1 // Copyright 2011 Google Inc. All Rights Reserved.
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
7 // http://www.apache.org/licenses/LICENSE-2.0
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
15 #ifndef NINJA_STRINGPIECE_H_
16 #define NINJA_STRINGPIECE_H_
24 /// StringPiece represents a slice of a string whose memory is managed
25 /// externally. It is useful for reducing the number of std::strings
26 /// we need to allocate.
28 StringPiece() : str_(NULL), len_(0) {}
30 /// The constructors intentionally allow for implicit conversions.
31 StringPiece(const string& str) : str_(str.data()), len_(str.size()) {}
32 StringPiece(const char* str) : str_(str), len_(strlen(str)) {}
34 StringPiece(const char* str, size_t len) : str_(str), len_(len) {}
36 bool operator==(const StringPiece& other) const {
37 return len_ == other.len_ && memcmp(str_, other.str_, len_) == 0;
39 bool operator!=(const StringPiece& other) const {
40 return !(*this == other);
43 /// Convert the slice into a full-fledged std::string, copying the
44 /// data into a new string.
45 string AsString() const {
46 return len_ ? string(str_, len_) : string();
53 #endif // NINJA_STRINGPIECE_H_