Added sharedFile library

engine/shared/library/sharedFile/src/linux/OsFile.cpp

@@ -0,0 +1,123 @@
+// ======================================================================
+//
+// OsFile.cpp
+// Copyright 2002, Sony Online Entertainment Inc.
+// All Rights Reserved.
+//
+// ======================================================================
+
+#include "sharedFile/FirstSharedFile.h"
+#include "sharedFile/OsFile.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+// ======================================================================
+
+void OsFile::install()
+{
+}
+
+// ----------------------------------------------------------------------
+
+bool OsFile::exists(const char *fileName)
+{
+	struct stat statBuffer;
+	if (stat(fileName, &statBuffer) != 0)
+		return false;
+
+	if (S_ISDIR(statBuffer.st_mode))
+		return false;
+
+	return true;
+}
+
+// ----------------------------------------------------------------------
+
+int OsFile::getFileSize(const char *fileName)
+{
+	struct stat statBuffer;
+	int fileSize = 0;
+
+	if (stat(fileName, &statBuffer) == 0)
+	{
+		fileSize = static_cast<int>(statBuffer.st_size);
+	}
+	return fileSize;
+}
+
+// ----------------------------------------------------------------------
+
+OsFile *OsFile::open(const char *fileName, bool randomAccess)
+{
+	UNREF(randomAccess);
+
+	if (!exists(fileName))
+		return 0;
+
+	// attempt to open the file
+	const int handle = ::open(fileName, O_RDONLY);
+	FATAL(handle < 0, ("OsFile::open failed to open file %s, errno=%d, which does exist.", fileName, errno));
+
+	return new OsFile(handle, DuplicateString(fileName));
+}
+
+// ----------------------------------------------------------------------
+
+OsFile::OsFile(int handle, char *fileName)
+:
+	m_handle(handle),
+	m_length(0),
+	m_offset(0),
+	m_fileName(fileName)
+{
+	m_length = lseek(m_handle, 0, SEEK_END);
+	lseek(m_handle, 0, SEEK_SET);
+}
+
+// ----------------------------------------------------------------------
+
+OsFile::~OsFile()
+{
+	close(m_handle);
+	delete [] m_fileName;
+}
+
+// ----------------------------------------------------------------------
+
+int OsFile::length() const
+{
+	return m_length;
+}
+
+// ----------------------------------------------------------------------
+
+void OsFile::seek(int newFilePosition)
+{
+	if (m_offset != newFilePosition)
+	{
+		const int result = lseek(m_handle, newFilePosition, SEEK_SET);
+		DEBUG_FATAL(result != newFilePosition, ("SetFilePointer failed"));
+		UNREF(result);
+		m_offset = newFilePosition;
+	}
+}
+
+// ----------------------------------------------------------------------
+
+int OsFile::read(void *destinationBuffer, int numberOfBytes)
+{
+	int result = 0;
+	do
+	{
+		result = ::read(m_handle, destinationBuffer, numberOfBytes);
+		DEBUG_FATAL((result < 0 && errno != EAGAIN), ("Read failed for %s: %d %d %s", m_fileName, result, errno, strerror(errno)));
+	} while (result < 0);
+
+	m_offset += result;
+	return result;
+}
+
+// ======================================================================

engine/shared/library/sharedFile/src/linux/OsFile.h

@@ -0,0 +1,51 @@
+// ======================================================================
+//
+// OsFile.h
+// Copyright 2002, Sony Online Entertainment Inc.
+// All Rights Reserved.
+//
+// ======================================================================
+
+#ifndef INCLUDED_OsFile_H
+#define INCLUDED_OsFile_H
+
+// ======================================================================
+
+class OsFile
+{
+public:
+
+	static void install();
+
+	static bool    exists(const char *fileName);
+	static int     getFileSize(const char *fileName);
+	static OsFile *open(const char *fileName, bool randomAccess=false);
+
+public:
+
+	~OsFile();
+
+	int  length() const;
+	int  tell() const;
+	void seek(int newFilePosition);
+	int  read(void *destinationBuffer, int numberOfBytes);
+
+private:
+
+	OsFile(int handle, char *fileName);
+
+	OsFile();
+	OsFile(const OsFile &);
+	OsFile &operator =(const OsFile &);
+
+private:
+
+	int    m_handle;
+	int    m_length;
+	int    m_offset;
+	char  *m_fileName;
+};
+
+// ======================================================================
+
+#endif