core: Track current offset

Signed-off-by: Ian Moffett <ian@mirocom.org>

src/main.c

@@ -1,6 +1,8 @@
 #define _DEFAULT_SOURCE
+#include <sys/stat.h>
 #include <stdio.h>
 #include <stdint.h>
+#include <stddef.h>
 #include <errno.h>
 #include <unistd.h>
 #include <dirent.h>
@@ -20,12 +22,14 @@ static const char *output_name = "out.cav";
  * @dir: Opened directory
  * @pass_count: Number of passes made in file
  * @file_count: Number of files encountered including subdirectories
+ * @cur_off: Current offset tracker
  */
 struct cav_state {
     int dir_fd;
     DIR *dir;
     uint8_t pass_count;
     size_t file_count;
+    uint32_t cur_off;
 };
 
 static void
@@ -53,6 +57,30 @@ version(void)
     );
 }
 
+/*
+ * Obtain file size from path
+ *
+ * @path: Path of file to obtain size from
+ *
+ * Returns number of bytes in file
+ */
+static size_t
+get_file_size(const char *path)
+{
+    struct stat sb;
+
+    if (path == NULL) {
+        return 0;
+    }
+
+    if (stat(path, &sb) < 0) {
+        perror("stat");
+        return 0;
+    }
+
+    return sb.st_size;
+}
+
 /*
  * Initialize the cav state machine
  *
@@ -133,7 +161,9 @@ consume_scan(const char *dir_path, struct cav_state *state, DIR *subdir)
             closedir(subdir);
             break;
         default:
+            snprintf(buf, sizeof(buf), "%s/%s", dir_path, dirent->d_name);
             ++state->file_count;
+            state->cur_off += get_file_size(buf);
             break;
         }
     }
@@ -155,7 +185,11 @@ consume_pass(struct cav_state *state)
     case 0:
         /* Scan pass */
         consume_scan(input_name, state, NULL);
-        printf("[pass 0] scanned %zu files\n", state->file_count);
+        printf(
+            "[pass 0] scanned %zu files [%d bytes]\n",
+            state->file_count,
+            state->cur_off
+        );
         break;
     }
 }