When I try to run the program, I get the message "file size limit exceeded." After looking over my code many times, I can't figure out what might be going wrong??
/**
* copy.c
*
* Computer Science 50
* Problem Set 4
*
* Copies a BMP piece by piece, just because.
*/
#include <stdio.h>
#include <stdlib.h>
#include "bmp.h"
int main(int argc, char* argv[])
{
// ensure proper usage
if(argc != 4)
{
printf("Usage: ./resize n infile outfile\n");
return 1;
}
//store arg[0] as int n
int n = atoi(argv[1]);
// remember filenames
char* infile = argv[2];
char* outfile = argv[3];
// open input file
FILE* inptr = fopen(infile, "r");
if (inptr == NULL)
{
printf("Could not open %s.\n", infile);
return 2;
}
// open output file
FILE* outptr = fopen(outfile, "w");
if (outptr == NULL)
{
fclose(inptr);
fprintf(stderr, "Could not create %s.\n", outfile);
return 3;
}
// read infile's BITMAPFILEHEADER
BITMAPFILEHEADER bf;
fread(&bf, sizeof(BITMAPFILEHEADER), 1, inptr);
// read infile's BITMAPINFOHEADER
BITMAPINFOHEADER bi;
fread(&bi, sizeof(BITMAPINFOHEADER), 1, inptr);
// ensure infile is (likely) a 24-bit uncompressed BMP 4.0
if (bf.bfType != 0x4d42 || bf.bfOffBits != 54 || bi.biSize != 40 ||
bi.biBitCount != 24 || bi.biCompression != 0)
{
fclose(outptr);
fclose(inptr);
fprintf(stderr, "Unsupported file format.\n");
return 4;
}
//Keep track of original header info to be updated
//uint16_t original_bfSize = bf.bfSize;
// uint32_t original_biSize = bi.biSize;
LONG original_biWidth = bi.biWidth;
LONG original_biHeight = bi.biHeight;
//update header info
bi.biWidth = n * bi.biWidth;
bi.biHeight = n * bi.biHeight;
// determine padding for scanlines
int padding = (4 - (bi.biWidth * sizeof(RGBTRIPLE)) % 4) % 4;
// rest of header info
bi.biSize = (bi.biWidth * sizeof(RGBTRIPLE) + padding) * bi.biHeight;
bf.bfSize = sizeof(bf) + bi.biSize;
// write outfile's BITMAPFILEHEADER
fwrite(&bf, sizeof(BITMAPFILEHEADER), 1, outptr);
// write outfile's BITMAPINFOHEADER
fwrite(&bi, sizeof(BITMAPINFOHEADER), 1, outptr);
// iterate over infile's scanlines
for (int i = 0, O_biHeight = abs(original_biHeight); i < O_biHeight; i++)
{
for(int m = 0; m < n; m++)
{
// iterate over pixels in scanline
for (int j = 0; j < original_biWidth; j++)
{
// temporary storage
RGBTRIPLE triple;
// read RGB triple from infile
fread(&triple, sizeof(RGBTRIPLE), 1, inptr);
// replicate pixel n times to outfile
for(int l = 0; l < n; i++)
{
fwrite(&triple, sizeof(RGBTRIPLE), 1, outptr);
}
}
// skip over padding, if any
fseek(inptr, padding, SEEK_CUR);
// then add it back (to demonstrate how)
for (int k = 0; k < padding; k++)
{
fputc(0x00, outptr);
}
}
}
// close infile
fclose(inptr);
// close outfile
fclose(outptr);
// that's all folks
return 0;
}