X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fio%2Fkblock.c;h=117c3e9b48ef3b9b51b43f134778580c87ea2df6;hb=1997bcac9db9a289afa5ca6d4fea4b75aef329d6;hp=69b5b159eba3ce711e0ccfd89a1067c059c39207;hpb=09befbcd1ee296ad30790e303adec8dc1a104f07;p=bertos.git

diff --git a/bertos/io/kblock.c b/bertos/io/kblock.c
index 69b5b159..117c3e9b 100644
--- a/bertos/io/kblock.c
+++ b/bertos/io/kblock.c
@@ -26,7 +26,7 @@
  * invalidate any other reasons why the executable file might be covered by
  * the GNU General Public License.
  *
- * Copyright 2009 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
  *
  * -->
  *
@@ -38,8 +38,8 @@
 
 #include "kblock.h"
 
-#define LOG_LEVEL LOG_LVL_ERR
-#define LOG_FORMAT LOG_FMT_VERBOSE
+#define LOG_LEVEL   LOG_LVL_ERR
+#define LOG_FORMAT  LOG_FMT_VERBOSE
 
 #include <cfg/log.h>
 #include <string.h>
@@ -78,7 +78,7 @@ INLINE int kblock_load(struct KBlock *b, block_idx_t index)
 	KB_ASSERT_METHOD(b, load);
 	ASSERT(index < b->blk_cnt);
 
-	LOG_INFO("index %d\n", index);
+	LOG_INFO("index %ld\n", index);
 	return b->priv.vt->load(b, b->priv.blk_start + index);
 }
 
@@ -87,7 +87,7 @@ INLINE int kblock_store(struct KBlock *b, block_idx_t index)
 	KB_ASSERT_METHOD(b, store);
 	ASSERT(index < b->blk_cnt);
 
-	LOG_INFO("index %d\n", index);
+	LOG_INFO("index %ld\n", index);
 	return b->priv.vt->store(b, b->priv.blk_start + index);
 }
 
@@ -100,13 +100,12 @@ 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);
 	ASSERT(buf);
 	ASSERT(offset + size <= b->blk_size);
-	LOG_INFO("blk_idx %d, offset %d, size %d\n", idx, offset, size);
+	LOG_INFO("blk_idx %ld, offset %u, size %u\n", idx, offset, size);
 
 	if (kblock_buffered(b) && idx == b->priv.curr_blk)
 		return kblock_readBuf(b, buf, offset, size);
@@ -124,7 +123,7 @@ int kblock_flush(struct KBlock *b)
 
 	if (kblock_cacheDirty(b))
 	{
-		LOG_INFO("flushing block %d\n", b->priv.curr_blk);
+		LOG_INFO("flushing block %ld\n", b->priv.curr_blk);
 		if (kblock_store(b, b->priv.curr_blk) == 0)
 			kblock_setDirty(b, false);
 		else
@@ -140,7 +139,7 @@ static bool kblock_loadPage(struct KBlock *b, block_idx_t idx)
 
 	if (idx != b->priv.curr_blk)
 	{
-		LOG_INFO("loading block %d\n", idx);
+		LOG_INFO("loading block %ld\n", idx);
 		if (kblock_flush(b) != 0 || kblock_load(b, idx) != 0)
 				return false;
 
@@ -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);
@@ -157,7 +173,7 @@ size_t kblock_write(struct KBlock *b, block_idx_t idx, const void *buf, size_t o
 	ASSERT(idx < b->blk_cnt);
 	ASSERT(offset + size <= b->blk_size);
 
-	LOG_INFO("blk_idx %d, offset %d, size %d\n", idx, offset, size);
+	LOG_INFO("blk_idx %ld, offset %u, size %u\n", idx, offset, size);
 
 	if (kblock_buffered(b))
 	{
@@ -220,12 +236,26 @@ int kblock_copy(struct KBlock *b, block_idx_t src, block_idx_t dest)
 
 int kblock_swLoad(struct KBlock *b, block_idx_t index)
 {
-	return (kblock_readDirect(b, index, b->priv.buf, 0, b->blk_size) == b->blk_size) ? 0 : EOF;
+	/*
+	 * Since this is a low level API, the index here is a fisical index.
+	 * If we call another low level API, logical to fisical translation
+	 * would be applied twice.
+	 * In order to avoid this we subtract the start block index.
+	 */
+	ASSERT(index >= b->priv.blk_start);
+	return (kblock_readDirect(b, index - b->priv.blk_start, b->priv.buf, 0, b->blk_size) == b->blk_size) ? 0 : EOF;
 }
 
 int kblock_swStore(struct KBlock *b, block_idx_t index)
 {
-	return (kblock_writeDirect(b, index, b->priv.buf, 0, b->blk_size) == b->blk_size) ? 0 : EOF;
+	/*
+	 * Since this is a low level API, the index here is a fisical index.
+	 * If we call another low level API, logical to fisical translation
+	 * would be applied twice.
+	 * In order to avoid this we subtract the start block index.
+	 */
+	ASSERT(index >= b->priv.blk_start);
+	return (kblock_writeDirect(b, index - b->priv.blk_start, b->priv.buf, 0, b->blk_size) == b->blk_size) ? 0 : EOF;
 }
 
 size_t kblock_swReadBuf(struct KBlock *b, void *buf, size_t offset, size_t size)
@@ -244,3 +274,8 @@ size_t kblock_swWriteBuf(struct KBlock *b, const void *buf, size_t offset, size_
 	memcpy((uint8_t *)b->priv.buf + offset, buf, size);
 	return size;
 }
+
+int kblock_swClose(UNUSED_ARG(struct KBlock, *b))
+{
+	return 0;
+}