[PATCH setup] Add OS version to user-agent string

[Jon Turney <jon dot turney at dronecode dot org dot uk>]

Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk>
---
 nio-ie5.cc | 12 ++++++++----
 win32.h    |  2 ++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/nio-ie5.cc b/nio-ie5.cc
index c8f65a9..a649233 100644
--- a/nio-ie5.cc
+++ b/nio-ie5.cc
@@ -29,6 +29,7 @@
 #include "LogSingleton.h"
 #include "setup_version.h"
 #include "getopt++/StringOption.h"
+#include <sstream>
 
 static StringOption UserAgent ("", '\0', "user-agent", "User agent string for HTTP requests");
 
@@ -43,19 +44,22 @@ determine_default_useragent(void)
   if (!default_useragent.empty())
     return default_useragent;
 
-  std::string token = "Unknown";
+  std::stringstream os;
+  os << "Windows NT " << OSMajorVersion() << "." << OSMinorVersion() << "." << OSBuildNumber();
+
+  std::string bitness = "Unknown";
 #ifdef __x86_64__
-  token = "Win64";
+  bitness = "Win64";
 #else
   typedef BOOL (WINAPI *PFNISWOW64PROCESS)(HANDLE, PBOOL);
   PFNISWOW64PROCESS pfnIsWow64Process = (PFNISWOW64PROCESS)GetProcAddress(GetModuleHandle("kernel32"), "IsWow64Process");
   if (pfnIsWow64Process) {
     BOOL bIsWow64 = FALSE;
     if (pfnIsWow64Process(GetCurrentProcess(), &bIsWow64))
-      token = bIsWow64 ? "WoW64" : "Win32";
+      bitness = bIsWow64 ? "WoW64" : "Win32";
   }
 #endif
-  default_useragent = std::string("Cygwin-Setup/") + setup_version + " (" + token + ")";
+  default_useragent = std::string("Cygwin-Setup/") + setup_version + " (" + os.str() + ";" + bitness + ")";
   return default_useragent;
 }
 
diff --git a/win32.h b/win32.h
index fd4c80c..c866790 100644
--- a/win32.h
+++ b/win32.h
@@ -166,6 +166,7 @@ class VersionInfo
      VersionInfo ();
      DWORD major () const { return v.dwMajorVersion; }
      DWORD minor () const { return v.dwMinorVersion; }
+     DWORD buildNumber () const { return v.dwBuildNumber; }
   private:
      OSVERSIONINFO v;
 };
@@ -174,6 +175,7 @@ VersionInfo& GetVer ();
 
 #define OSMajorVersion() (GetVer ().major ())
 #define OSMinorVersion() (GetVer ().minor ())
+#define OSBuildNumber() (GetVer ().buildNumber ())
 
 static inline void
 GetDlgItemRect (HWND h, int item, LPRECT r)
-- 
2.14.2