bore

commit 2e5d0e9de9f3861d2bb094d20e94e5a66b70ba7f
parent 4c0c0eef7ba78a6877908cb7b2f5634eeedc30ef
Author: phoebos <ben@bvnf.space>
Date:   Fri, 24 Sep 2021 01:54:52 +0100

ed: check if buffer was changed; add 'Q'

Diffstat:
M
PROGRESS
 | 
2
+-
M
ed.c
 | 
10
++++++++++

2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/PROGRESS b/PROGRESS
@@ -14,7 +14,7 @@
 [ ] dirname
 [ ] du
 [x] echo
-[ ] ed [-ps] p i a
+[ ] ed [-ps] p i a q Q
 [x] false
 [ ] find
 [ ] grep
diff --git a/ed.c b/ed.c
@@ -199,6 +199,7 @@ delete_line(int lineno) {
 
 int
 ed(char *startfile) {
+    int changed = 0;
     if (startfile) 
         if (read_buf(startfile) != 0)
             return 1;
@@ -250,12 +251,14 @@ ed(char *startfile) {
                     printf("?\n");
                     continue;
                 }
+                changed = 1;
                 break;
             case 'a':
                 if (input(cur_line+1) != 0) {
                     printf("?\n");
                     continue;
                 }
+                changed = 1;
                 break;
             case 'p':
                 printf("%s", find_line(cur_line)->s);
@@ -265,6 +268,7 @@ ed(char *startfile) {
                     printf("?\n");
                     continue;
                 }
+                changed = 1;
                 break;
             case 'c':
                 /* delete then insert */
@@ -272,6 +276,7 @@ ed(char *startfile) {
                     printf("?\n");
                     continue;
                 }
+                changed = 1;
                 if (input(cur_line) != 0) {
                     printf("?\n");
                     continue;
@@ -285,6 +290,11 @@ ed(char *startfile) {
                     printf("? writing to a new filename not yet implemented\n");
                 break;
             case 'q':
+                if (changed == 0)
+                    return 0;
+                printf("?\n");
+                break;
+            case 'Q':
                 return 0;
             case '\n':
                 break;