Add tape current cell highlight

1 files changed, 6 insertions, 2 deletions

diff --git a/bfinter.c b/bfinter.c
index cf4a102..587471c 100644
--- a/bfinter.c
+++ b/bfinter.c
@@ -62,9 +62,12 @@ byte tape_get(const Tape *tape,int idx){
 	return tape->buf[idx];
 }
 
-void tape_print(const Tape *tape){
+// pass curidx=-1 for no highlight
+void tape_print(const Tape *tape,int curidx){
 	for(int i=0;i<=tape->maxidx;i++){
+		if(i==curidx)printf("\x1B[4m");
 		printf("%3d ",tape->buf[i]);
+		if(i==curidx)printf("\x1B[0m");
 	}
 	putchar('\n');
 }
@@ -153,7 +156,7 @@ void interpret(const char *source,const int sourcelen,const Jumpmap *jm){
 			case ',': tape_set(tape,mp,(byte)getchar()); break;
 			case '[': if(!tape_get(tape,mp))ip=jm_get(jm,ip); break;
 			case ']': if(tape_get(tape,mp))ip=jm_get(jm,ip); break;
-			case '#': tape_print(tape); break;
+			case '#': tape_print(tape,mp); break;
 
 			case '0': tape_set(tape,mp,0); break;
 			case '^': ip++; tape_set(tape,mp,tape_get(tape,mp)+(byte)source[ip]); break;
@@ -378,6 +381,7 @@ int main(int argc,char **argv){
 
 	Jumpmap *jm=jm_make(source,sourcelen);
 
+	clearerr(stdin);
 	interpret(source,sourcelen,jm);
 	
 	jm_destroy(jm);