/*****************************************************************************/
/*                                                                           */
/*				   ulabel.h				     */
/*                                                                           */
/*		  Unnamed labels for the ca65 macroassembler		     */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2000      Ullrich von Bassewitz                                       */
/*               Wacholderweg 14                                             */
/*               D-70597 Stuttgart                                           */
/* EMail:        uz@musoftware.de                                            */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/



#ifndef ULABEL_H
#define ULABEL_H



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/*     	      	     		     Code		     		     */
/*****************************************************************************/



ExprNode* ULabRef (int Which);
/* Get an unnamed label. If Which is negative, it is a backreference (a
 * reference to an already defined label), and the function will return a
 * segment relative expression. If Which is positive, it is a forward ref,
 * and the function will return a expression node for an unnamed label that
 * must be resolved later.
 */

void ULabDef (void);
/* Define an unnamed label at the current PC */

int ULabCanResolve (void);
/* Return true if we can resolve arbitrary ULabels. */

ExprNode* ULabResolve (unsigned Index);
/* Return a valid expression for the unnamed label with the given index. This
 * is used to resolve unnamed labels when assembly is done, so it is an error
 * if a label is still undefined in this phase.
 */

void ULabCheck (void);
/* Run through all unnamed labels and check for anomalies and errors */



/* End of ulabel.h */

#endif