blob: aab47b1e30261519d2cb274defb24a6bec843644 [file] [log] [blame]
/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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
*
* http://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.
*/
#include "perfetto/base/string_splitter.h"
#include <utility>
#include "perfetto/base/logging.h"
namespace perfetto {
namespace base {
StringSplitter::StringSplitter(std::string str, char delimiter)
: str_(std::move(str)), delimiter_(delimiter) {
// It's legal to access str[str.size()] in C++11 (it always returns \0),
// hence the +1 (which becomes just size() after the -1 in Initialize()).
Initialize(&str_[0], str_.size() + 1);
}
StringSplitter::StringSplitter(char* str, size_t size, char delimiter)
: delimiter_(delimiter) {
Initialize(str, size);
}
StringSplitter::StringSplitter(StringSplitter* outer, char delimiter)
: delimiter_(delimiter) {
Initialize(outer->cur_token(), outer->cur_token_size() + 1);
}
void StringSplitter::Initialize(char* str, size_t size) {
PERFETTO_DCHECK(!size || str);
next_ = str;
end_ = str + size;
cur_ = nullptr;
cur_size_ = 0;
if (size)
next_[size - 1] = '\0';
}
bool StringSplitter::Next() {
for (; next_ < end_; next_++) {
if (*next_ == delimiter_)
continue;
cur_ = next_;
for (;; next_++) {
if (*next_ == delimiter_) {
cur_size_ = static_cast<size_t>(next_ - cur_);
*(next_++) = '\0';
break;
}
if (*next_ == '\0') {
cur_size_ = static_cast<size_t>(next_ - cur_);
next_ = end_;
break;
}
}
if (*cur_)
return true;
break;
}
cur_ = nullptr;
cur_size_ = 0;
return false;
}
} // namespace base
} // namespace perfetto