implemented 'm' and 't'

1 files changed, 29 insertions, 42 deletions

diff --git a/buff.c b/buff.c
index 6b3af61..c9d6800 100644
--- a/buff.c
+++ b/buff.c
@@ -95,8 +95,26 @@ void __append_lines(int addr, int n, line_t *first, line_t *last){
 }
 
 
-void __copy_lines(line_t **first, line_t **last){
-
+int __copy_lines(line_t **first, line_t **last){
+  
+  line_t *new, *l, *p;
+  int n = addr2;
+  
+  move_to_line(addr2,0);
+  l = malloc(sizeof(line_t));
+  l-> c = malloc((strlen(cur->c) + 1) * sizeof(char));
+  strcpy(l->c, cur->c);
+  p = *first = l;
+  while(++n <= addr1){
+    cur = cur -> next, pos++;
+    l = malloc(sizeof(line_t));
+    l->c = malloc((strlen(cur->c) + 1) * sizeof(char));
+    strcpy(l->c, cur->c);
+    p->next = l;
+    p = l;
+  }
+  *last = p;
+  return n - addr2;
 }
 
 
@@ -178,32 +196,6 @@ void print_lineno(){
   printf("%d\n", addr1);
 }
 
-int move_forward(int n){
-
-  if (pos + n > num){
-    E;
-    return -1;
-  }
-  while(n-- > 0){
-    cur = cur->next;
-  }
-  pos += n;
-  return 0;
-}
-
-int move_backward(int n){
-
-  if (pos - n < 1){
-    E;
-    return -1;
-  }
-  while(n-- >0){
-    cur = cur->prev;
-  }
-  pos -= n;
-  return 0;
-}
-
 
 
 /* add lines after pos */
@@ -248,8 +240,7 @@ void delete_lines(){
   if (addr2 > 1){
     handle = cur -> prev;
   }
-  while(pos <= addr1){
-    pos ++;
+  while(pos++ <= addr1){
     next = cur -> next;
     prev = cur -> prev;
     free(cur -> c);
@@ -259,7 +250,6 @@ void delete_lines(){
     else
       break;
   }
-
   if (!handle){
     /* first line deleted */
     b_start = cur;
@@ -274,7 +264,6 @@ void delete_lines(){
     pos = addr2 - 1;
     cur = prev;
   }
-  
   num -= addr1 - addr2 + 1; 
 }
 
@@ -372,26 +361,24 @@ int mark(char *c){
 }
 
 
-int transfer_lines(int addr, char move){
+void transfer_lines(int addr, char move){
 
   line_t *first, *last;
-
+  int n;
+  
   if (addr2 < addr && addr < addr1){
     E;
-    return -1;
+    return;
   }
   
   first = last = NULL;
-  
-  __copy_lines(&first, &last);
-
+  n = __copy_lines(&first, &last);
+  fprintf(stderr, "    >>>> transfer_lines -- addr: %d n: %d\n", addr, n);
   if (move){
     if (addr1 < addr)
       addr -= (addr1 - addr2 + 1);
     delete_lines();
   }
-  /* make a generic function to append lines after an addr */
-  
-  return 0;
-  
+  __append_lines(addr, n, first, last);
+  move_to_line(addr+n,0);
 }