The Tor Browser / file comparison
comparison: browser/components/translation/cld2/internal/stringpiece.h
browser/components/translation/cld2/internal/stringpiece.h
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| 1 // Copyright 2013 Google Inc. All Rights Reserved. | |
| 2 // | |
| 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 | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 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. | |
| 14 | |
| 15 // | |
| 16 // A StringPiece points to part or all of a string, double-quoted string | |
| 17 // literal, or other string-like object. A StringPiece does *not* own the | |
| 18 // string to which it points. A StringPiece is not null-terminated. [subset] | |
| 19 // | |
| 20 | |
| 21 #ifndef STRINGS_STRINGPIECE_H_ | |
| 22 #define STRINGS_STRINGPIECE_H_ | |
| 23 | |
| 24 #include <string.h> | |
| 25 #include <string> | |
| 26 | |
| 27 | |
| 28 typedef int stringpiece_ssize_type; | |
| 29 | |
| 30 class StringPiece { | |
| 31 private: | |
| 32 const char* ptr_; | |
| 33 stringpiece_ssize_type length_; | |
| 34 | |
| 35 public: | |
| 36 // We provide non-explicit singleton constructors so users can pass | |
| 37 // in a "const char*" or a "string" wherever a "StringPiece" is | |
| 38 // expected. | |
| 39 StringPiece() : ptr_(NULL), length_(0) {} | |
| 40 | |
| 41 StringPiece(const char* str) // NOLINT(runtime/explicit) | |
| 42 : ptr_(str), length_(0) { | |
| 43 if (str != NULL) { | |
| 44 length_ = strlen(str); | |
| 45 } | |
| 46 } | |
| 47 | |
| 48 StringPiece(const std::string& str) // NOLINT(runtime/explicit) | |
| 49 : ptr_(str.data()), length_(0) { | |
| 50 length_ = str.size(); | |
| 51 } | |
| 52 | |
| 53 StringPiece(const char* offset, stringpiece_ssize_type len) | |
| 54 : ptr_(offset), length_(len) { | |
| 55 } | |
| 56 | |
| 57 void remove_prefix(stringpiece_ssize_type n) { | |
| 58 ptr_ += n; | |
| 59 length_ -= n; | |
| 60 } | |
| 61 | |
| 62 void remove_suffix(stringpiece_ssize_type n) { | |
| 63 length_ -= n; | |
| 64 } | |
| 65 | |
| 66 // data() may return a pointer to a buffer with embedded NULs, and the | |
| 67 // returned buffer may or may not be null terminated. Therefore it is | |
| 68 // typically a mistake to pass data() to a routine that expects a NUL | |
| 69 // terminated string. | |
| 70 const char* data() const { return ptr_; } | |
| 71 stringpiece_ssize_type size() const { return length_; } | |
| 72 stringpiece_ssize_type length() const { return length_; } | |
| 73 bool empty() const { return length_ == 0; } | |
| 74 }; | |
| 75 | |
| 76 class StringPiece; | |
| 77 | |
| 78 #endif // STRINGS_STRINGPIECE_H__ |
