Alexandre Julliard : user: Fix handling of high bits of resource id in LoadString, reported by Andrey Turkin.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: dea8c6a9ceba97b646eb1621b8b6d0a396a20b0e
URL:    http://source.winehq.org/git/?p=wine.git;a=commit;h=dea8c6a9ceba97b646eb1621b8b6d0a396a20b0e

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Sep 21 20:47:20 2006 +0200

user: Fix handling of high bits of resource id in LoadString, reported by Andrey Turkin.

---

 dlls/user/resource.c        |   10 ++--------
 dlls/user/tests/resource.c  |   15 +++++++++++++++
 dlls/user/tests/resource.rc |    2 ++
 3 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/dlls/user/resource.c b/dlls/user/resource.c
index 29ce970..8c66431 100644
--- a/dlls/user/resource.c
+++ b/dlls/user/resource.c
@@ -364,14 +364,11 @@ INT WINAPI LoadStringW( HINSTANCE instan
     int string_num;
     int i;
 
-    if (HIWORD(resource_id)==0xFFFF) /* netscape 3 passes this */
-	resource_id = (UINT)(-((INT)resource_id));
     TRACE("instance = %p, id = %04x, buffer = %p, length = %d\n",
           instance, resource_id, buffer, buflen);
 
-    /* Use bits 4 - 19 (incremented by 1) as resourceid, mask out
-     * 20 - 31. */
-    hrsrc = FindResourceW( instance, MAKEINTRESOURCEW(((resource_id>>4)&0xffff)+1),
+    /* Use loword (incremented by 1) as resourceid */
+    hrsrc = FindResourceW( instance, MAKEINTRESOURCEW((LOWORD(resource_id) >> 4) + 1),
                            (LPWSTR)RT_STRING );
     if (!hrsrc) return 0;
     hmem = LoadResource( instance, hrsrc );
@@ -394,9 +391,6 @@ INT WINAPI LoadStringW( HINSTANCE instan
 	    buffer[0] = (WCHAR) 0;
 	    return 0;
 	}
-#if 0
-	WARN("Don't know why caller gave buflen=%d *p=%d trying to obtain string '%s'\n", buflen, *p, p + 1);
-#endif
     }
 
     TRACE("%s loaded !\n", debugstr_w(buffer));
diff --git a/dlls/user/tests/resource.c b/dlls/user/tests/resource.c
index dc87931..30ee4af 100644
--- a/dlls/user/tests/resource.c
+++ b/dlls/user/tests/resource.c
@@ -46,6 +46,7 @@ static void test_LoadStringA (void)
                                   {sizeof str, sizeof str - 1},
                                   {sizeof str - 1, sizeof str - 2}};
     unsigned int i;
+    int ret;
 
     assert (sizeof str < sizeof buf);
     for (i = 0; i < sizeof tests / sizeof tests[0]; i++) {
@@ -61,6 +62,20 @@ static void test_LoadStringA (void)
         ok (buf[len] == 0, "bufsiz=%d: NUL termination missing\n",
             bufsiz);
     }
+
+    ret = LoadStringA(hInst, 1, buf, sizeof(buf) );
+    ok( ret > 0, "LoadString failed: ret %d err %ld\n", ret, GetLastError());
+    ok( LoadStringA( hInst, MAKELONG( 1, 0x8000 ), buf, sizeof(buf)) == ret,
+        "LoadString failed: ret %d err %ld\n", ret, GetLastError());
+    ok( LoadStringA( hInst, MAKELONG( 1, 0xffff ), buf, sizeof(buf)) == ret,
+        "LoadString failed: ret %d err %ld\n", ret, GetLastError());
+
+    ret = LoadStringA(hInst, 65534, buf, sizeof(buf) );
+    ok( ret > 0, "LoadString failed: ret %d err %ld\n", ret, GetLastError());
+    ok( LoadStringA( hInst, MAKELONG( 65534, 0x8000 ), buf, sizeof(buf)) == ret,
+        "LoadString failed: ret %d err %ld\n", ret, GetLastError());
+    ok( LoadStringA( hInst, MAKELONG( 65534, 0xffff ), buf, sizeof(buf)) == ret,
+        "LoadString failed: ret %d err %ld\n", ret, GetLastError());
 }
 
 static void test_accel1(void)
diff --git a/dlls/user/tests/resource.rc b/dlls/user/tests/resource.rc
index 305b06a..e882728 100644
--- a/dlls/user/tests/resource.rc
+++ b/dlls/user/tests/resource.rc
@@ -40,6 +40,8 @@ #include "winuser.h"
 STRINGTABLE
 {
   0 "String resource"
+  1 "Another string resource"
+  65534 "Test high id"
 }
 
 TEST_DIALOG DIALOG DISCARDABLE 0, 0, 60, 30