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29 std::size_t bit_field_bits = 0;
33 if(comp.get_name() == member)
36 if(comp.type().id() == ID_c_bit_field)
40 result += bit_field_bits / 8;
43 else if(comp.type().id() == ID_bool)
46 result += bit_field_bits / 8;
52 bit_field_bits == 0,
"padding ensures offset at byte boundaries");
54 if(!sub_size.has_value())
72 for(
const auto &comp : components)
74 if(comp.get_name()==member)
78 if(!member_bits.has_value())
81 offset += *member_bits;
94 return (*bits + 7) / 8;
102 if(type.
id()==ID_array)
109 const auto size = numeric_cast<mp_integer>(
to_array_type(type).size());
110 if(!size.has_value())
113 return (*sub) * (*size);
115 else if(type.
id()==ID_vector)
125 return (*sub) * size;
127 else if(type.
id()==ID_complex)
136 else if(type.
id()==ID_struct)
143 const typet &subtype = c.type();
146 if(!sub_size.has_value())
154 else if(type.
id()==ID_union)
163 const typet &subtype = c.type();
166 if(!sub_size.has_value())
169 if(*sub_size > result)
175 else if(type.
id()==ID_signedbv ||
176 type.
id()==ID_unsignedbv ||
177 type.
id()==ID_fixedbv ||
178 type.
id()==ID_floatbv ||
180 type.
id()==ID_c_bool ||
181 type.
id()==ID_c_bit_field)
185 else if(type.
id()==ID_c_enum)
189 else if(type.
id()==ID_c_enum_tag)
193 else if(type.
id()==ID_bool)
197 else if(type.
id()==ID_pointer)
205 else if(type.
id() == ID_union_tag)
209 else if(type.
id() == ID_struct_tag)
213 else if(type.
id()==ID_code)
217 else if(type.
id()==ID_string)
230 if(type.
id()==ID_struct)
233 else if(type.
id()==ID_union)
246 std::size_t bit_field_bits=0;
250 if(c.get_name() == member)
253 if(c.type().id() == ID_c_bit_field)
257 const std::size_t bytes = bit_field_bits / 8;
262 else if(c.type().id() == ID_bool)
265 const std::size_t bytes = bit_field_bits / 8;
273 bit_field_bits == 0,
"padding ensures offset at byte boundaries");
274 const typet &subtype = c.type();
276 if(!sub_size.has_value())
278 result =
plus_exprt(result, sub_size.value());
287 if(type.
id()==ID_array)
292 if(array_type.subtype().id() == ID_bool)
309 const auto size_casted =
314 else if(type.
id()==ID_vector)
319 if(vector_type.subtype().id() == ID_bool)
336 const auto size_casted =
341 else if(type.
id()==ID_complex)
350 else if(type.
id()==ID_struct)
355 std::size_t bit_field_bits=0;
359 if(c.type().id() == ID_c_bit_field)
363 const std::size_t bytes = bit_field_bits / 8;
368 else if(c.type().id() == ID_bool)
371 const std::size_t bytes = bit_field_bits / 8;
379 bit_field_bits == 0,
"padding ensures offset at byte boundaries");
380 const typet &subtype = c.type();
382 if(!sub_size_opt.has_value())
385 result =
plus_exprt(result, sub_size_opt.value());
391 else if(type.
id()==ID_union)
402 const typet &subtype = c.type();
407 if(!sub_bits.has_value())
412 if(!sub_size_opt.has_value())
414 sub_size = sub_size_opt.value();
422 if(max_bytes<sub_bytes)
443 else if(type.
id()==ID_signedbv ||
444 type.
id()==ID_unsignedbv ||
445 type.
id()==ID_fixedbv ||
446 type.
id()==ID_floatbv ||
448 type.
id()==ID_c_bool ||
449 type.
id()==ID_c_bit_field)
452 std::size_t bytes=width/8;
457 else if(type.
id()==ID_c_enum)
461 std::size_t bytes=width/8;
466 else if(type.
id()==ID_c_enum_tag)
470 else if(type.
id()==ID_bool)
474 else if(type.
id()==ID_pointer)
481 std::size_t bytes=width/8;
486 else if(type.
id() == ID_union_tag)
490 else if(type.
id() == ID_struct_tag)
494 else if(type.
id()==ID_code)
498 else if(type.
id()==ID_string)
509 if(expr.
id()==ID_symbol)
517 else if(expr.
id()==ID_index)
522 "index into array expected, found " +
532 if(sub_size.has_value() && *sub_size > 0)
534 const auto i = numeric_cast<mp_integer>(index_expr.
index());
536 return (*o) + (*i) * (*sub_size);
542 else if(expr.
id()==ID_member)
552 if(type.
id()==ID_union)
562 else if(expr.
id()==ID_string_constant)
572 static_cast<const typet &
>(expr.
find(ID_C_c_sizeof_type));
578 auto val = numeric_cast<mp_integer>(expr);
581 !type_size.has_value() || *type_size < 0 || !val.has_value() ||
582 *val < *type_size || (*type_size == 0 && *val > 0))
590 "sizeof value does not fit size_type");
596 remainder = *val % *type_size;
601 exprt result(ID_sizeof, t);
602 result.
set(ID_type_arg, type);
615 const typet &target_type_raw,
618 if(offset_bytes == 0 && expr.
type() == target_type_raw)
622 if(expr.
type() != target_type_raw)
623 result.
type() = target_type_raw;
629 offset_bytes == 0 && expr.
type().
id() == ID_pointer &&
630 target_type_raw.
id() == ID_pointer)
637 if(!target_size_bits.has_value())
640 if(source_type.
id()==ID_struct)
648 if(!m_size_bits.has_value())
654 offset_bytes * 8 >= m_offset_bits && m_offset_bits % 8 == 0 &&
655 offset_bytes * 8 + *target_size_bits <= m_offset_bits + *m_size_bits)
659 member, offset_bytes - m_offset_bits / 8, target_type_raw, ns);
662 m_offset_bits += *m_size_bits;
665 else if(source_type.
id()==ID_array)
673 !elem_size_bits.has_value() || *elem_size_bits == 0 ||
674 *elem_size_bits % 8 != 0)
679 if(*target_size_bits <= *elem_size_bits)
681 const mp_integer elem_size_bytes = *elem_size_bits / 8;
682 const auto offset_inside_elem = offset_bytes % elem_size_bytes;
683 const auto target_size_bytes = *target_size_bits / 8;
685 if(offset_inside_elem + target_size_bytes <= elem_size_bytes)
707 const typet &target_type,
710 const auto offset_bytes = numeric_cast<mp_integer>(offset);
712 if(!offset_bytes.has_value())
const componentst & components() const
const union_tag_typet & to_union_tag_type(const typet &type)
Cast a typet to a union_tag_typet.
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
const c_enum_tag_typet & to_c_enum_tag_type(const typet &type)
Cast a typet to a c_enum_tag_typet.
static exprt conditional_cast(const exprt &expr, const typet &type)
const typet & subtype() const
const struct_typet & to_struct_type(const typet &type)
Cast a typet to a struct_typet.
const struct_union_typet & to_struct_union_type(const typet &type)
Cast a typet to a struct_union_typet.
std::size_t size() const
Amount of nodes this expression tree contains.
optionalt< mp_integer > member_offset_bits(const struct_typet &type, const irep_idt &member, const namespacet &ns)
const c_enum_typet & to_c_enum_type(const typet &type)
Cast a typet to a c_enum_typet.
The type of an expression, extends irept.
const index_exprt & to_index_expr(const exprt &expr)
Cast an exprt to an index_exprt.
Base type for structs and unions.
The trinary if-then-else operator.
const irept & find(const irep_namet &name) const
The plus expression Associativity is not specified.
Base class for all expressions.
std::vector< componentt > componentst
const union_typet & follow_tag(const union_tag_typet &) const
Follow type tag of union type.
auto component(T &struct_expr, const irep_idt &name, const namespacet &ns) -> decltype(struct_expr.op0())
const complex_typet & to_complex_type(const typet &type)
Cast a typet to a complex_typet.
bitvector_typet index_type()
A namespacet is essentially one or two symbol tables bound together, to allow for symbol lookups in t...
optionalt< mp_integer > compute_pointer_offset(const exprt &expr, const namespacet &ns)
irep_idt byte_extract_id()
typet & type()
Return the type of the expression.
bool get_bool(const irep_namet &name) const
Expression classes for byte-level operators.
bool is_ssa_expr(const exprt &expr)
#define DATA_INVARIANT(CONDITION, REASON)
This condition should be used to document that assumptions that are made on goto_functions,...
const ssa_exprt & to_ssa_expr(const exprt &expr)
Cast a generic exprt to an ssa_exprt.
const exprt & struct_op() const
#define PRECONDITION(CONDITION)
optionalt< mp_integer > pointer_offset_bits(const typet &type, const namespacet &ns)
const c_bit_field_typet & to_c_bit_field_type(const typet &type)
Cast a typet to a c_bit_field_typet.
const std::string & id_string() const
bool simplify(exprt &expr, const namespacet &ns)
Binary multiplication Associativity is not specified.
exprt simplify_expr(exprt src, const namespacet &ns)
const irep_idt & id() const
const struct_tag_typet & to_struct_tag_type(const typet &type)
Cast a typet to a struct_tag_typet.
nonstd::optional< T > optionalt
const constant_exprt & size() const
std::size_t get_width() const
Extract member of struct or union.
Structure type, corresponds to C style structs.
optionalt< mp_integer > pointer_offset_size(const typet &type, const namespacet &ns)
Compute the size of a type in bytes, rounding up to full bytes.
optionalt< exprt > build_sizeof_expr(const constant_exprt &expr, const namespacet &ns)
const typet & follow(const typet &) const
Resolve type symbol to the type it points to.
void set(const irep_namet &name, const irep_idt &value)
optionalt< exprt > get_subexpression_at_offset(const exprt &expr, const mp_integer &offset_bytes, const typet &target_type_raw, const namespacet &ns)
A base class for relations, i.e., binary predicates whose two operands have the same type.
const array_typet & to_array_type(const typet &type)
Cast a typet to an array_typet.
const vector_typet & to_vector_type(const typet &type)
Cast a typet to a vector_typet.
optionalt< exprt > size_of_expr(const typet &type, const namespacet &ns)
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
irep_idt get_component_name() const
const union_typet & to_union_type(const typet &type)
Cast a typet to a union_typet.
Semantic type conversion.
unsignedbv_typet size_type()
A constant literal expression.
optionalt< exprt > member_offset_expr(const member_exprt &member_expr, const namespacet &ns)
API to expression classes.
optionalt< mp_integer > member_offset(const struct_typet &type, const irep_idt &member, const namespacet &ns)
const bitvector_typet & to_bitvector_type(const typet &type)
Cast a typet to a bitvector_typet.