checkpoint

1 files changed, 63 insertions, 0 deletions

diff --git a/archived/less_old_sim8086/code/print_binary.c b/archived/less_old_sim8086/code/print_binary.c
new file mode 100644
index 0000000..1382cae
--- /dev/null
+++ b/archived/less_old_sim8086/code/print_binary.c
@@ -0,0 +1,63 @@
+#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;
+}