From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- mfbt/Utf8.cpp | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 mfbt/Utf8.cpp (limited to 'mfbt/Utf8.cpp') diff --git a/mfbt/Utf8.cpp b/mfbt/Utf8.cpp new file mode 100644 index 0000000000..1a10c7a011 --- /dev/null +++ b/mfbt/Utf8.cpp @@ -0,0 +1,38 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/Maybe.h" +#include "mozilla/TextUtils.h" +#include "mozilla/Types.h" +#include "mozilla/Utf8.h" + +#include +#include + +MFBT_API bool mozilla::detail::IsValidUtf8(const void* aCodeUnits, + size_t aCount) { + const auto* s = reinterpret_cast(aCodeUnits); + const auto* const limit = s + aCount; + + while (s < limit) { + unsigned char c = *s++; + + // If the first byte is ASCII, it's the only one in the code point. Have a + // fast path that avoids all the rest of the work and looping in that case. + if (IsAscii(c)) { + continue; + } + + Maybe maybeCodePoint = + DecodeOneUtf8CodePoint(Utf8Unit(c), &s, limit); + if (maybeCodePoint.isNothing()) { + return false; + } + } + + MOZ_ASSERT(s == limit); + return true; +} -- cgit v1.2.3