568 lines
19 KiB
Diff
568 lines
19 KiB
Diff
This is a dump from Google's source control system of the change
|
|
that removed UCS-2 support from RE2. As the explanation below
|
|
says, UCS-2 mode is fundamentally at odds with things like ^ and $,
|
|
so it never really worked very well. But if you are interested in using
|
|
it without those operators, it did work for that. It assumed that the
|
|
UCS-2 data was in the native host byte order.
|
|
|
|
If you are interested in adding UCS-2 mode back, this patch might
|
|
be a good starting point.
|
|
|
|
|
|
Change 12780686 by rsc@rsc-re2 on 2009/09/16 15:30:15
|
|
|
|
Retire UCS-2 mode.
|
|
|
|
I added it as an experiment for V8, but it
|
|
requires 2-byte lookahead to do completely,
|
|
and RE2 has 1-byte lookahead (enough for UTF-8)
|
|
as a fairly deep fundamental assumption,
|
|
so it did not support ^ or $.
|
|
|
|
==== re2/bitstate.cc#2 - re2/bitstate.cc#3 ====
|
|
re2/bitstate.cc#2:314,321 - re2/bitstate.cc#3:314,319
|
|
cap_[0] = p;
|
|
if (TrySearch(prog_->start(), p)) // Match must be leftmost; done.
|
|
return true;
|
|
- if (prog_->flags() & Regexp::UCS2)
|
|
- p++;
|
|
}
|
|
return false;
|
|
}
|
|
==== re2/compile.cc#17 - re2/compile.cc#18 ====
|
|
re2/compile.cc#17:95,101 - re2/compile.cc#18:95,100
|
|
// Input encodings.
|
|
enum Encoding {
|
|
kEncodingUTF8 = 1, // UTF-8 (0-10FFFF)
|
|
- kEncodingUCS2, // UCS-2 (0-FFFF), native byte order
|
|
kEncodingLatin1, // Latin1 (0-FF)
|
|
};
|
|
|
|
re2/compile.cc#17:168,176 - re2/compile.cc#18:167,172
|
|
void AddRuneRangeLatin1(Rune lo, Rune hi, bool foldcase);
|
|
void AddRuneRangeUTF8(Rune lo, Rune hi, bool foldcase);
|
|
void Add_80_10ffff();
|
|
- void AddRuneRangeUCS2(Rune lo, Rune hi, bool foldcase);
|
|
- void AddUCS2Pair(uint8 lo1, uint8 hi1, bool fold1,
|
|
- uint8 lo2, uint8 hi2, bool fold2);
|
|
|
|
// New suffix that matches the byte range lo-hi, then goes to next.
|
|
Inst* RuneByteSuffix(uint8 lo, uint8 hi, bool foldcase, Inst* next);
|
|
re2/compile.cc#17:475,481 - re2/compile.cc#18:471,477
|
|
|
|
// Converts rune range lo-hi into a fragment that recognizes
|
|
// the bytes that would make up those runes in the current
|
|
- // encoding (Latin 1, UTF-8, or UCS-2).
|
|
+ // encoding (Latin 1 or UTF-8).
|
|
// This lets the machine work byte-by-byte even when
|
|
// using multibyte encodings.
|
|
|
|
re2/compile.cc#17:488,496 - re2/compile.cc#18:484,489
|
|
case kEncodingLatin1:
|
|
AddRuneRangeLatin1(lo, hi, foldcase);
|
|
break;
|
|
- case kEncodingUCS2:
|
|
- AddRuneRangeUCS2(lo, hi, foldcase);
|
|
- break;
|
|
}
|
|
}
|
|
|
|
re2/compile.cc#17:503,581 - re2/compile.cc#18:496,501
|
|
AddSuffix(RuneByteSuffix(lo, hi, foldcase, NULL));
|
|
}
|
|
|
|
- // Test whether 16-bit values are big or little endian.
|
|
- static bool BigEndian() {
|
|
- union {
|
|
- char byte[2];
|
|
- int16 endian;
|
|
- } u;
|
|
-
|
|
- u.byte[0] = 1;
|
|
- u.byte[1] = 2;
|
|
- return u.endian == 0x0102;
|
|
- }
|
|
-
|
|
- void Compiler::AddUCS2Pair(uint8 lo1, uint8 hi1, bool fold1,
|
|
- uint8 lo2, uint8 hi2, bool fold2) {
|
|
- Inst* ip;
|
|
- if (reversed_) {
|
|
- ip = RuneByteSuffix(lo1, hi1, fold1, NULL);
|
|
- ip = RuneByteSuffix(lo2, hi2, fold2, ip);
|
|
- } else {
|
|
- ip = RuneByteSuffix(lo2, hi2, fold2, NULL);
|
|
- ip = RuneByteSuffix(lo1, hi1, fold1, ip);
|
|
- }
|
|
- AddSuffix(ip);
|
|
- }
|
|
-
|
|
- void Compiler::AddRuneRangeUCS2(Rune lo, Rune hi, bool foldcase) {
|
|
- if (lo > hi || lo > 0xFFFF)
|
|
- return;
|
|
- if (hi > 0xFFFF)
|
|
- hi = 0xFFFF;
|
|
-
|
|
- // We'll assemble a pattern assuming big endian.
|
|
- // If the machine isn't, tell Cat to reverse its arguments.
|
|
- bool oldreversed = reversed_;
|
|
- if (!BigEndian()) {
|
|
- reversed_ = !oldreversed;
|
|
- }
|
|
-
|
|
- // Split into bytes.
|
|
- int lo1 = lo >> 8;
|
|
- int lo2 = lo & 0xFF;
|
|
- int hi1 = hi >> 8;
|
|
- int hi2 = hi & 0xFF;
|
|
-
|
|
- if (lo1 == hi1) {
|
|
- // Easy case: high bits are same in both.
|
|
- // Only do ASCII case folding on the second byte if the top byte is 00.
|
|
- AddUCS2Pair(lo1, lo1, false, lo2, hi2, lo1==0 && foldcase);
|
|
- } else {
|
|
- // Harder case: different second byte ranges depending on first byte.
|
|
-
|
|
- // Initial fragment.
|
|
- if (lo2 > 0) {
|
|
- AddUCS2Pair(lo1, lo1, false, lo2, 0xFF, lo1==0 && foldcase);
|
|
- lo1++;
|
|
- }
|
|
-
|
|
- // Trailing fragment.
|
|
- if (hi2 < 0xFF) {
|
|
- AddUCS2Pair(hi1, hi1, false, 0, hi2, false);
|
|
- hi1--;
|
|
- }
|
|
-
|
|
- // Inner ranges.
|
|
- if (lo1 <= hi1) {
|
|
- AddUCS2Pair(lo1, hi1, false, 0, 0xFF, false);
|
|
- }
|
|
- }
|
|
-
|
|
- // Restore reverse setting.
|
|
- reversed_ = oldreversed;
|
|
- }
|
|
-
|
|
// Table describing how to make a UTF-8 matching machine
|
|
// for the rune range 80-10FFFF (Runeself-Runemax).
|
|
// This range happens frequently enough (for example /./ and /[^a-z]/)
|
|
re2/compile.cc#17:707,716 - re2/compile.cc#18:627,634
|
|
|
|
Frag Compiler::Literal(Rune r, bool foldcase) {
|
|
switch (encoding_) {
|
|
- default: // UCS-2 or something new
|
|
- BeginRange();
|
|
- AddRuneRange(r, r, foldcase);
|
|
- return EndRange();
|
|
+ default:
|
|
+ return kNullFrag;
|
|
|
|
case kEncodingLatin1:
|
|
return ByteRange(r, r, foldcase);
|
|
re2/compile.cc#17:927,934 - re2/compile.cc#18:845,850
|
|
|
|
if (re->parse_flags() & Regexp::Latin1)
|
|
c.encoding_ = kEncodingLatin1;
|
|
- else if (re->parse_flags() & Regexp::UCS2)
|
|
- c.encoding_ = kEncodingUCS2;
|
|
c.reversed_ = reversed;
|
|
if (max_mem <= 0) {
|
|
c.max_inst_ = 100000; // more than enough
|
|
re2/compile.cc#17:983,993 - re2/compile.cc#18:899,905
|
|
c.prog_->set_start_unanchored(c.prog_->start());
|
|
} else {
|
|
Frag dot;
|
|
- if (c.encoding_ == kEncodingUCS2) {
|
|
- dot = c.Cat(c.ByteRange(0x00, 0xFF, false), c.ByteRange(0x00, 0xFF, false));
|
|
- } else {
|
|
- dot = c.ByteRange(0x00, 0xFF, false);
|
|
- }
|
|
+ dot = c.ByteRange(0x00, 0xFF, false);
|
|
Frag dotloop = c.Star(dot, true);
|
|
Frag unanchored = c.Cat(dotloop, all);
|
|
c.prog_->set_start_unanchored(unanchored.begin);
|
|
==== re2/nfa.cc#8 - re2/nfa.cc#9 ====
|
|
re2/nfa.cc#8:426,432 - re2/nfa.cc#9:426,431
|
|
const char* bp = context.begin();
|
|
int c = -1;
|
|
int wasword = 0;
|
|
- bool ucs2 = prog_->flags() & Regexp::UCS2;
|
|
|
|
if (text.begin() > context.begin()) {
|
|
c = text.begin()[-1] & 0xFF;
|
|
re2/nfa.cc#8:492,498 - re2/nfa.cc#9:491,497
|
|
// If there's a required first byte for an unanchored search
|
|
// and we're not in the middle of any possible matches,
|
|
// use memchr to search for the byte quickly.
|
|
- if (!ucs2 && !anchored && first_byte_ >= 0 && runq->size() == 0 &&
|
|
+ if (!anchored && first_byte_ >= 0 && runq->size() == 0 &&
|
|
p < text.end() && (p[0] & 0xFF) != first_byte_) {
|
|
p = reinterpret_cast<const char*>(memchr(p, first_byte_,
|
|
text.end() - p));
|
|
re2/nfa.cc#8:505,526 - re2/nfa.cc#9:504,514
|
|
flag = Prog::EmptyFlags(context, p);
|
|
}
|
|
|
|
- // In UCS-2 mode, if we need to start a new thread,
|
|
- // make sure to do it on an even boundary.
|
|
- if(ucs2 && runq->size() == 0 &&
|
|
- (p - context.begin()) % 2 && p < text.end()) {
|
|
- p++;
|
|
- flag = Prog::EmptyFlags(context, p);
|
|
- }
|
|
-
|
|
// Steal match storage (cleared but unused as of yet)
|
|
// temporarily to hold match boundaries for new thread.
|
|
- // In UCS-2 mode, only start the thread on a 2-byte boundary.
|
|
- if(!ucs2 || (p - context.begin()) % 2 == 0) {
|
|
- match_[0] = p;
|
|
- AddToThreadq(runq, start_, flag, p, match_);
|
|
- match_[0] = NULL;
|
|
- }
|
|
+ match_[0] = p;
|
|
+ AddToThreadq(runq, start_, flag, p, match_);
|
|
+ match_[0] = NULL;
|
|
}
|
|
|
|
// If all the threads have died, stop early.
|
|
==== re2/parse.cc#22 - re2/parse.cc#23 ====
|
|
re2/parse.cc#22:160,167 - re2/parse.cc#23:160,165
|
|
status_(status), stacktop_(NULL), ncap_(0) {
|
|
if (flags_ & Latin1)
|
|
rune_max_ = 0xFF;
|
|
- else if (flags & UCS2)
|
|
- rune_max_ = 0xFFFF;
|
|
else
|
|
rune_max_ = Runemax;
|
|
}
|
|
re2/parse.cc#22:365,387 - re2/parse.cc#23:363,374
|
|
bool Regexp::ParseState::PushCarat() {
|
|
if (flags_ & OneLine) {
|
|
return PushSimpleOp(kRegexpBeginText);
|
|
- } else {
|
|
- if (flags_ & UCS2) {
|
|
- status_->set_code(kRegexpUnsupported);
|
|
- status_->set_error_arg("multiline ^ in UCS-2 mode");
|
|
- return false;
|
|
- }
|
|
- return PushSimpleOp(kRegexpBeginLine);
|
|
}
|
|
+ return PushSimpleOp(kRegexpBeginLine);
|
|
}
|
|
|
|
// Pushes a \b or \B onto the stack.
|
|
bool Regexp::ParseState::PushWordBoundary(bool word) {
|
|
- if (flags_ & UCS2) {
|
|
- status_->set_code(kRegexpUnsupported);
|
|
- status_->set_error_arg("\\b or \\B in UCS-2 mode");
|
|
- return false;
|
|
- }
|
|
if (word)
|
|
return PushSimpleOp(kRegexpWordBoundary);
|
|
return PushSimpleOp(kRegexpNoWordBoundary);
|
|
re2/parse.cc#22:397,407 - re2/parse.cc#23:384,389
|
|
bool ret = PushSimpleOp(kRegexpEndText);
|
|
flags_ = oflags;
|
|
return ret;
|
|
- }
|
|
- if (flags_ & UCS2) {
|
|
- status_->set_code(kRegexpUnsupported);
|
|
- status_->set_error_arg("multiline $ in UCS-2 mode");
|
|
- return false;
|
|
}
|
|
return PushSimpleOp(kRegexpEndLine);
|
|
}
|
|
==== re2/re2.cc#34 - re2/re2.cc#35 ====
|
|
re2/re2.cc#34:79,86 - re2/re2.cc#35:79,84
|
|
return RE2::ErrorBadUTF8;
|
|
case re2::kRegexpBadNamedCapture:
|
|
return RE2::ErrorBadNamedCapture;
|
|
- case re2::kRegexpUnsupported:
|
|
- return RE2::ErrorUnsupported;
|
|
}
|
|
return RE2::ErrorInternal;
|
|
}
|
|
re2/re2.cc#34:122,130 - re2/re2.cc#35:120,125
|
|
break;
|
|
case RE2::Options::EncodingLatin1:
|
|
flags |= Regexp::Latin1;
|
|
- break;
|
|
- case RE2::Options::EncodingUCS2:
|
|
- flags |= Regexp::UCS2;
|
|
break;
|
|
}
|
|
|
|
==== re2/re2.h#36 - re2/re2.h#37 ====
|
|
re2/re2.h#36:246,252 - re2/re2.h#37:246,251
|
|
ErrorBadUTF8, // invalid UTF-8 in regexp
|
|
ErrorBadNamedCapture, // bad named capture group
|
|
ErrorPatternTooLarge, // pattern too large (compile failed)
|
|
- ErrorUnsupported, // unsupported feature (in UCS-2 mode)
|
|
};
|
|
|
|
// Predefined common options.
|
|
re2/re2.h#36:570,576 - re2/re2.h#37:569,574
|
|
|
|
enum Encoding {
|
|
EncodingUTF8 = 1,
|
|
- EncodingUCS2, // 16-bit Unicode 0-FFFF only
|
|
EncodingLatin1
|
|
};
|
|
|
|
==== re2/regexp.cc#15 - re2/regexp.cc#16 ====
|
|
re2/regexp.cc#15:324,333 - re2/regexp.cc#16:324,329
|
|
// the regexp that remains after the prefix. The prefix might
|
|
// be ASCII case-insensitive.
|
|
bool Regexp::RequiredPrefix(string *prefix, bool *foldcase, Regexp** suffix) {
|
|
- // Don't even bother for UCS-2; it's time to throw that code away.
|
|
- if (parse_flags_ & UCS2)
|
|
- return false;
|
|
-
|
|
// No need for a walker: the regexp must be of the form
|
|
// 1. some number of ^ anchors
|
|
// 2. a literal char or string
|
|
==== re2/regexp.h#20 - re2/regexp.h#21 ====
|
|
re2/regexp.h#20:187,193 - re2/regexp.h#21:187,192
|
|
kRegexpBadPerlOp, // bad perl operator
|
|
kRegexpBadUTF8, // invalid UTF-8 in regexp
|
|
kRegexpBadNamedCapture, // bad named capture
|
|
- kRegexpUnsupported, // unsupported operator
|
|
};
|
|
|
|
// Error status for certain operations.
|
|
re2/regexp.h#20:307,316 - re2/regexp.h#21:306,314
|
|
// \Q and \E to disable/enable metacharacters
|
|
// (?P<name>expr) for named captures
|
|
// \C to match any single byte
|
|
- UCS2 = 1<<10, // Text is in UCS-2, regexp is in UTF-8.
|
|
- UnicodeGroups = 1<<11, // Allow \p{Han} for Unicode Han group
|
|
+ UnicodeGroups = 1<<10, // Allow \p{Han} for Unicode Han group
|
|
// and \P{Han} for its negation.
|
|
- NeverNL = 1<<12, // Never match NL, even if the regexp mentions
|
|
+ NeverNL = 1<<11, // Never match NL, even if the regexp mentions
|
|
// it explicitly.
|
|
|
|
// As close to Perl as we can get.
|
|
==== re2/testing/backtrack.cc#4 - re2/testing/backtrack.cc#5 ====
|
|
re2/testing/backtrack.cc#4:134,141 - re2/testing/backtrack.cc#5:134,139
|
|
cap_[0] = p;
|
|
if (Visit(prog_->start(), p)) // Match must be leftmost; done.
|
|
return true;
|
|
- if (prog_->flags() & Regexp::UCS2)
|
|
- p++;
|
|
}
|
|
return false;
|
|
}
|
|
==== re2/testing/tester.cc#12 - re2/testing/tester.cc#13 ====
|
|
re2/testing/tester.cc#12:144,154 - re2/testing/tester.cc#13:144,152
|
|
static ParseMode parse_modes[] = {
|
|
{ single_line, "single-line" },
|
|
{ single_line|Regexp::Latin1, "single-line, latin1" },
|
|
- { single_line|Regexp::UCS2, "single-line, ucs2" },
|
|
{ multi_line, "multiline" },
|
|
{ multi_line|Regexp::NonGreedy, "multiline, nongreedy" },
|
|
{ multi_line|Regexp::Latin1, "multiline, latin1" },
|
|
- { multi_line|Regexp::UCS2, "multiline, ucs2" },
|
|
};
|
|
|
|
static string FormatMode(Regexp::ParseFlags flags) {
|
|
re2/testing/tester.cc#12:179,189 - re2/testing/tester.cc#13:177,185
|
|
RegexpStatus status;
|
|
regexp_ = Regexp::Parse(regexp_str, flags, &status);
|
|
if (regexp_ == NULL) {
|
|
- if (status.code() != kRegexpUnsupported) {
|
|
- LOG(INFO) << "Cannot parse: " << CEscape(regexp_str_)
|
|
- << " mode: " << FormatMode(flags);
|
|
- error_ = true;
|
|
- }
|
|
+ LOG(INFO) << "Cannot parse: " << CEscape(regexp_str_)
|
|
+ << " mode: " << FormatMode(flags);
|
|
+ error_ = true;
|
|
return;
|
|
}
|
|
prog_ = regexp_->CompileToProg(0);
|
|
re2/testing/tester.cc#12:230,237 - re2/testing/tester.cc#13:226,231
|
|
RE2::Options options;
|
|
if (flags & Regexp::Latin1)
|
|
options.set_encoding(RE2::Options::EncodingLatin1);
|
|
- else if (flags & Regexp::UCS2)
|
|
- options.set_encoding(RE2::Options::EncodingUCS2);
|
|
if (kind_ == Prog::kLongestMatch)
|
|
options.set_longest_match(true);
|
|
re2_ = new RE2(re, options);
|
|
re2/testing/tester.cc#12:281,379 - re2/testing/tester.cc#13:275,280
|
|
delete re2_;
|
|
}
|
|
|
|
- // Converts UTF-8 string in text into UCS-2 string in new_text.
|
|
- static bool ConvertUTF8ToUCS2(const StringPiece& text, StringPiece* new_text) {
|
|
- const char* p = text.begin();
|
|
- const char* ep = text.end();
|
|
- uint16* q = new uint16[ep - p];
|
|
- uint16* q0 = q;
|
|
-
|
|
- int n;
|
|
- Rune r;
|
|
- for (; p < ep; p += n) {
|
|
- if (!fullrune(p, ep - p)) {
|
|
- delete[] q0;
|
|
- return false;
|
|
- }
|
|
- n = chartorune(&r, p);
|
|
- if (r > 0xFFFF) {
|
|
- delete[] q0;
|
|
- return false;
|
|
- }
|
|
- *q++ = r;
|
|
- }
|
|
- *new_text = StringPiece(reinterpret_cast<char*>(q0), 2*(q - q0));
|
|
- return true;
|
|
- }
|
|
-
|
|
- // Rewrites *sp from being a pointer into text8 (UTF-8)
|
|
- // to being a pointer into text16 (equivalent text but in UCS-2).
|
|
- static void AdjustUTF8ToUCS2(const StringPiece& text8, const StringPiece& text16,
|
|
- StringPiece *sp) {
|
|
- if (sp->begin() == NULL && text8.begin() != NULL)
|
|
- return;
|
|
-
|
|
- int nrune = 0;
|
|
- int n;
|
|
- Rune r;
|
|
- const char* p = text8.begin();
|
|
- const char* ep = text8.end();
|
|
- const char* spbegin = NULL;
|
|
- const char* spend = NULL;
|
|
- for (;;) {
|
|
- if (p == sp->begin())
|
|
- spbegin = text16.begin() + sizeof(uint16)*nrune;
|
|
- if (p == sp->end())
|
|
- spend = text16.begin() + sizeof(uint16)*nrune;
|
|
- if (p >= ep)
|
|
- break;
|
|
- n = chartorune(&r, p);
|
|
- p += n;
|
|
- nrune++;
|
|
- }
|
|
- if (spbegin == NULL || spend == NULL) {
|
|
- LOG(FATAL) << "Error in AdjustUTF8ToUCS2 "
|
|
- << CEscape(text8) << " "
|
|
- << (int)(sp->begin() - text8.begin()) << " "
|
|
- << (int)(sp->end() - text8.begin());
|
|
- }
|
|
- *sp = StringPiece(spbegin, spend - spbegin);
|
|
- }
|
|
-
|
|
- // Rewrites *sp from begin a pointer into text16 (UCS-2)
|
|
- // to being a pointer into text8 (equivalent text but in UTF-8).
|
|
- static void AdjustUCS2ToUTF8(const StringPiece& text16, const StringPiece& text8,
|
|
- StringPiece* sp) {
|
|
- if (sp->begin() == NULL)
|
|
- return;
|
|
-
|
|
- int nrune = 0;
|
|
- int n;
|
|
- Rune r;
|
|
- const char* p = text8.begin();
|
|
- const char* ep = text8.end();
|
|
- const char* spbegin = NULL;
|
|
- const char* spend = NULL;
|
|
- for (;;) {
|
|
- if (nrune == (sp->begin() - text16.begin())/2)
|
|
- spbegin = p;
|
|
- if (nrune == (sp->end() - text16.begin())/2)
|
|
- spend = p;
|
|
- if (p >= ep)
|
|
- break;
|
|
- n = chartorune(&r, p);
|
|
- p += n;
|
|
- nrune++;
|
|
- }
|
|
- if (text8.begin() != NULL && (spbegin == NULL || spend == NULL)) {
|
|
- LOG(FATAL) << "Error in AdjustUCS2ToUTF8 "
|
|
- << CEscape(text16) << " "
|
|
- << (int)(sp->begin() - text16.begin()) << " "
|
|
- << (int)(sp->end() - text16.begin());
|
|
- }
|
|
- *sp = StringPiece(spbegin, spend - spbegin);
|
|
- }
|
|
-
|
|
// Runs a single search using the named engine type.
|
|
// This interface hides all the irregularities of the various
|
|
// engine interfaces from the rest of this file.
|
|
re2/testing/tester.cc#12:393,411 - re2/testing/tester.cc#13:294,300
|
|
|
|
StringPiece text = orig_text;
|
|
StringPiece context = orig_context;
|
|
- bool ucs2 = false;
|
|
|
|
- if ((flags() & Regexp::UCS2) && type != kEnginePCRE) {
|
|
- if (!ConvertUTF8ToUCS2(orig_context, &context)) {
|
|
- result->skipped = true;
|
|
- return;
|
|
- }
|
|
-
|
|
- // Rewrite context to refer to new text.
|
|
- AdjustUTF8ToUCS2(orig_context, context, &text);
|
|
- ucs2 = true;
|
|
- }
|
|
-
|
|
switch (type) {
|
|
default:
|
|
LOG(FATAL) << "Bad RunSearch type: " << (int)type;
|
|
re2/testing/tester.cc#12:557,577 - re2/testing/tester.cc#13:446,451
|
|
}
|
|
}
|
|
|
|
- // If we did UCS-2 matching, rewrite the matches to refer
|
|
- // to the original UTF-8 text.
|
|
- if (ucs2) {
|
|
- if (result->matched) {
|
|
- if (result->have_submatch0) {
|
|
- AdjustUCS2ToUTF8(context, orig_context, &result->submatch[0]);
|
|
- } else if (result->have_submatch) {
|
|
- for (int i = 0; i < nsubmatch; i++) {
|
|
- AdjustUCS2ToUTF8(context, orig_context, &result->submatch[i]);
|
|
- }
|
|
- }
|
|
- }
|
|
- delete[] context.begin();
|
|
- }
|
|
-
|
|
if (!result->matched)
|
|
memset(result->submatch, 0, sizeof result->submatch);
|
|
}
|
|
re2/testing/tester.cc#12:596,617 - re2/testing/tester.cc#13:470,475
|
|
return true;
|
|
}
|
|
|
|
- // Check whether text uses only Unicode points <= 0xFFFF
|
|
- // (in the BMP).
|
|
- static bool IsBMP(const StringPiece& text) {
|
|
- const char* p = text.begin();
|
|
- const char* ep = text.end();
|
|
- while (p < ep) {
|
|
- if (!fullrune(p, ep - p))
|
|
- return false;
|
|
- Rune r;
|
|
- p += chartorune(&r, p);
|
|
- if (r > 0xFFFF)
|
|
- return false;
|
|
- }
|
|
- return true;
|
|
- }
|
|
-
|
|
// Runs a single test.
|
|
bool TestInstance::RunCase(const StringPiece& text, const StringPiece& context,
|
|
Prog::Anchor anchor) {
|
|
re2/testing/tester.cc#12:619,625 - re2/testing/tester.cc#13:477,483
|
|
Result correct;
|
|
RunSearch(kEngineBacktrack, text, context, anchor, &correct);
|
|
if (correct.skipped) {
|
|
- if (regexp_ == NULL || !IsBMP(context)) // okay to skip in UCS-2 mode
|
|
+ if (regexp_ == NULL)
|
|
return true;
|
|
LOG(ERROR) << "Skipped backtracking! " << CEscape(regexp_str_)
|
|
<< " " << FormatMode(flags_);
|