+ windows large file support fix

src/zimlib/include/zim/zim.h

@@ -107,7 +107,12 @@ namespace zim
 #endif
 
   typedef uint32_t size_type;
+  
+  #ifdef _WIN32
+  typedef __int64 offset_type;
+  #else
   typedef uint64_t offset_type;
+  #endif
 
   enum CompressionType
   {

src/zimlib/src/fileimpl.cpp

@@ -53,6 +53,9 @@ namespace zim
 #ifdef HAVE_STAT64
     struct stat64 st;
     int ret = ::stat64(fname, &st);
+#elif _WIN32
+    struct __stat64 st;
+    int ret = ::_stat64(fname, &st);    
 #else
     struct stat st;
     int ret = ::stat(fname, &st);

src/zimlib/src/fstream.cpp

@@ -25,13 +25,13 @@
 #include <errno.h>
 #include <string.h>
 #include <fcntl.h>
-//#include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 
 #ifdef _WIN32
 #include <io.h>
 int _fmode = _O_BINARY;
+#define _LARGEFILE64_SOURCE
 #endif
 
 log_define("zim.fstream")
@@ -95,9 +95,12 @@ void streambuf::seekg(offset_type off)
   setg(0, 0, 0);
   #ifdef HAVE_LSEEK64
   off64_t ret = ::lseek64(fd, off, SEEK_SET);
+  #elif _WIN32
+  offset_type ret = ::_lseeki64(fd, off, SEEK_SET);  
   #else
   off_t ret = ::lseek(fd, off, SEEK_SET);
   #endif
+
   if (ret < 0)
   {
     std::ostringstream msg;