| // Copyright Joyent, Inc. and other Node contributors. | |
| // | |
| // Permission is hereby granted, free of charge, to any person obtaining a | |
| // copy of this software and associated documentation files (the | |
| // "Software"), to deal in the Software without restriction, including | |
| // without limitation the rights to use, copy, modify, merge, publish, | |
| // distribute, sublicense, and/or sell copies of the Software, and to permit | |
| // persons to whom the Software is furnished to do so, subject to the | |
| // following conditions: | |
| // | |
| // The above copyright notice and this permission notice shall be included | |
| // in all copies or substantial portions of the Software. | |
| // | |
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
| // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN | |
| // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | |
| // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
| // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
| // USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| namespace node { | |
| namespace Buffer { | |
| static const size_t kMaxLength = v8::TypedArray::kMaxLength; | |
| typedef void (*FreeCallback)(char* data, void* hint); | |
| NODE_EXTERN bool HasInstance(v8::Local<v8::Value> val); | |
| NODE_EXTERN bool HasInstance(v8::Local<v8::Object> val); | |
| NODE_EXTERN char* Data(v8::Local<v8::Value> val); | |
| NODE_EXTERN char* Data(v8::Local<v8::Object> val); | |
| NODE_EXTERN size_t Length(v8::Local<v8::Value> val); | |
| NODE_EXTERN size_t Length(v8::Local<v8::Object> val); | |
| // public constructor - data is copied | |
| NODE_EXTERN v8::MaybeLocal<v8::Object> Copy(v8::Isolate* isolate, | |
| const char* data, | |
| size_t len); | |
| // public constructor | |
| NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate, size_t length); | |
| // public constructor from string | |
| NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate, | |
| v8::Local<v8::String> string, | |
| enum encoding enc = UTF8); | |
| // public constructor - data is used, callback is passed data on object gc | |
| NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate, | |
| char* data, | |
| size_t length, | |
| FreeCallback callback, | |
| void* hint); | |
| // public constructor - data is used. | |
| NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate, | |
| char* data, | |
| size_t len); | |
| // Creates a Buffer instance over an existing ArrayBuffer. | |
| NODE_EXTERN v8::MaybeLocal<v8::Uint8Array> New(v8::Isolate* isolate, | |
| v8::Local<v8::ArrayBuffer> ab, | |
| size_t byte_offset, | |
| size_t length); | |
| // This is verbose to be explicit with inline commenting | |
| static inline bool IsWithinBounds(size_t off, size_t len, size_t max) { | |
| // Asking to seek too far into the buffer | |
| // check to avoid wrapping in subsequent subtraction | |
| if (off > max) | |
| return false; | |
| // Asking for more than is left over in the buffer | |
| if (max - off < len) | |
| return false; | |
| // Otherwise we're in bounds | |
| return true; | |
| } | |
| } // namespace Buffer | |
| } // namespace node | |