* Change Athena::utility::fileSize to use stat64 instead of ftello

* Fix output of ftello64 in win32_largefilewrapper

include/Athena/Utility.hpp

@@ -74,7 +74,7 @@ std::string &rtrim(std::string &s);
 
 // trim from both ends
 std::string &trim(std::string &s);
-atUint64 fileSize(FILE* f);
+atUint64 fileSize(const std::string& filename);
 } // utility
 } // Athena
 #endif

include/win32_largefilewrapper.h

@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 int fseeko64(FILE* fp, off64_t offset, int whence);
-int ftello64(FILE* fp);
+off64_t ftello64(FILE* fp);
 #ifdef __cplusplus
 }
 #endif

src/Athena/FileReader.cpp

@@ -119,7 +119,7 @@ atUint64 FileReader::length() const
     if (!isOpen())
         THROW_INVALID_OPERATION_EXCEPTION("File not open");
 
-    return utility::fileSize(m_fileHandle);
+    return utility::fileSize(m_filename);
 }
 
 void FileReader::seekBit(int bit)

src/Athena/FileWriter.cpp

@@ -109,7 +109,7 @@ atUint64 FileWriter::position() const
 
 atUint64 FileWriter::length() const
 {
-    return utility::fileSize(m_fileHandle);
+    return utility::fileSize(m_filename);
 }
 
 void FileWriter::writeBit(bool val)

src/Athena/Utility.cpp

@@ -22,6 +22,7 @@
 #include <cstdarg>
 #include <iterator>
 #include <cstdio>
+#include <sys/stat.h>
 
 namespace Athena
 {
@@ -365,13 +366,11 @@ int countChar(const std::string& str, const char chr, int* lastOccur)
     return ret;
 }
 
-atUint64 fileSize(FILE* f)
+atUint64 fileSize(const std::string& filename)
 {
-    atUint64 oldPos = ftello64(f);
-    fseeko64(f, 0, SEEK_END);
-    atUint64 size = ftello64(f);
-    fseeko64(f, oldPos, SEEK_SET);
-    return size;
+    struct stat64 st;
+    stat64(filename.c_str(), &st);
+    return st.st_size;
 }
 
 std::string& ltrim(std::string& s)

src/win32_largefilewrapper.c

@@ -7,7 +7,7 @@ int fseeko64(FILE* fp, off64_t offset, int whence)
     return _fseeki64(fp, offset, whence);
 }
 
-int ftello64(FILE* fp)
+off64_t ftello64(FILE* fp)
 {
     return _ftelli64(fp);
 }