Re: Save a vector inside a structure.
In article <zYidnWBDBsW6zGnbnZ2dneKdnZydnZ2d@giganews.com>, Jensen
Somers <usenet@jsomers.be> wrote:
Hello,
Is it possible to save a vector inside a structure to a file?
Let's say I have the following piece of code:
struct SaveData
{
int first,
int last,
std::vector<int> order;
};
If I write the structure to a binary file and read it out again the data
which should be in the vector is totally corrupt (other variables are
fine).
think about it:) the vector order has order.size() elements in
contiguous memory so it is simply export the size and then the elements
of order. then reading in the size in a local variable allows order to
be resized() and then the contents read. Not quite a simple posix
read()/write() but if order has any size its almost as fast. further
if you use a streambuf it will be buffered this can be an advantage
inputing the first three ints of the serialized version
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