/*



Compile:



Windows:

mingw32-gcc.exe -o pad.exe pad.c -static



linux:

gcc -o pad tools/linux/src/pad.c -static



macsox:

gcc -o tools/macos/pad tools/macos/src/pad.c



*/



#include <stdio.h>

#include <stdlib.h>



int main(int argc, char* argv[])

{

	unsigned int ret;



	if (argc != 3) {

		printf("pad.exe: fatal error\n");

		printf("Usage: pad.exe <file> <align_size>\n");

		return -1;

	}



	unsigned int align_size = strtoul(argv[2], NULL, 0);



	FILE *ifp1 = fopen(argv[1], "rb+"); //Open a binary file for both reading and writing. (The file must exist.)

	if (ifp1 == NULL) {

		printf("pad.exe: Open file error\n");

		return -1;

	}



	unsigned int img_len, pad_size;

	unsigned char pad_c = 0xFF;



	ret = fseek(ifp1, 0, SEEK_END);

	if (ret != 0) {

		printf("fseek error:%d\n", ret);

		goto exit;

	}



	img_len = ftell(ifp1);

	pad_size = ((((img_len - 1) / align_size) + 1) * align_size) - img_len;



	printf("pad.exe, img_len: %x, pad_len: %x\n", img_len, pad_size);



	while (pad_size-- != 0) {

		fwrite(&pad_c, 1, 1, ifp1);

	}



exit:

	fclose(ifp1);

	return 0;

}