2 /*******************************************************************************
4 Copyright (c) 2009, Charles McGarvey
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
10 * Redistributions of source code must retain the above copyright notice,
11 this list of conditions and the following disclaimer.
12 * Redistributions in binary form must reproduce the above copyright notice,
13 this list of conditions and the following disclaimer in the documentation
14 and/or other materials provided with the distribution.
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
20 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
23 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *******************************************************************************/
32 #include <yajl/yajl_parse.h>
34 #include "serializable.hh"
35 #include "deserializer.hh"
41 class deserializer::deserializer_impl
44 deserializer_impl(const std::string
& filePath
, bool comments
= false,
47 std::ifstream
* input
= new std::ifstream(filePath
.c_str());
48 init(*input
, true, comments
, check
);
51 deserializer_impl(std::istream
& input
, bool comments
= false,
54 init(input
, false, comments
, check
);
59 while (!parsed
.empty())
61 delete parsed
.front();
74 unsigned char* errorMsg
= yajl_get_error(hand
, 0, 0, 0);
75 deserializer::exception
problem((char*)errorMsg
);
76 yajl_free_error(hand
, errorMsg
);
81 static int parsedNull(void* ctx
)
83 ((deserializer_impl
*)ctx
)->parsed
.push(new null
);
87 static int parsedBoolean(void* ctx
, int value
)
89 ((deserializer_impl
*)ctx
)->parsed
.push(new wrapped_boolean(value
));
93 static int parsedInteger(void* ctx
, long value
)
95 ((deserializer_impl
*)ctx
)->parsed
.push(new wrapped_integer(value
));
99 static int parsedFloat(void* ctx
, double value
)
101 ((deserializer_impl
*)ctx
)->parsed
.push(new wrapped_real(value
));
105 static int parsedString(void* ctx
, const unsigned char* value
,
108 wrapped_string
* parsed
= new wrapped_string(std::string((char*)value
,
110 ((deserializer_impl
*)ctx
)->parsed
.push(parsed
);
114 static int parsedBeginMap(void* ctx
)
116 ((deserializer_impl
*)ctx
)->parsed
.push(new wrapped_dictionary
);
120 static int parsedMapKey(void* ctx
, const unsigned char* value
,
123 // same thing as a string
124 return parsedString(ctx
, value
, length
);
127 static int parsedEndMap(void* ctx
)
129 ((deserializer_impl
*)ctx
)->parsed
.push(0);
133 static int parsedBeginArray(void* ctx
)
135 ((deserializer_impl
*)ctx
)->parsed
.push(new wrapped_array
);
139 static int parsedEndArray(void* ctx
)
141 ((deserializer_impl
*)ctx
)->parsed
.push(0);
148 unsigned char buffer
[4096];
152 while (parsed
.empty() && in
->good())
154 in
->read((char*)buffer
, sizeof(buffer
));
155 unsigned readIn
= in
->gcount();
159 stat
= yajl_parse(hand
, buffer
, readIn
);
163 stat
= yajl_parse_complete(hand
);
166 if (stat
!= yajl_status_ok
&&
167 stat
!= yajl_status_insufficient_data
)
180 std::queue
<serializable
*> parsed
;
183 void init(std::istream
& input
, bool deleteIn
, bool comments
, bool check
)
185 // this has to be static because yajl actually does not copy it into its
186 // internal data structures but rather keeps a pointer to this
187 static const yajl_callbacks callbacks
=
189 deserializer_impl::parsedNull
,
190 deserializer_impl::parsedBoolean
,
191 deserializer_impl::parsedInteger
,
192 deserializer_impl::parsedFloat
,
194 deserializer_impl::parsedString
,
195 deserializer_impl::parsedBeginMap
,
196 deserializer_impl::parsedMapKey
,
197 deserializer_impl::parsedEndMap
,
198 deserializer_impl::parsedBeginArray
,
199 deserializer_impl::parsedEndArray
203 deleteWhenDone
= deleteIn
;
205 yajl_parser_config config
= {comments
, check
};
206 hand
= yajl_alloc(&callbacks
, &config
, NULL
, this);
211 deserializer::deserializer(const std::string
& filePath
, bool comments
,
214 impl(new deserializer::deserializer_impl(filePath
, comments
, check
)) {}
216 deserializer::deserializer(std::istream
& input
, bool comments
, bool check
) :
218 impl(new deserializer::deserializer_impl(input
, comments
, check
)) {}
221 serializable_ptr
deserializer::deserialize()
223 serializable
* ptr
= pullNext();
226 ptr
->deserialize(*this);
228 return serializable_ptr(ptr
);
232 serializable
* deserializer::pullNext()
235 if (!impl
->parsed
.empty())
237 serializable
* ptr
= impl
->parsed
.front();
243 void deserializer::pop()
252 /** vim: set ts=4 sw=4 tw=80: *************************************************/