+ struct _PDCLIB_status_t status;
+ status.base = 0;
+ status.flags = 0;
+ status.n = 0;
+ status.i = 0;
+ status.this = 0;
+ status.s = (char *)s;
+ status.width = 0;
+ status.prec = 0;
+ status.stream = NULL;
+ va_copy( status.arg, arg );
+ while ( *format != '\0' )
+ {
+ const char * rc;
+ if ( ( *format != '%' ) || ( ( rc = _PDCLIB_scan( format, &status ) ) == format ) )
+ {
+ /* No conversion specifier, match verbatim */
+ if ( isspace( *format ) )
+ {
+ /* Whitespace char in format string: Skip all whitespaces */
+ /* No whitespaces in input do not result in matching error */
+ while ( isspace( *status.s ) )
+ {
+ ++status.s;
+ ++status.i;
+ }
+ }
+ else
+ {
+ /* Non-whitespace char in format string: Match verbatim */
+ if ( *status.s != *format )
+ {
+ /* Matching error */
+ return status.n;
+ }
+ else
+ {
+ ++status.s;
+ ++status.i;
+ }
+ }
+ ++format;
+ }
+ else
+ {
+ /* NULL return code indicates input error */
+ if ( rc == NULL )
+ {
+ if ( status.n == 0 )
+ {
+ /* input error before any conversion returns EOF */
+ status.n = EOF;
+ }
+ break;
+ }
+ /* Continue parsing after conversion specifier */
+ format = rc;
+ }
+ }
+ va_end( status.arg );
+ return status.n;