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Added sbv2s (#5413)

Browse source 
* Added sbv2s

* Fixed indention

Co-authored-by: Clemens Eisenhofer <Clemens.Eisenhofer@tuwien.ac.at>
This commit is contained in:
CEisenhofer 2021-07-16 17:58:28 +02:00 committed by GitHub
parent 9e5dcf3ecb
commit 0fa4b63d26
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 104 additions and 22 deletions
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1
src/api/api_ast.cpp
View file

@ -1203,6 +1203,7 @@ extern "C" {
case OP_STRING_STOI: return Z3_OP_STR_TO_INT;
case OP_STRING_ITOS: return Z3_OP_INT_TO_STR;
case OP_STRING_UBVTOS: return Z3_OP_UBV_TO_STR;
case OP_STRING_SBVTOS: return Z3_OP_SBV_TO_STR;
case OP_STRING_LT: return Z3_OP_STRING_LT;
case OP_STRING_LE: return Z3_OP_STRING_LE;

1
src/api/api_seq.cpp
View file

@ -245,6 +245,7 @@ extern "C" {
MK_UNARY(Z3_mk_int_to_str, mk_c(c)->get_seq_fid(), OP_STRING_ITOS, SKIP);
MK_UNARY(Z3_mk_str_to_int, mk_c(c)->get_seq_fid(), OP_STRING_STOI, SKIP);
MK_UNARY(Z3_mk_ubv_to_str, mk_c(c)->get_seq_fid(), OP_STRING_UBVTOS, SKIP);
MK_UNARY(Z3_mk_sbv_to_str, mk_c(c)->get_seq_fid(), OP_STRING_SBVTOS, SKIP);
Z3_ast Z3_API Z3_mk_re_loop(Z3_context c, Z3_ast r, unsigned lo, unsigned hi) {

5
src/api/c++/z3++.h
View file

@ -1447,6 +1447,11 @@ namespace z3 {
check_error();
return expr(ctx(), r);
}
expr sbvtos() const {
Z3_ast r = Z3_mk_sbv_to_str(ctx(), *this);
check_error();
return expr(ctx(), r);
}
friend expr range(expr const& lo, expr const& hi);
/**

9
src/api/dotnet/Context.cs
View file

@ -2405,6 +2405,15 @@ namespace Microsoft.Z3
return new SeqExpr(this, Native.Z3_mk_ubv_to_str(nCtx, e.NativeObject));
}
/// <summary>
/// Convert a bit-vector expression, represented as an signed number, to a string.
/// </summary>
public SeqExpr SbvToString(Expr e) {
Debug.Assert(e != null);
Debug.Assert(e is ArithExpr);
return new SeqExpr(this, Native.Z3_mk_sbv_to_str(nCtx, e.NativeObject));
}
/// <summary>
/// Convert an integer expression to a string.
/// </summary>

8
src/api/java/Context.java
View file

@ -2036,6 +2036,14 @@ public class Context implements AutoCloseable {
return (SeqExpr<CharSort>) Expr.create(this, Native.mkUbvToStr(nCtx(), e.getNativeObject()));
}
/**
* Convert an signed bitvector expression to a string.
*/
public SeqExpr<CharSort> sbvToString(Expr<BitVecSort> e)
{
return (SeqExpr<CharSort>) Expr.create(this, Native.mkSbvToStr(nCtx(), e.getNativeObject()));
}
/**
* Convert an integer expression to a string.
*/

7
src/api/z3_api.h
View file

@ -1203,6 +1203,7 @@ typedef enum {
Z3_OP_STR_TO_INT,
Z3_OP_INT_TO_STR,
Z3_OP_UBV_TO_STR,
Z3_OP_SBV_TO_STR,
Z3_OP_STRING_LT,
Z3_OP_STRING_LE,
@ -3655,6 +3656,12 @@ extern "C" {
*/
Z3_ast Z3_API Z3_mk_ubv_to_str(Z3_context c, Z3_ast s);
/**
\brief Signed bit-vector to string conversion.
def_API('Z3_mk_sbv_to_str' ,AST ,(_in(CONTEXT), _in(AST)))
*/
Z3_ast Z3_API Z3_mk_sbv_to_str(Z3_context c, Z3_ast s);
/**
\brief Create a regular expression that accepts the sequence \c seq.

1
src/ast/bv_decl_plugin.h
View file

@ -406,6 +406,7 @@ public:
app * mk_ule(expr * arg1, expr * arg2) { return m_manager.mk_app(get_fid(), OP_ULEQ, arg1, arg2); }
app * mk_sle(expr * arg1, expr * arg2) { return m_manager.mk_app(get_fid(), OP_SLEQ, arg1, arg2); }
app * mk_slt(expr * arg1, expr * arg2) { return m_manager.mk_app(get_fid(), OP_SLT, arg1, arg2); }
app * mk_extract(unsigned high, unsigned low, expr * n) {
parameter params[2] = { parameter(high), parameter(low) };
return m_manager.mk_app(get_fid(), OP_EXTRACT, 2, params, 1, &n);

28
src/ast/rewriter/seq_rewriter.cpp
View file

@ -718,6 +718,10 @@ br_status seq_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
SASSERT(num_args == 1);
st = mk_str_ubv2s(args[0], result);
break;
case OP_STRING_SBVTOS:
SASSERT(num_args == 1);
st = mk_str_sbv2s(args[0], result);
break;
case _OP_STRING_CONCAT:
case _OP_STRING_PREFIX:
case _OP_STRING_SUFFIX:
@ -2218,6 +2222,30 @@ br_status seq_rewriter::mk_str_ubv2s(expr* a, expr_ref& result) {
return BR_FAILED;
}
br_status seq_rewriter::mk_str_sbv2s(expr *a, expr_ref &result) {
bv_util bv(m());
rational val;
unsigned bv_size = 0;
if (bv.is_numeral(a, val, bv_size)) {
rational r = mod(val, rational::power_of_two(bv_size));
SASSERT(!r.is_neg());
if (r >= rational::power_of_two(bv_size - 1)) {
r -= rational::power_of_two(bv_size);
}
result = str().mk_string(zstring(r));
return BR_DONE;
}
bv_size = bv.get_bv_size(a);
result = m().mk_ite(
bv.mk_slt(a,bv.mk_numeral(0, bv_size)),
str().mk_concat(
str().mk_string(zstring("-")),
str().mk_ubv2s(bv.mk_bv_neg(a))
),
str().mk_ubv2s(a));
return BR_REWRITE_FULL;
}
br_status seq_rewriter::mk_str_itos(expr* a, expr_ref& result) {
rational r;

1
src/ast/rewriter/seq_rewriter.h
View file

@ -229,6 +229,7 @@ class seq_rewriter {
br_status mk_str_itos(expr* a, expr_ref& result);
br_status mk_str_stoi(expr* a, expr_ref& result);
br_status mk_str_ubv2s(expr* a, expr_ref& result);
br_status mk_str_sbv2s(expr* a, expr_ref& result);
br_status mk_str_in_regexp(expr* a, expr* b, expr_ref& result);
br_status mk_str_to_regexp(expr* a, expr_ref& result);
br_status mk_str_le(expr* a, expr* b, expr_ref& result);

20
src/ast/seq_decl_plugin.cpp
View file

@ -350,7 +350,7 @@ func_decl* seq_decl_plugin::mk_left_assoc_fun(decl_kind k, unsigned arity, sort*
return mk_assoc_fun(k, arity, domain, range, k_seq, k_string, false);
}
func_decl* seq_decl_plugin::mk_ubv2s(unsigned arity, sort* const* domain) {
func_decl* seq_decl_plugin::mk_ubv2s(unsigned arity, sort* const* domain) const {
ast_manager& m = *m_manager;
if (arity != 1)
m.raise_exception("Invalid str.from_ubv expects one bit-vector argument");
@ -361,6 +361,17 @@ func_decl* seq_decl_plugin::mk_ubv2s(unsigned arity, sort* const* domain) {
return m.mk_func_decl(symbol("str.from_ubv"), arity, domain, rng, func_decl_info(m_family_id, OP_STRING_UBVTOS));
}
func_decl* seq_decl_plugin::mk_sbv2s(unsigned arity, sort* const* domain) const {
ast_manager &m = *m_manager;
if (arity != 1)
m.raise_exception("Invalid str.from_sbv expects one bit-vector argument");
bv_util bv(m);
if (!bv.is_bv_sort(domain[0]))
m.raise_exception("Invalid str.from_sbv expects one bit-vector argument");
sort *rng = m_string;
return m.mk_func_decl(symbol("str.from_sbv"), arity, domain, rng, func_decl_info(m_family_id, OP_STRING_SBVTOS));
}
func_decl* seq_decl_plugin::mk_assoc_fun(decl_kind k, unsigned arity, sort* const* domain, sort* range, decl_kind k_seq, decl_kind k_string, bool is_right) {
ast_manager& m = *m_manager;
sort_ref rng(m);
@ -376,7 +387,7 @@ func_decl* seq_decl_plugin::mk_assoc_fun(decl_kind k, unsigned arity, sort* cons
}
func_decl * seq_decl_plugin::mk_func_decl(decl_kind k, unsigned num_parameters, parameter const * parameters,
func_decl* seq_decl_plugin::mk_func_decl(decl_kind k, unsigned num_parameters, parameter const * parameters,
unsigned arity, sort * const * domain, sort * range) {
init();
m_has_seq = true;
@ -416,9 +427,13 @@ func_decl * seq_decl_plugin::mk_func_decl(decl_kind k, unsigned num_parameters,
case OP_STRING_FROM_CODE:
match(*m_sigs[k], arity, domain, range, rng);
return m.mk_func_decl(m_sigs[k]->m_name, arity, domain, rng, func_decl_info(m_family_id, k));
case OP_STRING_UBVTOS:
return mk_ubv2s(arity, domain);
case OP_STRING_SBVTOS:
return mk_sbv2s(arity, domain);
case _OP_REGEXP_FULL_CHAR:
m_has_re = true;
if (!range) range = mk_reglan();
@ -627,6 +642,7 @@ void seq_decl_plugin::get_op_names(svector<builtin_name> & op_names, symbol cons
op_names.push_back(builtin_name("re.nostr", _OP_REGEXP_EMPTY));
op_names.push_back(builtin_name("re.complement", OP_RE_COMPLEMENT));
op_names.push_back(builtin_name("str.from_ubv", OP_STRING_UBVTOS));
op_names.push_back(builtin_name("str.from_sbv", OP_STRING_SBVTOS));
}
void seq_decl_plugin::get_sort_names(svector<builtin_name> & sort_names, symbol const & logic) {

7
src/ast/seq_decl_plugin.h
View file

@ -80,6 +80,7 @@ enum seq_op_kind {
OP_STRING_ITOS,
OP_STRING_STOI,
OP_STRING_UBVTOS,
OP_STRING_SBVTOS,
OP_STRING_LT,
OP_STRING_LE,
OP_STRING_IS_DIGIT,
@ -150,7 +151,8 @@ class seq_decl_plugin : public decl_plugin {
func_decl* mk_assoc_fun(decl_kind k, unsigned arity, sort* const* domain, sort* range, decl_kind k_string, decl_kind k_seq);
func_decl* mk_left_assoc_fun(decl_kind k, unsigned arity, sort* const* domain, sort* range, decl_kind k_string, decl_kind k_seq);
func_decl* mk_assoc_fun(decl_kind k, unsigned arity, sort* const* domain, sort* range, decl_kind k_string, decl_kind k_seq, bool is_right);
func_decl* mk_ubv2s(unsigned arity, sort* const* domain);
func_decl* mk_ubv2s(unsigned arity, sort* const* domain) const;
func_decl* mk_sbv2s(unsigned arity, sort* const* domain) const;
void init();
@ -297,6 +299,7 @@ public:
app* mk_itos(expr* i) const { return m.mk_app(m_fid, OP_STRING_ITOS, 1, &i); }
app* mk_stoi(expr* s) const { return m.mk_app(m_fid, OP_STRING_STOI, 1, &s); }
app* mk_ubv2s(expr* b) const { return m.mk_app(m_fid, OP_STRING_UBVTOS, 1, &b); }
app* mk_sbv2s(expr* b) const { return m.mk_app(m_fid, OP_STRING_SBVTOS, 1, &b); }
app* mk_is_empty(expr* s) const;
app* mk_lex_lt(expr* a, expr* b) const { expr* es[2] = { a, b }; return m.mk_app(m_fid, OP_STRING_LT, 2, es); }
app* mk_lex_le(expr* a, expr* b) const { expr* es[2] = { a, b }; return m.mk_app(m_fid, OP_STRING_LE, 2, es); }
@ -336,6 +339,7 @@ public:
bool is_itos(expr const* n) const { return is_app_of(n, m_fid, OP_STRING_ITOS); }
bool is_stoi(expr const* n) const { return is_app_of(n, m_fid, OP_STRING_STOI); }
bool is_ubv2s(expr const* n) const { return is_app_of(n, m_fid, OP_STRING_UBVTOS); }
bool is_sbv2s(expr const* n) const { return is_app_of(n, m_fid, OP_STRING_SBVTOS); }
bool is_in_re(expr const* n) const { return is_app_of(n, m_fid, OP_SEQ_IN_RE); }
bool is_unit(expr const* n) const { return is_app_of(n, m_fid, OP_SEQ_UNIT); }
bool is_lt(expr const* n) const { return is_app_of(n, m_fid, OP_STRING_LT); }
@ -374,6 +378,7 @@ public:
MATCH_UNARY(is_itos);
MATCH_UNARY(is_stoi);
MATCH_UNARY(is_ubv2s);
MATCH_UNARY(is_sbv2s);
MATCH_UNARY(is_is_digit);
MATCH_UNARY(is_from_code);
MATCH_UNARY(is_to_code);