| static private ToInteger ( Object value ) : double | ||
| value | Object | |
| Результат | double | |
public static String toExponential(Object thisob, Object fractionDigits)
{
double value = NumberPrototype.ThisobToDouble(thisob);
double f;
if (fractionDigits == null || fractionDigits is Missing)
{
f = 16;
}
else
{
f = Convert.ToInteger(fractionDigits);
}
if (f < 0 || f > 20)
{
throw new JScriptException(JSError.FractionOutOfRange);
}
StringBuilder fmt = new StringBuilder("#.");
for (int i = 0; i < f; i++)
{
fmt.Append('0');
}
fmt.Append("e+0");
return(value.ToString(fmt.ToString(), CultureInfo.InvariantCulture));
}
internal bool test(String input)
{
Match match = null;
if (!this.globalInt)
{
match = this.regex.Match(input);
}
else
{
int lastIndex = (int)Convert.ToInteger(this.lastIndexInt);
if (lastIndex <= 0)
{
match = this.regex.Match(input);
}
else if (lastIndex <= input.Length)
{
match = this.regex.Match(input, lastIndex);
}
}
if (match == null || !match.Success)
{
this.lastIndexInt = 0;
return(false);
}
this.lastIndexInt = this.regExpConst.UpdateConstructor(this.regex, match, input);
return(true);
}
internal Object exec(String input)
{
Match match = null;
if (!this.globalInt)
{
match = this.regex.Match(input);
}
else
{
int lastIndex = (int)Convert.ToInteger(this.lastIndexInt);
if (lastIndex <= 0)
{
match = this.regex.Match(input);
}
else if (lastIndex <= input.Length)
{
match = this.regex.Match(input, lastIndex);
}
}
if (match == null || !match.Success)
{
this.lastIndexInt = 0;
return(DBNull.Value);
}
this.lastIndexInt = this.regExpConst.UpdateConstructor(this.regex, match, input);
return(new RegExpMatch(this.regExpConst.arrayPrototype, this.regex, match, input));
}
public static String toPrecision(Object thisob, Object precision)
{
double value = NumberPrototype.ThisobToDouble(thisob);
if (precision == null || precision is Missing)
{
return(Convert.ToString(value));
}
double df = Convert.ToInteger(precision);
if (df < 1 || df > 21)
{
throw new JScriptException(JSError.PrecisionOutOfRange);
}
int f = (int)df;
if (Double.IsNaN(value))
{
return("NaN");
}
if (Double.IsInfinity(value))
{
return(value > 0.0 ? "Infinity" : "-Infinity");
}
String sign;
if (value >= 0.0)
{
sign = "";
}
else
{
sign = "-";
value = -value;
}
String mant = value.ToString("e" + (f - 1).ToString(), CultureInfo.InvariantCulture);
int exp = Int32.Parse(mant.Substring(mant.Length - 4), CultureInfo.InvariantCulture);
mant = mant.Substring(0, 1) + mant.Substring(2, f - 1);
if (exp >= f || exp < -6)
{
return(sign + mant.Substring(0, 1) + (f > 1 ? "." + mant.Substring(1) : "")
+ (exp >= 0 ? "e+" : "e") + exp.ToString());
}
if (exp == f - 1)
{
return(sign + mant);
}
if (exp >= 0)
{
return(sign + mant.Substring(0, exp + 1) + "." + mant.Substring(exp + 1));
}
return(sign + "0." + mant.PadLeft(f - exp - 1, '0'));
}
public static Object charCodeAt(Object thisob, double pos) //This returns an object so that integers stay integers
{
String thisStr = Convert.ToString(thisob);
double position = Convert.ToInteger(pos);
if (position < 0 || !(position < thisStr.Length))
{
return(Double.NaN);
}
return((int)(thisStr[(int)position]));
}
public static String charAt(Object thisob, double pos)
{
String thisStr = Convert.ToString(thisob);
double position = Convert.ToInteger(pos);
if (position < 0 || !(position < thisStr.Length))
{
return("");
}
return(thisStr.Substring((int)position, 1));
}
public static ArrayObject slice(Object thisob, VsaEngine engine, double start, Object end)
{
ArrayObject array = engine.GetOriginalArrayConstructor().Construct();
uint length = Convert.ToUint32(LateBinding.GetMemberValue(thisob, "length"));
// compute the start index
long startIndex = Runtime.DoubleToInt64(Convert.ToInteger(start));
if (startIndex < 0)
{
startIndex = length + startIndex;
if (startIndex < 0)
{
startIndex = 0;
}
}
else if (startIndex > length)
{
startIndex = length;
}
// compute the end index
long endIndex = length;
if (end != null && !(end is Missing))
{
endIndex = Runtime.DoubleToInt64(Convert.ToInteger(end));
if (endIndex < 0)
{
endIndex = length + endIndex;
if (endIndex < 0)
{
endIndex = 0;
}
}
else if (endIndex > length)
{
endIndex = length;
}
}
// slice
if (endIndex > startIndex)
{
array.length = endIndex - startIndex;
for (ulong i = (ulong)startIndex, j = 0; i < (ulong)endIndex; i++, j++)
{
Object val = LateBinding.GetValueAtIndex(thisob, i);
if (!(val is Missing))
{
LateBinding.SetValueAtIndex(array, j, val);
}
}
}
return(array);
}
public static int indexOf(Object thisob, Object searchString, double position)
{
String thisStr = Convert.ToString(thisob);
String searchStr = Convert.ToString(searchString);
double startIndex = Convert.ToInteger(position);
int length = thisStr.Length;
if (startIndex < 0)
{
startIndex = 0;
}
if (startIndex >= length)
{
return(searchStr.Length == 0 ? 0 : -1);
}
return(thisStr.IndexOf(searchStr, (int)startIndex));
}
public static String slice(Object thisob, double start, Object end)
{
String thisStr = Convert.ToString(thisob);
int length = thisStr.Length;
double startIndex = Convert.ToInteger(start);
double endIndex = (end == null || end is Missing)
? length : Convert.ToInteger(end);
if (startIndex < 0)
{
startIndex = length + startIndex;
if (startIndex < 0)
{
startIndex = 0;
}
}
else
if (startIndex > length)
{
startIndex = length;
}
if (endIndex < 0)
{
endIndex = length + endIndex;
if (endIndex < 0)
{
endIndex = 0;
}
}
else
if (endIndex > length)
{
endIndex = length;
}
int nChars = (int)(endIndex - startIndex);
if (nChars <= 0)
{
return("");
}
else
{
return(thisStr.Substring((int)startIndex, nChars));
}
}
public static String substr(Object thisob, double start, Object count)
{
String thisStr = thisob as String;
if (thisStr == null)
{
thisStr = Convert.ToString(thisob);
}
int length = thisStr.Length;
double startIndex = Convert.ToInteger(start);
if (startIndex < 0)
{
startIndex += length;
}
if (startIndex < 0)
{
startIndex = 0;
}
else if (startIndex > length)
{
startIndex = length;
}
int nChars = count is int?(int)count:
((count == null || count is Missing) ? length - (int)startIndex : (int)Convert.ToInteger(count));
if (startIndex + nChars > length)
{
nChars = length - (int)startIndex;
}
if (nChars <= 0)
{
return("");
}
else
{
return(thisStr.Substring((int)startIndex, nChars));
}
}
public static String substring(Object thisob, double start, Object end)
{
String thisStr = thisob as String;
if (thisStr == null)
{
thisStr = Convert.ToString(thisob);
}
int length = thisStr.Length;
double startIndex = Convert.ToInteger(start);
if (startIndex < 0)
{
startIndex = 0;
}
else if (startIndex > length)
{
startIndex = length;
}
double endIndex = (end == null || end is Missing)
? length : Convert.ToInteger(end);
if (endIndex < 0)
{
endIndex = 0;
}
else if (endIndex > length)
{
endIndex = length;
}
if (startIndex > endIndex)
{
double temp = startIndex;
startIndex = endIndex;
endIndex = temp;
}
return(thisStr.Substring((int)startIndex, (int)(endIndex - startIndex)));
}
public static ArrayObject split(Object thisob, VsaEngine engine, Object separator, Object limit)
{
String thisStr = Convert.ToString(thisob);
uint limitValue = UInt32.MaxValue;
if (limit != null && !(limit is Missing) && limit != DBNull.Value)
{
double lmt = Convert.ToInteger(limit);
if (lmt >= 0 && lmt < UInt32.MaxValue)
{
limitValue = (uint)lmt;
}
}
if (limitValue == 0)
{
return((ArrayObject)engine.GetOriginalArrayConstructor().Construct());
}
if (separator == null || separator is Missing)
{
ArrayObject array = (ArrayObject)engine.GetOriginalArrayConstructor().Construct();
array.SetValueAtIndex(0, thisob);
return(array);
}
RegExpObject regExpObject = separator as RegExpObject;
if (regExpObject != null)
{
return(StringPrototype.SplitWithRegExp(thisStr, engine, regExpObject, limitValue));
}
Regex regex = separator as Regex;
if (regex != null)
{
return(StringPrototype.SplitWithRegExp(thisStr, engine, new RegExpObject(regex), limitValue));
}
return(StringPrototype.SplitWithString(thisStr, engine, Convert.ToString(separator), limitValue));
}
public static ArrayObject splice(Object thisob, VsaEngine engine, double start, double deleteCnt, params Object[] args)
{
uint oldLength = Convert.ToUint32(LateBinding.GetMemberValue(thisob, "length"));
// compute the start index
long startIndex = Runtime.DoubleToInt64(Convert.ToInteger(start));
if (startIndex < 0)
{
startIndex = oldLength + startIndex;
if (startIndex < 0)
{
startIndex = 0;
}
}
else if (startIndex > oldLength)
{
startIndex = oldLength;
}
// compute the number of items to delete
long deleteCount = Runtime.DoubleToInt64(Convert.ToInteger(deleteCnt));
if (deleteCount < 0)
{
deleteCount = 0;
}
else if (deleteCount > oldLength - startIndex)
{
deleteCount = oldLength - startIndex;
}
long newLength = oldLength + args.Length - deleteCount;
// create an array for the result
ArrayObject result = engine.GetOriginalArrayConstructor().Construct();
result.length = deleteCount;
// special case array objects (nice speedup if dense)
if (thisob is ArrayObject)
{
((ArrayObject)thisob).Splice((uint)startIndex, (uint)deleteCount, args, result, (uint)oldLength, (uint)newLength);
return(result);
}
// copy the deleted items to the result array
for (ulong i = 0; i < (ulong)deleteCount; i++)
{
result.SetValueAtIndex((uint)i, LateBinding.GetValueAtIndex(thisob, i + (ulong)startIndex));
}
// shift the remaining elements left or right
long n = oldLength - startIndex - deleteCount;
if (newLength < oldLength)
{
for (long i = 0; i < n; i++)
{
LateBinding.SetValueAtIndex(thisob, (ulong)(i + startIndex + args.Length), LateBinding.GetValueAtIndex(thisob, (ulong)(i + startIndex + deleteCount)));
}
LateBinding.SetMemberValue(thisob, "length", newLength);
}
else
{
LateBinding.SetMemberValue(thisob, "length", newLength);
for (long i = n - 1; i >= 0; i--)
{
LateBinding.SetValueAtIndex(thisob, (ulong)(i + startIndex + args.Length), LateBinding.GetValueAtIndex(thisob, (ulong)(i + startIndex + deleteCount)));
}
}
// splice in the arguments
int m = args == null ? 0 : args.Length;
for (uint i = 0; i < m; i++)
{
LateBinding.SetValueAtIndex(thisob, i + (ulong)startIndex, args[i]);
}
return(result);
}
