mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-30 16:10:53 +00:00
2664 lines
63 KiB
C
2664 lines
63 KiB
C
/*
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expr.c
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expression construction and manipulations
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2001/06/15
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include "QF/alloc.h"
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#include "QF/dstring.h"
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#include "QF/mathlib.h"
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#include "QF/sys.h"
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#include "QF/va.h"
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#include "qfcc.h"
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#include "class.h"
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#include "def.h"
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#include "defspace.h"
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#include "diagnostic.h"
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#include "emit.h"
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#include "expr.h"
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#include "function.h"
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#include "idstuff.h"
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#include "method.h"
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#include "options.h"
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#include "reloc.h"
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#include "shared.h"
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#include "strpool.h"
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#include "struct.h"
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#include "symtab.h"
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#include "type.h"
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#include "value.h"
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#include "qc-parse.h"
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static expr_t *exprs_freelist;
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void
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convert_name (expr_t *e)
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{
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symbol_t *sym;
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expr_t *new;
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if (e->type != ex_symbol)
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return;
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sym = e->e.symbol;
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if (!strcmp (sym->name, "__PRETTY_FUNCTION__")
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&& current_func) {
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new = new_string_expr (current_func->name);
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goto convert;
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}
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if (!strcmp (sym->name, "__FUNCTION__")
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&& current_func) {
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new = new_string_expr (current_func->def->name);
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goto convert;
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}
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if (!strcmp (sym->name, "__LINE__")
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&& current_func) {
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new = new_integer_expr (e->line);
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goto convert;
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}
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if (!strcmp (sym->name, "__INFINITY__")
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&& current_func) {
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new = new_float_expr (INFINITY);
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goto convert;
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}
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if (!strcmp (sym->name, "__FILE__")
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&& current_func) {
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new = new_string_expr (GETSTR (e->file));
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goto convert;
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}
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if (!sym->table) {
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error (e, "%s undefined", sym->name);
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sym->type = type_default;
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//FIXME need a def
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return;
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}
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if (sym->sy_type == sy_expr) {
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new = copy_expr (sym->s.expr);
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goto convert;
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}
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if (sym->sy_type == sy_type)
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internal_error (e, "unexpected typedef");
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// var, const and func shouldn't need extra handling
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return;
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convert:
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e->type = new->type;
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e->e = new->e;
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}
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expr_t *
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convert_vector (expr_t *e)
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{
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float val[4];
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if (e->type != ex_vector)
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return e;
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if (e->e.vector.type == &type_vector) {
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// guaranteed to have three elements
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expr_t *x = e->e.vector.list;
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expr_t *y = x->next;
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expr_t *z = y->next;
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x = fold_constants (cast_expr (&type_float, x));
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y = fold_constants (cast_expr (&type_float, y));
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z = fold_constants (cast_expr (&type_float, z));
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if (is_constant (x) && is_constant (y) && is_constant (z)) {
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val[0] = expr_float(x);
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val[1] = expr_float(y);
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val[2] = expr_float(z);
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return new_vector_expr (val);
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}
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// at least one of x, y, z is not constant, so rebuild the
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// list incase any of them are new expressions
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z->next = 0;
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y->next = z;
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x->next = y;
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e->e.vector.list = x;
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return e;
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}
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if (e->e.vector.type == &type_quaternion) {
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// guaranteed to have two or four elements
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if (e->e.vector.list->next->next) {
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// four vals: x, y, z, w
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expr_t *x = e->e.vector.list;
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expr_t *y = x->next;
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expr_t *z = y->next;
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expr_t *w = z->next;
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x = fold_constants (cast_expr (&type_float, x));
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y = fold_constants (cast_expr (&type_float, y));
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z = fold_constants (cast_expr (&type_float, z));
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w = fold_constants (cast_expr (&type_float, w));
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if (is_constant (x) && is_constant (y) && is_constant (z)
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&& is_constant (w)) {
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val[0] = expr_float(x);
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val[1] = expr_float(y);
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val[2] = expr_float(z);
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val[3] = expr_float(w);
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return new_quaternion_expr (val);
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}
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// at least one of x, y, z, w is not constant, so rebuild the
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// list incase any of them are new expressions
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w->next = 0;
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z->next = w;
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y->next = z;
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x->next = y;
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e->e.vector.list = x;
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return e;
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} else {
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// v, s
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expr_t *v = e->e.vector.list;
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expr_t *s = v->next;
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v = convert_vector (v);
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s = fold_constants (cast_expr (&type_float, s));
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if (is_constant (v) && is_constant (s)) {
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memcpy (val, expr_vector (v), 3 * sizeof (float));
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val[3] = expr_float (s);
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return new_quaternion_expr (val);
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}
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// Either v or s is not constant, so can't convert to a quaternion
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// constant.
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// Rebuild the list in case v or s is a new expression
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// the list will always be v, s
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s->next = 0;
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v->next = s;
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e->e.vector.list = v;
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return e;
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}
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}
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internal_error (e, "bogus vector expression");
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}
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type_t *
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get_type (expr_t *e)
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{
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convert_name (e);
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switch (e->type) {
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case ex_labelref:
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return &type_void;
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case ex_label:
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case ex_error:
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return 0; // something went very wrong
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case ex_bool:
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if (options.code.progsversion == PROG_ID_VERSION)
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return &type_float;
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return &type_integer;
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case ex_nil:
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case ex_state:
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return &type_void;
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case ex_block:
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if (e->e.block.result)
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return get_type (e->e.block.result);
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return &type_void;
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case ex_expr:
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case ex_uexpr:
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return e->e.expr.type;
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case ex_symbol:
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return e->e.symbol->type;
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case ex_temp:
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return e->e.temp.type;
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case ex_value:
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return e->e.value->type;
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case ex_vector:
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return e->e.vector.type;
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}
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return 0;
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}
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etype_t
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extract_type (expr_t *e)
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{
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type_t *type = get_type (e);
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if (type)
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return type->type;
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return ev_type_count;
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}
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expr_t *
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type_mismatch (expr_t *e1, expr_t *e2, int op)
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{
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dstring_t *t1 = dstring_newstr ();
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dstring_t *t2 = dstring_newstr ();
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print_type_str (t1, get_type (e1));
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print_type_str (t2, get_type (e2));
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e1 = error (e1, "type mismatch: %s %s %s",
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t1->str, get_op_string (op), t2->str);
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dstring_delete (t1);
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dstring_delete (t2);
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return e1;
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}
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expr_t *
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param_mismatch (expr_t *e, int param, const char *fn, type_t *t1, type_t *t2)
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{
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dstring_t *s1 = dstring_newstr ();
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dstring_t *s2 = dstring_newstr ();
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print_type_str (s1, t1);
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print_type_str (s2, t2);
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e = error (e, "type mismatch for parameter %d of %s: expected %s, got %s",
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param, fn, s1->str, s2->str);
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dstring_delete (s1);
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dstring_delete (s2);
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return e;
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}
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expr_t *
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cast_error (expr_t *e, type_t *t1, type_t *t2)
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{
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dstring_t *s1 = dstring_newstr ();
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dstring_t *s2 = dstring_newstr ();
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print_type_str (s1, t1);
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print_type_str (s2, t2);
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e = error (e, "cannot cast from %s to %s", s1->str, s2->str);
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dstring_delete (s1);
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dstring_delete (s2);
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return e;
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}
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expr_t *
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test_error (expr_t *e, type_t *t)
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{
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dstring_t *s = dstring_newstr ();
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print_type_str (s, t);
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e = error (e, "%s cannot be tested", s->str);
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dstring_delete (s);
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return e;
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}
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expr_t *
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new_expr (void)
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{
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expr_t *e;
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ALLOC (16384, expr_t, exprs, e);
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e->line = pr.source_line;
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e->file = pr.source_file;
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return e;
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}
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expr_t *
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copy_expr (expr_t *e)
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{
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expr_t *n;
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expr_t *t;
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||
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if (!e)
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return 0;
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switch (e->type) {
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case ex_error:
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||
case ex_symbol:
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||
case ex_nil:
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||
case ex_value:
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// nothing to do here
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||
n = new_expr ();
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*n = *e;
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||
n->line = pr.source_line;
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n->file = pr.source_file;
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return n;
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||
case ex_state:
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return new_state_expr (copy_expr (e->e.state.frame),
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copy_expr (e->e.state.think),
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copy_expr (e->e.state.step));
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||
case ex_bool:
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||
n = new_expr ();
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*n = *e;
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||
n->line = pr.source_line;
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n->file = pr.source_file;
|
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if (e->e.bool.true_list) {
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||
int count = e->e.bool.true_list->size;
|
||
size_t size = (size_t)&((ex_list_t *) 0)->e[count];
|
||
n->e.bool.true_list = malloc (size);
|
||
while (count--)
|
||
n->e.bool.true_list->e[count] =
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||
copy_expr (e->e.bool.true_list->e[count]);
|
||
}
|
||
if (e->e.bool.false_list) {
|
||
int count = e->e.bool.false_list->size;
|
||
size_t size = (size_t)&((ex_list_t *) 0)->e[count];
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||
n->e.bool.false_list = malloc (size);
|
||
while (count--)
|
||
n->e.bool.false_list->e[count] =
|
||
copy_expr (e->e.bool.false_list->e[count]);
|
||
}
|
||
n->e.bool.e = copy_expr (e->e.bool.e);
|
||
return n;
|
||
case ex_label:
|
||
/// Create a fresh label
|
||
return new_label_expr ();
|
||
case ex_labelref:
|
||
return new_label_ref (e->e.labelref.label);
|
||
case ex_block:
|
||
n = new_expr ();
|
||
*n = *e;
|
||
n->line = pr.source_line;
|
||
n->file = pr.source_file;
|
||
n->e.block.head = 0;
|
||
n->e.block.tail = &n->e.block.head;
|
||
n->e.block.result = 0;
|
||
for (t = e->e.block.head; t; t = t->next) {
|
||
if (t == e->e.block.result) {
|
||
n->e.block.result = copy_expr (t);
|
||
append_expr (n, n->e.block.result);
|
||
} else {
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||
append_expr (n, copy_expr (t));
|
||
}
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||
}
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||
if (e->e.block.result && !n->e.block.result)
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||
internal_error (e, "bogus block result?");
|
||
break;
|
||
case ex_expr:
|
||
n = new_expr ();
|
||
*n = *e;
|
||
n->line = pr.source_line;
|
||
n->file = pr.source_file;
|
||
n->e.expr.e1 = copy_expr (e->e.expr.e1);
|
||
n->e.expr.e2 = copy_expr (e->e.expr.e2);
|
||
return n;
|
||
case ex_uexpr:
|
||
n = new_expr ();
|
||
*n = *e;
|
||
n->line = pr.source_line;
|
||
n->file = pr.source_file;
|
||
n->e.expr.e1 = copy_expr (e->e.expr.e1);
|
||
return n;
|
||
case ex_temp:
|
||
n = new_expr ();
|
||
*n = *e;
|
||
n->line = pr.source_line;
|
||
n->file = pr.source_file;
|
||
return n;
|
||
case ex_vector:
|
||
n = new_expr ();
|
||
n->e.vector.type = e->e.vector.type;
|
||
n->e.vector.list = copy_expr (e->e.vector.list);
|
||
n = n->e.vector.list;
|
||
t = e->e.vector.list;
|
||
while (t->next) {
|
||
n->next = copy_expr (t->next);
|
||
n = n->next;
|
||
t = t->next;
|
||
}
|
||
return n;
|
||
}
|
||
internal_error (e, "invalid expression");
|
||
}
|
||
|
||
const char *
|
||
new_label_name (void)
|
||
{
|
||
static int label = 0;
|
||
int lnum = ++label;
|
||
const char *fname = current_func->sym->name;
|
||
char *lname;
|
||
|
||
lname = nva ("$%s_%d", fname, lnum);
|
||
SYS_CHECKMEM (lname);
|
||
return lname;
|
||
}
|
||
|
||
static expr_t *
|
||
new_error_expr (void)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_error;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_state_expr (expr_t *frame, expr_t *think, expr_t *step)
|
||
{
|
||
expr_t *s = new_expr ();
|
||
|
||
s->type = ex_state;
|
||
s->e.state.frame = frame;
|
||
s->e.state.think = think;
|
||
s->e.state.step = step;
|
||
return s;
|
||
}
|
||
|
||
expr_t *
|
||
new_bool_expr (ex_list_t *true_list, ex_list_t *false_list, expr_t *e)
|
||
{
|
||
expr_t *b = new_expr ();
|
||
|
||
b->type = ex_bool;
|
||
b->e.bool.true_list = true_list;
|
||
b->e.bool.false_list = false_list;
|
||
b->e.bool.e = e;
|
||
return b;
|
||
}
|
||
|
||
expr_t *
|
||
new_label_expr (void)
|
||
{
|
||
|
||
expr_t *l = new_expr ();
|
||
|
||
l->type = ex_label;
|
||
l->e.label.name = new_label_name ();
|
||
return l;
|
||
}
|
||
|
||
expr_t *
|
||
new_label_ref (ex_label_t *label)
|
||
{
|
||
|
||
expr_t *l = new_expr ();
|
||
|
||
l->type = ex_labelref;
|
||
l->e.labelref.label = label;
|
||
label->used++;
|
||
return l;
|
||
}
|
||
|
||
expr_t *
|
||
new_block_expr (void)
|
||
{
|
||
expr_t *b = new_expr ();
|
||
|
||
b->type = ex_block;
|
||
b->e.block.head = 0;
|
||
b->e.block.tail = &b->e.block.head;
|
||
return b;
|
||
}
|
||
|
||
expr_t *
|
||
new_binary_expr (int op, expr_t *e1, expr_t *e2)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
|
||
if (e1->type == ex_error)
|
||
return e1;
|
||
if (e2 && e2->type == ex_error)
|
||
return e2;
|
||
|
||
e->type = ex_expr;
|
||
e->e.expr.op = op;
|
||
e->e.expr.e1 = e1;
|
||
e->e.expr.e2 = e2;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
build_block_expr (expr_t *expr_list)
|
||
{
|
||
expr_t *b = new_block_expr ();
|
||
|
||
while (expr_list) {
|
||
expr_t *e = expr_list;
|
||
expr_list = e->next;
|
||
e->next = 0;
|
||
append_expr (b, e);
|
||
}
|
||
return b;
|
||
}
|
||
|
||
expr_t *
|
||
new_unary_expr (int op, expr_t *e1)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
|
||
if (e1 && e1->type == ex_error)
|
||
return e1;
|
||
|
||
e->type = ex_uexpr;
|
||
e->e.expr.op = op;
|
||
e->e.expr.e1 = e1;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_symbol_expr (symbol_t *symbol)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_symbol;
|
||
e->e.symbol = symbol;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_temp_def_expr (type_t *type)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
|
||
e->type = ex_temp;
|
||
e->e.temp.type = type;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_nil_expr (void)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_nil;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_value_expr (ex_value_t *value)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = value;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_name_expr (const char *name)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
symbol_t *sym;
|
||
|
||
sym = symtab_lookup (current_symtab, name);
|
||
if (!sym)
|
||
sym = new_symbol (name);
|
||
e->type = ex_symbol;
|
||
e->e.symbol = sym;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_string_expr (const char *string_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_string_val (string_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_double_expr (double double_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_double_val (double_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_float_expr (float float_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_float_val (float_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_vector_expr (const float *vector_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_vector_val (vector_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_vector_list (expr_t *e)
|
||
{
|
||
expr_t *t;
|
||
int count;
|
||
type_t *type = &type_vector;
|
||
expr_t *vec;
|
||
|
||
e = reverse_expr_list (e); // put the elements in the right order
|
||
for (t = e, count = 0; t; t = t->next)
|
||
count++;
|
||
switch (count) {
|
||
case 4:
|
||
type = &type_quaternion;
|
||
case 3:
|
||
// quaternion or vector. all expressions must be compatible with
|
||
// a float (ie, a scalar)
|
||
for (t = e; t; t = t->next)
|
||
if (!is_scalar (get_type (t)))
|
||
return error (t, "invalid type for vector element");
|
||
vec = new_expr ();
|
||
vec->type = ex_vector;
|
||
vec->e.vector.type = type;
|
||
vec->e.vector.list = e;
|
||
break;
|
||
case 2:
|
||
if (is_scalar (get_type (e)) && is_scalar (get_type (e->next))) {
|
||
// scalar, scalar
|
||
// expand [x, y] to [x, y, 0]
|
||
e->next->next = new_float_expr (0);
|
||
vec = new_expr ();
|
||
vec->type = ex_vector;
|
||
vec->e.vector.type = type;
|
||
vec->e.vector.list = e;
|
||
break;
|
||
}
|
||
// quaternion. either scalar, vector or vector, scalar
|
||
if (is_scalar (get_type (e))
|
||
&& is_vector (get_type (e->next))) {
|
||
// scalar, vector
|
||
// swap expressions
|
||
t = e;
|
||
e = e->next;
|
||
e->next = t;
|
||
t->next = 0;
|
||
} else if (is_vector (get_type (e))
|
||
&& is_scalar (get_type (e->next))) {
|
||
// vector, scalar
|
||
// do nothing
|
||
} else {
|
||
return error (t, "invalid types for vector elements");
|
||
}
|
||
// v, s
|
||
vec = new_expr ();
|
||
vec->type = ex_vector;
|
||
vec->e.vector.type = &type_quaternion;
|
||
vec->e.vector.list = e;
|
||
break;
|
||
default:
|
||
return error (e, "invalid number of elements in vector exprssion");
|
||
}
|
||
return vec;
|
||
}
|
||
|
||
expr_t *
|
||
new_entity_expr (int entity_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_entity_val (entity_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_field_expr (int field_val, type_t *type, def_t *def)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_field_val (field_val, type, def);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_func_expr (int func_val, type_t *type)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_func_val (func_val, type);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_pointer_expr (int val, type_t *type, def_t *def)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_pointer_val (val, type, def);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_quaternion_expr (const float *quaternion_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_quaternion_val (quaternion_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_integer_expr (int integer_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_integer_val (integer_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_uinteger_expr (unsigned uinteger_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_uinteger_val (uinteger_val);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
new_short_expr (short short_val)
|
||
{
|
||
expr_t *e = new_expr ();
|
||
e->type = ex_value;
|
||
e->e.value = new_short_val (short_val);
|
||
return e;
|
||
}
|
||
|
||
int
|
||
is_constant (expr_t *e)
|
||
{
|
||
while ((e->type == ex_uexpr || e->type == ex_expr)
|
||
&& e->e.expr.op == 'A') {
|
||
e = e->e.expr.e1;
|
||
}
|
||
if (e->type == ex_nil || e->type == ex_value || e->type == ex_labelref
|
||
|| (e->type == ex_symbol && e->e.symbol->sy_type == sy_const)
|
||
|| (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant))
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
expr_t *
|
||
constant_expr (expr_t *e)
|
||
{
|
||
expr_t *new;
|
||
symbol_t *sym;
|
||
ex_value_t *value;
|
||
|
||
if (!is_constant (e))
|
||
return e;
|
||
if (e->type == ex_nil || e->type == ex_value || e->type == ex_labelref)
|
||
return e;
|
||
if (e->type != ex_symbol)
|
||
return e;
|
||
sym = e->e.symbol;
|
||
if (sym->sy_type == sy_const) {
|
||
value = sym->s.value;
|
||
} else if (sym->sy_type == sy_var && sym->s.def->constant) {
|
||
//FIXME pointers and fields
|
||
internal_error (e, "what to do here?");
|
||
//memset (&value, 0, sizeof (value));
|
||
//memcpy (&value.v, &D_INT (sym->s.def),
|
||
//type_size (sym->s.def->type) * sizeof (pr_type_t));
|
||
} else {
|
||
return e;
|
||
}
|
||
new = new_expr ();
|
||
new->type = ex_value;
|
||
new->line = e->line;
|
||
new->file = e->file;
|
||
new->e.value = value;
|
||
return new;
|
||
}
|
||
|
||
int
|
||
is_string_val (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 1;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_string)
|
||
return 1;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_string)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
const char *
|
||
expr_string (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 0;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_string)
|
||
return e->e.value->v.string_val;
|
||
internal_error (e, "not a string constant");
|
||
}
|
||
|
||
int
|
||
is_float_val (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 1;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_float)
|
||
return 1;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_float)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
double
|
||
expr_double (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 0;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_double)
|
||
return e->e.value->v.double_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_double)
|
||
return e->e.symbol->s.value->v.double_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant
|
||
&& is_double (e->e.symbol->s.def->type))
|
||
return D_DOUBLE (e->e.symbol->s.def);
|
||
internal_error (e, "not a double constant");
|
||
}
|
||
|
||
float
|
||
expr_float (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 0;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_float)
|
||
return e->e.value->v.float_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_float)
|
||
return e->e.symbol->s.value->v.float_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant
|
||
&& is_float (e->e.symbol->s.def->type))
|
||
return D_FLOAT (e->e.symbol->s.def);
|
||
internal_error (e, "not a float constant");
|
||
}
|
||
|
||
int
|
||
is_vector_val (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 1;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_vector)
|
||
return 1;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_vector)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
const float *
|
||
expr_vector (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return vec3_origin;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_vector)
|
||
return e->e.value->v.vector_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_vector)
|
||
return e->e.symbol->s.value->v.vector_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant
|
||
&& e->e.symbol->s.def->type->type == ev_vector)
|
||
return D_VECTOR (e->e.symbol->s.def);
|
||
internal_error (e, "not a vector constant");
|
||
}
|
||
|
||
int
|
||
is_quaternion_val (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 1;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_quat)
|
||
return 1;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_quat)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
const float *
|
||
expr_quaternion (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return quat_origin;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_quat)
|
||
return e->e.value->v.quaternion_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_quat)
|
||
return e->e.symbol->s.value->v.quaternion_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant
|
||
&& e->e.symbol->s.def->type->type == ev_quat)
|
||
return D_QUAT (e->e.symbol->s.def);
|
||
internal_error (e, "not a quaternion constant");
|
||
}
|
||
|
||
int
|
||
is_integer_val (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 1;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_integer)
|
||
return 1;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& (e->e.symbol->type->type == ev_integer
|
||
|| is_enum (e->e.symbol->type)))
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
expr_integer (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 0;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_integer)
|
||
return e->e.value->v.integer_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& (e->e.symbol->type->type == ev_integer
|
||
|| is_enum (e->e.symbol->type)))
|
||
return e->e.symbol->s.value->v.integer_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant
|
||
&& is_integral (e->e.symbol->s.def->type))
|
||
return D_INT (e->e.symbol->s.def);
|
||
internal_error (e, "not an integer constant");
|
||
}
|
||
|
||
unsigned
|
||
expr_uinteger (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 0;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_uinteger)
|
||
return e->e.value->v.uinteger_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_uinteger)
|
||
return e->e.symbol->s.value->v.uinteger_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_var
|
||
&& e->e.symbol->s.def->constant
|
||
&& is_integral (e->e.symbol->s.def->type))
|
||
return D_INT (e->e.symbol->s.def);
|
||
internal_error (e, "not an unsigned constant");
|
||
}
|
||
|
||
int
|
||
is_short_val (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 1;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_short)
|
||
return 1;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_short)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
short
|
||
expr_short (expr_t *e)
|
||
{
|
||
if (e->type == ex_nil)
|
||
return 0;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_short)
|
||
return e->e.value->v.short_val;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const
|
||
&& e->e.symbol->type->type == ev_short)
|
||
return e->e.symbol->s.value->v.short_val;
|
||
internal_error (e, "not a short constant");
|
||
}
|
||
|
||
expr_t *
|
||
new_self_expr (void)
|
||
{
|
||
symbol_t *sym;
|
||
|
||
sym = make_symbol (".self", &type_entity, pr.near_data, sc_extern);
|
||
if (!sym->table)
|
||
symtab_addsymbol (pr.symtab, sym);
|
||
return new_symbol_expr (sym);
|
||
}
|
||
|
||
expr_t *
|
||
new_this_expr (void)
|
||
{
|
||
symbol_t *sym;
|
||
|
||
sym = make_symbol (".this", field_type (&type_id), pr.near_data, sc_extern);
|
||
if (!sym->table)
|
||
symtab_addsymbol (pr.symtab, sym);
|
||
return new_symbol_expr (sym);
|
||
}
|
||
|
||
expr_t *
|
||
new_alias_expr (type_t *type, expr_t *expr)
|
||
{
|
||
expr_t *alias;
|
||
|
||
alias = new_unary_expr ('A', expr);
|
||
alias->e.expr.type = type;
|
||
//if (expr->type == ex_uexpr && expr->e.expr.op == 'A')
|
||
// bug (alias, "aliasing an alias expression");
|
||
if (expr->type == ex_expr && expr->e.expr.op == 'A') {
|
||
return new_offset_alias_expr (type, expr, 0);
|
||
}
|
||
alias->file = expr->file;
|
||
alias->line = expr->line;
|
||
return alias;
|
||
}
|
||
|
||
expr_t *
|
||
new_offset_alias_expr (type_t *type, expr_t *expr, int offset)
|
||
{
|
||
expr_t *alias;
|
||
|
||
if (expr->type == ex_expr && expr->e.expr.op == 'A') {
|
||
expr_t *ofs_expr = expr->e.expr.e2;
|
||
expr = expr->e.expr.e1;
|
||
if (!is_constant (ofs_expr)) {
|
||
internal_error (ofs_expr, "non-constant offset for alias expr");
|
||
}
|
||
offset += expr_integer (ofs_expr);
|
||
}
|
||
alias = new_binary_expr ('A', expr, new_integer_expr (offset));
|
||
alias->e.expr.type = type;
|
||
alias->file = expr->file;
|
||
alias->line = expr->line;
|
||
return alias;
|
||
}
|
||
|
||
static expr_t *
|
||
param_expr (const char *name, type_t *type)
|
||
{
|
||
symbol_t *sym;
|
||
expr_t *sym_expr;
|
||
|
||
sym = make_symbol (name, &type_param, pr.symtab->space, sc_extern);
|
||
if (!sym->table)
|
||
symtab_addsymbol (pr.symtab, sym);
|
||
sym_expr = new_symbol_expr (sym);
|
||
return new_alias_expr (type, sym_expr);
|
||
}
|
||
|
||
expr_t *
|
||
new_ret_expr (type_t *type)
|
||
{
|
||
return param_expr (".return", type);
|
||
}
|
||
|
||
expr_t *
|
||
new_param_expr (type_t *type, int num)
|
||
{
|
||
return param_expr (va (".param_%d", num), type);
|
||
}
|
||
|
||
expr_t *
|
||
new_move_expr (expr_t *e1, expr_t *e2, type_t *type, int indirect)
|
||
{
|
||
expr_t *e = new_binary_expr (indirect ? 'M' : 'm', e1, e2);
|
||
e->e.expr.type = type;
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
append_expr (expr_t *block, expr_t *e)
|
||
{
|
||
if (block->type != ex_block)
|
||
internal_error (block, "not a block expression");
|
||
|
||
if (!e || e->type == ex_error)
|
||
return block;
|
||
|
||
if (e->next)
|
||
internal_error (e, "append_expr: expr loop detected");
|
||
|
||
*block->e.block.tail = e;
|
||
block->e.block.tail = &e->next;
|
||
|
||
return block;
|
||
}
|
||
|
||
static symbol_t *
|
||
get_struct_field (const type_t *t1, expr_t *e1, expr_t *e2)
|
||
{
|
||
symtab_t *strct = t1->t.symtab;
|
||
symbol_t *sym = e2->e.symbol;//FIXME need to check
|
||
symbol_t *field;
|
||
|
||
if (!strct) {
|
||
error (e1, "dereferencing pointer to incomplete type");
|
||
return 0;
|
||
}
|
||
field = symtab_lookup (strct, sym->name);
|
||
if (!field && t1 != &type_entity) {
|
||
error (e2, "'%s' has no member named '%s'", t1->name + 4, sym->name);
|
||
e1->type = ex_error;
|
||
}
|
||
return field;
|
||
}
|
||
|
||
expr_t *
|
||
field_expr (expr_t *e1, expr_t *e2)
|
||
{
|
||
const type_t *t1, *t2;
|
||
expr_t *e;
|
||
|
||
t1 = get_type (e1);
|
||
if (e1->type == ex_error)
|
||
return e1;
|
||
if (t1->type == ev_entity) {
|
||
symbol_t *field = 0;
|
||
|
||
if (e2->type == ex_symbol)
|
||
field = get_struct_field (&type_entity, e1, e2);
|
||
if (field) {
|
||
e2 = new_field_expr (0, field->type, field->s.def);
|
||
e = new_binary_expr ('.', e1, e2);
|
||
e->e.expr.type = field->type;
|
||
return e;
|
||
} else {
|
||
t2 = get_type (e2);
|
||
if (e2->type == ex_error)
|
||
return e2;
|
||
if (t2->type == ev_field) {
|
||
e = new_binary_expr ('.', e1, e2);
|
||
e->e.expr.type = t2->t.fldptr.type;
|
||
return e;
|
||
}
|
||
}
|
||
} else if (t1->type == ev_pointer) {
|
||
if (is_struct (t1->t.fldptr.type)) {
|
||
symbol_t *field;
|
||
|
||
field = get_struct_field (t1->t.fldptr.type, e1, e2);
|
||
if (!field)
|
||
return e1;
|
||
|
||
e2->type = ex_value;
|
||
e2->e.value = new_short_val (field->s.offset);
|
||
e = new_binary_expr ('&', e1, e2);
|
||
e->e.expr.type = pointer_type (field->type);
|
||
return unary_expr ('.', e);
|
||
} else if (obj_is_class (t1->t.fldptr.type)) {
|
||
class_t *class = t1->t.fldptr.type->t.class;
|
||
symbol_t *sym = e2->e.symbol;//FIXME need to check
|
||
symbol_t *ivar;
|
||
int protected = class_access (current_class, class);
|
||
|
||
ivar = class_find_ivar (class, protected, sym->name);
|
||
if (!ivar)
|
||
return new_error_expr ();
|
||
e2->type = ex_value;
|
||
e2->e.value = new_short_val (ivar->s.offset);
|
||
e = new_binary_expr ('&', e1, e2);
|
||
e->e.expr.type = pointer_type (ivar->type);
|
||
return unary_expr ('.', e);
|
||
}
|
||
} else if (t1->type == ev_vector || t1->type == ev_quat
|
||
|| is_struct (t1)) {
|
||
symbol_t *field;
|
||
|
||
field = get_struct_field (t1, e1, e2);
|
||
if (!field)
|
||
return e1;
|
||
|
||
if (e1->type == ex_expr && e1->e.expr.op == '.'
|
||
&& get_type (e1->e.expr.e1) == &type_entity) {
|
||
// undo the . expression
|
||
e2 = e1->e.expr.e2;
|
||
e1 = e1->e.expr.e1;
|
||
// offset the field expresion
|
||
if (e2->type == ex_symbol) {
|
||
symbol_t *sym;
|
||
def_t *def;
|
||
sym = symtab_lookup (pr.entity_fields, e2->e.symbol->name);
|
||
if (!sym) {
|
||
internal_error (e2, "failed to find entity field %s",
|
||
e2->e.symbol->name);
|
||
}
|
||
def = sym->s.def;
|
||
e2 = new_field_expr (0, field->type, def);
|
||
} else if (e2->type != ex_value
|
||
|| e2->e.value->lltype != ev_field) {
|
||
internal_error (e2, "unexpected field exression");
|
||
}
|
||
e2->e.value = new_field_val (e2->e.value->v.pointer.val + field->s.offset, field->type, e2->e.value->v.pointer.def);
|
||
// create a new . expression
|
||
return field_expr (e1, e2);
|
||
} else {
|
||
if (e1->type == ex_uexpr && e1->e.expr.op == '.') {
|
||
e2->type = ex_value;
|
||
e2->e.value = new_short_val (field->s.offset);
|
||
e = address_expr (e1, e2, field->type);
|
||
return unary_expr ('.', e);
|
||
} else {
|
||
return new_offset_alias_expr (field->type, e1, field->s.offset);
|
||
}
|
||
}
|
||
} else if (obj_is_class (t1)) {
|
||
//Class instance variables aren't allowed and thus declaring one
|
||
//is treated as an error, so this is a follow-on error.
|
||
return error (e1, "class instance access");
|
||
}
|
||
return type_mismatch (e1, e2, '.');
|
||
}
|
||
|
||
expr_t *
|
||
convert_from_bool (expr_t *e, type_t *type)
|
||
{
|
||
expr_t *zero;
|
||
expr_t *one;
|
||
expr_t *cond;
|
||
|
||
if (is_float (type)) {
|
||
one = new_float_expr (1);
|
||
zero = new_float_expr (0);
|
||
} else if (is_integer (type)) {
|
||
one = new_integer_expr (1);
|
||
zero = new_integer_expr (0);
|
||
} else if (is_enum (type) && enum_as_bool (type, &zero, &one)) {
|
||
// don't need to do anything
|
||
} else if (is_uinteger (type)) {
|
||
one = new_uinteger_expr (1);
|
||
zero = new_uinteger_expr (0);
|
||
} else {
|
||
return error (e, "can't convert from bool value");
|
||
}
|
||
cond = new_expr ();
|
||
*cond = *e;
|
||
cond->next = 0;
|
||
|
||
cond = conditional_expr (cond, one, zero);
|
||
e->type = cond->type;
|
||
e->e = cond->e;
|
||
return e;
|
||
}
|
||
|
||
void
|
||
convert_int (expr_t *e)
|
||
{
|
||
float float_val = expr_integer (e);
|
||
e->type = ex_value;
|
||
e->e.value = new_float_val (float_val);
|
||
}
|
||
|
||
void
|
||
convert_short (expr_t *e)
|
||
{
|
||
float float_val = expr_short (e);
|
||
e->type = ex_value;
|
||
e->e.value = new_float_val (float_val);
|
||
}
|
||
|
||
void
|
||
convert_short_int (expr_t *e)
|
||
{
|
||
float integer_val = expr_short (e);
|
||
e->type = ex_value;
|
||
e->e.value = new_integer_val (integer_val);
|
||
}
|
||
|
||
void
|
||
convert_double (expr_t *e)
|
||
{
|
||
float float_val = expr_double (e);
|
||
e->type = ex_value;
|
||
e->e.value = new_float_val (float_val);
|
||
}
|
||
|
||
expr_t *
|
||
convert_nil (expr_t *e, type_t *t)
|
||
{
|
||
e->type = ex_value;
|
||
e->e.value = new_nil_val (t);
|
||
return e;
|
||
}
|
||
|
||
int
|
||
is_compare (int op)
|
||
{
|
||
if (op == EQ || op == NE || op == LE || op == GE || op == LT || op == GT
|
||
|| op == '>' || op == '<')
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
is_math_op (int op)
|
||
{
|
||
if (op == '*' || op == '/' || op == '+' || op == '-')
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
is_logic (int op)
|
||
{
|
||
if (op == OR || op == AND)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
has_function_call (expr_t *e)
|
||
{
|
||
switch (e->type) {
|
||
case ex_bool:
|
||
return has_function_call (e->e.bool.e);
|
||
case ex_block:
|
||
if (e->e.block.is_call)
|
||
return 1;
|
||
for (e = e->e.block.head; e; e = e->next)
|
||
if (has_function_call (e))
|
||
return 1;
|
||
return 0;
|
||
case ex_expr:
|
||
if (e->e.expr.op == 'c')
|
||
return 1;
|
||
return (has_function_call (e->e.expr.e1)
|
||
|| has_function_call (e->e.expr.e2));
|
||
case ex_uexpr:
|
||
if (e->e.expr.op != 'g')
|
||
return has_function_call (e->e.expr.e1);
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
expr_t *
|
||
asx_expr (int op, expr_t *e1, expr_t *e2)
|
||
{
|
||
if (e1->type == ex_error)
|
||
return e1;
|
||
else if (e2->type == ex_error)
|
||
return e2;
|
||
else {
|
||
expr_t *e = new_expr ();
|
||
|
||
*e = *e1;
|
||
e2->paren = 1;
|
||
return assign_expr (e, binary_expr (op, e1, e2));
|
||
}
|
||
}
|
||
|
||
expr_t *
|
||
unary_expr (int op, expr_t *e)
|
||
{
|
||
vec3_t v;
|
||
quat_t q;
|
||
const char *s;
|
||
expr_t *new;
|
||
type_t *t;
|
||
|
||
convert_name (e);
|
||
if (e->type == ex_error)
|
||
return e;
|
||
switch (op) {
|
||
case '-':
|
||
if (!is_math (get_type (e)))
|
||
return error (e, "invalid type for unary -");
|
||
if (is_constant (e)) {
|
||
switch (extract_type (e)) {
|
||
case ev_string:
|
||
case ev_entity:
|
||
case ev_field:
|
||
case ev_func:
|
||
case ev_pointer:
|
||
internal_error (e, "type check failed!");
|
||
case ev_double:
|
||
new = new_double_expr (-expr_double (e));
|
||
new->implicit = e->implicit;
|
||
return new;
|
||
case ev_float:
|
||
return new_float_expr (-expr_float (e));
|
||
case ev_vector:
|
||
VectorNegate (expr_vector (e), v);
|
||
return new_vector_expr (v);
|
||
case ev_quat:
|
||
QuatNegate (expr_vector (e), q);
|
||
return new_vector_expr (q);
|
||
case ev_integer:
|
||
return new_integer_expr (-expr_integer (e));
|
||
case ev_uinteger:
|
||
return new_uinteger_expr (-expr_uinteger (e));
|
||
case ev_short:
|
||
return new_short_expr (-expr_short (e));
|
||
case ev_invalid:
|
||
case ev_type_count:
|
||
case ev_void:
|
||
break;
|
||
}
|
||
internal_error (e, "weird expression type");
|
||
}
|
||
switch (e->type) {
|
||
case ex_value: // should be handled above
|
||
case ex_error:
|
||
case ex_label:
|
||
case ex_labelref:
|
||
case ex_state:
|
||
internal_error (e, 0);
|
||
case ex_uexpr:
|
||
if (e->e.expr.op == '-')
|
||
return e->e.expr.e1;
|
||
case ex_block:
|
||
if (!e->e.block.result)
|
||
return error (e, "invalid type for unary -");
|
||
case ex_expr:
|
||
case ex_bool:
|
||
case ex_temp:
|
||
case ex_vector:
|
||
{
|
||
expr_t *n = new_unary_expr (op, e);
|
||
|
||
n->e.expr.type = e->e.expr.type;
|
||
return n;
|
||
}
|
||
case ex_symbol:
|
||
{
|
||
expr_t *n = new_unary_expr (op, e);
|
||
|
||
n->e.expr.type = e->e.symbol->type;
|
||
return n;
|
||
}
|
||
case ex_nil:
|
||
return error (e, "invalid type for unary -");
|
||
}
|
||
break;
|
||
case '!':
|
||
if (is_constant (e)) {
|
||
switch (extract_type (e)) {
|
||
case ev_entity:
|
||
case ev_field:
|
||
case ev_func:
|
||
case ev_pointer:
|
||
internal_error (e, 0);
|
||
case ev_string:
|
||
s = expr_string (e);
|
||
return new_integer_expr (!s || !s[0]);
|
||
case ev_double:
|
||
return new_integer_expr (!expr_double (e));
|
||
case ev_float:
|
||
return new_integer_expr (!expr_float (e));
|
||
case ev_vector:
|
||
return new_integer_expr (!VectorIsZero (expr_vector (e)));
|
||
case ev_quat:
|
||
return new_integer_expr (!QuatIsZero (expr_quaternion (e)));
|
||
case ev_integer:
|
||
return new_integer_expr (!expr_integer (e));
|
||
case ev_uinteger:
|
||
return new_uinteger_expr (!expr_uinteger (e));
|
||
case ev_short:
|
||
return new_short_expr (!expr_short (e));
|
||
case ev_invalid:
|
||
case ev_type_count:
|
||
case ev_void:
|
||
break;
|
||
}
|
||
internal_error (e, "weird expression type");
|
||
}
|
||
switch (e->type) {
|
||
case ex_value: // should be handled above
|
||
case ex_error:
|
||
case ex_label:
|
||
case ex_labelref:
|
||
case ex_state:
|
||
internal_error (e, 0);
|
||
case ex_bool:
|
||
return new_bool_expr (e->e.bool.false_list,
|
||
e->e.bool.true_list, e);
|
||
case ex_block:
|
||
if (!e->e.block.result)
|
||
return error (e, "invalid type for unary !");
|
||
case ex_uexpr:
|
||
case ex_expr:
|
||
case ex_symbol:
|
||
case ex_temp:
|
||
case ex_vector:
|
||
{
|
||
expr_t *n = new_unary_expr (op, e);
|
||
|
||
if (options.code.progsversion > PROG_ID_VERSION)
|
||
n->e.expr.type = &type_integer;
|
||
else
|
||
n->e.expr.type = &type_float;
|
||
return n;
|
||
}
|
||
case ex_nil:
|
||
return error (e, "invalid type for unary !");
|
||
}
|
||
break;
|
||
case '~':
|
||
if (is_constant (e)) {
|
||
switch (extract_type (e)) {
|
||
case ev_string:
|
||
case ev_entity:
|
||
case ev_field:
|
||
case ev_func:
|
||
case ev_pointer:
|
||
case ev_vector:
|
||
case ev_double:
|
||
return error (e, "invalid type for unary ~");
|
||
case ev_float:
|
||
return new_float_expr (~(int) expr_float (e));
|
||
case ev_quat:
|
||
QuatConj (expr_vector (e), q);
|
||
return new_vector_expr (q);
|
||
case ev_integer:
|
||
return new_integer_expr (~expr_integer (e));
|
||
case ev_uinteger:
|
||
return new_uinteger_expr (~expr_uinteger (e));
|
||
case ev_short:
|
||
return new_short_expr (~expr_short (e));
|
||
case ev_invalid:
|
||
t = get_type (e);
|
||
if (t->meta == ty_enum) {
|
||
return new_integer_expr (~expr_integer (e));
|
||
}
|
||
break;
|
||
case ev_type_count:
|
||
case ev_void:
|
||
break;
|
||
}
|
||
internal_error (e, "weird expression type");
|
||
}
|
||
switch (e->type) {
|
||
case ex_value: // should be handled above
|
||
case ex_error:
|
||
case ex_label:
|
||
case ex_labelref:
|
||
case ex_state:
|
||
internal_error (e, 0);
|
||
case ex_uexpr:
|
||
if (e->e.expr.op == '~')
|
||
return e->e.expr.e1;
|
||
goto bitnot_expr;
|
||
case ex_block:
|
||
if (!e->e.block.result)
|
||
return error (e, "invalid type for unary ~");
|
||
goto bitnot_expr;
|
||
case ex_expr:
|
||
case ex_bool:
|
||
case ex_symbol:
|
||
case ex_temp:
|
||
case ex_vector:
|
||
bitnot_expr:
|
||
if (options.code.progsversion == PROG_ID_VERSION) {
|
||
expr_t *n1 = new_integer_expr (-1);
|
||
return binary_expr ('-', n1, e);
|
||
} else {
|
||
expr_t *n = new_unary_expr (op, e);
|
||
type_t *t = get_type (e);
|
||
|
||
if (t != &type_integer && t != &type_float
|
||
&& t != &type_quaternion)
|
||
return error (e, "invalid type for unary ~");
|
||
n->e.expr.type = t;
|
||
return n;
|
||
}
|
||
case ex_nil:
|
||
return error (e, "invalid type for unary ~");
|
||
}
|
||
break;
|
||
case '.':
|
||
if (extract_type (e) != ev_pointer)
|
||
return error (e, "invalid type for unary .");
|
||
e = new_unary_expr ('.', e);
|
||
e->e.expr.type = get_type (e->e.expr.e1)->t.fldptr.type;
|
||
return e;
|
||
case '+':
|
||
if (!is_math (get_type (e)))
|
||
return error (e, "invalid type for unary +");
|
||
return e;
|
||
}
|
||
internal_error (e, 0);
|
||
}
|
||
|
||
expr_t *
|
||
build_function_call (expr_t *fexpr, const type_t *ftype, expr_t *params)
|
||
{
|
||
expr_t *e;
|
||
int arg_count = 0, parm_count = 0;
|
||
int i;
|
||
expr_t *args = 0, **a = &args;
|
||
type_t *arg_types[MAX_PARMS];
|
||
expr_t *arg_exprs[MAX_PARMS][2];
|
||
int arg_expr_count = 0;
|
||
expr_t *call;
|
||
expr_t *err = 0;
|
||
|
||
|
||
for (e = params; e; e = e->next) {
|
||
if (e->type == ex_error)
|
||
return e;
|
||
arg_count++;
|
||
}
|
||
|
||
if (arg_count > MAX_PARMS) {
|
||
return error (fexpr, "more than %d parameters", MAX_PARMS);
|
||
}
|
||
if (ftype->t.func.num_params < -1) {
|
||
if (-arg_count > ftype->t.func.num_params + 1) {
|
||
if (!options.traditional)
|
||
return error (fexpr, "too few arguments");
|
||
if (options.warnings.traditional)
|
||
warning (fexpr, "too few arguments");
|
||
}
|
||
parm_count = -ftype->t.func.num_params - 1;
|
||
} else if (ftype->t.func.num_params >= 0) {
|
||
if (arg_count > ftype->t.func.num_params) {
|
||
return error (fexpr, "too many arguments");
|
||
} else if (arg_count < ftype->t.func.num_params) {
|
||
if (!options.traditional)
|
||
return error (fexpr, "too few arguments");
|
||
if (options.warnings.traditional)
|
||
warning (fexpr, "too few arguments");
|
||
}
|
||
parm_count = ftype->t.func.num_params;
|
||
}
|
||
for (i = arg_count - 1, e = params; i >= 0; i--, e = e->next) {
|
||
type_t *t = get_type (e);
|
||
|
||
if (!t) {
|
||
return e;
|
||
}
|
||
|
||
if (!type_size (t))
|
||
err = error (e, "type of formal parameter %d is incomplete",
|
||
i + 1);
|
||
if (type_size (t) > type_size (&type_param))
|
||
err = error (e, "formal parameter %d is too large to be passed by"
|
||
" value", i + 1);
|
||
if (i < parm_count) {
|
||
if (e->type == ex_nil)
|
||
convert_nil (e, t = ftype->t.func.param_types[i]);
|
||
if (e->type == ex_bool)
|
||
convert_from_bool (e, ftype->t.func.param_types[i]);
|
||
if (e->type == ex_error)
|
||
return e;
|
||
if (!type_assignable (ftype->t.func.param_types[i], t)) {
|
||
err = param_mismatch (e, i + 1, fexpr->e.symbol->name,
|
||
ftype->t.func.param_types[i], t);
|
||
}
|
||
t = ftype->t.func.param_types[i];
|
||
} else {
|
||
if (e->type == ex_nil)
|
||
convert_nil (e, t = type_nil);
|
||
if (e->type == ex_bool)
|
||
convert_from_bool (e, get_type (e));
|
||
if (is_integer_val (e)
|
||
&& options.code.progsversion == PROG_ID_VERSION)
|
||
convert_int (e);
|
||
if (is_float (get_type (e))
|
||
&& options.code.progsversion != PROG_ID_VERSION) {
|
||
t = &type_double;
|
||
}
|
||
if (is_integer_val (e) && options.warnings.vararg_integer)
|
||
warning (e, "passing integer constant into ... function");
|
||
}
|
||
arg_types[arg_count - 1 - i] = t;
|
||
}
|
||
if (err)
|
||
return err;
|
||
|
||
call = new_block_expr ();
|
||
call->e.block.is_call = 1;
|
||
for (e = params, i = 0; e; e = e->next, i++) {
|
||
if (has_function_call (e)) {
|
||
*a = new_temp_def_expr (arg_types[i]);
|
||
arg_exprs[arg_expr_count][0] = cast_expr (arg_types[i],
|
||
convert_vector (e));
|
||
arg_exprs[arg_expr_count][1] = *a;
|
||
arg_expr_count++;
|
||
} else {
|
||
*a = cast_expr (arg_types[i], convert_vector (e));
|
||
}
|
||
a = &(*a)->next;
|
||
}
|
||
for (i = 0; i < arg_expr_count - 1; i++) {
|
||
append_expr (call, assign_expr (arg_exprs[i][1], arg_exprs[i][0]));
|
||
}
|
||
if (arg_expr_count) {
|
||
e = assign_expr (arg_exprs[arg_expr_count - 1][1],
|
||
arg_exprs[arg_expr_count - 1][0]);
|
||
append_expr (call, e);
|
||
}
|
||
e = new_binary_expr ('c', fexpr, args);
|
||
e->e.expr.type = ftype->t.func.type;
|
||
append_expr (call, e);
|
||
if (ftype->t.func.type != &type_void) {
|
||
call->e.block.result = new_ret_expr (ftype->t.func.type);
|
||
} else if (options.traditional) {
|
||
call->e.block.result = new_ret_expr (&type_float);
|
||
}
|
||
return call;
|
||
}
|
||
|
||
expr_t *
|
||
function_expr (expr_t *fexpr, expr_t *params)
|
||
{
|
||
type_t *ftype;
|
||
|
||
find_function (fexpr, params);
|
||
ftype = get_type (fexpr);
|
||
|
||
if (fexpr->type == ex_error)
|
||
return fexpr;
|
||
if (ftype->type != ev_func) {
|
||
if (fexpr->type == ex_symbol)
|
||
return error (fexpr, "Called object \"%s\" is not a function",
|
||
fexpr->e.symbol->name);
|
||
else
|
||
return error (fexpr, "Called object is not a function");
|
||
}
|
||
|
||
if (fexpr->type == ex_symbol && params && is_string_val (params)) {
|
||
// FIXME eww, I hate this, but it's needed :(
|
||
// FIXME make a qc hook? :)
|
||
if (strncmp (fexpr->e.symbol->name, "precache_sound", 14) == 0)
|
||
PrecacheSound (expr_string (params), fexpr->e.symbol->name[14]);
|
||
else if (strncmp (fexpr->e.symbol->name, "precache_model", 14) == 0)
|
||
PrecacheModel (expr_string (params), fexpr->e.symbol->name[14]);
|
||
else if (strncmp (fexpr->e.symbol->name, "precache_file", 13) == 0)
|
||
PrecacheFile (expr_string (params), fexpr->e.symbol->name[13]);
|
||
}
|
||
|
||
return build_function_call (fexpr, ftype, params);
|
||
}
|
||
|
||
expr_t *
|
||
branch_expr (int op, expr_t *test, expr_t *label)
|
||
{
|
||
if (label && label->type != ex_label)
|
||
internal_error (label, "not a label");
|
||
if (label)
|
||
label->e.label.used++;
|
||
return new_binary_expr (op, test, label);
|
||
}
|
||
|
||
expr_t *
|
||
goto_expr (expr_t *label)
|
||
{
|
||
if (label && label->type != ex_label)
|
||
internal_error (label, "not a label");
|
||
if (label)
|
||
label->e.label.used++;
|
||
return new_unary_expr ('g', label);
|
||
}
|
||
|
||
expr_t *
|
||
return_expr (function_t *f, expr_t *e)
|
||
{
|
||
type_t *t;
|
||
|
||
if (!e) {
|
||
if (f->sym->type->t.func.type != &type_void) {
|
||
if (options.traditional) {
|
||
if (options.warnings.traditional)
|
||
warning (e,
|
||
"return from non-void function without a value");
|
||
// force a nil return value in case qf code is being generated
|
||
e = new_nil_expr ();
|
||
} else {
|
||
e = error (e, "return from non-void function without a value");
|
||
return e;
|
||
}
|
||
}
|
||
// the traditional check above may have set e
|
||
if (!e) {
|
||
return new_unary_expr ('r', 0);
|
||
}
|
||
}
|
||
|
||
t = get_type (e);
|
||
|
||
if (e->type == ex_error)
|
||
return e;
|
||
if (f->sym->type->t.func.type == &type_void) {
|
||
if (!options.traditional)
|
||
return error (e, "returning a value for a void function");
|
||
if (options.warnings.traditional)
|
||
warning (e, "returning a value for a void function");
|
||
}
|
||
if (e->type == ex_bool)
|
||
e = convert_from_bool (e, f->sym->type->t.func.type);
|
||
if (f->sym->type->t.func.type == &type_float && is_integer_val (e)) {
|
||
convert_int (e);
|
||
t = &type_float;
|
||
}
|
||
if (t == &type_void) {
|
||
if (e->type == ex_nil) {
|
||
t = f->sym->type->t.func.type;
|
||
convert_nil (e, t);
|
||
if (e->type == ex_nil)
|
||
return error (e, "invalid return type for NIL");
|
||
} else {
|
||
if (!options.traditional)
|
||
return error (e, "void value not ignored as it ought to be");
|
||
if (options.warnings.traditional)
|
||
warning (e, "void value not ignored as it ought to be");
|
||
//FIXME does anything need to be done here?
|
||
}
|
||
}
|
||
if (!type_assignable (f->sym->type->t.func.type, t)) {
|
||
if (!options.traditional)
|
||
return error (e, "type mismatch for return value of %s",
|
||
f->sym->name);
|
||
if (options.warnings.traditional)
|
||
warning (e, "type mismatch for return value of %s",
|
||
f->sym->name);
|
||
} else {
|
||
if (f->sym->type->t.func.type != t) {
|
||
e = cast_expr (f->sym->type->t.func.type, e);
|
||
t = f->sym->type->t.func.type;
|
||
}
|
||
}
|
||
if (e->type == ex_vector) {
|
||
e = assign_expr (new_temp_def_expr (t), e);
|
||
}
|
||
if (e->type == ex_block) {
|
||
e->e.block.result->rvalue = 1;
|
||
}
|
||
return new_unary_expr ('r', e);
|
||
}
|
||
|
||
expr_t *
|
||
conditional_expr (expr_t *cond, expr_t *e1, expr_t *e2)
|
||
{
|
||
expr_t *block = new_block_expr ();
|
||
type_t *type1 = get_type (e1);
|
||
type_t *type2 = get_type (e2);
|
||
expr_t *tlabel = new_label_expr ();
|
||
expr_t *flabel = new_label_expr ();
|
||
expr_t *elabel = new_label_expr ();
|
||
|
||
if (cond->type == ex_error)
|
||
return cond;
|
||
if (e1->type == ex_error)
|
||
return e1;
|
||
if (e2->type == ex_error)
|
||
return e2;
|
||
|
||
cond = convert_bool (cond, 1);
|
||
if (cond->type == ex_error)
|
||
return cond;
|
||
|
||
backpatch (cond->e.bool.true_list, tlabel);
|
||
backpatch (cond->e.bool.false_list, flabel);
|
||
|
||
block->e.block.result = (type1 == type2) ? new_temp_def_expr (type1) : 0;
|
||
append_expr (block, cond);
|
||
append_expr (cond->e.bool.e, flabel);
|
||
if (block->e.block.result)
|
||
append_expr (block, assign_expr (block->e.block.result, e2));
|
||
else
|
||
append_expr (block, e2);
|
||
append_expr (block, goto_expr (elabel));
|
||
append_expr (block, tlabel);
|
||
if (block->e.block.result)
|
||
append_expr (block, assign_expr (block->e.block.result, e1));
|
||
else
|
||
append_expr (block, e1);
|
||
append_expr (block, elabel);
|
||
return block;
|
||
}
|
||
|
||
expr_t *
|
||
incop_expr (int op, expr_t *e, int postop)
|
||
{
|
||
expr_t *one;
|
||
|
||
if (e->type == ex_error)
|
||
return e;
|
||
|
||
one = new_integer_expr (1); // integer constants get auto-cast to float
|
||
if (postop) {
|
||
expr_t *t1, *t2;
|
||
type_t *type = get_type (e);
|
||
expr_t *block = new_block_expr ();
|
||
expr_t *res = new_expr ();
|
||
|
||
if (e->type == ex_error) // get_type failed
|
||
return e;
|
||
t1 = new_temp_def_expr (type);
|
||
t2 = new_temp_def_expr (type);
|
||
append_expr (block, assign_expr (t1, e));
|
||
append_expr (block, assign_expr (t2, binary_expr (op, t1, one)));
|
||
res = copy_expr (e);
|
||
if (res->type == ex_uexpr && res->e.expr.op == '.')
|
||
res = pointer_expr (address_expr (res, 0, 0));
|
||
append_expr (block, assign_expr (res, t2));
|
||
block->e.block.result = t1;
|
||
return block;
|
||
} else {
|
||
return asx_expr (op, e, one);
|
||
}
|
||
}
|
||
|
||
expr_t *
|
||
array_expr (expr_t *array, expr_t *index)
|
||
{
|
||
type_t *array_type = get_type (array);
|
||
type_t *index_type = get_type (index);
|
||
expr_t *scale;
|
||
expr_t *offset;
|
||
expr_t *base;
|
||
expr_t *e;
|
||
int ind = 0;
|
||
|
||
if (array->type == ex_error)
|
||
return array;
|
||
if (index->type == ex_error)
|
||
return index;
|
||
|
||
if (array_type->type != ev_pointer && !is_array (array_type))
|
||
return error (array, "not an array");
|
||
if (!is_integral (index_type))
|
||
return error (index, "invalid array index type");
|
||
if (is_short_val (index))
|
||
ind = expr_short (index);
|
||
if (is_integer_val (index))
|
||
ind = expr_integer (index);
|
||
if (array_type->t.func.num_params
|
||
&& is_constant (index)
|
||
&& (ind < array_type->t.array.base
|
||
|| ind - array_type->t.array.base >= array_type->t.array.size))
|
||
return error (index, "array index out of bounds");
|
||
scale = new_integer_expr (type_size (array_type->t.array.type));
|
||
index = binary_expr ('*', index, scale);
|
||
base = new_integer_expr (array_type->t.array.base);
|
||
offset = binary_expr ('*', base, scale);
|
||
index = binary_expr ('-', index, offset);
|
||
if (is_short_val (index))
|
||
ind = expr_short (index);
|
||
if (is_integer_val (index))
|
||
ind = expr_integer (index);
|
||
if ((is_constant (index) && ind < 32768 && ind >= -32768))
|
||
index = new_short_expr (ind);
|
||
if (is_array (array_type)) {
|
||
e = address_expr (array, index, array_type->t.array.type);
|
||
} else {
|
||
if (!is_short_val (index) || expr_short (index)) {
|
||
e = new_binary_expr ('&', array, index);
|
||
//e->e.expr.type = array_type->aux_type;
|
||
e->e.expr.type = array_type;
|
||
} else {
|
||
e = array;
|
||
}
|
||
}
|
||
e = unary_expr ('.', e);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
pointer_expr (expr_t *pointer)
|
||
{
|
||
type_t *pointer_type = get_type (pointer);
|
||
|
||
if (pointer->type == ex_error)
|
||
return pointer;
|
||
if (pointer_type->type != ev_pointer)
|
||
return error (pointer, "not a pointer");
|
||
return array_expr (pointer, new_integer_expr (0));
|
||
}
|
||
|
||
expr_t *
|
||
address_expr (expr_t *e1, expr_t *e2, type_t *t)
|
||
{
|
||
expr_t *e;
|
||
|
||
if (e1->type == ex_error)
|
||
return e1;
|
||
|
||
if (!t)
|
||
t = get_type (e1);
|
||
|
||
switch (e1->type) {
|
||
case ex_symbol:
|
||
if (e1->e.symbol->sy_type == sy_var) {
|
||
def_t *def = e1->e.symbol->s.def;
|
||
type_t *type = def->type;
|
||
|
||
if (is_array (type)) {
|
||
e = e1;
|
||
e->type = ex_value;
|
||
e->e.value = new_pointer_val (0, t, def);
|
||
} else {
|
||
e = new_pointer_expr (0, t, def);
|
||
e->line = e1->line;
|
||
e->file = e1->file;
|
||
}
|
||
break;
|
||
}
|
||
return error (e1, "invalid type for unary &");
|
||
case ex_expr:
|
||
if (e1->e.expr.op == '.') {
|
||
e = e1;
|
||
e->e.expr.op = '&';
|
||
e->e.expr.type = pointer_type (e->e.expr.type);
|
||
break;
|
||
}
|
||
if (e1->e.expr.op == 'm') {
|
||
// direct move, so obtain the address of the source
|
||
e = address_expr (e1->e.expr.e2, 0, t);
|
||
break;
|
||
}
|
||
if (e1->e.expr.op == 'M') {
|
||
// indirect move, so we already have the address of the source
|
||
e = e1->e.expr.e2;
|
||
break;
|
||
}
|
||
if (e1->e.expr.op == 'A') {
|
||
if (!t)
|
||
t = e1->e.expr.type;
|
||
if (e2) {
|
||
e2 = binary_expr ('+', e1->e.expr.e2, e2);
|
||
} else {
|
||
e2 = e1->e.expr.e2;
|
||
}
|
||
return address_expr (e1->e.expr.e1, e2, t);
|
||
}
|
||
return error (e1, "invalid type for unary &");
|
||
case ex_uexpr:
|
||
if (e1->e.expr.op == '.') {
|
||
e = e1->e.expr.e1;
|
||
if (e->type == ex_expr && e->e.expr.op == '.') {
|
||
e->e.expr.type = pointer_type (e->e.expr.type);
|
||
e->e.expr.op = '&';
|
||
}
|
||
break;
|
||
}
|
||
if (e1->e.expr.op == 'A') {
|
||
if (!t)
|
||
t = e1->e.expr.type;
|
||
return address_expr (e1->e.expr.e1, e2, t);
|
||
}
|
||
return error (e1, "invalid type for unary &");
|
||
case ex_block:
|
||
if (!e1->e.block.result)
|
||
return error (e1, "invalid type for unary &");
|
||
e1->e.block.result = address_expr (e1->e.block.result, e2, t);
|
||
return e1;
|
||
case ex_label:
|
||
return new_label_ref (&e1->e.label);
|
||
case ex_temp:
|
||
e = new_unary_expr ('&', e1);
|
||
e->e.expr.type = pointer_type (t);
|
||
break;
|
||
default:
|
||
return error (e1, "invalid type for unary &");
|
||
}
|
||
if (e2) {
|
||
if (e2->type == ex_error)
|
||
return e2;
|
||
if (e->type == ex_value && e->e.value->lltype == ev_pointer
|
||
&& is_short_val (e2)) {
|
||
e->e.value = new_pointer_val (e->e.value->v.pointer.val + expr_short (e2), t, e->e.value->v.pointer.def);
|
||
} else {
|
||
if (!is_short_val (e2) || expr_short (e2)) {
|
||
if (e->type == ex_expr && e->e.expr.op == '&') {
|
||
e = new_binary_expr ('&', e->e.expr.e1,
|
||
binary_expr ('+', e->e.expr.e2, e2));
|
||
} else {
|
||
e = new_binary_expr ('&', e, e2);
|
||
}
|
||
}
|
||
if (e->type == ex_expr || e->type == ex_uexpr)
|
||
e->e.expr.type = pointer_type (t);
|
||
}
|
||
}
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
build_if_statement (int not, expr_t *test, expr_t *s1, expr_t *els, expr_t *s2)
|
||
{
|
||
int line = pr.source_line;
|
||
string_t file = pr.source_file;
|
||
expr_t *if_expr;
|
||
expr_t *tl = new_label_expr ();
|
||
expr_t *fl = new_label_expr ();
|
||
|
||
if (els && !s2) {
|
||
warning (els,
|
||
"suggest braces around empty body in an ‘else’ statement");
|
||
}
|
||
if (!els && !s1) {
|
||
warning (test,
|
||
"suggest braces around empty body in an ‘if’ statement");
|
||
}
|
||
pr.source_line = test->line;
|
||
pr.source_file = test->file;
|
||
|
||
if_expr = new_block_expr ();
|
||
|
||
test = convert_bool (test, 1);
|
||
if (test->type != ex_error) {
|
||
if (not) {
|
||
backpatch (test->e.bool.true_list, fl);
|
||
backpatch (test->e.bool.false_list, tl);
|
||
} else {
|
||
backpatch (test->e.bool.true_list, tl);
|
||
backpatch (test->e.bool.false_list, fl);
|
||
}
|
||
append_expr (test->e.bool.e, tl);
|
||
append_expr (if_expr, test);
|
||
}
|
||
append_expr (if_expr, s1);
|
||
|
||
if (els) {
|
||
pr.source_line = els->line;
|
||
pr.source_file = els->file;
|
||
}
|
||
|
||
if (s2) {
|
||
expr_t *nl = new_label_expr ();
|
||
append_expr (if_expr, goto_expr (nl));
|
||
|
||
append_expr (if_expr, fl);
|
||
append_expr (if_expr, s2);
|
||
append_expr (if_expr, nl);
|
||
} else {
|
||
append_expr (if_expr, fl);
|
||
}
|
||
|
||
pr.source_line = line;
|
||
pr.source_file = file;
|
||
|
||
return if_expr;
|
||
}
|
||
|
||
expr_t *
|
||
build_while_statement (int not, expr_t *test, expr_t *statement,
|
||
expr_t *break_label, expr_t *continue_label)
|
||
{
|
||
int line = pr.source_line;
|
||
string_t file = pr.source_file;
|
||
expr_t *l1 = new_label_expr ();
|
||
expr_t *l2 = break_label;
|
||
expr_t *while_expr;
|
||
|
||
pr.source_line = test->line;
|
||
pr.source_file = test->file;
|
||
|
||
while_expr = new_block_expr ();
|
||
|
||
append_expr (while_expr, goto_expr (continue_label));
|
||
append_expr (while_expr, l1);
|
||
append_expr (while_expr, statement);
|
||
append_expr (while_expr, continue_label);
|
||
|
||
test = convert_bool (test, 1);
|
||
if (test->type != ex_error) {
|
||
if (not) {
|
||
backpatch (test->e.bool.true_list, l2);
|
||
backpatch (test->e.bool.false_list, l1);
|
||
} else {
|
||
backpatch (test->e.bool.true_list, l1);
|
||
backpatch (test->e.bool.false_list, l2);
|
||
}
|
||
append_expr (test->e.bool.e, l2);
|
||
append_expr (while_expr, test);
|
||
}
|
||
|
||
pr.source_line = line;
|
||
pr.source_file = file;
|
||
|
||
return while_expr;
|
||
}
|
||
|
||
expr_t *
|
||
build_do_while_statement (expr_t *statement, int not, expr_t *test,
|
||
expr_t *break_label, expr_t *continue_label)
|
||
{
|
||
expr_t *l1 = new_label_expr ();
|
||
int line = pr.source_line;
|
||
string_t file = pr.source_file;
|
||
expr_t *do_while_expr;
|
||
|
||
if (!statement) {
|
||
warning (break_label,
|
||
"suggest braces around empty body in a ‘do’ statement");
|
||
}
|
||
|
||
pr.source_line = test->line;
|
||
pr.source_file = test->file;
|
||
|
||
do_while_expr = new_block_expr ();
|
||
|
||
append_expr (do_while_expr, l1);
|
||
append_expr (do_while_expr, statement);
|
||
append_expr (do_while_expr, continue_label);
|
||
|
||
test = convert_bool (test, 1);
|
||
if (test->type != ex_error) {
|
||
if (not) {
|
||
backpatch (test->e.bool.true_list, break_label);
|
||
backpatch (test->e.bool.false_list, l1);
|
||
} else {
|
||
backpatch (test->e.bool.true_list, l1);
|
||
backpatch (test->e.bool.false_list, break_label);
|
||
}
|
||
append_expr (test->e.bool.e, break_label);
|
||
append_expr (do_while_expr, test);
|
||
}
|
||
|
||
pr.source_line = line;
|
||
pr.source_file = file;
|
||
|
||
return do_while_expr;
|
||
}
|
||
|
||
expr_t *
|
||
build_for_statement (expr_t *init, expr_t *test, expr_t *next,
|
||
expr_t *statement,
|
||
expr_t *break_label, expr_t *continue_label)
|
||
{
|
||
expr_t *tl = new_label_expr ();
|
||
expr_t *fl = break_label;
|
||
expr_t *l1 = 0;
|
||
expr_t *t;
|
||
int line = pr.source_line;
|
||
string_t file = pr.source_file;
|
||
expr_t *for_expr;
|
||
|
||
if (next)
|
||
t = next;
|
||
else if (test)
|
||
t = test;
|
||
else if (init)
|
||
t = init;
|
||
else
|
||
t = continue_label;
|
||
pr.source_line = t->line;
|
||
pr.source_file = t->file;
|
||
|
||
for_expr = new_block_expr ();
|
||
|
||
append_expr (for_expr, init);
|
||
if (test) {
|
||
l1 = new_label_expr ();
|
||
append_expr (for_expr, goto_expr (l1));
|
||
}
|
||
append_expr (for_expr, tl);
|
||
append_expr (for_expr, statement);
|
||
append_expr (for_expr, continue_label);
|
||
append_expr (for_expr, next);
|
||
if (test) {
|
||
append_expr (for_expr, l1);
|
||
test = convert_bool (test, 1);
|
||
if (test->type != ex_error) {
|
||
backpatch (test->e.bool.true_list, tl);
|
||
backpatch (test->e.bool.false_list, fl);
|
||
append_expr (test->e.bool.e, fl);
|
||
append_expr (for_expr, test);
|
||
}
|
||
} else {
|
||
append_expr (for_expr, goto_expr (tl));
|
||
append_expr (for_expr, fl);
|
||
}
|
||
|
||
pr.source_line = line;
|
||
pr.source_file = file;
|
||
|
||
return for_expr;
|
||
}
|
||
|
||
expr_t *
|
||
build_state_expr (expr_t *e)
|
||
{
|
||
expr_t *frame = 0;
|
||
expr_t *think = 0;
|
||
expr_t *step = 0;
|
||
|
||
e = reverse_expr_list (e);
|
||
frame = e;
|
||
think = frame->next;
|
||
step = think->next;
|
||
if (think->type == ex_symbol)
|
||
think = think_expr (think->e.symbol);
|
||
if (is_integer_val (frame))
|
||
convert_int (frame);
|
||
if (!type_assignable (&type_float, get_type (frame)))
|
||
return error (frame, "invalid type for frame number");
|
||
if (extract_type (think) != ev_func)
|
||
return error (think, "invalid type for think");
|
||
if (step) {
|
||
if (step->next)
|
||
return error (step->next, "too many state arguments");
|
||
if (is_integer_val (step))
|
||
convert_int (step);
|
||
if (!type_assignable (&type_float, get_type (step)))
|
||
return error (step, "invalid type for step");
|
||
}
|
||
return new_state_expr (frame, think, step);
|
||
}
|
||
|
||
expr_t *
|
||
think_expr (symbol_t *think_sym)
|
||
{
|
||
symbol_t *sym;
|
||
|
||
if (think_sym->table)
|
||
return new_symbol_expr (think_sym);
|
||
|
||
sym = symtab_lookup (current_symtab, "think");
|
||
if (sym && sym->sy_type == sy_var && sym->type
|
||
&& sym->type->type == ev_field
|
||
&& sym->type->t.fldptr.type->type == ev_func) {
|
||
think_sym->type = sym->type->t.fldptr.type;
|
||
} else {
|
||
think_sym->type = &type_function;
|
||
}
|
||
think_sym = function_symbol (think_sym, 0, 1);
|
||
make_function (think_sym, 0, current_symtab->space, current_storage);
|
||
return new_symbol_expr (think_sym);
|
||
}
|
||
|
||
expr_t *
|
||
cast_expr (type_t *dstType, expr_t *e)
|
||
{
|
||
expr_t *c;
|
||
type_t *srcType;
|
||
|
||
convert_name (e);
|
||
|
||
if (e->type == ex_error)
|
||
return e;
|
||
|
||
srcType = get_type (e);
|
||
|
||
if (dstType == srcType)
|
||
return e;
|
||
|
||
if ((dstType == type_default && is_enum (srcType))
|
||
|| (is_enum (dstType) && srcType == type_default))
|
||
return e;
|
||
if ((is_pointer (dstType) && is_string (srcType))
|
||
|| (is_string (dstType) && is_pointer (srcType))) {
|
||
c = new_alias_expr (dstType, e);
|
||
return c;
|
||
}
|
||
if (!(is_pointer (dstType)
|
||
&& (is_pointer (srcType) || is_integral (srcType)
|
||
|| is_array (srcType)))
|
||
&& !(is_integral (dstType) && is_pointer (srcType))
|
||
&& !(is_func (dstType) && is_func (srcType))
|
||
&& !(is_scalar (dstType) && is_scalar (srcType))) {
|
||
return cast_error (e, srcType, dstType);
|
||
}
|
||
if (is_array (srcType)) {
|
||
return address_expr (e, 0, dstType->t.fldptr.type);
|
||
}
|
||
if (is_constant (e) && is_scalar (dstType) && is_scalar (srcType)) {
|
||
ex_value_t *val = 0;
|
||
if (e->type == ex_symbol && e->e.symbol->sy_type == sy_const) {
|
||
val = e->e.symbol->s.value;
|
||
} else if (e->type == ex_symbol
|
||
&& e->e.symbol->sy_type == sy_var) {
|
||
// initialized global def treated as a constant
|
||
// from the tests above, the def is known to be constant
|
||
// and of one of the three storable scalar types
|
||
def_t *def = e->e.symbol->s.def;
|
||
if (is_float (def->type)) {
|
||
val = new_float_val (D_FLOAT (def));
|
||
} else if (is_double (def->type)) {
|
||
val = new_double_val (D_DOUBLE (def));
|
||
} else if (is_integral (def->type)) {
|
||
val = new_integer_val (D_INT (def));
|
||
}
|
||
} else if (e->type == ex_value) {
|
||
val = e->e.value;
|
||
} else if (e->type == ex_nil) {
|
||
convert_nil (e, dstType);
|
||
return e;
|
||
}
|
||
if (!val)
|
||
internal_error (e, "unexpected constant expression type");
|
||
e->e.value = convert_value (val, dstType);
|
||
e->type = ex_value;
|
||
c = e;
|
||
} else if (is_integral (dstType) && is_integral (srcType)) {
|
||
c = new_alias_expr (dstType, e);
|
||
} else if (is_scalar (dstType) && is_scalar (srcType)) {
|
||
c = new_unary_expr ('C', e);
|
||
c->e.expr.type = dstType;
|
||
} else if (e->type == ex_uexpr && e->e.expr.op == '.') {
|
||
e->e.expr.type = dstType;
|
||
c = e;
|
||
} else {
|
||
c = new_alias_expr (dstType, e);
|
||
}
|
||
return c;
|
||
}
|
||
|
||
expr_t *
|
||
selector_expr (keywordarg_t *selector)
|
||
{
|
||
dstring_t *sel_id = dstring_newstr ();
|
||
expr_t *sel;
|
||
symbol_t *sel_sym;
|
||
symbol_t *sel_table;
|
||
int index;
|
||
|
||
selector = copy_keywordargs (selector);
|
||
selector = (keywordarg_t *) reverse_params ((param_t *) selector);
|
||
selector_name (sel_id, selector);
|
||
index = selector_index (sel_id->str);
|
||
index *= type_size (type_SEL.t.fldptr.type);
|
||
sel_sym = make_symbol ("_OBJ_SELECTOR_TABLE_PTR", &type_SEL,
|
||
pr.near_data, sc_static);
|
||
if (!sel_sym->table) {
|
||
symtab_addsymbol (pr.symtab, sel_sym);
|
||
sel_table = make_symbol ("_OBJ_SELECTOR_TABLE",
|
||
array_type (type_SEL.t.fldptr.type, 0),
|
||
pr.far_data, sc_extern);
|
||
if (!sel_table->table)
|
||
symtab_addsymbol (pr.symtab, sel_table);
|
||
reloc_def_def (sel_table->s.def, sel_sym->s.def);
|
||
}
|
||
sel = new_symbol_expr (sel_sym);
|
||
dstring_delete (sel_id);
|
||
sel = new_binary_expr ('&', sel, new_short_expr (index));
|
||
sel->e.expr.type = &type_SEL;
|
||
return sel;
|
||
}
|
||
|
||
expr_t *
|
||
protocol_expr (const char *protocol_name)
|
||
{
|
||
protocol_t *protocol = get_protocol (protocol_name, 0);
|
||
|
||
if (!protocol) {
|
||
return error (0, "cannot find protocol declaration for `%s'",
|
||
protocol_name);
|
||
}
|
||
class_t *proto_class = get_class (new_symbol ("Protocol"), 1);
|
||
return new_pointer_expr (0, proto_class->type, protocol_def (protocol));
|
||
}
|
||
|
||
expr_t *
|
||
encode_expr (type_t *type)
|
||
{
|
||
dstring_t *encoding = dstring_newstr ();
|
||
expr_t *e;
|
||
|
||
encode_type (encoding, type);
|
||
e = new_string_expr (encoding->str);
|
||
free (encoding);
|
||
return e;
|
||
}
|
||
|
||
expr_t *
|
||
super_expr (class_type_t *class_type)
|
||
{
|
||
symbol_t *sym;
|
||
expr_t *super;
|
||
expr_t *e;
|
||
expr_t *super_block;
|
||
class_t *class;
|
||
|
||
if (!class_type)
|
||
return error (0, "`super' used outside of class implementation");
|
||
|
||
class = extract_class (class_type);
|
||
|
||
if (!class->super_class)
|
||
return error (0, "%s has no super class", class->name);
|
||
|
||
sym = symtab_lookup (current_symtab, ".super");
|
||
if (!sym || sym->table != current_symtab) {
|
||
sym = new_symbol_type (".super", &type_obj_super);
|
||
initialize_def (sym, 0, current_symtab->space, sc_local);
|
||
}
|
||
super = new_symbol_expr (sym);
|
||
|
||
super_block = new_block_expr ();
|
||
|
||
e = assign_expr (field_expr (super, new_name_expr ("self")),
|
||
new_name_expr ("self"));
|
||
append_expr (super_block, e);
|
||
|
||
e = new_symbol_expr (class_pointer_symbol (class));
|
||
e = assign_expr (field_expr (super, new_name_expr ("class")),
|
||
field_expr (e, new_name_expr ("super_class")));
|
||
append_expr (super_block, e);
|
||
|
||
e = address_expr (super, 0, 0);
|
||
super_block->e.block.result = e;
|
||
return super_block;
|
||
}
|
||
|
||
expr_t *
|
||
message_expr (expr_t *receiver, keywordarg_t *message)
|
||
{
|
||
expr_t *args = 0, **a = &args;
|
||
expr_t *selector = selector_expr (message);
|
||
expr_t *call;
|
||
keywordarg_t *m;
|
||
int self = 0, super = 0, class_msg = 0;
|
||
type_t *rec_type;
|
||
type_t *return_type;
|
||
type_t *method_type = &type_IMP;
|
||
class_t *class = 0;
|
||
method_t *method;
|
||
expr_t *send_msg;
|
||
|
||
if (receiver->type == ex_symbol
|
||
&& strcmp (receiver->e.symbol->name, "super") == 0) {
|
||
super = 1;
|
||
|
||
receiver = super_expr (current_class);
|
||
|
||
if (receiver->type == ex_error)
|
||
return receiver;
|
||
receiver = cast_expr (&type_id, receiver); //FIXME better way?
|
||
class = extract_class (current_class);
|
||
} else {
|
||
if (receiver->type == ex_symbol) {
|
||
if (strcmp (receiver->e.symbol->name, "self") == 0)
|
||
self = 1;
|
||
if (receiver->e.symbol->sy_type == sy_class) {
|
||
class = receiver->e.symbol->type->t.class;
|
||
class_msg = 1;
|
||
receiver = new_symbol_expr (class_pointer_symbol (class));
|
||
}
|
||
} else if (receiver->type == ex_nil) {
|
||
convert_nil (receiver, &type_id);
|
||
}
|
||
rec_type = get_type (receiver);
|
||
|
||
if (receiver->type == ex_error)
|
||
return receiver;
|
||
|
||
if (rec_type == &type_id || rec_type == &type_Class) {
|
||
} else {
|
||
if (rec_type->type == ev_pointer)
|
||
rec_type = rec_type->t.fldptr.type;
|
||
if (!obj_is_class (rec_type))
|
||
return error (receiver, "not a class/object");
|
||
|
||
if (self) {
|
||
if (!class)
|
||
class = extract_class (current_class);
|
||
if (rec_type == &type_obj_class)
|
||
class_msg = 1;
|
||
} else {
|
||
if (!class)
|
||
class = rec_type->t.class;
|
||
}
|
||
}
|
||
}
|
||
|
||
return_type = &type_id;
|
||
method = class_message_response (class, class_msg, selector);
|
||
if (method)
|
||
return_type = method->type->t.func.type;
|
||
|
||
for (m = message; m; m = m->next) {
|
||
*a = m->expr;
|
||
while ((*a))
|
||
a = &(*a)->next;
|
||
}
|
||
*a = selector;
|
||
a = &(*a)->next;
|
||
*a = receiver;
|
||
|
||
send_msg = send_message (super);
|
||
if (method) {
|
||
expr_t *err;
|
||
if ((err = method_check_params (method, args)))
|
||
return err;
|
||
method_type = method->type;
|
||
}
|
||
call = build_function_call (send_msg, method_type, args);
|
||
|
||
if (call->type == ex_error)
|
||
return receiver;
|
||
|
||
call->e.block.result = new_ret_expr (return_type);
|
||
return call;
|
||
}
|
||
|
||
expr_t *
|
||
sizeof_expr (expr_t *expr, struct type_s *type)
|
||
{
|
||
if (!((!expr) ^ (!type)))
|
||
internal_error (0, 0);
|
||
if (!type)
|
||
type = get_type (expr);
|
||
expr = new_integer_expr (type_size (type));
|
||
return expr;
|
||
}
|
||
|
||
expr_t *
|
||
reverse_expr_list (expr_t *e)
|
||
{
|
||
expr_t *r = 0;
|
||
|
||
while (e) {
|
||
expr_t *t = e->next;
|
||
e->next = r;
|
||
r = e;
|
||
e = t;
|
||
}
|
||
return r;
|
||
}
|