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69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
#ifndef SRC_NODE_BUFFER_H_
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#define SRC_NODE_BUFFER_H_
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#include "node.h"
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#include "v8.h"
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namespace node {
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extern bool zero_fill_all_buffers;
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namespace Buffer {
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static const unsigned int kMaxLength =
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sizeof(int32_t) == sizeof(intptr_t) ? 0x3fffffff : 0x7fffffff;
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NODE_EXTERN typedef void (*FreeCallback)(char* data, void* hint);
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NODE_EXTERN bool HasInstance(v8::Local<v8::Value> val);
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NODE_EXTERN bool HasInstance(v8::Local<v8::Object> val);
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NODE_EXTERN char* Data(v8::Local<v8::Value> val);
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NODE_EXTERN char* Data(v8::Local<v8::Object> val);
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NODE_EXTERN size_t Length(v8::Local<v8::Value> val);
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NODE_EXTERN size_t Length(v8::Local<v8::Object> val);
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// public constructor - data is copied
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NODE_EXTERN v8::MaybeLocal<v8::Object> Copy(v8::Isolate* isolate,
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const char* data,
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size_t len);
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// public constructor
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NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate, size_t length);
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// public constructor from string
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NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate,
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v8::Local<v8::String> string,
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enum encoding enc = UTF8);
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// public constructor - data is used, callback is passed data on object gc
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NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate,
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char* data,
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size_t length,
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FreeCallback callback,
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void* hint);
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// public constructor - data is used.
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NODE_EXTERN v8::MaybeLocal<v8::Object> New(v8::Isolate* isolate,
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char* data,
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size_t len);
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// This is verbose to be explicit with inline commenting
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static inline bool IsWithinBounds(size_t off, size_t len, size_t max) {
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// Asking to seek too far into the buffer
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// check to avoid wrapping in subsequent subtraction
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if (off > max)
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return false;
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// Asking for more than is left over in the buffer
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if (max - off < len)
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return false;
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// Otherwise we're in bounds
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return true;
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}
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} // namespace Buffer
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} // namespace node
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#endif // SRC_NODE_BUFFER_H_
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