msvcp90: Added basic_string<wchar_t>::swap implementation.

dlls/msvcp80/msvcp80.spec

@@ -5481,8 +5481,8 @@
 @ cdecl -arch=win64 ?swap@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAXAEAV12@@Z (ptr ptr) msvcp90.?swap@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAXAEAV12@@Z
 @ stub -arch=win32 ?swap@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QAEXAAV12@@Z
 @ stub -arch=win64 ?swap@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEAAXAEAV12@@Z
-@ stub -arch=win32 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXAAV12@@Z
-@ stub -arch=win64 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXAEAV12@@Z
+@ thiscall -arch=win32 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXAAV12@@Z(ptr ptr) msvcp90.?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXAAV12@@Z
+@ cdecl -arch=win64 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXAEAV12@@Z(ptr ptr) msvcp90.?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXAEAV12@@Z
 @ stub -arch=win32 ?sync@?$basic_filebuf@DU?$char_traits@D@std@@@std@@MAEHXZ
 @ stub -arch=win64 ?sync@?$basic_filebuf@DU?$char_traits@D@std@@@std@@MEAAHXZ
 @ stub -arch=win32 ?sync@?$basic_filebuf@GU?$char_traits@G@std@@@std@@MAEHXZ

dlls/msvcp90/msvcp90.spec

@@ -5512,8 +5512,8 @@
 @ cdecl -arch=win64 ?swap@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAXAEAV12@@Z(ptr ptr) MSVCP_basic_string_char_swap
 @ stub -arch=win32 ?swap@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QAEXAAV12@@Z
 @ stub -arch=win64 ?swap@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEAAXAEAV12@@Z
-@ stub -arch=win32 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXAAV12@@Z
-@ stub -arch=win64 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXAEAV12@@Z
+@ thiscall -arch=win32 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXAAV12@@Z(ptr ptr) MSVCP_basic_string_wchar_swap
+@ cdecl -arch=win64 ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXAEAV12@@Z(ptr ptr) MSVCP_basic_string_wchar_swap
 @ stub -arch=win32 ?sync@?$basic_filebuf@DU?$char_traits@D@std@@@std@@MAEHXZ
 @ stub -arch=win64 ?sync@?$basic_filebuf@DU?$char_traits@D@std@@@std@@MEAAHXZ
 @ stub -arch=win32 ?sync@?$basic_filebuf@GU?$char_traits@G@std@@@std@@MAEHXZ

dlls/msvcp90/string.c

@@ -1039,3 +1039,25 @@ void __thiscall MSVCP_basic_string_char_swap(basic_string_char *this, basic_stri
         str->res = res;
     }
 }
+
+/* ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXAAV12@@Z */
+/* ?swap@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXAEAV12@@Z */
+DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_wchar_swap, 8)
+void __thiscall MSVCP_basic_string_wchar_swap(basic_string_wchar *this, basic_string_wchar *str)
+{
+    if(this != str) {
+        char tmp[sizeof(this->data)];
+        const size_t size = this->size;
+        const size_t res = this->res;
+
+        memcpy(tmp, this->data.buf, sizeof(this->data));
+        memcpy(this->data.buf, str->data.buf, sizeof(this->data));
+        memcpy(str->data.buf, tmp, sizeof(this->data));
+
+        this->size = str->size;
+        this->res = str->res;
+
+        str->size = size;
+        str->res = res;
+    }
+}