Directory: | ./ |
---|---|
File: | src/msrproto/expat_wrapper_impl.h |
Date: | 2024-06-11 13:26:39 |
Exec | Total | Coverage | |
---|---|---|---|
Lines: | 44 | 55 | 80.0% |
Branches: | 24 | 62 | 38.7% |
Line | Branch | Exec | Source |
---|---|---|---|
1 | /***************************************************************************** | ||
2 | * | ||
3 | * Copyright (C) 2021 Bjarne von Horn (vh at igh dot de) | ||
4 | * | ||
5 | * This file is part of the PdCom library. | ||
6 | * | ||
7 | * The PdCom library is free software: you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU Lesser General Public License as published by | ||
9 | * the Free Software Foundation, either version 3 of the License, or (at your | ||
10 | * option) any later version. | ||
11 | * | ||
12 | * The PdCom library is distributed in the hope that it will be useful, but | ||
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | ||
14 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public | ||
15 | * License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU Lesser General Public License | ||
18 | * along with the PdCom library. If not, see <http://www.gnu.org/licenses/>. | ||
19 | * | ||
20 | *****************************************************************************/ | ||
21 | |||
22 | #ifndef MSRPROTO_EXPAT_WRAPPER_IMPL_H | ||
23 | #define MSRPROTO_EXPAT_WRAPPER_IMPL_H | ||
24 | |||
25 | #include "expat_wrapper.h" | ||
26 | |||
27 | #include <expat.h> | ||
28 | #include <expat_external.h> | ||
29 | #include <pdcom5/Exception.h> | ||
30 | #include <stdexcept> | ||
31 | |||
32 | namespace PdCom { namespace impl { namespace MsrProto { | ||
33 | 136 | inline void XmlParserDeleter::operator()(XML_ParserStruct *s) noexcept | |
34 | { | ||
35 |
1/2✓ Branch 0 taken 136 times.
✗ Branch 1 not taken.
|
136 | if (s) |
36 | 136 | XML_ParserFree(s); | |
37 | 136 | } | |
38 | |||
39 | |||
40 | template <typename Handler, bool useExpatBuffer, bool setReparseDeferralEnabled> | ||
41 | struct ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>:: | ||
42 | CallbackWrapper | ||
43 | { | ||
44 | // TODO(ighvh): use template<auto> when C++17 is mandatory (so in about 10 | ||
45 | // years) | ||
46 | template <typename T, T, int = 0> | ||
47 | struct Impl; | ||
48 | |||
49 | // We use a partial specialisation of the struct above | ||
50 | // to extract the argument types (Args) from the Member function. | ||
51 | template < | ||
52 | typename... Args, | ||
53 | void (Handler::*callback)(Args...), | ||
54 | int level_change> | ||
55 | struct Impl<void (Handler::*)(Args...), callback, level_change> | ||
56 | { | ||
57 | 1684 | static void XMLCALL call(void *userdata, Args... args) | |
58 | { | ||
59 | 1684 | auto &This = *reinterpret_cast<ExpatWrapper< | |
60 | Handler, useExpatBuffer, setReparseDeferralEnabled> *>( | ||
61 | userdata); | ||
62 | // increment (start handler only) | ||
63 | 1684 | This.level_ += level_change == 1; | |
64 |
3/4✓ Branch 2 taken 2 times.
✓ Branch 3 taken 610 times.
✗ Branch 6 not taken.
✓ Branch 7 taken 1072 times.
|
1684 | if (This.pending_exception_) |
65 | 2 | return; | |
66 | try { | ||
67 |
3/4✓ Branch 4 taken 610 times.
✗ Branch 5 not taken.
✓ Branch 10 taken 1070 times.
✓ Branch 11 taken 2 times.
|
1682 | (static_cast<Handler &>(This).*callback)(args...); |
68 | } | ||
69 | 4 | catch (...) { | |
70 | 2 | This.pending_exception_ = std::current_exception(); | |
71 |
1/4✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 8 taken 2 times.
✗ Branch 9 not taken.
|
2 | XML_StopParser(This.parser_.get(), false); |
72 | } | ||
73 | // decrement (end handler only) | ||
74 | 1682 | This.level_ -= level_change == -1; | |
75 | } | ||
76 | }; | ||
77 | }; | ||
78 | |||
79 | template <typename Handler, bool useExpatBuffer, bool setReparseDeferralEnabled> | ||
80 | 128 | inline ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>:: | |
81 | 128 | ExpatWrapper(const char *encoding) | |
82 | { | ||
83 |
1/2✓ Branch 2 taken 128 times.
✗ Branch 3 not taken.
|
128 | reset(encoding); |
84 | 128 | } | |
85 | |||
86 | template <typename Handler, bool useExpatBuffer, bool setReparseDeferralEnabled> | ||
87 | inline void | ||
88 | 136 | ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>::reset( | |
89 | const char *encoding) | ||
90 | { | ||
91 | 136 | pending_exception_ = nullptr; | |
92 | 136 | level_ = 0; | |
93 | 136 | parser_.reset(XML_ParserCreate(encoding)); | |
94 |
1/2✗ Branch 2 not taken.
✓ Branch 3 taken 136 times.
|
136 | if (!parser_) |
95 | ✗ | throw PdCom::Exception("Could not create XML parser"); | |
96 | |||
97 | #if (XML_MAJOR_VERSION == 2 && XML_MINOR_VERSION >= 6) \ | ||
98 | || (XML_MAJOR_VERSION > 3) | ||
99 | if (XML_SetReparseDeferralEnabled( | ||
100 | parser_.get(), setReparseDeferralEnabled ? XML_TRUE : XML_FALSE) | ||
101 | != XML_TRUE) | ||
102 | throw PdCom::Exception("Could not set ReparseDeferralEnabled attribute " | ||
103 | "of XML parser."); | ||
104 | #endif | ||
105 | |||
106 | using W1 = typename CallbackWrapper::template Impl< | ||
107 | decltype(&Handler::startElement), &Handler::startElement, 1>; | ||
108 | using W2 = typename CallbackWrapper::template Impl< | ||
109 | decltype(&Handler::endElement), &Handler::endElement, -1>; | ||
110 | |||
111 | 136 | XML_SetUserData(parser_.get(), this); | |
112 | 136 | XML_SetStartElementHandler(parser_.get(), &W1::call); | |
113 | 136 | XML_SetEndElementHandler(parser_.get(), &W2::call); | |
114 | 136 | } | |
115 | |||
116 | template <typename Handler, bool useExpatBuffer, bool setReparseDeferralEnabled> | ||
117 | template <typename T> | ||
118 | inline typename std:: | ||
119 | enable_if<!useExpatBuffer && std::is_same<T, char>::value, bool>::type | ||
120 | 6974 | ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>::parse( | |
121 | const T *s, | ||
122 | std::size_t n, | ||
123 | bool final) | ||
124 | { | ||
125 |
1/2✓ Branch 3 taken 6974 times.
✗ Branch 4 not taken.
|
6974 | if (XML_STATUS_OK == XML_Parse(parser_.get(), s, n, final)) |
126 | 6974 | return true; | |
127 | |||
128 | ✗ | const XML_Error err_code = XML_GetErrorCode(parser_.get()); | |
129 | ✗ | if (err_code == XML_ERROR_ABORTED && pending_exception_) { | |
130 | ✗ | auto pe = pending_exception_; | |
131 | ✗ | pending_exception_ = nullptr; | |
132 | ✗ | std::rethrow_exception(pe); | |
133 | } | ||
134 | |||
135 | ✗ | static_cast<Handler *>(this)->xmlError(XML_ErrorString(err_code)); | |
136 | ✗ | return false; | |
137 | } | ||
138 | |||
139 | |||
140 | template <typename Handler, bool useExpatBuffer, bool setReparseDeferralEnabled> | ||
141 | template <std::size_t bufsize> | ||
142 | 436 | ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>:: | |
143 | ExpatBuffer<bufsize>::ExpatBuffer( | ||
144 | ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled> | ||
145 | &wrapper) | ||
146 | { | ||
147 | static_assert(bufsize > 0, "Buffer size of 0 makes no sense."); | ||
148 | static_assert(useExpatBuffer, "Don't make a buffer when not using it"); | ||
149 | 436 | buffer_ = XML_GetBuffer(wrapper.parser_.get(), bufsize); | |
150 |
2/4✗ Branch 1 not taken.
✓ Branch 2 taken 369 times.
✗ Branch 4 not taken.
✓ Branch 5 taken 67 times.
|
436 | if (!buffer_) |
151 | ✗ | throw std::bad_alloc(); | |
152 | 436 | } | |
153 | |||
154 | template <typename Handler, bool useExpatBuffer, bool setReparseDeferralEnabled> | ||
155 | template <std::size_t bufsize> | ||
156 | inline typename std::enable_if<(useExpatBuffer && bufsize > 0), bool>::type | ||
157 | 425 | ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>::parse( | |
158 | ExpatWrapper<Handler, useExpatBuffer, setReparseDeferralEnabled>:: | ||
159 | ExpatBuffer<bufsize> /* buffer */, | ||
160 | std::size_t n, | ||
161 | bool final) | ||
162 | { | ||
163 |
2/4✗ Branch 0 not taken.
✓ Branch 1 taken 358 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 67 times.
|
425 | if (n > bufsize) |
164 | throw PdCom::InvalidArgument( | ||
165 | ✗ | "buffer overflow, wrote more bytes than buffer size."); | |
166 | |||
167 |
3/4✓ Branch 3 taken 355 times.
✓ Branch 4 taken 3 times.
✓ Branch 8 taken 67 times.
✗ Branch 9 not taken.
|
425 | if (XML_STATUS_OK == XML_ParseBuffer(parser_.get(), n, final)) |
168 | 422 | return true; | |
169 | |||
170 | 3 | const XML_Error err_code = XML_GetErrorCode(parser_.get()); | |
171 |
5/12✓ Branch 0 taken 2 times.
✓ Branch 1 taken 1 times.
✓ Branch 4 taken 2 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 2 times.
✓ Branch 7 taken 1 times.
✗ Branch 8 not taken.
✗ Branch 9 not taken.
✗ Branch 12 not taken.
✗ Branch 13 not taken.
✗ Branch 14 not taken.
✗ Branch 15 not taken.
|
3 | if (err_code == XML_ERROR_ABORTED && pending_exception_) { |
172 | 4 | auto pe = pending_exception_; | |
173 | 2 | pending_exception_ = nullptr; | |
174 | 4 | std::rethrow_exception(pe); | |
175 | } | ||
176 | |||
177 |
1/4✓ Branch 0 taken 1 times.
✗ Branch 1 not taken.
✗ Branch 9 not taken.
✗ Branch 10 not taken.
|
1 | static_cast<Handler *>(this)->xmlError(XML_ErrorString(err_code)); |
178 | ✗ | return false; | |
179 | } | ||
180 | |||
181 | }}} // namespace PdCom::impl::MsrProto | ||
182 | |||
183 | #endif // MSRPROTO_EXPAT_WRAPPER_H | ||
184 |