wehub-resource-sync
121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
/* Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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#pragma once
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#include <algorithm>
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#include <vector>
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#include "paddle/phi/api/lib/utils/allocator.h"
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#include "paddle/phi/core/string_tensor.h"
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#include "paddle/phi/infermeta/strings/unary.h"
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#include "paddle/phi/kernels/strings/case_utils.h"
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namespace phi {
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namespace strings {
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template <typename ContextT>
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void StringLowerKernel(const ContextT& dev_ctx,
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const StringTensor& x,
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bool use_utf8_encoding,
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StringTensor* out);
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template <typename ContextT>
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void StringUpperKernel(const ContextT& dev_ctx,
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const StringTensor& x,
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bool use_utf8_encoding,
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StringTensor* out);
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template <typename ContextT>
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StringTensor StringLower(const ContextT& dev_ctx,
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const StringTensor& x,
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bool use_utf8_encoding) {
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StringTensor string_out;
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MetaTensor meta_out(&string_out);
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UnchangedInferMeta(x.meta(), &meta_out);
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StringLowerKernel(dev_ctx, x, use_utf8_encoding, &string_out);
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return string_out;
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}
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template <typename ContextT>
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StringTensor StringUpper(const ContextT& dev_ctx,
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const StringTensor& x,
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bool use_utf8_encoding) {
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StringTensor string_out;
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MetaTensor meta_out(&string_out);
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UnchangedInferMeta(x.meta(), &meta_out);
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StringUpperKernel(dev_ctx, x, use_utf8_encoding, &string_out);
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return string_out;
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}
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template <typename AsciiConverter, typename UTF8Converter, typename ContextT>
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struct StringCaseConvertKernel {
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void operator()(const ContextT& dev_ctx,
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const StringTensor& x,
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bool use_utf8_encoding,
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StringTensor* out) {
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AsciiConverter ascii_converter;
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UTF8Converter utf8_converter;
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const pstring* in_ptr = x.data();
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pstring* out_ptr = dev_ctx.template Alloc<pstring>(out);
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auto num = x.numel();
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if (!use_utf8_encoding) {
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ascii_converter(dev_ctx, in_ptr, out_ptr, num);
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} else {
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utf8_converter(dev_ctx, in_ptr, out_ptr, num);
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}
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}
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};
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template <typename DeviceContext, typename CharConverter>
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struct AsciiCaseConverter {
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void operator()(const DeviceContext& dev_ctx UNUSED,
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const pstring* in,
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pstring* out,
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size_t num) const {
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for (size_t i = 0; i < num; ++i) {
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std::transform(
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in[i].begin(), in[i].end(), out[i].mdata(), CharConverter());
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}
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}
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};
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template <typename DeviceContext,
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template <typename DeviceContextT>
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class CharConverter>
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struct UTF8CaseConverter {
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void operator()(const DeviceContext& dev_ctx UNUSED,
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const pstring* in,
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pstring* out,
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size_t num) const {
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auto unicode_flag_map = GetUniFlagMap();
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auto cases_map = GetCharCasesMap();
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for (size_t i = 0; i < num; ++i) {
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uint32_t unicode_len = GetUnicodeStrLen(in[i].data(), in[i].size());
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std::vector<uint32_t> unicode_in(unicode_len, 0);
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GetUnicodeStr(in[i].data(), unicode_in.data(), unicode_len);
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std::transform(unicode_in.begin(),
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unicode_in.end(),
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unicode_in.begin(),
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CharConverter<DeviceContext>(unicode_flag_map, cases_map));
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uint32_t utf8_len = GetUTF8StrLen(unicode_in.data(), unicode_len);
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std::vector<char> result(utf8_len, 0);
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GetUTF8Str(unicode_in.data(), result.data(), unicode_len);
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out[i] = result.data();
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}
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}
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};
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} // namespace strings
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} // namespace phi
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