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git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ca65/ulabel.h

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+/*****************************************************************************/
+/*                                                                           */
+/*				   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
+
+
+
+/*****************************************************************************/
+/*     	      	     		     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
+
+
+