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- // 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 unsigned int 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);
-
- // 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_
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