseerror(parser, "Got a %i\n", parser->tok);
2531 if (!parser_next(parser)) {
2532 ast_unref(framenum);
2536 if (parser->tok == TOKEN_IDENT && !parser_find_var(parser, parser_tokval(parser)))
2538 /* qc allows the use of not-yet-declared functions here
2539 * - this automatically creates a prototype */
2540 ast_value *thinkfunc;
2541 ast_expression *functype = fld_think->expression.next;
2543 thinkfunc = ast_value_new(parser_ctx(parser), parser_tokval(parser), functype->expression.vtype);
2544 if (!thinkfunc || !ast_type_adopt(thinkfunc, functype)) {
2545 ast_unref(framenum);
2546 parseerror(parser, "failed to create implicit prototype for `%s`", parser_tokval(parser));
2550 if (!parser_next(parser)) {
2551 ast_unref(framenum);
2552 ast_delete(thinkfunc);
2556 vec_push(parser->globals, (ast_expression*)thinkfunc);
2557 util_htset(parser->htglobals, thinkfunc->name, thinkfunc);
2558 nextthink = (ast_expression*)thinkfunc;
2561 nextthink = parse_expression_leave(parser, true);
2563 ast_unref(framenum);
2564 parseerror(parser, "expected a think-function in [frame,think] notation");
2569 if (!ast_istype(nextthink, ast_value)) {
2570 parseerror(parser, "think-function in [frame,think] notation must be a constant");
2574 if (retval && parser->tok != ']') {
2575 parseerror(parser, "expected closing `]` for [frame,think] notation");
2579 if (retval && !parser_next(parser)) {
2583 if (retval && parser->tok != '{') {
2584 parseerror(parser, "a function body has to be declared after a [frame,think] declaration");
2589 ast_unref(nextthink);
2590 ast_unref(framenum);
2594 has_frame_think = true;
2597 block = ast_block_new(parser_ctx(parser));
2599 parseerror(parser, "failed to allocate block");
2600 if (has_frame_think) {
2601 ast_unref(nextthink);
2602 ast_unref(framenum);
2607 if (has_frame_think) {
2609 ast_expression *self_frame;
2610 ast_expression *self_nextthink;
2611 ast_expression *self_think;
2612 ast_expression *time_plus_1;
2613 ast_store *store_frame;
2614 ast_store *store_nextthink;
2615 ast_store *store_think;
2617 ctx = parser_ctx(parser);
2618 self_frame = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_frame);
2619 self_nextthink = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_nextthink);
2620 self_think = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_think);
2622 time_plus_1 = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F,
2623 gbl_time, (ast_expression*)parser_const_float(parser, 0.1));
2625 if (!self_frame || !self_nextthink || !self_think || !time_plus_1) {
2626 if (self_frame) ast_delete(self_frame);
2627 if (self_nextthink) ast_delete(self_nextthink);
2628 if (self_think) ast_delete(self_think);
2629 if (time_plus_1) ast_delete(time_plus_1);
2635 store_frame = ast_store_new(ctx, INSTR_STOREP_F, self_frame, framenum);
2636 store_nextthink = ast_store_new(ctx, INSTR_STOREP_F, self_nextthink, time_plus_1);
2637 store_think = ast_store_new(ctx, INSTR_STOREP_FNC, self_think, nextthink);
2640 ast_delete(self_frame);
2643 if (!store_nextthink) {
2644 ast_delete(self_nextthink);
2648 ast_delete(self_think);
2652 if (store_frame) ast_delete(store_frame);
2653 if (store_nextthink) ast_delete(store_nextthink);
2654 if (store_think) ast_delete(store_think);
2657 ast_block_add_expr(block, (ast_expression*)store_frame);
2658 ast_block_add_expr(block, (ast_expression*)store_nextthink);
2659 ast_block_add_expr(block, (ast_expression*)store_think);
2663 parseerror(parser, "failed to generate code for [frame,think]");
2664 ast_unref(nextthink);
2665 ast_unref(framenum);
2671 parser_enterblock(parser);
2673 for (parami = 0; parami < vec_size(var->expression.params); ++parami) {
2675 ast_value *param = var->expression.params[parami];
2678 if (param->expression.vtype != TYPE_VECTOR &&
2679 (param->expression.vtype != TYPE_FIELD ||
2680 param->expression.next->expression.vtype != TYPE_VECTOR))
2685 if (!create_vector_members(param, me)) {
2686 ast_block_delete(block);
2690 for (e = 0; e < 3; ++e) {
2691 parser_addlocal(parser, me[e]->name, (ast_expression*)me[e]);
2692 ast_block_collect(block, (ast_expression*)me[e]);
2696 func = ast_function_new(ast_ctx(var), var->name, var);
2698 parseerror(parser, "failed to allocate function for `%s`", var->name);
2699 ast_block_delete(block);
2702 vec_push(parser->functions, func);
2704 parser->function = func;
2705 if (!parse_block_into(parser, block, true)) {
2706 ast_block_delete(block);
2710 vec_push(func->blocks, block);
2712 parser->function = old;
2713 if (!parser_leaveblock(parser))
2715 if (vec_size(parser->variables) != PARSER_HT_LOCALS) {
2716 parseerror(parser, "internal error: local scopes left");
2720 if (parser->tok == ';')
2721 return parser_next(parser);
2722 else if (opts_standard == COMPILER_QCC)
2723 parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
2727 vec_pop(parser->functions);
2728 ast_function_delete(func);
2729 var->constval.vfunc = NULL;
2732 (void)!parser_leaveblock(parser);
2733 parser->function = old;
2737 static ast_expression *array_accessor_split(
2742 ast_expression *left,
2743 ast_expression *right
2749 lex_ctx ctx = ast_ctx(array);
2751 if (!left || !right) {
2752 if (left) ast_delete(left);
2753 if (right) ast_delete(right);
2757 cmp = ast_binary_new(ctx, INSTR_LT,
2758 (ast_expression*)index,
2759 (ast_expression*)parser_const_float(parser, middle));
2763 parseerror(parser, "internal error: failed to create comparison for array setter");
2767 ifthen = ast_ifthen_new(ctx, (ast_expression*)cmp, left, right);
2769 ast_delete(cmp); /* will delete left and right */
2770 parseerror(parser, "internal error: failed to create conditional jump for array setter");
2774 return (ast_expression*)ifthen;
2777 static ast_expression *array_setter_node(parser_t *parser, ast_value *array, ast_value *index, ast_value *value, size_t from, size_t afterend)
2779 lex_ctx ctx = ast_ctx(array);
2781 if (from+1 == afterend) {
2782 /* set this value */
2785 ast_array_index *subscript;
2787 int assignop = type_store_instr[value->expression.vtype];
2789 if (value->expression.vtype == TYPE_FIELD && value->expression.next->expression.vtype == TYPE_VECTOR)
2790 assignop = INSTR_STORE_V;
2792 subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)parser_const_float(parser, from));
2796 st = ast_store_new(ctx, assignop, (ast_expression*)subscript, (ast_expression*)value);
2798 ast_delete(subscript);
2802 block = ast_block_new(ctx);
2808 ast_block_add_expr(block, (ast_expression*)st);
2810 ret = ast_return_new(ctx, NULL);
2816 ast_block_add_expr(block, (ast_expression*)ret);
2818 return (ast_expression*)block;
2820 ast_expression *left, *right;
2821 size_t diff = afterend - from;
2822 size_t middle = from + diff/2;
2823 left = array_setter_node(parser, array, index, value, from, middle);
2824 right = array_setter_node(parser, array, index, value, middle, afterend);
2825 return array_accessor_split(parser, array, index, middle, left, right);
2829 static ast_expression *array_field_setter_node(
2838 lex_ctx ctx = ast_ctx(array);
2840 if (from+1 == afterend) {
2841 /* set this value */
2844 ast_entfield *entfield;
2845 ast_array_index *subscript;
2847 int assignop = type_storep_instr[value->expression.vtype];
2849 if (value->expression.vtype == TYPE_FIELD && value->expression.next->expression.vtype == TYPE_VECTOR)
2850 assignop = INSTR_STOREP_V;
2852 subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)parser_const_float(parser, from));
2856 entfield = ast_entfield_new_force(ctx,
2857 (ast_expression*)entity,
2858 (ast_expression*)subscript,
2859 (ast_expression*)subscript);
2861 ast_delete(subscript);
2865 st = ast_store_new(ctx, assignop, (ast_expression*)entfield, (ast_expression*)value);
2867 ast_delete(entfield);
2871 block = ast_block_new(ctx);
2877 ast_block_add_expr(block, (ast_expression*)st);
2879 ret = ast_return_new(ctx, NULL);
2885 ast_block_add_expr(block, (ast_expression*)ret);
2887 return (ast_expression*)block;
2889 ast_expression *left, *right;
2890 size_t diff = afterend - from;
2891 size_t middle = from + diff/2;
2892 left = array_field_setter_node(parser, array, entity, index, value, from, middle);
2893 right = array_field_setter_node(parser, array, entity, index, value, middle, afterend);
2894 return array_accessor_split(parser, array, index, middle, left, right);
2898 static ast_expression *array_getter_node(parser_t *parser, ast_value *array, ast_value *index, size_t from, size_t afterend)
2900 lex_ctx ctx = ast_ctx(array);
2902 if (from+1 == afterend) {
2904 ast_array_index *subscript;
2906 subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)parser_const_float(parser, from));
2910 ret = ast_return_new(ctx, (ast_expression*)subscript);
2912 ast_delete(subscript);
2916 return (ast_expression*)ret;
2918 ast_expression *left, *right;
2919 size_t diff = afterend - from;
2920 size_t middle = from + diff/2;
2921 left = array_getter_node(parser, array, index, from, middle);
2922 right = array_getter_node(parser, array, index, middle, afterend);
2923 return array_accessor_split(parser, array, index, middle, left, right);
2927 static bool parser_create_array_accessor(parser_t *parser, ast_value *array, const char *funcname, ast_value **out)
2929 ast_function *func = NULL;
2930 ast_value *fval = NULL;
2931 ast_block *body = NULL;
2933 fval = ast_value_new(ast_ctx(array), funcname, TYPE_FUNCTION);
2935 parseerror(parser, "failed to create accessor function value");
2939 func = ast_function_new(ast_ctx(array), funcname, fval);
2942 parseerror(parser, "failed to create accessor function node");
2946 body = ast_block_new(ast_ctx(array));
2948 parseerror(parser, "failed to create block for array accessor");
2954 vec_push(func->blocks, body);
2957 vec_push(parser->accessors, fval);
2962 static bool parser_create_array_setter(parser_t *parser, ast_value *array, const char *funcname)
2964 ast_expression *root = NULL;
2965 ast_value *index = NULL;
2966 ast_value *value = NULL;
2970 if (!ast_istype(array->expression.next, ast_value)) {
2971 parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
2975 if (!parser_create_array_accessor(parser, array, funcname, &fval))
2977 func = fval->constval.vfunc;
2978 fval->expression.next = (ast_expression*)ast_value_new(ast_ctx(array), "<void>", TYPE_VOID);
2980 index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
2981 value = ast_value_copy((ast_value*)array->expression.next);
2983 if (!index || !value) {
2984 parseerror(parser, "failed to create locals for array accessor");
2987 (void)!ast_value_set_name(value, "value"); /* not important */
2988 vec_push(fval->expression.params, index);
2989 vec_push(fval->expression.params, value);
2991 root = array_setter_node(parser, array, index, value, 0, array->expression.count);
2993 parseerror(parser, "failed to build accessor search tree");
2997 ast_block_add_expr(func->blocks[0], root);
2998 array->setter = fval;
3001 if (index) ast_delete(index);
3002 if (value) ast_delete(value);
3003 if (root) ast_delete(root);
3009 static bool parser_create_array_field_setter(parser_t *parser, ast_value *array, const char *funcname)
3011 ast_expression *root = NULL;
3012 ast_value *entity = NULL;
3013 ast_value *index = NULL;
3014 ast_value *value = NULL;
3018 if (!ast_istype(array->expression.next, ast_value)) {
3019 parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
3023 if (!parser_create_array_accessor(parser, array, funcname, &fval))
3025 func = fval->constval.vfunc;
3026 fval->expression.next = (ast_expression*)ast_value_new(ast_ctx(array), "<void>", TYPE_VOID);
3028 entity = ast_value_new(ast_ctx(array), "entity", TYPE_ENTITY);
3029 index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
3030 value = ast_value_copy((ast_value*)array->expression.next);
3031 if (!entity || !index || !value) {
3032 parseerror(parser, "failed to create locals for array accessor");
3035 (void)!ast_value_set_name(value, "value"); /* not important */
3036 vec_push(fval->expression.params, entity);
3037 vec_push(fval->expression.params, index);
3038 vec_push(fval->expression.params, value);
3040 root = array_field_setter_node(parser, array, entity, index, value, 0, array->expression.count);
3042 parseerror(parser, "failed to build accessor search tree");
3046 ast_block_add_expr(func->blocks[0], root);
3047 array->setter = fval;
3050 if (entity) ast_delete(entity);
3051 if (index) ast_delete(index);
3052 if (value) ast_delete(value);
3053 if (root) ast_delete(root);
3059 static bool parser_create_array_getter(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname)
3061 ast_expression *root = NULL;
3062 ast_value *index = NULL;
3066 /* NOTE: checking array->expression.next rather than elemtype since
3067 * for fields elemtype is a temporary fieldtype.
3069 if (!ast_istype(array->expression.next, ast_value)) {
3070 parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
3074 if (!parser_create_array_accessor(parser, array, funcname, &fval))
3076 func = fval->constval.vfunc;
3077 fval->expression.next = ast_type_copy(ast_ctx(array), elemtype);
3079 index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
3082 parseerror(parser, "failed to create locals for array accessor");
3085 vec_push(fval->expression.params, index);
3087 root = array_getter_node(parser, array, index, 0, array->expression.count);
3089 parseerror(parser, "failed to build accessor search tree");
3093 ast_block_add_expr(func->blocks[0], root);
3094 array->getter = fval;
3097 if (index) ast_delete(index);
3098 if (root) ast_delete(root);
3104 static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef);
3105 static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
3113 bool variadic = false;
3115 ctx = parser_ctx(parser);
3117 /* for the sake of less code we parse-in in this function */
3118 if (!parser_next(parser)) {
3119 parseerror(parser, "expected parameter list");
3125 /* parse variables until we hit a closing paren */
3126 while (parser->tok != ')') {
3128 /* there must be commas between them */
3129 if (parser->tok != ',') {
3130 parseerror(parser, "expected comma or end of parameter list");
3133 if (!parser_next(parser)) {
3134 parseerror(parser, "expected parameter");
3140 if (parser->tok == TOKEN_DOTS) {
3141 /* '...' indicates a varargs function */
3143 if (!parser_next(parser)) {
3144 parseerror(parser, "expected parameter");
3147 if (parser->tok != ')') {
3148 parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
3154 /* for anything else just parse a typename */
3155 param = parse_typename(parser, NULL, NULL);
3158 vec_push(params, param);
3159 if (param->expression.vtype >= TYPE_VARIANT) {
3160 char typename[1024];
3161 ast_type_to_string((ast_expression*)param, typename, sizeof(typename));
3162 parseerror(parser, "type not supported as part of a parameter list: %s", typename);
3168 if (vec_size(params) == 1 && params[0]->expression.vtype == TYPE_VOID)
3172 if (vec_size(params) > 8 && opts_standard == COMPILER_QCC)
3173 (void)!parsewarning(parser, WARN_EXTENSIONS, "more than 8 parameters are not supported by this standard");
3176 if (!parser_next(parser)) {
3177 parseerror(parser, "parse error after typename");
3181 /* now turn 'var' into a function type */
3182 fval = ast_value_new(ctx, "<type()>", TYPE_FUNCTION);
3183 fval->expression.next = (ast_expression*)var;
3184 fval->expression.variadic = variadic;
3187 var->expression.params = params;
3194 for (i = 0; i < vec_size(params); ++i)
3195 ast_delete(params[i]);
3200 static ast_value *parse_arraysize(parser_t *parser, ast_value *var)
3202 ast_expression *cexp;
3203 ast_value *cval, *tmp;
3206 ctx = parser_ctx(parser);
3208 if (!parser_next(parser)) {
3210 parseerror(parser, "expected array-size");
3214 cexp = parse_expression_leave(parser, true);
3216 if (!cexp || !ast_istype(cexp, ast_value)) {
3220 parseerror(parser, "expected array-size as constant positive integer");
3223 cval = (ast_value*)cexp;
3225 tmp = ast_value_new(ctx, "<type[]>", TYPE_ARRAY);
3226 tmp->expression.next = (ast_expression*)var;
3229 if (cval->expression.vtype == TYPE_INTEGER)
3230 tmp->expression.count = cval->constval.vint;
3231 else if (cval->expression.vtype == TYPE_FLOAT)
3232 tmp->expression.count = cval->constval.vfloat;
3236 parseerror(parser, "array-size must be a positive integer constant");
3241 if (parser->tok != ']') {
3243 parseerror(parser, "expected ']' after array-size");
3246 if (!parser_next(parser)) {
3248 parseerror(parser, "error after parsing array size");
3254 /* Parse a complete typename.
3255 * for single-variables (ie. function parameters or typedefs) storebase should be NULL
3256 * but when parsing variables separated by comma
3257 * 'storebase' should point to where the base-type should be kept.
3258 * The base type makes up every bit of type information which comes *before* the
3261 * The following will be parsed in its entirety:
3263 * The 'basetype' in this case is 'void()'
3264 * and if there's a comma after it, say:
3266 * then the type-information 'void()' can be stored in 'storebase'
3268 static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef)
3270 ast_value *var, *tmp;
3273 const char *name = NULL;
3274 bool isfield = false;
3275 bool wasarray = false;
3276 size_t morefields = 0;
3278 ctx = parser_ctx(parser);
3280 /* types may start with a dot */
3281 if (parser->tok == '.') {
3283 /* if we parsed a dot we need a typename now */
3284 if (!parser_next(parser)) {
3285 parseerror(parser, "expected typename for field definition");
3289 /* Further dots are handled seperately because they won't be part of the
3292 while (parser->tok == '.') {
3294 if (!parser_next(parser)) {
3295 parseerror(parser, "expected typename for field definition");
3300 if (parser->tok == TOKEN_IDENT)
3301 cached_typedef = parser_find_typedef(parser, parser_tokval(parser), 0);
3302 if (!cached_typedef && parser->tok != TOKEN_TYPENAME) {
3303 parseerror(parser, "expected typename");
3308 /* generate the basic type value */
3309 if (cached_typedef) {
3310 var = ast_value_copy(cached_typedef);
3311 ast_value_set_name(var, "<type(from_def)>");
3313 var = ast_value_new(ctx, "<type>", parser_token(parser)->constval.t);
3315 for (; morefields; --morefields) {
3316 tmp = ast_value_new(ctx, "<.type>", TYPE_FIELD);
3317 tmp->expression.next = (ast_expression*)var;
3321 /* do not yet turn into a field - remember:
3322 * .void() foo; is a field too
3323 * .void()() foo; is a function
3327 if (!parser_next(parser)) {
3329 parseerror(parser, "parse error after typename");
3333 /* an opening paren now starts the parameter-list of a function
3334 * this is where original-QC has parameter lists.
3335 * We allow a single parameter list here.
3336 * Much like fteqcc we don't allow `float()() x`
3338 if (parser->tok == '(') {
3339 var = parse_parameter_list(parser, var);
3344 /* store the base if requested */
3346 *storebase = ast_value_copy(var);
3348 tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
3349 tmp->expression.next = (ast_expression*)*storebase;
3354 /* there may be a name now */
3355 if (parser->tok == TOKEN_IDENT) {
3356 name = util_strdup(parser_tokval(parser));
3358 if (!parser_next(parser)) {
3360 parseerror(parser, "error after variable or field declaration");
3365 /* now this may be an array */
3366 if (parser->tok == '[') {
3368 var = parse_arraysize(parser, var);
3373 /* This is the point where we can turn it into a field */
3375 /* turn it into a field if desired */
3376 tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
3377 tmp->expression.next = (ast_expression*)var;
3381 /* now there may be function parens again */
3382 if (parser->tok == '(' && opts_standard == COMPILER_QCC)
3383 parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
3384 if (parser->tok == '(' && wasarray)
3385 parseerror(parser, "arrays as part of a return type is not supported");
3386 while (parser->tok == '(') {
3387 var = parse_parameter_list(parser, var);
3396 /* finally name it */
3398 if (!ast_value_set_name(var, name)) {
3400 parseerror(parser, "internal error: failed to set name");
3403 /* free the name, ast_value_set_name duplicates */
3410 static bool parse_typedef(parser_t *parser)
3412 ast_value *typevar, *oldtype;
3413 ast_expression *old;
3415 typevar = parse_typename(parser, NULL, NULL);
3420 if ( (old = parser_find_var(parser, typevar->name)) ) {
3421 parseerror(parser, "cannot define a type with the same name as a variable: %s\n"
3422 " -> `%s` has been declared here: %s:%i",
3423 typevar->name, ast_ctx(old).file, ast_ctx(old).line);
3424 ast_delete(typevar);
3428 if ( (oldtype = parser_find_typedef(parser, typevar->name, vec_last(parser->_blocktypedefs))) ) {
3429 parseerror(parser, "type `%s` has already been declared here: %s:%i",
3430 typevar->name, ast_ctx(oldtype).file, ast_ctx(oldtype).line);
3431 ast_delete(typevar);
3435 vec_push(parser->_typedefs, typevar);
3436 util_htset(vec_last(parser->typedefs), typevar->name, typevar);
3438 if (parser->tok != ';') {
3439 parseerror(parser, "expected semicolon after typedef");
3442 if (!parser_next(parser)) {
3443 parseerror(parser, "parse error after typedef");
3450 static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int is_const_var, ast_value *cached_typedef)
3454 ast_expression *old;
3458 ast_value *basetype = NULL;
3460 bool isparam = false;
3461 bool isvector = false;
3462 bool cleanvar = true;
3463 bool wasarray = false;
3467 /* get the first complete variable */
3468 var = parse_typename(parser, &basetype, cached_typedef);
3471 ast_delete(basetype);
3479 /* Part 0: finish the type */
3480 if (parser->tok == '(') {
3481 if (opts_standard == COMPILER_QCC)
3482 parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
3483 var = parse_parameter_list(parser, var);
3489 /* we only allow 1-dimensional arrays */
3490 if (parser->tok == '[') {
3492 var = parse_arraysize(parser, var);
3498 if (parser->tok == '(' && wasarray) {
3499 parseerror(parser, "arrays as part of a return type is not supported");
3500 /* we'll still parse the type completely for now */
3502 /* for functions returning functions */
3503 while (parser->tok == '(') {
3504 if (opts_standard == COMPILER_QCC)
3505 parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
3506 var = parse_parameter_list(parser, var);
3513 if (is_const_var == CV_CONST)
3514 var->constant = true;
3517 * check for validity: (end_sys_..., multiple-definitions, prototypes, ...)
3518 * Also: if there was a prototype, `var` will be deleted and set to `proto` which
3519 * is then filled with the previous definition and the parameter-names replaced.
3522 /* Deal with end_sys_ vars */
3524 if (!strcmp(var->name, "end_sys_globals")) {
3525 parser->crc_globals = vec_size(parser->globals);
3528 else if (!strcmp(var->name, "end_sys_fields")) {
3529 parser->crc_fields = vec_size(parser->fields);
3532 if (was_end && var->expression.vtype == TYPE_FIELD) {
3533 if (parsewarning(parser, WARN_END_SYS_FIELDS,
3534 "global '%s' hint should not be a field",
3535 parser_tokval(parser)))
3542 if (!nofields && var->expression.vtype == TYPE_FIELD)
3544 /* deal with field declarations */
3545 old = parser_find_field(parser, var->name);
3547 if (parsewarning(parser, WARN_FIELD_REDECLARED, "field `%s` already declared here: %s:%i",
3548 var->name, ast_ctx(old).file, (int)ast_ctx(old).line))
3557 parseerror(parser, "field `%s` already declared here: %s:%i",
3558 var->name, ast_ctx(old).file, ast_ctx(old).line);
3563 if (opts_standard == COMPILER_QCC &&
3564 (old = parser_find_global(parser, var->name)))
3566 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
3567 parseerror(parser, "field `%s` already declared here: %s:%i",
3568 var->name, ast_ctx(old).file, ast_ctx(old).line);
3575 /* deal with other globals */
3576 old = parser_find_global(parser, var->name);
3577 if (old && var->expression.vtype == TYPE_FUNCTION && old->expression.vtype == TYPE_FUNCTION)
3579 /* This is a function which had a prototype */
3580 if (!ast_istype(old, ast_value)) {
3581 parseerror(parser, "internal error: prototype is not an ast_value");
3585 proto = (ast_value*)old;
3586 if (!ast_compare_type((ast_expression*)proto, (ast_expression*)var)) {
3587 parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
3589 ast_ctx(proto).file, ast_ctx(proto).line);
3593 /* we need the new parameter-names */
3594 for (i = 0; i < vec_size(proto->expression.params); ++i)
3595 ast_value_set_name(proto->expression.params[i], var->expression.params[i]->name);
3603 if (opts_standard == COMPILER_GMQCC) {
3604 parseerror(parser, "global `%s` already declared here: %s:%i",
3605 var->name, ast_ctx(old).file, ast_ctx(old).line);
3609 if (parsewarning(parser, WARN_DOUBLE_DECLARATION,
3610 "global `%s` already declared here: %s:%i",
3611 var->name, ast_ctx(old).file, ast_ctx(old).line))
3618 if (opts_standard == COMPILER_QCC &&
3619 (old = parser_find_field(parser, var->name)))
3621 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
3622 parseerror(parser, "global `%s` already declared here: %s:%i",
3623 var->name, ast_ctx(old).file, ast_ctx(old).line);
3630 else /* it's not a global */
3632 old = parser_find_local(parser, var->name, vec_size(parser->variables)-1, &isparam);
3633 if (old && !isparam) {
3634 parseerror(parser, "local `%s` already declared here: %s:%i",
3635 var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
3639 old = parser_find_local(parser, var->name, 0, &isparam);
3640 if (old && isparam) {
3641 if (parsewarning(parser, WARN_LOCAL_SHADOWS,
3642 "local `%s` is shadowing a parameter", var->name))
3644 parseerror(parser, "local `%s` already declared here: %s:%i",
3645 var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
3649 if (opts_standard != COMPILER_GMQCC) {
3658 * Create the global/local, and deal with vector types.
3661 if (var->expression.vtype == TYPE_VECTOR)
3663 else if (var->expression.vtype == TYPE_FIELD &&
3664 var->expression.next->expression.vtype == TYPE_VECTOR)
3668 if (!create_vector_members(var, me)) {
3675 /* deal with global variables, fields, functions */
3676 if (!nofields && var->expression.vtype == TYPE_FIELD) {
3677 vec_push(parser->fields, (ast_expression*)var);
3678 util_htset(parser->htfields, var->name, var);
3680 for (i = 0; i < 3; ++i) {
3681 vec_push(parser->fields, (ast_expression*)me[i]);
3682 util_htset(parser->htfields, me[i]->name, me[i]);
3687 vec_push(parser->globals, (ast_expression*)var);
3688 util_htset(parser->htglobals, var->name, var);
3690 for (i = 0; i < 3; ++i) {
3691 vec_push(parser->globals, (ast_expression*)me[i]);
3692 util_htset(parser->htglobals, me[i]->name, me[i]);
3697 vec_push(localblock->locals, var);
3698 parser_addlocal(parser, var->name, (ast_expression*)var);
3700 for (i = 0; i < 3; ++i) {
3701 parser_addlocal(parser, me[i]->name, (ast_expression*)me[i]);
3702 ast_block_collect(localblock, (ast_expression*)me[i]);
3708 me[0] = me[1] = me[2] = NULL;
3713 if (var->expression.vtype == TYPE_ARRAY) {
3715 snprintf(name, sizeof(name), "%s##SET", var->name);
3716 if (!parser_create_array_setter(parser, var, name))
3718 snprintf(name, sizeof(name), "%s##GET", var->name);
3719 if (!parser_create_array_getter(parser, var, var->expression.next, name))
3722 else if (!localblock && !nofields &&
3723 var->expression.vtype == TYPE_FIELD &&
3724 var->expression.next->expression.vtype == TYPE_ARRAY)
3727 ast_expression *telem;
3729 ast_value *array = (ast_value*)var->expression.next;
3731 if (!ast_istype(var->expression.next, ast_value)) {
3732 parseerror(parser, "internal error: field element type must be an ast_value");
3736 snprintf(name, sizeof(name), "%s##SETF", var->name);
3737 if (!parser_create_array_field_setter(parser, array, name))
3740 telem = ast_type_copy(ast_ctx(var), array->expression.next);
3741 tfield = ast_value_new(ast_ctx(var), "<.type>", TYPE_FIELD);
3742 tfield->expression.next = telem;
3743 snprintf(name, sizeof(name), "%s##GETFP", var->name);
3744 if (!parser_create_array_getter(parser, array, (ast_expression*)tfield, name)) {
3752 if (parser->tok == ';') {
3753 ast_delete(basetype);
3754 if (!parser_next(parser)) {
3755 parseerror(parser, "error after variable declaration");
3761 if (parser->tok == ',')
3764 if (!var || (!localblock && !nofields && basetype->expression.vtype == TYPE_FIELD)) {
3765 parseerror(parser, "missing comma or semicolon while parsing variables");
3769 if (localblock && opts_standard == COMPILER_QCC) {
3770 if (parsewarning(parser, WARN_LOCAL_CONSTANTS,
3771 "initializing expression turns variable `%s` into a constant in this standard",
3778 if (parser->tok != '{') {
3779 if (parser->tok != '=') {
3780 parseerror(parser, "missing semicolon or initializer, got: `%s`", parser_tokval(parser));
3784 if (!parser_next(parser)) {
3785 parseerror(parser, "error parsing initializer");
3789 else if (opts_standard == COMPILER_QCC) {
3790 parseerror(parser, "expected '=' before function body in this standard");
3793 if (parser->tok == '#') {
3794 ast_function *func = NULL;
3797 parseerror(parser, "cannot declare builtins within functions");
3800 if (var->expression.vtype != TYPE_FUNCTION) {
3801 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
3804 if (!parser_next(parser)) {
3805 parseerror(parser, "expected builtin number");
3808 if (parser->tok != TOKEN_INTCONST) {
3809 parseerror(parser, "builtin number must be an integer constant");
3812 if (parser_token(parser)->constval.i <= 0) {
3813 parseerror(parser, "builtin number must be an integer greater than zero");
3817 if (var->hasvalue) {
3818 (void)!parsewarning(parser, WARN_DOUBLE_DECLARATION,
3819 "builtin `%s` has already been defined\n"
3820 " -> previous declaration here: %s:%i",
3821 var->name, ast_ctx(var).file, (int)ast_ctx(var).line);
3825 func = ast_function_new(ast_ctx(var), var->name, var);
3827 parseerror(parser, "failed to allocate function for `%s`", var->name);
3830 vec_push(parser->functions, func);
3832 func->builtin = -parser_token(parser)->constval.i;
3835 if (!parser_next(parser)) {
3836 parseerror(parser, "expected comma or semicolon");
3838 ast_function_delete(func);
3839 var->constval.vfunc = NULL;
3843 else if (parser->tok == '{' || parser->tok == '[')
3846 parseerror(parser, "cannot declare functions within functions");
3850 if (!parse_function_body(parser, var))
3852 ast_delete(basetype);
3855 ast_expression *cexp;
3858 cexp = parse_expression_leave(parser, true);
3863 cval = (ast_value*)cexp;
3864 if (!ast_istype(cval, ast_value) || !cval->hasvalue || !cval->constant)
3865 parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
3868 if (opts_standard != COMPILER_GMQCC &&
3869 !OPTS_FLAG(INITIALIZED_NONCONSTANTS) &&
3870 is_const_var != CV_VAR)
3872 var->constant = true;
3874 var->hasvalue = true;
3875 if (cval->expression.vtype == TYPE_STRING)
3876 var->constval.vstring = parser_strdup(cval->constval.vstring);
3878 memcpy(&var->constval, &cval->constval, sizeof(var->constval));
3882 shunt sy = { NULL, NULL };
3883 vec_push(sy.out, syexp(ast_ctx(var), (ast_expression*)var));
3884 vec_push(sy.out, syexp(ast_ctx(cexp), (ast_expression*)cexp));
3885 vec_push(sy.ops, syop(ast_ctx(var), parser->assign_op));
3886 if (!parser_sy_pop(parser, &sy))
3889 if (vec_size(sy.out) != 1 && vec_size(sy.ops) != 0)
3890 parseerror(parser, "internal error: leaked operands");
3891 ast_block_add_expr(localblock, (ast_expression*)sy.out[0].out);
3899 if (parser->tok == ',') {
3900 if (!parser_next(parser)) {
3901 parseerror(parser, "expected another variable");
3905 if (parser->tok != TOKEN_IDENT) {
3906 parseerror(parser, "expected another variable");
3909 var = ast_value_copy(basetype);
3911 ast_value_set_name(var, parser_tokval(parser));
3912 if (!parser_next(parser)) {
3913 parseerror(parser, "error parsing variable declaration");
3919 if (parser->tok != ';') {
3920 parseerror(parser, "missing semicolon after variables");
3924 if (!parser_next(parser)) {
3925 parseerror(parser, "parse error after variable declaration");
3929 ast_delete(basetype);
3933 if (cleanvar && var)
3935 ast_delete(basetype);
3939 ast_delete(basetype);
3940 if (cleanvar && var)
3942 if (me[0]) ast_member_delete(me[0]);
3943 if (me[1]) ast_member_delete(me[1]);
3944 if (me[2]) ast_member_delete(me[2]);
3948 static bool parser_global_statement(parser_t *parser)
3950 ast_value *istype = NULL;
3951 if (parser->tok == TOKEN_IDENT)
3952 istype = parser_find_typedef(parser, parser_tokval(parser), 0);
3954 if (istype || parser->tok == TOKEN_TYPENAME || parser->tok == '.')
3956 return parse_variable(parser, NULL, false, CV_NONE, istype);
3958 else if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "var"))
3960 if (!strcmp(parser_tokval(parser), "var")) {
3961 if (!parser_next(parser)) {
3962 parseerror(parser, "expected variable declaration after 'var'");
3965 return parse_variable(parser, NULL, true, CV_VAR, NULL);
3968 else if (parser->tok == TOKEN_KEYWORD)
3970 if (!strcmp(parser_tokval(parser), "const")) {
3971 if (!parser_next(parser)) {
3972 parseerror(parser, "expected variable declaration after 'const'");
3975 if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "var")) {
3976 (void)!parsewarning(parser, WARN_CONST_VAR, "ignoring `var` after const qualifier");
3977 if (!parser_next(parser)) {
3978 parseerror(parser, "expected variable declaration after 'const var'");
3982 return parse_variable(parser, NULL, true, CV_CONST, NULL);
3984 else if (!strcmp(parser_tokval(parser), "typedef")) {
3985 if (!parser_next(parser)) {
3986 parseerror(parser, "expected type definition after 'typedef'");
3989 return parse_typedef(parser);
3991 parseerror(parser, "unrecognized keyword `%s`", parser_tokval(parser));
3994 else if (parser->tok == '$')
3996 if (!parser_next(parser)) {
3997 parseerror(parser, "parse error");
4003 parseerror(parser, "unexpected token: %s", parser->lex->tok.value);
4009 static uint16_t progdefs_crc_sum(uint16_t old, const char *str)
4011 return util_crc16(old, str, strlen(str));
4014 static void progdefs_crc_file(const char *str)
4016 /* write to progdefs.h here */
4020 static uint16_t progdefs_crc_both(uint16_t old, const char *str)
4022 old = progdefs_crc_sum(old, str);
4023 progdefs_crc_file(str);
4027 static void generate_checksum(parser_t *parser)
4029 uint16_t crc = 0xFFFF;
4033 crc = progdefs_crc_both(crc, "\n/* file generated by qcc, do not modify */\n\ntypedef struct\n{");
4034 crc = progdefs_crc_sum(crc, "\tint\tpad[28];\n");
4036 progdefs_crc_file("\tint\tpad;\n");
4037 progdefs_crc_file("\tint\tofs_return[3];\n");
4038 progdefs_crc_file("\tint\tofs_parm0[3];\n");
4039 progdefs_crc_file("\tint\tofs_parm1[3];\n");
4040 progdefs_crc_file("\tint\tofs_parm2[3];\n");
4041 progdefs_crc_file("\tint\tofs_parm3[3];\n");
4042 progdefs_crc_file("\tint\tofs_parm4[3];\n");
4043 progdefs_crc_file("\tint\tofs_parm5[3];\n");
4044 progdefs_crc_file("\tint\tofs_parm6[3];\n");
4045 progdefs_crc_file("\tint\tofs_parm7[3];\n");
4047 for (i = 0; i < parser->crc_globals; ++i) {
4048 if (!ast_istype(parser->globals[i], ast_value))
4050 value = (ast_value*)(parser->globals[i]);
4051 switch (value->expression.vtype) {
4052 case TYPE_FLOAT: crc = progdefs_crc_both(crc, "\tfloat\t"); break;
4053 case TYPE_VECTOR: crc = progdefs_crc_both(crc, "\tvec3_t\t"); break;
4054 case TYPE_STRING: crc = progdefs_crc_both(crc, "\tstring_t\t"); break;
4055 case TYPE_FUNCTION: crc = progdefs_crc_both(crc, "\tfunc_t\t"); break;
4057 crc = progdefs_crc_both(crc, "\tint\t");
4060 crc = progdefs_crc_both(crc, value->name);
4061 crc = progdefs_crc_both(crc, ";\n");
4063 crc = progdefs_crc_both(crc, "} globalvars_t;\n\ntypedef struct\n{\n");
4064 for (i = 0; i < parser->crc_fields; ++i) {
4065 if (!ast_istype(parser->fields[i], ast_value))
4067 value = (ast_value*)(parser->fields[i]);
4068 switch (value->expression.next->expression.vtype) {
4069 case TYPE_FLOAT: crc = progdefs_crc_both(crc, "\tfloat\t"); break;
4070 case TYPE_VECTOR: crc = progdefs_crc_both(crc, "\tvec3_t\t"); break;
4071 case TYPE_STRING: crc = progdefs_crc_both(crc, "\tstring_t\t"); break;
4072 case TYPE_FUNCTION: crc = progdefs_crc_both(crc, "\tfunc_t\t"); break;
4074 crc = progdefs_crc_both(crc, "\tint\t");
4077 crc = progdefs_crc_both(crc, value->name);
4078 crc = progdefs_crc_both(crc, ";\n");
4080 crc = progdefs_crc_both(crc, "} entvars_t;\n\n");
4085 static parser_t *parser;
4091 parser = (parser_t*)mem_a(sizeof(parser_t));
4095 memset(parser, 0, sizeof(*parser));
4097 for (i = 0; i < operator_count; ++i) {
4098 if (operators[i].id == opid1('=')) {
4099 parser->assign_op = operators+i;
4103 if (!parser->assign_op) {
4104 printf("internal error: initializing parser: failed to find assign operator\n");
4109 vec_push(parser->variables, parser->htfields = util_htnew(PARSER_HT_SIZE));
4110 vec_push(parser->variables, parser->htglobals = util_htnew(PARSER_HT_SIZE));
4111 vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
4112 vec_push(parser->_blocktypedefs, 0);
4116 bool parser_compile()
4118 /* initial lexer/parser state */
4119 parser->lex->flags.noops = true;
4121 if (parser_next(parser))
4123 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
4125 if (!parser_global_statement(parser)) {
4126 if (parser->tok == TOKEN_EOF)
4127 parseerror(parser, "unexpected eof");
4128 else if (!parser->errors)
4129 parseerror(parser, "there have been errors, bailing out");
4130 lex_close(parser->lex);
4136 parseerror(parser, "parse error");
4137 lex_close(parser->lex);
4142 lex_close(parser->lex);
4145 return !parser->errors;
4148 bool parser_compile_file(const char *filename)
4150 parser->lex = lex_open(filename);
4152 con_err("failed to open file \"%s\"\n", filename);
4155 return parser_compile();
4158 bool parser_compile_string_len(const char *name, const char *str, size_t len)
4160 parser->lex = lex_open_string(str, len, name);
4162 con_err("failed to create lexer for string \"%s\"\n", name);
4165 return parser_compile();
4168 bool parser_compile_string(const char *name, const char *str)
4170 parser->lex = lex_open_string(str, strlen(str), name);
4172 con_err("failed to create lexer for string \"%s\"\n", name);
4175 return parser_compile();
4178 void parser_cleanup()
4181 for (i = 0; i < vec_size(parser->accessors); ++i) {
4182 ast_delete(parser->accessors[i]->constval.vfunc);
4183 parser->accessors[i]->constval.vfunc = NULL;
4184 ast_delete(parser->accessors[i]);
4186 for (i = 0; i < vec_size(parser->functions); ++i) {
4187 ast_delete(parser->functions[i]);
4189 for (i = 0; i < vec_size(parser->imm_vector); ++i) {
4190 ast_delete(parser->imm_vector[i]);
4192 for (i = 0; i < vec_size(parser->imm_string); ++i) {
4193 ast_delete(parser->imm_string[i]);
4195 for (i = 0; i < vec_size(parser->imm_float); ++i) {
4196 ast_delete(parser->imm_float[i]);
4198 for (i = 0; i < vec_size(parser->fields); ++i) {
4199 ast_delete(parser->fields[i]);
4201 for (i = 0; i < vec_size(parser->globals); ++i) {
4202 ast_delete(parser->globals[i]);
4204 vec_free(parser->accessors);
4205 vec_free(parser->functions);
4206 vec_free(parser->imm_vector);
4207 vec_free(parser->imm_string);
4208 vec_free(parser->imm_float);
4209 vec_free(parser->globals);
4210 vec_free(parser->fields);
4212 for (i = 0; i < vec_size(parser->variables); ++i)
4213 util_htdel(parser->variables[i]);
4214 vec_free(parser->variables);
4215 vec_free(parser->_blocklocals);
4216 vec_free(parser->_locals);
4218 for (i = 0; i < vec_size(parser->_typedefs); ++i)
4219 ast_delete(parser->_typedefs[i]);
4220 vec_free(parser->_typedefs);
4221 for (i = 0; i < vec_size(parser->typedefs); ++i)
4222 util_htdel(parser->typedefs[i]);
4223 vec_free(parser->typedefs);
4224 vec_free(parser->_blocktypedefs);
4229 bool parser_finish(const char *output)
4235 if (!parser->errors)
4237 ir = ir_builder_new("gmqcc_out");
4239 con_out("failed to allocate builder\n");
4243 for (i = 0; i < vec_size(parser->fields); ++i) {
4246 if (!ast_istype(parser->fields[i], ast_value))
4248 field = (ast_value*)parser->fields[i];
4249 hasvalue = field->hasvalue;
4250 field->hasvalue = false;
4251 if (!ast_global_codegen((ast_value*)field, ir, true)) {
4252 con_out("failed to generate field %s\n", field->name);
4253 ir_builder_delete(ir);
4258 ast_expression *subtype;
4259 field->hasvalue = true;
4260 subtype = field->expression.next;
4261 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
4262 if (subtype->expression.vtype == TYPE_FIELD)
4263 ifld->fieldtype = subtype->expression.next->expression.vtype;
4264 else if (subtype->expression.vtype == TYPE_FUNCTION)
4265 ifld->outtype = subtype->expression.next->expression.vtype;
4266 (void)!ir_value_set_field(field->ir_v, ifld);
4269 for (i = 0; i < vec_size(parser->globals); ++i) {
4271 if (!ast_istype(parser->globals[i], ast_value))
4273 asvalue = (ast_value*)(parser->globals[i]);
4274 if (!asvalue->uses && !asvalue->hasvalue && asvalue->expression.vtype != TYPE_FUNCTION) {
4275 if (strcmp(asvalue->name, "end_sys_globals") &&
4276 strcmp(asvalue->name, "end_sys_fields"))
4278 retval = retval && !genwarning(ast_ctx(asvalue), WARN_UNUSED_VARIABLE,
4279 "unused global: `%s`", asvalue->name);
4282 if (!ast_global_codegen(asvalue, ir, false)) {
4283 con_out("failed to generate global %s\n", asvalue->name);
4284 ir_builder_delete(ir);
4288 for (i = 0; i < vec_size(parser->imm_float); ++i) {
4289 if (!ast_global_codegen(parser->imm_float[i], ir, false)) {
4290 con_out("failed to generate global %s\n", parser->imm_float[i]->name);
4291 ir_builder_delete(ir);
4295 for (i = 0; i < vec_size(parser->imm_string); ++i) {
4296 if (!ast_global_codegen(parser->imm_string[i], ir, false)) {
4297 con_out("failed to generate global %s\n", parser->imm_string[i]->name);
4298 ir_builder_delete(ir);
4302 for (i = 0; i < vec_size(parser->imm_vector); ++i) {
4303 if (!ast_global_codegen(parser->imm_vector[i], ir, false)) {
4304 con_out("failed to generate global %s\n", parser->imm_vector[i]->name);
4305 ir_builder_delete(ir);
4309 for (i = 0; i < vec_size(parser->globals); ++i) {
4311 if (!ast_istype(parser->globals[i], ast_value))
4313 asvalue = (ast_value*)(parser->globals[i]);
4314 if (asvalue->setter) {
4315 if (!ast_global_codegen(asvalue->setter, ir, false) ||
4316 !ast_function_codegen(asvalue->setter->constval.vfunc, ir) ||
4317 !ir_function_finalize(asvalue->setter->constval.vfunc->ir_func))
4319 printf("failed to generate setter for %s\n", asvalue->name);
4320 ir_builder_delete(ir);
4324 if (asvalue->getter) {
4325 if (!ast_global_codegen(asvalue->getter, ir, false) ||
4326 !ast_function_codegen(asvalue->getter->constval.vfunc, ir) ||
4327 !ir_function_finalize(asvalue->getter->constval.vfunc->ir_func))
4329 printf("failed to generate getter for %s\n", asvalue->name);
4330 ir_builder_delete(ir);
4335 for (i = 0; i < vec_size(parser->fields); ++i) {
4337 asvalue = (ast_value*)(parser->fields[i]->expression.next);
4339 if (!ast_istype((ast_expression*)asvalue, ast_value))
4341 if (asvalue->expression.vtype != TYPE_ARRAY)
4343 if (asvalue->setter) {
4344 if (!ast_global_codegen(asvalue->setter, ir, false) ||
4345 !ast_function_codegen(asvalue->setter->constval.vfunc, ir) ||
4346 !ir_function_finalize(asvalue->setter->constval.vfunc->ir_func))
4348 printf("failed to generate setter for %s\n", asvalue->name);
4349 ir_builder_delete(ir);
4353 if (asvalue->getter) {
4354 if (!ast_global_codegen(asvalue->getter, ir, false) ||
4355 !ast_function_codegen(asvalue->getter->constval.vfunc, ir) ||
4356 !ir_function_finalize(asvalue->getter->constval.vfunc->ir_func))
4358 printf("failed to generate getter for %s\n", asvalue->name);
4359 ir_builder_delete(ir);
4364 for (i = 0; i < vec_size(parser->functions); ++i) {
4365 if (!ast_function_codegen(parser->functions[i], ir)) {
4366 con_out("failed to generate function %s\n", parser->functions[i]->name);
4367 ir_builder_delete(ir);
4372 ir_builder_dump(ir, con_out);
4373 for (i = 0; i < vec_size(parser->functions); ++i) {
4374 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
4375 con_out("failed to finalize function %s\n", parser->functions[i]->name);
4376 ir_builder_delete(ir);
4383 ir_builder_dump(ir, con_out);
4385 generate_checksum(parser);
4387 if (!ir_builder_generate(ir, output)) {
4388 con_out("*** failed to generate output file\n");
4389 ir_builder_delete(ir);
4394 ir_builder_delete(ir);
4398 con_out("*** there were compile errors\n");