// 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. #ifndef SRC_NODE_BUFFER_H_ #define SRC_NODE_BUFFER_H_ #include "node.h" #include "v8.h" 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 #endif // SRC_NODE_BUFFER_H_