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
13 namespace weave {
14
15 namespace {
16
SplitAtFirst(const std::string & str,const std::string & delimiter,std::string * left_part,std::string * right_part,bool trim_whitespaces)17 bool 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
Split(const std::string & str,const std::string & delimiter,bool trim_whitespaces,bool purge_empty_strings)43 std::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
SplitAtFirst(const std::string & str,const std::string & delimiter,bool trim_whitespaces)63 std::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