/usr/include/mongo/scripting/v8_utils.h is in mongodb-dev 1:2.4.9-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | // v8_utils.h
/* Copyright 2009 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
#include <v8.h>
#include <mongo/base/string_data.h>
#include <mongo/util/assert_util.h>
namespace mongo {
#define jsassert(x,msg) uassert(16664, (msg), (x))
#define argumentCheck(mustBeTrue, errorMessage) \
if (!(mustBeTrue)) { \
return v8AssertionException((errorMessage)); \
}
std::ostream& operator<<(std::ostream& s, const v8::Handle<v8::Value>& o);
std::ostream& operator<<(std::ostream& s, const v8::Handle<v8::TryCatch>* try_catch);
/** Simple v8 object to string conversion helper */
std::string toSTLString(const v8::Handle<v8::Value>& o);
/** Like toSTLString but doesn't allocate a new std::string
*
* This owns the string's memory so you need to be careful not to let the
* converted StringDatas outlive the V8Scope object. These rules are the
* same as converting from a std::string into a StringData.
*
* Safe:
* void someFunction(StringData argument);
* v8::Handle<v8::String> aString;
*
* someFunction(V8String(aString)); // passing down stack as temporary
*
* V8String named (aString);
* someFunction(named); // passing up stack as named value
*
* StringData sd = named; // scope of sd is less than named
*
* Unsafe:
* StringData _member;
*
* StringData returningFunction() {
* StringData sd = V8String(aString); // sd outlives the temporary
*
* V8String named(aString)
* _member = named; // _member outlives named scope
*
* return V8String(aString); // passing up stack
* }
*/
class V8String {
public:
explicit V8String(const v8::Handle<v8::Value>& o) :_str(o) {
massert(16686, "error converting js type to Utf8Value", *_str);
}
operator StringData () const { return StringData(*_str, _str.length()); }
private:
v8::String::Utf8Value _str;
};
/** Get the properties of an object (and it's prototype) as a comma-delimited string */
std::string v8ObjectToString(const v8::Handle<v8::Object>& o);
class V8Scope;
void installFork(V8Scope* scope,
v8::Handle<v8::Object>& global,
v8::Handle<v8::Context>& context);
/** Throw a V8 exception from Mongo callback code; message text will be preceded by "Error: ".
* Note: this function should be used for text that did not originate from the JavaScript
* engine. Errors from the JavaScript engine will already have a prefix such as
* ReferenceError, TypeError or SyntaxError.
* Note: call only from a native function called from JavaScript (a callback).
* The V8 ThrowException routine will note a JavaScript exception that will be
* "thrown" in JavaScript when we return from the native function.
* Note: it's required to return immediately to V8's execution control without calling any
* V8 API functions. In this state, an empty handle may (will) be returned.
* @param errorMessage Error message text.
* @return Empty handle to be returned from callback function.
*/
v8::Handle<v8::Value> v8AssertionException(const char* errorMessage);
v8::Handle<v8::Value> v8AssertionException(const std::string& errorMessage);
}
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