#include "config.h"
#include "JSValue.h"
+#include "BooleanConstructor.h"
+#include "BooleanPrototype.h"
+#include "Error.h"
+#include "ExceptionHelpers.h"
+#include "JSGlobalObject.h"
#include "JSFunction.h"
+#include "JSNotAnObject.h"
+#include "NumberObject.h"
#include <wtf/MathExtras.h>
+#include <wtf/StringExtras.h>
namespace JSC {
static const double D32 = 4294967296.0;
// ECMA 9.4
-double JSValuePtr::toInteger(ExecState* exec) const
+double JSValue::toInteger(ExecState* exec) const
{
- if (isInt32Fast())
- return getInt32Fast();
+ if (isInt32())
+ return asInt32();
double d = toNumber(exec);
return isnan(d) ? 0.0 : trunc(d);
}
-double JSValuePtr::toIntegerPreserveNaN(ExecState* exec) const
+double JSValue::toIntegerPreserveNaN(ExecState* exec) const
{
- if (isInt32Fast())
- return getInt32Fast();
+ if (isInt32())
+ return asInt32();
return trunc(toNumber(exec));
}
-int32_t toInt32SlowCase(double d, bool& ok)
+JSObject* JSValue::toObjectSlowCase(ExecState* exec, JSGlobalObject* globalObject) const
{
- ok = true;
+ ASSERT(!isCell());
- if (d >= -D32 / 2 && d < D32 / 2)
- return static_cast<int32_t>(d);
+ if (isInt32() || isDouble())
+ return constructNumber(exec, globalObject, asValue());
+ if (isTrue() || isFalse())
+ return constructBooleanFromImmediateBoolean(exec, globalObject, asValue());
- if (isnan(d) || isinf(d)) {
- ok = false;
- return 0;
- }
+ ASSERT(isUndefinedOrNull());
+ throwError(exec, createNotAnObjectError(exec, *this));
+ return new (exec) JSNotAnObject(exec);
+}
+
+JSObject* JSValue::toThisObjectSlowCase(ExecState* exec) const
+{
+ ASSERT(!isCell());
+
+ if (isInt32() || isDouble())
+ return constructNumber(exec, exec->lexicalGlobalObject(), asValue());
+ if (isTrue() || isFalse())
+ return constructBooleanFromImmediateBoolean(exec, exec->lexicalGlobalObject(), asValue());
+ ASSERT(isUndefinedOrNull());
+ return exec->globalThisValue();
+}
+
+JSObject* JSValue::synthesizeObject(ExecState* exec) const
+{
+ ASSERT(!isCell());
+ if (isNumber())
+ return constructNumber(exec, exec->lexicalGlobalObject(), asValue());
+ if (isBoolean())
+ return constructBooleanFromImmediateBoolean(exec, exec->lexicalGlobalObject(), asValue());
+
+ ASSERT(isUndefinedOrNull());
+ throwError(exec, createNotAnObjectError(exec, *this));
+ return new (exec) JSNotAnObject(exec);
+}
+
+JSObject* JSValue::synthesizePrototype(ExecState* exec) const
+{
+ ASSERT(!isCell());
+ if (isNumber())
+ return exec->lexicalGlobalObject()->numberPrototype();
+ if (isBoolean())
+ return exec->lexicalGlobalObject()->booleanPrototype();
- double d32 = fmod(trunc(d), D32);
- if (d32 >= D32 / 2)
- d32 -= D32;
- else if (d32 < -D32 / 2)
- d32 += D32;
- return static_cast<int32_t>(d32);
+ ASSERT(isUndefinedOrNull());
+ throwError(exec, createNotAnObjectError(exec, *this));
+ return new (exec) JSNotAnObject(exec);
}
-uint32_t toUInt32SlowCase(double d, bool& ok)
+#ifndef NDEBUG
+char* JSValue::description()
{
- ok = true;
+ static const size_t size = 32;
+ static char description[size];
- if (d >= 0.0 && d < D32)
- return static_cast<uint32_t>(d);
+ if (!*this)
+ snprintf(description, size, "<JSValue()>");
+ else if (isInt32())
+ snprintf(description, size, "Int32: %d", asInt32());
+ else if (isDouble())
+ snprintf(description, size, "Double: %lf", asDouble());
+ else if (isCell())
+ snprintf(description, size, "Cell: %p", asCell());
+ else if (isTrue())
+ snprintf(description, size, "True");
+ else if (isFalse())
+ snprintf(description, size, "False");
+ else if (isNull())
+ snprintf(description, size, "Null");
+ else if (isUndefined())
+ snprintf(description, size, "Undefined");
+ else
+ snprintf(description, size, "INVALID");
- if (isnan(d) || isinf(d)) {
- ok = false;
+ return description;
+}
+#endif
+
+// This in the ToInt32 operation is defined in section 9.5 of the ECMA-262 spec.
+// Note that this operation is identical to ToUInt32 other than to interpretation
+// of the resulting bit-pattern (as such this metod is also called to implement
+// ToUInt32).
+//
+// The operation can be descibed as round towards zero, then select the 32 least
+// bits of the resulting value in 2s-complement representation.
+int32_t toInt32(double number)
+{
+ int64_t bits = WTF::bitwise_cast<int64_t>(number);
+ int32_t exp = (static_cast<int32_t>(bits >> 52) & 0x7ff) - 0x3ff;
+
+ // If exponent < 0 there will be no bits to the left of the decimal point
+ // after rounding; if the exponent is > 83 then no bits of precision can be
+ // left in the low 32-bit range of the result (IEEE-754 doubles have 52 bits
+ // of fractional precision).
+ // Note this case handles 0, -0, and all infinte, NaN, & denormal value.
+ if (exp < 0 || exp > 83)
return 0;
+
+ // Select the appropriate 32-bits from the floating point mantissa. If the
+ // exponent is 52 then the bits we need to select are already aligned to the
+ // lowest bits of the 64-bit integer representation of tghe number, no need
+ // to shift. If the exponent is greater than 52 we need to shift the value
+ // left by (exp - 52), if the value is less than 52 we need to shift right
+ // accordingly.
+ int32_t result = (exp > 52)
+ ? static_cast<int32_t>(bits << (exp - 52))
+ : static_cast<int32_t>(bits >> (52 - exp));
+
+ // IEEE-754 double precision values are stored omitting an implicit 1 before
+ // the decimal point; we need to reinsert this now. We may also the shifted
+ // invalid bits into the result that are not a part of the mantissa (the sign
+ // and exponent bits from the floatingpoint representation); mask these out.
+ if (exp < 32) {
+ int32_t missingOne = 1 << exp;
+ result &= missingOne - 1;
+ result += missingOne;
}
- double d32 = fmod(trunc(d), D32);
- if (d32 < 0)
- d32 += D32;
- return static_cast<uint32_t>(d32);
+ // If the input value was negative (we could test either 'number' or 'bits',
+ // but testing 'bits' is likely faster) invert the result appropriately.
+ return bits < 0 ? -result : result;
+}
+
+NEVER_INLINE double nonInlineNaN()
+{
+#if OS(SYMBIAN)
+ return nanval();
+#else
+ return std::numeric_limits<double>::quiet_NaN();
+#endif
+}
+
+bool JSValue::isValidCallee()
+{
+ return asObject(asObject(asCell())->getAnonymousValue(0))->isGlobalObject();
}
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff