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static int | FailSearch (StringSearch< PatternChar, SubjectChar > *, Vector< const SubjectChar >, int) |
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static int | SingleCharSearch (StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index) |
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static int | LinearSearch (StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index) |
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static int | InitialSearch (StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index) |
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static int | BoyerMooreHorspoolSearch (StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index) |
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static int | BoyerMooreSearch (StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index) |
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static bool | exceedsOneByte (uint8_t c) |
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static bool | exceedsOneByte (uint16_t c) |
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static int | CharOccurrence (int *bad_char_occurrence, SubjectChar char_code) |
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static bool | IsOneByteString (Vector< const uint8_t > string) |
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static bool | IsOneByteString (Vector< const uc16 > string) |
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template<typename PatternChar, typename SubjectChar>
class v8::internal::StringSearch< PatternChar, SubjectChar >
Definition at line 54 of file string-search.h.
template<typename PatternChar , typename SubjectChar >
Definition at line 407 of file string-search.h.
411 Vector<const PatternChar> pattern = search->pattern_;
412 int subject_length = subject.length();
413 int pattern_length = pattern.length();
414 int* char_occurrences = search->bad_char_table();
415 int badness = -pattern_length;
418 PatternChar last_char = pattern[pattern_length - 1];
419 int last_char_shift = pattern_length - 1 -
420 CharOccurrence(char_occurrences,
static_cast<SubjectChar
>(last_char));
422 int index = start_index;
423 while (index <= subject_length - pattern_length) {
424 int j = pattern_length - 1;
426 while (last_char != (subject_char = subject[index + j])) {
428 int shift = j - bc_occ;
430 badness += 1 -
shift;
431 if (index > subject_length - pattern_length) {
436 while (j >= 0 && pattern[j] == (subject[index + j])) j--;
440 index += last_char_shift;
445 badness += (pattern_length - j) - last_char_shift;
447 search->PopulateBoyerMooreTable();
static int BoyerMooreSearch(StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index)
static int CharOccurrence(int *bad_char_occurrence, SubjectChar char_code)
enable harmony numeric enable harmony object literal extensions Optimize object Array shift
References v8::internal::StringSearch< PatternChar, SubjectChar >::bad_char_table(), v8::internal::Vector< T >::length(), v8::internal::StringSearch< PatternChar, SubjectChar >::pattern_, v8::internal::StringSearch< PatternChar, SubjectChar >::PopulateBoyerMooreTable(), shift, and v8::internal::StringSearch< PatternChar, SubjectChar >::strategy_.
template<typename PatternChar , typename SubjectChar >
template<typename PatternChar , typename SubjectChar >
Definition at line 492 of file string-search.h.
496 Vector<const PatternChar> pattern = search->pattern_;
497 int pattern_length = pattern.length();
501 int badness = -10 - (pattern_length << 2);
505 PatternChar pattern_first_char = pattern[0];
506 for (
int i = index, n = subject.length() - pattern_length;
i <= n;
i++) {
509 if (
sizeof(SubjectChar) == 1 &&
sizeof(PatternChar) == 1) {
510 const SubjectChar* pos =
reinterpret_cast<const SubjectChar*
>(
511 memchr(subject.start() +
i,
517 i =
static_cast<int>(pos - subject.start());
519 if (subject[
i] != pattern_first_char)
continue;
523 if (pattern[j] != subject[
i + j]) {
527 }
while (j < pattern_length);
528 if (j == pattern_length) {
533 search->PopulateBoyerMooreHorspoolTable();
static int BoyerMooreHorspoolSearch(StringSearch< PatternChar, SubjectChar > *search, Vector< const SubjectChar > subject, int start_index)
enable harmony numeric enable harmony object literal extensions Optimize object Array DOM strings and string trace pretenuring decisions of HAllocate instructions Enables optimizations which favor memory size over execution speed maximum source size in bytes considered for a single inlining maximum cumulative number of AST nodes considered for inlining trace the tracking of allocation sites deoptimize every n garbage collections perform array bounds checks elimination analyze liveness of environment slots and zap dead values flushes the cache of optimized code for closures on every GC allow uint32 values on optimize frames if they are used only in safe operations track concurrent recompilation artificial compilation delay in ms do not emit check maps for constant values that have a leaf deoptimize the optimized code if the layout of the maps changes enable context specialization in TurboFan execution budget before interrupt is triggered max percentage of megamorphic generic ICs to allow optimization enable use of SAHF instruction if enable use of VFP3 instructions if available enable use of NEON instructions if enable use of SDIV and UDIV instructions if enable use of MLS instructions if enable loading bit constant by means of movw movt instruction enable unaligned accesses for enable use of d16 d31 registers on ARM this requires VFP3 force all emitted branches to be in long enable alignment of csp to bytes on platforms which prefer the register to always be NULL
References v8::internal::Vector< T >::length(), NULL, v8::internal::StringSearch< PatternChar, SubjectChar >::pattern_, v8::internal::StringSearch< PatternChar, SubjectChar >::PopulateBoyerMooreHorspoolTable(), v8::internal::Vector< T >::start(), and v8::internal::StringSearch< PatternChar, SubjectChar >::strategy_.
Referenced by v8::internal::StringSearch< PatternChar, SubjectChar >::StringSearch().
template<typename PatternChar , typename SubjectChar >
Definition at line 247 of file string-search.h.
251 Vector<const PatternChar> pattern = search->pattern_;
252 DCHECK(pattern.length() > 1);
253 int pattern_length = pattern.length();
254 PatternChar pattern_first_char = pattern[0];
256 int n = subject.length() - pattern_length;
258 if (
sizeof(SubjectChar) == 1 &&
sizeof(PatternChar) == 1) {
259 const SubjectChar* pos =
reinterpret_cast<const SubjectChar*
>(
260 memchr(subject.start() +
i,
263 if (pos ==
NULL)
return -1;
264 i =
static_cast<int>(pos - subject.start()) + 1;
266 if (subject[
i++] != pattern_first_char)
continue;
272 pattern_length - 1)) {
bool CharCompare(const PatternChar *pattern, const SubjectChar *subject, int length)
References v8::internal::CharCompare(), DCHECK, v8::internal::Vector< T >::length(), NULL, v8::internal::StringSearch< PatternChar, SubjectChar >::pattern_, and v8::internal::Vector< T >::start().
Referenced by v8::internal::StringSearch< PatternChar, SubjectChar >::StringSearch().
template<typename PatternChar , typename SubjectChar >