1// Copyright 2015 The Weave Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include <string.h>
6#include <algorithm>
7#include <utility>
8
9#include <base/strings/string_util.h>
10
11#include "src/string_utils.h"
12
13namespace weave {
14
15namespace {
16
17bool SplitAtFirst(const std::string& str,
18                  const std::string& delimiter,
19                  std::string* left_part,
20                  std::string* right_part,
21                  bool trim_whitespaces) {
22  bool delimiter_found = false;
23  std::string::size_type pos = str.find(delimiter);
24  if (pos != std::string::npos) {
25    *left_part = str.substr(0, pos);
26    *right_part = str.substr(pos + delimiter.size());
27    delimiter_found = true;
28  } else {
29    *left_part = str;
30    right_part->clear();
31  }
32
33  if (trim_whitespaces) {
34    base::TrimWhitespaceASCII(*left_part, base::TRIM_ALL, left_part);
35    base::TrimWhitespaceASCII(*right_part, base::TRIM_ALL, right_part);
36  }
37
38  return delimiter_found;
39}
40
41}  // namespace
42
43std::vector<std::string> Split(const std::string& str,
44                               const std::string& delimiter,
45                               bool trim_whitespaces,
46                               bool purge_empty_strings) {
47  std::vector<std::string> tokens;
48  for (std::string::size_type i = 0;;) {
49    const std::string::size_type pos =
50        delimiter.empty() ? (i + 1) : str.find(delimiter, i);
51    std::string tmp_str{str.substr(i, pos - i)};
52    if (trim_whitespaces)
53      base::TrimWhitespaceASCII(tmp_str, base::TRIM_ALL, &tmp_str);
54    if (!tmp_str.empty() || !purge_empty_strings)
55      tokens.emplace_back(std::move(tmp_str));
56    if (pos >= str.size())
57      break;
58    i = pos + delimiter.size();
59  }
60  return tokens;
61}
62
63std::pair<std::string, std::string> SplitAtFirst(const std::string& str,
64                                                 const std::string& delimiter,
65                                                 bool trim_whitespaces) {
66  std::pair<std::string, std::string> pair;
67  SplitAtFirst(str, delimiter, &pair.first, &pair.second, trim_whitespaces);
68  return pair;
69}
70
71}  // namespace weave
72