From eb9b4853c0502e483cd6c2b298f525be3e185f4d Mon Sep 17 00:00:00 2001
From: "S.J.R. van Schaik" <stephan@whiteboxsystems.nl>
Date: Mon, 12 Jun 2017 14:24:51 +0200
Subject: [PATCH] mufs: implement mufs_rmpath() to remove file system nodes

---
 source/fs/mufs/path.c | 35 +++++++++++++++++++++++++++++++++++
 source/fs/mufs/path.h |  1 +
 2 files changed, 36 insertions(+)

diff --git a/source/fs/mufs/path.c b/source/fs/mufs/path.c
index 274c4ce..1e784cb 100644
--- a/source/fs/mufs/path.c
+++ b/source/fs/mufs/path.c
@@ -67,6 +67,41 @@ int mufs_mkpath(struct mufs *fs, const char *path, unsigned type)
 	return -1;
 }
 
+int mufs_rmpath(struct mufs *fs, const char *path, unsigned type)
+{
+	struct flash_dev *dev = fs->dev;
+	char data[1 << dev->log2_block_size];
+	struct mufs_dentry *entry;
+	struct mufs_tree *tree;
+	char *s;
+	uint32_t va, offset, len;
+
+	if (!(s = mufs_abspath(path)))
+		return -1;
+
+	if (!(tree = resolve_path(fs, s, NULL))) {
+		free(s);
+		return -1;
+	}
+
+	offset = tree->va & ((UINT32_C(1) << dev->log2_block_size) - 1);
+	va = align(tree->va, dev->log2_block_size);
+
+	if (mufs_tree_read(tree, data, va, 1 << dev->log2_block_size) == 0)
+		return -1;
+
+	entry = (struct mufs_dentry *)(data + offset);
+	len = sizeof *entry + entry->path_len;
+
+	memmove(data + offset, data + offset + len,
+		(UINT32_C(1) << dev->log2_block_size) - offset - len);
+
+	if (mufs_tree_write(tree, data, va, 1 << dev->log2_block_size) == 0)
+		return -1;
+
+	return 0;
+}
+
 int mufs_stat(struct mufs *fs, const char *path, struct mufs_stat *stat)
 {
 	if (!resolve_path(fs, path, stat))
diff --git a/source/fs/mufs/path.h b/source/fs/mufs/path.h
index ea906e8..b6aeddb 100644
--- a/source/fs/mufs/path.h
+++ b/source/fs/mufs/path.h
@@ -1,3 +1,4 @@
 #pragma once
 
 int mufs_mkpath(struct mufs *fs, const char *path, unsigned type);
+int mufs_rmpath(struct mufs *fs, const char *path, unsigned type);