summaryrefslogtreecommitdiff
path: root/clang/tools/libclang/CXSourceLocation.cpp
blob: a6bf8fcf1cc13700b0abf3cf695ec0fdb06e7f8c (about) (plain)
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
//===- CXSourceLocation.cpp - CXSourceLocations APIs ------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines routines for manipulating CXSourceLocations.
//
//===----------------------------------------------------------------------===//

#include "clang/Frontend/ASTUnit.h"

#include "CIndexer.h"
#include "CXString.h"
#include "CXSourceLocation.h"
#include "CXTranslationUnit.h"
#include "CXLoadedDiagnostic.h"

using namespace clang;
using namespace clang::cxstring;

//===----------------------------------------------------------------------===//
// Internal predicates on CXSourceLocations.
//===----------------------------------------------------------------------===//

static bool isASTUnitSourceLocation(const CXSourceLocation &L) {
  // If the lowest bit is clear then the first ptr_data entry is a SourceManager
  // pointer, or the CXSourceLocation is a null location.
  return ((uintptr_t)L.ptr_data[0] & 0x1) == 0;
}

//===----------------------------------------------------------------------===//
// Basic construction and comparison of CXSourceLocations and CXSourceRanges.
//===----------------------------------------------------------------------===//

extern "C" {
  
CXSourceLocation clang_getNullLocation() {
  CXSourceLocation Result = { { 0, 0 }, 0 };
  return Result;
}

unsigned clang_equalLocations(CXSourceLocation loc1, CXSourceLocation loc2) {
  return (loc1.ptr_data[0] == loc2.ptr_data[0] &&
          loc1.ptr_data[1] == loc2.ptr_data[1] &&
          loc1.int_data == loc2.int_data);
}

CXSourceRange clang_getNullRange() {
  CXSourceRange Result = { { 0, 0 }, 0, 0 };
  return Result;
}

CXSourceRange clang_getRange(CXSourceLocation begin, CXSourceLocation end) {
  if (!isASTUnitSourceLocation(begin)) {
    if (isASTUnitSourceLocation(end))
      return clang_getNullRange();
    CXSourceRange Result = { { begin.ptr_data[0], end.ptr_data[0] }, 0, 0 };
    return Result;
  }
  
  if (begin.ptr_data[0] != end.ptr_data[0] ||
      begin.ptr_data[1] != end.ptr_data[1])
    return clang_getNullRange();
  
  CXSourceRange Result = { { begin.ptr_data[0], begin.ptr_data[1] },
                           begin.int_data, end.int_data };

  return Result;
}

unsigned clang_equalRanges(CXSourceRange range1, CXSourceRange range2) {
  return range1.ptr_data[0] == range2.ptr_data[0]
    && range1.ptr_data[1] == range2.ptr_data[1]
    && range1.begin_int_data == range2.begin_int_data
    && range1.end_int_data == range2.end_int_data;
}

int clang_Range_isNull(CXSourceRange range) {
  return clang_equalRanges(range, clang_getNullRange());
}
  
  
CXSourceLocation clang_getRangeStart(CXSourceRange range) {
  // Special decoding for CXSourceLocations for CXLoadedDiagnostics.
  if ((uintptr_t)range.ptr_data[0] & 0x1) {
    CXSourceLocation Result = { { range.ptr_data[0], 0 }, 0 };
    return Result;    
  }
  
  CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] },
    range.begin_int_data };
  return Result;
}

CXSourceLocation clang_getRangeEnd(CXSourceRange range) {
  // Special decoding for CXSourceLocations for CXLoadedDiagnostics.
  if ((uintptr_t)range.ptr_data[0] & 0x1) {
    CXSourceLocation Result = { { range.ptr_data[1], 0 }, 0 };
    return Result;    
  }

  CXSourceLocation Result = { { range.ptr_data[0], range.ptr_data[1] },
    range.end_int_data };
  return Result;
}

} // end extern "C"

//===----------------------------------------------------------------------===//
//  Getting CXSourceLocations and CXSourceRanges from a translation unit.
//===----------------------------------------------------------------------===//

extern "C" {
  
CXSourceLocation clang_getLocation(CXTranslationUnit tu,
                                   CXFile file,
                                   unsigned line,
                                   unsigned column) {
  if (!tu || !file)
    return clang_getNullLocation();
  
  bool Logging = ::getenv("LIBCLANG_LOGGING");
  ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu->TUData);
  ASTUnit::ConcurrencyCheck Check(*CXXUnit);
  const FileEntry *File = static_cast<const FileEntry *>(file);
  SourceLocation SLoc = CXXUnit->getLocation(File, line, column);
  if (SLoc.isInvalid()) {
    if (Logging)
      llvm::errs() << "clang_getLocation(\"" << File->getName() 
      << "\", " << line << ", " << column << ") = invalid\n";
    return clang_getNullLocation();
  }
  
  if (Logging)
    llvm::errs() << "clang_getLocation(\"" << File->getName() 
    << "\", " << line << ", " << column << ") = " 
    << SLoc.getRawEncoding() << "\n";
  
  return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
}
  
CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu,
                                            CXFile file,
                                            unsigned offset) {
  if (!tu || !file)
    return clang_getNullLocation();
  
  ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu->TUData);

  SourceLocation SLoc 
    = CXXUnit->getLocation(static_cast<const FileEntry *>(file), offset);

  if (SLoc.isInvalid())
    return clang_getNullLocation();
  
  return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
}

} // end extern "C"

//===----------------------------------------------------------------------===//
// Routines for expanding and manipulating CXSourceLocations, regardless
// of their origin.
//===----------------------------------------------------------------------===//

static void createNullLocation(CXFile *file, unsigned *line,
                               unsigned *column, unsigned *offset) {
  if (file)
    *file = 0;
  if (line)
    *line = 0;
  if (column)
    *column = 0;
  if (offset)
    *offset = 0;
  return;
}

static void createNullLocation(CXString *filename, unsigned *line,
                               unsigned *column, unsigned *offset = 0) {
  if (filename)
    *filename = createCXString("");
  if (line)
    *line = 0;
  if (column)
    *column = 0;
  if (offset)
    *offset = 0;
  return;
}

extern "C" {

void clang_getExpansionLocation(CXSourceLocation location,
                                CXFile *file,
                                unsigned *line,
                                unsigned *column,
                                unsigned *offset) {
  
  if (!isASTUnitSourceLocation(location)) {
    CXLoadedDiagnostic::decodeLocation(location, file, line, column, offset);
    return;
  }

  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);

  if (!location.ptr_data[0] || Loc.isInvalid()) {
    createNullLocation(file, line, column, offset);
    return;
  }

  const SourceManager &SM =
  *static_cast<const SourceManager*>(location.ptr_data[0]);
  SourceLocation ExpansionLoc = SM.getExpansionLoc(Loc);
  
  // Check that the FileID is invalid on the expansion location.
  // This can manifest in invalid code.
  FileID fileID = SM.getFileID(ExpansionLoc);
  bool Invalid = false;
  const SrcMgr::SLocEntry &sloc = SM.getSLocEntry(fileID, &Invalid);
  if (Invalid || !sloc.isFile()) {
    createNullLocation(file, line, column, offset);
    return;
  }
  
  if (file)
    *file = (void *)SM.getFileEntryForSLocEntry(sloc);
  if (line)
    *line = SM.getExpansionLineNumber(ExpansionLoc);
  if (column)
    *column = SM.getExpansionColumnNumber(ExpansionLoc);
  if (offset)
    *offset = SM.getDecomposedLoc(ExpansionLoc).second;
}

void clang_getPresumedLocation(CXSourceLocation location,
                               CXString *filename,
                               unsigned *line,
                               unsigned *column) {
  
  if (!isASTUnitSourceLocation(location)) {
    // Other SourceLocation implementations do not support presumed locations
    // at this time.
    createNullLocation(filename, line, column);
    return;
  }

  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);

  if (!location.ptr_data[0] || Loc.isInvalid())
    createNullLocation(filename, line, column);
  else {
    const SourceManager &SM =
    *static_cast<const SourceManager*>(location.ptr_data[0]);
    PresumedLoc PreLoc = SM.getPresumedLoc(Loc);
    
    if (filename)
      *filename = createCXString(PreLoc.getFilename());
    if (line)
      *line = PreLoc.getLine();
    if (column)
      *column = PreLoc.getColumn();
  }
}

void clang_getInstantiationLocation(CXSourceLocation location,
                                    CXFile *file,
                                    unsigned *line,
                                    unsigned *column,
                                    unsigned *offset) {
  // Redirect to new API.
  clang_getExpansionLocation(location, file, line, column, offset);
}

void clang_getSpellingLocation(CXSourceLocation location,
                               CXFile *file,
                               unsigned *line,
                               unsigned *column,
                               unsigned *offset) {
  
  if (!isASTUnitSourceLocation(location)) {
    CXLoadedDiagnostic::decodeLocation(location, file, line,
                                           column, offset);
    return;
  }
  
  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
  
  if (!location.ptr_data[0] || Loc.isInvalid())
    return createNullLocation(file, line, column, offset);
  
  const SourceManager &SM =
  *static_cast<const SourceManager*>(location.ptr_data[0]);
  SourceLocation SpellLoc = Loc;
  if (SpellLoc.isMacroID()) {
    SourceLocation SimpleSpellingLoc = SM.getImmediateSpellingLoc(SpellLoc);
    if (SimpleSpellingLoc.isFileID() &&
        SM.getFileEntryForID(SM.getDecomposedLoc(SimpleSpellingLoc).first))
      SpellLoc = SimpleSpellingLoc;
    else
      SpellLoc = SM.getExpansionLoc(SpellLoc);
  }
  
  std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(SpellLoc);
  FileID FID = LocInfo.first;
  unsigned FileOffset = LocInfo.second;
  
  if (FID.isInvalid())
    return createNullLocation(file, line, column, offset);
  
  if (file)
    *file = (void *)SM.getFileEntryForID(FID);
  if (line)
    *line = SM.getLineNumber(FID, FileOffset);
  if (column)
    *column = SM.getColumnNumber(FID, FileOffset);
  if (offset)
    *offset = FileOffset;
}

} // end extern "C"