1 /********************* */
2 /*! \file antlr_input.cpp
4 ** Original author: Christopher L. Conway
5 ** Major contributors: Morgan Deters, Kshitij Bansal
6 ** Minor contributors (to current version): Francois Bobot
7 ** This file is part of the CVC4 project.
8 ** Copyright (c) 2009-2014 New York University and The University of Iowa
9 ** See the file COPYING in the top-level source directory for licensing
10 ** information.\endverbatim
12 ** \brief A super-class for ANTLR-generated input language parsers.
14 ** A super-class for ANTLR-generated input language parsers
21 #include "parser/antlr_input.h"
22 #include "parser/input.h"
23 #include "parser/bounded_token_buffer.h"
24 #include "parser/bounded_token_factory.h"
25 #include "parser/antlr_line_buffered_input.h"
26 #include "parser/memory_mapped_input_buffer.h"
27 #include "parser/parser_exception.h"
28 #include "parser/parser.h"
30 #include "expr/command.h"
31 #include "expr/type.h"
32 #include "parser/cvc/cvc_input.h"
33 #include "parser/smt1/smt1_input.h"
34 #include "parser/smt2/smt2_input.h"
35 #include "parser/tptp/tptp_input.h"
36 #include "util/output.h"
40 using namespace CVC4::parser
;
41 using namespace CVC4::kind
;
46 AntlrInputStream::AntlrInputStream(std::string name
,
47 pANTLR3_INPUT_STREAM input
,
48 bool fileIsTemporary
) :
49 InputStream(name
, fileIsTemporary
),
51 assert( input
!= NULL
);
52 input
->fileName
= input
->strFactory
->newStr8(input
->strFactory
, (pANTLR3_UINT8
)name
.c_str());
55 AntlrInputStream::~AntlrInputStream() {
56 d_input
->free(d_input
);
59 pANTLR3_INPUT_STREAM
AntlrInputStream::getAntlr3InputStream() const {
64 AntlrInputStream::newFileInputStream(const std::string
& name
,
66 throw (InputStreamException
) {
72 pANTLR3_INPUT_STREAM input
= NULL
;
74 input
= MemoryMappedInputBufferNew(name
);
76 // libantlr3c v3.2 isn't source-compatible with v3.4
77 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
78 input
= antlr3AsciiFileStreamNew((pANTLR3_UINT8
) name
.c_str());
79 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
80 input
= antlr3FileStreamNew((pANTLR3_UINT8
) name
.c_str(), ANTLR3_ENC_8BIT
);
81 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
84 throw InputStreamException("Couldn't open file: " + name
);
86 return new AntlrInputStream( name
, input
);
90 AntlrInputStream::newStreamInputStream(std::istream
& input
,
91 const std::string
& name
,
93 throw (InputStreamException
) {
95 pANTLR3_INPUT_STREAM inputStream
= NULL
;
98 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
100 antlr3LineBufferedStreamNew(input
,
102 (pANTLR3_UINT8
) strdup(name
.c_str()));
103 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
105 antlr3LineBufferedStreamNew(input
,
107 (pANTLR3_UINT8
) strdup(name
.c_str()));
108 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
111 // Since these are all NULL on entry, realloc will be called
112 char *basep
= NULL
, *boundp
= NULL
, *cp
= NULL
;
113 /* 64KB seems like a reasonable default size. */
114 size_t bufSize
= 0x10000;
116 /* Keep going until we can't go no more. */
117 while( !input
.eof() && !input
.fail() ) {
120 /* We ran out of room in the buffer. Realloc at double the size. */
121 ptrdiff_t offset
= cp
- basep
;
122 basep
= (char *) realloc(basep
, bufSize
);
123 if( basep
== NULL
) {
124 throw InputStreamException("Failed buffering input stream: " + name
);
127 boundp
= basep
+ bufSize
;
131 /* Read as much as we have room for. */
132 input
.read( cp
, boundp
- cp
);
133 cp
+= input
.gcount();
136 /* Make sure the fail bit didn't get set. */
138 throw InputStreamException("Stream input failed: " + name
);
141 /* Create an ANTLR input backed by the buffer. */
142 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
144 antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8
) basep
,
146 (pANTLR3_UINT8
) strdup(name
.c_str()));
147 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
149 antlr3StringStreamNew((pANTLR3_UINT8
) basep
,
152 (pANTLR3_UINT8
) strdup(name
.c_str()));
153 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
157 if( inputStream
== NULL
) {
158 throw InputStreamException("Couldn't initialize input: " + name
);
161 return new AntlrInputStream( name
, inputStream
);
166 AntlrInputStream::newStringInputStream(const std::string
& input
,
167 const std::string
& name
)
168 throw (InputStreamException
) {
169 char* inputStr
= strdup(input
.c_str());
170 char* nameStr
= strdup(name
.c_str());
171 assert( inputStr
!=NULL
&& nameStr
!=NULL
);
172 #ifdef CVC4_ANTLR3_OLD_INPUT_STREAM
173 pANTLR3_INPUT_STREAM inputStream
=
174 antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8
) inputStr
,
176 (pANTLR3_UINT8
) nameStr
);
177 #else /* CVC4_ANTLR3_OLD_INPUT_STREAM */
178 pANTLR3_INPUT_STREAM inputStream
=
179 antlr3StringStreamNew((pANTLR3_UINT8
) inputStr
,
182 (pANTLR3_UINT8
) nameStr
);
183 #endif /* CVC4_ANTLR3_OLD_INPUT_STREAM */
184 if( inputStream
==NULL
) {
185 throw InputStreamException("Couldn't initialize string input: '" + input
+ "'");
187 return new AntlrInputStream( name
, inputStream
);
190 AntlrInput
* AntlrInput::newInput(InputLanguage lang
, AntlrInputStream
& inputStream
) {
191 using namespace language::input
;
197 input
= new CvcInput(inputStream
);
201 input
= new Smt1Input(inputStream
);
204 case LANG_SMTLIB_V2_0
:
205 case LANG_SMTLIB_V2_5
:
206 input
= new Smt2Input(inputStream
, lang
);
210 input
= new TptpInput(inputStream
);
214 std::stringstream ss
;
215 ss
<< "internal error: unhandled language " << lang
<< " in AntlrInput::newInput";
216 throw InputStreamException(ss
.str());
222 AntlrInput::AntlrInput(AntlrInputStream
& inputStream
, unsigned int lookahead
) :
224 d_lookahead(lookahead
),
227 d_antlr3InputStream( inputStream
.getAntlr3InputStream() ),
228 d_tokenBuffer(NULL
) {
232 AntlrParser::AntlrParser(ExprManager* exprManager, std::istream& input, const std::string& name, unsigned int lookahead)
233 Parser(exprManager,name),
234 d_lookahead(lookahead) {
240 AntlrInput::Input(ExprManager* exprManager, const std::string& input, const std::string& name, unsigned int lookahead) :
241 Input(exprManager,name),
242 d_lookahead(lookahead),
245 d_tokenStream(NULL) {
247 char* inputStr = strdup(input.c_str());
248 char* nameStr = strdup(name.c_str());
249 if( inputStr==NULL || nameStr==NULL ) {
250 throw ParserException("Couldn't initialize string input: '" + input + "'");
252 d_inputStream = antlr3NewAsciiStringInPlaceStream((pANTLR3_UINT8)inputStr,input.size(),(pANTLR3_UINT8)nameStr);
253 if( d_inputStream == NULL ) {
254 throw ParserException("Couldn't create input stream for string: '" + input + "'");
260 AntlrInput::~AntlrInput() {
261 BoundedTokenBufferFree(d_tokenBuffer
);
264 pANTLR3_COMMON_TOKEN_STREAM
AntlrInput::getTokenStream() {
265 return d_tokenBuffer
->commonTstream
;
268 void AntlrInput::lexerError(pANTLR3_BASE_RECOGNIZER recognizer
) {
269 pANTLR3_LEXER lexer
= (pANTLR3_LEXER
)(recognizer
->super
);
271 Parser
*parser
= (Parser
*)(lexer
->super
);
272 assert(parser
!=NULL
);
273 AntlrInput
*input
= (AntlrInput
*) parser
->getInput();
276 /* Call the error display routine *if* there's not already a
277 * parse error pending. If a parser error is pending, this
278 * error is probably less important, so we just drop it. */
279 if( input
->d_parser
->rec
->state
->error
== ANTLR3_FALSE
) {
280 input
->parseError("Error finding next token.");
284 void AntlrInput::warning(const std::string
& message
) {
285 Warning() << getInputStream()->getName() << ':' << d_lexer
->getLine(d_lexer
) << '.' << d_lexer
->getCharPositionInLine(d_lexer
) << ": " << message
<< endl
;
290 * characters considered part of a simple symbol in SMTLIB.
292 * TODO: Ideally this code shouldn't be smtlib specific (should work
293 * with CVC language too), but this per-language specialization has
294 * been left for a later point.
296 inline bool isSimpleChar(char ch
) {
297 return isalnum(ch
) || (strchr("~!@$%^&*_-+=<>.?/", ch
) != NULL
);
300 size_t wholeWordMatch(string input
, string pattern
, bool (*isWordChar
)(char)) {
302 size_t N
= input
.size();
304 while( st
< N
&& (*isWordChar
)(input
[st
]) == false ) st
++;
306 while(en
+ 1 < N
&& (*isWordChar
)(input
[en
+ 1]) == true) en
++;
307 if(en
- st
+ 1 == pattern
.size()) {
309 for(size_t i
= 0; match
&& i
< pattern
.size(); ++i
) {
310 match
&= (pattern
[i
] == input
[st
+i
]);
322 * Gets part of original input and tries to visually hint where the
327 * ...nd (= alpha beta) (= beta delta))
330 * Implementation (as on 2014/04/24):
332 * > if suggested pointer by lexer is under a "simple char", move to
333 * start of the word and print pointer there.
335 * > in the other case, it tries to find the nearest word in the error
336 * message passed along. if it can't find it, we don't add this
337 * visual hint, as experimentally position suggested by lexer was
338 * found to be totally unhelpful. (TODO: fix this upstream to
341 std::string
parseErrorHelper(const char* lineStart
, int charPositionInLine
, const std::string
& message
)
343 // Is it a multi-line message
344 bool multilineMessage
= (message
.find('\n') != string::npos
);
345 // Useful only if it is a multi-line message
346 int firstLineEnd
= message
.find('\n');
348 std::ostringstream ss
, slicess
;
350 // Keep first line of message
351 if(multilineMessage
) {
352 ss
<< message
.substr(0, firstLineEnd
) << endl
<< endl
;
354 ss
<< message
<< endl
<< endl
;
357 int posSliceStart
= (charPositionInLine
- 50 <= 0) ? 0 : charPositionInLine
- 50 + 5;
358 int posSliceEnd
= posSliceStart
+ 70;
360 int caretPosExtra
= 0; // for inital intendation, epilipses etc.
362 ss
<< " "; caretPosExtra
+= 2;
363 if(posSliceStart
> 0) {
364 ss
<< "..."; caretPosExtra
+= 3;
367 for(int i
= posSliceStart
; lineStart
[i
] != '\n'; ++i
) {
368 if(i
== posSliceEnd
) {
372 if(i
< charPositionInLine
) { caretPos
++; }
374 if(!isprint(lineStart
[i
])) {
375 // non-printable character, something wrong, bail out
379 ss
<< (lineStart
[i
]);
380 slicess
<< (lineStart
[i
]);
383 // adjust position of caret, based on slice and message
385 int caretPosOrig
= caretPos
;
386 string slice
= slicess
.str();
387 if(isSimpleChar(slice
[caretPos
])) {
388 // if alphanumeric, try to go to beginning of word/number
389 while(caretPos
> 0 && isSimpleChar(slice
[caretPos
- 1])) { --caretPos
; }
390 if(caretPos
== 0 && posSliceStart
> 0) {
391 // reached start and this is not really the start? bail out
394 // likely it is also in original message? if so, very likely
395 // we found the right place
396 string word
= slice
.substr(caretPos
, (caretPosOrig
- caretPos
+ 1));
397 size_t matchLoc
= wholeWordMatch(message
, word
, isSimpleChar
);
398 Debug("friendlyparser") << "[friendlyparser] matchLoc = " << matchLoc
<< endl
;
399 if( matchLoc
!= string::npos
) {
400 Debug("friendlyparser") << "[friendlyparser] Feeling good." << std::endl
;
404 bool foundCaretPos
= false;
406 for(int tries
= 0; tries
< 2 && caretPos
> 0 && !foundCaretPos
; ++tries
) {
407 // go to nearest alphanumeric string (before current position),
408 // see if that word can be found in original message. If so,
409 // point to that, else keep pointer where it was.
410 int nearestWordEn
= caretPos
- 1;
411 while(nearestWordEn
> 0 && !isSimpleChar(slice
[nearestWordEn
])) {
414 if(isSimpleChar(slice
[nearestWordEn
])) {
415 int nearestWordSt
= nearestWordEn
;
416 while(nearestWordSt
> 0 && isSimpleChar(slice
[nearestWordSt
- 1])) {
419 string word
= slice
.substr(nearestWordSt
, (nearestWordEn
- nearestWordSt
+ 1));
420 size_t matchLoc
= wholeWordMatch(message
, word
, isSimpleChar
);
421 Debug("friendlyparser") << "[friendlyparser] nearest word = " << word
<< std::endl
;
422 Debug("friendlyparser") << "[friendlyparser] matchLoc = " << matchLoc
<< endl
;
423 if( matchLoc
!= string::npos
) {
424 Debug("friendlyparser") << "[friendlyparser] strong evidence that caret should be at "
425 << nearestWordSt
<< std::endl
;
426 foundCaretPos
= true;
428 caretPos
= nearestWordSt
;
431 if( !foundCaretPos
) {
432 // this doesn't look good. caret generally getting printed
433 // at unhelpful positions. improve upstream?
437 caretPos
+= caretPosExtra
;
438 }// end of caret position computation/heuristics
441 while( caretPos
-- > 0 ) {
445 if(multilineMessage
) {
446 ss
<< message
.substr(firstLineEnd
, message
.size() - firstLineEnd
);;
451 void AntlrInput::parseError(const std::string
& message
, bool eofException
)
452 throw (ParserException
) {
454 string updatedMessage
= parseErrorHelper((const char*)d_antlr3InputStream
->getLineBuf(d_antlr3InputStream
),
455 d_lexer
->getCharPositionInLine(d_lexer
),
458 Debug("parser") << "Throwing exception: "
459 << (const char*)d_lexer
->rec
->state
->tokSource
->fileName
->chars
<< ":"
460 << d_lexer
->getLine(d_lexer
) << "."
461 << d_lexer
->getCharPositionInLine(d_lexer
) << ": "
462 << updatedMessage
<< endl
;
464 throw ParserEndOfFileException(message
,
465 (const char*)d_lexer
->rec
->state
->tokSource
->fileName
->chars
,
466 d_lexer
->getLine(d_lexer
),
467 d_lexer
->getCharPositionInLine(d_lexer
));
469 throw ParserException(updatedMessage
,
470 (const char*)d_lexer
->rec
->state
->tokSource
->fileName
->chars
,
471 d_lexer
->getLine(d_lexer
),
472 d_lexer
->getCharPositionInLine(d_lexer
));
477 void AntlrInput::setAntlr3Lexer(pANTLR3_LEXER pLexer
) {
480 pANTLR3_TOKEN_FACTORY pTokenFactory
= d_lexer
->rec
->state
->tokFactory
;
481 if( pTokenFactory
!= NULL
) {
482 pTokenFactory
->close(pTokenFactory
);
485 /* 2*lookahead should be sufficient, but we give ourselves some breathing room. */
486 pTokenFactory
= BoundedTokenFactoryNew(d_antlr3InputStream
, 2*d_lookahead
);
487 if( pTokenFactory
== NULL
) {
488 throw InputStreamException("Couldn't create token factory.");
490 d_lexer
->rec
->state
->tokFactory
= pTokenFactory
;
492 pBOUNDED_TOKEN_BUFFER buffer
= BoundedTokenBufferSourceNew(d_lookahead
, d_lexer
->rec
->state
->tokSource
);
493 if( buffer
== NULL
) {
494 throw InputStreamException("Couldn't create token buffer.");
497 d_tokenBuffer
= buffer
;
499 // Override default lexer error reporting
500 d_lexer
->rec
->reportError
= &lexerError
;
501 // Override default nextToken function, just to prevent exceptions escaping.
502 d_lexer
->rec
->state
->tokSource
->nextToken
= &nextToken
;
505 void AntlrInput::setParser(Parser
& parser
) {
506 // ANTLR isn't using super in the lexer or the parser, AFAICT.
507 // We could also use @lexer/parser::context to add a field to the generated
508 // objects, but then it would have to be declared separately in every
509 // language's grammar and we'd have to in the address of the field anyway.
510 d_lexer
->super
= &parser
;
511 d_parser
->super
= &parser
;
514 void AntlrInput::setAntlr3Parser(pANTLR3_PARSER pParser
) {
516 // d_parser->rec->match = &match;
517 d_parser
->rec
->reportError
= &reportError
;
518 /* Don't try to recover from a parse error. */
519 // [chris 4/5/2010] Not clear on why this cast is necessary, but I get an error if I remove it.
520 d_parser
->rec
->recoverFromMismatchedToken
=
521 (void* (*)(ANTLR3_BASE_RECOGNIZER_struct
*, ANTLR3_UINT32
, ANTLR3_BITSET_LIST_struct
*))
522 d_parser
->rec
->mismatch
;
525 }/* CVC4::parser namespace */
526 }/* CVC4 namespace */