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#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <signal.h>
#define Assert(Expr) \
if (!(Expr)) \
{ \
raise(SIGTRAP); \
}
int
main(int ArgC, char *Args[])
{
if (ArgC < 2)
{
fprintf(stderr, "Missing argument.\n");
fprintf(stderr, "Usage: %s <filename>\n", Args[0]);
}
else
{
struct stat StatBuffer = {0};
char *Filename = 0;
int FD = -1;
int Err = -1;
size_t Filesize = 0;
char *Buffer = 0;
Filename = Args[1];
FD = open(Filename, O_RDONLY);
Assert(FD != -1);
Err = stat(Filename, &StatBuffer);
Assert(Err != -1);
Filesize = StatBuffer.st_size;
if (Filesize)
{
Buffer = mmap(0, Filesize, PROT_READ, MAP_SHARED, FD, 0);
Assert(Buffer);
for (size_t At = 0; At < Filesize; At++)
{
unsigned char Byte = Buffer[At];
int Count = 8;
while (Count--)
{
printf("%d", Byte >> 7);
Byte <<= 1;
}
printf(" ");
}
printf("\n");
}
else
{
fprintf(stderr, "Empty file.\n");
}
}
return 0;
}
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