txInteger fxToInteger(txMachine* the, txSlot* theSlot)
{
#if mxOptimize
if (XS_INTEGER_KIND == theSlot->kind)
return theSlot->value.integer; // this is the case over 90% of the time, so avoid the switch
#endif
again:
switch (theSlot->kind) {
case XS_UNDEFINED_KIND:
case XS_NULL_KIND:
theSlot->kind = XS_INTEGER_KIND;
theSlot->value.integer = 0;
break;
case XS_BOOLEAN_KIND:
theSlot->kind = XS_INTEGER_KIND;
if (theSlot->value.boolean == 0)
theSlot->value.integer = 0;
else
theSlot->value.integer = 1;
break;
case XS_INTEGER_KIND:
break;
case XS_NUMBER_KIND:
theSlot->kind = XS_INTEGER_KIND;
switch (c_fpclassify(theSlot->value.number)) {
case C_FP_INFINITE:
case C_FP_NAN:
case C_FP_ZERO:
theSlot->value.integer = 0;
break;
default: {
#define MODULO 4294967296.0
txNumber aNumber = c_fmod(c_trunc(theSlot->value.number), MODULO);
if (aNumber >= MODULO / 2)
aNumber -= MODULO;
else if (aNumber < -MODULO / 2)
aNumber += MODULO;
theSlot->value.integer = (txInteger)aNumber;
} break;
}
break;
case XS_STRING_KIND:
case XS_STRING_X_KIND:
theSlot->kind = XS_NUMBER_KIND;
theSlot->value.number = fxStringToNumber(the->dtoa, theSlot->value.string, 1);
goto again;
case XS_SYMBOL_KIND:
mxTypeError("Cannot coerce symbol to integer");
break;
case XS_REFERENCE_KIND:
fxToPrimitive(the, theSlot, XS_NUMBER_HINT);
goto again;
default:
mxTypeError("Cannot coerce to integer");
break;
}
return theSlot->value.integer;
}
txIndex fxArgToArrayLimit(txMachine* the, txInteger argi)
{
if (mxArgc > argi) {
txNumber i = c_trunc(fxToNumber(the, mxArgv(argi)));
if (c_isnan(i))
i = 0;
else if (i < 0)
i = 0;
else if (i > XS_MAX_INDEX)
i = XS_MAX_INDEX;
return (txIndex)i;
}
return XS_MAX_INDEX;
}
void fx_Number_isInteger(txMachine* the)
{
int fpclass;
txSlot* slot = (mxArgc < 1) ? C_NULL : fxCheckNumber(the, mxArgv(0));
mxResult->kind = XS_BOOLEAN_KIND;
mxResult->value.boolean = 0;
if (slot) {
fpclass = c_fpclassify(slot->value.number);
if ((fpclass != FP_NAN) && (fpclass != FP_INFINITE)) {
txNumber check = c_trunc(slot->value.number);
if (slot->value.number == check)
mxResult->value.boolean = 1;
}
}
}
txIndex fxArgToIndex(txMachine* the, txInteger argi, txIndex index, txIndex length)
{
if (mxArgc > argi) {
txNumber c = length;
txNumber i = c_trunc(fxToNumber(the, mxArgv(argi)));
if (c_isnan(i))
i = 0;
if (i < 0) {
i = c + i;
if (i < 0)
i = 0;
}
else if (i > c)
i = c;
index = (txIndex)i;
}
return index;
}
void fx_Date_prototype_setTime(txMachine* the)
{
txSlot* slot = fxCheckDate(the, mxThis);
if (!slot) mxTypeError("this is no date");
if (mxArgc < 1)
slot->value.number = C_NAN;
else {
txNumber number = fxToNumber(the, mxArgv(0));
int fpclass = c_fpclassify(number);
if (fpclass != FP_NAN) {
if (c_fabs(number) > 8.64e15)
number = C_NAN;
else
number = c_trunc(number);
}
slot->value.number = number;
}
mxResult->value.number = slot->value.number;
mxResult->kind = XS_NUMBER_KIND;
}
void fx_Date_prototype_set_aux(txMachine* the, txTimeDescription* td, txSlot* slot)
{
c_time_t time;
txNumber number;
td->tm.tm_isdst = -1;
time = c_mktime(&(td->tm));
if (time == -1)
number = C_NAN;
else {
number = (time * 1000.0) + td->ms;
if (c_fpclassify(number) != FP_NAN) {
if (c_fabs(number) > 8.64e15)
number = C_NAN;
else
number = c_trunc(number);
}
}
mxResult->value.number = number;
mxResult->kind = XS_NUMBER_KIND;
slot->value.number = number;
}
txUnsigned fxToUnsigned(txMachine* the, txSlot* theSlot)
{
txUnsigned result;
again:
switch (theSlot->kind) {
case XS_UNDEFINED_KIND:
case XS_NULL_KIND:
theSlot->kind = XS_INTEGER_KIND;
result = theSlot->value.integer = 0;
break;
case XS_BOOLEAN_KIND:
theSlot->kind = XS_INTEGER_KIND;
if (theSlot->value.boolean == 0)
result = theSlot->value.integer = 0;
else
result = theSlot->value.integer = 1;
break;
case XS_INTEGER_KIND:
if (theSlot->value.integer >= 0)
return (txUnsigned)theSlot->value.integer;
theSlot->kind = XS_NUMBER_KIND;
theSlot->value.number = theSlot->value.integer;
// continue
case XS_NUMBER_KIND:
theSlot->kind = XS_INTEGER_KIND;
switch (c_fpclassify(theSlot->value.number)) {
case C_FP_INFINITE:
case C_FP_NAN:
case C_FP_ZERO:
result = theSlot->value.integer = 0;
break;
default: {
#define MODULO 4294967296.0
txNumber aNumber = c_fmod(c_trunc(theSlot->value.number), MODULO);
if (aNumber < 0)
aNumber += MODULO;
result = (txUnsigned)aNumber;
if (((txInteger)result) >= 0) {
theSlot->kind = XS_INTEGER_KIND;
theSlot->value.integer = (txInteger)result;
}
else {
theSlot->kind = XS_NUMBER_KIND;
theSlot->value.number = aNumber;
}
} break;
}
break;
case XS_STRING_KIND:
case XS_STRING_X_KIND:
theSlot->kind = XS_NUMBER_KIND;
theSlot->value.number = fxStringToNumber(the->dtoa, theSlot->value.string, 1);
goto again;
case XS_SYMBOL_KIND:
result = 0;
mxTypeError("Cannot coerce symbol to unsigned");
break;
case XS_REFERENCE_KIND:
fxToPrimitive(the, theSlot, XS_NUMBER_HINT);
goto again;
default:
result = 0;
mxTypeError("Cannot coerce to unsigned");
break;
}
return result;
}