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
|
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/string_escape.h"
#include <string>
#include "base/string_util.h"
namespace string_escape {
// Try to escape |c| as a "SingleEscapeCharacter" (\n, etc). If successful,
// returns true and appends the escape sequence to |dst|.
template<typename CHAR>
static bool JavascriptSingleEscapeChar(const CHAR c, std::string* dst) {
// WARNING: if you add a new case here, you need to update the reader as well.
switch (c) {
case '\b':
dst->append("\\b");
break;
case '\f':
dst->append("\\f");
break;
case '\n':
dst->append("\\n");
break;
case '\r':
dst->append("\\r");
break;
case '\t':
dst->append("\\t");
break;
case '\v':
dst->append("\\v");
break;
case '\\':
dst->append("\\\\");
break;
case '"':
dst->append("\\\"");
break;
default:
return false;
}
return true;
}
void JavascriptDoubleQuote(const std::wstring& str,
bool put_in_quotes,
std::string* dst) {
if (put_in_quotes)
dst->push_back('"');
for (std::wstring::const_iterator it = str.begin(); it != str.end(); ++it) {
wchar_t c = *it;
if (!JavascriptSingleEscapeChar(c, dst)) {
if (c > 255) {
// Non-ascii values need to be unicode dst->
// TODO(tc): Some unicode values are handled specially. See
// spidermonkey code.
StringAppendF(dst, "\\u%04X", c);
} else if (c < 32 || c > 126) {
// Spidermonkey hex escapes these values.
StringAppendF(dst, "\\x%02X", c);
} else {
dst->push_back(static_cast<char>(c));
}
}
}
if (put_in_quotes)
dst->push_back('"');
}
void JavascriptDoubleQuote(const std::string& str,
bool put_in_quotes,
std::string* dst) {
if (put_in_quotes)
dst->push_back('"');
for (std::string::const_iterator it = str.begin(); it != str.end(); ++it) {
unsigned char c = *it;
if (!JavascriptSingleEscapeChar(c, dst)) {
// Hex encode if the character is non-printable 7bit ascii
if (c < 32 || c == 127) {
StringAppendF(dst, "\\x%02X", c);
} else {
dst->push_back(static_cast<char>(c));
}
}
}
if (put_in_quotes)
dst->push_back('"');
}
} // namespace string_escape
|
