Writing structure in a unsigned char array

[nasir_sidd]

I want to write the 2 structures of the bmp file into a buffer of unsigned char.Infact i am trying to write the whole bitmap into a buffer of usigned char, including headers and data. Can any one tell me how it is possible?


I am trying to write the following structues in the memory allocated as "unsigned char Bitmap[IHeader.BiSizeImage];

////////////////////////Structure for the BMP file header/////////

struct BmpFileHeader
{
unsigned short BfType;
unsigned long BfSize;
unsigned short BfReserved1;
unsigned short BfReserved2;
unsigned long BfOffBits;

};



///////////////////////Structure for the BMP Image Header/////////

struct BmpImageHeader
{
unsigned long BiSize;
unsigned long BiWidth;
unsigned long BiHieght;
unsigned short BiPlanes;
unsigned short BiBitCount;
unsigned long BiCompression;
unsigned long BiSizeImage;
unsigned long BiXPixPerMeter;
unsigned long BiYPixPerMeter;
unsigned long BiColorUsed;
unsigned long BiColorImportant;
};

[Magos]

Why as an unsigned char buffer, and not as a structure buffer? Oh well, it's your decision .

typedef struct 
{
   unsigned short BfType; 
   unsigned long BfSize; 
   unsigned short BfReserved1; 
   unsigned short BfReserved2; 
   unsigned long BfOffBits; 
}BmpFileHeader;

typedef struct 
{
   unsigned long BiSize; 
   unsigned long BiWidth; 
   unsigned long BiHieght; 
   unsigned short BiPlanes; 
   unsigned short BiBitCount; 
   unsigned long BiCompression; 
   unsigned long BiSizeImage; 
   unsigned long BiXPixPerMeter; 
   unsigned long BiYPixPerMeter; 
   unsigned long BiColorUsed; 
   unsigned long BiColorImportant; 
}BmpImageHeader;

int main()
{
   unsigned char* FileBuffer;
   unsigned char* ImageBuffer;

   FileBuffer = new unsigned char[sizeof(BmpFileHeader)];
   if(FileBuffer == NULL)
   {
      return 0;
   }

   ImageBuffer = new unsigned char[sizeof(BmpImageHeader)];
   if(ImageBuffer == NULL)
   {
      delete[] FileBuffer;
      return 0;
   }

   ...

   delete[] FileBuffer;
   delete[] ImageBuffer;
   retun 0;
}