From 7fdbf8ada832de81629c68026379706493e0b892 Mon Sep 17 00:00:00 2001
From: Vlasta Vesely <vlastavesely@protonmail.ch>
Date: Sun, 29 Apr 2018 08:42:11 +0200
Subject: [PATCH] make syllable chain doubly-linked

---
 syllable.c | 2 ++
 syllable.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/syllable.c b/syllable.c
index a0f9ee6..6e968aa 100644
--- a/syllable.c
+++ b/syllable.c
@@ -13,6 +13,7 @@ struct syllable *syllable_alloc(const char *data)
 		return NULL;
 
 	ptr->data = strdup(data);
+	ptr->prev = NULL;
 	ptr->next = NULL;
 
 	return ptr;
@@ -28,6 +29,7 @@ struct syllable *syllable_append(struct syllable *tail, const char *data)
 	struct syllable *ptr;
 
 	ptr = syllable_alloc(data);
+	ptr->prev = tail;
 	tail->next = ptr;
 
 	return ptr;
diff --git a/syllable.h b/syllable.h
index 2ac75da..35c22b4 100644
--- a/syllable.h
+++ b/syllable.h
@@ -5,6 +5,7 @@
 
 struct syllable {
 	char *data;
+	struct syllable *prev;
 	struct syllable *next;
 };