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
|
/*************************************************************************
** utility.cpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2017 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include <algorithm>
#include <cctype>
#include <functional>
#include "utility.hpp"
using namespace std;
/** Returns a given string with leading and trailing whitespace removed.
* @param[in] str the string to process
* @param[in] ws characters treated as whitespace
* @return the trimmed string */
string util::trim (const std::string &str, const char *ws) {
size_t first = str.find_first_not_of(ws);
if (first == string::npos)
return "";
size_t last = str.find_last_not_of(ws);
return str.substr(first, last-first+1);
}
/** Removes leading and trailing whitespace from a given string, and replaces
* all other whitespace sequences by single spaces.
* @param[in] str the string to process
* @param[in] ws characters treated as whitespace
* @return the normalized string */
string util::normalize_space (string str, const char *ws) {
str = trim(str);
size_t first = str.find_first_of(ws);
while (first != string::npos) {
size_t last = str.find_first_not_of(ws, first);
str.replace(first, last-first, " ");
first = str.find_first_of(ws, first+1);
}
return str;
}
string& util::tolower (string &str) {
transform(str.begin(), str.end(), str.begin(), ::tolower);
return str;
}
/** Returns the integer part of log10 of a given integer \f$n>0\f$.
* If \f$n<0\f$, the result is 0. */
int util::ilog10 (int n) {
int result = 0;
while (n >= 10) {
result++;
n /= 10;
}
return result;
}
|