| public TryMatchText ( string text, System.StringComparison comparisonType = StringComparison.OrdinalIgnoreCase ) : bool | ||
| text | string | The string that must match. Can not be null nor empty. |
| comparisonType | System.StringComparison | Specifies the culture, case, and sort rules. |
| return | bool | |
/// <summary>
/// Matches a JSON value: a "string", null, a number (double value), true or false.
/// Not error is set if match fails.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <param name="value">The parsed value. Can be null.</param>
/// <returns>True if a JSON value has been matched, false otherwise.</returns>
public static bool TryMatchJSONValue(this StringMatcher @this, out object value)
{
string s;
if (@this.TryMatchJSONQuotedString(out s, true))
{
value = s;
return(true);
}
double d;
if (@this.TryMatchDoubleValue(out d))
{
value = d;
return(true);
}
if (@this.TryMatchText("true"))
{
value = true;
return(true);
}
if (@this.TryMatchText("false"))
{
value = false;
return(true);
}
value = null;
return(false);
}
/// <summary>
/// Matches a JSON value: a "string", null, a number (double value), true or false.
/// This method ignores the actual value and does not set any error if match fails.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <returns>True if a JSON value has been matched, false otherwise.</returns>
public static bool TryMatchJSONTerminalValue(this StringMatcher @this)
{
return(@this.TryMatchJSONQuotedString(true) ||
@this.TryMatchDoubleValue() ||
@this.TryMatchText("true") ||
@this.TryMatchText("false"));
}
/// <summary>
/// Matches a quoted string without extracting its content.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <param name="allowNull">True to allow 'null'.</param>
/// <returns><c>true</c> when matched, <c>false</c> otherwise.</returns>
public static bool TryMatchJSONQuotedString(this StringMatcher @this, bool allowNull = false)
{
if (@this.IsEnd)
{
return(false);
}
int i = @this.StartIndex;
if (@this.Text[i++] != '"')
{
return(allowNull && @this.TryMatchText("null"));
}
int len = @this.Length - 1;
while (len >= 0)
{
if (len == 0)
{
return(false);
}
char c = @this.Text[i++];
--len;
if (c == '"')
{
break;
}
if (c == '\\')
{
i++;
--len;
}
}
return(@this.UncheckedMove(i - @this.StartIndex));
}
/// <summary>
/// Matches a JSON quoted string without setting an error if match fails.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <param name="content">Extracted content.</param>
/// <param name="allowNull">True to allow 'null'.</param>
/// <returns><c>true</c> when matched, <c>false</c> otherwise.</returns>
public static bool TryMatchJSONQuotedString(this StringMatcher @this, out string content, bool allowNull = false)
{
content = null;
if (@this.IsEnd)
{
return(false);
}
int i = @this.StartIndex;
if (@this.Text[i++] != '"')
{
return(allowNull && @this.TryMatchText("null"));
}
int len = @this.Length - 1;
StringBuilder b = null;
while (len >= 0)
{
if (len == 0)
{
return(false);
}
char c = @this.Text[i++];
--len;
if (c == '"')
{
break;
}
if (c == '\\')
{
if (len == 0)
{
return(false);
}
if (b == null)
{
b = new StringBuilder(@this.Text, @this.StartIndex + 1, i - @this.StartIndex - 2, 1024);
}
switch ((c = @this.Text[i++]))
{
case 'r': c = '\r'; break;
case 'n': c = '\n'; break;
case 'b': c = '\b'; break;
case 't': c = '\t'; break;
case 'f': c = '\f'; break;
case 'u':
{
if (--len == 0)
{
return(false);
}
int cN;
cN = ReadHexDigit(@this.Text[i++]);
if (cN < 0 || cN > 15)
{
return(false);
}
int val = cN << 12;
if (--len == 0)
{
return(false);
}
cN = ReadHexDigit(@this.Text[i++]);
if (cN < 0 || cN > 15)
{
return(false);
}
val |= cN << 8;
if (--len == 0)
{
return(false);
}
cN = ReadHexDigit(@this.Text[i++]);
if (cN < 0 || cN > 15)
{
return(false);
}
val |= cN << 4;
if (--len == 0)
{
return(false);
}
cN = ReadHexDigit(@this.Text[i++]);
if (cN < 0 || cN > 15)
{
return(false);
}
val |= cN;
c = (char)val;
break;
}
}
}
if (b != null)
{
b.Append(c);
}
}
int lenS = i - @this.StartIndex;
if (b != null)
{
content = b.ToString();
}
else
{
content = @this.Text.Substring(@this.StartIndex + 1, lenS - 2);
}
return(@this.UncheckedMove(lenS));
}
