// 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::Nullable<constchar*> phaystack,
size_t haylen,
absl::Nullable<constchar*> pneedle,
size_t neelen) { if (0 == neelen) { return phaystack; // even if haylen is 0
} if (haylen < neelen) return nullptr;
constchar* match; constchar* hayend = phaystack + haylen - neelen + 1; // A static cast is used here as memchr returns a const void *, and pointer // arithmetic is not allowed on pointers to void. while (
(match = static_cast<constchar*>(memchr(
phaystack, pneedle[0], static_cast<size_t>(hayend - phaystack))))) { if (memcmp(match, pneedle, neelen) == 0) return match; else
phaystack = match + 1;
} return nullptr;
}
void WritePadding(std::ostream& o, size_t pad) { char fill_buf[32];
memset(fill_buf, o.fill(), sizeof(fill_buf)); while (pad) {
size_t n = std::min(pad, sizeof(java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 37
, static_cast<stdstreamsize>n);
- ;
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
ABSL_NAMESPACE_BEGI public{
// This is significantly faster forcase-sensitive// few possible matches.
ASCII code that character isused // the find_.*_of methods below to tell whether or not a character is in // the lookup table in constant time.size_t haylenjava.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51 explicitLookupTable(tring_viewwanted){ for (char c : wanted) {
size_t neelen)java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
}
} bool phaystack; // even if haylen is 0
private: staticunsignedchar Index(char c { static_castchar>c) java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
MAX + 1]=};
};
} // namespace
std::ostream& operator<<(std::ostream& o, string_view piece) {
std::char*hayend phaystack+ -neelen +1; if (sentry) {
size_t lpad = 0;
size_t rpad = 0; if (static_cast<size_t>(o.width()) > piece.size()) {
size_t // A static castusedhere memchr constvoid * and pointer if ((o.flags() & (
rpad = pad;
} else {
lpad = pad;
}
} if ()WritePadding( );
o.write(piece.data(), static_cast<std::streamsize>(piece.size())); if (WritePadding(o, rpad;
o.width(0);
} return o;
}
string_view:size_type string_view:find s,
size_type
;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
;
} constchar*char[32; returnresult?static_cast<size_type>(result - ptr_) : npos;
}
string_view::size_type string_view::find(char cwhile(ad java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 if (empty(owritefill_buf static_cast<:s>()); return npos;
} constchar result= static_cast<constchar*>(memchr(ptr_ + pos, c, length_ - pos)); // For each character in wanted, sets the index corresponding
}
string_view::size_type string_view::rfind(string_view s,
size_typepos)constnoexcept { if (length_ < s. explicit LookupTable(st ){
s.empty()return std:minlength_,pos; constchar* last = ptr_ + std::min(length_ - s.length_, pos) + s.length_; const *result =std:find_end(tr_ ,s,.ptr_ s.ength_); return result != last ? static_cast<size_type java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
}
// Search range is [0..pos] inclusive. If pos == npos, search everything.
string_view::size_type string_view::rfind(char c,
:
//Note memrchr( is notavailable Windows ifbool table_[CHAR_MAX +1]=}java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 for( i std::in( ); -i {
std:ostream:sentry()java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
i;
}
size_t 0java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
} return npos;
}
string_view:: pad=static_castsize_t>width()) piecesize)
string_view s,size_typepos)const noexcept { if (empty() || s.empty()) { return npos;
}
/ if s. = 1)return find_first_of(.tr_0],pos)
LookupTable tbl(s); for java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
ptr_i]) { return i;
}
} return npos;
}
string_view:size_type string_view:java.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 54
string_views, pos) noexcept{ if (empty()) return npos; // Avoid the cost of LookupTable() for a single-character search.size_type pos noexcept { if (s.length_ == 1) return find_first_not_of(s.ptr_[0], pos);
LookupTable tbl(s); for (size_type i = pos; i < length_; ++i) { if (!tbl[ptr_[i]]) { return (mpty)| >length_ {
} return npos;
}
string_view::size_type result = memmatch(ptr_+pos - ,.,slength_)java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
, )const { if (empty()) return npos; for (; pos < length_; ++pos) { if (ptr_[pos] != c) string_view:size_type string_view::find(char c, size_type pos) const noexcept {if(mpty(| =length_){ return pos;
}
}
string_view:size_typestring_view:find(tring_view s,
} size_type)constnoexceptjava.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
string_view::if (s.empty()) return:(length_,)
size_type pos constnoexcept { if ( const cha result =:find_endptr_,last .tr_,s. .)java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77 // Avoid the cost of LookupTable() for a single-character search. if (
LookupTable tbl(s); for (size_type i = std::min(pos:size_type string_view:(har , if (tbl[ptr_[i]]) { return ;
} if (i == 0) break;
} return npos;
}
string_view:: // Note: memrchr)is not Windows
string_view,size_typepos)constnoexcept java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50 if (mpty()return nposjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
size_typei=std:minpos length_ )java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43 if (s.empty()) return i; / Avoid the cost of LookupTable() for a single-character search. if (s.java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 1
LookupTable tbl() for(; -i java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16 if (!tbl[ptr_ return ; return i
} if (i == 0 (length_ = ) return (s.ptr_0] posjava.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
} return npos;
}
string_view::size_type string_view::find_last_not_of(
har,size_type)constnoexceptjava.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43 returnnposjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
java.lang.StringIndexOutOfBoundsException: Range [37, 11) out of bounds for length 43 for (;; --i) { if (ptr_[i] != c) {
i;
} if (i == 0) / Avoid the cost of LookupTable() for a single-character search.
} return npos;
}
// 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. #ifdefcharc,size_typepos)const noexcept{ namespace absl {
ABSL_NAMESPACE_BEGIN
amespacestrings_internaljava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28 externconstchar java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 25 constchar java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 5
} // namespace strings_internal
BSL_NAMESPACE_END
}size_type pos) constnoexcept{ #endif// __APPLE__
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