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Copy pathstring_ref.cpp
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125 lines (102 loc) · 3.46 KB
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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.
// This file is copied from
// https://github.com/ClickHouse/ClickHouse/blob/master/base/base/StringRef.
// And modified by Doris
#include "core/string_ref.h"
#include "common/compiler_util.h" // IWYU pragma: keep
namespace doris {
StringRef StringRef::trim() const {
// Remove leading and trailing spaces.
int64_t begin = 0;
while (begin < size && data[begin] == ' ') {
++begin;
}
int64_t end = size - 1;
while (end > begin && data[end] == ' ') {
--end;
}
return StringRef(data + begin, end - begin + 1);
}
StringRef StringRef::trim_tail_padding_zero() const {
// Remove trailing padding zero.
int64_t end = size - 1;
while (end >= 0 && data[end] == '\0') {
--end;
}
return StringRef(data, end + 1);
}
StringRef StringRef::trim_whitespace() const {
// Remove leading and trailing whitespace.
int64_t begin = 0;
while (begin < size && std::isspace(data[begin])) {
++begin;
}
int64_t end = size - 1;
while (end > begin && std::isspace(data[end])) {
--end;
}
return StringRef(data + begin, end - begin + 1);
}
StringRef StringRef::trim_quote() const {
if (size < 2) {
return *this;
}
if (data[0] == '\'' && data[size - 1] == '\'') {
return StringRef(data + 1, size - 2);
} else if (data[0] == '"' && data[size - 1] == '"') {
return StringRef(data + 1, size - 2);
}
return *this;
}
// TODO: rewrite in AVX2
size_t StringRef::find_first_of(char c) const {
const char* p = static_cast<const char*>(memchr(data, c, size));
return p == nullptr ? -1 : p - data;
}
StringRef StringRef::min_string_val() {
return StringRef((char*)(&StringRef::MIN_CHAR), 0);
}
StringRef StringRef::max_string_val() {
return StringRef((char*)(&StringRef::MAX_CHAR), 1);
}
bool StringRef::start_with(const StringRef& search_string) const {
if (search_string.size == 0) {
return true;
}
if (UNLIKELY(size < search_string.size)) {
return false;
}
#if defined(__SSE2__) || defined(__aarch64__)
return memequalSSE2Wide(data, search_string.data, search_string.size);
#else
return 0 == memcmp(data, search_string.data, search_string.size);
#endif
}
bool StringRef::end_with(const StringRef& search_string) const {
DCHECK(size >= search_string.size);
if (search_string.size == 0) {
return true;
}
#if defined(__SSE2__) || defined(__aarch64__)
return memequalSSE2Wide(data + size - search_string.size, search_string.data,
search_string.size);
#else
return 0 == memcmp(data + size - search_string.size, search_string.data, search_string.size);
#endif
}
} // namespace doris