16 MEM_VECTOR_MAKE(varentry_t, globals);
17 MEM_VECTOR_MAKE(varentry_t, fields);
18 MEM_VECTOR_MAKE(ast_function*, functions);
19 MEM_VECTOR_MAKE(ast_value*, imm_float);
20 MEM_VECTOR_MAKE(ast_value*, imm_string);
21 MEM_VECTOR_MAKE(ast_value*, imm_vector);
23 ast_value *imm_float_zero;
24 ast_value *imm_vector_zero;
26 ast_function *function;
27 MEM_VECTOR_MAKE(varentry_t, locals);
32 /* TYPE_FIELD -> parser_find_fields is used instead of find_var
33 * TODO: TYPE_VECTOR -> x, y and z are accepted in the gmqcc standard
34 * anything else: type error
39 MEM_VEC_FUNCTIONS(parser_t, varentry_t, globals)
40 MEM_VEC_FUNCTIONS(parser_t, varentry_t, fields)
41 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_float)
42 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_string)
43 MEM_VEC_FUNCTIONS(parser_t, ast_value*, imm_vector)
44 MEM_VEC_FUNCTIONS(parser_t, varentry_t, locals)
45 MEM_VEC_FUNCTIONS(parser_t, ast_function*, functions)
47 static void parser_pop_local(parser_t *parser);
48 static bool parser_variable(parser_t *parser, ast_block *localblock);
49 static ast_block* parser_parse_block(parser_t *parser);
50 static bool parser_parse_block_into(parser_t *parser, ast_block *block);
51 static ast_expression* parser_parse_statement_or_block(parser_t *parser);
52 static ast_expression* parser_expression_leave(parser_t *parser, bool stopatcomma);
53 static ast_expression* parser_expression(parser_t *parser, bool stopatcomma);
55 void parseerror(parser_t *parser, const char *fmt, ...)
62 vprintmsg(LVL_ERROR, parser->lex->tok->ctx.file, parser->lex->tok->ctx.line, "parse error", fmt, ap);
66 /* returns true if it counts as an error */
67 bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *fmt, ...)
70 int lvl = LVL_WARNING;
72 if (!OPTS_WARN(warntype))
81 vprintmsg(lvl, parser->lex->tok->ctx.file, parser->lex->tok->ctx.line, "warning", fmt, ap);
87 /**********************************************************************
88 * some maths used for constant folding
91 vector vec3_add(vector a, vector b)
100 vector vec3_sub(vector a, vector b)
109 qcfloat vec3_mulvv(vector a, vector b)
111 return (a.x * b.x + a.y * b.y + a.z * b.z);
114 vector vec3_mulvf(vector a, float b)
123 /**********************************************************************
127 bool parser_next(parser_t *parser)
129 /* lex_do kills the previous token */
130 parser->tok = lex_do(parser->lex);
131 if (parser->tok == TOKEN_EOF)
133 if (parser->tok >= TOKEN_ERROR) {
134 parseerror(parser, "lex error");
140 /* lift a token out of the parser so it's not destroyed by parser_next */
141 token *parser_lift(parser_t *parser)
143 token *tok = parser->lex->tok;
144 parser->lex->tok = NULL;
148 #define parser_tokval(p) (p->lex->tok->value)
149 #define parser_token(p) (p->lex->tok)
150 #define parser_ctx(p) (p->lex->tok->ctx)
152 ast_value* parser_const_float(parser_t *parser, double d)
156 for (i = 0; i < parser->imm_float_count; ++i) {
157 if (parser->imm_float[i]->constval.vfloat == d)
158 return parser->imm_float[i];
160 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_FLOAT);
162 out->constval.vfloat = d;
163 if (!parser_t_imm_float_add(parser, out)) {
164 ast_value_delete(out);
170 ast_value* parser_const_float_0(parser_t *parser)
172 if (!parser->imm_float_zero)
173 parser->imm_float_zero = parser_const_float(parser, 0);
174 return parser->imm_float_zero;
177 char *parser_strdup(const char *str)
180 /* actually dup empty strings */
181 char *out = mem_a(1);
185 return util_strdup(str);
188 ast_value* parser_const_string(parser_t *parser, const char *str)
192 for (i = 0; i < parser->imm_string_count; ++i) {
193 if (!strcmp(parser->imm_string[i]->constval.vstring, str))
194 return parser->imm_string[i];
196 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_STRING);
198 out->constval.vstring = parser_strdup(str);
199 if (!parser_t_imm_string_add(parser, out)) {
200 ast_value_delete(out);
206 ast_value* parser_const_vector(parser_t *parser, vector v)
210 for (i = 0; i < parser->imm_vector_count; ++i) {
211 if (!memcmp(&parser->imm_vector[i]->constval.vvec, &v, sizeof(v)))
212 return parser->imm_vector[i];
214 out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_VECTOR);
216 out->constval.vvec = v;
217 if (!parser_t_imm_vector_add(parser, out)) {
218 ast_value_delete(out);
224 ast_value* parser_const_vector_f(parser_t *parser, float x, float y, float z)
230 return parser_const_vector(parser, v);
233 ast_value* parser_const_vector_0(parser_t *parser)
235 if (!parser->imm_vector_zero)
236 parser->imm_vector_zero = parser_const_vector_f(parser, 0, 0, 0);
237 return parser->imm_vector_zero;
240 ast_expression* parser_find_field(parser_t *parser, const char *name)
243 for (i = 0; i < parser->fields_count; ++i) {
244 if (!strcmp(parser->fields[i].name, name))
245 return parser->fields[i].var;
250 ast_expression* parser_find_global(parser_t *parser, const char *name)
253 for (i = 0; i < parser->globals_count; ++i) {
254 if (!strcmp(parser->globals[i].name, name))
255 return parser->globals[i].var;
260 ast_expression* parser_find_param(parser_t *parser, const char *name)
264 if (!parser->function)
266 fun = parser->function->vtype;
267 for (i = 0; i < fun->expression.params_count; ++i) {
268 if (!strcmp(fun->expression.params[i]->name, name))
269 return (ast_expression*)(fun->expression.params[i]);
274 ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto, bool *isparam)
278 for (i = parser->locals_count; i > upto;) {
280 if (!strcmp(parser->locals[i].name, name))
281 return parser->locals[i].var;
284 return parser_find_param(parser, name);
287 ast_expression* parser_find_var(parser_t *parser, const char *name)
291 v = parser_find_local(parser, name, 0, &dummy);
292 if (!v) v = parser_find_global(parser, name);
297 MEM_VECTOR_MAKE(ast_value*, p);
299 MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
301 static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
305 lex_ctx ctx = parser_ctx(parser);
306 int vtype = basetype;
310 MEM_VECTOR_INIT(¶ms, p);
314 if (parser->tok == '(') {
319 bool isfield = false;
322 if (!parser_next(parser))
325 if (parser->tok == ')')
328 if (parser->tok == '.') {
330 if (!parser_next(parser)) {
331 parseerror(parser, "expected field parameter type");
336 temptype = parser_token(parser)->constval.t;
337 if (!parser_next(parser))
340 param = parser_parse_type(parser, temptype, &dummy);
346 if (parser->tok == TOKEN_IDENT) {
347 /* named parameter */
348 if (!ast_value_set_name(param, parser_tokval(parser)))
350 if (!parser_next(parser))
355 fld = ast_value_new(ctx, param->name, TYPE_FIELD);
356 fld->expression.next = (ast_expression*)param;
360 if (!paramlist_t_p_add(¶ms, param)) {
361 parseerror(parser, "Out of memory while parsing typename");
365 if (parser->tok == ',')
367 if (parser->tok == ')')
369 parseerror(parser, "Unexpected token");
372 if (!parser_next(parser))
376 var = ast_value_new(ctx, "<unnamed>", vtype);
379 MEM_VECTOR_MOVE(¶ms, p, &var->expression, params);
382 for (i = 0; i < params.p_count; ++i)
383 ast_value_delete(params.p[i]);
384 MEM_VECTOR_CLEAR(¶ms, p);
390 size_t etype; /* 0 = expression, others are operators */
394 ast_block *block; /* for commas and function calls */
399 MEM_VECTOR_MAKE(sy_elem, out);
400 MEM_VECTOR_MAKE(sy_elem, ops);
402 MEM_VEC_FUNCTIONS(shunt, sy_elem, out)
403 MEM_VEC_FUNCTIONS(shunt, sy_elem, ops)
405 static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
415 static sy_elem syblock(lex_ctx ctx, ast_block *v) {
418 e.out = (ast_expression*)v;
425 static sy_elem syop(lex_ctx ctx, const oper_info *op) {
427 e.etype = 1 + (op - operators);
435 static sy_elem syparen(lex_ctx ctx, int p, size_t off) {
447 # define DEBUGSHUNTDO(x) x
449 # define DEBUGSHUNTDO(x)
452 static bool parser_sy_pop(parser_t *parser, shunt *sy)
456 ast_expression *out = NULL;
457 ast_expression *exprs[3];
458 ast_block *blocks[3];
459 ast_value *asvalue[3];
461 qcint generated_op = 0;
463 if (!sy->ops_count) {
464 parseerror(parser, "internal error: missing operator");
468 if (sy->ops[sy->ops_count-1].paren) {
469 parseerror(parser, "unmatched parenthesis");
473 op = &operators[sy->ops[sy->ops_count-1].etype - 1];
474 ctx = sy->ops[sy->ops_count-1].ctx;
476 DEBUGSHUNTDO(printf("apply %s\n", op->op));
478 if (sy->out_count < op->operands) {
479 parseerror(parser, "internal error: not enough operands: %i (operator %s (%i))", sy->out_count,
480 op->op, (int)op->id);
486 sy->out_count -= op->operands;
487 for (i = 0; i < op->operands; ++i) {
488 exprs[i] = sy->out[sy->out_count+i].out;
489 blocks[i] = sy->out[sy->out_count+i].block;
490 asvalue[i] = (ast_value*)exprs[i];
493 if (blocks[0] && !blocks[0]->exprs_count && op->id != opid1(',')) {
494 parseerror(parser, "internal error: operator cannot be applied on empty blocks");
498 #define NotSameType(T) \
499 (exprs[0]->expression.vtype != exprs[1]->expression.vtype || \
500 exprs[0]->expression.vtype != T)
501 #define CanConstFold1(A) \
502 (ast_istype((A), ast_value) && ((ast_value*)(A))->isconst)
503 #define CanConstFold(A, B) \
504 (CanConstFold1(A) && CanConstFold1(B))
505 #define ConstV(i) (asvalue[(i)]->constval.vvec)
506 #define ConstF(i) (asvalue[(i)]->constval.vfloat)
507 #define ConstS(i) (asvalue[(i)]->constval.vstring)
511 parseerror(parser, "internal error: unhandled operator: %s (%i)", op->op, (int)op->id);
515 if (exprs[0]->expression.vtype == TYPE_ENTITY) {
516 if (exprs[1]->expression.vtype != TYPE_FIELD) {
517 parseerror(parser, "type error: right hand of member-operand should be an entity-field");
520 out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
522 else if (exprs[0]->expression.vtype == TYPE_VECTOR) {
523 parseerror(parser, "internal error: vector access is not supposed to be handled at this point");
527 parseerror(parser, "type error: member-of operator on something that is not an entity or vector");
534 if (!ast_block_exprs_add(blocks[0], exprs[1]))
537 blocks[0] = ast_block_new(ctx);
538 if (!ast_block_exprs_add(blocks[0], exprs[0]) ||
539 !ast_block_exprs_add(blocks[0], exprs[1]))
544 if (!ast_block_set_type(blocks[0], exprs[1]))
547 sy->out[sy->out_count++] = syblock(ctx, blocks[0]);
551 switch (exprs[0]->expression.vtype) {
553 if (CanConstFold1(exprs[0]))
554 out = (ast_expression*)parser_const_float(parser, -ConstF(0));
556 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F,
557 (ast_expression*)parser_const_float_0(parser),
561 if (CanConstFold1(exprs[0]))
562 out = (ast_expression*)parser_const_vector_f(parser,
563 -ConstV(0).x, -ConstV(0).y, -ConstV(0).z);
565 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V,
566 (ast_expression*)parser_const_vector_0(parser),
570 parseerror(parser, "invalid types used in expression: cannot negate type %s",
571 type_name[exprs[0]->expression.vtype]);
577 switch (exprs[0]->expression.vtype) {
579 if (CanConstFold1(exprs[0]))
580 out = (ast_expression*)parser_const_float(parser, !ConstF(0));
582 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
585 if (CanConstFold1(exprs[0]))
586 out = (ast_expression*)parser_const_float(parser,
587 (!ConstV(0).x && !ConstV(0).y && !ConstV(0).z));
589 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[0]);
592 if (CanConstFold1(exprs[0]))
593 out = (ast_expression*)parser_const_float(parser, !ConstS(0) || !*ConstS(0));
595 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[0]);
597 /* we don't constant-fold NOT for these types */
599 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_ENT, exprs[0]);
602 out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_FNC, exprs[0]);
605 parseerror(parser, "invalid types used in expression: cannot logically negate type %s",
606 type_name[exprs[0]->expression.vtype]);
612 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
613 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
615 parseerror(parser, "invalid types used in expression: cannot add type %s and %s",
616 type_name[exprs[0]->expression.vtype],
617 type_name[exprs[1]->expression.vtype]);
620 switch (exprs[0]->expression.vtype) {
622 if (CanConstFold(exprs[0], exprs[1]))
624 out = (ast_expression*)parser_const_float(parser, ConstF(0) + ConstF(1));
627 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
630 if (CanConstFold(exprs[0], exprs[1]))
631 out = (ast_expression*)parser_const_vector(parser, vec3_add(ConstV(0), ConstV(1)));
633 out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
636 parseerror(parser, "invalid types used in expression: cannot add type %s and %s",
637 type_name[exprs[0]->expression.vtype],
638 type_name[exprs[1]->expression.vtype]);
643 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
644 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
646 parseerror(parser, "invalid types used in expression: cannot subtract type %s from %s",
647 type_name[exprs[1]->expression.vtype],
648 type_name[exprs[0]->expression.vtype]);
651 switch (exprs[0]->expression.vtype) {
653 if (CanConstFold(exprs[0], exprs[1]))
654 out = (ast_expression*)parser_const_float(parser, ConstF(0) - ConstF(1));
656 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
659 if (CanConstFold(exprs[0], exprs[1]))
660 out = (ast_expression*)parser_const_vector(parser, vec3_sub(ConstV(0), ConstV(1)));
662 out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
665 parseerror(parser, "invalid types used in expression: cannot subtract type %s from %s",
666 type_name[exprs[1]->expression.vtype],
667 type_name[exprs[0]->expression.vtype]);
672 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype &&
673 exprs[0]->expression.vtype != TYPE_VECTOR &&
674 exprs[0]->expression.vtype != TYPE_FLOAT &&
675 exprs[1]->expression.vtype != TYPE_VECTOR &&
676 exprs[1]->expression.vtype != TYPE_FLOAT)
678 parseerror(parser, "invalid types used in expression: cannot multiply types %s and %s",
679 type_name[exprs[1]->expression.vtype],
680 type_name[exprs[0]->expression.vtype]);
683 switch (exprs[0]->expression.vtype) {
685 if (exprs[1]->expression.vtype == TYPE_VECTOR)
687 if (CanConstFold(exprs[0], exprs[1]))
688 out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(1), ConstF(0)));
690 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
694 if (CanConstFold(exprs[0], exprs[1]))
695 out = (ast_expression*)parser_const_float(parser, ConstF(0) * ConstF(1));
697 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
701 if (exprs[1]->expression.vtype == TYPE_FLOAT)
703 if (CanConstFold(exprs[0], exprs[1]))
704 out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(0), ConstF(1)));
706 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
710 if (CanConstFold(exprs[0], exprs[1]))
711 out = (ast_expression*)parser_const_float(parser, vec3_mulvv(ConstV(0), ConstV(1)));
713 out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
717 parseerror(parser, "invalid types used in expression: cannot multiply types %s and %s",
718 type_name[exprs[1]->expression.vtype],
719 type_name[exprs[0]->expression.vtype]);
724 if (NotSameType(TYPE_FLOAT)) {
725 parseerror(parser, "invalid types used in expression: cannot divide types %s and %s",
726 type_name[exprs[0]->expression.vtype],
727 type_name[exprs[1]->expression.vtype]);
730 if (CanConstFold(exprs[0], exprs[1]))
731 out = (ast_expression*)parser_const_float(parser, ConstF(0) / ConstF(1));
733 out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
737 parseerror(parser, "qc does not have a modulo operator");
741 if (NotSameType(TYPE_FLOAT)) {
742 parseerror(parser, "invalid types used in expression: cannot perform bit operations between types %s and %s",
743 type_name[exprs[0]->expression.vtype],
744 type_name[exprs[1]->expression.vtype]);
747 if (CanConstFold(exprs[0], exprs[1]))
748 out = (ast_expression*)parser_const_float(parser,
749 (op->id == opid1('|') ? (float)( ((qcint)ConstF(0)) | ((qcint)ConstF(1)) ) :
750 (float)( ((qcint)ConstF(0)) & ((qcint)ConstF(1)) ) ));
752 out = (ast_expression*)ast_binary_new(ctx,
753 (op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
757 parseerror(parser, "TODO: bitxor");
762 case opid3('<','<','='):
763 case opid3('>','>','='):
764 parseerror(parser, "TODO: shifts");
768 generated_op += 1; /* INSTR_OR */
770 generated_op += INSTR_AND;
771 if (NotSameType(TYPE_FLOAT)) {
772 parseerror(parser, "invalid types used in expression: cannot perform logical operations between types %s and %s",
773 type_name[exprs[0]->expression.vtype],
774 type_name[exprs[1]->expression.vtype]);
775 parseerror(parser, "TODO: logical ops for arbitrary types using INSTR_NOT");
776 parseerror(parser, "TODO: optional early out");
779 if (opts_standard == COMPILER_GMQCC)
780 printf("TODO: early out logic\n");
781 if (CanConstFold(exprs[0], exprs[1]))
782 out = (ast_expression*)parser_const_float(parser,
783 (generated_op == INSTR_OR ? (ConstF(0) || ConstF(1)) : (ConstF(0) && ConstF(1))));
785 out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
789 generated_op += 1; /* INSTR_GT */
791 generated_op += 1; /* INSTR_LT */
792 case opid2('>', '='):
793 generated_op += 1; /* INSTR_GE */
794 case opid2('<', '='):
795 generated_op += INSTR_LE;
796 if (NotSameType(TYPE_FLOAT)) {
797 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
798 type_name[exprs[0]->expression.vtype],
799 type_name[exprs[1]->expression.vtype]);
802 out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
804 case opid2('!', '='):
805 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
806 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
807 type_name[exprs[0]->expression.vtype],
808 type_name[exprs[1]->expression.vtype]);
811 out = (ast_expression*)ast_binary_new(ctx, type_ne_instr[exprs[0]->expression.vtype], exprs[0], exprs[1]);
813 case opid2('=', '='):
814 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype) {
815 parseerror(parser, "invalid types used in expression: cannot perform comparison between types %s and %s",
816 type_name[exprs[0]->expression.vtype],
817 type_name[exprs[1]->expression.vtype]);
820 out = (ast_expression*)ast_binary_new(ctx, type_eq_instr[exprs[0]->expression.vtype], exprs[0], exprs[1]);
824 if (ast_istype(exprs[0], ast_entfield))
825 assignop = type_storep_instr[exprs[0]->expression.vtype];
827 assignop = type_store_instr[exprs[0]->expression.vtype];
828 out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
832 if (exprs[0]->expression.vtype != exprs[1]->expression.vtype ||
833 (exprs[0]->expression.vtype != TYPE_VECTOR && exprs[0]->expression.vtype != TYPE_FLOAT) )
835 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
836 type_name[exprs[0]->expression.vtype],
837 type_name[exprs[1]->expression.vtype]);
840 if (ast_istype(exprs[0], ast_entfield))
841 assignop = type_storep_instr[exprs[0]->expression.vtype];
843 assignop = type_store_instr[exprs[0]->expression.vtype];
844 switch (exprs[0]->expression.vtype) {
846 out = (ast_expression*)ast_binstore_new(ctx, assignop,
847 (op->id == opid2('+','=') ? INSTR_ADD_F : INSTR_SUB_F),
851 out = (ast_expression*)ast_binstore_new(ctx, assignop,
852 (op->id == opid2('+','=') ? INSTR_ADD_V : INSTR_SUB_V),
856 parseerror(parser, "invalid types used in expression: cannot add or subtract type %s and %s",
857 type_name[exprs[0]->expression.vtype],
858 type_name[exprs[1]->expression.vtype]);
866 parseerror(parser, "failed to apply operand %s", op->op);
870 DEBUGSHUNTDO(printf("applied %s\n", op->op));
871 sy->out[sy->out_count++] = syexp(ctx, out);
875 static bool parser_close_call(parser_t *parser, shunt *sy)
877 /* was a function call */
885 fid = sy->ops[sy->ops_count].off;
887 /* out[fid] is the function
888 * everything above is parameters...
890 * 1 params = ast_expression
894 if (sy->out_count < 1 || sy->out_count <= fid) {
895 parseerror(parser, "internal error: function call needs function and parameter list...");
899 fun = sy->out[fid].out;
901 call = ast_call_new(sy->ops[sy->ops_count].ctx, fun);
903 parseerror(parser, "out of memory");
907 if (fid+1 == sy->out_count) {
910 } else if (fid+2 == sy->out_count) {
913 params = sy->out[sy->out_count].block;
917 if (!ast_call_params_add(call, sy->out[sy->out_count].out)) {
918 ast_delete(sy->out[sy->out_count].out);
919 parseerror(parser, "out of memory");
923 paramcount = params->exprs_count;
924 MEM_VECTOR_MOVE(params, exprs, call, params);
928 parseerror(parser, "invalid function call");
932 /* overwrite fid, the function, with a call */
933 sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);
935 if (fun->expression.vtype != TYPE_FUNCTION) {
936 parseerror(parser, "not a function (%s)", type_name[fun->expression.vtype]);
940 if (!fun->expression.next) {
941 parseerror(parser, "could not determine function return type");
944 if (fun->expression.params_count != paramcount) {
946 fval = (ast_istype(fun, ast_value) ? ((ast_value*)fun) : NULL);
947 if (opts_standard == COMPILER_GMQCC)
950 parseerror(parser, "too few parameters for call to %s: expected %i, got %i",
951 fval->name, (int)fun->expression.params_count, paramcount);
953 parseerror(parser, "too few parameters for function call: expected %i, got %i",
954 (int)fun->expression.params_count, paramcount);
960 return !parsewarning(parser, WARN_TOO_FEW_PARAMETERS,
961 "too few parameters for call to %s: expected %i, got %i",
962 fval->name, (int)fun->expression.params_count, paramcount);
964 return !parsewarning(parser, WARN_TOO_FEW_PARAMETERS,
965 "too few parameters for function call: expected %i, got %i",
966 (int)fun->expression.params_count, paramcount);
974 static bool parser_close_paren(parser_t *parser, shunt *sy, bool functions_only)
976 if (!sy->ops_count) {
977 parseerror(parser, "unmatched closing paren");
980 if (sy->ops[sy->ops_count-1].paren == 1) {
981 parseerror(parser, "empty parenthesis expression");
984 while (sy->ops_count) {
985 if (sy->ops[sy->ops_count-1].paren == 'f') {
986 if (!parser_close_call(parser, sy))
990 if (sy->ops[sy->ops_count-1].paren == 1) {
992 return !functions_only;
994 if (!parser_sy_pop(parser, sy))
1000 static void parser_reclassify_token(parser_t *parser)
1003 for (i = 0; i < operator_count; ++i) {
1004 if (!strcmp(parser_tokval(parser), operators[i].op)) {
1005 parser->tok = TOKEN_OPERATOR;
1011 static ast_expression* parser_expression_leave(parser_t *parser, bool stopatcomma)
1013 ast_expression *expr = NULL;
1015 bool wantop = false;
1016 bool gotmemberof = false;
1018 /* count the parens because an if starts with one, so the
1019 * end of a condition is an unmatched closing paren
1023 MEM_VECTOR_INIT(&sy, out);
1024 MEM_VECTOR_INIT(&sy, ops);
1026 parser->lex->flags.noops = false;
1028 parser_reclassify_token(parser);
1033 gotmemberof = false;
1035 parser->memberof = 0;
1037 if (parser->tok == TOKEN_IDENT)
1039 ast_expression *var;
1041 parseerror(parser, "expected operator or end of statement");
1046 if (opts_standard == COMPILER_GMQCC)
1048 if (parser->memberof == TYPE_ENTITY) {
1049 /* still get vars first since there could be a fieldpointer */
1050 var = parser_find_var(parser, parser_tokval(parser));
1052 var = parser_find_field(parser, parser_tokval(parser));
1054 else if (parser->memberof == TYPE_VECTOR)
1056 parseerror(parser, "TODO: implement effective vector member access");
1059 else if (parser->memberof) {
1060 parseerror(parser, "namespace for member not found");
1064 var = parser_find_var(parser, parser_tokval(parser));
1066 var = parser_find_var(parser, parser_tokval(parser));
1068 var = parser_find_field(parser, parser_tokval(parser));
1071 parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
1074 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), var))) {
1075 parseerror(parser, "out of memory");
1078 DEBUGSHUNTDO(printf("push %s\n", parser_tokval(parser)));
1080 else if (parser->tok == TOKEN_FLOATCONST) {
1083 parseerror(parser, "expected operator or end of statement, got constant");
1087 val = parser_const_float(parser, (parser_token(parser)->constval.f));
1090 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1091 parseerror(parser, "out of memory");
1094 DEBUGSHUNTDO(printf("push %g\n", parser_token(parser)->constval.f));
1096 else if (parser->tok == TOKEN_INTCONST) {
1099 parseerror(parser, "expected operator or end of statement, got constant");
1103 val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
1106 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1107 parseerror(parser, "out of memory");
1110 DEBUGSHUNTDO(printf("push %i\n", parser_token(parser)->constval.i));
1112 else if (parser->tok == TOKEN_STRINGCONST) {
1115 parseerror(parser, "expected operator or end of statement, got constant");
1119 val = parser_const_string(parser, parser_tokval(parser));
1122 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1123 parseerror(parser, "out of memory");
1126 DEBUGSHUNTDO(printf("push string\n"));
1128 else if (parser->tok == TOKEN_VECTORCONST) {
1131 parseerror(parser, "expected operator or end of statement, got constant");
1135 val = parser_const_vector(parser, parser_token(parser)->constval.v);
1138 if (!shunt_out_add(&sy, syexp(parser_ctx(parser), (ast_expression*)val))) {
1139 parseerror(parser, "out of memory");
1142 DEBUGSHUNTDO(printf("push '%g %g %g'\n",
1143 parser_token(parser)->constval.v.x,
1144 parser_token(parser)->constval.v.y,
1145 parser_token(parser)->constval.v.z));
1147 else if (parser->tok == '(') {
1148 parseerror(parser, "internal error: '(' should be classified as operator");
1151 else if (parser->tok == ')') {
1153 DEBUGSHUNTDO(printf("do[op] )\n"));
1157 /* we do expect an operator next */
1158 /* closing an opening paren */
1159 if (!parser_close_paren(parser, &sy, false))
1162 DEBUGSHUNTDO(printf("do[nop] )\n"));
1166 /* allowed for function calls */
1167 if (!parser_close_paren(parser, &sy, true))
1172 else if (parser->tok != TOKEN_OPERATOR) {
1174 parseerror(parser, "expected operator or end of statement");
1181 /* classify the operator */
1182 /* TODO: suffix operators */
1183 const oper_info *op;
1184 const oper_info *olast = NULL;
1186 for (o = 0; o < operator_count; ++o) {
1187 if ((!(operators[o].flags & OP_PREFIX) == wantop) &&
1188 !(operators[o].flags & OP_SUFFIX) && /* remove this */
1189 !strcmp(parser_tokval(parser), operators[o].op))
1194 if (o == operator_count) {
1195 /* no operator found... must be the end of the statement */
1198 /* found an operator */
1201 /* when declaring variables, a comma starts a new variable */
1202 if (op->id == opid1(',') && !parens && stopatcomma) {
1203 /* fixup the token */
1208 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
1209 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
1212 (op->prec < olast->prec) ||
1213 (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
1215 if (!parser_sy_pop(parser, &sy))
1217 if (sy.ops_count && !sy.ops[sy.ops_count-1].paren)
1218 olast = &operators[sy.ops[sy.ops_count-1].etype-1];
1223 if (op->id == opid1('.') && opts_standard == COMPILER_GMQCC) {
1224 /* for gmqcc standard: open up the namespace of the previous type */
1225 ast_expression *prevex = sy.out[sy.out_count-1].out;
1227 parseerror(parser, "unexpected member operator");
1230 if (prevex->expression.vtype == TYPE_ENTITY)
1231 parser->memberof = TYPE_ENTITY;
1232 else if (prevex->expression.vtype == TYPE_VECTOR)
1233 parser->memberof = TYPE_VECTOR;
1235 parseerror(parser, "type error: type has no members");
1241 if (op->id == opid1('(')) {
1243 DEBUGSHUNTDO(printf("push (\n"));
1245 /* we expected an operator, this is the function-call operator */
1246 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 'f', sy.out_count-1))) {
1247 parseerror(parser, "out of memory");
1252 if (!shunt_ops_add(&sy, syparen(parser_ctx(parser), 1, 0))) {
1253 parseerror(parser, "out of memory");
1256 DEBUGSHUNTDO(printf("push (\n"));
1260 DEBUGSHUNTDO(printf("push operator %s\n", op->op));
1261 if (!shunt_ops_add(&sy, syop(parser_ctx(parser), op)))
1266 if (!parser_next(parser)) {
1269 if (parser->tok == ';' || parser->tok == ']') {
1274 while (sy.ops_count) {
1275 if (!parser_sy_pop(parser, &sy))
1279 parser->lex->flags.noops = true;
1280 if (!sy.out_count) {
1281 parseerror(parser, "empty expression");
1284 expr = sy.out[0].out;
1285 MEM_VECTOR_CLEAR(&sy, out);
1286 MEM_VECTOR_CLEAR(&sy, ops);
1287 DEBUGSHUNTDO(printf("shunt done\n"));
1291 parser->lex->flags.noops = true;
1292 MEM_VECTOR_CLEAR(&sy, out);
1293 MEM_VECTOR_CLEAR(&sy, ops);
1297 static ast_expression* parser_expression(parser_t *parser, bool stopatcomma)
1299 ast_expression *e = parser_expression_leave(parser, stopatcomma);
1302 if (!parser_next(parser)) {
1309 static bool parser_parse_if(parser_t *parser, ast_block *block, ast_expression **out)
1312 ast_expression *cond, *ontrue, *onfalse = NULL;
1314 lex_ctx ctx = parser_ctx(parser);
1316 /* skip the 'if' and check for opening paren */
1317 if (!parser_next(parser) || parser->tok != '(') {
1318 parseerror(parser, "expected 'if' condition in parenthesis");
1321 /* parse into the expression */
1322 if (!parser_next(parser)) {
1323 parseerror(parser, "expected 'if' condition after opening paren");
1326 /* parse the condition */
1327 cond = parser_expression_leave(parser, false);
1331 if (parser->tok != ')') {
1332 parseerror(parser, "expected closing paren after 'if' condition");
1336 /* parse into the 'then' branch */
1337 if (!parser_next(parser)) {
1338 parseerror(parser, "expected statement for on-true branch of 'if'");
1342 ontrue = parser_parse_statement_or_block(parser);
1347 /* check for an else */
1348 if (!strcmp(parser_tokval(parser), "else")) {
1349 /* parse into the 'else' branch */
1350 if (!parser_next(parser)) {
1351 parseerror(parser, "expected on-false branch after 'else'");
1356 onfalse = parser_parse_statement_or_block(parser);
1364 ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
1365 *out = (ast_expression*)ifthen;
1369 static bool parser_parse_while(parser_t *parser, ast_block *block, ast_expression **out)
1372 ast_expression *cond, *ontrue;
1374 lex_ctx ctx = parser_ctx(parser);
1376 /* skip the 'while' and check for opening paren */
1377 if (!parser_next(parser) || parser->tok != '(') {
1378 parseerror(parser, "expected 'while' condition in parenthesis");
1381 /* parse into the expression */
1382 if (!parser_next(parser)) {
1383 parseerror(parser, "expected 'while' condition after opening paren");
1386 /* parse the condition */
1387 cond = parser_expression_leave(parser, false);
1391 if (parser->tok != ')') {
1392 parseerror(parser, "expected closing paren after 'while' condition");
1396 /* parse into the 'then' branch */
1397 if (!parser_next(parser)) {
1398 parseerror(parser, "expected while-loop body");
1402 ontrue = parser_parse_statement_or_block(parser);
1408 aloop = ast_loop_new(ctx, NULL, cond, NULL, NULL, ontrue);
1409 *out = (ast_expression*)aloop;
1413 static bool parser_parse_dowhile(parser_t *parser, ast_block *block, ast_expression **out)
1416 ast_expression *cond, *ontrue;
1418 lex_ctx ctx = parser_ctx(parser);
1420 /* skip the 'do' and get the body */
1421 if (!parser_next(parser)) {
1422 parseerror(parser, "expected loop body");
1425 ontrue = parser_parse_statement_or_block(parser);
1429 /* expect the "while" */
1430 if (parser->tok != TOKEN_KEYWORD ||
1431 strcmp(parser_tokval(parser), "while"))
1433 parseerror(parser, "expected 'while' and condition");
1438 /* skip the 'while' and check for opening paren */
1439 if (!parser_next(parser) || parser->tok != '(') {
1440 parseerror(parser, "expected 'while' condition in parenthesis");
1444 /* parse into the expression */
1445 if (!parser_next(parser)) {
1446 parseerror(parser, "expected 'while' condition after opening paren");
1450 /* parse the condition */
1451 cond = parser_expression_leave(parser, false);
1455 if (parser->tok != ')') {
1456 parseerror(parser, "expected closing paren after 'while' condition");
1462 if (!parser_next(parser) || parser->tok != ';') {
1463 parseerror(parser, "expected semicolon after condition");
1469 if (!parser_next(parser)) {
1470 parseerror(parser, "parse error");
1476 aloop = ast_loop_new(ctx, NULL, NULL, cond, NULL, ontrue);
1477 *out = (ast_expression*)aloop;
1481 static bool parser_parse_for(parser_t *parser, ast_block *block, ast_expression **out)
1484 ast_expression *initexpr, *cond, *increment, *ontrue;
1485 size_t oldblocklocal;
1487 lex_ctx ctx = parser_ctx(parser);
1489 oldblocklocal = parser->blocklocal;
1490 parser->blocklocal = parser->locals_count;
1497 /* skip the 'while' and check for opening paren */
1498 if (!parser_next(parser) || parser->tok != '(') {
1499 parseerror(parser, "expected 'for' expressions in parenthesis");
1502 /* parse into the expression */
1503 if (!parser_next(parser)) {
1504 parseerror(parser, "expected 'for' initializer after opening paren");
1508 if (parser->tok == TOKEN_TYPENAME) {
1509 if (opts_standard != COMPILER_GMQCC) {
1510 if (parsewarning(parser, WARN_EXTENSIONS,
1511 "current standard does not allow variable declarations in for-loop initializers"))
1515 parseerror(parser, "TODO: assignment of new variables to be non-const");
1517 if (!parser_variable(parser, block))
1520 else if (parser->tok != ';')
1522 initexpr = parser_expression_leave(parser, false);
1527 /* move on to condition */
1528 if (parser->tok != ';') {
1529 parseerror(parser, "expected semicolon after for-loop initializer");
1532 if (!parser_next(parser)) {
1533 parseerror(parser, "expected for-loop condition");
1537 /* parse the condition */
1538 if (parser->tok != ';') {
1539 cond = parser_expression_leave(parser, false);
1544 /* move on to incrementor */
1545 if (parser->tok != ';') {
1546 parseerror(parser, "expected semicolon after for-loop initializer");
1549 if (!parser_next(parser)) {
1550 parseerror(parser, "expected for-loop condition");
1554 /* parse the incrementor */
1555 if (parser->tok != ')') {
1556 increment = parser_expression_leave(parser, false);
1562 if (parser->tok != ')') {
1563 parseerror(parser, "expected closing paren after 'for-loop' incrementor");
1566 /* parse into the 'then' branch */
1567 if (!parser_next(parser)) {
1568 parseerror(parser, "expected for-loop body");
1571 ontrue = parser_parse_statement_or_block(parser);
1576 aloop = ast_loop_new(ctx, initexpr, cond, NULL, increment, ontrue);
1577 *out = (ast_expression*)aloop;
1579 while (parser->locals_count > parser->blocklocal)
1580 parser_pop_local(parser);
1581 parser->blocklocal = oldblocklocal;
1584 if (initexpr) ast_delete(initexpr);
1585 if (cond) ast_delete(cond);
1586 if (increment) ast_delete(increment);
1587 while (parser->locals_count > parser->blocklocal)
1588 parser_pop_local(parser);
1589 parser->blocklocal = oldblocklocal;
1593 static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expression **out)
1595 if (parser->tok == TOKEN_TYPENAME)
1597 /* local variable */
1599 parseerror(parser, "cannot declare a variable from here");
1602 if (opts_standard == COMPILER_QCC) {
1603 if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
1606 if (!parser_variable(parser, block))
1611 else if (parser->tok == TOKEN_KEYWORD)
1613 if (!strcmp(parser_tokval(parser), "local"))
1616 parseerror(parser, "cannot declare a local variable here");
1619 if (!parser_next(parser)) {
1620 parseerror(parser, "expected variable declaration");
1623 if (!parser_variable(parser, block))
1628 else if (!strcmp(parser_tokval(parser), "return"))
1630 ast_expression *exp = NULL;
1631 ast_return *ret = NULL;
1632 ast_value *expected = parser->function->vtype;
1634 if (!parser_next(parser)) {
1635 parseerror(parser, "expected return expression");
1639 if (parser->tok != ';') {
1640 exp = parser_expression(parser, false);
1644 if (exp->expression.vtype != expected->expression.next->expression.vtype) {
1645 parseerror(parser, "return with invalid expression");
1648 ret = ast_return_new(exp->expression.node.context, exp);
1654 if (!parser_next(parser))
1655 parseerror(parser, "parse error");
1656 if (expected->expression.next->expression.vtype != TYPE_VOID) {
1657 if (opts_standard != COMPILER_GMQCC)
1658 (void)!parsewarning(parser, WARN_MISSING_RETURN_VALUES, "return without value");
1660 parseerror(parser, "return without value");
1662 ret = ast_return_new(parser_ctx(parser), NULL);
1664 *out = (ast_expression*)ret;
1667 else if (!strcmp(parser_tokval(parser), "if"))
1669 return parser_parse_if(parser, block, out);
1671 else if (!strcmp(parser_tokval(parser), "while"))
1673 return parser_parse_while(parser, block, out);
1675 else if (!strcmp(parser_tokval(parser), "do"))
1677 return parser_parse_dowhile(parser, block, out);
1679 else if (!strcmp(parser_tokval(parser), "for"))
1681 if (opts_standard == COMPILER_QCC) {
1682 if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
1685 return parser_parse_for(parser, block, out);
1687 parseerror(parser, "Unexpected keyword");
1690 else if (parser->tok == '{')
1693 inner = parser_parse_block(parser);
1696 *out = (ast_expression*)inner;
1701 ast_expression *exp = parser_expression(parser, false);
1709 static void parser_pop_local(parser_t *parser)
1711 parser->locals_count--;
1712 mem_d(parser->locals[parser->locals_count].name);
1715 static bool parser_parse_block_into(parser_t *parser, ast_block *block)
1717 size_t oldblocklocal;
1719 oldblocklocal = parser->blocklocal;
1720 parser->blocklocal = parser->locals_count;
1722 if (!parser_next(parser)) { /* skip the '{' */
1723 parseerror(parser, "expected function body");
1727 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
1729 ast_expression *expr;
1730 if (parser->tok == '}')
1733 if (!parser_parse_statement(parser, block, &expr)) {
1734 parseerror(parser, "parse error");
1740 if (!ast_block_exprs_add(block, expr)) {
1747 if (parser->tok != '}') {
1750 (void)parser_next(parser);
1754 while (parser->locals_count > parser->blocklocal)
1755 parser_pop_local(parser);
1756 parser->blocklocal = oldblocklocal;
1760 static ast_block* parser_parse_block(parser_t *parser)
1763 block = ast_block_new(parser_ctx(parser));
1766 if (!parser_parse_block_into(parser, block)) {
1767 ast_block_delete(block);
1773 static ast_expression* parser_parse_statement_or_block(parser_t *parser)
1775 ast_expression *expr = NULL;
1776 if (parser->tok == '{')
1777 return (ast_expression*)parser_parse_block(parser);
1778 if (!parser_parse_statement(parser, NULL, &expr))
1783 static bool create_vector_members(parser_t *parser, ast_value *var,
1784 varentry_t *vx, varentry_t *vy, varentry_t *vz)
1786 size_t len = strlen(var->name);
1787 vx->var = (ast_expression*)ast_member_new(ast_ctx(var), (ast_expression*)var, 0);
1789 parseerror(parser, "failed to create vector members (out of memory)");
1793 vy->var = (ast_expression*)ast_member_new(ast_ctx(var), (ast_expression*)var, 1);
1795 ast_delete(vx->var);
1796 parseerror(parser, "failed to create vector members (out of memory)");
1800 vz->var = (ast_expression*)ast_member_new(ast_ctx(var), (ast_expression*)var, 2);
1802 ast_delete(vy->var);
1803 ast_delete(vx->var);
1804 parseerror(parser, "failed to create vector members (out of memory)");
1808 if ( !(vx->name = (char*)mem_a(len+3)) ) {
1809 ast_delete(vz->var);
1810 ast_delete(vy->var);
1811 ast_delete(vx->var);
1812 parseerror(parser, "failed to create vector members (out of memory)");
1815 if ( !(vy->name = (char*)mem_a(len+3)) ) {
1817 ast_delete(vz->var);
1818 ast_delete(vy->var);
1819 ast_delete(vx->var);
1820 parseerror(parser, "failed to create vector members (out of memory)");
1823 if ( !(vz->name = (char*)mem_a(len+3)) ) {
1826 ast_delete(vz->var);
1827 ast_delete(vy->var);
1828 ast_delete(vx->var);
1829 parseerror(parser, "failed to create vector members (out of memory)");
1833 memcpy(vx->name, var->name, len);
1834 memcpy(vy->name, var->name, len);
1835 memcpy(vz->name, var->name, len);
1836 vx->name[len] = vy->name[len] = vz->name[len] = '_';
1837 vx->name[len+1] = 'x';
1838 vy->name[len+1] = 'y';
1839 vz->name[len+1] = 'z';
1840 vx->name[len+2] = vy->name[len+2] = vz->name[len+2] = 0;
1844 static bool parser_variable(parser_t *parser, ast_block *localblock)
1846 bool isfunc = false;
1847 ast_function *func = NULL;
1851 ast_expression *olddecl;
1856 int basetype = parser_token(parser)->constval.t;
1862 if (!parser_next(parser)) { /* skip basetype or comma */
1863 parseerror(parser, "expected variable declaration");
1871 ctx = parser_ctx(parser);
1872 var = parser_parse_type(parser, basetype, &isfunc);
1877 if (parser->tok != TOKEN_IDENT) {
1878 parseerror(parser, "expected variable name\n");
1883 if (!localblock && (olddecl = parser_find_global(parser, parser_tokval(parser)))) {
1884 ast_value_delete(var);
1885 parseerror(parser, "global `%s` already declared here: %s:%i",
1886 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1891 olddecl = parser_find_local(parser, parser_tokval(parser), parser->blocklocal, &isparam);
1892 if (opts_standard == COMPILER_GMQCC)
1897 ast_value_delete(var);
1898 parseerror(parser, "local `%s` already declared here: %s:%i",
1899 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1904 if( (!isparam && olddecl) || (olddecl = parser_find_local(parser, parser_tokval(parser), 0, &isparam)) )
1906 if (parsewarning(parser, WARN_LOCAL_SHADOWS,
1907 "local `%s` is shadowing a parameter", parser_tokval(parser)))
1909 ast_value_delete(var);
1910 parseerror(parser, "local `%s` already declared here: %s:%i",
1911 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1920 ast_value_delete(var);
1922 parsewarning(parser, WARN_LOCAL_SHADOWS,
1923 "a parameter is shadowing local `%s`", parser_tokval(parser)))
1929 parseerror(parser, "local `%s` already declared here: %s:%i",
1930 parser_tokval(parser), ast_ctx(olddecl).file, (int)ast_ctx(olddecl).line);
1939 if (!ast_value_set_name(var, parser_tokval(parser))) {
1940 parseerror(parser, "failed to set variable name\n");
1941 ast_value_delete(var);
1946 /* a function was defined */
1948 ast_value *proto = NULL;
1952 olddecl = parser_find_global(parser, parser_tokval(parser));
1954 olddecl = parser_find_local(parser, parser_tokval(parser), parser->blocklocal, &dummy);
1957 /* we had a prototype */
1958 if (!ast_istype(olddecl, ast_value)) {
1959 /* theoretically not possible you think?
1965 parseerror(parser, "cannot declare a function with the same name as a vector's member: %s",
1966 parser_tokval(parser));
1967 ast_value_delete(var);
1971 proto = (ast_value*)olddecl;
1974 /* turn var into a value of TYPE_FUNCTION, with the old var
1977 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
1978 func = ast_function_new(ctx, var->name, fval);
1979 if (!fval || !func) {
1980 ast_value_delete(var);
1981 if (fval) ast_value_delete(fval);
1982 if (func) ast_function_delete(func);
1986 fval->expression.next = (ast_expression*)var;
1987 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
1989 /* we compare the type late here, but it's easier than
1990 * messing with the parameter-vector etc. earlier
1994 if (!ast_compare_type((ast_expression*)proto, (ast_expression*)fval)) {
1995 parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
1997 ast_ctx(proto).file, ast_ctx(proto).line);
1998 ast_function_delete(func);
1999 ast_value_delete(fval);
2002 /* copy over the parameter names */
2003 for (param = 0; param < fval->expression.params_count; ++param)
2004 ast_value_set_name(proto->expression.params[param], fval->expression.params[param]->name);
2006 /* now ditch the rest of the new data */
2007 ast_function_delete(func);
2008 ast_value_delete(fval);
2010 func = proto->constval.vfunc;
2015 if (!parser_t_functions_add(parser, func)) {
2016 ast_function_delete(func);
2017 ast_value_delete(fval);
2026 varent.name = util_strdup(var->name);
2027 varent.var = (ast_expression*)var;
2028 if (var->expression.vtype == TYPE_VECTOR)
2030 varentry_t vx, vy, vz;
2031 if (!create_vector_members(parser, var, &vx, &vy, &vz)) {
2037 (void)!parser_t_globals_add(parser, varent);
2038 (void)!parser_t_globals_add(parser, vx);
2039 (void)!parser_t_globals_add(parser, vy);
2040 (void)!parser_t_globals_add(parser, vz);
2042 (void)!parser_t_locals_add(parser, varent);
2043 (void)!parser_t_locals_add(parser, vx);
2044 (void)!parser_t_locals_add(parser, vy);
2045 (void)!parser_t_locals_add(parser, vz);
2046 if (!ast_block_locals_add(localblock, var) ||
2047 !ast_block_collect(localblock, vx.var) ||
2048 !ast_block_collect(localblock, vy.var) ||
2049 !ast_block_collect(localblock, vz.var))
2051 parser_pop_local(parser);
2052 parser_pop_local(parser);
2053 parser_pop_local(parser);
2054 parser_pop_local(parser);
2055 ast_value_delete(var);
2062 if ( (!localblock && !parser_t_globals_add(parser, varent)) ||
2063 ( localblock && !parser_t_locals_add(parser, varent)) )
2065 ast_value_delete(var);
2068 if (localblock && !ast_block_locals_add(localblock, var))
2070 parser_pop_local(parser);
2071 ast_value_delete(var);
2078 if (!parser_next(parser)) {
2079 ast_value_delete(var);
2083 if (parser->tok == ';') {
2084 if (!parser_next(parser))
2085 return parser->tok == TOKEN_EOF;
2089 if (parser->tok == ',') {
2094 if (parser->tok != '=') {
2095 parseerror(parser, "expected '=' or ';'");
2099 if (!parser_next(parser))
2102 if (parser->tok == '#') {
2104 parseerror(parser, "cannot declare builtins within functions");
2107 if (!isfunc || !func) {
2108 parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
2111 if (!parser_next(parser)) {
2112 parseerror(parser, "expected builtin number");
2115 if (parser->tok != TOKEN_INTCONST) {
2116 parseerror(parser, "builtin number must be an integer constant");
2119 if (parser_token(parser)->constval.i <= 0) {
2120 parseerror(parser, "builtin number must be positive integer greater than zero");
2124 func->builtin = -parser_token(parser)->constval.i;
2126 if (!parser_next(parser))
2128 } else if (parser->tok == '{' || parser->tok == '[') {
2134 ast_expression *fld_think, *fld_nextthink, *fld_frame;
2135 ast_expression *gbl_time, *gbl_self;
2136 ast_expression *framenum, *nextthink;
2137 bool has_frame_think;
2139 has_frame_think = false;
2140 old = parser->function;
2143 parseerror(parser, "cannot declare functions within functions");
2147 if (parser->tok == '[') {
2148 /* got a frame definition: [ framenum, nextthink ]
2149 * this translates to:
2150 * self.frame = framenum;
2151 * self.nextthink = time + 0.1;
2152 * self.think = nextthink;
2156 fld_think = parser_find_field(parser, "think");
2157 fld_nextthink = parser_find_field(parser, "nextthink");
2158 fld_frame = parser_find_field(parser, "frame");
2159 if (!fld_think || !fld_nextthink || !fld_frame) {
2160 parseerror(parser, "cannot use [frame,think] notation without the required fields");
2161 parseerror(parser, "please declare the following entityfields: `frame`, `think`, `nextthink`");
2164 gbl_time = parser_find_global(parser, "time");
2165 gbl_self = parser_find_global(parser, "self");
2166 if (!gbl_time || !gbl_self) {
2167 parseerror(parser, "cannot use [frame,think] notation without the required globals");
2168 parseerror(parser, "please declare the following globals: `time`, `self`");
2172 if (!parser_next(parser)) {
2176 framenum = parser_expression_leave(parser, true);
2178 parseerror(parser, "expected a framenumber constant in[frame,think] notation");
2181 if (!ast_istype(framenum, ast_value) || !( (ast_value*)framenum )->isconst) {
2182 ast_unref(framenum);
2183 parseerror(parser, "framenumber in [frame,think] notation must be a constant");
2186 if (parser->tok != ',') {
2187 ast_unref(framenum);
2188 parseerror(parser, "expected comma after frame number in [frame,think] notation");
2189 parseerror(parser, "Got a %i\n", parser->tok);
2193 if (!parser_next(parser)) {
2194 ast_unref(framenum);
2198 if (parser->tok == TOKEN_IDENT && !parser_find_var(parser, parser_tokval(parser)))
2200 /* qc allows the use of not-yet-declared functions here
2201 * - this automatically creates a prototype */
2203 ast_value *thinkfunc;
2204 ast_expression *functype = fld_think->expression.next;
2206 thinkfunc = ast_value_new(parser_ctx(parser), parser_tokval(parser), functype->expression.vtype);
2207 if (!thinkfunc || !ast_type_adopt(nextthink, functype)) {
2208 ast_unref(framenum);
2209 parseerror(parser, "failed to create implicit prototype for `%s`", parser_tokval(parser));
2213 if (!parser_next(parser)) {
2214 ast_unref(framenum);
2218 varent.var = (ast_expression*)thinkfunc;
2219 varent.name = util_strdup(thinkfunc->name);
2220 if (nextthink->expression.vtype == TYPE_FUNCTION)
2224 func = ast_function_new(parser_ctx(parser), thinkfunc->name, thinkfunc);
2226 ast_delete(nextthink);
2227 ast_unref(framenum);
2228 parseerror(parser, "failed to create function for implicit prototype for `%s`",
2232 (void)!parser_t_functions_add(parser, func);
2233 (void)!parser_t_globals_add(parser, varent);
2236 (void)!parser_t_globals_add(parser, varent);
2237 nextthink = (ast_expression*)thinkfunc;
2240 nextthink = parser_expression_leave(parser, true);
2242 ast_unref(framenum);
2243 parseerror(parser, "expected a think-function in [frame,think] notation");
2248 if (!ast_istype(nextthink, ast_value) || !( (ast_value*)nextthink )->isconst) {
2249 ast_unref(nextthink);
2250 ast_unref(framenum);
2251 parseerror(parser, "think-function in [frame,think] notation must be a constant");
2254 if (parser->tok != ']') {
2255 parseerror(parser, "expected closing `]` for [frame,think] notation");
2256 ast_unref(nextthink);
2257 ast_unref(framenum);
2261 if (!parser_next(parser)) {
2262 ast_unref(nextthink);
2263 ast_unref(framenum);
2267 if (parser->tok != '{') {
2268 parseerror(parser, "a function body has to be declared after a [frame,think] declaration");
2269 ast_unref(nextthink);
2270 ast_unref(framenum);
2274 has_frame_think = true;
2277 block = ast_block_new(parser_ctx(parser));
2279 parseerror(parser, "failed to allocate block");
2283 if (has_frame_think) {
2285 ast_expression *self_frame;
2286 ast_expression *self_nextthink;
2287 ast_expression *self_think;
2288 ast_expression *time_plus_1;
2289 ast_store *store_frame;
2290 ast_store *store_nextthink;
2291 ast_store *store_think;
2293 ctx = parser_ctx(parser);
2294 self_frame = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_frame);
2295 self_nextthink = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_nextthink);
2296 self_think = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_think);
2298 time_plus_1 = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F,
2299 gbl_time, (ast_expression*)parser_const_float(parser, 0.1));
2301 store_frame = ast_store_new(ctx, INSTR_STOREP_F, self_frame, framenum);
2302 store_nextthink = ast_store_new(ctx, INSTR_STOREP_F, self_nextthink, time_plus_1);
2303 store_think = ast_store_new(ctx, INSTR_STOREP_FNC, self_think, nextthink);
2305 if (!ast_block_exprs_add(block, (ast_expression*)store_frame) ||
2306 !ast_block_exprs_add(block, (ast_expression*)store_nextthink) ||
2307 !ast_block_exprs_add(block, (ast_expression*)store_think) )
2309 parseerror(parser, "failed to generate code for [frame,think]");
2310 ast_block_delete(block);
2315 for (parami = 0; parami < var->expression.params_count; ++parami) {
2316 ast_value *param = var->expression.params[parami];
2317 varentry_t vx, vy, vz;
2319 if (param->expression.vtype != TYPE_VECTOR &&
2320 (param->expression.vtype != TYPE_FIELD ||
2321 param->expression.next->expression.vtype != TYPE_VECTOR))
2326 if (!create_vector_members(parser, param, &vx, &vy, &vz)) {
2327 ast_block_delete(block);
2331 (void)!parser_t_locals_add(parser, vx);
2332 (void)!parser_t_locals_add(parser, vy);
2333 (void)!parser_t_locals_add(parser, vz);
2334 if (!ast_block_collect(block, vx.var) ||
2335 !ast_block_collect(block, vy.var) ||
2336 !ast_block_collect(block, vz.var) )
2338 parser_pop_local(parser);
2339 parser_pop_local(parser);
2340 parser_pop_local(parser);
2341 ast_block_delete(block);
2346 parser->function = func;
2347 if (!parser_parse_block_into(parser, block)) {
2348 ast_block_delete(block);
2349 parser->function = old;
2352 parser->function = old;
2357 if (!ast_function_blocks_add(func, block)) {
2358 ast_block_delete(block);
2362 if (parser->tok == ';')
2363 return parser_next(parser) || parser->tok == TOKEN_EOF;
2364 else if (opts_standard == COMPILER_QCC)
2365 parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
2368 ast_expression *cexp;
2371 cexp = parser_expression_leave(parser, true);
2372 cval = (ast_value*)cexp;
2373 if (!ast_istype(cval, ast_value) || !cval->isconst)
2374 parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
2377 var->isconst = true;
2378 memcpy(&var->constval, &cval->constval, sizeof(var->constval));
2379 memset(&cval->constval, 0, sizeof(cval->constval));
2384 if (parser->tok == ',') {
2389 if (parser->tok != ';') {
2390 parseerror(parser, "missing semicolon");
2394 (void)parser_next(parser);
2400 static bool parser_do(parser_t *parser)
2402 if (parser->tok == TOKEN_TYPENAME)
2404 return parser_variable(parser, NULL);
2406 else if (parser->tok == TOKEN_KEYWORD)
2408 /* handle 'var' and 'const' */
2411 else if (parser->tok == '.')
2416 ast_expression *oldex;
2417 bool isfunc = false;
2419 lex_ctx ctx = parser_ctx(parser);
2422 /* entity-member declaration */
2423 if (!parser_next(parser) || parser->tok != TOKEN_TYPENAME) {
2424 parseerror(parser, "expected member variable definition");
2428 /* remember the base/return type */
2429 basetype = parser_token(parser)->constval.t;
2431 /* parse into the declaration */
2432 if (!parser_next(parser)) {
2433 parseerror(parser, "expected field def");
2437 /* parse the field type fully */
2438 typevar = var = parser_parse_type(parser, basetype, &isfunc);
2443 var = ast_value_copy(typevar);
2444 /* now the field name */
2445 if (parser->tok != TOKEN_IDENT) {
2446 parseerror(parser, "expected field name");
2451 /* check for an existing field
2452 * in original qc we also have to check for an existing
2453 * global named like the field
2455 if (opts_standard == COMPILER_QCC) {
2456 if (parser_find_global(parser, parser_tokval(parser))) {
2457 parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
2465 fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
2467 ast_value_delete(var);
2470 fval->expression.next = (ast_expression*)var;
2471 MEM_VECTOR_MOVE(&var->expression, params, &fval->expression, params);
2475 /* turn it into a field */
2476 fld = ast_value_new(ctx, parser_tokval(parser), TYPE_FIELD);
2477 fld->expression.next = (ast_expression*)var;
2479 if ( (oldex = parser_find_field(parser, parser_tokval(parser)))) {
2480 if (ast_istype(oldex, ast_member)) {
2481 parseerror(parser, "cannot declare a field with the same name as a vector component, component %s has been declared here: %s:%i",
2482 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line);
2486 if (!ast_istype(oldex, ast_value)) {
2487 /* not possible / sanity check */
2488 parseerror(parser, "internal error: %s is not an ast_value", parser_tokval(parser));
2493 if (!ast_compare_type(oldex, (ast_expression*)fld)) {
2494 parseerror(parser, "field %s has previously been declared with a different type here: %s:%i",
2495 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line);
2499 if (parsewarning(parser, WARN_FIELD_REDECLARED, "field %s has already been declared here: %s:%i",
2500 parser_tokval(parser), ast_ctx(oldex).file, (int)ast_ctx(oldex).line))
2511 varent.var = (ast_expression*)fld;
2512 varent.name = util_strdup(fld->name);
2513 (void)!parser_t_fields_add(parser, varent);
2515 if (var->expression.vtype == TYPE_VECTOR)
2517 /* create _x, _y and _z fields as well */
2518 varentry_t vx, vy, vz;
2519 if (!create_vector_members(parser, fld, &vx, &vy, &vz)) {
2523 (void)!parser_t_fields_add(parser, vx);
2524 (void)!parser_t_fields_add(parser, vy);
2525 (void)!parser_t_fields_add(parser, vz);
2529 if (!parser_next(parser)) {
2530 parseerror(parser, "expected semicolon or another field name");
2533 if (parser->tok == ';')
2535 if (parser->tok != ',' || !parser_next(parser)) {
2536 parseerror(parser, "expected semicolon or another field name");
2540 ast_delete(typevar);
2542 /* skip the semicolon */
2543 if (!parser_next(parser))
2544 return parser->tok == TOKEN_EOF;
2548 else if (parser->tok == '$')
2550 if (!parser_next(parser)) {
2551 parseerror(parser, "parse error");
2557 parseerror(parser, "unexpected token: %s", parser->lex->tok->value);
2563 static parser_t *parser;
2567 parser = (parser_t*)mem_a(sizeof(parser_t));
2571 memset(parser, 0, sizeof(*parser));
2575 bool parser_compile(const char *filename)
2577 parser->lex = lex_open(filename);
2579 printf("failed to open file \"%s\"\n", filename);
2583 /* initial lexer/parser state */
2584 parser->lex->flags.noops = true;
2586 if (parser_next(parser))
2588 while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
2590 if (!parser_do(parser)) {
2591 if (parser->tok == TOKEN_EOF)
2592 parseerror(parser, "unexpected eof");
2593 else if (!parser->errors)
2594 parseerror(parser, "parse error\n");
2595 lex_close(parser->lex);
2602 lex_close(parser->lex);
2605 return !parser->errors;
2608 void parser_cleanup()
2611 for (i = 0; i < parser->functions_count; ++i) {
2612 ast_delete(parser->functions[i]);
2614 for (i = 0; i < parser->imm_vector_count; ++i) {
2615 ast_delete(parser->imm_vector[i]);
2617 for (i = 0; i < parser->imm_string_count; ++i) {
2618 ast_delete(parser->imm_string[i]);
2620 for (i = 0; i < parser->imm_float_count; ++i) {
2621 ast_delete(parser->imm_float[i]);
2623 for (i = 0; i < parser->fields_count; ++i) {
2624 ast_delete(parser->fields[i].var);
2625 mem_d(parser->fields[i].name);
2627 for (i = 0; i < parser->globals_count; ++i) {
2628 ast_delete(parser->globals[i].var);
2629 mem_d(parser->globals[i].name);
2631 MEM_VECTOR_CLEAR(parser, functions);
2632 MEM_VECTOR_CLEAR(parser, imm_vector);
2633 MEM_VECTOR_CLEAR(parser, imm_string);
2634 MEM_VECTOR_CLEAR(parser, imm_float);
2635 MEM_VECTOR_CLEAR(parser, globals);
2636 MEM_VECTOR_CLEAR(parser, fields);
2637 MEM_VECTOR_CLEAR(parser, locals);
2642 bool parser_finish(const char *output)
2647 if (!parser->errors)
2649 ir = ir_builder_new("gmqcc_out");
2651 printf("failed to allocate builder\n");
2655 for (i = 0; i < parser->imm_float_count; ++i) {
2656 if (!ast_global_codegen(parser->imm_float[i], ir)) {
2657 printf("failed to generate global %s\n", parser->imm_float[i]->name);
2658 ir_builder_delete(ir);
2662 for (i = 0; i < parser->imm_string_count; ++i) {
2663 if (!ast_global_codegen(parser->imm_string[i], ir)) {
2664 printf("failed to generate global %s\n", parser->imm_string[i]->name);
2665 ir_builder_delete(ir);
2669 for (i = 0; i < parser->imm_vector_count; ++i) {
2670 if (!ast_global_codegen(parser->imm_vector[i], ir)) {
2671 printf("failed to generate global %s\n", parser->imm_vector[i]->name);
2672 ir_builder_delete(ir);
2676 for (i = 0; i < parser->fields_count; ++i) {
2679 if (!ast_istype(parser->fields[i].var, ast_value))
2681 field = (ast_value*)parser->fields[i].var;
2682 isconst = field->isconst;
2683 field->isconst = false;
2684 if (!ast_global_codegen((ast_value*)field, ir)) {
2685 printf("failed to generate field %s\n", field->name);
2686 ir_builder_delete(ir);
2691 ast_expression *subtype;
2692 field->isconst = true;
2693 subtype = field->expression.next;
2694 ifld = ir_builder_create_field(ir, field->name, subtype->expression.vtype);
2695 if (subtype->expression.vtype == TYPE_FIELD)
2696 ifld->fieldtype = subtype->expression.next->expression.vtype;
2697 else if (subtype->expression.vtype == TYPE_FUNCTION)
2698 ifld->outtype = subtype->expression.next->expression.vtype;
2699 (void)!ir_value_set_field(field->ir_v, ifld);
2702 for (i = 0; i < parser->globals_count; ++i) {
2703 if (!ast_istype(parser->globals[i].var, ast_value))
2705 if (!ast_global_codegen((ast_value*)(parser->globals[i].var), ir)) {
2706 printf("failed to generate global %s\n", parser->globals[i].name);
2707 ir_builder_delete(ir);
2711 for (i = 0; i < parser->functions_count; ++i) {
2712 if (!ast_function_codegen(parser->functions[i], ir)) {
2713 printf("failed to generate function %s\n", parser->functions[i]->name);
2714 ir_builder_delete(ir);
2717 if (!ir_function_finalize(parser->functions[i]->ir_func)) {
2718 printf("failed to finalize function %s\n", parser->functions[i]->name);
2719 ir_builder_delete(ir);
2725 ir_builder_dump(ir, printf);
2727 if (!ir_builder_generate(ir, output)) {
2728 printf("*** failed to generate output file\n");
2729 ir_builder_delete(ir);
2733 ir_builder_delete(ir);
2737 printf("*** there were compile errors\n");