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paddlepaddle--paddle/paddle/utils/string/string_helper.cc
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2026-07-13 12:40:42 +08:00

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// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
//
// 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 "paddle/utils/string/string_helper.h"
#include <cctype>
#include <cstdio>
#include <cstring>
#include <string>
namespace paddle::string {
// remove leading and tailing spaces
std::string trim_spaces(const std::string& str) {
const char* p = str.c_str();
while (*p != 0 && isspace(*p)) {
p++;
}
size_t len = strlen(p);
while (len > 0 && isspace(p[len - 1])) {
len--;
}
return std::string(p, len);
}
std::string erase_spaces(const std::string& str) {
std::string result;
result.reserve(str.size());
const char* p = str.c_str();
while (*p != 0) {
if (!isspace(*p)) {
result.append(p, 1);
}
++p;
}
return result;
}
bool ends_with(std::string const& input, std::string const& test) {
if (test.size() > input.size()) return false;
return std::equal(test.rbegin(), test.rend(), input.rbegin());
}
// A helper class for reading lines from file.
// A line buffer is maintained. It
// doesn't need to know the maximum possible length of a line.
char* LineFileReader::getdelim(FILE* f, char delim) {
#ifndef _WIN32
int32_t ret =
static_cast<int32_t>(::getdelim(&_buffer, &_buf_size, delim, f));
if (ret >= 0) {
if (ret >= 1 && _buffer[ret - 1] == delim) {
_buffer[--ret] = 0;
}
_length = static_cast<size_t>(ret);
return _buffer;
} else {
_length = 0;
int code = feof(f);
(void)code;
assert(code);
return nullptr;
}
#else
return NULL;
#endif
}
} // namespace paddle::string