1 files changed, 68 insertions, 0 deletions
diff --git a/c_implementation/src/ak_fs_mt.c b/c_implementation/src/ak_fs_mt.c
new file mode 100644
index 0000000..7bdd6f4
--- /dev/null
+++ b/c_implementation/src/ak_fs_mt.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+#include <libakfs.h>
+#include <stdlib.h>
+
+bool ak_fs_mt_branch_is_null(mt_branch* node)
+{
+    if (
+            ak_fs_sha512sum_is_null(&node->root) &&
+            ak_fs_sha512sum_is_null(&node->head) &&
+            ak_fs_sha512sum_is_null(&node->tail)
+       )
+    {
+        return true;
+    }
+    return false;
+}
+
+bool ak_fs_mt_branch_compare(mt_branch *a, mt_branch *b)
+{
+    if (
+            ak_fs_sha512sum_compare(&a->root, &b->root) &&
+            ak_fs_sha512sum_compare(&a->head, &b->head) &&
+            ak_fs_sha512sum_compare(&a->tail, &b->tail)
+       )
+    {
+        return true;
+    }
+    return false;
+}
+
+int ak_fs_mt_branch_resolve(mt_branch *node)
+{
+    const char* leafs_dir = getenv("AK_LEAFSDIR");
+    FILE *fd;
+    char *fullpath;
+    asprintf(&fullpath, "%s/%s", leafs_dir, ak_fs_sha512sum_struct_read_as_string(&node->head));
+    fd = fopen(fullpath, "r");
+    if ( fd == NULL )
+    {
+        perror("fopen");
+        return 1;
+    }
+    char buffer[258];
+    fread(&buffer, sizeof(buffer), 1, fd);
+    fclose(fd);
+    char h1[129] = {0};
+    char h2[129] = {0};
+    if ( buffer[128] == '\n' && buffer[257] == '\n' ) printf("\\n found on the expected spot!\n");
+    mt_branch h0;
+    ak_fs_sha512sum_init(&h0.root);
+    ak_fs_sha512sum_init(&h0.head);
+    ak_fs_sha512sum_init(&h0.tail);
+    h0.root = node->root;
+    for( size_t i = 0; i < 128; ++i )
+    {
+        h1[i] = buffer[i];
+    }
+    h1[128] = '\0';
+    for( size_t i = 0; i < 128; ++i )
+    {
+        h2[i] = buffer[i+129];
+    }
+    h2[128] = '\0';
+    ak_fs_sha512sum_string_to_struct(h1, &h0.head);
+    ak_fs_sha512sum_string_to_struct(h2, &h0.tail);
+    ak_fs_mt_branch_resolve(&h0);
+    return 0;
+}