#15820: Implement sequences of bounded integers
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Reporter: SimonKing | Owner:
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: algebra | Resolution:
Keywords: sequence bounded | Merged in:
integer | Reviewers:
Authors: Simon King | Work issues:
Report Upstream: N/A | Commit:
Branch: | 93546db866564a80d80df30de48934697e2b0d1d
u/SimonKing/ticket/15820 | Stopgaps:
Dependencies: |
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Comment (by SimonKing):
Since I cannot reproduce the problem myself, could you please help me by
providing some internal data? Perhaps there are different architectures
(32bit or 64bit, big or little endian) at work?
Please add the following as a method of `BoundedIntegerSequence`:
{{{
#!python
def inspect(self):
cdef __mpz_struct seq
seq = deref(<__mpz_struct*>self.data.data)
print "bitsize",self.data.bitsize
print "itembitsize",self.data.itembitsize
print "mask_item", Integer(self.data.mask_item).binary()
print "length", self.data.length
print "GMP size", seq._mp_size
print "GMP alloc", seq._mp_alloc
print
'.'.join([Integer(seq._mp_d[limb]).binary().rjust(mp_bits_per_limb,'0')
for limb in range(seq._mp_size-1,-1,-1)])
}}}
With this, I get
{{{
sage: from sage.misc.bounded_integer_sequences import
BoundedIntegerSequence
sage: S = BoundedIntegerSequence(21, [4,1,6,2,7,20,9])
sage: S.inspect()
bitsize 35
itembitsize 5
mask_item 11111
length 7
GMP size 2
GMP alloc 3
00000000000000000000000000000010.01101000011100010001100000100100
sage: S[1::2]
<1, 2, 20>
sage: (S[1::2]).inspect()
bitsize 15
itembitsize 5
mask_item 11111
length 3
GMP size 1
GMP alloc 2
00000000000000000101000001000001
sage: S[-1::-2]
<9, 7, 6, 4>
sage: (S[-1::-2]).inspect()
bitsize 20
itembitsize 5
mask_item 11111
length 4
GMP size 1
GMP alloc 2
00000000000000100001100011101001
}}}
What do you get instead?
--
Ticket URL: <http://trac.sagemath.org/ticket/15820#comment:108>
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