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Diffstat (limited to 'src/string_piece.h')
-rw-r--r-- | src/string_piece.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/string_piece.h b/src/string_piece.h new file mode 100644 index 0000000..0e55afb --- /dev/null +++ b/src/string_piece.h @@ -0,0 +1,51 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// 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 +// +// http://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. + +#ifndef NINJA_STRINGPIECE_H_ +#define NINJA_STRINGPIECE_H_ + +#include <string> + +using namespace std; + +#include <string.h> + +/// StringPiece represents a slice of a string whose memory is managed +/// externally. It is useful for reducing the number of std::strings +/// we need to allocate. +struct StringPiece { + StringPiece() : str_(NULL), len_(0) {} + + /// The constructors intentionally allow for implicit conversions. + StringPiece(const string& str) : str_(str.data()), len_(str.size()) {} + StringPiece(const char* str) : str_(str), len_(strlen(str)) {} + + bool operator==(const StringPiece& other) const { + return len_ == other.len_ && memcmp(str_, other.str_, len_) == 0; + } + bool operator!=(const StringPiece& other) const { + return !(*this == other); + } + + /// Convert the slice into a full-fledged std::string, copying the + /// data into a new string. + string AsString() const { + return string(str_, len_); + } + + const char* str_; + int len_; +}; + +#endif // NINJA_BROWSE_H_ |