From: asterix <asterix@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Thu, 29 Nov 2007 15:22:59 +0000 (+0000)
Subject: Add a generic implentation o seek function. Add test prototype.
X-Git-Tag: 1.0.0~228
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=9440bf5d1e06bbbecd17da05a2be5705e3503a47;p=bertos.git

Add a generic implentation o seek function. Add test prototype.


git-svn-id: https://src.develer.com/svnoss/bertos/trunk@1014 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/kern/kfile.c b/kern/kfile.c
index b9934e79..38f43802 100644
--- a/kern/kfile.c
+++ b/kern/kfile.c
@@ -42,6 +42,50 @@
 
 #include <kfile.h>
 
+#inclede <appconfig.h>
+
+
+/**
+ * Move \a fd file seek position of \a offset bytes
+ * from current position.
+ * This is a generic implementation of seek function, you should redefine
+ * it in your local module.
+ */
+int32_t kfile_seek(struct _KFile *fd, kfile_off_t offset, KSeekMode whence)
+{
+	uint32_t seek_pos;
+
+	switch(whence)
+	{
+
+	case KSM_SEEK_SET:
+		seek_pos = 0;
+		break;
+	case KSM_SEEK_END:
+		seek_pos = fd->size - 1;
+		break;
+	case KSM_SEEK_CUR:
+		seek_pos = fd->seek_pos;
+		break;
+	default:
+		ASSERT(0);
+		return -1;
+		break;
+
+	}
+
+	/* Bound check */
+	if (seek_pos + offset > fd->size)
+	{
+		ASSERT(0);
+		return -1;
+	}
+
+	fd->seek_pos = seek_pos + offset;
+	kprintf("Flash seek to [%lu]\n", fd->seek_pos);
+
+	return fd->seek_pos;
+}
 
 #if CONFIG_TEST
 
diff --git a/kern/kfile.h b/kern/kfile.h
index e9d4a5c8..d59f7fb9 100644
--- a/kern/kfile.h
+++ b/kern/kfile.h
@@ -83,4 +83,15 @@ typedef struct _KFile
 	uint32_t		size;
 } KFile;
 
+
+/*
+ * Generic implementation of seek function.
+ */
+int32_t kfile_seek(struct _KFile *fd, kfile_off_t offset, KSeekMode whence);
+
+/*
+ * Kfile test function
+ */
+bool kfile_test(uint8_t *buf, size_t _size , uint8_t *save_buf, size_t * save_buf_size);
+
 #endif /* MWARE_KFILE_H */