Best structure for a "data buffer".

[Barzo]

Ok, the question for sure will be stupid and the answer should be
simply: "it depends" but, anyway, I want to ask.

I have some data readed from binary files (In my case are audio file)
and I have to store in a temp "buffer" the data readed with a function
like:

File->ReadFileChunk(T buffer_ptr*, const int items_to_read);

I'm thinking to use a structure like an std::vector<T> because I think
it is more simple to manage instead of a simple T buffer[] array;

But, is there a way to store a T* buffer into a vector (and the
opposite) in only-one "copy" operation?

Thanks for any suggestions.
Daniele.

 

[Victor Bazarov]

Ok, the question for sure will be stupid and the answer should be
simply: "it depends" but, anyway, I want to ask.

I have some data readed from binary files (In my case are audio file)
and I have to store in a temp "buffer" the data readed with a function
like:

File->ReadFileChunk(T buffer_ptr*, const int items_to_read);

I'm thinking to use a structure like an std::vector<T> because I think
it is more simple to manage instead of a simple T buffer[] array;

But, is there a way to store a T* buffer into a vector (and the
opposite) in only-one "copy" operation?

// given that 'buffer' is
T *buffer;
...
// and you know what the number of elements in it is
int items_read = ... ;

// then you can construct a vector of those like so
std::vector<T> my_vector(buffer, buffer + items_read);

V

 

[mzdude]

I have some data readed from binary files (In my case are audio file)
and I have to store in a temp "buffer" the data readed with a function
like:

File->ReadFileChunk(T buffer_ptr*, const int items_to_read);

I'm thinking to use a structure like an std::vector<T> because I think
it is more simple to manage instead of a simple T buffer[] array;

But, is there a way to store a T* buffer into a vector (and the
opposite) in only-one "copy" operation?

     // given that 'buffer' is
     T *buffer;
     ...
     // and you know what the number of elements in it is
     int items_read = ... ;

     // then you can construct a vector of those like so
     std::vector<T> my_vector(buffer, buffer + items_read);

Why not read directly into the vector?
std::vector<T> myVector(items_to_read); // Create space
File->ReadChunk( &myVector[0], items_to_read );

 

[Victor Bazarov]

I have some data readed from binary files (In my case are audio file)
and I have to store in a temp "buffer" the data readed with a function
like:
File->ReadFileChunk(T buffer_ptr*, const int items_to_read);
I'm thinking to use a structure like an std::vector<T> because I think
it is more simple to manage instead of a simple T buffer[] array;
But, is there a way to store a T* buffer into a vector (and the
opposite) in only-one "copy" operation?

// given that 'buffer' is
T *buffer;
...
// and you know what the number of elements in it is
int items_read = ... ;

// then you can construct a vector of those like so
std::vector<T> my_vector(buffer, buffer + items_read);

Why not read directly into the vector?
std::vector<T> myVector(items_to_read); // Create space
File->ReadChunk( &myVector[0], items_to_read );

That's fine too, if 'T' has a default c-tor.

V

 

[Barzo]

Why not read directly into the vector?
std::vector<T> myVector(items_to_read);  // Create space
File->ReadChunk( &myVector[0], items_to_read );

That's fine too, if 'T' has a default c-tor.

Thanks a lot.
This is exactly what I need.
I didn't thought that I could use a vector in this manner.

PS. Yes, T could be an int, short, float or double.

Daniele.