Force std::size_t to use UInt64 (unsigned long)

[greg.ruthenbeck]

Hi,

I'm using Boost::uBLAS::mapped_matrix for working with sparse matrices.
At the moment, the maximum dimension of mapped_matrix is 65535x65535
since std::size_t compiles as unsigned int (UInt32).

I'm looking for a way of increasing this limit. The best way I can
think of would be to ensure that size_t uses a bigger (64-bit) type
rather than the current UInt32.

Can I force std::size_t to be defined as unsigned long? How/where?
I'm using VC 2005 (VC8) on Windows.

Thanks for your support.

Cheers,
Greg

[Victor Bazarov]

gr*************@gmail.com wrote:

I'm using Boost::uBLAS::mapped_matrix for working with sparse
matrices. At the moment, the maximum dimension of mapped_matrix is
65535x65535 since std::size_t compiles as unsigned int (UInt32).

I'm looking for a way of increasing this limit. The best way I can
think of would be to ensure that size_t uses a bigger (64-bit) type
rather than the current UInt32.

Can I force std::size_t to be defined as unsigned long?

Usually that's compiler-dependent. But what would be the point?
'unsigned long' is 32 bits on Windows.

How/where?
I'm using VC 2005 (VC8) on Windows.

You need to ask in 'microsoft.public.vc.language' or other relevant
newsgroup. My suspicion is that you need to go 64 bits.

V
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I do not respond to top-posted replies, please don't ask

[greg.ruthenbeck]

Can I use template arguments to force the use of std::map<double,
unsigned long?
gr*************@gmail.com wrote:

Hi,

I'm using Boost::uBLAS::mapped_matrix for working with sparse matrices.
At the moment, the maximum dimension of mapped_matrix is 65535x65535
since std::size_t compiles as unsigned int (UInt32).

I'm looking for a way of increasing this limit. The best way I can
think of would be to ensure that size_t uses a bigger (64-bit) type
rather than the current UInt32.

Can I force std::size_t to be defined as unsigned long? How/where?
I'm using VC 2005 (VC8) on Windows.

Thanks for your support.

Cheers,
Greg

[greg.ruthenbeck]

Victor Bazarov wrote:

Can I force std::size_t to be defined as unsigned long?

Usually that's compiler-dependent. But what would be the point?
'unsigned long' is 32 bits on Windows.

Sorry, I meant to say 'unsigned long long' which is equivalent to
__uint64

Victor Bazarov wrote:

How/where?
I'm using VC 2005 (VC8) on Windows.

You need to ask in 'microsoft.public.vc.language' or other relevant
newsgroup. My suspicion is that you need to go 64 bits.

Will try them. If anyone who sees this post who knows how to force
size_t to use __uint64 please post.

Greg

[greg.ruthenbeck]

Victor Bazarov wrote:

Can I force std::size_t to be defined as unsigned long?

Usually that's compiler-dependent. But what would be the point?
'unsigned long' is 32 bits on Windows.

Sorry, I meant to say 'unsigned long long' which is equivalent to
__uint64

Victor Bazarov wrote:

How/where?
I'm using VC 2005 (VC8) on Windows.

You need to ask in 'microsoft.public.vc.language' or other relevant
newsgroup. My suspicion is that you need to go 64 bits.

Will try them. If anyone who sees this post who knows how to force
size_t to use __uint64 please post.

Greg

[Victor Bazarov]

gr*************@gmail.com wrote:

Victor Bazarov wrote:

>>Can I force std::size_t to be defined as unsigned long?

Usually that's compiler-dependent. But what would be the point?
'unsigned long' is 32 bits on Windows.

Sorry, I meant to say 'unsigned long long' which is equivalent to
__uint64

There is no "unsigned long long" in C++.

Victor Bazarov wrote:

>>How/where?
I'm using VC 2005 (VC8) on Windows.

You need to ask in 'microsoft.public.vc.language' or other relevant
newsgroup. My suspicion is that you need to go 64 bits.

Will try them. If anyone who sees this post who knows how to force
size_t to use __uint64 please post.

Whatever 'size_t' is defined to is governed by the implementation,
not by the programmer. You need to go to the newsgroup that deals
with your implementation.

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask