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#ifndef NODE_BUFFER_H_
#define NODE_BUFFER_H_
#include <node.h>
#include <node_object_wrap.h>
#include <v8.h>
#include <assert.h>
namespace node {
/* A buffer is a chunk of memory stored outside the V8 heap, mirrored by an
* object in javascript. The object is not totally opaque, one can access
* individual bytes with [] and slice it into substrings or sub-buffers
* without copying memory.
*
* // return an ascii encoded string - no memory is copied
* buffer.asciiSlice(0, 3)
*/
class Buffer : public ObjectWrap {
public:
~Buffer();
typedef void (*free_callback)(char *data, void *hint);
// C++ API for constructing fast buffer
static v8::Handle<v8::Object> New(v8::Handle<v8::String> string);
static void Initialize(v8::Handle<v8::Object> target);
static Buffer* New(size_t length); // public constructor
static Buffer* New(char *data, size_t len); // public constructor
static Buffer* New(char *data, size_t length,
free_callback callback, void *hint); // public constructor
static bool HasInstance(v8::Handle<v8::Value> val);
static inline char* Data(v8::Handle<v8::Object> obj) {
return (char*)obj->GetIndexedPropertiesExternalArrayData();
}
static inline size_t Length(v8::Handle<v8::Object> obj) {
return (size_t)obj->GetIndexedPropertiesExternalArrayDataLength();
}
private:
static v8::Persistent<v8::FunctionTemplate> constructor_template;
static v8::Handle<v8::Value> New(const v8::Arguments &args);
static v8::Handle<v8::Value> BinarySlice(const v8::Arguments &args);
static v8::Handle<v8::Value> AsciiSlice(const v8::Arguments &args);
static v8::Handle<v8::Value> Base64Slice(const v8::Arguments &args);
static v8::Handle<v8::Value> Utf8Slice(const v8::Arguments &args);
static v8::Handle<v8::Value> BinaryWrite(const v8::Arguments &args);
static v8::Handle<v8::Value> Base64Write(const v8::Arguments &args);
static v8::Handle<v8::Value> AsciiWrite(const v8::Arguments &args);
static v8::Handle<v8::Value> Utf8Write(const v8::Arguments &args);
static v8::Handle<v8::Value> ByteLength(const v8::Arguments &args);
static v8::Handle<v8::Value> MakeFastBuffer(const v8::Arguments &args);
static v8::Handle<v8::Value> Copy(const v8::Arguments &args);
Buffer(v8::Handle<v8::Object> wrapper, size_t length);
void Replace(char *data, size_t length, free_callback callback, void *hint);
size_t length_;
char* data_;
free_callback callback_;
void* callback_hint_;
};
} // namespace node buffer
#endif // NODE_BUFFER_H_
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