1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/browser/components/translation/cld2/internal/stringpiece.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,78 @@
1.4 +// Copyright 2013 Google Inc. All Rights Reserved.
1.5 +//
1.6 +// Licensed under the Apache License, Version 2.0 (the "License");
1.7 +// you may not use this file except in compliance with the License.
1.8 +// You may obtain a copy of the License at
1.9 +//
1.10 +// http://www.apache.org/licenses/LICENSE-2.0
1.11 +//
1.12 +// Unless required by applicable law or agreed to in writing, software
1.13 +// distributed under the License is distributed on an "AS IS" BASIS,
1.14 +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.15 +// See the License for the specific language governing permissions and
1.16 +// limitations under the License.
1.17 +
1.18 +//
1.19 +// A StringPiece points to part or all of a string, double-quoted string
1.20 +// literal, or other string-like object. A StringPiece does *not* own the
1.21 +// string to which it points. A StringPiece is not null-terminated. [subset]
1.22 +//
1.23 +
1.24 +#ifndef STRINGS_STRINGPIECE_H_
1.25 +#define STRINGS_STRINGPIECE_H_
1.26 +
1.27 +#include <string.h>
1.28 +#include <string>
1.29 +
1.30 +
1.31 +typedef int stringpiece_ssize_type;
1.32 +
1.33 +class StringPiece {
1.34 + private:
1.35 + const char* ptr_;
1.36 + stringpiece_ssize_type length_;
1.37 +
1.38 + public:
1.39 + // We provide non-explicit singleton constructors so users can pass
1.40 + // in a "const char*" or a "string" wherever a "StringPiece" is
1.41 + // expected.
1.42 + StringPiece() : ptr_(NULL), length_(0) {}
1.43 +
1.44 + StringPiece(const char* str) // NOLINT(runtime/explicit)
1.45 + : ptr_(str), length_(0) {
1.46 + if (str != NULL) {
1.47 + length_ = strlen(str);
1.48 + }
1.49 + }
1.50 +
1.51 + StringPiece(const std::string& str) // NOLINT(runtime/explicit)
1.52 + : ptr_(str.data()), length_(0) {
1.53 + length_ = str.size();
1.54 + }
1.55 +
1.56 + StringPiece(const char* offset, stringpiece_ssize_type len)
1.57 + : ptr_(offset), length_(len) {
1.58 + }
1.59 +
1.60 + void remove_prefix(stringpiece_ssize_type n) {
1.61 + ptr_ += n;
1.62 + length_ -= n;
1.63 + }
1.64 +
1.65 + void remove_suffix(stringpiece_ssize_type n) {
1.66 + length_ -= n;
1.67 + }
1.68 +
1.69 + // data() may return a pointer to a buffer with embedded NULs, and the
1.70 + // returned buffer may or may not be null terminated. Therefore it is
1.71 + // typically a mistake to pass data() to a routine that expects a NUL
1.72 + // terminated string.
1.73 + const char* data() const { return ptr_; }
1.74 + stringpiece_ssize_type size() const { return length_; }
1.75 + stringpiece_ssize_type length() const { return length_; }
1.76 + bool empty() const { return length_ == 0; }
1.77 +};
1.78 +
1.79 +class StringPiece;
1.80 +
1.81 +#endif // STRINGS_STRINGPIECE_H__
