Bug Summary

File:comphelper/source/misc/anytostring.cxx
Location:line 257, column 13
Description:Dereference of null pointer

Annotated Source Code

1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19
20
21#include "comphelper/anytostring.hxx"
22#include "osl/diagnose.h"
23#include "rtl/ustrbuf.hxx"
24#include "typelib/typedescription.h"
25#include "com/sun/star/lang/XServiceInfo.hpp"
26
27using namespace ::com::sun::star;
28
29namespace comphelper {
30namespace {
31
32void appendTypeError(
33 rtl::OUStringBuffer & buf, typelib_TypeDescriptionReference * typeRef )
34{
35 buf.appendAscii(
36 RTL_CONSTASCII_STRINGPARAM("<cannot get type description of type ")(&("<cannot get type description of type ")[0]), ((sal_Int32
)(sizeof ("<cannot get type description of type ") / sizeof
(("<cannot get type description of type ")[0]))-1) );
37 buf.append( rtl::OUString::unacquired( &typeRef->pTypeName ) );
38 buf.append( static_cast< sal_Unicode >('>') );
39}
40
41inline void appendChar( rtl::OUStringBuffer & buf, sal_Unicode c )
42{
43 if (c < ' ' || c > '~') {
44 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\\X")(&("\\X")[0]), ((sal_Int32)(sizeof ("\\X") / sizeof (("\\X"
)[0]))-1) );
45 rtl::OUString const s(
46 rtl::OUString::valueOf( static_cast< sal_Int32 >(c), 16 ) );
47 for ( sal_Int32 f = 4 - s.getLength(); f > 0; --f )
48 buf.append( static_cast< sal_Unicode >('0') );
49 buf.append( s );
50 }
51 else {
52 buf.append( c );
53 }
54}
55
56//------------------------------------------------------------------------------
57void appendValue( rtl::OUStringBuffer & buf,
58 void const * val, typelib_TypeDescriptionReference * typeRef,
59 bool prependType )
60{
61 if (typeRef->eTypeClass == typelib_TypeClass_VOID) {
2
←
Taking false branch
→
62 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("void")(&("void")[0]), ((sal_Int32)(sizeof ("void") / sizeof (("void"
)[0]))-1) );
63 return;
64 }
65 OSL_ASSERT( val != 0 )do { if (true && (!(val != 0))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/comphelper/source/misc/anytostring.cxx"
":" "65" ": "), "OSL_ASSERT: %s", "val != 0"); } } while (false
);
66
67 if (prependType &&
3
←
Taking false branch
→
68 typeRef->eTypeClass != typelib_TypeClass_STRING &&
69 typeRef->eTypeClass != typelib_TypeClass_CHAR &&
70 typeRef->eTypeClass != typelib_TypeClass_BOOLEAN)
71 {
72 buf.append( static_cast< sal_Unicode >('(') );
73 buf.append( rtl::OUString::unacquired( &typeRef->pTypeName ) );
74 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(") ")(&(") ")[0]), ((sal_Int32)(sizeof (") ") / sizeof ((") ")
[0]))-1) );
75 }
76
77 switch (typeRef->eTypeClass) {
4
←
Control jumps to 'case typelib_TypeClass_BOOLEAN:' at line 256
→
78 case typelib_TypeClass_INTERFACE: {
79 buf.append( static_cast<sal_Unicode>('@') );
80 buf.append( reinterpret_cast< sal_Int64 >(
81 *static_cast< void * const * >(val) ), 16 );
82 uno::Reference< lang::XServiceInfo > xServiceInfo(
83 *static_cast< uno::XInterface * const * >(val),
84 uno::UNO_QUERY );
85 if (xServiceInfo.is()) {
86 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM((&(" (ImplementationName = \"")[0]), ((sal_Int32)(sizeof (
" (ImplementationName = \"") / sizeof ((" (ImplementationName = \""
)[0]))-1)
87 " (ImplementationName = \"")(&(" (ImplementationName = \"")[0]), ((sal_Int32)(sizeof (
" (ImplementationName = \"") / sizeof ((" (ImplementationName = \""
)[0]))-1) );
88 buf.append( xServiceInfo->getImplementationName() );
89 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\")")(&("\")")[0]), ((sal_Int32)(sizeof ("\")") / sizeof (("\")"
)[0]))-1) );
90 }
91 break;
92 }
93 case typelib_TypeClass_STRUCT:
94 case typelib_TypeClass_EXCEPTION: {
95 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("{ ")(&("{ ")[0]), ((sal_Int32)(sizeof ("{ ") / sizeof (("{ ")
[0]))-1) );
96 typelib_TypeDescription * typeDescr = 0;
97 typelib_typedescriptionreference_getDescription( &typeDescr, typeRef );
98 if (typeDescr == 0 || !typelib_typedescription_complete( &typeDescr )) {
99 appendTypeError( buf, typeRef );
100 }
101 else {
102 typelib_CompoundTypeDescription * compType =
103 reinterpret_cast< typelib_CompoundTypeDescription * >(
104 typeDescr );
105 sal_Int32 nDescr = compType->nMembers;
106
107 if (compType->pBaseTypeDescription) {
108 appendValue(
109 buf, val, reinterpret_cast<
110 typelib_TypeDescription * >(
111 compType->pBaseTypeDescription)->pWeakRef, false );
112 if (nDescr > 0)
113 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(", ")(&(", ")[0]), ((sal_Int32)(sizeof (", ") / sizeof ((", ")
[0]))-1) );
114 }
115
116 typelib_TypeDescriptionReference ** ppTypeRefs =
117 compType->ppTypeRefs;
118 sal_Int32 * memberOffsets = compType->pMemberOffsets;
119 rtl_uString ** ppMemberNames = compType->ppMemberNames;
120
121 for ( sal_Int32 nPos = 0; nPos < nDescr; ++nPos )
122 {
123 buf.append( ppMemberNames[ nPos ] );
124 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" = ")(&(" = ")[0]), ((sal_Int32)(sizeof (" = ") / sizeof ((" = "
)[0]))-1) );
125 typelib_TypeDescription * memberType = 0;
126 TYPELIB_DANGER_GET( &memberType, ppTypeRefs[ nPos ] ){ typelib_TypeDescriptionReference * pMacroTypeRef = (ppTypeRefs
[ nPos ]); typelib_TypeDescription ** ppMacroTypeDescr = (&
memberType); if (((pMacroTypeRef->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| (pMacroTypeRef->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) { typelib_typedescriptionreference_getDescription( ppMacroTypeDescr
, pMacroTypeRef ); } else if (!pMacroTypeRef->pType || !pMacroTypeRef
->pType->pWeakRef) { typelib_typedescriptionreference_getDescription
( ppMacroTypeDescr, pMacroTypeRef ); if (*ppMacroTypeDescr) typelib_typedescription_release
( *ppMacroTypeDescr ); } else { *ppMacroTypeDescr = pMacroTypeRef
->pType; } };
127 if (memberType == 0) {
128 appendTypeError( buf, ppTypeRefs[ nPos ] );
129 }
130 else {
131 appendValue( buf,
132 static_cast< char const * >(
133 val ) + memberOffsets[ nPos ],
134 memberType->pWeakRef, true );
135 TYPELIB_DANGER_RELEASE( memberType ){ if ((((memberType)->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| ((memberType)->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) typelib_typedescription_release( memberType ); };
136 }
137 if (nPos < (nDescr - 1))
138 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(", ")(&(", ")[0]), ((sal_Int32)(sizeof (", ") / sizeof ((", ")
[0]))-1) );
139 }
140 }
141 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" }")(&(" }")[0]), ((sal_Int32)(sizeof (" }") / sizeof ((" }")
[0]))-1) );
142 if (typeDescr != 0)
143 typelib_typedescription_release( typeDescr );
144 break;
145 }
146 case typelib_TypeClass_SEQUENCE: {
147 typelib_TypeDescription * typeDescr = 0;
148 TYPELIB_DANGER_GET( &typeDescr, typeRef ){ typelib_TypeDescriptionReference * pMacroTypeRef = (typeRef
); typelib_TypeDescription ** ppMacroTypeDescr = (&typeDescr
); if (((pMacroTypeRef->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| (pMacroTypeRef->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) { typelib_typedescriptionreference_getDescription( ppMacroTypeDescr
, pMacroTypeRef ); } else if (!pMacroTypeRef->pType || !pMacroTypeRef
->pType->pWeakRef) { typelib_typedescriptionreference_getDescription
( ppMacroTypeDescr, pMacroTypeRef ); if (*ppMacroTypeDescr) typelib_typedescription_release
( *ppMacroTypeDescr ); } else { *ppMacroTypeDescr = pMacroTypeRef
->pType; } };
149 if (typeDescr == 0) {
150 appendTypeError( buf,typeRef );
151 }
152 else {
153 typelib_TypeDescriptionReference * elementTypeRef =
154 reinterpret_cast<
155 typelib_IndirectTypeDescription * >(typeDescr)->pType;
156 typelib_TypeDescription * elementTypeDescr = 0;
157 TYPELIB_DANGER_GET( &elementTypeDescr, elementTypeRef ){ typelib_TypeDescriptionReference * pMacroTypeRef = (elementTypeRef
); typelib_TypeDescription ** ppMacroTypeDescr = (&elementTypeDescr
); if (((pMacroTypeRef->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| (pMacroTypeRef->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) { typelib_typedescriptionreference_getDescription( ppMacroTypeDescr
, pMacroTypeRef ); } else if (!pMacroTypeRef->pType || !pMacroTypeRef
->pType->pWeakRef) { typelib_typedescriptionreference_getDescription
( ppMacroTypeDescr, pMacroTypeRef ); if (*ppMacroTypeDescr) typelib_typedescription_release
( *ppMacroTypeDescr ); } else { *ppMacroTypeDescr = pMacroTypeRef
->pType; } };
158 if (elementTypeDescr == 0)
159 {
160 appendTypeError( buf, elementTypeRef );
161 }
162 else
163 {
164 sal_Int32 nElementSize = elementTypeDescr->nSize;
165 uno_Sequence * seq =
166 *static_cast< uno_Sequence * const * >(val);
167 sal_Int32 nElements = seq->nElements;
168
169 if (nElements > 0)
170 {
171 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("{ ")(&("{ ")[0]), ((sal_Int32)(sizeof ("{ ") / sizeof (("{ ")
[0]))-1) );
172 char const * pElements = seq->elements;
173 for ( sal_Int32 nPos = 0; nPos < nElements; ++nPos )
174 {
175 appendValue(
176 buf, pElements + (nElementSize * nPos),
177 elementTypeDescr->pWeakRef, false );
178 if (nPos < (nElements - 1))
179 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(", ")(&(", ")[0]), ((sal_Int32)(sizeof (", ") / sizeof ((", ")
[0]))-1) );
180 }
181 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" }")(&(" }")[0]), ((sal_Int32)(sizeof (" }") / sizeof ((" }")
[0]))-1) );
182 }
183 else
184 {
185 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("{}")(&("{}")[0]), ((sal_Int32)(sizeof ("{}") / sizeof (("{}")
[0]))-1) );
186 }
187 TYPELIB_DANGER_RELEASE( elementTypeDescr ){ if ((((elementTypeDescr)->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| ((elementTypeDescr)->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) typelib_typedescription_release( elementTypeDescr ); };
188 }
189 TYPELIB_DANGER_RELEASE( typeDescr ){ if ((((typeDescr)->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| ((typeDescr)->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) typelib_typedescription_release( typeDescr ); };
190 }
191 break;
192 }
193 case typelib_TypeClass_ANY: {
194 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("{ ")(&("{ ")[0]), ((sal_Int32)(sizeof ("{ ") / sizeof (("{ ")
[0]))-1) );
195 uno_Any const * pAny = static_cast< uno_Any const * >(val);
196 appendValue( buf, pAny->pData, pAny->pType, true );
197 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(" }")(&(" }")[0]), ((sal_Int32)(sizeof (" }") / sizeof ((" }")
[0]))-1) );
198 break;
199 }
200 case typelib_TypeClass_TYPE:
201 buf.append( (*reinterpret_cast<
202 typelib_TypeDescriptionReference * const * >(val)
203 )->pTypeName );
204 break;
205 case typelib_TypeClass_STRING: {
206 buf.append( static_cast< sal_Unicode >('\"') );
207 rtl::OUString const & str = rtl::OUString::unacquired(
208 static_cast< rtl_uString * const * >(val) );
209 sal_Int32 len = str.getLength();
210 for ( sal_Int32 pos = 0; pos < len; ++pos )
211 {
212 sal_Unicode c = str[ pos ];
213 if (c == '\"')
214 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\\\"")(&("\\\"")[0]), ((sal_Int32)(sizeof ("\\\"") / sizeof (("\\\""
)[0]))-1) );
215 else if (c == '\\')
216 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\\\\")(&("\\\\")[0]), ((sal_Int32)(sizeof ("\\\\") / sizeof (("\\\\"
)[0]))-1) );
217 else
218 appendChar( buf, c );
219 }
220 buf.append( static_cast< sal_Unicode >('\"') );
221 break;
222 }
223 case typelib_TypeClass_ENUM: {
224 typelib_TypeDescription * typeDescr = 0;
225 typelib_typedescriptionreference_getDescription( &typeDescr, typeRef );
226 if (typeDescr == 0 || !typelib_typedescription_complete( &typeDescr )) {
227 appendTypeError( buf, typeRef );
228 }
229 else
230 {
231 sal_Int32 * pValues =
232 reinterpret_cast< typelib_EnumTypeDescription * >(
233 typeDescr )->pEnumValues;
234 sal_Int32 nPos = reinterpret_cast< typelib_EnumTypeDescription * >(
235 typeDescr )->nEnumValues;
236 while (nPos--)
237 {
238 if (pValues[ nPos ] == *static_cast< int const * >(val))
239 break;
240 }
241 if (nPos >= 0)
242 {
243 buf.append( reinterpret_cast< typelib_EnumTypeDescription * >(
244 typeDescr )->ppEnumNames[ nPos ] );
245 }
246 else
247 {
248 buf.appendAscii(
249 RTL_CONSTASCII_STRINGPARAM("?unknown enum value?")(&("?unknown enum value?")[0]), ((sal_Int32)(sizeof ("?unknown enum value?"
) / sizeof (("?unknown enum value?")[0]))-1) );
250 }
251 }
252 if (typeDescr != 0)
253 typelib_typedescription_release( typeDescr );
254 break;
255 }
256 case typelib_TypeClass_BOOLEAN:
257 if (*static_cast< sal_Bool const * >(val) != sal_False((sal_Bool)0))
5
←
Dereference of null pointer
258 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("true")(&("true")[0]), ((sal_Int32)(sizeof ("true") / sizeof (("true"
)[0]))-1) );
259 else
260 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("false")(&("false")[0]), ((sal_Int32)(sizeof ("false") / sizeof (
("false")[0]))-1) );
261 break;
262 case typelib_TypeClass_CHAR: {
263 buf.append( static_cast< sal_Unicode >('\'') );
264 sal_Unicode c = *static_cast< sal_Unicode const * >(val);
265 if (c == '\'')
266 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\\\'")(&("\\\'")[0]), ((sal_Int32)(sizeof ("\\\'") / sizeof (("\\\'"
)[0]))-1) );
267 else if (c == '\\')
268 buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\\\\")(&("\\\\")[0]), ((sal_Int32)(sizeof ("\\\\") / sizeof (("\\\\"
)[0]))-1) );
269 else
270 appendChar( buf, c );
271 buf.append( static_cast< sal_Unicode >('\'') );
272 break;
273 }
274 case typelib_TypeClass_FLOAT:
275 buf.append( *static_cast< float const * >(val) );
276 break;
277 case typelib_TypeClass_DOUBLE:
278 buf.append( *static_cast< double const * >(val) );
279 break;
280 case typelib_TypeClass_BYTE:
281 buf.append( static_cast< sal_Int32 >(
282 *static_cast< sal_Int8 const * >(val) ) );
283 break;
284 case typelib_TypeClass_SHORT:
285 buf.append( static_cast< sal_Int32 >(
286 *static_cast< sal_Int16 const * >(val) ) );
287 break;
288 case typelib_TypeClass_UNSIGNED_SHORT:
289 buf.append( static_cast< sal_Int32 >(
290 *static_cast< sal_uInt16 const * >(val) ) );
291 break;
292 case typelib_TypeClass_LONG:
293 buf.append( *static_cast< sal_Int32 const * >(val) );
294 break;
295 case typelib_TypeClass_UNSIGNED_LONG:
296 buf.append( static_cast< sal_Int64 >(
297 *static_cast< sal_uInt32 const * >(val) ) );
298 break;
299 case typelib_TypeClass_HYPER:
300 case typelib_TypeClass_UNSIGNED_HYPER:
301 buf.append( *static_cast< sal_Int64 const * >(val) );
302 break;
303// case typelib_TypeClass_UNION:
304// case typelib_TypeClass_ARRAY:
305// case typelib_TypeClass_UNKNOWN:
306// case typelib_TypeClass_SERVICE:
307// case typelib_TypeClass_MODULE:
308 default:
309 buf.append( static_cast< sal_Unicode >('?') );
310 break;
311 }
312}
313
314} // anon namespace
315
316//==============================================================================
317rtl::OUString anyToString( uno::Any const & value )
318{
319 rtl::OUStringBuffer buf;
320 appendValue( buf, value.getValue(), value.getValueTypeRef(), true );
1
Calling 'appendValue'
→
321 return buf.makeStringAndClear();
322}
323
324} // namespace comphelper
325
326/* vim:set shiftwidth=4 softtabstop=4 expandtab: */