1 files changed, 29 insertions, 0 deletions
diff --git a/misc.c b/misc.c
index 151e26f..f5a3ada 100644
--- a/misc.c
+++ b/misc.c
@@ -1,3 +1,32 @@
+
+// Writes only the database core structure and the provided task if not null.
+// Returns success.
+bool store_database_partial(const database_st *db, const task_st *task, const char *path) {
+    return store_database(db, path);
+	assert(db != NULL);
+	assert(path != NULL);
+	
+	// Open file.
+	FILE *file = fopen(path, "r+b");
+	if (file == NULL) {
+		fprintf(stderr, "Failed to open file '%s' while partially storing database: %s.\n", path, strerror(errno));
+		return false;
+	}
+	
+	fseek(file, DB_FILE_SIGN_LENGTH, SEEK_SET);
+	fwrite(db, SIZEOF_DATABASE_ST, 1, file);
+	
+	if (task != NULL) {
+		assert(task >= db->tasks && task < &db->tasks[db->count]);
+		ptrdiff_t offset = task - db->tasks;
+		fseek(file, offset * SIZEOF_TASK_ST, SEEK_CUR);
+		fwrite(task, SIZEOF_TASK_ST, 1, file);
+	}
+	
+	fclose(file);
+	return true;
+}
+
 // Returns the number of characters in a string using UTF8 encoding.
 size_t length_utf8(char *string) {
 	size_t size = 0;