[PATCH 7/11] apphelp: Implement SdbReadDWORDTag.

[Mislav Blazevic]

---
 dlls/apphelp/apphelp.c    | 40 ++++++++++++++++++++++++++++++++++++++++
 dlls/apphelp/apphelp.spec |  1 +
 include/appcompatapi.h    |  1 +
 3 files changed, 42 insertions(+)

diff --git a/dlls/apphelp/apphelp.c b/dlls/apphelp/apphelp.c
index 241e2b5..364cd0e 100644
--- a/dlls/apphelp/apphelp.c
+++ b/dlls/apphelp/apphelp.c
@@ -539,3 +539,43 @@ TAGID WINAPI SdbGetFirstChild(PDB db, TAGID parent)
     /* first child is sizeof(TAG) + sizeof(DWORD) bytes after beginning */
     return parent + 6;
 }
+
+/**************************************************************************
+ *        SdbReadDWORDTag                [APPHELP.@]
+ *
+ * Reads DWORD value at specified tagid
+ *
+ * PARAMS
+ *  db          [I] Handle to the shim database
+ *  tagid       [I] TAGID of DWORD value
+ *  ret         [I] Default return value in case function fails
+ *
+ * RETURNS
+ *  Success: DWORD value at specified tagid
+ *  Failure: ret
+ */
+DWORD WINAPI SdbReadDWORDTag(PDB db, TAGID tagid, DWORD ret)
+{
+    TAG tag;
+
+    tag = SdbGetTagFromTagID(db, tagid);
+    if (tag == TAG_NULL)
+    {
+        TRACE("Failed to find tag for tagid %u\n", tagid);
+        return ret;
+    }
+
+    if ((tag & TAG_TYPE_MASK) != TAG_TYPE_DWORD)
+    {
+        TRACE("Tag associated with tagid %u is not a DWORD\n", tagid);
+        return ret;
+    }
+
+    if (!SdbReadData(db, &ret, tagid + 2, sizeof(DWORD)))
+    {
+        TRACE("Failed to read DWORD tag %s at tagid %u\n",
debugstr_w(SdbTagToString(tag)), tagid);
+        return ret;
+    }
+
+    return ret;
+}
diff --git a/dlls/apphelp/apphelp.spec b/dlls/apphelp/apphelp.spec
index 6a96a7d..17794ca 100644
--- a/dlls/apphelp/apphelp.spec
+++ b/dlls/apphelp/apphelp.spec
@@ -113,6 +113,7 @@
 @ stub SdbReadApphelpDetailsData
 @ stub SdbReadBinaryTag
 @ stub SdbReadBYTETag
+@ stdcall SdbReadDWORDTag(ptr long long)
 @ stub SdbReadDWORDTagRef
 @ stub SdbReadEntryInformation
 @ stub SdbReadMsiTransformInfo
diff --git a/include/appcompatapi.h b/include/appcompatapi.h
index 185bd33..8daccaf 100644
--- a/include/appcompatapi.h
+++ b/include/appcompatapi.h
@@ -30,6 +30,7 @@ void WINAPI SdbCloseDatabase(PDB);
 PDB WINAPI SdbOpenDatabase(LPCWSTR, PATH_TYPE);
 TAG WINAPI SdbGetTagFromTagID(PDB, TAGID);
 TAGID WINAPI SdbGetFirstChild(PDB, TAGID);
+DWORD WINAPI SdbReadDWORDTag(PDB db, TAGID tagid, DWORD ret);

 typedef enum _PATH_TYPE {
     DOS_PATH,
-- 
1.8.3.4