// ParseNamedVariableName
//------------------------------------------------------------------------------
/*static*/ bool BFFParser::ParseVariableName( BFFIterator & iter, AString & name, bool & parentScope )
{
// skip over the declaration symbol
ASSERT( *iter == BFF_DECLARE_VAR_INTERNAL ||
*iter == BFF_DECLARE_VAR_PARENT );
parentScope = ( *iter == BFF_DECLARE_VAR_PARENT );
const BFFIterator varNameStart = iter; // include type token in var name
iter++;
// make sure we haven't hit the end of the file
if ( iter.IsAtEnd() )
{
Error::Error_1012_UnexpectedEndOfFile( iter );
return false;
}
// make sure immediately after the symbol starts a variable name
if ( iter.IsAtValidVariableNameCharacter() == false )
{
Error::Error_1013_UnexpectedCharInVariableName( iter, nullptr );
return false;
}
// find the end of the variable name
iter.SkipVariableName();
const BFFIterator varNameEnd = iter;
// sanity check it is a sensible length
size_t varNameLen = varNameStart.GetDistTo( varNameEnd );
if ( varNameLen > MAX_VARIABLE_NAME_LENGTH )
{
Error::Error_1014_VariableNameIsTooLong( iter, (uint32_t)varNameLen, (uint32_t)MAX_VARIABLE_NAME_LENGTH );
return false;
}
// store variable name
name.Assign( varNameStart.GetCurrent(), varNameEnd.GetCurrent() );
if ( parentScope )
{
// exchange '^' with '.'
ASSERT( BFF_DECLARE_VAR_PARENT == name[0] );
name[0] = BFF_DECLARE_VAR_INTERNAL;
}
return true;
}
// ParseNamedVariableName
//------------------------------------------------------------------------------
/*static*/ bool BFFParser::ParseVariableName( BFFIterator & iter, AString & name, bool & parentScope )
{
// skip over the declaration symbol
ASSERT( *iter == BFF_DECLARE_VAR_INTERNAL ||
*iter == BFF_DECLARE_VAR_PARENT );
parentScope = ( *iter == BFF_DECLARE_VAR_PARENT );
const BFFIterator varNameStart = iter; // include type token in var name
iter++;
// make sure we haven't hit the end of the file
if ( iter.IsAtEnd() )
{
Error::Error_1012_UnexpectedEndOfFile( iter );
return false;
}
if ( *iter == '\'' || *iter == '"' )
{
// parse the string
const BFFIterator openToken = iter;
iter.SkipString( *openToken );
if ( *iter != *openToken )
{
Error::Error_1002_MatchingClosingTokenNotFound( openToken, nullptr, *openToken );
return false;
}
BFFIterator stringStart = openToken;
stringStart++;
// unescape and subsitute embedded variables
AStackString< 256 > value;
if ( PerformVariableSubstitutions( stringStart, iter, value ) == false )
{
return false;
}
iter++; // skip close token
BFFIterator varNameIter( value.Get(), value.GetLength(), iter.GetFileName().Get(), iter.GetFileTimeStamp() );
// sanity check it is a sensible length
if ( value.GetLength() + 1/* '.' will be added */ > MAX_VARIABLE_NAME_LENGTH )
{
Error::Error_1014_VariableNameIsTooLong( varNameIter, (uint32_t)value.GetLength(), (uint32_t)MAX_VARIABLE_NAME_LENGTH );
return false;
}
// sanity check it is a valid variable name
while ( varNameIter.IsAtEnd() == false )
{
if ( varNameIter.IsAtValidVariableNameCharacter() == false )
{
Error::Error_1013_UnexpectedCharInVariableName( varNameIter, nullptr );
return false;
}
varNameIter++;
}
// append '.' to variable name
name = ".";
name.Append( value );
}
else
{
// make sure immediately after the symbol starts a variable name
if ( iter.IsAtValidVariableNameCharacter() == false )
{
Error::Error_1013_UnexpectedCharInVariableName( iter, nullptr );
return false;
}
// find the end of the variable name
iter.SkipVariableName();
const BFFIterator varNameEnd = iter;
// sanity check it is a sensible length
size_t varNameLen = varNameStart.GetDistTo( varNameEnd );
if ( varNameLen > MAX_VARIABLE_NAME_LENGTH )
{
Error::Error_1014_VariableNameIsTooLong( iter, (uint32_t)varNameLen, (uint32_t)MAX_VARIABLE_NAME_LENGTH );
return false;
}
// store variable name
name.Assign( varNameStart.GetCurrent(), varNameEnd.GetCurrent() );
}
ASSERT( name.GetLength() > 0 );
if ( parentScope )
{
// exchange '^' with '.'
ASSERT( BFF_DECLARE_VAR_PARENT == name[0] );
name[0] = BFF_DECLARE_VAR_INTERNAL;
}
return true;
}