shithub: vexed

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implement insert and append commands

	pressing 'i' inserts a new byte before current selection
	pressing 'a' appends a new byte after current selection

--- a/a.h

+++ b/a.h

@@ -9,6 +9,8 @@

 int readfile(Buffer*, char*);

 int writefile(Buffer*, char*);

+int insert(Buffer*, int);

+int append(Buffer*, int);

 /* COLORS */

 enum

@@ -22,5 +24,4 @@

 };

 Image* cols[NCOLS];

-

 void initcols(int);

--- a/buf.c

+++ b/buf.c

@@ -36,7 +36,8 @@

 	return 0;

 }

-int writefile(Buffer *buf, char *filename)

+int

+writefile(Buffer *buf, char *filename)

 {

 	int fd, n;

@@ -48,4 +49,26 @@

 		return -1;

 	close(fd);

 	return 0;

+}

+

+int

+insert(Buffer *buf, int index)

+{

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

+		buf->size *= 1.5;

+		buf->data = realloc(buf->data, buf->size);

+		if(buf->data == nil)

+			return -1;

+	}

+	buf->count += 1;

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

+	buf->data[index] = 0;

+	buf->data[buf->count] = 0;

+	return 1;

+}

+

+int

+append(Buffer *buf, int index)

+{

+	return insert(buf, index + 1);

 }

--- a/vexed.c

+++ b/vexed.c

@@ -313,6 +313,19 @@

 			redraw();

 		}

 		break;

+	case 'i':

+		lastv = -1;

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

+			sysfatal("insert: %r");

+		eresize();

+		break;

+	case 'a':

+		lastv = -1;

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

+			sysfatal("append: %r");

+		sel += 1;

+		eresize();

+		break;

 	default:

 		if(isxdigit(k)){

 			if(e - lastk < 2 && lastv > 0) {