Using std::ifstream to load in an array of struct data type into a std::vector
- by Sent1nel
I am working on a bitmap loader in C++ and when moving from the C style array to the std::vector I have run into an usual problem of which Google does not seem to have the answer.
8 Bit and 4 bit, bitmaps contain a colour palette. The colour palette has blue, green, red and reserved components each 1 byte in size.
// Colour palette
struct BGRQuad
{
UInt8 blue;
UInt8 green;
UInt8 red;
UInt8 reserved;
};
The problem I am having is when I create a vector of the BGRQuad structure I can no longer use the ifstream read function to load data from the file directly into the BGRQuad vector.
// This code throws an assert failure!
std::vecotr quads;
if (coloursUsed) // colour table available
{ // read in the colours
quads.reserve(coloursUsed);
inFile.read( reinterpret_cast(&quads[0]), coloursUsed * sizeof(BGRQuad) );
}
Does anyone know how to read directly into the vector without having to create a C array and copy data into the BGRQuad vector?
