Rewriting....

1 files changed, 38 insertions, 0 deletions

diff --git a/src/server/image.c b/src/server/image.c
new file mode 100644
index 0000000..8a2b943
--- /dev/null
+++ b/src/server/image.c
@@ -0,0 +1,38 @@
+#include "image.h"
+
+#include <glib/gmacros.h>
+#include <assert.h>
+
+int image_is_complete(dnbd3_image_t *image)
+{
+	assert(image != NULL);
+	if (image->working && image->cache_map == NULL) {
+		return TRUE;
+	}
+	if (image->filesize == 0 || !image->working) {
+		return FALSE;
+	}
+   int complete = TRUE, j;
+   const int map_len_bytes = IMGSIZE_TO_MAPBYTES(image->filesize);
+   for (j = 0; j < map_len_bytes - 1; ++j)
+   {
+           if (image->cache_map[j] != 0xFF)
+           {
+                   complete = FALSE;
+                   break;
+           }
+   }
+   if (complete) // Every block except the last one is complete
+   { // Last one might need extra treatment if it's not a full byte
+           const int blocks_in_last_byte = (image->filesize >> 12) & 7;
+           uint8_t last_byte = 0;
+           if (blocks_in_last_byte == 0) {
+                   last_byte = 0xFF;
+           } else {
+                   for (j = 0; j < blocks_in_last_byte; ++j)
+                           last_byte |= (1 << j);
+           }
+           complete = ((image->cache_map[map_len_bytes - 1] & last_byte) == last_byte);
+   }
+   return complete;
+}