first commit! 🎉

axd.c

@@ -0,0 +1,62 @@
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[]) {
+    if (argc != 2) {
+        printf("Usage: %s <file>\n", argv[0]);
+        return 1;
+    }
+
+    FILE *file = fopen(argv[1], "r");
+
+    if (file == NULL) {
+        fprintf(stderr, "Failed to open file: %s\n", strerror(errno));
+        return 1;
+    }
+
+    fseek(file, 0, SEEK_END);
+    size_t filesize = ftell(file);
+    fseek(file, 0, 0);
+
+    char buffer[filesize + 1];
+    fread(buffer, 1, filesize, file);
+    buffer[filesize] = '\0';
+
+    static int width = 0x10;
+    size_t offset = 0;
+    while (offset < filesize) {
+        printf("%08lx: ", offset);
+
+        // print hex chars
+        for (int c = 0; c < 0x10; c++) {
+            if (offset + c >= filesize)
+                printf("  ");
+            else {
+                if ((buffer[offset + c] & 0xff) < 0x10)
+                    printf("0");
+                printf("%x", buffer[offset + c] & 0xff);
+            }
+            
+            if (c % 2 != 0)
+                printf(" ");
+        }
+
+        printf(" ");
+
+        // print ASCII chars
+        for (int o = 0; o < 0x10 && offset + o < filesize; o++) {
+            char c = buffer[offset + o];
+            if (c > 31)
+                printf("%c", c);
+            else
+                printf(".");
+        }
+
+        printf("\n");
+        offset += 0x10;
+    }
+
+    return 0;
+}