shithub: vexed

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implement deletion

	pressing 'x' deletes the currently selected byte

--- a/a.h

+++ b/a.h

@@ -9,6 +9,7 @@

 int readfile(Buffer*, char*);

 int writefile(Buffer*, char*);

+int delete(Buffer*, int);

 int insert(Buffer*, int);

 int append(Buffer*, int);

--- a/buf.c

+++ b/buf.c

@@ -52,6 +52,20 @@

 }

 int

+delete(Buffer *buf, int index)

+{

+	if(index != buf->count - 1)

+		memmove(&buf->data[index], &buf->data[index + 1], buf->count - index);

+	buf->count -= 1;

+	/* TODO: is that really what we want ? */

+	if(buf->count == 0){

+		buf->count = 1;

+		buf->data[0] = 0;

+	}

+	return 0;

+}

+

+int

 insert(Buffer *buf, int index)

 {

 	if(buf->count == buf->size){

--- a/vexed.c

+++ b/vexed.c

@@ -315,11 +315,21 @@

 			redraw();

 		}

 		break;

+	case 'x':

+	case 'X':

+		if(delete(&buf, sel) < 0)

+			sysfatal("delete: %r");

+		if(sel == buf.count)

+			--sel;

+		modified = 1;

+		eresize();

+		break;

 	case 'i':

 	case 'I':

 		lastv = -1;

 		if(insert(&buf, sel) < 0)

 			sysfatal("insert: %r");

+		modified = 1;

 		eresize();

 		break;

 	case 'p':

@@ -328,6 +338,7 @@

 		if(append(&buf, sel) < 0)

 			sysfatal("append: %r");

 		sel += 1;

+		modified = 1;

 		eresize();

 		break;

 	default: