/// <summary>
/// Take and return the current value and advance this iterator the next value.
/// </summary>
/// <returns>The taken current value.</returns>
public static T TakeCurrent <T>(this Iterator <T> iterator)
{
PreCondition.AssertNotNull(iterator, nameof(iterator));
PreCondition.AssertTrue(iterator.HasCurrent(), "iterator.HasCurrent()");
T result = iterator.Current;
iterator.Next();
return(result);
}
private void ReadDigits()
{
PreCondition.AssertTrue(this.characters.HasCurrent(), "this.characters.HasCurrent()");
PreCondition.AssertTrue(PkgdefTokenizer.IsDigit(this.characters.GetCurrent()), "PkgdefTokenizer.IsDigit(this.characters.GetCurrent())");
int startIndex = this.characters.GetCurrentIndex();
StringBuilder builder = new StringBuilder().Append(this.characters.TakeCurrent());
while (this.characters.HasCurrent() && PkgdefTokenizer.IsDigit(this.characters.GetCurrent()))
{
builder.Append(this.characters.TakeCurrent());
}
this.tokenQueue.Enqueue(PkgdefToken.Digits(startIndex, builder.ToString()));
}
private static PkgdefSegment ParseSegment(PkgdefTokenizer tokenizer, Action <PkgdefIssue> onIssue)
{
PreCondition.AssertNotNull(tokenizer, nameof(tokenizer));
PreCondition.AssertTrue(tokenizer.HasCurrent(), "tokenizer.HasCurrent()");
PreCondition.AssertNotNull(onIssue, nameof(onIssue));
PkgdefSegment result;
switch (tokenizer.GetCurrent().GetTokenType())
{
case PkgdefTokenType.Whitespace:
result = PkgdefSegment.Whitespace(tokenizer.GetCurrent().GetStartIndex(), tokenizer.GetCurrent().GetText());
tokenizer.Next();
break;
case PkgdefTokenType.NewLine:
result = PkgdefSegment.NewLine(tokenizer.GetCurrent().GetStartIndex(), tokenizer.GetCurrent().GetText());
tokenizer.Next();
break;
case PkgdefTokenType.ForwardSlash:
result = PkgdefDocument.ParseLineComment(tokenizer, onIssue);
break;
case PkgdefTokenType.LeftSquareBracket:
result = PkgdefDocument.ParseRegistryKeyPath(tokenizer, onIssue);
break;
case PkgdefTokenType.AtSign:
case PkgdefTokenType.DoubleQuote:
result = PkgdefDocument.ParseRegistryKeyDataItem(tokenizer, onIssue);
break;
default:
result = PkgdefSegment.Unrecognized(tokenizer.GetCurrent().GetStartIndex(), tokenizer.GetCurrent().GetText());
tokenizer.Next();
break;
}
return(result);
}
private void ReadWhitespace()
{
PreCondition.AssertTrue(this.characters.HasCurrent(), "this.characters.HasCurrent()");
PreCondition.AssertTrue(PkgdefTokenizer.IsWhitespaceCharacter(this.characters.GetCurrent()), "PkgdefTokenizer.IsWhitespaceCharacter(this.characters.GetCurrent())");
PkgdefToken newLineToken = null;
int startIndex = this.characters.GetCurrentIndex();
StringBuilder builder = new StringBuilder();
while (this.characters.HasCurrent() && PkgdefTokenizer.IsWhitespaceCharacter(this.characters.GetCurrent()))
{
if (this.characters.GetCurrent() != '\r')
{
builder.Append(this.characters.TakeCurrent());
}
else
{
int newLineStartIndex = this.characters.GetCurrentIndex();
if (this.characters.Next() && this.characters.GetCurrent() == '\n')
{
newLineToken = PkgdefToken.NewLine(newLineStartIndex, "\r\n");
this.characters.Next();
break;
}
else
{
builder.Append('\r');
}
}
}
if (builder.Length > 0)
{
this.tokenQueue.Enqueue(PkgdefToken.Whitespace(startIndex, builder.ToString()));
}
if (newLineToken != null)
{
this.tokenQueue.Enqueue(newLineToken);
}
}
internal static PkgdefRegistryKeyPathSegment ParseRegistryKeyPath(PkgdefTokenizer tokenizer, Action <PkgdefIssue> onIssue)
{
PreCondition.AssertNotNull(tokenizer, nameof(tokenizer));
PreCondition.AssertTrue(tokenizer.HasCurrent(), "tokenizer.HasCurrent()");
PreCondition.AssertEqual(tokenizer.GetCurrent().GetTokenType(), PkgdefTokenType.LeftSquareBracket, "tokenizer.GetCurrent().GetTokenType()");
PreCondition.AssertNotNull(onIssue, nameof(onIssue));
List <PkgdefToken> tokens = new List <PkgdefToken>()
{
tokenizer.TakeCurrent()
};
while (tokenizer.HasCurrent())
{
PkgdefTokenType tokenType = tokenizer.GetCurrent().GetTokenType();
if (tokenType == PkgdefTokenType.NewLine)
{
break;
}
else
{
tokens.Add(tokenizer.TakeCurrent());
if (tokenType == PkgdefTokenType.RightSquareBracket)
{
break;
}
}
}
PkgdefRegistryKeyPathSegment result = new PkgdefRegistryKeyPathSegment(tokens);
if (result.GetRightSquareBracket() == null)
{
onIssue(new PkgdefIssue(result.GetStartIndex(), result.GetLength(), "Missing registry key path right square bracket (']')."));
}
return(result);
}
internal static PkgdefSegment ParseLineComment(PkgdefTokenizer tokenizer, Action <PkgdefIssue> onIssue)
{
PreCondition.AssertNotNull(tokenizer, nameof(tokenizer));
PreCondition.AssertTrue(tokenizer.HasCurrent(), "tokenizer.HasCurrent()");
PreCondition.AssertEqual(tokenizer.GetCurrent().GetTokenType(), PkgdefTokenType.ForwardSlash, "tokenizer.GetCurrent().GetTokenType()");
PreCondition.AssertNotNull(onIssue, nameof(onIssue));
PkgdefSegment result;
int startIndex = tokenizer.TakeCurrent().GetStartIndex();
StringBuilder builder = new StringBuilder().Append('/');
if (!tokenizer.HasCurrent())
{
onIssue(new PkgdefIssue(startIndex, 1, "Missing line-comment's second forward slash ('/')."));
result = PkgdefSegment.Unrecognized(startIndex, builder.ToString());
}
else if (tokenizer.GetCurrent().GetTokenType() != PkgdefTokenType.ForwardSlash)
{
onIssue.Invoke(new PkgdefIssue(startIndex + 1, 1, "Expected line-comment's second forward slash ('/')."));
result = PkgdefSegment.Unrecognized(startIndex, builder.ToString());
}
else
{
builder.Append('/');
tokenizer.Next();
while (tokenizer.HasCurrent() && tokenizer.GetCurrent().GetTokenType() != PkgdefTokenType.NewLine)
{
builder.Append(tokenizer.TakeCurrent().GetText());
}
string text = builder.ToString();
result = PkgdefSegment.LineComment(startIndex, text);
}
return(result);
}
internal static PkgdefRegistryKeyDataItemSegment ParseRegistryKeyDataItem(PkgdefTokenizer tokenizer, Action <PkgdefIssue> onIssue)
{
PreCondition.AssertNotNull(tokenizer, nameof(tokenizer));
PreCondition.AssertTrue(tokenizer.HasCurrent(), "tokenizer.HasCurrent()");
PreCondition.AssertOneOf(tokenizer.GetCurrent().GetTokenType(), new[] { PkgdefTokenType.AtSign, PkgdefTokenType.DoubleQuote }, "tokenizer.GetCurrent().GetTokenType()");
PreCondition.AssertNotNull(onIssue, nameof(onIssue));
PkgdefToken registryKeyDataItemNameFirstToken = tokenizer.TakeCurrent();
List <PkgdefToken> tokens = new List <PkgdefToken>()
{
registryKeyDataItemNameFirstToken
};
bool dataItemDone = false;
if (registryKeyDataItemNameFirstToken.GetTokenType() == PkgdefTokenType.DoubleQuote)
{
if (!tokenizer.HasCurrent())
{
onIssue(new PkgdefIssue(registryKeyDataItemNameFirstToken.GetStartIndex(), registryKeyDataItemNameFirstToken.GetLength(), "Missing registry key data item name closing double-quote ('\"')."));
dataItemDone = true;
}
else
{
while (tokenizer.HasCurrent())
{
PkgdefTokenType tokenType = tokenizer.GetCurrent().GetTokenType();
if (tokenType == PkgdefTokenType.NewLine)
{
onIssue(new PkgdefIssue(PkgdefToken.GetStartIndex(tokens), PkgdefToken.GetLength(tokens), "Missing registry key data item name closing double-quote ('\"')."));
dataItemDone = true;
break;
}
else
{
PkgdefToken token = tokenizer.TakeCurrent();
tokens.Add(token);
if (token.GetTokenType() == PkgdefTokenType.DoubleQuote)
{
break;
}
}
}
}
}
if (!dataItemDone)
{
if (!tokenizer.HasCurrent())
{
onIssue(new PkgdefIssue(PkgdefToken.GetStartIndex(tokens), PkgdefToken.GetLength(tokens), "Missing registry key data item equals sign ('=')."));
dataItemDone = true;
}
else
{
while (tokenizer.HasCurrent())
{
PkgdefTokenType tokenType = tokenizer.GetCurrent().GetTokenType();
if (tokenType == PkgdefTokenType.NewLine)
{
onIssue(new PkgdefIssue(PkgdefToken.GetStartIndex(tokens), PkgdefToken.GetLength(tokens), "Missing registry key data item equals sign ('=')."));
dataItemDone = true;
break;
}
else
{
PkgdefToken token = tokenizer.TakeCurrent();
tokens.Add(token);
if (token.GetTokenType() == PkgdefTokenType.EqualsSign)
{
break;
}
else if (token.GetTokenType() != PkgdefTokenType.Whitespace)
{
onIssue(new PkgdefIssue(token.GetStartIndex(), token.GetLength(), "Expected registry key data item equals sign ('=')."));
}
}
}
}
}
if (!dataItemDone)
{
if (!tokenizer.HasCurrent())
{
onIssue(new PkgdefIssue(PkgdefToken.GetStartIndex(tokens), PkgdefToken.GetLength(tokens), "Missing registry key data item value."));
}
else
{
int dataItemValueTokenCount = 0;
while (tokenizer.HasCurrent())
{
PkgdefTokenType tokenType = tokenizer.GetCurrent().GetTokenType();
if (tokenType == PkgdefTokenType.NewLine)
{
if (dataItemValueTokenCount == 0)
{
onIssue(new PkgdefIssue(PkgdefToken.GetStartIndex(tokens), PkgdefToken.GetLength(tokens), "Missing registry key data item value."));
}
break;
}
else
{
PkgdefToken token = tokenizer.TakeCurrent();
tokens.Add(token);
if (token.GetTokenType() != PkgdefTokenType.Whitespace)
{
dataItemValueTokenCount++;
}
}
}
}
}
return(new PkgdefRegistryKeyDataItemSegment(tokens));
}