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Add inplace variants for rz_bv_(un)signed_cast() (#6164)

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Florian Märkl 2026-04-06 17:09:05 +02:00 committed by GitHub
parent f007f5f309
commit 995f73b1ad
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3 changed files with 47 additions and 0 deletions
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2
librz/include/rz_util/rz_bitvector.h
View file

@ -144,7 +144,9 @@ RZ_API ut32 rz_bv_hash(RZ_NULLABLE RzBitVector *x);
RZ_API RZ_OWN RzBitVector *rz_bv_pred(RZ_NONNULL RzBitVector *bv);
RZ_API RZ_OWN RzBitVector *rz_bv_succ(RZ_NONNULL RzBitVector *bv);
RZ_API bool rz_bv_arshift(RZ_NONNULL RzBitVector *bv, ut32 dist);
RZ_API bool rz_bv_signed_cast_inplace(RZ_INOUT RZ_NONNULL RzBitVector *bv, ut32 to_size);
RZ_API RZ_OWN RzBitVector *rz_bv_signed_cast(RZ_NONNULL RzBitVector *bv, ut32 to_size);
RZ_API bool rz_bv_unsigned_cast_inplace(RZ_INOUT RZ_NONNULL RzBitVector *bv, ut32 to_size);
RZ_API RZ_OWN RzBitVector *rz_bv_unsigned_cast(RZ_NONNULL RzBitVector *bv, ut32 to_size);
RZ_API bool rz_bv_slt(RZ_NONNULL RzBitVector *x, RZ_NONNULL RzBitVector *y);

20
librz/util/bitvector.c
View file

@ -2312,6 +2312,16 @@ RZ_API RzBitVector *rz_bv_cast(RZ_NONNULL RzBitVector *bv, ut32 to_size, bool fi
return ret;
}
/**
* signed cast of bv, (signed_cast x n) = (cast x n (msb x))
* \param bv The vector which is cast in place. Its length changes.
* \param to_size cast bitvector length
* \return True if casting succeeded, false in case of failure.
*/
RZ_API bool rz_bv_signed_cast_inplace(RZ_INOUT RZ_NONNULL RzBitVector *bv, ut32 to_size) {
return rz_bv_cast_inplace(bv, to_size, rz_bv_msb(bv));
}
/**
* signed cast of bv, (signed_cast x n) = (cast x n (msb x))
* \param bv
@ -2322,6 +2332,16 @@ RZ_API RZ_OWN RzBitVector *rz_bv_signed_cast(RZ_NONNULL RzBitVector *bv, ut32 to
return rz_bv_cast(bv, to_size, rz_bv_msb(bv));
}
/**
* unsigned cast of bv, (signed_cast x n) = (cast x n 0)
* \param bv The vector which is cast in place. Its length changes.
* \param to_size cast bitvector length
* \return True if casting succeeded, false in case of failure.
*/
RZ_API bool rz_bv_unsigned_cast_inplace(RZ_INOUT RZ_NONNULL RzBitVector *bv, ut32 to_size) {
return rz_bv_cast_inplace(bv, to_size, false);
}
/**
* unsigned cast of bv, (unsigned_cast x n) = (cast x n 0)
* \param bv

25
test/unit/test_bitvector.c
View file

@ -1603,6 +1603,31 @@ bool test_rz_bv_cast_inplace(void) {
rz_bv_free(small);
rz_bv_free(large);
small = rz_bv_new_from_ut64(20, 0xe1234);
mu_assert_true(rz_bv_unsigned_cast_inplace(small, 24), "Cast failed");
mu_assert_eq(small->len, 24, "new size");
mu_assert_streq_free(rz_bv_as_hex_string(small, false), "0xe1234", "unsigned cast inplace result");
rz_bv_free(small);
small = rz_bv_new_from_ut64(20, 0x31234);
mu_assert_true(rz_bv_unsigned_cast_inplace(small, 24), "Cast failed");
mu_assert_eq(small->len, 24, "new size");
mu_assert_streq_free(rz_bv_as_hex_string(small, false), "0x31234", "unsigned cast inplace result");
rz_bv_free(small);
small = rz_bv_new_from_ut64(20, 0xe1234);
mu_assert_true(rz_bv_signed_cast_inplace(small, 24), "Cast failed");
mu_assert_eq(small->len, 24, "new size");
mu_assert_streq_free(rz_bv_as_hex_string(small, false), "0xfe1234", "signed cast inplace result");
rz_bv_free(small);
small = rz_bv_new_from_ut64(20, 0x31234);
mu_assert_true(rz_bv_signed_cast_inplace(small, 24), "Cast failed");
mu_assert_eq(small->len, 24, "new size");
mu_assert_streq_free(rz_bv_as_hex_string(small, false), "0x31234", "signed cast inplace result");
rz_bv_free(small);
mu_end;
}