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/** @file
Main file for NULL named library for level 1 shell command functions.
Copyright (c) 2013, Hewlett-Packard Development Company, L.P.
Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "UefiShellLevel1CommandsLib.h"
STATIC CONST CHAR16 mFileName[] = L"ShellCommands";
EFI_HANDLE gShellLevel1HiiHandle = NULL;
/**
Return the help text filename. Only used if no HII information found.
@retval the filename.
**/
CONST CHAR16*
EFIAPI
ShellCommandGetManFileNameLevel1 (
VOID
)
{
return (mFileName);
}
/**
Constructor for the Shell Level 1 Commands library.
Install the handlers for level 1 UEFI Shell 2.0 commands.
@param ImageHandle the image handle of the process
@param SystemTable the EFI System Table pointer
@retval EFI_SUCCESS the shell command handlers were installed sucessfully
@retval EFI_UNSUPPORTED the shell level required was not found.
**/
EFI_STATUS
EFIAPI
ShellLevel1CommandsLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
//
// if shell level is less than 2 do nothing
//
if (PcdGet8(PcdShellSupportLevel) < 1) {
return (EFI_SUCCESS);
}
gShellLevel1HiiHandle = HiiAddPackages (&gShellLevel1HiiGuid, gImageHandle, UefiShellLevel1CommandsLibStrings, NULL);
if (gShellLevel1HiiHandle == NULL) {
return (EFI_DEVICE_ERROR);
}
//
// install our shell command handlers that are always installed
//
ShellCommandRegisterCommandName(L"stall", ShellCommandRunStall , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_STALL) ));
ShellCommandRegisterCommandName(L"for", ShellCommandRunFor , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_FOR) ));
ShellCommandRegisterCommandName(L"goto", ShellCommandRunGoto , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_GOTO) ));
ShellCommandRegisterCommandName(L"if", ShellCommandRunIf , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_IF) ));
ShellCommandRegisterCommandName(L"shift", ShellCommandRunShift , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_SHIFT) ));
ShellCommandRegisterCommandName(L"exit", ShellCommandRunExit , ShellCommandGetManFileNameLevel1, 1, L"", TRUE , gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_EXIT) ));
ShellCommandRegisterCommandName(L"else", ShellCommandRunElse , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_ELSE) ));
ShellCommandRegisterCommandName(L"endif", ShellCommandRunEndIf , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_ENDIF) ));
ShellCommandRegisterCommandName(L"endfor", ShellCommandRunEndFor , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_ENDFOR)));
return (EFI_SUCCESS);
}
/**
Destructor for the library. free any resources.
@param ImageHandle The image handle of the process.
@param SystemTable The EFI System Table pointer.
**/
EFI_STATUS
EFIAPI
ShellLevel1CommandsLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
if (gShellLevel1HiiHandle != NULL) {
HiiRemovePackages(gShellLevel1HiiHandle);
}
return (EFI_SUCCESS);
}
/**
Test a node to see if meets the criterion.
It functions so that count starts at 1 and it increases or decreases when it
hits the specified tags. when it hits zero the location has been found.
DecrementerTag and IncrementerTag are used to get around for/endfor and
similar paired types where the entire middle should be ignored.
If label is used it will be used instead of the count.
@param[in] Function The function to use to enumerate through the
list. Normally GetNextNode or GetPreviousNode.
@param[in] DecrementerTag The tag to decrement the count at.
@param[in] IncrementerTag The tag to increment the count at.
@param[in] Label A label to look for.
@param[in, out] ScriptFile The pointer to the current script file structure.
@param[in] MovePast TRUE makes function return 1 past the found
location.
@param[in] FindOnly TRUE to not change the ScriptFile.
@param[in] CommandNode The pointer to the Node to test.
@param[in, out] TargetCount The pointer to the current count.
**/
BOOLEAN
EFIAPI
TestNodeForMove (
IN CONST LIST_MANIP_FUNC Function,
IN CONST CHAR16 *DecrementerTag,
IN CONST CHAR16 *IncrementerTag,
IN CONST CHAR16 *Label OPTIONAL,
IN OUT SCRIPT_FILE *ScriptFile,
IN CONST BOOLEAN MovePast,
IN CONST BOOLEAN FindOnly,
IN CONST SCRIPT_COMMAND_LIST *CommandNode,
IN OUT UINTN *TargetCount
)
{
BOOLEAN Found;
CHAR16 *CommandName;
CHAR16 *CommandNameWalker;
CHAR16 *TempLocation;
Found = FALSE;
//
// get just the first part of the command line...
//
CommandName = NULL;
CommandName = StrnCatGrow(&CommandName, NULL, CommandNode->Cl, 0);
if (CommandName == NULL) {
return (FALSE);
}
CommandNameWalker = CommandName;
//
// Skip leading spaces and tabs.
//
while ((CommandNameWalker[0] == L' ') || (CommandNameWalker[0] == L'\t')) {
CommandNameWalker++;
}
TempLocation = StrStr(CommandNameWalker, L" ");
if (TempLocation != NULL) {
*TempLocation = CHAR_NULL;
}
//
// did we find a nested item ?
//
if (gUnicodeCollation->StriColl(
gUnicodeCollation,
(CHAR16*)CommandNameWalker,
(CHAR16*)IncrementerTag) == 0) {
(*TargetCount)++;
} else if (gUnicodeCollation->StriColl(
gUnicodeCollation,
(CHAR16*)CommandNameWalker,
(CHAR16*)DecrementerTag) == 0) {
if (*TargetCount > 0) {
(*TargetCount)--;
}
}
//
// did we find the matching one...
//
if (Label == NULL) {
if (*TargetCount == 0) {
Found = TRUE;
if (!FindOnly) {
if (MovePast) {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link);
} else {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)CommandNode;
}
}
}
} else {
if (gUnicodeCollation->StriColl(
gUnicodeCollation,
(CHAR16*)CommandNameWalker,
(CHAR16*)Label) == 0
&& (*TargetCount) == 0) {
Found = TRUE;
if (!FindOnly) {
//
// we found the target label without loops
//
if (MovePast) {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link);
} else {
ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)CommandNode;
}
}
}
}
//
// Free the memory for this loop...
//
FreePool(CommandName);
return (Found);
}
/**
Move the script pointer from 1 tag (line) to another.
It functions so that count starts at 1 and it increases or decreases when it
hits the specified tags. when it hits zero the location has been found.
DecrementerTag and IncrementerTag are used to get around for/endfor and
similar paired types where the entire middle should be ignored.
If label is used it will be used instead of the count.
@param[in] Function The function to use to enumerate through the
list. Normally GetNextNode or GetPreviousNode.
@param[in] DecrementerTag The tag to decrement the count at.
@param[in] IncrementerTag The tag to increment the count at.
@param[in] Label A label to look for.
@param[in, out] ScriptFile The pointer to the current script file structure.
@param[in] MovePast TRUE makes function return 1 past the found
location.
@param[in] FindOnly TRUE to not change the ScriptFile.
@param[in] WrapAroundScript TRUE to wrap end-to-begining or vise versa in
searching.
**/
BOOLEAN
EFIAPI
MoveToTag (
IN CONST LIST_MANIP_FUNC Function,
IN CONST CHAR16 *DecrementerTag,
IN CONST CHAR16 *IncrementerTag,
IN CONST CHAR16 *Label OPTIONAL,
IN OUT SCRIPT_FILE *ScriptFile,
IN CONST BOOLEAN MovePast,
IN CONST BOOLEAN FindOnly,
IN CONST BOOLEAN WrapAroundScript
)
{
SCRIPT_COMMAND_LIST *CommandNode;
BOOLEAN Found;
UINTN TargetCount;
if (Label == NULL) {
TargetCount = 1;
} else {
TargetCount = 0;
}
if (ScriptFile == NULL) {
return FALSE;
}
for (CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &ScriptFile->CurrentCommand->Link), Found = FALSE
; !IsNull(&ScriptFile->CommandList, &CommandNode->Link)&& !Found
; CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link)
){
Found = TestNodeForMove(
Function,
DecrementerTag,
IncrementerTag,
Label,
ScriptFile,
MovePast,
FindOnly,
CommandNode,
&TargetCount);
}
if (WrapAroundScript && !Found) {
for (CommandNode = (SCRIPT_COMMAND_LIST *)GetFirstNode(&ScriptFile->CommandList), Found = FALSE
; CommandNode != ScriptFile->CurrentCommand && !Found
; CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link)
){
Found = TestNodeForMove(
Function,
DecrementerTag,
IncrementerTag,
Label,
ScriptFile,
MovePast,
FindOnly,
CommandNode,
&TargetCount);
}
}
return (Found);
}
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