本文整理汇总了C++中js::HandleValue::toNumber方法的典型用法代码示例。如果您正苦于以下问题：C++ HandleValue::toNumber方法的具体用法？C++ HandleValue::toNumber怎么用？C++ HandleValue::toNumber使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类js::HandleValue的用法示例。
在下文中一共展示了HandleValue::toNumber方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: js_to_number
bool js_to_number(JSContext *cx, JS::HandleValue v, double *dp) {
if (v.isNumber()) {
*dp = v.toNumber();
return true;
} else {
*dp = 0;
return false;
}
}示例2: HandleScriptVal
//.........这里部分代码省略.........
JS::Rooted<JSPropertyDescriptor> desc(cx);
if (!JS_GetPropertyDescriptorById(cx, obj, id, &desc))
throw PSERROR_Serialize_ScriptError("JS_GetPropertyDescriptorById failed");
if (desc.hasGetterObject())
throw PSERROR_Serialize_ScriptError("Cannot serialize property getters");
// Get the property name as a string
if (!JS_IdToValue(cx, id, &idval))
throw PSERROR_Serialize_ScriptError("JS_IdToValue failed");
JS::RootedString idstr(cx, JS::ToString(cx, idval));
if (!idstr)
throw PSERROR_Serialize_ScriptError("JS_ValueToString failed");
ScriptString("prop name", idstr);
if (!JS_GetPropertyById(cx, obj, id, &propval))
throw PSERROR_Serialize_ScriptError("JS_GetPropertyById failed");
HandleScriptVal(propval);
}
break;
}
case JSTYPE_FUNCTION:
{
// We can't serialise functions, but we can at least name the offender (hopefully)
std::wstring funcname(L"(unnamed)");
JS::RootedFunction func(cx, JS_ValueToFunction(cx, val));
if (func)
{
JS::RootedString string(cx, JS_GetFunctionId(func));
if (string)
{
if (JS_StringHasLatin1Chars(string))
{
size_t length;
JS::AutoCheckCannotGC nogc;
const JS::Latin1Char* ch = JS_GetLatin1StringCharsAndLength(cx, nogc, string, &length);
if (ch && length > 0)
funcname.assign(ch, ch + length);
}
else
{
size_t length;
JS::AutoCheckCannotGC nogc;
const char16_t* ch = JS_GetTwoByteStringCharsAndLength(cx, nogc, string, &length);
if (ch && length > 0)
funcname.assign(ch, ch + length);
}
}
}
LOGERROR("Cannot serialise JS objects of type 'function': %s", utf8_from_wstring(funcname));
throw PSERROR_Serialize_InvalidScriptValue();
}
case JSTYPE_STRING:
{
m_Serializer.NumberU8_Unbounded("type", SCRIPT_TYPE_STRING);
JS::RootedString stringVal(cx, val.toString());
ScriptString("string", stringVal);
break;
}
case JSTYPE_NUMBER:
{
// To reduce the size of the serialized data, we handle integers and doubles separately.
// We can't check for val.isInt32 and val.isDouble directly, because integer numbers are not guaranteed
// to be represented as integers. A number like 33 could be stored as integer on the computer of one player
// and as double on the other player's computer. That would cause out of sync errors in multiplayer games because
// their binary representation and thus the hash would be different.
double d;
d = val.toNumber();
i32 integer;
if (JS_DoubleIsInt32(d, &integer))
{
m_Serializer.NumberU8_Unbounded("type", SCRIPT_TYPE_INT);
m_Serializer.NumberI32_Unbounded("value", integer);
}
else
{
m_Serializer.NumberU8_Unbounded("type", SCRIPT_TYPE_DOUBLE);
m_Serializer.NumberDouble_Unbounded("value", d);
}
break;
}
case JSTYPE_BOOLEAN:
{
m_Serializer.NumberU8_Unbounded("type", SCRIPT_TYPE_BOOLEAN);
bool b = val.toBoolean();
m_Serializer.NumberU8_Unbounded("value", b ? 1 : 0);
break;
}
default:
{
debug_warn(L"Invalid TypeOfValue");
throw PSERROR_Serialize_InvalidScriptValue();
}
}
}