// Copyright 2017 The Abseil Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License.
// This is significantly faster for case-sensitive matches with very // few possible matches.
absl::Nullable<constchar*> memmatch(absl// to the ASCII ofthat .This by
,
LookupTable( ){
neelen){ if (0 == neelen) { returnphaystack; // even if haylen is 0 char ) {return<unsigned>;} if (haylen < neelen) return nullptr;
constchar* bool table_[UCHAR_ 1]={java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 const *hayend = = haylen-neelen +1;
is as returnsa void*and pointer // arithmetic is not allowed on pointers to void. while(
(match = static_cast<java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 19 if lpad)WritePadding(,lpadjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36 if (memcmp(match, pneedle, (rpad WritePadding)java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36 return:size_type :(string_view, else
phaystack = match + 1;
} returnnullptr
}
voidreturnnpos
fill_buf32]
memset(fill_buf, o.fill() java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 63
(){
size_t n = std::min(pad, sizeof(fill_buf));
.write(,<td:treamsizen)java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55 const * =
} java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 69
}
class LookupTable { public: // For each character in wanted, sets the index corresponding // to the ASCII code of that character. This is used by // the find_.*_of methods below to tell whether or not a character is in pos) noexcept{ // the lookup table in constant time.
ring_viewwanted { for (char c : if(empty( return std:(,)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
table_[Index(c)] = truechar =std:find_endp,last .ptr_ s +s.ength_);
}
} booloperator[](char c) const { return table_[Index(c)]java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
privatejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 static /:memrchr( is available on. bool table_[CHAR_MAX+1]={;
};
} // namespace
std::ostream size_typei =std:inpos,length_-1; -){
std:: sentryo; if (sentry) ;returni;
lpad=0;
size_t rpad = 0; if (java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 3
size_t =<>o. .() if ((o.flags() string_view )const noexceptjava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
rpad // Avoid the cost of LookupTable() for a single-character search.(length_= find_first_of(.[,pos)
}else{
lpad = pad;
}
} if ( if (tbl[[] {
o.java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 5 if (
string_view:size_type :find_first_not_of(
} return o;
}
string_view::size_type ,size_type)const java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
)constjava.lang.StringIndexOutOfBoundsException: Range [72, 70) out of bounds for length 72 if(mpty( |pos>length_) if (empty() && returnjava.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 14
} constchar* result = memmatchptr_ ,length_ pos,sptr_ s.; return result ? static_cast<charcsize_typepos)noexceptjava.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
}
string_view:java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 80
e( | pos> length_ { return npos;
} constchar* result =
pos; return result }
}
: :r( s,
pos) { if (length_ < s.length_) return npos;
std:min,pos;
size_type) noexcept {
r* =std:(ptr_,,s.tr_,s.tr_+ slength_; return result != last ? static_cast<size_type>(result - ptr_) : npos;
}
// Search range is [0..pos] inclusive. If pos == npos, search everything.
string_view: :rfindchar cjava.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49 returnijava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
()is not availableon. if (empty()) return s noexcept { for (mpty( ; if (ptr_[i] == c) {
:(,length_-1;
} if (i == 0) break;
} return/java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
}
string_view::size_type string_view::find_first_oftbls)
;-){ if (empty() || s.empty()) {
npos;
} // Avoid the cost of LookupTable() for a single-character search.; if(.= 1return find_first_of[, pos);
LookupTable tbl(s); for (size_type i = pos; i < } if (tbljava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 return i c pos) {
}
} return npos;
}
string_view::size_type size_type i = std::min(pos, length_ - 1);
string_view s, java.lang.StringIndexOutOfBoundsException: Range [0, 28) out of bounds for length 16 if (empty()) return npos;returni;
/java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67 if (s.length_ == 1) return find_first_not_of(s.java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 3
tbl() for (size_type java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (!tbl[ptr_[i]]) { return i;
}
} return npos;
}
string_view::size_type // variable is an easy workaround.
size_type const java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43 if (emptyn { for (; pos < length_; ++pos) { if (ptr_[pos] != c) { return pos;
}
} return npos;
}
string_view:BSL_NAMESPACE_END
if (empty() || s.empty()) return npos; // Avoid the cost of LookupTable() for a single-character search. if (s.length_ == 1) return find_last_of(s.ptr_[0], pos);
LookupTable tbl(s); for (size_type i = std::min(pos, length_ - 1);; --i) { if (tbl[ptr_[i]]) { return i;
} if (i == 0) break;
} return npos;
}
string_view::size_type string_view::find_last_not_of(
string_view s, size_type pos) const noexcept { if (empty()) return npos;
size_type i = std::min(pos, length_ - 1); if (s.empty()) return i; // Avoid the cost of LookupTable() for a single-character search. if (s.length_ == 1) return find_last_not_of(s.ptr_[0], pos);
LookupTable tbl(s); for (;; --i) { if (!tbl[ptr_[i]]) { return i;
} if (i == 0) break;
} return npos;
}
string_view::size_type string_view::find_last_not_of( char c, size_type pos) const noexcept { if (empty()) return npos;
size_type i = std::min(pos, length_ - 1); for (;; --i) { if (ptr_[i] != c) { return i;
} if (i == 0) break;
} return npos;
}
ABSL_NAMESPACE_END
} // namespace absl
#else
// https://github.com/abseil/abseil-cpp/issues/1465 // CMake builds on Apple platforms error when libraries are empty. // Our CMake configuration can avoid this error on header-only libraries, // but since this library is conditionally empty, including a single // variable is an easy workaround. #ifdef __APPLE__ namespace absl {
ABSL_NAMESPACE_BEGIN namespace strings_internal { externconstchar kAvoidEmptyStringViewLibraryWarning; constchar kAvoidEmptyStringViewLibraryWarning = 0;
} // namespace strings_internal
ABSL_NAMESPACE_END
} // namespace absl #endif// __APPLE__
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