Trouble reading .bmp header file properly - c

Question

I am trying to take in a .bmp file and eventually edit the pixels one by one but I am coming up with a problem with the width and height returned to me in the INFOHEADER struct. The width returned is 13107200 and the height is 65536. However, whenever I run through the program a total of only 60003 total pixels are counted. I have no idea why this is. Any help would be greatly appreciated.
#include <stdio.h>
#include <stdlib.h>
int main( int argc, char *argv[] ){
//define structures
typedef struct
{ unsigned short int Type; /* Magic identifier */
unsigned int Size; /* File size in bytes */
unsigned short int Reserved1, Reserved2;
unsigned int Offset; /* Offset to data (in B)*/
}HEADER; /* -- 14 Bytes -- */
typedef struct
{ unsigned int Size; /* Header size in bytes */
int Width, Height; /* Width / Height of image */
unsigned short int Planes; /* Number of colour planes */
unsigned short int Bits; /* Bits per pixel */
unsigned int Compression; /* Compression type */
unsigned int ImageSize; /* Image size in bytes */
int xResolution, yResolution;/* Pixels per meter */
unsigned int Colors; /* Number of colors */
unsigned int ImportantColors;/* Important colors */
}INFOHEADER; /* -- 40 Bytes -- */
typedef struct
{ unsigned char Red, Green, Blue;
}PIXEL;
//make instance of all three structures
HEADER data;
INFOHEADER data2;
PIXEL pixel;
//declare file read pointer
FILE *file;
//declare fileout read pointer
//FILE *fileout; //declare file printed file pointer
// open file 1 of argument counter and return 0 apon error
if( !(file = fopen( "CU.bmp","rb")))return 0;
//read HEADER data into data
fread(&data,sizeof(HEADER),1,file);
//read IB+NFOHEADER data into data2
fread(&data2,sizeof(INFOHEADER),1,file);
//Print PIXEL data
//Allocate space for pixelarray
PIXEL **pixelarray;
int r=0,c=0,rows=data2.Height,collumns=data2.Width;
pixelarray= malloc(rows*sizeof(PIXEL *));
for(r=0; r<rows; r++){
pixelarray[r]=malloc(collumns*sizeof(PIXEL));
}
//fill pixel array with pixel structs
r=0;c=0;
int pixelnum=1;
while( fread(&pixel,sizeof(PIXEL),1,file) ){
if(c == collumns){
c=0;
r++;
}
pixelarray[r][c] = pixel;
printf("\nPixel %10d: %02X%02X%02X",pixelnum,pixelarray[r][c].Red,pixelarray[r][c].Blue,pixelarray[r][c].Green);
fflush(stdout);
c++;pixelnum++;
}
free(pixelarray);
fclose(file); //close the files prior to exiting

Answer 1

I guess your problem is structure alignment. You can refer to it here and here. To eliminate it use the #pragma directive. So your structure declaration would be something like this:
#pragma pack(push) // push current alignment to stack
#pragma pack(1) // set alignment to 1 byte boundary
typedef struct
{
unsigned short int Type; /* Magic identifier */
unsigned int Size; /* File size in bytes */
unsigned short int Reserved1;
unsigned short int Reserved2;
unsigned int Offset; /* Offset to data (in B)*/
}HEADER; /* -- 14 Bytes -- */
typedef struct
{
unsigned int Size; /* Header size in bytes */
int Width;
int Height; /* Width / Height of image */
unsigned short int Planes; /* Number of colour planes */
unsigned short int Bits; /* Bits per pixel */
unsigned int Compression; /* Compression type */
unsigned int ImageSize; /* Image size in bytes */
int xResolution;
int yResolution;/* Pixels per meter */
unsigned int Colors; /* Number of colors */
unsigned int ImportantColors;/* Important colors */
}INFOHEADER; /* -- 40 Bytes -- */
typedef struct
{
unsigned char Red;
unsigned char Green;
unsigned char Blue;
}PIXEL;
#pragma pack(pop) // restore original alignment from stack
This correctly reads the width and height of BMP image. Further while reading image data, do it directly:
for( r=0; r<rows; r++ )
{
for( c=0; c<collumns; c++ ) // read pixel data from image
{
fread(&pixelarray[r][c] , 1, sizeof(PIXEL), file);
pixelnum++;
}
}

Answer 2

You must use 16 bit variable (unsigned short) instead of int for width and height. According to Wikipedia, width/height is 16 bit.

Answer 3

Open the bmp file in a hex editor and see what value is present in the info header.
Then debug you code and check what value you read in the infoheader.