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<title>Tianocore/edk2.git/MdePkg/Include/Protocol/SimpleTextOut.h, branch master</title>
<subtitle>EDK II (mirror)</subtitle>
<id>https://git.radix-linux.su/Tianocore/edk2.git/atom?h=master</id>
<link rel='self' href='https://git.radix-linux.su/Tianocore/edk2.git/atom?h=master'/>
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<updated>2026-02-23T21:01:28+00:00</updated>
<entry>
<title>MdePkg: Replace include guards with #pragma once</title>
<updated>2026-02-23T21:01:28+00:00</updated>
<author>
<name>Michael Kubacki</name>
<email>michael.kubacki@microsoft.com</email>
</author>
<published>2026-02-03T18:54:32+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/Tianocore/edk2.git/commit/?id=7835e5802a2a70984333c054002e449bfd1f0a0d'/>
<id>urn:sha1:7835e5802a2a70984333c054002e449bfd1f0a0d</id>
<content type='text'>
Replace traditional `#ifndef`/`#define`/`#endif` include guards with
`#pragma` once.

`#pragma once` is a widely supported preprocessor directive that
prevents header files from being included multiple times. It is
supported by all toolchains used to build edk2: GCC, Clang/LLVM, and
MSVC.

Compared to macro-based include guards, `#pragma once`:

- Eliminates the risk of macro name collisions or copy/paste errors
  where two headers inadvertently use the same guard macro.
- Eliminate inconsistency in the way include guard macros are named
  (e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.).
- Reduces boilerplate (three lines replaced by one).
- Avoids polluting the macro namespace with guard symbols.
- Can improve build times as the preprocessor can skip re-opening the
  file entirely, rather than re-reading it to find the matching
  `#endif` ("multiple-include optimization").
  - Note that some compilers may already optimize traditional include
    guards, by recognzining the idiomatic pattern.

This change is made acknowledging that overall portability of the
code will technically be reduced, as `#pragma once` is not part of the
C/C++ standards.

However, this is considered acceptable given:

1. edk2 already defines a subset of supported compilers in
   BaseTools/Conf/tools_def.template, all of which have supported
   `#pragma once` for over two decades.
2. There have been concerns raised to the project about inconsistent
   include guard naming and potential macro collisions.

Approximate compiler support dates:

- MSVC: Supported since Visual C++ 4.2 (1996)
- GCC: Supported since 3.4 (2004)
  (http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html)
- Clang (LLVM based): Since initial release in 2007

Signed-off-by: Michael Kubacki &lt;michael.kubacki@microsoft.com&gt;
</content>
</entry>
<entry>
<title>MdePkg: Apply uncrustify changes</title>
<updated>2021-12-07T17:24:28+00:00</updated>
<author>
<name>Michael Kubacki</name>
<email>michael.kubacki@microsoft.com</email>
</author>
<published>2021-12-05T22:54:05+00:00</published>
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<id>urn:sha1:2f88bd3a1296c522317f1c21377876de63de5be7</id>
<content type='text'>
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737

Apply uncrustify changes to .c/.h files in the MdePkg package

Cc: Andrew Fish &lt;afish@apple.com&gt;
Cc: Leif Lindholm &lt;leif@nuviainc.com&gt;
Cc: Michael D Kinney &lt;michael.d.kinney@intel.com&gt;
Signed-off-by: Michael Kubacki &lt;michael.kubacki@microsoft.com&gt;
Reviewed-by: Liming Gao &lt;gaoliming@byosoft.com.cn&gt;
</content>
</entry>
<entry>
<title>MdeModulePkg/Graphics: Fix spelling mistakes</title>
<updated>2021-01-06T05:27:29+00:00</updated>
<author>
<name>Samer El-Haj-Mahmoud</name>
<email>Samer.El-Haj-Mahmoud@arm.com</email>
</author>
<published>2020-12-20T13:53:54+00:00</published>
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<id>urn:sha1:e61088c858640845a87248401022d281e99df364</id>
<content type='text'>
Fix various spelling mistakes in GraphicsConsoleDxe, ConsPlitter,
and SimpleTextOut header

Cc: Jian J Wang &lt;jian.j.wang@intel.com&gt;
Cc: Hao A Wu &lt;hao.a.wu@intel.com&gt;
Cc: Zhichao Gao &lt;zhichao.gao@intel.com&gt;
Cc: Ray Ni &lt;ray.ni@intel.com&gt;
Cc: Ard Biesheuvel &lt;Ard.Biesheuvel@arm.com&gt;
Cc: Pete Batard &lt;pete@akeo.ie&gt;
Signed-off-by: Samer El-Haj-Mahmoud &lt;Samer.El-Haj-Mahmoud@arm.com&gt;
Reviewed-by: Zhichao Gao &lt;zhichao.gao@intel.com&gt;
</content>
</entry>
<entry>
<title>MdePkg: Replace BSD License with BSD+Patent License</title>
<updated>2019-04-09T17:58:13+00:00</updated>
<author>
<name>Michael D Kinney</name>
<email>michael.d.kinney@intel.com</email>
</author>
<published>2019-04-03T23:06:00+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/Tianocore/edk2.git/commit/?id=9344f0921518309295da89c221d10cbead8531aa'/>
<id>urn:sha1:9344f0921518309295da89c221d10cbead8531aa</id>
<content type='text'>
https://bugzilla.tianocore.org/show_bug.cgi?id=1373

Replace BSD 2-Clause License with BSD+Patent License.  This change is
based on the following emails:

  https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
  https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html

RFCs with detailed process for the license change:

  V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
  V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
  V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney &lt;michael.d.kinney@intel.com&gt;
Reviewed-by: Liming Gao &lt;liming.gao@intel.com&gt;
</content>
</entry>
<entry>
<title>MdePkg: Clean up source files</title>
<updated>2018-06-28T03:19:47+00:00</updated>
<author>
<name>Liming Gao</name>
<email>liming.gao@intel.com</email>
</author>
<published>2018-06-27T13:11:33+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/Tianocore/edk2.git/commit/?id=9095d37b8fe5bfc3d02adad6ba7fd7359ebc0107'/>
<id>urn:sha1:9095d37b8fe5bfc3d02adad6ba7fd7359ebc0107</id>
<content type='text'>
1. Do not use tab characters
2. No trailing white space in one line
3. All files must end with CRLF

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao &lt;liming.gao@intel.com&gt;
</content>
</entry>
<entry>
<title>MdePkg: Fix some typing errors in the header files</title>
<updated>2016-10-08T01:09:09+00:00</updated>
<author>
<name>Thomas Huth</name>
<email>thuth@redhat.com</email>
</author>
<published>2016-09-12T08:35:39+00:00</published>
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<id>urn:sha1:00b7cc0fe327fcd00d70a8d30f16245cca0c55f2</id>
<content type='text'>
Correct the typos in some header files of MdePkg.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Thomas Huth &lt;thuth@redhat.com&gt;
Reviewed-by: Liming Gao &lt;liming.gao@intel.com&gt;
Reviewed-by: Michael Kinney &lt;michael.d.kinney@intel.com&gt;
</content>
</entry>
<entry>
<title>MdePkg: Refine EFI_DARKGRAY definition and comments for EFI_TEXT_ATTR</title>
<updated>2015-05-08T07:29:18+00:00</updated>
<author>
<name>Ruiyu Ni</name>
<email>ruiyu.ni@intel.com</email>
</author>
<published>2015-05-08T07:29:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.radix-linux.su/Tianocore/edk2.git/commit/?id=0cccafeacb6e751d68f288530f33d34708bef376'/>
<id>urn:sha1:0cccafeacb6e751d68f288530f33d34708bef376</id>
<content type='text'>
It's to follow UEFI spec 2.5.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni &lt;ruiyu.ni@intel.com&gt;
Reviewed-by: Eric Jin &lt;eric.jin@intel.com&gt;

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17366 6f19259b-4bc3-4df7-8a09-765794883524
</content>
</entry>
<entry>
<title>Update the copyright notice format</title>
<updated>2010-04-23T15:46:20+00:00</updated>
<author>
<name>hhtian</name>
<email>hhtian@6f19259b-4bc3-4df7-8a09-765794883524</email>
</author>
<published>2010-04-23T15:46:20+00:00</published>
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<id>urn:sha1:9df063a06aef048c042498e2f542fb693e93493a</id>
<content type='text'>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10403 6f19259b-4bc3-4df7-8a09-765794883524
</content>
</entry>
<entry>
<title>Grammatical and disclaimer changes (does not follow internal C coding stds.)</title>
<updated>2010-03-12T22:19:12+00:00</updated>
<author>
<name>myronporter</name>
<email>myronporter@6f19259b-4bc3-4df7-8a09-765794883524</email>
</author>
<published>2010-03-12T22:19:12+00:00</published>
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<id>urn:sha1:af2dc6a70b9380d702bd0720cdb029d630c505e3</id>
<content type='text'>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10235 6f19259b-4bc3-4df7-8a09-765794883524
</content>
</entry>
<entry>
<title>sync comments on data structure to follow latest UEFI spec.</title>
<updated>2009-09-24T08:56:33+00:00</updated>
<author>
<name>eric_tian</name>
<email>eric_tian@6f19259b-4bc3-4df7-8a09-765794883524</email>
</author>
<published>2009-09-24T08:56:33+00:00</published>
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<id>urn:sha1:fbf926add92ee7c528aed264b0b71442b2caef04</id>
<content type='text'>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9309 6f19259b-4bc3-4df7-8a09-765794883524
</content>
</entry>
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