--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/label.c	Tue Feb 24 18:53:52 2015 +0200
@@ -0,0 +1,152 @@
+/*\
+ *  dxa v0.1.1 -- symbolic 65xx disassembler
+ *
+ *  Copyright (C) 1993, 1994 Marko M\"akel\"a
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Contacting the author:
+ *
+ *   Via Internet E-mail:
+ *      <Marko.Makela@FTP.FUNET.FI>
+ *
+ *   Via Snail Mail:
+ *      Marko M\"akel\"a
+ *      Sillitie 10 A
+ *      FIN-01480 VANTAA
+ *      Finland
+\*/
+
+#define _LABEL_C_
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "proto.h"
+#include "options.h"
+#include "opcodes.h"
+
+label *labeltable;
+char defaultlabel[5];
+unsigned numLabels = 0;
+
+#ifndef __STDC__
+void
+AddLabel (address, name)
+     ADDR_T address;
+     char *name;
+#else
+void AddLabel (ADDR_T address, char *name)
+#endif
+{
+  label *entry;
+  char *buffer;
+
+  if (!((buffer = malloc (strlen (name)))))
+    return;
+
+  entry = numLabels ?
+    realloc (labeltable, (numLabels + 1) * sizeof *entry) :
+    malloc (sizeof *entry);
+
+  if (!entry) return;
+
+  labeltable = entry;
+  entry = &labeltable[numLabels++];
+
+  entry->address = address;
+  entry->name = buffer;
+  while ((*buffer++ = *name++));
+}
+
+#ifndef __STDC__
+char *
+Label (address, admode)
+     ADDR_T address;
+     int admode;
+#else
+char *Label (ADDR_T address, int admode)
+#endif
+{
+  label *entry;
+
+  if (!IsLabeled (address)) {
+
+	/* dirty kludge to allow zero page stuff to still work. this sometimes
+		guesses wrong */
+	if (admode == zp)
+    		sprintf (defaultlabel, "$%02x", address);
+	else
+    		sprintf (defaultlabel, "$%04x", address);
+    return defaultlabel;
+  }
+
+  for (entry = &labeltable[numLabels]; entry-- > labeltable;)
+    if (entry->address == address)
+      return entry->name;
+
+  sprintf (defaultlabel, "l%x", address);
+
+  return defaultlabel;
+}
+
+#ifndef __STDC__
+void
+Collect ()
+#else
+void Collect (void)
+#endif
+{
+  unsigned counter = 0;
+  table *entry = NULL, *entry2;
+  label *labels;
+
+  if (fVerbose)
+    fprintf (stderr, "%s: collecting garbage.\n", prog);
+
+  while ((entry = entry2 = FindNextEntryType (entry, 0, 0))) {
+    counter++;
+
+    PutLabel (entry->address);
+    PutLowByte (entry->address);
+    PutHighByte (entry->address);
+
+    while ((entry2 = FindNextEntry (entry2, entry->address,
+                                    ~0, entry->type)))
+      DeleteEntry (entry2); /* remove duplicate warnings */
+  }
+
+  if ((entry = malloc (counter * sizeof *entry))) { /* compact the table */
+    entrycount = counter;
+
+    for (entry2 = scantable; counter; entry2++) {
+      if (!entry2->type) continue;
+
+      memcpy (&entry[--counter], entry2, sizeof *entry);
+    }
+
+    free (scantable);
+    scantable = entry;
+  }
+
+  for (labels = &labeltable[numLabels]; labels-- > labeltable;)
+    if ((ADDR_T)(labels->address - StartAddress) <
+        (ADDR_T)(EndAddress - StartAddress)) {
+      PutLabel (labels->address);
+      PutLowByte (labels->address);
+      PutHighByte (labels->address);
+    }
+}