Hans Leidekker : msi: Handle environment strings without a value.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e52531ab1dae0e1edeb5787b545693ae5db0fd23
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=e52531ab1dae0e1edeb5787b545693ae5db0fd23

Author: Hans Leidekker <hans at codeweavers.com>
Date:   Fri Nov 13 11:06:12 2009 +0100

msi: Handle environment strings without a value.

---

 dlls/msi/action.c        |   39 +++++++++++++++++++++++----------------
 dlls/msi/tests/install.c |   10 +++++++++-
 2 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/dlls/msi/action.c b/dlls/msi/action.c
index a6af7cc..3a11c61 100644
--- a/dlls/msi/action.c
+++ b/dlls/msi/action.c
@@ -4888,7 +4888,6 @@ static UINT ACTION_InstallODBC( MSIPACKAGE *package )
 static LONG env_set_flags( LPCWSTR *name, LPCWSTR *value, DWORD *flags )
 {
     LPCWSTR cptr = *name;
-    LPCWSTR ptr = *value;
 
     static const WCHAR prefix[] = {'[','~',']',0};
     static const int prefix_len = 3;
@@ -4919,18 +4918,22 @@ static LONG env_set_flags( LPCWSTR *name, LPCWSTR *value, DWORD *flags )
         return ERROR_FUNCTION_FAILED;
     }
 
-    if (!strncmpW(ptr, prefix, prefix_len))
+    if (*value)
     {
-        *flags |= ENV_MOD_APPEND;
-        *value += lstrlenW(prefix);
-    }
-    else if (lstrlenW(*value) >= prefix_len)
-    {
-        ptr += lstrlenW(ptr) - prefix_len;
-        if (!lstrcmpW(ptr, prefix))
+        LPCWSTR ptr = *value;
+        if (!strncmpW(ptr, prefix, prefix_len))
         {
-            *flags |= ENV_MOD_PREFIX;
-            /* the "[~]" will be removed by deformat_string */;
+            *flags |= ENV_MOD_APPEND;
+            *value += lstrlenW(prefix);
+        }
+        else if (lstrlenW(*value) >= prefix_len)
+        {
+            ptr += lstrlenW(ptr) - prefix_len;
+            if (!lstrcmpW(ptr, prefix))
+            {
+                *flags |= ENV_MOD_PREFIX;
+                /* the "[~]" will be removed by deformat_string */;
+            }
         }
     }
 
@@ -4978,8 +4981,7 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
     if (res != ERROR_SUCCESS)
        goto done;
 
-    deformat_string(package, value, &deformatted);
-    if (!deformatted)
+    if (value && !deformat_string(package, value, &deformatted))
     {
         res = ERROR_OUTOFMEMORY;
         goto done;
@@ -5066,7 +5068,7 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
             }
         }
     }
-    else
+    else if (value)
     {
         size = (lstrlenW(value) + 1) * sizeof(WCHAR);
         newval = msi_alloc(size);
@@ -5079,8 +5081,13 @@ static UINT ITERATE_WriteEnvironmentString( MSIRECORD *rec, LPVOID param )
         lstrcpyW(newval, value);
     }
 
-    TRACE("setting %s to %s\n", debugstr_w(name), debugstr_w(newval));
-    res = RegSetValueExW(env, name, 0, type, (LPVOID)newval, size);
+    if (newval)
+    {
+        TRACE("setting %s to %s\n", debugstr_w(name), debugstr_w(newval));
+        res = RegSetValueExW(env, name, 0, type, (LPVOID)newval, size);
+    }
+    else
+        res = ERROR_SUCCESS;
 
 done:
     if (env) RegCloseKey(env);
diff --git a/dlls/msi/tests/install.c b/dlls/msi/tests/install.c
index 6efd290..35bbc85 100644
--- a/dlls/msi/tests/install.c
+++ b/dlls/msi/tests/install.c
@@ -174,7 +174,9 @@ static const CHAR environment_dat[] = "Environment\tName\tValue\tComponent_\n"
                                       "Var1\t=-MSITESTVAR1\t1\tOne\n"
                                       "Var2\tMSITESTVAR2\t1\tOne\n"
                                       "Var3\t=-MSITESTVAR3\t1\tOne\n"
-                                      "Var4\tMSITESTVAR4\t1\tOne\n";
+                                      "Var4\tMSITESTVAR4\t1\tOne\n"
+                                      "Var5\t-MSITESTVAR5\t\tOne\n"
+                                      "Var6\tMSITESTVAR6\t\tOne\n";
 
 static const CHAR condition_dat[] = "Feature_\tLevel\tCondition\n"
                                     "s38\ti2\tS255\n"
@@ -6610,6 +6612,12 @@ static void test_envvar(void)
     res = RegDeleteValueA(env, "MSITESTVAR4");
     ok(res == ERROR_SUCCESS, "Expected ERROR_SUCCESS, got %d\n", res);
 
+    res = RegDeleteValueA(env, "MSITESTVAR5");
+    ok(res == ERROR_FILE_NOT_FOUND, "Expected ERROR_FILE_NOT_FOUND, got %d\n", res);
+
+    res = RegDeleteValueA(env, "MSITESTVAR6");
+    ok(res == ERROR_FILE_NOT_FOUND, "Expected ERROR_FILE_NOT_FOUND, got %d\n", res);
+
     RegCloseKey(env);
 
     delete_pf("msitest\\cabout\\new\\five.txt", TRUE);