YAMLTraits.cpp revision 2b8d813851c19596c6591c54721082217f0ab5ef 
1//===- lib/Support/YAMLTraits.cpp -----------------------------------------===//
2//
3//                             The LLVM Linker
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/Support/YAMLTraits.h"
11#include "llvm/ADT/Twine.h"
12#include "llvm/Support/Casting.h"
13#include "llvm/Support/ErrorHandling.h"
14#include "llvm/Support/Format.h"
15#include "llvm/Support/YAMLParser.h"
16#include "llvm/Support/raw_ostream.h"
17#include <cstring>
18#include <cctype>
19using namespace llvm;
20using namespace yaml;
21
22//===----------------------------------------------------------------------===//
23//  IO
24//===----------------------------------------------------------------------===//
25
26IO::IO(void *Context) : Ctxt(Context) {
27}
28
29IO::~IO() {
30}
31
32void *IO::getContext() {
33  return Ctxt;
34}
35
36void IO::setContext(void *Context) {
37  Ctxt = Context;
38}
39
40//===----------------------------------------------------------------------===//
41//  Input
42//===----------------------------------------------------------------------===//
43
44Input::Input(StringRef InputContent, void *Ctxt)
45  : IO(Ctxt),
46    Strm(new Stream(InputContent, SrcMgr)),
47    CurrentNode(NULL) {
48  DocIterator = Strm->begin();
49}
50
51Input::~Input() {
52}
53
54error_code Input::error() {
55  return EC;
56}
57
58void Input::setDiagHandler(SourceMgr::DiagHandlerTy Handler, void *Ctxt) {
59  SrcMgr.setDiagHandler(Handler, Ctxt);
60}
61
62bool Input::outputting() const {
63  return false;
64}
65
66bool Input::setCurrentDocument() {
67  if (DocIterator != Strm->end()) {
68    Node *N = DocIterator->getRoot();
69    if (isa<NullNode>(N)) {
70      // Empty files are allowed and ignored
71      ++DocIterator;
72      return setCurrentDocument();
73    }
74    TopNode.reset(this->createHNodes(N));
75    CurrentNode = TopNode.get();
76    return true;
77  }
78  return false;
79}
80
81void Input::nextDocument() {
82  ++DocIterator;
83}
84
85bool Input::mapTag(StringRef Tag, bool Default) {
86  std::string foundTag = CurrentNode->_node->getVerbatimTag();
87  if (foundTag.empty()) {
88    // If no tag found and 'Tag' is the default, say it was found.
89    return Default;
90  }
91  // Return true iff found tag matches supplied tag.
92  return Tag.equals(foundTag);
93}
94
95void Input::beginMapping() {
96  if (EC)
97    return;
98  MapHNode *MN = dyn_cast<MapHNode>(CurrentNode);
99  if (MN) {
100    MN->ValidKeys.clear();
101  }
102}
103
104bool Input::preflightKey(const char *Key, bool Required, bool, bool &UseDefault,
105                         void *&SaveInfo) {
106  UseDefault = false;
107  if (EC)
108    return false;
109  MapHNode *MN = dyn_cast<MapHNode>(CurrentNode);
110  if (!MN) {
111    setError(CurrentNode, "not a mapping");
112    return false;
113  }
114  MN->ValidKeys.push_back(Key);
115  HNode *Value = MN->Mapping[Key];
116  if (!Value) {
117    if (Required)
118      setError(CurrentNode, Twine("missing required key '") + Key + "'");
119    else
120      UseDefault = true;
121    return false;
122  }
123  SaveInfo = CurrentNode;
124  CurrentNode = Value;
125  return true;
126}
127
128void Input::postflightKey(void *saveInfo) {
129  CurrentNode = reinterpret_cast<HNode *>(saveInfo);
130}
131
132void Input::endMapping() {
133  if (EC)
134    return;
135  MapHNode *MN = dyn_cast<MapHNode>(CurrentNode);
136  if (!MN)
137    return;
138  for (MapHNode::NameToNode::iterator i = MN->Mapping.begin(),
139       End = MN->Mapping.end(); i != End; ++i) {
140    if (!MN->isValidKey(i->first())) {
141      setError(i->second, Twine("unknown key '") + i->first() + "'");
142      break;
143    }
144  }
145}
146
147unsigned Input::beginSequence() {
148  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
149    return SQ->Entries.size();
150  }
151  return 0;
152}
153
154void Input::endSequence() {
155}
156
157bool Input::preflightElement(unsigned Index, void *&SaveInfo) {
158  if (EC)
159    return false;
160  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
161    SaveInfo = CurrentNode;
162    CurrentNode = SQ->Entries[Index];
163    return true;
164  }
165  return false;
166}
167
168void Input::postflightElement(void *SaveInfo) {
169  CurrentNode = reinterpret_cast<HNode *>(SaveInfo);
170}
171
172unsigned Input::beginFlowSequence() {
173  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
174    return SQ->Entries.size();
175  }
176  return 0;
177}
178
179bool Input::preflightFlowElement(unsigned index, void *&SaveInfo) {
180  if (EC)
181    return false;
182  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
183    SaveInfo = CurrentNode;
184    CurrentNode = SQ->Entries[index];
185    return true;
186  }
187  return false;
188}
189
190void Input::postflightFlowElement(void *SaveInfo) {
191  CurrentNode = reinterpret_cast<HNode *>(SaveInfo);
192}
193
194void Input::endFlowSequence() {
195}
196
197void Input::beginEnumScalar() {
198  ScalarMatchFound = false;
199}
200
201bool Input::matchEnumScalar(const char *Str, bool) {
202  if (ScalarMatchFound)
203    return false;
204  if (ScalarHNode *SN = dyn_cast<ScalarHNode>(CurrentNode)) {
205    if (SN->value().equals(Str)) {
206      ScalarMatchFound = true;
207      return true;
208    }
209  }
210  return false;
211}
212
213void Input::endEnumScalar() {
214  if (!ScalarMatchFound) {
215    setError(CurrentNode, "unknown enumerated scalar");
216  }
217}
218
219bool Input::beginBitSetScalar(bool &DoClear) {
220  BitValuesUsed.clear();
221  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
222    BitValuesUsed.insert(BitValuesUsed.begin(), SQ->Entries.size(), false);
223  } else {
224    setError(CurrentNode, "expected sequence of bit values");
225  }
226  DoClear = true;
227  return true;
228}
229
230bool Input::bitSetMatch(const char *Str, bool) {
231  if (EC)
232    return false;
233  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
234    unsigned Index = 0;
235    for (std::vector<HNode *>::iterator i = SQ->Entries.begin(),
236         End = SQ->Entries.end(); i != End; ++i) {
237      if (ScalarHNode *SN = dyn_cast<ScalarHNode>(*i)) {
238        if (SN->value().equals(Str)) {
239          BitValuesUsed[Index] = true;
240          return true;
241        }
242      } else {
243        setError(CurrentNode, "unexpected scalar in sequence of bit values");
244      }
245      ++Index;
246    }
247  } else {
248    setError(CurrentNode, "expected sequence of bit values");
249  }
250  return false;
251}
252
253void Input::endBitSetScalar() {
254  if (EC)
255    return;
256  if (SequenceHNode *SQ = dyn_cast<SequenceHNode>(CurrentNode)) {
257    assert(BitValuesUsed.size() == SQ->Entries.size());
258    for (unsigned i = 0; i < SQ->Entries.size(); ++i) {
259      if (!BitValuesUsed[i]) {
260        setError(SQ->Entries[i], "unknown bit value");
261        return;
262      }
263    }
264  }
265}
266
267void Input::scalarString(StringRef &S) {
268  if (ScalarHNode *SN = dyn_cast<ScalarHNode>(CurrentNode)) {
269    S = SN->value();
270  } else {
271    setError(CurrentNode, "unexpected scalar");
272  }
273}
274
275void Input::setError(HNode *hnode, const Twine &message) {
276  this->setError(hnode->_node, message);
277}
278
279void Input::setError(Node *node, const Twine &message) {
280  Strm->printError(node, message);
281  EC = make_error_code(errc::invalid_argument);
282}
283
284Input::HNode *Input::createHNodes(Node *N) {
285  SmallString<128> StringStorage;
286  if (ScalarNode *SN = dyn_cast<ScalarNode>(N)) {
287    StringRef KeyStr = SN->getValue(StringStorage);
288    if (!StringStorage.empty()) {
289      // Copy string to permanent storage
290      unsigned Len = StringStorage.size();
291      char *Buf = StringAllocator.Allocate<char>(Len);
292      memcpy(Buf, &StringStorage[0], Len);
293      KeyStr = StringRef(Buf, Len);
294    }
295    return new ScalarHNode(N, KeyStr);
296  } else if (SequenceNode *SQ = dyn_cast<SequenceNode>(N)) {
297    SequenceHNode *SQHNode = new SequenceHNode(N);
298    for (SequenceNode::iterator i = SQ->begin(), End = SQ->end(); i != End;
299         ++i) {
300      HNode *Entry = this->createHNodes(i);
301      if (EC)
302        break;
303      SQHNode->Entries.push_back(Entry);
304    }
305    return SQHNode;
306  } else if (MappingNode *Map = dyn_cast<MappingNode>(N)) {
307    MapHNode *mapHNode = new MapHNode(N);
308    for (MappingNode::iterator i = Map->begin(), End = Map->end(); i != End;
309         ++i) {
310      ScalarNode *KeyScalar = dyn_cast<ScalarNode>(i->getKey());
311      StringStorage.clear();
312      StringRef KeyStr = KeyScalar->getValue(StringStorage);
313      if (!StringStorage.empty()) {
314        // Copy string to permanent storage
315        unsigned Len = StringStorage.size();
316        char *Buf = StringAllocator.Allocate<char>(Len);
317        memcpy(Buf, &StringStorage[0], Len);
318        KeyStr = StringRef(Buf, Len);
319      }
320      HNode *ValueHNode = this->createHNodes(i->getValue());
321      if (EC)
322        break;
323      mapHNode->Mapping[KeyStr] = ValueHNode;
324    }
325    return mapHNode;
326  } else if (isa<NullNode>(N)) {
327    return new EmptyHNode(N);
328  } else {
329    setError(N, "unknown node kind");
330    return NULL;
331  }
332}
333
334bool Input::MapHNode::isValidKey(StringRef Key) {
335  for (SmallVectorImpl<const char *>::iterator i = ValidKeys.begin(),
336       End = ValidKeys.end(); i != End; ++i) {
337    if (Key.equals(*i))
338      return true;
339  }
340  return false;
341}
342
343void Input::setError(const Twine &Message) {
344  this->setError(CurrentNode, Message);
345}
346
347bool Input::canElideEmptySequence() {
348  return false;
349}
350
351Input::MapHNode::~MapHNode() {
352  for (MapHNode::NameToNode::iterator i = Mapping.begin(), End = Mapping.end();
353                                                                i != End; ++i) {
354    delete i->second;
355  }
356}
357
358Input::SequenceHNode::~SequenceHNode() {
359  for (std::vector<HNode*>::iterator i = Entries.begin(), End = Entries.end();
360                                                                i != End; ++i) {
361    delete *i;
362  }
363}
364
365
366
367//===----------------------------------------------------------------------===//
368//  Output
369//===----------------------------------------------------------------------===//
370
371Output::Output(raw_ostream &yout, void *context)
372    : IO(context),
373      Out(yout),
374      Column(0),
375      ColumnAtFlowStart(0),
376      NeedBitValueComma(false),
377      NeedFlowSequenceComma(false),
378      EnumerationMatchFound(false),
379      NeedsNewLine(false) {
380}
381
382Output::~Output() {
383}
384
385bool Output::outputting() const {
386  return true;
387}
388
389void Output::beginMapping() {
390  StateStack.push_back(inMapFirstKey);
391  NeedsNewLine = true;
392}
393
394bool Output::mapTag(StringRef Tag, bool Use) {
395  if (Use) {
396    this->output(" ");
397    this->output(Tag);
398  }
399  return Use;
400}
401
402void Output::endMapping() {
403  StateStack.pop_back();
404}
405
406bool Output::preflightKey(const char *Key, bool Required, bool SameAsDefault,
407                          bool &UseDefault, void *&) {
408  UseDefault = false;
409  if (Required || !SameAsDefault) {
410    this->newLineCheck();
411    this->paddedKey(Key);
412    return true;
413  }
414  return false;
415}
416
417void Output::postflightKey(void *) {
418  if (StateStack.back() == inMapFirstKey) {
419    StateStack.pop_back();
420    StateStack.push_back(inMapOtherKey);
421  }
422}
423
424void Output::beginDocuments() {
425  this->outputUpToEndOfLine("---");
426}
427
428bool Output::preflightDocument(unsigned index) {
429  if (index > 0)
430    this->outputUpToEndOfLine("\n---");
431  return true;
432}
433
434void Output::postflightDocument() {
435}
436
437void Output::endDocuments() {
438  output("\n...\n");
439}
440
441unsigned Output::beginSequence() {
442  StateStack.push_back(inSeq);
443  NeedsNewLine = true;
444  return 0;
445}
446
447void Output::endSequence() {
448  StateStack.pop_back();
449}
450
451bool Output::preflightElement(unsigned, void *&) {
452  return true;
453}
454
455void Output::postflightElement(void *) {
456}
457
458unsigned Output::beginFlowSequence() {
459  StateStack.push_back(inFlowSeq);
460  this->newLineCheck();
461  ColumnAtFlowStart = Column;
462  output("[ ");
463  NeedFlowSequenceComma = false;
464  return 0;
465}
466
467void Output::endFlowSequence() {
468  StateStack.pop_back();
469  this->outputUpToEndOfLine(" ]");
470}
471
472bool Output::preflightFlowElement(unsigned, void *&) {
473  if (NeedFlowSequenceComma)
474    output(", ");
475  if (Column > 70) {
476    output("\n");
477    for (int i = 0; i < ColumnAtFlowStart; ++i)
478      output(" ");
479    Column = ColumnAtFlowStart;
480    output("  ");
481  }
482  return true;
483}
484
485void Output::postflightFlowElement(void *) {
486  NeedFlowSequenceComma = true;
487}
488
489void Output::beginEnumScalar() {
490  EnumerationMatchFound = false;
491}
492
493bool Output::matchEnumScalar(const char *Str, bool Match) {
494  if (Match && !EnumerationMatchFound) {
495    this->newLineCheck();
496    this->outputUpToEndOfLine(Str);
497    EnumerationMatchFound = true;
498  }
499  return false;
500}
501
502void Output::endEnumScalar() {
503  if (!EnumerationMatchFound)
504    llvm_unreachable("bad runtime enum value");
505}
506
507bool Output::beginBitSetScalar(bool &DoClear) {
508  this->newLineCheck();
509  output("[ ");
510  NeedBitValueComma = false;
511  DoClear = false;
512  return true;
513}
514
515bool Output::bitSetMatch(const char *Str, bool Matches) {
516  if (Matches) {
517    if (NeedBitValueComma)
518      output(", ");
519    this->output(Str);
520    NeedBitValueComma = true;
521  }
522  return false;
523}
524
525void Output::endBitSetScalar() {
526  this->outputUpToEndOfLine(" ]");
527}
528
529void Output::scalarString(StringRef &S) {
530  const char ScalarSafeChars[] = "abcdefghijklmnopqrstuvwxyz"
531      "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_-/^., \t";
532
533  this->newLineCheck();
534  if (S.empty()) {
535    // Print '' for the empty string because leaving the field empty is not
536    // allowed.
537    this->outputUpToEndOfLine("''");
538    return;
539  }
540  if (S.find_first_not_of(ScalarSafeChars) == StringRef::npos &&
541      !isspace(S.front()) && !isspace(S.back())) {
542    // If the string consists only of safe characters, print it out without
543    // quotes.
544    this->outputUpToEndOfLine(S);
545    return;
546  }
547  unsigned i = 0;
548  unsigned j = 0;
549  unsigned End = S.size();
550  output("'"); // Starting single quote.
551  const char *Base = S.data();
552  while (j < End) {
553    // Escape a single quote by doubling it.
554    if (S[j] == '\'') {
555      output(StringRef(&Base[i], j - i + 1));
556      output("'");
557      i = j + 1;
558    }
559    ++j;
560  }
561  output(StringRef(&Base[i], j - i));
562  this->outputUpToEndOfLine("'"); // Ending single quote.
563}
564
565void Output::setError(const Twine &message) {
566}
567
568bool Output::canElideEmptySequence() {
569  // Normally, with an optional key/value where the value is an empty sequence,
570  // the whole key/value can be not written.  But, that produces wrong yaml
571  // if the key/value is the only thing in the map and the map is used in
572  // a sequence.  This detects if the this sequence is the first key/value
573  // in map that itself is embedded in a sequnce.
574  if (StateStack.size() < 2)
575    return true;
576  if (StateStack.back() != inMapFirstKey)
577    return true;
578  return (StateStack[StateStack.size()-2] != inSeq);
579}
580
581void Output::output(StringRef s) {
582  Column += s.size();
583  Out << s;
584}
585
586void Output::outputUpToEndOfLine(StringRef s) {
587  this->output(s);
588  if (StateStack.empty() || StateStack.back() != inFlowSeq)
589    NeedsNewLine = true;
590}
591
592void Output::outputNewLine() {
593  Out << "\n";
594  Column = 0;
595}
596
597// if seq at top, indent as if map, then add "- "
598// if seq in middle, use "- " if firstKey, else use "  "
599//
600
601void Output::newLineCheck() {
602  if (!NeedsNewLine)
603    return;
604  NeedsNewLine = false;
605
606  this->outputNewLine();
607
608  assert(StateStack.size() > 0);
609  unsigned Indent = StateStack.size() - 1;
610  bool OutputDash = false;
611
612  if (StateStack.back() == inSeq) {
613    OutputDash = true;
614  } else if ((StateStack.size() > 1) && (StateStack.back() == inMapFirstKey) &&
615             (StateStack[StateStack.size() - 2] == inSeq)) {
616    --Indent;
617    OutputDash = true;
618  }
619
620  for (unsigned i = 0; i < Indent; ++i) {
621    output("  ");
622  }
623  if (OutputDash) {
624    output("- ");
625  }
626
627}
628
629void Output::paddedKey(StringRef key) {
630  output(key);
631  output(":");
632  const char *spaces = "                ";
633  if (key.size() < strlen(spaces))
634    output(&spaces[key.size()]);
635  else
636    output(" ");
637}
638
639//===----------------------------------------------------------------------===//
640//  traits for built-in types
641//===----------------------------------------------------------------------===//
642
643void ScalarTraits<bool>::output(const bool &Val, void *, raw_ostream &Out) {
644  Out << (Val ? "true" : "false");
645}
646
647StringRef ScalarTraits<bool>::input(StringRef Scalar, void *, bool &Val) {
648  if (Scalar.equals("true")) {
649    Val = true;
650    return StringRef();
651  } else if (Scalar.equals("false")) {
652    Val = false;
653    return StringRef();
654  }
655  return "invalid boolean";
656}
657
658void ScalarTraits<StringRef>::output(const StringRef &Val, void *,
659                                     raw_ostream &Out) {
660  Out << Val;
661}
662
663StringRef ScalarTraits<StringRef>::input(StringRef Scalar, void *,
664                                         StringRef &Val) {
665  Val = Scalar;
666  return StringRef();
667}
668
669void ScalarTraits<uint8_t>::output(const uint8_t &Val, void *,
670                                   raw_ostream &Out) {
671  // use temp uin32_t because ostream thinks uint8_t is a character
672  uint32_t Num = Val;
673  Out << Num;
674}
675
676StringRef ScalarTraits<uint8_t>::input(StringRef Scalar, void *, uint8_t &Val) {
677  unsigned long long n;
678  if (getAsUnsignedInteger(Scalar, 0, n))
679    return "invalid number";
680  if (n > 0xFF)
681    return "out of range number";
682  Val = n;
683  return StringRef();
684}
685
686void ScalarTraits<uint16_t>::output(const uint16_t &Val, void *,
687                                    raw_ostream &Out) {
688  Out << Val;
689}
690
691StringRef ScalarTraits<uint16_t>::input(StringRef Scalar, void *,
692                                        uint16_t &Val) {
693  unsigned long long n;
694  if (getAsUnsignedInteger(Scalar, 0, n))
695    return "invalid number";
696  if (n > 0xFFFF)
697    return "out of range number";
698  Val = n;
699  return StringRef();
700}
701
702void ScalarTraits<uint32_t>::output(const uint32_t &Val, void *,
703                                    raw_ostream &Out) {
704  Out << Val;
705}
706
707StringRef ScalarTraits<uint32_t>::input(StringRef Scalar, void *,
708                                        uint32_t &Val) {
709  unsigned long long n;
710  if (getAsUnsignedInteger(Scalar, 0, n))
711    return "invalid number";
712  if (n > 0xFFFFFFFFUL)
713    return "out of range number";
714  Val = n;
715  return StringRef();
716}
717
718void ScalarTraits<uint64_t>::output(const uint64_t &Val, void *,
719                                    raw_ostream &Out) {
720  Out << Val;
721}
722
723StringRef ScalarTraits<uint64_t>::input(StringRef Scalar, void *,
724                                        uint64_t &Val) {
725  unsigned long long N;
726  if (getAsUnsignedInteger(Scalar, 0, N))
727    return "invalid number";
728  Val = N;
729  return StringRef();
730}
731
732void ScalarTraits<int8_t>::output(const int8_t &Val, void *, raw_ostream &Out) {
733  // use temp in32_t because ostream thinks int8_t is a character
734  int32_t Num = Val;
735  Out << Num;
736}
737
738StringRef ScalarTraits<int8_t>::input(StringRef Scalar, void *, int8_t &Val) {
739  long long N;
740  if (getAsSignedInteger(Scalar, 0, N))
741    return "invalid number";
742  if ((N > 127) || (N < -128))
743    return "out of range number";
744  Val = N;
745  return StringRef();
746}
747
748void ScalarTraits<int16_t>::output(const int16_t &Val, void *,
749                                   raw_ostream &Out) {
750  Out << Val;
751}
752
753StringRef ScalarTraits<int16_t>::input(StringRef Scalar, void *, int16_t &Val) {
754  long long N;
755  if (getAsSignedInteger(Scalar, 0, N))
756    return "invalid number";
757  if ((N > INT16_MAX) || (N < INT16_MIN))
758    return "out of range number";
759  Val = N;
760  return StringRef();
761}
762
763void ScalarTraits<int32_t>::output(const int32_t &Val, void *,
764                                   raw_ostream &Out) {
765  Out << Val;
766}
767
768StringRef ScalarTraits<int32_t>::input(StringRef Scalar, void *, int32_t &Val) {
769  long long N;
770  if (getAsSignedInteger(Scalar, 0, N))
771    return "invalid number";
772  if ((N > INT32_MAX) || (N < INT32_MIN))
773    return "out of range number";
774  Val = N;
775  return StringRef();
776}
777
778void ScalarTraits<int64_t>::output(const int64_t &Val, void *,
779                                   raw_ostream &Out) {
780  Out << Val;
781}
782
783StringRef ScalarTraits<int64_t>::input(StringRef Scalar, void *, int64_t &Val) {
784  long long N;
785  if (getAsSignedInteger(Scalar, 0, N))
786    return "invalid number";
787  Val = N;
788  return StringRef();
789}
790
791void ScalarTraits<double>::output(const double &Val, void *, raw_ostream &Out) {
792  Out << format("%g", Val);
793}
794
795StringRef ScalarTraits<double>::input(StringRef Scalar, void *, double &Val) {
796  SmallString<32> buff(Scalar.begin(), Scalar.end());
797  char *end;
798  Val = strtod(buff.c_str(), &end);
799  if (*end != '\0')
800    return "invalid floating point number";
801  return StringRef();
802}
803
804void ScalarTraits<float>::output(const float &Val, void *, raw_ostream &Out) {
805  Out << format("%g", Val);
806}
807
808StringRef ScalarTraits<float>::input(StringRef Scalar, void *, float &Val) {
809  SmallString<32> buff(Scalar.begin(), Scalar.end());
810  char *end;
811  Val = strtod(buff.c_str(), &end);
812  if (*end != '\0')
813    return "invalid floating point number";
814  return StringRef();
815}
816
817void ScalarTraits<Hex8>::output(const Hex8 &Val, void *, raw_ostream &Out) {
818  uint8_t Num = Val;
819  Out << format("0x%02X", Num);
820}
821
822StringRef ScalarTraits<Hex8>::input(StringRef Scalar, void *, Hex8 &Val) {
823  unsigned long long n;
824  if (getAsUnsignedInteger(Scalar, 0, n))
825    return "invalid hex8 number";
826  if (n > 0xFF)
827    return "out of range hex8 number";
828  Val = n;
829  return StringRef();
830}
831
832void ScalarTraits<Hex16>::output(const Hex16 &Val, void *, raw_ostream &Out) {
833  uint16_t Num = Val;
834  Out << format("0x%04X", Num);
835}
836
837StringRef ScalarTraits<Hex16>::input(StringRef Scalar, void *, Hex16 &Val) {
838  unsigned long long n;
839  if (getAsUnsignedInteger(Scalar, 0, n))
840    return "invalid hex16 number";
841  if (n > 0xFFFF)
842    return "out of range hex16 number";
843  Val = n;
844  return StringRef();
845}
846
847void ScalarTraits<Hex32>::output(const Hex32 &Val, void *, raw_ostream &Out) {
848  uint32_t Num = Val;
849  Out << format("0x%08X", Num);
850}
851
852StringRef ScalarTraits<Hex32>::input(StringRef Scalar, void *, Hex32 &Val) {
853  unsigned long long n;
854  if (getAsUnsignedInteger(Scalar, 0, n))
855    return "invalid hex32 number";
856  if (n > 0xFFFFFFFFUL)
857    return "out of range hex32 number";
858  Val = n;
859  return StringRef();
860}
861
862void ScalarTraits<Hex64>::output(const Hex64 &Val, void *, raw_ostream &Out) {
863  uint64_t Num = Val;
864  Out << format("0x%016llX", Num);
865}
866
867StringRef ScalarTraits<Hex64>::input(StringRef Scalar, void *, Hex64 &Val) {
868  unsigned long long Num;
869  if (getAsUnsignedInteger(Scalar, 0, Num))
870    return "invalid hex64 number";
871  Val = Num;
872  return StringRef();
873}
874