1 //===--- TextDiagnosticPrinter.cpp - Diagnostic Printer -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This diagnostic client prints out their diagnostic messages.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Frontend/TextDiagnosticPrinter.h"
15 #include "clang/Basic/FileManager.h"
16 #include "clang/Basic/SourceManager.h"
17 #include "clang/Frontend/DiagnosticOptions.h"
18 #include "clang/Lex/Lexer.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include "llvm/ADT/SmallString.h"
22 #include "llvm/ADT/StringExtras.h"
24 using namespace clang;
26 static const enum llvm::raw_ostream::Colors noteColor =
27 llvm::raw_ostream::BLACK;
28 static const enum llvm::raw_ostream::Colors fixitColor =
29 llvm::raw_ostream::GREEN;
30 static const enum llvm::raw_ostream::Colors caretColor =
31 llvm::raw_ostream::GREEN;
32 static const enum llvm::raw_ostream::Colors warningColor =
33 llvm::raw_ostream::MAGENTA;
34 static const enum llvm::raw_ostream::Colors errorColor = llvm::raw_ostream::RED;
35 static const enum llvm::raw_ostream::Colors fatalColor = llvm::raw_ostream::RED;
36 // Used for changing only the bold attribute.
37 static const enum llvm::raw_ostream::Colors savedColor =
38 llvm::raw_ostream::SAVEDCOLOR;
40 /// \brief Number of spaces to indent when word-wrapping.
41 const unsigned WordWrapIndentation = 6;
43 TextDiagnosticPrinter::TextDiagnosticPrinter(llvm::raw_ostream &os,
44 const DiagnosticOptions &diags,
45 bool _OwnsOutputStream)
46 : OS(os), LangOpts(0), DiagOpts(&diags),
47 LastCaretDiagnosticWasNote(0),
48 OwnsOutputStream(_OwnsOutputStream) {
51 TextDiagnosticPrinter::~TextDiagnosticPrinter() {
56 void TextDiagnosticPrinter::PrintIncludeStack(Diagnostic::Level Level,
58 const SourceManager &SM) {
59 if (!DiagOpts->ShowNoteIncludeStack && Level == Diagnostic::Note) return;
61 if (Loc.isInvalid()) return;
63 PresumedLoc PLoc = SM.getPresumedLoc(Loc);
67 // Print out the other include frames first.
68 PrintIncludeStack(Level, PLoc.getIncludeLoc(), SM);
70 if (DiagOpts->ShowLocation)
71 OS << "In file included from " << PLoc.getFilename()
72 << ':' << PLoc.getLine() << ":\n";
74 OS << "In included file:\n";
77 /// HighlightRange - Given a SourceRange and a line number, highlight (with ~'s)
78 /// any characters in LineNo that intersect the SourceRange.
79 void TextDiagnosticPrinter::HighlightRange(const CharSourceRange &R,
80 const SourceManager &SM,
81 unsigned LineNo, FileID FID,
82 std::string &CaretLine,
83 const std::string &SourceLine) {
84 assert(CaretLine.size() == SourceLine.size() &&
85 "Expect a correspondence between source and caret line!");
86 if (!R.isValid()) return;
88 SourceLocation Begin = SM.getInstantiationLoc(R.getBegin());
89 SourceLocation End = SM.getInstantiationLoc(R.getEnd());
91 // If the End location and the start location are the same and are a macro
92 // location, then the range was something that came from a macro expansion
93 // or _Pragma. If this is an object-like macro, the best we can do is to
94 // highlight the range. If this is a function-like macro, we'd also like to
95 // highlight the arguments.
96 if (Begin == End && R.getEnd().isMacroID())
97 End = SM.getInstantiationRange(R.getEnd()).second;
99 unsigned StartLineNo = SM.getInstantiationLineNumber(Begin);
100 if (StartLineNo > LineNo || SM.getFileID(Begin) != FID)
101 return; // No intersection.
103 unsigned EndLineNo = SM.getInstantiationLineNumber(End);
104 if (EndLineNo < LineNo || SM.getFileID(End) != FID)
105 return; // No intersection.
107 // Compute the column number of the start.
108 unsigned StartColNo = 0;
109 if (StartLineNo == LineNo) {
110 StartColNo = SM.getInstantiationColumnNumber(Begin);
111 if (StartColNo) --StartColNo; // Zero base the col #.
114 // Compute the column number of the end.
115 unsigned EndColNo = CaretLine.size();
116 if (EndLineNo == LineNo) {
117 EndColNo = SM.getInstantiationColumnNumber(End);
119 --EndColNo; // Zero base the col #.
121 // Add in the length of the token, so that we cover multi-char tokens if
122 // this is a token range.
123 if (R.isTokenRange())
124 EndColNo += Lexer::MeasureTokenLength(End, SM, *LangOpts);
126 EndColNo = CaretLine.size();
130 assert(StartColNo <= EndColNo && "Invalid range!");
132 // Check that a token range does not highlight only whitespace.
133 if (R.isTokenRange()) {
134 // Pick the first non-whitespace column.
135 while (StartColNo < SourceLine.size() &&
136 (SourceLine[StartColNo] == ' ' || SourceLine[StartColNo] == '\t'))
139 // Pick the last non-whitespace column.
140 if (EndColNo > SourceLine.size())
141 EndColNo = SourceLine.size();
143 (SourceLine[EndColNo-1] == ' ' || SourceLine[EndColNo-1] == '\t'))
146 // If the start/end passed each other, then we are trying to highlight a
147 // range that just exists in whitespace, which must be some sort of other
149 assert(StartColNo <= EndColNo && "Trying to highlight whitespace??");
152 // Fill the range with ~'s.
153 for (unsigned i = StartColNo; i < EndColNo; ++i)
157 /// \brief When the source code line we want to print is too long for
158 /// the terminal, select the "interesting" region.
159 static void SelectInterestingSourceRegion(std::string &SourceLine,
160 std::string &CaretLine,
161 std::string &FixItInsertionLine,
162 unsigned EndOfCaretToken,
164 unsigned MaxSize = std::max(SourceLine.size(),
165 std::max(CaretLine.size(),
166 FixItInsertionLine.size()));
167 if (MaxSize > SourceLine.size())
168 SourceLine.resize(MaxSize, ' ');
169 if (MaxSize > CaretLine.size())
170 CaretLine.resize(MaxSize, ' ');
171 if (!FixItInsertionLine.empty() && MaxSize > FixItInsertionLine.size())
172 FixItInsertionLine.resize(MaxSize, ' ');
174 // Find the slice that we need to display the full caret line
176 unsigned CaretStart = 0, CaretEnd = CaretLine.size();
177 for (; CaretStart != CaretEnd; ++CaretStart)
178 if (!isspace(CaretLine[CaretStart]))
181 for (; CaretEnd != CaretStart; --CaretEnd)
182 if (!isspace(CaretLine[CaretEnd - 1]))
185 // Make sure we don't chop the string shorter than the caret token
187 if (CaretEnd < EndOfCaretToken)
188 CaretEnd = EndOfCaretToken;
190 // If we have a fix-it line, make sure the slice includes all of the
191 // fix-it information.
192 if (!FixItInsertionLine.empty()) {
193 unsigned FixItStart = 0, FixItEnd = FixItInsertionLine.size();
194 for (; FixItStart != FixItEnd; ++FixItStart)
195 if (!isspace(FixItInsertionLine[FixItStart]))
198 for (; FixItEnd != FixItStart; --FixItEnd)
199 if (!isspace(FixItInsertionLine[FixItEnd - 1]))
202 if (FixItStart < CaretStart)
203 CaretStart = FixItStart;
204 if (FixItEnd > CaretEnd)
208 // CaretLine[CaretStart, CaretEnd) contains all of the interesting
209 // parts of the caret line. While this slice is smaller than the
210 // number of columns we have, try to grow the slice to encompass
213 // If the end of the interesting region comes before we run out of
214 // space in the terminal, start at the beginning of the line.
215 if (Columns > 3 && CaretEnd < Columns - 3)
218 unsigned TargetColumns = Columns;
219 if (TargetColumns > 8)
220 TargetColumns -= 8; // Give us extra room for the ellipses.
221 unsigned SourceLength = SourceLine.size();
222 while ((CaretEnd - CaretStart) < TargetColumns) {
223 bool ExpandedRegion = false;
224 // Move the start of the interesting region left until we've
225 // pulled in something else interesting.
228 else if (CaretStart > 1) {
229 unsigned NewStart = CaretStart - 1;
231 // Skip over any whitespace we see here; we're looking for
232 // another bit of interesting text.
233 while (NewStart && isspace(SourceLine[NewStart]))
236 // Skip over this bit of "interesting" text.
237 while (NewStart && !isspace(SourceLine[NewStart]))
240 // Move up to the non-whitespace character we just saw.
244 // If we're still within our limit, update the starting
245 // position within the source/caret line.
246 if (CaretEnd - NewStart <= TargetColumns) {
247 CaretStart = NewStart;
248 ExpandedRegion = true;
252 // Move the end of the interesting region right until we've
253 // pulled in something else interesting.
254 if (CaretEnd != SourceLength) {
255 assert(CaretEnd < SourceLength && "Unexpected caret position!");
256 unsigned NewEnd = CaretEnd;
258 // Skip over any whitespace we see here; we're looking for
259 // another bit of interesting text.
260 while (NewEnd != SourceLength && isspace(SourceLine[NewEnd - 1]))
263 // Skip over this bit of "interesting" text.
264 while (NewEnd != SourceLength && !isspace(SourceLine[NewEnd - 1]))
267 if (NewEnd - CaretStart <= TargetColumns) {
269 ExpandedRegion = true;
277 // [CaretStart, CaretEnd) is the slice we want. Update the various
278 // output lines to show only this slice, with two-space padding
279 // before the lines so that it looks nicer.
280 if (CaretEnd < SourceLine.size())
281 SourceLine.replace(CaretEnd, std::string::npos, "...");
282 if (CaretEnd < CaretLine.size())
283 CaretLine.erase(CaretEnd, std::string::npos);
284 if (FixItInsertionLine.size() > CaretEnd)
285 FixItInsertionLine.erase(CaretEnd, std::string::npos);
287 if (CaretStart > 2) {
288 SourceLine.replace(0, CaretStart, " ...");
289 CaretLine.replace(0, CaretStart, " ");
290 if (FixItInsertionLine.size() >= CaretStart)
291 FixItInsertionLine.replace(0, CaretStart, " ");
295 void TextDiagnosticPrinter::EmitCaretDiagnostic(Diagnostic::Level Level,
297 CharSourceRange *Ranges,
299 const SourceManager &SM,
300 const FixItHint *Hints,
303 unsigned OnMacroInst,
304 unsigned MacroSkipStart,
305 unsigned MacroSkipEnd) {
306 assert(LangOpts && "Unexpected diagnostic outside source file processing");
307 assert(!Loc.isInvalid() && "must have a valid source location here");
309 // If this is a macro ID, first emit information about where this was
310 // instantiated (recursively) then emit information about where the token was
312 if (!Loc.isFileID()) {
313 // Whether to suppress printing this macro instantiation.
315 = OnMacroInst >= MacroSkipStart && OnMacroInst < MacroSkipEnd;
318 SourceLocation OneLevelUp = SM.getImmediateInstantiationRange(Loc).first;
319 // FIXME: Map ranges?
320 EmitCaretDiagnostic(Level, OneLevelUp, Ranges, NumRanges, SM, 0, 0, Columns,
321 OnMacroInst + 1, MacroSkipStart, MacroSkipEnd);
324 Loc = SM.getImmediateSpellingLoc(Loc);
327 for (unsigned i = 0; i != NumRanges; ++i) {
328 CharSourceRange &R = Ranges[i];
329 SourceLocation S = R.getBegin(), E = R.getEnd();
331 R.setBegin(SM.getImmediateSpellingLoc(S));
333 R.setEnd(SM.getImmediateSpellingLoc(E));
337 // Get the pretty name, according to #line directives etc.
338 PresumedLoc PLoc = SM.getPresumedLoc(Loc);
339 if (PLoc.isInvalid())
342 // If this diagnostic is not in the main file, print out the
343 // "included from" lines.
344 if (LastWarningLoc != PLoc.getIncludeLoc()) {
345 LastWarningLoc = PLoc.getIncludeLoc();
346 PrintIncludeStack(Diagnostic::Note, LastWarningLoc, SM);
349 if (DiagOpts->ShowLocation) {
350 // Emit the file/line/column that this expansion came from.
351 OS << PLoc.getFilename() << ':' << PLoc.getLine() << ':';
352 if (DiagOpts->ShowColumn)
353 OS << PLoc.getColumn() << ':';
356 OS << "note: instantiated from:\n";
358 EmitCaretDiagnostic(Level, Loc, Ranges, NumRanges, SM, Hints, NumHints,
359 Columns, OnMacroInst + 1, MacroSkipStart,
364 if (OnMacroInst == MacroSkipStart) {
365 // Tell the user that we've skipped contexts.
366 OS << "note: (skipping " << (MacroSkipEnd - MacroSkipStart)
367 << " contexts in backtrace; use -fmacro-backtrace-limit=0 to see "
374 // Decompose the location into a FID/Offset pair.
375 std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
376 FileID FID = LocInfo.first;
377 unsigned FileOffset = LocInfo.second;
379 // Get information about the buffer it points into.
380 bool Invalid = false;
381 const char *BufStart = SM.getBufferData(FID, &Invalid).data();
385 unsigned ColNo = SM.getColumnNumber(FID, FileOffset);
386 unsigned CaretEndColNo
387 = ColNo + Lexer::MeasureTokenLength(Loc, SM, *LangOpts);
389 // Rewind from the current position to the start of the line.
390 const char *TokPtr = BufStart+FileOffset;
391 const char *LineStart = TokPtr-ColNo+1; // Column # is 1-based.
394 // Compute the line end. Scan forward from the error position to the end of
396 const char *LineEnd = TokPtr;
397 while (*LineEnd != '\n' && *LineEnd != '\r' && *LineEnd != '\0')
400 // FIXME: This shouldn't be necessary, but the CaretEndColNo can extend past
401 // the source line length as currently being computed. See
402 // test/Misc/message-length.c.
403 CaretEndColNo = std::min(CaretEndColNo, unsigned(LineEnd - LineStart));
405 // Copy the line of code into an std::string for ease of manipulation.
406 std::string SourceLine(LineStart, LineEnd);
408 // Create a line for the caret that is filled with spaces that is the same
409 // length as the line of source code.
410 std::string CaretLine(LineEnd-LineStart, ' ');
412 // Highlight all of the characters covered by Ranges with ~ characters.
414 unsigned LineNo = SM.getLineNumber(FID, FileOffset);
416 for (unsigned i = 0, e = NumRanges; i != e; ++i)
417 HighlightRange(Ranges[i], SM, LineNo, FID, CaretLine, SourceLine);
420 // Next, insert the caret itself.
421 if (ColNo-1 < CaretLine.size())
422 CaretLine[ColNo-1] = '^';
424 CaretLine.push_back('^');
426 // Scan the source line, looking for tabs. If we find any, manually expand
427 // them to spaces and update the CaretLine to match.
428 for (unsigned i = 0; i != SourceLine.size(); ++i) {
429 if (SourceLine[i] != '\t') continue;
431 // Replace this tab with at least one space.
434 // Compute the number of spaces we need to insert.
435 unsigned TabStop = DiagOpts->TabStop;
436 assert(0 < TabStop && TabStop <= DiagnosticOptions::MaxTabStop &&
437 "Invalid -ftabstop value");
438 unsigned NumSpaces = ((i+TabStop)/TabStop * TabStop) - (i+1);
439 assert(NumSpaces < TabStop && "Invalid computation of space amt");
441 // Insert spaces into the SourceLine.
442 SourceLine.insert(i+1, NumSpaces, ' ');
444 // Insert spaces or ~'s into CaretLine.
445 CaretLine.insert(i+1, NumSpaces, CaretLine[i] == '~' ? '~' : ' ');
448 // If we are in -fdiagnostics-print-source-range-info mode, we are trying to
449 // produce easily machine parsable output. Add a space before the source line
450 // and the caret to make it trivial to tell the main diagnostic line from what
451 // the user is intended to see.
452 if (DiagOpts->ShowSourceRanges) {
453 SourceLine = ' ' + SourceLine;
454 CaretLine = ' ' + CaretLine;
457 std::string FixItInsertionLine;
458 if (NumHints && DiagOpts->ShowFixits) {
459 for (const FixItHint *Hint = Hints, *LastHint = Hints + NumHints;
460 Hint != LastHint; ++Hint) {
461 if (!Hint->CodeToInsert.empty()) {
462 // We have an insertion hint. Determine whether the inserted
463 // code is on the same line as the caret.
464 std::pair<FileID, unsigned> HintLocInfo
465 = SM.getDecomposedInstantiationLoc(Hint->RemoveRange.getBegin());
466 if (SM.getLineNumber(HintLocInfo.first, HintLocInfo.second) ==
467 SM.getLineNumber(FID, FileOffset)) {
468 // Insert the new code into the line just below the code
469 // that the user wrote.
471 = SM.getColumnNumber(HintLocInfo.first, HintLocInfo.second);
472 unsigned LastColumnModified
473 = HintColNo - 1 + Hint->CodeToInsert.size();
474 if (LastColumnModified > FixItInsertionLine.size())
475 FixItInsertionLine.resize(LastColumnModified, ' ');
476 std::copy(Hint->CodeToInsert.begin(), Hint->CodeToInsert.end(),
477 FixItInsertionLine.begin() + HintColNo - 1);
479 FixItInsertionLine.clear();
484 // Now that we have the entire fixit line, expand the tabs in it.
485 // Since we don't want to insert spaces in the middle of a word,
486 // find each word and the column it should line up with and insert
487 // spaces until they match.
488 if (!FixItInsertionLine.empty()) {
489 unsigned FixItPos = 0;
490 unsigned LinePos = 0;
491 unsigned TabExpandedCol = 0;
492 unsigned LineLength = LineEnd - LineStart;
494 while (FixItPos < FixItInsertionLine.size() && LinePos < LineLength) {
495 // Find the next word in the FixIt line.
496 while (FixItPos < FixItInsertionLine.size() &&
497 FixItInsertionLine[FixItPos] == ' ')
499 unsigned CharDistance = FixItPos - TabExpandedCol;
501 // Walk forward in the source line, keeping track of
502 // the tab-expanded column.
503 for (unsigned I = 0; I < CharDistance; ++I, ++LinePos)
504 if (LinePos >= LineLength || LineStart[LinePos] != '\t')
508 (TabExpandedCol/DiagOpts->TabStop + 1) * DiagOpts->TabStop;
510 // Adjust the fixit line to match this column.
511 FixItInsertionLine.insert(FixItPos, TabExpandedCol-FixItPos, ' ');
512 FixItPos = TabExpandedCol;
514 // Walk to the end of the word.
515 while (FixItPos < FixItInsertionLine.size() &&
516 FixItInsertionLine[FixItPos] != ' ')
522 // If the source line is too long for our terminal, select only the
523 // "interesting" source region within that line.
524 if (Columns && SourceLine.size() > Columns)
525 SelectInterestingSourceRegion(SourceLine, CaretLine, FixItInsertionLine,
526 CaretEndColNo, Columns);
528 // Finally, remove any blank spaces from the end of CaretLine.
529 while (CaretLine[CaretLine.size()-1] == ' ')
530 CaretLine.erase(CaretLine.end()-1);
532 // Emit what we have computed.
533 OS << SourceLine << '\n';
535 if (DiagOpts->ShowColors)
536 OS.changeColor(caretColor, true);
537 OS << CaretLine << '\n';
538 if (DiagOpts->ShowColors)
541 if (!FixItInsertionLine.empty()) {
542 if (DiagOpts->ShowColors)
543 // Print fixit line in color
544 OS.changeColor(fixitColor, false);
545 if (DiagOpts->ShowSourceRanges)
547 OS << FixItInsertionLine << '\n';
548 if (DiagOpts->ShowColors)
552 if (DiagOpts->ShowParseableFixits) {
554 // We follow FixItRewriter's example in not (yet) handling
555 // fix-its in macros.
556 bool BadApples = false;
557 for (const FixItHint *Hint = Hints; Hint != Hints + NumHints; ++Hint) {
558 if (Hint->RemoveRange.isInvalid() ||
559 Hint->RemoveRange.getBegin().isMacroID() ||
560 Hint->RemoveRange.getEnd().isMacroID()) {
567 for (const FixItHint *Hint = Hints; Hint != Hints + NumHints; ++Hint) {
569 SourceLocation B = Hint->RemoveRange.getBegin();
570 SourceLocation E = Hint->RemoveRange.getEnd();
572 std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(B);
573 std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(E);
575 // Adjust for token ranges.
576 if (Hint->RemoveRange.isTokenRange())
577 EInfo.second += Lexer::MeasureTokenLength(E, SM, *LangOpts);
579 // We specifically do not do word-wrapping or tab-expansion here,
580 // because this is supposed to be easy to parse.
581 PresumedLoc PLoc = SM.getPresumedLoc(B);
582 if (PLoc.isInvalid())
586 OS.write_escaped(SM.getPresumedLoc(B).getFilename());
587 OS << "\":{" << SM.getLineNumber(BInfo.first, BInfo.second)
588 << ':' << SM.getColumnNumber(BInfo.first, BInfo.second)
589 << '-' << SM.getLineNumber(EInfo.first, EInfo.second)
590 << ':' << SM.getColumnNumber(EInfo.first, EInfo.second)
592 OS.write_escaped(Hint->CodeToInsert);
599 /// \brief Skip over whitespace in the string, starting at the given
602 /// \returns The index of the first non-whitespace character that is
603 /// greater than or equal to Idx or, if no such character exists,
604 /// returns the end of the string.
605 static unsigned skipWhitespace(unsigned Idx,
606 const llvm::SmallVectorImpl<char> &Str,
608 while (Idx < Length && isspace(Str[Idx]))
613 /// \brief If the given character is the start of some kind of
614 /// balanced punctuation (e.g., quotes or parentheses), return the
615 /// character that will terminate the punctuation.
617 /// \returns The ending punctuation character, if any, or the NULL
618 /// character if the input character does not start any punctuation.
619 static inline char findMatchingPunctuation(char c) {
621 case '\'': return '\'';
622 case '`': return '\'';
623 case '"': return '"';
624 case '(': return ')';
625 case '[': return ']';
626 case '{': return '}';
633 /// \brief Find the end of the word starting at the given offset
636 /// \returns the index pointing one character past the end of the
638 static unsigned findEndOfWord(unsigned Start,
639 const llvm::SmallVectorImpl<char> &Str,
640 unsigned Length, unsigned Column,
642 assert(Start < Str.size() && "Invalid start position!");
643 unsigned End = Start + 1;
645 // If we are already at the end of the string, take that as the word.
646 if (End == Str.size())
649 // Determine if the start of the string is actually opening
650 // punctuation, e.g., a quote or parentheses.
651 char EndPunct = findMatchingPunctuation(Str[Start]);
653 // This is a normal word. Just find the first space character.
654 while (End < Length && !isspace(Str[End]))
659 // We have the start of a balanced punctuation sequence (quotes,
660 // parentheses, etc.). Determine the full sequence is.
661 llvm::SmallString<16> PunctuationEndStack;
662 PunctuationEndStack.push_back(EndPunct);
663 while (End < Length && !PunctuationEndStack.empty()) {
664 if (Str[End] == PunctuationEndStack.back())
665 PunctuationEndStack.pop_back();
666 else if (char SubEndPunct = findMatchingPunctuation(Str[End]))
667 PunctuationEndStack.push_back(SubEndPunct);
672 // Find the first space character after the punctuation ended.
673 while (End < Length && !isspace(Str[End]))
676 unsigned PunctWordLength = End - Start;
677 if (// If the word fits on this line
678 Column + PunctWordLength <= Columns ||
679 // ... or the word is "short enough" to take up the next line
680 // without too much ugly white space
681 PunctWordLength < Columns/3)
682 return End; // Take the whole thing as a single "word".
684 // The whole quoted/parenthesized string is too long to print as a
685 // single "word". Instead, find the "word" that starts just after
686 // the punctuation and use that end-point instead. This will recurse
687 // until it finds something small enough to consider a word.
688 return findEndOfWord(Start + 1, Str, Length, Column + 1, Columns);
691 /// \brief Print the given string to a stream, word-wrapping it to
692 /// some number of columns in the process.
694 /// \brief OS the stream to which the word-wrapping string will be
697 /// \brief Str the string to word-wrap and output.
699 /// \brief Columns the number of columns to word-wrap to.
701 /// \brief Column the column number at which the first character of \p
702 /// Str will be printed. This will be non-zero when part of the first
703 /// line has already been printed.
705 /// \brief Indentation the number of spaces to indent any lines beyond
708 /// \returns true if word-wrapping was required, or false if the
709 /// string fit on the first line.
710 static bool PrintWordWrapped(llvm::raw_ostream &OS,
711 const llvm::SmallVectorImpl<char> &Str,
714 unsigned Indentation = WordWrapIndentation) {
715 unsigned Length = Str.size();
717 // If there is a newline in this message somewhere, find that
718 // newline and split the message into the part before the newline
719 // (which will be word-wrapped) and the part from the newline one
720 // (which will be emitted unchanged).
721 for (unsigned I = 0; I != Length; ++I)
722 if (Str[I] == '\n') {
727 // The string used to indent each line.
728 llvm::SmallString<16> IndentStr;
729 IndentStr.assign(Indentation, ' ');
730 bool Wrapped = false;
731 for (unsigned WordStart = 0, WordEnd; WordStart < Length;
732 WordStart = WordEnd) {
733 // Find the beginning of the next word.
734 WordStart = skipWhitespace(WordStart, Str, Length);
735 if (WordStart == Length)
738 // Find the end of this word.
739 WordEnd = findEndOfWord(WordStart, Str, Length, Column, Columns);
741 // Does this word fit on the current line?
742 unsigned WordLength = WordEnd - WordStart;
743 if (Column + WordLength < Columns) {
744 // This word fits on the current line; print it there.
749 OS.write(&Str[WordStart], WordLength);
750 Column += WordLength;
754 // This word does not fit on the current line, so wrap to the next
757 OS.write(&IndentStr[0], Indentation);
758 OS.write(&Str[WordStart], WordLength);
759 Column = Indentation + WordLength;
763 if (Length == Str.size())
764 return Wrapped; // We're done.
766 // There is a newline in the message, followed by something that
767 // will not be word-wrapped. Print that.
768 OS.write(&Str[Length], Str.size() - Length);
772 void TextDiagnosticPrinter::HandleDiagnostic(Diagnostic::Level Level,
773 const DiagnosticInfo &Info) {
774 // Default implementation (Warnings/errors count).
775 DiagnosticClient::HandleDiagnostic(Level, Info);
777 // Keeps track of the the starting position of the location
778 // information (e.g., "foo.c:10:4:") that precedes the error
779 // message. We use this information to determine how long the
780 // file+line+column number prefix is.
781 uint64_t StartOfLocationInfo = OS.tell();
784 OS << Prefix << ": ";
786 // If the location is specified, print out a file/line/col and include trace
788 if (Info.getLocation().isValid()) {
789 const SourceManager &SM = Info.getSourceManager();
790 PresumedLoc PLoc = SM.getPresumedLoc(Info.getLocation());
791 if (PLoc.isInvalid()) {
792 // At least print the file name if available:
793 FileID FID = SM.getFileID(Info.getLocation());
794 if (!FID.isInvalid()) {
795 const FileEntry* FE = SM.getFileEntryForID(FID);
796 if (FE && FE->getName()) {
798 if (FE->getDevice() == 0 && FE->getInode() == 0
799 && FE->getFileMode() == 0) {
800 // in PCH is a guess, but a good one:
807 unsigned LineNo = PLoc.getLine();
809 // First, if this diagnostic is not in the main file, print out the
810 // "included from" lines.
811 if (LastWarningLoc != PLoc.getIncludeLoc()) {
812 LastWarningLoc = PLoc.getIncludeLoc();
813 PrintIncludeStack(Level, LastWarningLoc, SM);
814 StartOfLocationInfo = OS.tell();
817 // Compute the column number.
818 if (DiagOpts->ShowLocation) {
819 if (DiagOpts->ShowColors)
820 OS.changeColor(savedColor, true);
822 OS << PLoc.getFilename();
823 switch (DiagOpts->Format) {
824 case DiagnosticOptions::Clang: OS << ':' << LineNo; break;
825 case DiagnosticOptions::Msvc: OS << '(' << LineNo; break;
826 case DiagnosticOptions::Vi: OS << " +" << LineNo; break;
828 if (DiagOpts->ShowColumn)
829 if (unsigned ColNo = PLoc.getColumn()) {
830 if (DiagOpts->Format == DiagnosticOptions::Msvc) {
837 switch (DiagOpts->Format) {
838 case DiagnosticOptions::Clang:
839 case DiagnosticOptions::Vi: OS << ':'; break;
840 case DiagnosticOptions::Msvc: OS << ") : "; break;
844 if (DiagOpts->ShowSourceRanges && Info.getNumRanges()) {
846 SM.getFileID(SM.getInstantiationLoc(Info.getLocation()));
847 bool PrintedRange = false;
849 for (unsigned i = 0, e = Info.getNumRanges(); i != e; ++i) {
850 // Ignore invalid ranges.
851 if (!Info.getRange(i).isValid()) continue;
853 SourceLocation B = Info.getRange(i).getBegin();
854 SourceLocation E = Info.getRange(i).getEnd();
855 B = SM.getInstantiationLoc(B);
856 E = SM.getInstantiationLoc(E);
858 // If the End location and the start location are the same and are a
859 // macro location, then the range was something that came from a
860 // macro expansion or _Pragma. If this is an object-like macro, the
861 // best we can do is to highlight the range. If this is a
862 // function-like macro, we'd also like to highlight the arguments.
863 if (B == E && Info.getRange(i).getEnd().isMacroID())
864 E = SM.getInstantiationRange(Info.getRange(i).getEnd()).second;
866 std::pair<FileID, unsigned> BInfo = SM.getDecomposedLoc(B);
867 std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(E);
869 // If the start or end of the range is in another file, just discard
871 if (BInfo.first != CaretFileID || EInfo.first != CaretFileID)
874 // Add in the length of the token, so that we cover multi-char
876 unsigned TokSize = 0;
877 if (Info.getRange(i).isTokenRange())
878 TokSize = Lexer::MeasureTokenLength(E, SM, *LangOpts);
880 OS << '{' << SM.getLineNumber(BInfo.first, BInfo.second) << ':'
881 << SM.getColumnNumber(BInfo.first, BInfo.second) << '-'
882 << SM.getLineNumber(EInfo.first, EInfo.second) << ':'
883 << (SM.getColumnNumber(EInfo.first, EInfo.second)+TokSize)
893 if (DiagOpts->ShowColors)
898 if (DiagOpts->ShowColors) {
899 // Print diagnostic category in bold and color
901 case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type");
902 case Diagnostic::Note: OS.changeColor(noteColor, true); break;
903 case Diagnostic::Warning: OS.changeColor(warningColor, true); break;
904 case Diagnostic::Error: OS.changeColor(errorColor, true); break;
905 case Diagnostic::Fatal: OS.changeColor(fatalColor, true); break;
910 case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type");
911 case Diagnostic::Note: OS << "note: "; break;
912 case Diagnostic::Warning: OS << "warning: "; break;
913 case Diagnostic::Error: OS << "error: "; break;
914 case Diagnostic::Fatal: OS << "fatal error: "; break;
917 if (DiagOpts->ShowColors)
920 llvm::SmallString<100> OutStr;
921 Info.FormatDiagnostic(OutStr);
923 if (DiagOpts->ShowNames &&
924 !DiagnosticIDs::isBuiltinNote(Info.getID())) {
926 OutStr += DiagnosticIDs::getName(Info.getID());
930 std::string OptionName;
931 if (DiagOpts->ShowOptionNames) {
932 // Was this a warning mapped to an error using -Werror or pragma?
933 if (Level == Diagnostic::Error &&
934 DiagnosticIDs::isBuiltinWarningOrExtension(Info.getID())) {
935 diag::Mapping mapping = diag::MAP_IGNORE;
936 Info.getDiags()->getDiagnosticLevel(Info.getID(), Info.getLocation(),
938 if (mapping == diag::MAP_WARNING)
939 OptionName += "-Werror";
942 llvm::StringRef Opt = DiagnosticIDs::getWarningOptionForDiag(Info.getID());
944 if (!OptionName.empty())
948 } else if (Info.getID() == diag::fatal_too_many_errors) {
949 OptionName = "-ferror-limit=";
951 // If the diagnostic is an extension diagnostic and not enabled by default
952 // then it must have been turned on with -pedantic.
953 bool EnabledByDefault;
954 if (DiagnosticIDs::isBuiltinExtensionDiag(Info.getID(),
957 OptionName = "-pedantic";
961 // If the user wants to see category information, include it too.
962 unsigned DiagCategory = 0;
963 if (DiagOpts->ShowCategories)
964 DiagCategory = DiagnosticIDs::getCategoryNumberForDiag(Info.getID());
966 // If there is any categorization information, include it.
967 if (!OptionName.empty() || DiagCategory != 0) {
968 bool NeedsComma = false;
971 if (!OptionName.empty()) {
972 OutStr += OptionName;
977 if (NeedsComma) OutStr += ',';
978 if (DiagOpts->ShowCategories == 1)
979 OutStr += llvm::utostr(DiagCategory);
981 assert(DiagOpts->ShowCategories == 2 && "Invalid ShowCategories value");
982 OutStr += DiagnosticIDs::getCategoryNameFromID(DiagCategory);
990 if (DiagOpts->ShowColors) {
991 // Print warnings, errors and fatal errors in bold, no color
993 case Diagnostic::Warning: OS.changeColor(savedColor, true); break;
994 case Diagnostic::Error: OS.changeColor(savedColor, true); break;
995 case Diagnostic::Fatal: OS.changeColor(savedColor, true); break;
996 default: break; //don't bold notes
1000 if (DiagOpts->MessageLength) {
1001 // We will be word-wrapping the error message, so compute the
1002 // column number where we currently are (after printing the
1003 // location information).
1004 unsigned Column = OS.tell() - StartOfLocationInfo;
1005 PrintWordWrapped(OS, OutStr, DiagOpts->MessageLength, Column);
1007 OS.write(OutStr.begin(), OutStr.size());
1010 if (DiagOpts->ShowColors)
1013 // If caret diagnostics are enabled and we have location, we want to
1014 // emit the caret. However, we only do this if the location moved
1015 // from the last diagnostic, if the last diagnostic was a note that
1016 // was part of a different warning or error diagnostic, or if the
1017 // diagnostic has ranges. We don't want to emit the same caret
1018 // multiple times if one loc has multiple diagnostics.
1019 if (DiagOpts->ShowCarets && Info.getLocation().isValid() &&
1020 ((LastLoc != Info.getLocation()) || Info.getNumRanges() ||
1021 (LastCaretDiagnosticWasNote && Level != Diagnostic::Note) ||
1022 Info.getNumFixItHints())) {
1023 // Cache the LastLoc, it allows us to omit duplicate source/caret spewage.
1024 LastLoc = FullSourceLoc(Info.getLocation(), Info.getSourceManager());
1025 LastCaretDiagnosticWasNote = (Level == Diagnostic::Note);
1027 // Get the ranges into a local array we can hack on.
1028 CharSourceRange Ranges[20];
1029 unsigned NumRanges = Info.getNumRanges();
1030 assert(NumRanges < 20 && "Out of space");
1031 for (unsigned i = 0; i != NumRanges; ++i)
1032 Ranges[i] = Info.getRange(i);
1034 unsigned NumHints = Info.getNumFixItHints();
1035 for (unsigned i = 0; i != NumHints; ++i) {
1036 const FixItHint &Hint = Info.getFixItHint(i);
1037 if (Hint.RemoveRange.isValid()) {
1038 assert(NumRanges < 20 && "Out of space");
1039 Ranges[NumRanges++] = Hint.RemoveRange;
1043 unsigned MacroInstSkipStart = 0, MacroInstSkipEnd = 0;
1044 if (DiagOpts && DiagOpts->MacroBacktraceLimit && !LastLoc.isFileID()) {
1045 // Compute the length of the macro-instantiation backtrace, so that we
1046 // can establish which steps in the macro backtrace we'll skip.
1047 SourceLocation Loc = LastLoc;
1051 Loc = LastLoc.getManager().getImmediateInstantiationRange(Loc).first;
1052 } while (!Loc.isFileID());
1054 if (Depth > DiagOpts->MacroBacktraceLimit) {
1055 MacroInstSkipStart = DiagOpts->MacroBacktraceLimit / 2 +
1056 DiagOpts->MacroBacktraceLimit % 2;
1057 MacroInstSkipEnd = Depth - DiagOpts->MacroBacktraceLimit / 2;
1061 EmitCaretDiagnostic(Level, LastLoc, Ranges, NumRanges, LastLoc.getManager(),
1062 Info.getFixItHints(),
1063 Info.getNumFixItHints(),
1064 DiagOpts->MessageLength,
1065 0, MacroInstSkipStart, MacroInstSkipEnd);