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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_UTIL_H_
#define SRC_UTIL_H_
#include "v8.h"
#include <assert.h>
#include <stddef.h>
#include <stdlib.h>
namespace node {
#define FIXED_ONE_BYTE_STRING(isolate, string) \
(node::OneByteString((isolate), (string), sizeof(string) - 1))
#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
void operator=(const TypeName&) = delete; \
void operator=(TypeName&&) = delete; \
TypeName(const TypeName&) = delete; \
TypeName(TypeName&&) = delete
#if defined(NDEBUG)
# define ASSERT(expression)
# define CHECK(expression) \
do { \
if (!(expression)) abort(); \
} while (0)
#else
# define ASSERT(expression) assert(expression)
# define CHECK(expression) assert(expression)
#endif
#define CHECK_EQ(a, b) CHECK((a) == (b))
#define CHECK_GE(a, b) CHECK((a) >= (b))
#define CHECK_GT(a, b) CHECK((a) > (b))
#define CHECK_LE(a, b) CHECK((a) <= (b))
#define CHECK_LT(a, b) CHECK((a) < (b))
#define CHECK_NE(a, b) CHECK((a) != (b))
#define UNREACHABLE() abort()
// The helper is for doing safe downcasts from base types to derived types.
template <typename Inner, typename Outer>
class ContainerOfHelper {
public:
inline ContainerOfHelper(Inner Outer::*field, Inner* pointer);
template <typename TypeName>
inline operator TypeName*() const;
private:
Outer* const pointer_;
};
// Calculate the address of the outer (i.e. embedding) struct from
// the interior pointer to a data member.
template <typename Inner, typename Outer>
inline ContainerOfHelper<Inner, Outer> ContainerOf(Inner Outer::*field,
Inner* pointer);
// If persistent.IsWeak() == false, then do not call persistent.Reset()
// while the returned Local<T> is still in scope, it will destroy the
// reference to the object.
template <class TypeName>
inline v8::Local<TypeName> PersistentToLocal(
v8::Isolate* isolate,
const v8::Persistent<TypeName>& persistent);
// Unchecked conversion from a non-weak Persistent<T> to Local<TLocal<T>,
// use with care!
//
// Do not call persistent.Reset() while the returned Local<T> is still in
// scope, it will destroy the reference to the object.
template <class TypeName>
inline v8::Local<TypeName> StrongPersistentToLocal(
const v8::Persistent<TypeName>& persistent);
template <class TypeName>
inline v8::Local<TypeName> WeakPersistentToLocal(
v8::Isolate* isolate,
const v8::Persistent<TypeName>& persistent);
// Convenience wrapper around v8::String::NewFromOneByte().
inline v8::Local<v8::String> OneByteString(v8::Isolate* isolate,
const char* data,
int length = -1);
// For the people that compile with -funsigned-char.
inline v8::Local<v8::String> OneByteString(v8::Isolate* isolate,
const signed char* data,
int length = -1);
inline v8::Local<v8::String> OneByteString(v8::Isolate* isolate,
const unsigned char* data,
int length = -1);
inline void Wrap(v8::Local<v8::Object> object, void* pointer);
inline void ClearWrap(v8::Local<v8::Object> object);
template <typename TypeName>
inline TypeName* Unwrap(v8::Local<v8::Object> object);
class Utf8Value {
public:
explicit Utf8Value(v8::Handle<v8::Value> value);
~Utf8Value() {
free(str_);
}
char* operator*() {
return str_;
};
const char* operator*() const {
return str_;
};
size_t length() const {
return length_;
};
private:
size_t length_;
char* str_;
};
} // namespace node
#endif // SRC_UTIL_H_
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