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
|
// string_data_inline.h
/* Copyright 2010 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
// this should never be included directly
#include <stdexcept>
namespace mongo {
inline int StringData::compare(StringData other) const {
int res = memcmp(_data, other._data, std::min(_size, other._size));
if (res != 0) {
return res > 0 ? 1 : -1;
}
else if (_size == other._size) {
return 0;
}
else {
return _size > other._size ? 1 : -1;
}
}
inline bool StringData::equalCaseInsensitive( StringData other ) const {
if ( other.size() != size() )
return false;
for ( size_t x = 0; x < size(); x++ ) {
char a = _data[x];
char b = other._data[x];
if ( a == b )
continue;
if ( tolower(a) == tolower(b) )
continue;
return false;
}
return true;
}
inline void StringData::copyTo( char* dest, bool includeEndingNull ) const {
memcpy( dest, _data, size() );
if ( includeEndingNull )
dest[size()] = 0;
}
inline size_t StringData::find( char c, size_t fromPos ) const {
if ( fromPos >= size() )
return std::string::npos;
const void* x = memchr( _data + fromPos, c, _size - fromPos );
if ( x == 0 )
return std::string::npos;
return static_cast<size_t>( static_cast<const char*>(x) - _data );
}
inline size_t StringData::find( StringData needle ) const {
size_t mx = size();
size_t needleSize = needle.size();
if ( needleSize == 0 )
return 0;
else if ( needleSize > mx )
return std::string::npos;
mx -= needleSize;
for ( size_t i = 0; i <= mx; i++ ) {
if ( memcmp( _data + i, needle._data, needleSize ) == 0 )
return i;
}
return std::string::npos;
}
inline size_t StringData::rfind( char c, size_t fromPos ) const {
const size_t sz = size();
if ( fromPos > sz )
fromPos = sz;
for ( const char* cur = _data + fromPos; cur > _data; --cur ) {
if ( *(cur - 1) == c )
return (cur - _data) - 1;
}
return std::string::npos;
}
inline StringData StringData::substr( size_t pos, size_t n ) const {
if ( pos > size() )
throw std::out_of_range( "out of range" );
// truncate to end of string
if ( n > size() - pos )
n = size() - pos;
return StringData( _data + pos, n );
}
inline bool StringData::startsWith( StringData prefix ) const {
// TODO: Investigate an optimized implementation.
return substr(0, prefix.size()) == prefix;
}
inline bool StringData::endsWith( StringData suffix ) const {
// TODO: Investigate an optimized implementation.
const size_t thisSize = size();
const size_t suffixSize = suffix.size();
if (suffixSize > thisSize)
return false;
return substr(thisSize - suffixSize) == suffix;
}
} // namespace mongo
|
