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
|
// file : libbutl/string-parser.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <libbutl/string-parser.hxx>
using namespace std;
namespace butl
{
namespace string_parser
{
// Utility functions.
//
inline static bool
space (char c) noexcept
{
return c == ' ' || c == '\t' || c == '\n' || c == '\r';
}
vector<pair<string, size_t>>
parse_quoted_position (const string& s, bool unquote)
{
vector<pair<string, size_t>> r;
for (auto b (s.begin ()), i (b), e (s.end ()); i != e; )
{
for (; i != e && space (*i); ++i) ; // Skip spaces.
if (i == e) // No more strings.
break;
string s;
char quoting ('\0'); // Current quoting mode, can be used as bool.
size_t pos (i - b); // String position.
for (; i != e; ++i)
{
char c (*i);
if (!quoting)
{
if (space (c)) // End of string.
break;
if (c == '"' || c == '\'') // Begin of quoted substring.
{
quoting = c;
if (!unquote)
s += c;
continue;
}
}
else if (c == quoting) // End of quoted substring.
{
quoting = '\0';
if (!unquote)
s += c;
continue;
}
s += c;
}
if (quoting)
throw invalid_string (i - b, "unterminated quoted string");
r.emplace_back (move (s), pos);
}
return r;
}
vector<string>
parse_quoted (const string& s, bool unquote)
{
vector<pair<string, size_t>> sp (parse_quoted_position (s, unquote));
vector<string> r;
r.reserve (sp.size ());
for (auto& s: sp)
r.emplace_back (move (s.first));
return r;
}
string
unquote (const string& s)
{
string r;
char quoting ('\0'); // Current quoting mode, can be used as bool.
for (auto i (s.begin ()), e (s.end ()); i != e; ++i)
{
char c (*i);
if (!quoting)
{
if (c == '"' || c == '\'') // Begin of quoted substring.
{
quoting = c;
continue;
}
}
else if (c == quoting) // End of quoted substring.
{
quoting = '\0';
continue;
}
r += c;
}
return r;
}
vector<string>
unquote (const vector<string>& v)
{
vector<string> r;
r.reserve (v.size ());
for (auto& s: v)
r.emplace_back (unquote (s));
return r;
}
}
}
|
