1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/**
* Copyright (c) 2014, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef STRING_UTILS_H_
#define STRING_UTILS_H_
#include <stdint.h>
#include <algorithm>
#include <cassert>
#include <cctype>
#include <functional>
#include <ostream>
#include <sstream>
#include <string>
/*
* Commonly used string processing functions
*/
/*
* Stream indentation helper class. Hooks the stream that is
* passed to it's constructor processing all the input to that stream
* and issuing indentation spaces when newline symbol is put to the stream.
* Unhooks from stream on destruction.
*/
class Indent: private std::streambuf {
public:
/*
* Constructs indentation 'sentry' object hooking on |dest| stream.
* |ident_size| is the indentation width (spaces).
*/
explicit Indent(std::ostream& dest, size_t ident_size = 2)
: dest_buf_(dest.rdbuf()),
new_line_started_(true),
ident_(ident_size, ' '),
owner_(&dest) {
owner_->rdbuf(this);
}
~Indent() {
owner_->rdbuf( dest_buf_ );
}
private:
virtual int overflow( int ch ) {
if ( new_line_started_ && ch != '\n' ) {
dest_buf_->sputn(ident_.data(), ident_.size());
}
new_line_started_ = ch == '\n';
return dest_buf_->sputc(ch);
}
private:
std::streambuf* dest_buf_;
bool new_line_started_;
std::string ident_;
std::ostream* owner_;
};
/*
* String to numerical (int, double) conversion function.
* Checks wether |str_val| contains a number and converts
* it to |out_val|.
* Returns false on failure.
*/
template<typename T>
bool StringToNumber(const std::string& str_val, T* out_val) {
assert(out_val);
std::stringstream stream(str_val);
stream>>(*out_val);
return bool(stream);
}
/*
* Number to string conversion function.
*/
template<typename T>
inline std::string NumberToString(T number) {
std::stringstream stream;
std::string result;
stream<<number;
stream>>result;
return result;
}
/*
* In-place string trimming function, trims spaces at string beginning
*/
inline std::string& ltrim(std::string &s) {
s.erase(
s.begin(),
std::find_if(s.begin(), s.end(),
std::not1(std::ptr_fun<int, int>(std::isspace))));
return s;
}
/*
* In-place string trimming function, trims spaces at string end
*/
inline std::string& rtrim(std::string &s) {
s.erase(
std::find_if(s.rbegin(), s.rend(),
std::not1(std::ptr_fun<int, int>(std::isspace))).base(),
s.end());
return s;
}
/*
* In-place string trimming function, trims spaces around text
*/
inline std::string& trim(std::string &s) {
return ltrim(rtrim(s));
}
/*
* Converts ASCII string to lowercase
*/
inline std::string to_lower(std::string str) {
for (std::string::iterator i = str.begin(); i != str.end(); ++i) {
*i = std::tolower(*i);
}
return str;
}
/*
* Converts ASCII string to uppercase
*/
inline std::string to_upper(std::string str) {
for (std::string::iterator i = str.begin(); i != str.end(); ++i) {
*i = std::toupper(*i);
}
return str;
}
#endif /* STRING_UTILS_H_ */
|
