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add ubv2s step 1

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This commit is contained in:
Nikolaj Bjorner 2021-07-12 12:53:00 +02:00
parent 805bb58289
commit 1bc10cebc5
4 changed files with 34 additions and 3 deletions
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14
src/ast/rewriter/seq_rewriter.cpp
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@ -714,6 +714,10 @@ br_status seq_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * con
SASSERT(num_args == 1);
st = mk_str_stoi(args[0], result);
break;
case OP_STRING_UBVTOS:
SASSERT(num_args == 1);
st = mk_str_ubv2s(args[0], result);
break;
case _OP_STRING_CONCAT:
case _OP_STRING_PREFIX:
case _OP_STRING_SUFFIX:
@ -2204,6 +2208,11 @@ br_status seq_rewriter::mk_str_is_digit(expr* a, expr_ref& result) {
}
br_status seq_rewriter::mk_str_ubv2s(expr* a, expr_ref& result) {
return BR_FAILED;
}
br_status seq_rewriter::mk_str_itos(expr* a, expr_ref& result) {
rational r;
if (m_autil.is_numeral(a, r)) {
@ -2265,6 +2274,11 @@ br_status seq_rewriter::mk_str_stoi(expr* a, expr_ref& result) {
result = m().mk_ite(m_autil.mk_ge(b, zero()), b, minus_one());
return BR_DONE;
}
if (str().is_ubv2s(a, b)) {
bv_util bv(m());
result = bv.mk_bv2int(b);
return BR_DONE;
}
expr* c = nullptr, *t = nullptr, *e = nullptr;
if (m().is_ite(a, c, t, e)) {

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

@ -228,6 +228,7 @@ class seq_rewriter {
br_status mk_str_units(func_decl* f, expr_ref& result);
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_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);