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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
#include "sass.hpp"
#include "position.hpp"
namespace Sass {
Offset::Offset(const char chr)
: line(chr == '\n' ? 1 : 0),
column(chr == '\n' ? 0 : 1)
{}
Offset::Offset(const char* string)
: line(0), column(0)
{
*this = inc(string, string + strlen(string));
}
Offset::Offset(const std::string& text)
: line(0), column(0)
{
*this = inc(text.c_str(), text.c_str() + text.size());
}
Offset::Offset(const size_t line, const size_t column)
: line(line), column(column) { }
// init/create instance from const char substring
Offset Offset::init(const char* beg, const char* end)
{
Offset offset(0, 0);
if (end == 0) {
end += strlen(beg);
}
offset.add(beg, end);
return offset;
}
// increase offset by given string (mostly called by lexer)
// increase line counter and count columns on the last line
Offset Offset::add(const char* begin, const char* end)
{
if (end == 0) return *this;
while (begin < end && *begin) {
if (*begin == '\n') {
++ line;
// start new line
column = 0;
} else {
// do not count any utf8 continuation bytes
// https://stackoverflow.com/a/9356203/1550314
// https://en.wikipedia.org/wiki/UTF-8#Description
unsigned char chr = *begin;
// skip over 10xxxxxx
// is 1st bit not set
if ((chr & 128) == 0) {
// regular ascii char
column += 1;
}
// is 2nd bit not set
else if ((chr & 64) == 0) {
// first utf8 byte
column += 1;
}
}
++ begin;
}
return *this;
}
// increase offset by given string (mostly called by lexer)
// increase line counter and count columns on the last line
Offset Offset::inc(const char* begin, const char* end) const
{
Offset offset(line, column);
offset.add(begin, end);
return offset;
}
bool Offset::operator== (const Offset &pos) const
{
return line == pos.line && column == pos.column;
}
bool Offset::operator!= (const Offset &pos) const
{
return line != pos.line || column != pos.column;
}
void Offset::operator+= (const Offset &off)
{
*this = Offset(line + off.line, off.line > 0 ? off.column : column + off.column);
}
Offset Offset::operator+ (const Offset &off) const
{
return Offset(line + off.line, off.line > 0 ? off.column : column + off.column);
}
Offset Offset::operator- (const Offset &off) const
{
return Offset(line - off.line, off.line == line ? column - off.column : column);
}
Position::Position(const size_t file)
: Offset(0, 0), file(file) { }
Position::Position(const size_t file, const Offset& offset)
: Offset(offset), file(file) { }
Position::Position(const size_t line, const size_t column)
: Offset(line, column), file(-1) { }
Position::Position(const size_t file, const size_t line, const size_t column)
: Offset(line, column), file(file) { }
ParserState::ParserState(const char* path, const char* src, const size_t file)
: Position(file, 0, 0), path(path), src(src), offset(0, 0), token() { }
ParserState::ParserState(const char* path, const char* src, const Position& position, Offset offset)
: Position(position), path(path), src(src), offset(offset), token() { }
ParserState::ParserState(const char* path, const char* src, const Token& token, const Position& position, Offset offset)
: Position(position), path(path), src(src), offset(offset), token(token) { }
Position Position::add(const char* begin, const char* end)
{
Offset::add(begin, end);
return *this;
}
Position Position::inc(const char* begin, const char* end) const
{
Offset offset(line, column);
offset = offset.inc(begin, end);
return Position(file, offset);
}
bool Position::operator== (const Position &pos) const
{
return file == pos.file && line == pos.line && column == pos.column;
}
bool Position::operator!= (const Position &pos) const
{
return file == pos.file || line != pos.line || column != pos.column;
}
void Position::operator+= (const Offset &off)
{
*this = Position(file, line + off.line, off.line > 0 ? off.column : column + off.column);
}
const Position Position::operator+ (const Offset &off) const
{
return Position(file, line + off.line, off.line > 0 ? off.column : column + off.column);
}
const Offset Position::operator- (const Offset &off) const
{
return Offset(line - off.line, off.line == line ? column - off.column : column);
}
/* not used anymore - remove?
std::ostream& operator<<(std::ostream& strm, const Offset& off)
{
if (off.line == string::npos) strm << "-1:"; else strm << off.line << ":";
if (off.column == string::npos) strm << "-1"; else strm << off.column;
return strm;
} */
/* not used anymore - remove?
std::ostream& operator<<(std::ostream& strm, const Position& pos)
{
if (pos.file != string::npos) strm << pos.file << ":";
if (pos.line == string::npos) strm << "-1:"; else strm << pos.line << ":";
if (pos.column == string::npos) strm << "-1"; else strm << pos.column;
return strm;
} */
}
|
