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source: vbox/trunk/src/VBox/Devices/EFI/Firmware/ShellPkg/Library/UefiShellLevel1CommandsLib/UefiShellLevel1CommandsLib.c@ 75265

Last change on this file since 75265 was 58466, checked in by vboxsync, 9 years ago

EFI/Firmware: Merged in the svn:eol-style, svn:mime-type and trailing whitespace cleanup that was done after the initial UDK2014.SP1 import: svn merge /vendor/edk2/UDK2014.SP1 /vendor/edk2/current .
  • Property svn:eol-style set to native
File size: 10.8 KB
Line 
1/** @file
2 Main file for NULL named library for level 1 shell command functions.
3
4 Copyright (c) 2013, Hewlett-Packard Development Company, L.P.
5 Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14**/
15
16#include "UefiShellLevel1CommandsLib.h"
17
18STATIC CONST CHAR16 mFileName[] = L"ShellCommands";
19EFI_HANDLE gShellLevel1HiiHandle = NULL;
20
21/**
22 Return the help text filename. Only used if no HII information found.
23
24 @retval the filename.
25**/
26CONST CHAR16*
27EFIAPI
28ShellCommandGetManFileNameLevel1 (
29 VOID
30 )
31{
32 return (mFileName);
33}
34
35/**
36 Constructor for the Shell Level 1 Commands library.
37
38 Install the handlers for level 1 UEFI Shell 2.0 commands.
39
40 @param ImageHandle the image handle of the process
41 @param SystemTable the EFI System Table pointer
42
43 @retval EFI_SUCCESS the shell command handlers were installed sucessfully
44 @retval EFI_UNSUPPORTED the shell level required was not found.
45**/
46EFI_STATUS
47EFIAPI
48ShellLevel1CommandsLibConstructor (
49 IN EFI_HANDLE ImageHandle,
50 IN EFI_SYSTEM_TABLE *SystemTable
51 )
52{
53 //
54 // if shell level is less than 2 do nothing
55 //
56 if (PcdGet8(PcdShellSupportLevel) < 1) {
57 return (EFI_SUCCESS);
58 }
59
60 gShellLevel1HiiHandle = HiiAddPackages (&gShellLevel1HiiGuid, gImageHandle, UefiShellLevel1CommandsLibStrings, NULL);
61 if (gShellLevel1HiiHandle == NULL) {
62 return (EFI_DEVICE_ERROR);
63 }
64
65 //
66 // install our shell command handlers that are always installed
67 //
68 ShellCommandRegisterCommandName(L"stall", ShellCommandRunStall , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_STALL) ));
69 ShellCommandRegisterCommandName(L"for", ShellCommandRunFor , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_FOR) ));
70 ShellCommandRegisterCommandName(L"goto", ShellCommandRunGoto , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_GOTO) ));
71 ShellCommandRegisterCommandName(L"if", ShellCommandRunIf , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_IF) ));
72 ShellCommandRegisterCommandName(L"shift", ShellCommandRunShift , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_SHIFT) ));
73 ShellCommandRegisterCommandName(L"exit", ShellCommandRunExit , ShellCommandGetManFileNameLevel1, 1, L"", TRUE , gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_EXIT) ));
74 ShellCommandRegisterCommandName(L"else", ShellCommandRunElse , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_ELSE) ));
75 ShellCommandRegisterCommandName(L"endif", ShellCommandRunEndIf , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_ENDIF) ));
76 ShellCommandRegisterCommandName(L"endfor", ShellCommandRunEndFor , ShellCommandGetManFileNameLevel1, 1, L"", FALSE, gShellLevel1HiiHandle, (EFI_STRING_ID)(PcdGet8(PcdShellSupportLevel) < 3 ? 0 : STRING_TOKEN(STR_GET_HELP_ENDFOR)));
77
78 return (EFI_SUCCESS);
79}
80
81/**
82 Destructor for the library. free any resources.
83
84 @param ImageHandle The image handle of the process.
85 @param SystemTable The EFI System Table pointer.
86**/
87EFI_STATUS
88EFIAPI
89ShellLevel1CommandsLibDestructor (
90 IN EFI_HANDLE ImageHandle,
91 IN EFI_SYSTEM_TABLE *SystemTable
92 )
93{
94 if (gShellLevel1HiiHandle != NULL) {
95 HiiRemovePackages(gShellLevel1HiiHandle);
96 }
97 return (EFI_SUCCESS);
98}
99
100/**
101 Test a node to see if meets the criterion.
102
103 It functions so that count starts at 1 and it increases or decreases when it
104 hits the specified tags. when it hits zero the location has been found.
105
106 DecrementerTag and IncrementerTag are used to get around for/endfor and
107 similar paired types where the entire middle should be ignored.
108
109 If label is used it will be used instead of the count.
110
111 @param[in] Function The function to use to enumerate through the
112 list. Normally GetNextNode or GetPreviousNode.
113 @param[in] DecrementerTag The tag to decrement the count at.
114 @param[in] IncrementerTag The tag to increment the count at.
115 @param[in] Label A label to look for.
116 @param[in, out] ScriptFile The pointer to the current script file structure.
117 @param[in] MovePast TRUE makes function return 1 past the found
118 location.
119 @param[in] FindOnly TRUE to not change the ScriptFile.
120 @param[in] CommandNode The pointer to the Node to test.
121 @param[in, out] TargetCount The pointer to the current count.
122**/
123BOOLEAN
124EFIAPI
125TestNodeForMove (
126 IN CONST LIST_MANIP_FUNC Function,
127 IN CONST CHAR16 *DecrementerTag,
128 IN CONST CHAR16 *IncrementerTag,
129 IN CONST CHAR16 *Label OPTIONAL,
130 IN OUT SCRIPT_FILE *ScriptFile,
131 IN CONST BOOLEAN MovePast,
132 IN CONST BOOLEAN FindOnly,
133 IN CONST SCRIPT_COMMAND_LIST *CommandNode,
134 IN OUT UINTN *TargetCount
135 )
136{
137 BOOLEAN Found;
138 CHAR16 *CommandName;
139 CHAR16 *CommandNameWalker;
140 CHAR16 *TempLocation;
141
142 Found = FALSE;
143
144 //
145 // get just the first part of the command line...
146 //
147 CommandName = NULL;
148 CommandName = StrnCatGrow(&CommandName, NULL, CommandNode->Cl, 0);
149 if (CommandName == NULL) {
150 return (FALSE);
151 }
152
153 CommandNameWalker = CommandName;
154
155 //
156 // Skip leading spaces and tabs.
157 //
158 while ((CommandNameWalker[0] == L' ') || (CommandNameWalker[0] == L'\t')) {
159 CommandNameWalker++;
160 }
161 TempLocation = StrStr(CommandNameWalker, L" ");
162
163 if (TempLocation != NULL) {
164 *TempLocation = CHAR_NULL;
165 }
166
167 //
168 // did we find a nested item ?
169 //
170 if (gUnicodeCollation->StriColl(
171 gUnicodeCollation,
172 (CHAR16*)CommandNameWalker,
173 (CHAR16*)IncrementerTag) == 0) {
174 (*TargetCount)++;
175 } else if (gUnicodeCollation->StriColl(
176 gUnicodeCollation,
177 (CHAR16*)CommandNameWalker,
178 (CHAR16*)DecrementerTag) == 0) {
179 if (*TargetCount > 0) {
180 (*TargetCount)--;
181 }
182 }
183
184 //
185 // did we find the matching one...
186 //
187 if (Label == NULL) {
188 if (*TargetCount == 0) {
189 Found = TRUE;
190 if (!FindOnly) {
191 if (MovePast) {
192 ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link);
193 } else {
194 ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)CommandNode;
195 }
196 }
197 }
198 } else {
199 if (gUnicodeCollation->StriColl(
200 gUnicodeCollation,
201 (CHAR16*)CommandNameWalker,
202 (CHAR16*)Label) == 0
203 && (*TargetCount) == 0) {
204 Found = TRUE;
205 if (!FindOnly) {
206 //
207 // we found the target label without loops
208 //
209 if (MovePast) {
210 ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link);
211 } else {
212 ScriptFile->CurrentCommand = (SCRIPT_COMMAND_LIST *)CommandNode;
213 }
214 }
215 }
216 }
217
218 //
219 // Free the memory for this loop...
220 //
221 FreePool(CommandName);
222 return (Found);
223}
224
225/**
226 Move the script pointer from 1 tag (line) to another.
227
228 It functions so that count starts at 1 and it increases or decreases when it
229 hits the specified tags. when it hits zero the location has been found.
230
231 DecrementerTag and IncrementerTag are used to get around for/endfor and
232 similar paired types where the entire middle should be ignored.
233
234 If label is used it will be used instead of the count.
235
236 @param[in] Function The function to use to enumerate through the
237 list. Normally GetNextNode or GetPreviousNode.
238 @param[in] DecrementerTag The tag to decrement the count at.
239 @param[in] IncrementerTag The tag to increment the count at.
240 @param[in] Label A label to look for.
241 @param[in, out] ScriptFile The pointer to the current script file structure.
242 @param[in] MovePast TRUE makes function return 1 past the found
243 location.
244 @param[in] FindOnly TRUE to not change the ScriptFile.
245 @param[in] WrapAroundScript TRUE to wrap end-to-begining or vise versa in
246 searching.
247**/
248BOOLEAN
249EFIAPI
250MoveToTag (
251 IN CONST LIST_MANIP_FUNC Function,
252 IN CONST CHAR16 *DecrementerTag,
253 IN CONST CHAR16 *IncrementerTag,
254 IN CONST CHAR16 *Label OPTIONAL,
255 IN OUT SCRIPT_FILE *ScriptFile,
256 IN CONST BOOLEAN MovePast,
257 IN CONST BOOLEAN FindOnly,
258 IN CONST BOOLEAN WrapAroundScript
259 )
260{
261 SCRIPT_COMMAND_LIST *CommandNode;
262 BOOLEAN Found;
263 UINTN TargetCount;
264
265 if (Label == NULL) {
266 TargetCount = 1;
267 } else {
268 TargetCount = 0;
269 }
270
271 if (ScriptFile == NULL) {
272 return FALSE;
273 }
274
275 for (CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &ScriptFile->CurrentCommand->Link), Found = FALSE
276 ; !IsNull(&ScriptFile->CommandList, &CommandNode->Link)&& !Found
277 ; CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link)
278 ){
279 Found = TestNodeForMove(
280 Function,
281 DecrementerTag,
282 IncrementerTag,
283 Label,
284 ScriptFile,
285 MovePast,
286 FindOnly,
287 CommandNode,
288 &TargetCount);
289 }
290
291 if (WrapAroundScript && !Found) {
292 for (CommandNode = (SCRIPT_COMMAND_LIST *)GetFirstNode(&ScriptFile->CommandList), Found = FALSE
293 ; CommandNode != ScriptFile->CurrentCommand && !Found
294 ; CommandNode = (SCRIPT_COMMAND_LIST *)(*Function)(&ScriptFile->CommandList, &CommandNode->Link)
295 ){
296 Found = TestNodeForMove(
297 Function,
298 DecrementerTag,
299 IncrementerTag,
300 Label,
301 ScriptFile,
302 MovePast,
303 FindOnly,
304 CommandNode,
305 &TargetCount);
306 }
307 }
308 return (Found);
309}
310
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