msvcp100: Add ios_base::swap implementation.

dlls/msvcp100/msvcp100.spec

@@ -2716,8 +2716,8 @@
 @ stub -arch=win64 ?swap@?$basic_streambuf@GU?$char_traits@G@std@@@std@@IEAAXAEAV12@@Z
 @ stub -arch=win32 ?swap@?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IAEXAAV12@@Z
 @ stub -arch=win64 ?swap@?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IEAAXAEAV12@@Z
-@ stub -arch=win32 ?swap@ios_base@std@@QAEXAAV12@@Z
-@ stub -arch=win64 ?swap@ios_base@std@@QEAAXAEAV12@@Z
+@ thiscall -arch=win32 ?swap@ios_base@std@@QAEXAAV12@@Z(ptr ptr) ios_base_swap
+@ cdecl -arch=win64 ?swap@ios_base@std@@QEAAXAEAV12@@Z(ptr ptr) ios_base_swap
 @ thiscall -arch=win32 ?sync@?$basic_istream@DU?$char_traits@D@std@@@std@@QAEHXZ(ptr) basic_istream_char_sync
 @ cdecl -arch=win64 ?sync@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAAHXZ(ptr) basic_istream_char_sync
 @ thiscall -arch=win32 ?sync@?$basic_istream@GU?$char_traits@G@std@@@std@@QAEHXZ(ptr) basic_istream_wchar_sync

dlls/msvcp110/msvcp110.spec

@@ -3506,9 +3506,9 @@
 @ stub -arch=arm ?swap@?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IAAXAAV12@@Z
 @ stub -arch=i386 ?swap@?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IAEXAAV12@@Z
 @ stub -arch=win64 ?swap@?$basic_streambuf@_WU?$char_traits@_W@std@@@std@@IEAAXAEAV12@@Z
-@ stub -arch=arm ?swap@ios_base@std@@QAAXAAV12@@Z
-@ stub -arch=i386 ?swap@ios_base@std@@QAEXAAV12@@Z
-@ stub -arch=win64 ?swap@ios_base@std@@QEAAXAEAV12@@Z
+@ cdecl -arch=arm ?swap@ios_base@std@@QAAXAAV12@@Z(ptr ptr) ios_base_swap
+@ thiscall -arch=i386 ?swap@ios_base@std@@QAEXAAV12@@Z(ptr ptr) ios_base_swap
+@ cdecl -arch=win64 ?swap@ios_base@std@@QEAAXAEAV12@@Z(ptr ptr) ios_base_swap
 @ cdecl -arch=arm ?sync@?$basic_istream@DU?$char_traits@D@std@@@std@@QAAHXZ(ptr) basic_istream_char_sync
 @ thiscall -arch=i386 ?sync@?$basic_istream@DU?$char_traits@D@std@@@std@@QAEHXZ(ptr) basic_istream_char_sync
 @ cdecl -arch=win64 ?sync@?$basic_istream@DU?$char_traits@D@std@@@std@@QEAAHXZ(ptr) basic_istream_char_sync

dlls/msvcp90/ios.c

@@ -5264,6 +5264,25 @@ int CDECL ios_base_xalloc(void)
     return ret;
 }
 
+/* ?swap@ios_base@std@@QAEXAAV12@@Z */
+/* ?swap@ios_base@std@@QEAAXAEAV12@@Z */
+DEFINE_THISCALL_WRAPPER(ios_base_swap, 8)
+void __thiscall ios_base_swap(ios_base *this, ios_base *r)
+{
+    ios_base tmp;
+
+    TRACE("(%p %p)\n", this, r);
+
+    if(this == r)
+        return;
+
+    tmp = *this;
+    *this = *r;
+    this->vtable = tmp.vtable;
+    tmp.vtable = r->vtable;
+    *r = tmp;
+}
+
 /* ??0?$basic_ios@DU?$char_traits@D@std@@@std@@IAE@XZ */
 /* ??0?$basic_ios@DU?$char_traits@D@std@@@std@@IEAA@XZ */
 DEFINE_THISCALL_WRAPPER(basic_ios_char_ctor, 4)