Added new .feature: pc_assignment

git-svn-id: svn://svn.cc65.org/cc65/trunk@310 b7a2c559-68d2-44c3-8de9-860c34a00d81

src/ca65/error.c

@@ -147,6 +147,7 @@ void ErrorMsg (const FilePos* Pos, unsigned ErrNum, va_list ap)
 	"Identifier expected",
 	"`.endmacro' expected",
 	"Option key expected",
+	"`=' expected",
 	"Command is only valid in 65816 mode",
 	"User error: %s",
 	"String constant too long",

src/ca65/error.h

@@ -88,6 +88,7 @@ enum Errors {
     ERR_IDENT_EXPECTED,
     ERR_ENDMACRO_EXPECTED,
     ERR_OPTION_KEY_EXPECTED,
+    ERR_EQ_EXPECTED,
     ERR_816_MODE_ONLY,
     ERR_USER,
     ERR_STRING_TOO_LONG,

src/ca65/global.c

@@ -68,7 +68,7 @@ unsigned char NoColonLabels   = 0;     	/* Allow labels without a colon */
 unsigned char LooseStringTerm = 0;	/* Allow ' as string terminator */
 unsigned char AtInIdents      = 0;	/* Allow '@' in identifiers */
 unsigned char DollarInIdents  = 0;  	/* Allow '$' in identifiers */
-
+unsigned char PCAssignment    = 0;	/* Allow "* = $XXX" or "$ = $XXX" */
 
 
 

src/ca65/global.h

@@ -69,6 +69,7 @@ extern unsigned char	NoColonLabels;	/* Allow labels without a colon */
 extern unsigned char	LooseStringTerm;/* Allow ' as string terminator */
 extern unsigned char    AtInIdents;	/* Allow '@' in identifiers */
 extern unsigned char	DollarInIdents;	/* Allow '$' in identifiers */
+extern unsigned char	PCAssignment;	/* Allow "* = $XXX" or "$ = $XXX" */
 
 
 

src/ca65/main.c

@@ -314,6 +314,19 @@ static void OptVersion (const char* Opt, const char* Arg)
 
 
 
+static void DoPCAssign (void)
+/* Start absolute code */
+{
+    long PC = ConstExpression ();
+    if (PC < 0 || PC > 0xFFFFFF) {
+	Error (ERR_RANGE);
+    } else {
+	SetAbsPC (PC);
+    }
+}
+
+
+
 static void OneLine (void)
 /* Assemble one line */
 {
@@ -324,49 +337,49 @@ static void OneLine (void)
      * and not from internally pushed input.
      */
     if (!HavePushedInput ()) {
-	InitListingLine ();
+     	InitListingLine ();
     }
 
     if (Tok == TOK_COLON) {
-	/* An unnamed label */
-	ULabDef ();
-	NextTok ();
+     	/* An unnamed label */
+     	ULabDef ();
+     	NextTok ();
     }
 
     /* Assemble the line */
     if (Tok == TOK_IDENT) {
 
-	/* Is it a macro? */
-	if (IsMacro (SVal)) {
+     	/* Is it a macro? */
+     	if (IsMacro (SVal)) {
 
-	    /* Yes, start a macro expansion */
-	    MacExpandStart ();
-	    Done = 1;
+     	    /* Yes, start a macro expansion */
+     	    MacExpandStart ();
+     	    Done = 1;
 
-	} else {
+     	} else {
 
-	    /* No, label. Remember the identifier, then skip it */
-	    int HadWS = WS;	/* Did we have whitespace before the ident? */
-	    strcpy (Ident, SVal);
-	    NextTok ();
+     	    /* No, label. Remember the identifier, then skip it */
+     	    int HadWS = WS;	/* Did we have whitespace before the ident? */
+     	    strcpy (Ident, SVal);
+     	    NextTok ();
 
-	    /* If a colon follows, this is a label definition. If there
-	     * is no colon, it's an assignment.
-	     */
+     	    /* If a colon follows, this is a label definition. If there
+     	     * is no colon, it's an assignment.
+     	     */
        	    if (Tok == TOK_EQ) {
-	    	/* Skip the '=' */
-    	    	NextTok ();
-	    	/* Define the symbol with the expression following the '=' */
-	    	SymDef (Ident, Expression (), 0);
-	    	/* Don't allow anything after a symbol definition */
-	    	Done = 1;
-	    } else {
-	    	/* Define a label */
-	    	SymDef (Ident, CurrentPC (), IsZPSeg ());
-	    	/* Skip the colon. If NoColonLabels is enabled, allow labels
-	    	 * without a colon if there is no whitespace before the
-	    	 * identifier.
-	    	 */
+     	    	/* Skip the '=' */
+     	    	NextTok ();
+     	    	/* Define the symbol with the expression following the '=' */
+     	    	SymDef (Ident, Expression (), 0);
+     	    	/* Don't allow anything after a symbol definition */
+     	    	Done = 1;
+     	    } else {
+     	    	/* Define a label */
+     	    	SymDef (Ident, CurrentPC (), IsZPSeg ());
+     	    	/* Skip the colon. If NoColonLabels is enabled, allow labels
+     	    	 * without a colon if there is no whitespace before the
+     	    	 * identifier.
+     	    	 */
      	    	if (Tok != TOK_COLON) {
      	    	    if (HadWS || !NoColonLabels) {
      	    	     	Error (ERR_COLON_EXPECTED);
@@ -394,7 +407,18 @@ static void OneLine (void)
      	} else if (Tok == TOK_IDENT && IsMacro (SVal)) {
      	    /* A macro expansion */
      	    MacExpandStart ();
-     	}
+     	} else if (PCAssignment && (Tok == TOK_STAR || Tok == TOK_PC)) {
+	    NextTok ();
+	    if (Tok != TOK_EQ) {
+		Error (ERR_EQ_EXPECTED);
+		SkipUntilSep ();
+	    } else {
+		/* Skip the equal sign */
+		NextTok ();
+		/* Enter absolute mode */
+		DoPCAssign ();
+	    }
+	}
     }
 
     /* Line separator must come here */

src/ca65/pseudo.c

@@ -519,6 +519,7 @@ static void DoFeature (void)
     	"LOOSE_STRING_TERM",
     	"AT_IN_IDENTIFIERS",
     	"DOLLAR_IN_IDENTIFIERS",
+	"PC_ASSIGNMENT",
     };
 
     /* Allow a list of comma separated keywords */
@@ -548,6 +549,7 @@ static void DoFeature (void)
      	    case 2:	LooseStringTerm = 1;	break;
 	    case 3:	AtInIdents 	= 1;	break;
 	    case 4:	DollarInIdents	= 1;	break;
+	    case 5:	PCAssignment	= 1;	break;
      	    default:	Internal ("Invalid feature: %d", Feature);
      	}
 
@@ -870,7 +872,7 @@ static void DoOrg (void)
 /* Start absolute code */
 {
     long PC = ConstExpression ();
-    if (PC < 0 || PC > 0xFFFF) {
+    if (PC < 0 || PC > 0xFFFFFF) {
 	Error (ERR_RANGE);
     	return;
     }