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d04c54e178
Will be used to make a suggestion when enums fail to parse. Bug: tint:1629 Change-Id: Ia2754f86641f752539fa541ddb6b90b4e200f07c Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/105320 Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
// Copyright 2022 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <algorithm>
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#include "src/tint/utils/string.h"
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#include "src/tint/utils/vector.h"
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namespace tint::utils {
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size_t Distance(const std::string& str_a, const std::string& str_b) {
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const auto len_a = str_a.size();
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const auto len_b = str_b.size();
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Vector<size_t, 64> mat;
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mat.Reserve((len_a + 1) * (len_b + 1));
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auto at = [&](size_t a, size_t b) -> size_t& { return mat[a + b * (len_a + 1)]; };
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at(0, 0) = 0;
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for (size_t a = 1; a <= len_a; a++) {
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at(a, 0) = a;
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}
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for (size_t b = 1; b <= len_b; b++) {
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at(0, b) = b;
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}
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for (size_t b = 1; b <= len_b; b++) {
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for (size_t a = 1; a <= len_a; a++) {
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bool eq = str_a[a - 1] == str_b[b - 1];
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at(a, b) = std::min({
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at(a - 1, b) + 1,
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at(a, b - 1) + 1,
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at(a - 1, b - 1) + (eq ? 0 : 1),
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});
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}
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}
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return at(len_a, len_b);
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}
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} // namespace tint::utils
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