X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fio%2Fkblock.c;h=117c3e9b48ef3b9b51b43f134778580c87ea2df6;hb=ed914dcd14bb340d61a8bc011ec0cd7a0312ed79;hp=0f8ac27454172c76bac159dac3048ff028bdf394;hpb=5fd323fa3c1ac486d973338e575b34e9948bfb69;p=bertos.git

diff --git a/bertos/io/kblock.c b/bertos/io/kblock.c
index 0f8ac274..117c3e9b 100644
--- a/bertos/io/kblock.c
+++ b/bertos/io/kblock.c
@@ -100,7 +100,6 @@ INLINE void kblock_setDirty(struct KBlock *b, bool dirty)
 }
 
 
-
 size_t kblock_read(struct KBlock *b, block_idx_t idx, void *buf, size_t offset, size_t size)
 {
 	ASSERT(b);
@@ -150,6 +149,23 @@ static bool kblock_loadPage(struct KBlock *b, block_idx_t idx)
 }
 
 
+int kblock_trim(struct KBlock *b, block_idx_t start, block_idx_t count)
+{
+	ASSERT(start + count <= b->blk_cnt);
+
+	if (kblock_buffered(b))
+	{
+		if (!kblock_loadPage(b, start))
+			return EOF;
+	}
+
+	b->priv.blk_start += start;
+	b->priv.curr_blk = 0; // adjust logical address
+	b->blk_cnt = count;
+	return 0;
+}
+
+
 size_t kblock_write(struct KBlock *b, block_idx_t idx, const void *buf, size_t offset, size_t size)
 {
 	ASSERT(b);