98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
/* Copyright 2017 The TensorFlow 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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==============================================================================*/
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#include "tensorflow/lite/testing/tokenize.h"
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#include <istream>
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#include <string>
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#include "tensorflow/lite/string_type.h"
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namespace tflite {
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namespace testing {
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void Tokenize(std::istream* input, TokenProcessor* processor) {
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enum State { kBuildQuotedToken, kBuildToken, kIdle };
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std::string current_token;
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State state = kIdle;
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auto start_token = [&](char c) {
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state = kBuildToken;
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current_token.clear();
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current_token = c;
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};
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auto issue_token = [&]() {
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state = kIdle;
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processor->ConsumeToken(¤t_token);
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current_token.clear();
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};
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auto start_quoted_token = [&]() {
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state = kBuildQuotedToken;
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current_token.clear();
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};
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auto issue_quoted_token = [&]() {
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state = kIdle;
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processor->ConsumeToken(¤t_token);
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current_token.clear();
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};
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auto issue_delim = [&](char d) {
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current_token = string(1, d);
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processor->ConsumeToken(¤t_token);
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current_token.clear();
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};
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auto is_delim = [](char c) { return c == '{' || c == '}' || c == ':'; };
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auto is_quote = [](char c) { return c == '"'; };
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for (auto it = std::istreambuf_iterator<char>(*input);
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it != std::istreambuf_iterator<char>(); ++it) {
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switch (state) {
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case kIdle:
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if (is_delim(*it)) {
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issue_delim(*it);
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} else if (is_quote(*it)) {
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start_quoted_token();
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} else if (!isspace(*it)) {
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start_token(*it);
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}
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break;
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case kBuildToken:
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if (is_delim(*it)) {
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issue_token();
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issue_delim(*it);
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} else if (is_quote(*it)) {
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issue_token();
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start_quoted_token();
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} else if (isspace(*it)) {
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issue_token();
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} else {
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current_token += *it;
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}
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break;
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case kBuildQuotedToken:
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if (is_quote(*it)) {
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issue_quoted_token();
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} else {
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current_token += *it;
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}
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break;
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}
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}
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if (state != kIdle) {
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issue_token();
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}
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}
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} // namespace testing
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} // namespace tflite
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