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Userland: Change static const variables to static constexpr

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`static const` variables can be computed and initialized at run-time
during initialization or the first time a function is called. Change
them to `static constexpr` to ensure they are computed at
compile-time.

This allows some removal of `strlen` because the length of the
`StringView` can be used which is pre-computed at compile-time.
This commit is contained in:
Lenny Maiorani 2022-03-13 16:09:41 -06:00 • committed by Andreas Kling
parent 31515a9147
commit f912a48315
23 changed files with 111 additions and 82 deletions
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6
Userland/Libraries/LibGfx/PNGLoader.cpp
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@ -1,9 +1,11 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Array.h>
#include <AK/Debug.h>
#include <AK/Endian.h>
#include <AK/Vector.h>
@ -17,7 +19,7 @@
namespace Gfx {
static const u8 png_header[8] = { 0x89, 'P', 'N', 'G', 13, 10, 26, 10 };
static constexpr Array<u8, 8> png_header = { 0x89, 'P', 'N', 'G', 13, 10, 26, 10 };
struct PNG_IHDR {
NetworkOrdered<u32> width;
@ -516,7 +518,7 @@ static bool decode_png_header(PNGLoadingContext& context)
return false;
}
if (memcmp(context.data, png_header, sizeof(png_header)) != 0) {
if (memcmp(context.data, png_header.span().data(), sizeof(png_header)) != 0) {
dbgln_if(PNG_DEBUG, "Invalid PNG header");
context.state = PNGLoadingContext::State::Error;
return false;