variant variant_from_stream( T& in, uint32_t depth )
{
depth++;
FC_ASSERT( depth <= JSON_MAX_RECURSION_DEPTH );
skip_white_space( in, depth );
variant var;
while( true )
{
signed char c = in.peek();
switch( c )
{
case ' ':
case '\t':
case '\n':
case '\r':
in.get();
continue;
case '"':
return stringFromStream( in, depth );
case '{':
return objectFromStream<T, parser_type>( in, depth );
case '[':
return arrayFromStream<T, parser_type>( in, depth );
case '-':
case '.':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return number_from_stream<T, parser_type>( in, depth );
// null, true, false, or 'warning' / string
case 'n':
case 't':
case 'f':
return token_from_stream( in, depth );
case 0x04: // ^D end of transmission
case EOF:
case 0:
FC_THROW_EXCEPTION( eof_exception, "unexpected end of file" );
default:
FC_THROW_EXCEPTION( parse_error_exception, "Unexpected char '${c}' in \"${s}\"",
("c", c)("s", stringFromToken( in, depth )) );
}
}
return variant();
}
variant variant_from_stream( T& in, uint32_t max_depth )
{
if( max_depth == 0 )
FC_THROW_EXCEPTION( parse_error_exception, "Too many nested items in JSON input!" );
skip_white_space(in);
signed char c = in.peek();
switch( c )
{
case '"':
return stringFromStream( in );
case '{':
return objectFromStream<T, parser_type>( in, max_depth - 1 );
case '[':
return arrayFromStream<T, parser_type>( in, max_depth - 1 );
case '-':
case '.':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return number_from_stream<T, parser_type>( in );
// null, true, false, or 'warning' / string
case 'n':
case 't':
case 'f':
return token_from_stream( in );
case 0x04: // ^D end of transmission
case EOF:
FC_THROW_EXCEPTION( eof_exception, "unexpected end of file" );
case 0:
if( parser_type == fc::json::broken_nul_parser )
return variant();
FALLTHROUGH
default:
FC_THROW_EXCEPTION( parse_error_exception, "Unexpected char '${c}' in \"${s}\"",
("c", c)("s", stringFromToken(in)) );
}
}
