| // 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_ |