node/src/node_buffer.h at v5.12.0 · nodejs/node · GitHub

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#ifndef SRC_NODE_BUFFER_H_

#define SRC_NODE_BUFFER_H_

#include "node.h"

#include "v8.h"

namespace node {

extern bool zero_fill_all_buffers;

namespace Buffer {

static const unsigned int kMaxLength =

sizeof(int32_t) == sizeof(intptr_t) ? 0x3fffffff : 0x7fffffff;

NODE_EXTERN 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_

node/src/node_buffer.h at v5.12.0 · nodejs/node · GitHub

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node/src/node_buffer.h at v5.12.0 · nodejs/node · GitHub

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