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object_id.cpp
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1/*******************************************************************\
2
3Module: Object Identifiers
4
5Author: Daniel Kroening, kroening@kroening.com
6
7\*******************************************************************/
8
11
12#include "object_id.h"
13
15
16#include <util/pointer_expr.h>
17
18enum class get_modet { LHS_R, LHS_W, READ };
19
21 get_modet mode,
22 const exprt &expr,
23 object_id_sett &dest,
24 const std::string &suffix)
25{
26 if(expr.id()==ID_symbol)
27 {
28 if(mode==get_modet::LHS_W || mode==get_modet::READ)
29 dest.insert(object_idt(to_symbol_expr(expr)));
30 }
31 else if(expr.id()==ID_index)
32 {
34
35 if(mode==get_modet::LHS_R || mode==get_modet::READ)
36 get_objects_rec(get_modet::READ, index_expr.index(), dest, "");
37
38 if(mode==get_modet::LHS_R)
39 get_objects_rec(get_modet::READ, index_expr.array(), dest, "[]"+suffix);
40 else
41 get_objects_rec(mode, index_expr.array(), dest, "[]"+suffix);
42 }
43 else if(expr.id()==ID_if)
44 {
45 const if_exprt &if_expr=to_if_expr(expr);
46
47 if(mode==get_modet::LHS_R || mode==get_modet::READ)
48 get_objects_rec(get_modet::READ, if_expr.cond(), dest, "");
49
50 get_objects_rec(mode, if_expr.true_case(), dest, suffix);
51 get_objects_rec(mode, if_expr.false_case(), dest, suffix);
52 }
53 else if(expr.id()==ID_member)
54 {
56
57 get_objects_rec(mode, member_expr.struct_op(), dest,
58 "."+id2string(member_expr.get_component_name())+suffix);
59 }
60 else if(expr.id()==ID_dereference)
61 {
62 const dereference_exprt &dereference_expr=
64
65 if(mode==get_modet::LHS_R || mode==get_modet::READ)
66 get_objects_rec(get_modet::READ, dereference_expr.pointer(), dest, "");
67 }
68 else
69 {
70 if(mode==get_modet::LHS_R || mode==get_modet::READ)
71 {
72 for(const auto &op : expr.operands())
73 get_objects_rec(get_modet::READ, op, dest, "");
74 }
75 }
76}
77
78void get_objects(const exprt &expr, object_id_sett &dest)
79{
80 get_objects_rec(get_modet::READ, expr, dest, "");
81}
82
83void get_objects_r(const code_assignt &assign, object_id_sett &dest)
84{
85 get_objects_rec(get_modet::LHS_R, assign.lhs(), dest, "");
86 get_objects_rec(get_modet::READ, assign.rhs(), dest, "");
87}
88
89void get_objects_w(const code_assignt &assign, object_id_sett &dest)
90{
91 get_objects_rec(get_modet::LHS_W, assign.lhs(), dest, "");
92}
93
94void get_objects_w(const exprt &lhs, object_id_sett &dest)
95{
96 get_objects_rec(get_modet::LHS_W, lhs, dest, "");
97}
98
99void get_objects_r_lhs(const exprt &lhs, object_id_sett &dest)
100{
101 get_objects_rec(get_modet::LHS_R, lhs, dest, "");
102}
ait supplies three of the four components needed: an abstract interpreter (in this case handling func...
Definition ai.h:562
A goto_instruction_codet representing an assignment in the program.
Operator to dereference a pointer.
Base class for all expressions.
Definition expr.h:56
operandst & operands()
Definition expr.h:94
The trinary if-then-else operator.
Definition std_expr.h:2502
Array index operator.
Definition std_expr.h:1470
const irep_idt & id() const
Definition irep.h:388
Extract member of struct or union.
Definition std_expr.h:2972
const std::string & id2string(const irep_idt &d)
Definition irep.h:44
get_modet
Definition object_id.cpp:18
void get_objects_r_lhs(const exprt &lhs, object_id_sett &dest)
Definition object_id.cpp:99
void get_objects(const exprt &expr, object_id_sett &dest)
Definition object_id.cpp:78
void get_objects_r(const code_assignt &assign, object_id_sett &dest)
Definition object_id.cpp:83
void get_objects_rec(get_modet mode, const exprt &expr, object_id_sett &dest, const std::string &suffix)
Definition object_id.cpp:20
void get_objects_w(const code_assignt &assign, object_id_sett &dest)
Definition object_id.cpp:89
Object Identifiers.
std::set< object_idt > object_id_sett
Definition object_id.h:58
API to expression classes for Pointers.
const dereference_exprt & to_dereference_expr(const exprt &expr)
Cast an exprt to a dereference_exprt.
const index_exprt & to_index_expr(const exprt &expr)
Cast an exprt to an index_exprt.
Definition std_expr.h:1538
const if_exprt & to_if_expr(const exprt &expr)
Cast an exprt to an if_exprt.
Definition std_expr.h:2582
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
Definition std_expr.h:3064
const symbol_exprt & to_symbol_expr(const exprt &expr)
Cast an exprt to a symbol_exprt.
Definition std_expr.h:272