browser/components/translation/cld2/internal/stringpiece.h@6474c204b198 (annotated)
browser/components/translation/cld2/internal/stringpiece.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright 2013 Google Inc. All Rights Reserved. |
| michael@0 | 2 | // |
| michael@0 | 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| michael@0 | 4 | // you may not use this file except in compliance with the License. |
| michael@0 | 5 | // You may obtain a copy of the License at |
| michael@0 | 6 | // |
| michael@0 | 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| michael@0 | 8 | // |
| michael@0 | 9 | // Unless required by applicable law or agreed to in writing, software |
| michael@0 | 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| michael@0 | 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| michael@0 | 12 | // See the License for the specific language governing permissions and |
| michael@0 | 13 | // limitations under the License. |
| michael@0 | 14 | |
| michael@0 | 15 | // |
| michael@0 | 16 | // A StringPiece points to part or all of a string, double-quoted string |
| michael@0 | 17 | // literal, or other string-like object. A StringPiece does *not* own the |
| michael@0 | 18 | // string to which it points. A StringPiece is not null-terminated. [subset] |
| michael@0 | 19 | // |
| michael@0 | 20 | |
| michael@0 | 21 | #ifndef STRINGS_STRINGPIECE_H_ |
| michael@0 | 22 | #define STRINGS_STRINGPIECE_H_ |
| michael@0 | 23 | |
| michael@0 | 24 | #include <string.h> |
| michael@0 | 25 | #include <string> |
| michael@0 | 26 | |
| michael@0 | 27 | |
| michael@0 | 28 | typedef int stringpiece_ssize_type; |
| michael@0 | 29 | |
| michael@0 | 30 | class StringPiece { |
| michael@0 | 31 | private: |
| michael@0 | 32 | const char* ptr_; |
| michael@0 | 33 | stringpiece_ssize_type length_; |
| michael@0 | 34 | |
| michael@0 | 35 | public: |
| michael@0 | 36 | // We provide non-explicit singleton constructors so users can pass |
| michael@0 | 37 | // in a "const char*" or a "string" wherever a "StringPiece" is |
| michael@0 | 38 | // expected. |
| michael@0 | 39 | StringPiece() : ptr_(NULL), length_(0) {} |
| michael@0 | 40 | |
| michael@0 | 41 | StringPiece(const char* str) // NOLINT(runtime/explicit) |
| michael@0 | 42 | : ptr_(str), length_(0) { |
| michael@0 | 43 | if (str != NULL) { |
| michael@0 | 44 | length_ = strlen(str); |
| michael@0 | 45 | } |
| michael@0 | 46 | } |
| michael@0 | 47 | |
| michael@0 | 48 | StringPiece(const std::string& str) // NOLINT(runtime/explicit) |
| michael@0 | 49 | : ptr_(str.data()), length_(0) { |
| michael@0 | 50 | length_ = str.size(); |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | StringPiece(const char* offset, stringpiece_ssize_type len) |
| michael@0 | 54 | : ptr_(offset), length_(len) { |
| michael@0 | 55 | } |
| michael@0 | 56 | |
| michael@0 | 57 | void remove_prefix(stringpiece_ssize_type n) { |
| michael@0 | 58 | ptr_ += n; |
| michael@0 | 59 | length_ -= n; |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | void remove_suffix(stringpiece_ssize_type n) { |
| michael@0 | 63 | length_ -= n; |
| michael@0 | 64 | } |
| michael@0 | 65 | |
| michael@0 | 66 | // data() may return a pointer to a buffer with embedded NULs, and the |
| michael@0 | 67 | // returned buffer may or may not be null terminated. Therefore it is |
| michael@0 | 68 | // typically a mistake to pass data() to a routine that expects a NUL |
| michael@0 | 69 | // terminated string. |
| michael@0 | 70 | const char* data() const { return ptr_; } |
| michael@0 | 71 | stringpiece_ssize_type size() const { return length_; } |
| michael@0 | 72 | stringpiece_ssize_type length() const { return length_; } |
| michael@0 | 73 | bool empty() const { return length_ == 0; } |
| michael@0 | 74 | }; |
| michael@0 | 75 | |
| michael@0 | 76 | class StringPiece; |
| michael@0 | 77 | |
| michael@0 | 78 | #endif // STRINGS_STRINGPIECE_H__ |
