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fix and check shifting issue

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The exception raised by << and >> when shifting mark_t by too many
bits are only enabled in SPOT_DEBUG, as those operations are quite
low-level.  However we were always testing them, and although we
wanted them to be active in Python, it was not always the case.

* spot/twa/acc.hh: introduce max_accsets() as
a static constexpr method, so we can see it in Python.
* spot/misc/bitset.hh: Fix preprocessing directive
so the check is actually enabled when compiling the Python
bindings.
* bin/autcross.cc, bin/autfilt.cc, bin/ltlcross.cc: Use max_accsets().
* tests/core/acc.cc: Comment out the shifting exception when
SPOT_DEBUG is unset.
* tests/python/except.py: Make sure the exception is always raised in
Python.
This commit is contained in:
Alexandre Duret-Lutz 2018-05-25 11:29:59 +02:00
parent 23e0d718fd
commit b12eb0508f
7 changed files with 75 additions and 38 deletions
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4
spot/misc/bitset.hh
View file

@ -151,7 +151,7 @@ namespace spot
bitset& operator<<=(unsigned s)
{
#if SPOT_DEBUG || SWIG
#if SPOT_DEBUG || defined(SWIGPYTHON)
if (SPOT_UNLIKELY(s >= 8 * N * sizeof(word_t)))
internal::report_bit_shift_too_big();
#else
@ -191,7 +191,7 @@ namespace spot
bitset& operator>>=(unsigned s)
{
#if SPOT_DEBUG || SWIG
#if SPOT_DEBUG || defined(SWIGPYTHON)
if (SPOT_UNLIKELY(s >= 8 * N * sizeof(word_t)))
internal::report_bit_shift_too_big();
#else

26
spot/twa/acc.hh
View file

@ -94,6 +94,16 @@ namespace spot
}
}
/// \brief The maximum number of acceptance sets supported by
/// this implementation.
///
/// The value can be changed at compile-time using configure's
/// --enable-max-accsets=N option.
constexpr static unsigned max_accsets()
{
return SPOT_MAX_ACCSETS;
}
static mark_t all()
{
return mark_t(_value_t::mone());
@ -220,7 +230,7 @@ namespace spot
return id ^ r.id;
}
#if SPOT_DEBUG || SWIG
#if SPOT_DEBUG || defined(SWIGPYTHON)
# define SPOT_WRAP_OP(ins) \
try \
{ \
@ -567,7 +577,7 @@ namespace spot
if (n == 0)
return inf({});
acc_cond::mark_t m = mark_t::all();
m >>= (SPOT_MAX_ACCSETS - n);
m >>= mark_t::max_accsets() - n;
return inf(m);
}
@ -576,7 +586,7 @@ namespace spot
if (n == 0)
return fin({});
acc_cond::mark_t m = mark_t::all();
m >>= (SPOT_MAX_ACCSETS - n);
m >>= mark_t::max_accsets() - n;
return fin(m);
}
@ -833,6 +843,8 @@ namespace spot
acc_code& operator<<=(unsigned sets)
{
if (SPOT_UNLIKELY(sets >= mark_t::max_accsets()))
report_too_many_sets();
if (empty())
return *this;
unsigned pos = size();
@ -1247,9 +1259,11 @@ namespace spot
if (num == 0)
return -1U;
unsigned j = num_;
num_ += num;
if (num_ > SPOT_MAX_ACCSETS)
num += j;
if (num > mark_t::max_accsets())
report_too_many_sets();
// Make sure we do not update if we raised an exception.
num_ = num;
all_ = all_sets_();
return j;
}
@ -1386,7 +1400,7 @@ namespace spot
protected:
mark_t all_sets_() const
{
return mark_t::all() >> (SPOT_MAX_ACCSETS - num_);
return mark_t::all() >> (spot::acc_cond::mark_t::max_accsets() - num_);
}
unsigned num_;