replace protocol presence ASSERTs with error returns.

signed-off-by: jcarsey
reviewed-by: lgrosenb

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11899 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 82 insertions, 72 deletions

diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index 6d885f468..ecc3f83c6 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -483,12 +483,10 @@ ShellOpenFileByDevicePath(
   EFI_FILE_PROTOCOL               *Handle1;

   EFI_FILE_PROTOCOL               *Handle2;

 

-  //

-  // ASERT for FileHandle, FilePath, and DeviceHandle being NULL

-  //

-  ASSERT(FilePath != NULL);

-  ASSERT(FileHandle != NULL);

-  ASSERT(DeviceHandle != NULL);

+  if (FilePath == NULL || FileHandle == NULL || DeviceHandle == NULL) {

+    return (EFI_INVALID_PARAMETER);

+  }

+

   //

   // which shell interface should we use

   //

@@ -601,7 +599,7 @@ ShellOpenFileByDevicePath(
   otherwise, the Filehandle is NULL. The Attributes is valid only for

   EFI_FILE_MODE_CREATE.

 

-  if FileNAme is NULL then ASSERT()

+  if FileName is NULL then ASSERT()

 

   @param  FileName 		  pointer to file name

   @param  FileHandle		pointer to the file handle.

@@ -1047,8 +1045,11 @@ ShellGetExecutionBreakFlag(
   //

   // using EFI Shell; call the function to check

   //

-  ASSERT(mEfiShellEnvironment2 != NULL);

-  return (mEfiShellEnvironment2->GetExecutionBreak());

+  if (mEfiShellEnvironment2 != NULL) {

+    return (mEfiShellEnvironment2->GetExecutionBreak());

+  }

+

+  return (FALSE);

 }

 /**

   return the value of an environment variable

@@ -1075,14 +1076,13 @@ ShellGetEnvironmentVariable (
   }

 

   //

-  // ASSERT that we must have EFI shell

+  // Check for EFI shell

   //

-  ASSERT(mEfiShellEnvironment2 != NULL);

+  if (mEfiShellEnvironment2 != NULL) {

+    return (mEfiShellEnvironment2->GetEnv((CHAR16*)EnvKey));

+  }

 

-  //

-  // using EFI Shell

-  //

-  return (mEfiShellEnvironment2->GetEnv((CHAR16*)EnvKey));

+  return NULL;

 }

 /**

   set the value of an environment variable

@@ -1177,17 +1177,21 @@ ShellExecute (
                                       EnvironmentVariables,

                                       Status));

   }

+

   //

-  // ASSERT that we must have EFI shell

-  //

-  ASSERT(mEfiShellEnvironment2 != NULL);

-  //

-  // Call EFI Shell version (not using EnvironmentVariables or Status parameters)

-  // Due to oddity in the EFI shell we want to dereference the ParentHandle here

+  // Check for EFI shell

   //

-  return (mEfiShellEnvironment2->Execute(*ParentHandle,

-                                        CommandLine,

-                                        Output));

+  if (mEfiShellEnvironment2 != NULL) {

+    //

+    // Call EFI Shell version (not using EnvironmentVariables or Status parameters)

+    // Due to oddity in the EFI shell we want to dereference the ParentHandle here

+    //

+    return (mEfiShellEnvironment2->Execute(*ParentHandle,

+                                          CommandLine,

+                                          Output));

+  }

+

+  return (EFI_UNSUPPORTED);

 }

 /**

   Retreives the current directory path

@@ -1213,6 +1217,7 @@ ShellGetCurrentDir (
   if (mEfiShellProtocol != NULL) {

     return (mEfiShellProtocol->GetCurDir(DeviceName));

   }

+

   //

   // Check for EFI shell

   //

@@ -1251,14 +1256,15 @@ ShellSetPageBreakMode (
       return;

     } else {

       //

-      // ASSERT that must have EFI Shell

-      //

-      ASSERT(mEfiShellEnvironment2 != NULL);

-      //

-      // Enable with EFI Shell

+      // Check for EFI shell

       //

-      mEfiShellEnvironment2->EnablePageBreak (DEFAULT_INIT_ROW, DEFAULT_AUTO_LF);

-      return;

+      if (mEfiShellEnvironment2 != NULL) {

+        //

+        // Enable with EFI Shell

+        //

+        mEfiShellEnvironment2->EnablePageBreak (DEFAULT_INIT_ROW, DEFAULT_AUTO_LF);

+        return;

+      }

     }

   } else {

     //

@@ -1272,14 +1278,15 @@ ShellSetPageBreakMode (
       return;

     } else {

       //

-      // ASSERT that must have EFI Shell

-      //

-      ASSERT(mEfiShellEnvironment2 != NULL);

+      // Check for EFI shell

       //

-      // Disable with EFI Shell

-      //

-      mEfiShellEnvironment2->DisablePageBreak ();

-      return;

+      if (mEfiShellEnvironment2 != NULL) {

+        //

+        // Disable with EFI Shell

+        //

+        mEfiShellEnvironment2->DisablePageBreak ();

+        return;

+      }

     }

   }

 }

@@ -1463,49 +1470,50 @@ ShellOpenFileMetaArg (
   }

 

   //

-  // ASSERT that we must have EFI shell

-  //

-  ASSERT(mEfiShellEnvironment2 != NULL);

-

-  //

-  // make sure the list head is initialized

+  // Check for EFI shell

   //

-  InitializeListHead(&mOldStyleFileList);

+  if (mEfiShellEnvironment2 != NULL) {

+    //

+    // make sure the list head is initialized

+    //

+    InitializeListHead(&mOldStyleFileList);

 

-  //

-  // Get the EFI Shell list of files

-  //

-  Status = mEfiShellEnvironment2->FileMetaArg(Arg, &mOldStyleFileList);

-  if (EFI_ERROR(Status)) {

-    *ListHead = NULL;

-    return (Status);

-  }

+    //

+    // Get the EFI Shell list of files

+    //

+    Status = mEfiShellEnvironment2->FileMetaArg(Arg, &mOldStyleFileList);

+    if (EFI_ERROR(Status)) {

+      *ListHead = NULL;

+      return (Status);

+    }

 

-  if (*ListHead == NULL) {

-    *ListHead = (EFI_SHELL_FILE_INFO    *)AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));

     if (*ListHead == NULL) {

-      return (EFI_OUT_OF_RESOURCES);

+      *ListHead = (EFI_SHELL_FILE_INFO    *)AllocateZeroPool(sizeof(EFI_SHELL_FILE_INFO));

+      if (*ListHead == NULL) {

+        return (EFI_OUT_OF_RESOURCES);

+      }

+      InitializeListHead(&((*ListHead)->Link));

     }

-    InitializeListHead(&((*ListHead)->Link));

-  }

 

-  //

-  // Convert that to equivalent of UEFI Shell 2.0 structure

-  //

-  InternalShellConvertFileListType(&mOldStyleFileList, &(*ListHead)->Link);

+    //

+    // Convert that to equivalent of UEFI Shell 2.0 structure

+    //

+    InternalShellConvertFileListType(&mOldStyleFileList, &(*ListHead)->Link);

 

-  //

-  // Free the EFI Shell version that was converted.

-  //

-  mEfiShellEnvironment2->FreeFileList(&mOldStyleFileList);

+    //

+    // Free the EFI Shell version that was converted.

+    //

+    mEfiShellEnvironment2->FreeFileList(&mOldStyleFileList);

 

-  if ((*ListHead)->Link.ForwardLink == (*ListHead)->Link.BackLink && (*ListHead)->Link.BackLink == &((*ListHead)->Link)) {

-    FreePool(*ListHead);

-    *ListHead = NULL;

-    Status = EFI_NOT_FOUND;

+    if ((*ListHead)->Link.ForwardLink == (*ListHead)->Link.BackLink && (*ListHead)->Link.BackLink == &((*ListHead)->Link)) {

+      FreePool(*ListHead);

+      *ListHead = NULL;

+      Status = EFI_NOT_FOUND;

+    }

+    return (Status);

   }

 

-  return (Status);

+  return (EFI_UNSUPPORTED);

 }

 /**

   Free the linked list returned from ShellOpenFileMetaArg.

@@ -1534,7 +1542,7 @@ ShellCloseFileMetaArg (
   //

   if (mEfiShellProtocol != NULL) {

     return (mEfiShellProtocol->FreeFileList(ListHead));

-  } else {

+  } else if (mEfiShellEnvironment2 != NULL) {

     //

     // Since this is EFI Shell version we need to free our internally made copy

     // of the list

@@ -1551,6 +1559,8 @@ ShellCloseFileMetaArg (
     }

     return EFI_SUCCESS;

   }

+

+  return (EFI_UNSUPPORTED);

 }

 

 /**