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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* Based on LLVM/Clang.
*
* This file is distributed under the University of Illinois Open Source
* License. See LICENSE.TXT for details.
*
*/
#include "plugin.hxx"
#include "check.hxx"
#include <regex>
/**
* Changes calls to tools::Rectangle/Point/Size methods that return a ref to instead call the setter methods.
*
* run as:
* make COMPILER_PLUGIN_TOOL=changetoolsgen UPDATE_FILES=all FORCE_COMPILE_ALL=1
* or
* make <module> COMPILER_PLUGIN_TOOL=changetoolsgen FORCE_COMPILE_ALL=1
*/
namespace
{
class ChangeToolsGen : public loplugin::FilteringRewritePlugin<ChangeToolsGen>
{
public:
explicit ChangeToolsGen(loplugin::InstantiationData const& data)
: FilteringRewritePlugin(data)
{
}
virtual void run() override;
bool VisitCXXMemberCallExpr(CXXMemberCallExpr const* call);
private:
bool ChangeAssignment(Stmt const* parent, std::string const& methodName,
std::string const& setPrefix);
bool ChangeBinaryOperatorPlusMinus(BinaryOperator const* parent, CXXMemberCallExpr const* call,
std::string const& methodName);
bool ChangeBinaryOperatorOther(BinaryOperator const* parent, CXXMemberCallExpr const* call,
std::string const& methodName, std::string const& setPrefix);
bool ChangeUnaryOperator(UnaryOperator const* parent, CXXMemberCallExpr const* call,
std::string const& methodName);
std::string extractCode(SourceLocation startLoc, SourceLocation endLoc);
};
void ChangeToolsGen::run() { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
bool ChangeToolsGen::VisitCXXMemberCallExpr(CXXMemberCallExpr const* call)<--- The function 'VisitCXXMemberCallExpr' is never used.
{
if (ignoreLocation(call))
return true;
const CXXMethodDecl* func = call->getMethodDecl();
if (!func)
return true;
if (func->isConst())
return true;
auto dc = loplugin::DeclCheck(func);
std::string methodName;
std::string setPrefix;
if (dc.Function("Top").Class("Rectangle").Namespace("tools").GlobalNamespace())
{
methodName = "Top";
setPrefix = "Set";
}
else if (dc.Function("Bottom").Class("Rectangle").Namespace("tools").GlobalNamespace())
{
methodName = "Bottom";
setPrefix = "Set";
}
else if (dc.Function("Left").Class("Rectangle").Namespace("tools").GlobalNamespace())
{
methodName = "Left";
setPrefix = "Set";
}
else if (dc.Function("Right").Class("Rectangle").Namespace("tools").GlobalNamespace())
{
methodName = "Right";
setPrefix = "Set";
}
else if (dc.Function("X").Class("Point").GlobalNamespace())
{
methodName = "X";
setPrefix = "set";
}
else if (dc.Function("Y").Class("Point").GlobalNamespace())
{
methodName = "Y";
setPrefix = "set";
}
else if (dc.Function("Width").Class("Size").GlobalNamespace())
{
methodName = "Width";
setPrefix = "set";
}
else if (dc.Function("Height").Class("Size").GlobalNamespace())
{
methodName = "Height";
setPrefix = "set";
}
else
return true;
if (!loplugin::TypeCheck(func->getReturnType()).LvalueReference())
return true;
auto parent = getParentStmt(call);
if (!parent)
return true;
if (auto unaryOp = dyn_cast<UnaryOperator>(parent))
{
if (!ChangeUnaryOperator(unaryOp, call, methodName))
report(DiagnosticsEngine::Warning, "Could not fix, unary", compat::getBeginLoc(call));
return true;
}
auto binaryOp = dyn_cast<BinaryOperator>(parent);
if (!binaryOp)
{
// normal getter
return true;
}
auto opcode = binaryOp->getOpcode();
if (opcode == BO_Assign)
{
// Check for assignments embedded inside other expressions
auto parent2 = getParentStmt(parent);
if (dyn_cast_or_null<ExprWithCleanups>(parent2))
parent2 = getParentStmt(parent2);
if (parent2 && isa<Expr>(parent2))
{
report(DiagnosticsEngine::Warning, "Could not fix, embedded assign",
compat::getBeginLoc(call));
return true;
}
// Check for
// X.Width() = X.Height() = 1;
if (auto rhs = dyn_cast<BinaryOperator>(binaryOp->getRHS()->IgnoreParenImpCasts()))
if (rhs->getOpcode() == BO_Assign)
{
report(DiagnosticsEngine::Warning, "Could not fix, double assign",
compat::getBeginLoc(call));
return true;
}
if (!ChangeAssignment(parent, methodName, setPrefix))
report(DiagnosticsEngine::Warning, "Could not fix, assign", compat::getBeginLoc(call));
return true;
}
if (opcode == BO_AddAssign || opcode == BO_SubAssign)
{
if (!ChangeBinaryOperatorPlusMinus(binaryOp, call, methodName))
report(DiagnosticsEngine::Warning, "Could not fix, assign-and-change",
compat::getBeginLoc(call));
return true;
}
else if (opcode == BO_RemAssign || opcode == BO_MulAssign || opcode == BO_DivAssign)
{
if (!ChangeBinaryOperatorOther(binaryOp, call, methodName, setPrefix))
report(DiagnosticsEngine::Warning, "Could not fix, assign-and-change",
compat::getBeginLoc(call));
return true;
}
else
assert(false);
return true;
}
bool ChangeToolsGen::ChangeAssignment(Stmt const* parent, std::string const& methodName,
std::string const& setPrefix)
{
// Look for expressions like
// aRect.Left() = ...;
// and replace with
// aRect.SetLeft( ... );
SourceManager& SM = compiler.getSourceManager();
SourceLocation startLoc = SM.getExpansionLoc(compat::getBeginLoc(parent));
SourceLocation endLoc = SM.getExpansionLoc(compat::getEndLoc(parent));
const char* p1 = SM.getCharacterData(startLoc);
const char* p2 = SM.getCharacterData(endLoc);
unsigned n = Lexer::MeasureTokenLength(endLoc, SM, compiler.getLangOpts());
if (p2 < p1) // clang is misbehaving, appears to be macro constant related
return false;
std::string callText(p1, p2 - p1 + n);
auto originalLength = callText.size();
auto newText = std::regex_replace(callText, std::regex(methodName + " *\\( *\\) *="),
setPrefix + methodName + "(");
if (newText == callText)
return false;
newText += " )";
return replaceText(startLoc, originalLength, newText);
}
bool ChangeToolsGen::ChangeBinaryOperatorPlusMinus(BinaryOperator const* binaryOp,
CXXMemberCallExpr const* call,
std::string const& methodName)
{
// Look for expressions like
// aRect.Left() += ...;
// and replace with
// aRect.MoveLeft( ... );
SourceManager& SM = compiler.getSourceManager();
SourceLocation startLoc = SM.getExpansionLoc(compat::getBeginLoc(binaryOp));
SourceLocation endLoc = SM.getExpansionLoc(compat::getEndLoc(binaryOp));
const char* p1 = SM.getCharacterData(startLoc);
const char* p2 = SM.getCharacterData(endLoc);
if (p2 < p1) // clang is misbehaving, appears to be macro constant related
return false;
unsigned n = Lexer::MeasureTokenLength(endLoc, SM, compiler.getLangOpts());
std::string callText(p1, p2 - p1 + n);
auto originalLength = callText.size();
std::string newText;
if (binaryOp->getOpcode() == BO_AddAssign)
{
newText = std::regex_replace(callText, std::regex(methodName + " *\\( *\\) *\\+= *"),
"Adjust" + methodName + "(");
newText += " )";
}
else
{
newText = std::regex_replace(callText, std::regex(methodName + " *\\( *\\) *\\-= *"),
"Adjust" + methodName + "( -(");
newText += ") )";
}
if (newText == callText)
{
report(DiagnosticsEngine::Warning, "binaryop-plusminus regex match failed",
compat::getBeginLoc(call));
return false;
}
return replaceText(startLoc, originalLength, newText);
}
bool ChangeToolsGen::ChangeBinaryOperatorOther(BinaryOperator const* binaryOp,
CXXMemberCallExpr const* call,
std::string const& methodName,
std::string const& setPrefix)
{
// Look for expressions like
// aRect.Left() += ...;
// and replace with
// aRect.SetLeft( aRect.GetLeft() + ... );
SourceManager& SM = compiler.getSourceManager();
SourceLocation startLoc = SM.getExpansionLoc(compat::getBeginLoc(binaryOp));
SourceLocation endLoc = SM.getExpansionLoc(compat::getEndLoc(binaryOp));
const char* p1 = SM.getCharacterData(startLoc);
const char* p2 = SM.getCharacterData(endLoc);
if (p2 < p1) // clang is misbehaving, appears to be macro constant related
return false;
unsigned n = Lexer::MeasureTokenLength(endLoc, SM, compiler.getLangOpts());
std::string callText(p1, p2 - p1 + n);
auto originalLength = callText.size();
std::string regexOpname;
std::string replaceOpname;
switch (binaryOp->getOpcode())
{
case BO_RemAssign:
regexOpname = "\\%=";
replaceOpname = "%";
break;
case BO_MulAssign:
regexOpname = "\\*=";
replaceOpname = "*";
break;
case BO_DivAssign:
regexOpname = "\\/=";
replaceOpname = "/";
break;
default:
assert(false);
}
auto implicitObjectText = extractCode(call->getImplicitObjectArgument()->getExprLoc(),
call->getImplicitObjectArgument()->getExprLoc());
std::string reString(methodName + " *\\( *\\) *" + regexOpname);
auto newText = std::regex_replace(callText, std::regex(reString),
setPrefix + methodName + "( " + implicitObjectText + "."
+ methodName + "() " + replaceOpname + " (");
if (newText == callText)
{
report(DiagnosticsEngine::Warning, "binaryop-other regex match failed %0",
compat::getBeginLoc(call))
<< reString;
return false;
}
// sometimes we end up with duplicate spaces after the opname
newText
= std::regex_replace(newText, std::regex(methodName + "\\(\\) \\" + replaceOpname + " "),
methodName + "() " + replaceOpname + " ");
newText += ") )";
return replaceText(startLoc, originalLength, newText);
}
bool ChangeToolsGen::ChangeUnaryOperator(UnaryOperator const* unaryOp,
CXXMemberCallExpr const* call,
std::string const& methodName)
{
// Look for expressions like
// aRect.Left()++;
// ++aRect.Left();
// and replace with
// aRect.MoveLeft( 1 );
SourceManager& SM = compiler.getSourceManager();
SourceLocation startLoc = SM.getExpansionLoc(compat::getBeginLoc(unaryOp));
SourceLocation endLoc = SM.getExpansionLoc(compat::getEndLoc(unaryOp));
const char* p1 = SM.getCharacterData(startLoc);
const char* p2 = SM.getCharacterData(endLoc);
if (p2 < p1) // clang is misbehaving, appears to be macro constant related
return false;
unsigned n = Lexer::MeasureTokenLength(endLoc, SM, compiler.getLangOpts());
std::string callText(p1, p2 - p1 + n);
auto originalLength = callText.size();
auto implicitObjectText = extractCode(call->getImplicitObjectArgument()->getExprLoc(),
call->getImplicitObjectArgument()->getExprLoc());
auto op = unaryOp->getOpcode();
std::string regexOpname;
std::string replaceOp;
switch (op)
{
case UO_PostInc:
case UO_PreInc:
replaceOp = "1";
regexOpname = "\\+\\+";
break;
case UO_PostDec:
case UO_PreDec:
replaceOp = "-1";
regexOpname = "\\-\\-";
break;
default:
assert(false);
}
std::string newText;
std::string reString;
if (op == UO_PostInc || op == UO_PostDec)
{
reString = methodName + " *\\( *\\) *" + regexOpname;
newText = std::regex_replace(callText, std::regex(reString),
"Adjust" + methodName + "( " + replaceOp);
}
else
{
newText = implicitObjectText + "." + "Adjust" + methodName + "( " + replaceOp;
}
if (newText == callText)
{
report(DiagnosticsEngine::Warning, "unaryop regex match failed %0",
compat::getBeginLoc(call))
<< reString;
return false;
}
newText += " )";
return replaceText(startLoc, originalLength, newText);
}
std::string ChangeToolsGen::extractCode(SourceLocation startLoc, SourceLocation endLoc)
{
SourceManager& SM = compiler.getSourceManager();
const char* p1 = SM.getCharacterData(SM.getExpansionLoc(startLoc));
const char* p2 = SM.getCharacterData(SM.getExpansionLoc(endLoc));
unsigned n = Lexer::MeasureTokenLength(endLoc, SM, compiler.getLangOpts());
return std::string(p1, p2 - p1 + n);
}
static loplugin::Plugin::Registration<ChangeToolsGen> X("changetoolsgen", false);
} // namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|