//
// Get a single character from the input stream and return it, or 0=end.
//
TCHAR FBaseParser::GetChar(bool bLiteral)
{
bool bInsideComment = false;
PrevPos = InputPos;
PrevLine = InputLine;
Loop:
const TCHAR c = Input[InputPos++];
if (bInsideComment)
{
// Record the character as a comment.
PrevComment += c;
}
if (c == TEXT('\n'))
{
InputLine++;
}
else if (!bLiteral)
{
const TCHAR NextChar = PeekChar();
if ( c==TEXT('/') && NextChar==TEXT('*') )
{
if (!bInsideComment)
{
ClearComment();
// Record the slash and star.
PrevComment += c;
PrevComment += NextChar;
bInsideComment = true;
// Move past the star. Do it only when not in comment,
// otherwise end of comment might be missed e.g.
// /*/ Comment /*/
// ~~~~~~~~~~~~~^ Will report second /* as beginning of comment
// And throw error that end of file is found in comment.
InputPos++;
}
goto Loop;
}
else if( c==TEXT('*') && NextChar==TEXT('/') )
{
if (!bInsideComment)
{
ClearComment();
FError::Throwf(TEXT("Unexpected '*/' outside of comment") );
}
/** Asterisk and slash always end comment. */
bInsideComment = false;
// Star already recorded; record the slash.
PrevComment += Input[InputPos];
InputPos++;
goto Loop;
}
}
if (bInsideComment)
{
if (c == 0)
{
ClearComment();
FError::Throwf(TEXT("End of class header encountered inside comment") );
}
goto Loop;
}
return c;
}
//
// Skip past all spaces and tabs in the input stream.
//
TCHAR FBaseParser::GetLeadingChar()
{
TCHAR TrailingCommentNewline = 0;
for (;;)
{
bool MultipleNewlines = false;
TCHAR c;
// Skip blanks.
do
{
c = GetChar();
// Check if we've encountered another newline since the last one
if (c == TrailingCommentNewline)
{
MultipleNewlines = true;
}
} while (IsWhitespace(c));
if (c != TEXT('/') || PeekChar() != TEXT('/'))
{
return c;
}
// Clear the comment if we've encountered newlines since the last comment
if (MultipleNewlines)
{
ClearComment();
}
// Record the first slash. The first iteration of the loop will get the second slash.
PrevComment += c;
do
{
c = GetChar(true);
if (c == 0)
return c;
PrevComment += c;
} while (!IsEOL(c));
TrailingCommentNewline = c;
for (;;)
{
c = GetChar();
if (c == 0)
return c;
if (c == TrailingCommentNewline || !IsEOL(c))
{
UngetChar();
break;
}
PrevComment += c;
}
}
}
//
// Get a single character from the input stream and return it, or 0=end.
//
TCHAR FBaseParser::GetChar(bool bLiteral)
{
int32 CommentCount = 0;
PrevPos = InputPos;
PrevLine = InputLine;
Loop:
const TCHAR c = Input[InputPos++];
if ( CommentCount > 0 )
{
// Record the character as a comment.
PrevComment += c;
}
if (c == TEXT('\n'))
{
InputLine++;
}
else if (!bLiteral)
{
const TCHAR NextChar = PeekChar();
if ( c==TEXT('/') && NextChar==TEXT('*') )
{
if ( CommentCount == 0 )
{
ClearComment();
// Record the slash and star.
PrevComment += c;
PrevComment += NextChar;
}
CommentCount++;
InputPos++;
goto Loop;
}
else if( c==TEXT('*') && NextChar==TEXT('/') )
{
if (--CommentCount < 0)
{
ClearComment();
FError::Throwf(TEXT("Unexpected '*/' outside of comment") );
}
// Star already recorded; record the slash.
PrevComment += Input[InputPos];
InputPos++;
goto Loop;
}
}
if (CommentCount > 0)
{
if (c == 0)
{
ClearComment();
FError::Throwf(TEXT("End of class header encountered inside comment") );
}
goto Loop;
}
return c;
}