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author | Vincent Ambo <tazjin@google.com> | 2020-05-20T01·32+0100 |
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committer | Vincent Ambo <tazjin@google.com> | 2020-05-20T01·32+0100 |
commit | fc8dc48020ac5b52731d0828a96ea4d2526c77ba (patch) | |
tree | 353204eea3268095a9ad3f5345720f32c2615c69 /third_party/abseil_cpp/absl/strings/internal/utf8.cc | |
parent | ffb2ae54beb5796cd408fbe15d2d2da09ff37adf (diff) | |
parent | 768eb2ca2857342673fcd462792ce04b8bac3fa3 (diff) |
Add 'third_party/abseil_cpp/' from commit '768eb2ca2857342673fcd462792ce04b8bac3fa3' r/781
git-subtree-dir: third_party/abseil_cpp git-subtree-mainline: ffb2ae54beb5796cd408fbe15d2d2da09ff37adf git-subtree-split: 768eb2ca2857342673fcd462792ce04b8bac3fa3
Diffstat (limited to 'third_party/abseil_cpp/absl/strings/internal/utf8.cc')
-rw-r--r-- | third_party/abseil_cpp/absl/strings/internal/utf8.cc | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/strings/internal/utf8.cc b/third_party/abseil_cpp/absl/strings/internal/utf8.cc new file mode 100644 index 000000000000..8fd8edc1ec6f --- /dev/null +++ b/third_party/abseil_cpp/absl/strings/internal/utf8.cc @@ -0,0 +1,53 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// UTF8 utilities, implemented to reduce dependencies. + +#include "absl/strings/internal/utf8.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace strings_internal { + +size_t EncodeUTF8Char(char *buffer, char32_t utf8_char) { + if (utf8_char <= 0x7F) { + *buffer = static_cast<char>(utf8_char); + return 1; + } else if (utf8_char <= 0x7FF) { + buffer[1] = 0x80 | (utf8_char & 0x3F); + utf8_char >>= 6; + buffer[0] = 0xC0 | utf8_char; + return 2; + } else if (utf8_char <= 0xFFFF) { + buffer[2] = 0x80 | (utf8_char & 0x3F); + utf8_char >>= 6; + buffer[1] = 0x80 | (utf8_char & 0x3F); + utf8_char >>= 6; + buffer[0] = 0xE0 | utf8_char; + return 3; + } else { + buffer[3] = 0x80 | (utf8_char & 0x3F); + utf8_char >>= 6; + buffer[2] = 0x80 | (utf8_char & 0x3F); + utf8_char >>= 6; + buffer[1] = 0x80 | (utf8_char & 0x3F); + utf8_char >>= 6; + buffer[0] = 0xF0 | utf8_char; + return 4; + } +} + +} // namespace strings_internal +ABSL_NAMESPACE_END +} // namespace absl |