1 //
2 // String.h
3 //
4 // Library: Foundation
5 // Package: Core
6 // Module: String
7 //
8 // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
9 // and Contributors.
10 //
11 // SPDX-License-Identifier: BSL-1.0
12 //
13
14 #include "Poco/JSONString.h"
15 #include "Poco/UTF8String.h"
16 #include <ostream>
17
18
19 namespace {
20
21
22 template<typename T, typename S>
23 struct WriteFunc
24 {
25 typedef T& (T::*Type)(const char* s, S n);
26 };
27
28
29
30 template<typename T, typename S>
writeString(const std::string & value,T & obj,typename WriteFunc<T,S>::Type write,int options)31 void writeString(const std::string &value, T& obj, typename WriteFunc<T, S>::Type write, int options)
32 {
33 bool wrap = ((options & Poco::JSON_WRAP_STRINGS) != 0);
34 bool escapeAllUnicode = ((options & Poco::JSON_ESCAPE_UNICODE) != 0);
35
36 if (value.size() == 0)
37 {
38 if(wrap) (obj.*write)("\"\"", 2);
39 return;
40 }
41
42 if(wrap) (obj.*write)("\"", 1);
43 if(escapeAllUnicode)
44 {
45 std::string str = Poco::UTF8::escape(value.begin(), value.end(), true);
46 (obj.*write)(str.c_str(), str.size());
47 }
48 else
49 {
50 for(std::string::const_iterator it = value.begin(), end = value.end(); it != end; ++it)
51 {
52 // Forward slash isn't strictly required by JSON spec, but some parsers expect it
53 if((*it >= 0 && *it <= 31) || (*it == '"') || (*it == '\\') || (*it == '/'))
54 {
55 std::string str = Poco::UTF8::escape(it, it + 1, true);
56 (obj.*write)(str.c_str(), str.size());
57 }else (obj.*write)(&(*it), 1);
58 }
59 }
60 if(wrap) (obj.*write)("\"", 1);
61 };
62
63
64 }
65
66
67 namespace Poco {
68
69
toJSON(const std::string & value,std::ostream & out,bool wrap)70 void toJSON(const std::string& value, std::ostream& out, bool wrap)
71 {
72 int options = (wrap ? Poco::JSON_WRAP_STRINGS : 0);
73 writeString<std::ostream, std::streamsize>(value, out, &std::ostream::write, options);
74 }
75
76
toJSON(const std::string & value,bool wrap)77 std::string toJSON(const std::string& value, bool wrap)
78 {
79 int options = (wrap ? Poco::JSON_WRAP_STRINGS : 0);
80 std::string ret;
81 writeString<std::string,
82 std::string::size_type>(value, ret, &std::string::append, options);
83 return ret;
84 }
85
86
toJSON(const std::string & value,std::ostream & out,int options)87 void toJSON(const std::string& value, std::ostream& out, int options)
88 {
89 writeString<std::ostream, std::streamsize>(value, out, &std::ostream::write, options);
90 }
91
92
toJSON(const std::string & value,int options)93 std::string toJSON(const std::string& value, int options)
94 {
95 std::string ret;
96 writeString<std::string, std::string::size_type>(value, ret, &std::string::append, options);
97 return ret;
98 }
99
100
101 } // namespace Poco
102