build break fix and new function

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9461 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Include/Library/ShellLib.h

@@ -718,8 +718,8 @@ ShellCommandLineGetFlag (
   
   If CheckPackage is NULL, then return NULL.
 
-  @param CheckPackage           The package of parsed command line arguments.
+  @param[in] CheckPackage       The package of parsed command line arguments.
-  @param KeyString              The Key of the command line argument to check for.
+  @param[in] KeyString          The Key of the command line argument to check for.
 
   @retval NULL                  The flag is not on the command line.
   @retval !=NULL                Pointer to unicode string of the value.
@@ -736,10 +736,10 @@ ShellCommandLineGetValue (
 
   Raw value parameters are in the form of "value" in a specific position in the list.
   
-  If CheckPackage is NULL, then return NULL;
+  If CheckPackage is NULL, then return NULL.
 
-  @param CheckPackage           The package of parsed command line arguments.
+  @param[in] CheckPackage       The package of parsed command line arguments.
-  @param Position               The position of the value.
+  @param[in] Position           The position of the value.
 
   @retval NULL                  The flag is not on the command line.
   @retval !=NULL                Pointer to unicode string of the value.
@@ -765,6 +765,27 @@ ShellCommandLineGetCount(
   VOID
   );
 
+/**
+  Determins if a parameter is duplicated.
+
+  If Param is not NULL then it will point to a callee allocated string buffer 
+  with the parameter value if a duplicate is found.
+
+  If CheckPackage is NULL, then ASSERT.
+
+  @param[in] CheckPackage       The package of parsed command line arguments.
+  @param[out] Param             Upon finding one, a pointer to the duplicated parameter.
+
+  @retval EFI_SUCCESS           No parameters were duplicated.
+  @retval EFI_DEVICE_ERROR      A duplicate was found.
+  **/
+EFI_STATUS
+EFIAPI
+ShellCommandLineCheckDuplicate (
+  IN CONST LIST_ENTRY              *CheckPackage,
+  OUT CHAR16                       **Param
+  );
+
 /**
   This function causes the shell library to initialize itself.  If the shell library
   is already initialized it will de-initialize all the current protocol poitners and

ShellPkg/Include/Protocol/EfiShell.h

@@ -791,7 +791,7 @@ EFI_STATUS
                                 If Alias is NULL, ReturnedData points to a <20>;<3B> 
                                 delimited list of alias (e.g. 
                                 ReturnedData = <20>dir;del;copy;mfp<66>) that is null-terminated.  
-  @retval NULL                  an error ocurred.
+  @retval NULL                  An error ocurred.
   @retval NULL                  Alias was not a valid Alias.
 **/
 typedef 

ShellPkg/Library/UefiShellLib/UefiShellLib.c

@@ -1489,12 +1489,15 @@ ShellFindFilePath (
   CHAR16            *RetVal;
   CHAR16            *TestPath;
   CONST CHAR16      *Walker;
+  UINTN             Size;
 
   RetVal = NULL;
 
   Path = ShellGetEnvironmentVariable(L"cwd");
   if (Path != NULL) {
-    TestPath = AllocateZeroPool((StrSize(Path) + StrSize(FileName)));
+    Size = StrSize(Path);
+    Size += StrSize(FileName);
+    TestPath = AllocateZeroPool(Size);
     StrCpy(TestPath, Path);
     StrCat(TestPath, FileName);
     Status = ShellOpenFileByName(TestPath, &Handle, EFI_FILE_MODE_READ, 0);
@@ -1508,7 +1511,9 @@ ShellFindFilePath (
   }
   Path = ShellGetEnvironmentVariable(L"path");
   if (Path != NULL) {
-    TestPath = AllocateZeroPool((StrSize(Path)+StrSize(FileName)));
+    Size = StrSize(Path);
+    Size += StrSize(FileName);
+    TestPath = AllocateZeroPool(Size);
     Walker = (CHAR16*)Path; 
     do {
       CopyMem(TestPath, Walker, StrSize(Walker));
@@ -2129,6 +2134,52 @@ ShellCommandLineGetCount(
   return (mTotalParameterCount);
 }
 
+/**
+  Determins if a parameter is duplicated.
+
+  If Param is not NULL then it will point to a callee allocated string buffer 
+  with the parameter value if a duplicate is found.
+
+  If CheckPackage is NULL, then ASSERT.
+
+  @param[in] CheckPackage       The package of parsed command line arguments.
+  @param[out] Param             Upon finding one, a pointer to the duplicated parameter.
+
+  @retval EFI_SUCCESS           No parameters were duplicated.
+  @retval EFI_DEVICE_ERROR      A duplicate was found.
+  **/
+EFI_STATUS
+EFIAPI
+ShellCommandLineCheckDuplicate (
+  IN CONST LIST_ENTRY              *CheckPackage,
+  OUT CHAR16                       **Param
+  )
+{
+  LIST_ENTRY                    *Node1;
+  LIST_ENTRY                    *Node2;
+  
+  ASSERT(CheckPackage != NULL);
+
+  for ( Node1 = GetFirstNode(CheckPackage) 
+      ; !IsNull (CheckPackage, Node1) 
+      ; Node1 = GetNextNode(CheckPackage, Node1) 
+      ){
+    for ( Node2 = GetNextNode(CheckPackage, Node1) 
+        ; !IsNull (CheckPackage, Node2) 
+        ; Node2 = GetNextNode(CheckPackage, Node2) 
+        ){
+      if (StrCmp(((SHELL_PARAM_PACKAGE*)Node1)->Name, ((SHELL_PARAM_PACKAGE*)Node2)->Name) == 0) {
+        if (Param != NULL) {
+          *Param = NULL;
+          *Param = StrnCatGrow(Param, NULL, ((SHELL_PARAM_PACKAGE*)Node1)->Name, 0);
+        }
+        return (EFI_DEVICE_ERROR);
+      }
+    }
+  }
+  return (EFI_SUCCESS);
+}
+
 /**
   This is a find and replace function.  it will return the NewString as a copy of 
   SourceString with each instance of FindTarget replaced with ReplaceWith.
@@ -2459,6 +2510,39 @@ ShellIsDirectory(
   return (EFI_NOT_FOUND);
 }
 
+/**
+  Function to determine if a given filename represents a file.
+
+  @param[in] Name         Path to file to test.
+
+  @retval EFI_SUCCESS     The Path represents a file.
+  @retval EFI_NOT_FOUND   The Path does not represent a file.
+  @retval other           The path failed to open.
+**/
+EFI_STATUS
+EFIAPI
+ShellIsFile(
+  IN CONST CHAR16 *Name
+  )
+{
+  EFI_STATUS        Status;
+  EFI_FILE_HANDLE   Handle;
+
+  Handle = NULL;
+
+  Status = ShellOpenFileByName(Name, &Handle, EFI_FILE_MODE_READ, 0);
+  if (EFI_ERROR(Status)) {
+    return (Status);
+  }
+
+  if (FileHandleIsDirectory(Handle) != EFI_SUCCESS) {
+    ShellCloseFile(&Handle);
+    return (EFI_SUCCESS);
+  }
+  ShellCloseFile(&Handle);
+  return (EFI_NOT_FOUND);
+}
+
 /**
   Function to determine whether a string is decimal or hex representation of a number 
   and return the number converted from the string.