public static UString Find(this string str, UString what, bool ignoreCase = false)
{
return(((UString)str).Find(what, ignoreCase));
}
/// <summary>Called by Format to replace named placeholders with numeric
/// placeholders in format strings.</summary>
/// <returns>A format string that can be used to call string.Format.</returns>
/// <seealso cref="FormatCore"/>
public static string EliminateNamedArgs(string format, params object[] args)
{
char c;
bool containsNames = false;
int highestIndex = -1;
for (int i = 0; i < format.Length - 1; i++)
{
if (format[i] == '{' && format[i + 1] != '{')
{
int j = ++i;
for (; (c = format[i]) >= '0' && c <= '9'; i++)
{
}
if (i == j)
{
containsNames = true;
}
else
{
highestIndex = int.Parse(format.Substring(j, i - j));
}
}
}
if (!containsNames)
{
return(format);
}
if (((args.Length - highestIndex) & 1) == 0)
{
highestIndex++; // so that the number of args left is even
}
StringBuilder sb = new StringBuilder(format);
int correction = 0;
for (int i = 0; i < sb.Length - 1; i++)
{
if (sb[i] == '{' && sb[i + 1] != '{')
{
int placeholderStart = ++i; // Placeholder name starts here.
for (; (c = sb[i]) != '}' && c != ':' && c != ','; i++)
{
}
int placeholderLen = i - placeholderStart;
// StringBuilder lacks Substring()! Instead, get the name
// from the original string and keep track of a correction
// factor so that in subsequent iterations, we get the
// substring from the right position in the original string.
UString name = format.Slice(placeholderStart + correction, placeholderLen);
for (int arg = highestIndex + 1; arg < args.Length; arg += 2)
{
if (args[arg] != null && name.Equals(args[arg] as string, ignoreCase: true))
{
// Matching argument found. Replace name with index:
string idxStr = (arg + 1).ToString();
sb.Remove(placeholderStart, placeholderLen);
sb.Insert(placeholderStart, idxStr);
int dif = placeholderLen - idxStr.Length;
correction += dif;
i -= dif;
break;
}
}
}
Debug.Assert(sb[i] == format[i + correction]);
}
return(sb.ToString());
}
/// <summary>Low-level method that identifies the parts of a float literal
/// of arbitrary base (typically base 2, 10, or 16) with no prefix or
/// suffix, such as <c>2.Cp0</c> (which means 2.75 in base 16).</summary>
/// <param name="radix">Base of the number to parse; must be between 2
/// and 36.</param>
/// <param name="mantissa">Integer magnitude of the number.</param>
/// <param name="exponentBase2">Base-2 exponent to apply, as specified by
/// the 'p' suffix, or 0 if there is no 'p' suffix..</param>
/// <param name="exponentBase10">Base-10 exponent to apply, as specified by
/// the 'e' suffix, or 0 if there is no 'e' suffix..</param>
/// <param name="exponentBaseR">Base-radix exponent to apply. This number
/// is based on the front part of the number only (not including the 'p' or
/// 'e' suffix). Negative values represent digits after the decimal point,
/// while positive numbers represent 64-bit overflow. For example, if the
/// input is <c>12.3456</c> with <c>radix=10</c>, the output will be
/// <c>mantissa=123456</c> and <c>exponentBaseR=-4</c>. If the input is
/// <c>0123_4567_89AB_CDEF_1234.5678</c> with <c>radix=16</c>, the mantissa
/// overflows, and the result is <c>mantissa = 0x1234_5678_9ABC_DEF1</c>
/// with <c>exponentBaseR=3</c>.</param>
/// <param name="numDigits">Set to the number of digits in the number, not
/// including the exponent part.</param>
/// <param name="flags">Alters parsing behavior, see <see cref="ParseFlags"/>.</param>
/// <remarks>
/// The syntax required is
/// <code>
/// ( '+'|'-' )?
/// ( Digits ('.' Digits?)? | '.' Digits )
/// ( ('p'|'P') ('-'|'+')? DecimalDigits+ )?
/// ( ('e'|'E') ('-'|'+')? DecimalDigits+ )?
/// </code>
/// where Digits refers to one digits in the requested base, possibly
/// including underscores or spaces if the flags allow it; similarly,
/// DecimalDigits refers to base-10 digits and is also affected by the
/// flags.
/// <para/>
/// Returns false if there was an error interpreting the input.
/// <para/>
/// To keep the parser relatively simple, it does not roll back in case of
/// error the way the int parser does. For example, given the input "23p",
/// the 'p' is consumed and causes the method to return false, even though
/// the parse could have been successful if it had ignored the 'p'.
/// </remarks>
public static bool TryParseFloatParts(ref UString source, int radix, out bool negative, out ulong mantissa, out int exponentBaseR, out int exponentBase2, out int exponentBase10, out int numDigits, ParseFlag flags = 0)
{
flags |= G.ParseFlag.StopBeforeOverflow;
if ((flags & ParseFlag.SkipSpacesInFront) != 0)
{
source = SkipSpaces(source);
}
negative = false;
char c = source[0, '\0'];
if (c == '-' || c == '+')
{
negative = c == '-';
source = source.Slice(1);
}
int numDigits2 = 0;
mantissa = 0;
exponentBase2 = 0;
exponentBase10 = 0;
exponentBaseR = 0;
bool success = TryParseUInt(ref source, ref mantissa, radix, flags, out numDigits);
if (!success) // possible overflow, extra digits remain if so
{
numDigits += (exponentBaseR = SkipExtraDigits(ref source, radix, flags));
}
c = source[0, '\0'];
if (c == '.' || (c == ',' && (flags & ParseFlag.AllowCommaDecimalPoint) != 0))
{
source = source.Slice(1);
if (exponentBaseR == 0)
{
success = TryParseUInt(ref source, ref mantissa, radix, flags, out numDigits2);
if ((numDigits += numDigits2) == 0)
{
return(false);
}
exponentBaseR = -numDigits2;
}
else
{
Debug.Assert(!success);
}
if (!success) // possible overflow, extra digits remain if so
{
numDigits += SkipExtraDigits(ref source, radix, flags);
}
c = source[0, '\0'];
}
if (numDigits == 0)
{
return(false);
}
success = true;
if (c == 'p' || c == 'P')
{
source = source.Slice(1);
success = TryParseInt(ref source, out exponentBase2, 10, flags) && success;
c = source[0, '\0'];
}
if (c == 'e' || c == 'E')
{
source = source.Slice(1);
success = TryParseInt(ref source, out exponentBase10, 10, flags) && success;
}
return(success);
}
public static string EscapeCStyle(UString s, EscapeC flags = EscapeC.Default)
{
return(EscapeCStyle(s, flags, '\0'));
}
public static bool TryParseHex(UString s, out int value)
{
int count = TryParseHex(ref s, out value);
return(count > 0 && s.IsEmpty);
}
public UString ReplaceOne(UString what, UString replacement, bool ignoreCase = false)
{
return(Replace(what, replacement, ignoreCase, 1));
}
public bool Equals(UString other)
{
return(Equals(other, false));
}