move iDataSource to own header file,

change read function for easier thread locking (seek must called with a offset/position every time)

1 files changed, 7 insertions, 36 deletions

diff --git a/lib/base/rawfile.h b/lib/base/rawfile.h
index bb39dc6e..1720d581 100644
--- a/lib/base/rawfile.h
+++ b/lib/base/rawfile.h
@@ -2,37 +2,7 @@
 #define __lib_base_rawfile_h
 
 #include <string>
-#include <lib/base/object.h>
-
-class iDataSource: public iObject
-{
-public:
-	virtual off_t lseek(off_t offset, int whence)=0;
-	virtual ssize_t read(void *buf, size_t count)=0; /* NOTE: you must be able to handle short reads! */
-	virtual off_t length()=0;
-	virtual off_t position()=0;
-	virtual int valid()=0;
-	virtual eSingleLock &getLock()=0;
-	virtual bool is_shared()=0;
-};
-
-class iDataSourcePositionRestorer
-{
-	ePtr<iDataSource> &m_source;
-	off_t m_position;
-public:
-	iDataSourcePositionRestorer(ePtr<iDataSource> &source)
-		:m_source(source)
-	{
-		if (m_source->is_shared())
-			m_position = m_source->position();
-	}
-	~iDataSourcePositionRestorer()
-	{
-		if (m_source->is_shared())
-			m_source->lseek(m_position, SEEK_SET);
-	}
-};
+#include <lib/base/idatasource.h>
 
 class eRawFile: public iDataSource
 {
@@ -43,14 +13,13 @@ public:
 	~eRawFile();
 	int open(const char *filename, int cached = 0);
 	void setfd(int fd);
-	off_t lseek(off_t offset, int whence);
 	int close();
-	ssize_t read(void *buf, size_t count); /* NOTE: you must be able to handle short reads! */
+
+	// iDataSource
+	off_t lseek(off_t offset, int whence);
+	ssize_t read(off_t offset, void *buf, size_t count);
 	off_t length();
-	off_t position();
 	int valid();
-	eSingleLock &getLock();
-	bool is_shared() { return ref.count > 1; }
 private:
 	int m_fd;     /* for uncached */
 	FILE *m_file; /* for cached */
@@ -61,6 +30,8 @@ private:
 	void scan();
 	int m_current_file;
 	int switchOffset(off_t off);
+
+	off_t lseek_internal(off_t offset, int whence);
 	FILE *openFileCached(int nr);
 	int openFileUncached(int nr);
 };