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