public void match_methods_must_set_an_error()
{
var m = new StringMatcher( "A" );
DateTimeStamp ts;
CheckMatchError( m, () => m.MatchDateTimeStamp( out ts ) );
DateTime dt;
CheckMatchError( m, () => m.MatchFileNameUniqueTimeUtcFormat( out dt ) );
CheckMatchError( m, () => m.MatchText( "B" ) );
}
private static void CheckMatchError( StringMatcher m, Func<bool> fail )
{
int idx = m.StartIndex;
int len = m.Length;
Assert.That( fail(), Is.False );
Assert.That( m.IsError );
Assert.That( m.ErrorMessage, Is.Not.Null.Or.Empty );
Assert.That( m.StartIndex == idx, "Head must not move on error." );
Assert.That( m.Length == len, "Length must not change on error." );
m.SetSuccess();
}
private static void CheckDateTimeStamp( DateTimeStamp t )
{
string s = t.ToString();
var m = new StringMatcher( "X" + s + "Y" );
Assert.That( m.MatchChar( 'X' ) );
DateTimeStamp parsed;
Assert.That( m.MatchDateTimeStamp( out parsed ) && parsed == t );
Assert.That( m.MatchChar( 'Y' ) );
m = new StringMatcher( s.Insert( 2, "X" ) );
Assert.That( m.MatchDateTimeStamp( out parsed ), Is.False );
Assert.That( m.ErrorMessage, Is.Not.Null );
int i;
Assert.That( m.MatchInt32( out i ) && i == 20 );
}
public void matching_FileNameUniqueTimeUtcFormat()
{
DateTime t = DateTime.UtcNow;
string s = t.ToString( FileUtil.FileNameUniqueTimeUtcFormat );
var m = new StringMatcher( "X" + s + "Y" );
Assert.That( m.MatchChar( 'X' ) );
DateTime parsed;
Assert.That( m.MatchFileNameUniqueTimeUtcFormat( out parsed ) && parsed == t );
Assert.That( m.MatchChar( 'Y' ) );
m = new StringMatcher( s.Insert( 2, "X" ) );
Assert.That( m.MatchFileNameUniqueTimeUtcFormat( out parsed ), Is.False );
int i;
Assert.That( m.MatchInt32( out i ) && i == 20 );
}
/// <summary>
/// Matches a very simple version of a JSON object content: this match stops at the first closing }.
/// Whitespaces and JS comments (//... or /* ... */) are skipped.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <param name="o">The read object on success as a list of KeyValuePair.</param>
/// <returns>True on success, false on error.</returns>
public static bool MatchJSONObjectContent(this StringMatcher @this, out List <KeyValuePair <string, object> > o)
{
o = null;
while ([email protected])
{
@this.SkipWhiteSpacesAndJSComments();
string propName;
object value;
if (@this.TryMatchChar('}'))
{
if (o == null)
{
o = new List <KeyValuePair <string, object> >();
}
return(true);
}
if ([email protected](out propName))
{
o = null;
return(@this.SetError("Quoted Property Name."));
}
@this.SkipWhiteSpacesAndJSComments();
if ([email protected](':') || !MatchJSONObject(@this, out value))
{
o = null;
return(false);
}
if (o == null)
{
o = new List <KeyValuePair <string, object> >();
}
o.Add(new KeyValuePair <string, object>(propName, value));
@this.SkipWhiteSpacesAndJSComments();
// This accepts e trailing comma at the end of a property list: ..."a":0,} is not an error.
@this.TryMatchChar(',');
}
return(@this.SetError("JSON object definition but reached end of match."));
}
/// <summary>
/// Tries to match a //.... or /* ... */ comment.
/// Proper termination of comment (by a new line or the closing */) is not required:
/// a ending /*... is considered valid.
/// </summary>
/// <param name="this">This <see cref="StringMatcher"/>.</param>
/// <returns>True on success, false if the <see cref="StringMatcher.Head"/> is not on a /.</returns>
public static bool TryMatchJSComment(this StringMatcher @this)
{
if ([email protected]('/'))
{
return(false);
}
if (@this.TryMatchChar('/'))
{
while ([email protected] && @this.Head != '\n')
{
@this.UncheckedMove(1);
}
if ([email protected])
{
@this.UncheckedMove(1);
}
return(true);
}
else if (@this.TryMatchChar('*'))
{
while ([email protected])
{
if (@this.Head == '*')
{
@this.UncheckedMove(1);
if (@this.IsEnd || @this.TryMatchChar('/'))
{
return(true);
}
}
@this.UncheckedMove(1);
}
return(true);
}
@this.UncheckedMove(-1);
return(false);
}
/// <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));
}
/// <summary>
/// Initializes a new <see cref="JSONVisitor"/> bound to a <see cref="Matcher"/>.
/// </summary>
/// <param name="m">The string matcher.</param>
public JSONVisitor(StringMatcher m)
{
_m = m;
_path = new List <Parent>();
}
/// <summary>
/// Initializes a new <see cref="JSONVisitor"/> bound to a <see cref="Matcher"/>.
/// </summary>
/// <param name="m">The string matcher.</param>
public JSONVisitor( StringMatcher m )
{
_m = m;
_path = new List<Parent>();
}
public static bool TryMatchJSONValue(this StringMatcher @this, out object value) => TryMatchJSONTerminalValue(@this, out value);
