X-Git-Url: https://git.cweiske.de/enigma2.git/blobdiff_plain/08ee4eef0af570f64937fd7a20c5d71dfb89cabc..1a2a0e2f94f8f9ba64b1e2d11b42bec88ed612d0:/lib/base/rawfile.cpp

diff --git a/lib/base/rawfile.cpp b/lib/base/rawfile.cpp
index 0d8a93b5..3a09e07e 100644
--- a/lib/base/rawfile.cpp
+++ b/lib/base/rawfile.cpp
@@ -1,9 +1,13 @@
+#include <cstdio>
 #include <unistd.h>
 #include <fcntl.h>
 #include <lib/base/rawfile.h>
 #include <lib/base/eerror.h>
 
+DEFINE_REF(eRawFile);
+
 eRawFile::eRawFile()
+	:m_lock(false)
 {
 	m_fd = -1;
 	m_file = 0;
@@ -51,6 +55,13 @@ void eRawFile::setfd(int fd)
 }
 
 off_t eRawFile::lseek(off_t offset, int whence)
+{
+	eSingleLocker l(m_lock);
+	m_current_offset = lseek_internal(offset, whence);
+	return m_current_offset;
+}
+
+off_t eRawFile::lseek_internal(off_t offset, int whence)
 {
 //	eDebug("lseek: %lld, %d", offset, whence);
 		/* if there is only one file, use the native lseek - the file could be growing! */
@@ -60,7 +71,8 @@ off_t eRawFile::lseek(off_t offset, int whence)
 			return ::lseek(m_fd, offset, whence);
 		else
 		{
-			::fseeko(m_file, offset, whence);
+			if (::fseeko(m_file, offset, whence) < 0)
+				perror("fseeko");
 			return ::ftello(m_file);
 		}
 	}
@@ -99,11 +111,19 @@ int eRawFile::close()
 	}
 }
 
-ssize_t eRawFile::read(void *buf, size_t count)
+ssize_t eRawFile::read(off_t offset, void *buf, size_t count)
 {
-//	eDebug("read: %p, %d", buf, count);
+	eSingleLocker l(m_lock);
+
+	if (offset != m_current_offset)
+	{
+		m_current_offset = lseek_internal(offset, SEEK_SET);
+		if (m_current_offset < 0)
+			return m_current_offset;
+	}
+
 	switchOffset(m_current_offset);
-	
+
 	if (m_nrfiles >= 2)
 	{
 		if (m_current_offset + count > m_totallength)
@@ -140,7 +160,7 @@ void eRawFile::scan()
 	{
 		if (!m_cached)
 		{
-			int f = openFile(m_nrfiles);
+			int f = openFileUncached(m_nrfiles);
 			if (f < 0)
 				break;
 			if (!m_nrfiles)
@@ -149,7 +169,7 @@ void eRawFile::scan()
 			::close(f);
 		} else
 		{
-			FILE *f = (FILE*)openFile(m_nrfiles);
+			FILE *f = openFileCached(m_nrfiles);
 			if (!f)
 				break;
 			::fseeko(f, 0, SEEK_END);
@@ -176,9 +196,9 @@ int eRawFile::switchOffset(off_t off)
 //			eDebug("-> %d", filenr);
 			close();
 			if (!m_cached)
-				m_fd = openFile(filenr);
+				m_fd = openFileUncached(filenr);
 			else
-				m_file = (FILE*)openFile(filenr);
+				m_file = openFileCached(filenr);
 			m_last_offset = m_base_offset = m_splitsize * filenr;
 			m_current_file = filenr;
 		}
@@ -201,7 +221,8 @@ int eRawFile::switchOffset(off_t off)
 	}
 }
 
-int eRawFile::openFile(int nr)
+/* m_cached */
+FILE *eRawFile::openFileCached(int nr)
 {
 	std::string filename = m_basename;
 	if (nr)
@@ -210,8 +231,23 @@ int eRawFile::openFile(int nr)
 		snprintf(suffix, 5, ".%03d", nr);
 		filename += suffix;
 	}
-	if (!m_cached)
-		return ::open(filename.c_str(), O_RDONLY | O_LARGEFILE);
-	else
-		return (int)::fopen64(filename.c_str(), "rb");
+	return ::fopen64(filename.c_str(), "rb");
+}
+
+/* !m_cached */
+int eRawFile::openFileUncached(int nr)
+{
+	std::string filename = m_basename;
+	if (nr)
+	{
+		char suffix[5];
+		snprintf(suffix, 5, ".%03d", nr);
+		filename += suffix;
+	}
+	return ::open(filename.c_str(), O_RDONLY | O_LARGEFILE);
+}
+
+off_t eRawFile::length()
+{
+	return m_totallength;
 }