Added register_match().

git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@110 b68d4a1b-bc3d-0410-92ed-d4ac073336b7

include/jtag/register.h

@@ -32,11 +32,12 @@ typedef struct tap_register {
 } tap_register;
 
 tap_register *register_alloc( int len );
-tap_register *register_duplicate( tap_register *tr );
+tap_register *register_duplicate( const tap_register *tr );
 void register_free( tap_register *tr );
 tap_register *register_fill( tap_register *tr, int val );
 const char *register_get_string( tap_register *tr );
 tap_register *register_init( tap_register *tr, const char *value );
 int register_compare( const tap_register *tr, const tap_register *tr2 );
+int register_match( const tap_register *tr, const char *expr );
 
 #endif /* JTAG_REGISTER_H */

jtag/src/tap/register.c

@@ -59,7 +59,7 @@ register_alloc( int len )
 }
 
 tap_register *
-register_duplicate( tap_register *tr )
+register_duplicate( const tap_register *tr )
 {
  	if (!tr)
 		return	NULL;
@@ -144,3 +144,21 @@ register_compare( const tap_register *tr, const tap_register *tr2 )
 
 	return 0;
 }
+
+int
+register_match( const tap_register *tr, const char *expr )
+{
+	int i;
+	char *s;
+
+	if (!tr || !expr || (tr->len != strlen( expr )))
+		return 0;
+
+	s = register_get_string( tr );
+
+	for (i = 0; i < tr->len; i++)
+		if ((expr[i] != '?') && (expr[i] != s[i]))
+			return 0;
+
+	return 1;
+}