1 files changed, 73 insertions, 59 deletions

diff --git a/buff.c b/buff.c
index 6462230..93c779b 100644
--- a/buff.c
+++ b/buff.c
@@ -10,41 +10,66 @@ line_t* __search_pos(int addr){
   return cur;
 }
 
-int read_lines(FILE *fin){
-  
-  char buff[4096];
-  line_t *line;
-  size_t s, tot;
+int __get_lines(FILE *fin, line_t **first, line_t **last, int *tot){
 
-  tot = 0;
+  char buff[4096];
+  int n,s, num_alloc=0;
+  line_t *l;
+  
+  n = 0;
+  *tot = 0;
+  *first = *last = NULL;
   while(feof(fin) == 0){
     if (!fgets(buff, 4095, fin)) break;
+    if (buff[0] == '.')
+      break;
     s = strlen(buff) + 1;
-    tot += s-1;
-    line = malloc(sizeof(line_t));
-    line->s = s;
-    line->c = malloc(s * sizeof(char));
-    memcpy(line->c, buff, s);
-    line->next = NULL;
-    
-    if (b_start == NULL){
-      line->prev = NULL;
-      b_start = line;
+    *tot += s -1;
+    l = malloc(sizeof(line_t));
+    l->c = malloc(s * sizeof(char));
+    num_alloc +=1;
+    memcpy(l->c, buff, s);
+    l->s = s;
+    if (*first == NULL){
+      *first = *last = l;
+      (*first) -> next = (*last) -> next = NULL;
+      (*first) -> prev = (*last) -> prev = NULL;
     }
+    
     else{
-      b_end->next = line;
-      line->prev = b_end;
+      (*last) -> next = l;
+      l->prev = *last;
+      l->next = NULL;
+      *last = l;
     }
-    b_end = line;
-    num += 1;
+    n += 1;
   }
-  cur = b_end;
-  pos = num;
-  printf("%d\n", tot);
+  fprintf(stderr, "    >>>> get_lines: num_alloc: %d\n", num_alloc);
+  return n;
 }
 
+int read_file(){
 
+  FILE *fin;
+  int tot;
 
+  fprintf(stderr, "   >>> reading file: %s\n", fname);
+  
+  if (!(fin = fopen(fname, "r"))){
+    return -1;
+  }
+
+  if (b_start){
+    addr1=num, addr2=1;
+    delete_lines();
+  }
+  num = pos = __get_lines(fin, &b_start, &b_end, &tot);
+  fprintf (stderr, "    >>>> read_file: pos: %d num: %d\n", pos, num);
+  cur = b_end;
+  fclose(fin);
+  printf("%d\n", tot);
+  return 0;
+}
 
 
 void print_cur_line(char lineno){
@@ -125,49 +150,22 @@ int move_backward(int n){
   return 0;
 }
 
-int __get_lines(line_t **first, line_t **last){
-
-  char buff[4096];
-  int n,s;
-  line_t *l;
-  
-  n = 0;
-  *first = *last = NULL;
-  while(feof(stdin) == 0){
-    if (!fgets(buff, 4095, stdin)) break;
-    if (buff[0] == '.')
-      break;
-    s = strlen(buff) + 1;
-    l = malloc(sizeof(line_t));
-    l->c = malloc(s * sizeof(char));
-    memcpy(l->c, buff, s);
-    l->s = s;
-    if (*first == NULL)
-      *first = *last = l;
-    else{
-      (*last) -> next = l;
-      l->prev = *last;
-      *last = l;
-    }
-    n += 1;
-  }
-  return n;
-}
 
 
 /* add lines after pos */
 void append_lines(){
 
-  int n;
+  int n, tot;
   line_t *first, *last;
 
   first = last = NULL;
-  n = __get_lines(&first, &last);
+  n = __get_lines(stdin, &first, &last, &tot);
   
   if (addr1 == 0){
     fprintf(stderr, "  >>> append (zero): pos: %d n:%d\n", pos, n);
     last->next = b_start;
-    b_start -> prev = last;
+    if (b_start)
+      b_start -> prev = last;
     b_start = first;
     num += n;
     move_to_line(n,0);
@@ -186,11 +184,11 @@ void append_lines(){
 
 void insert_lines(){
 
-  int n;
+  int n, tot;
   line_t *first, *last;
 
   first = last = NULL;
-  n = __get_lines(&first, &last);
+  n = __get_lines(stdin, &first, &last, &tot);
 
   if (addr1 == 0){
     fprintf(stderr, "  >>> insert (zero): pos: %d n:%d\n", pos, n);
@@ -216,6 +214,7 @@ void insert_lines(){
 void delete_lines(){
 
   line_t *handle;
+  int num_free = 0;
   
   if (addr1 == -1){
     addr1 = pos;
@@ -224,18 +223,33 @@ void delete_lines(){
     addr2 = addr1;
   }
 
-  fprintf(stderr, "    >>> delete: addr1: %d addr2: %d\n", addr1, addr2);
+  if (addr1 < addr2){
+    return;
+  }
   
   move_to_line(addr2,0);
+  fprintf(stderr, "    >>> delete: addr1: %d addr2: %d pos: %d\n", addr1, addr2, pos);
 
   if (addr2 <= 1){ /* we are deleting the first line */
     while(pos <= addr1){
       free(cur->c);
-      cur = cur -> next;
-      if (cur)
+      num_free += 1;
+      if (cur -> next){
+        cur = cur -> next;
         free(cur -> prev);
+      }
+      else {
+        free(cur);
+        cur = NULL;
+        pos ++;
+        break;
+      }
       pos ++;
     }
+
+    fprintf(stderr, "    >>>> delete_lines: num_free: %d\n", num_free);
+    
+    /* free(b_start); */
     b_start = cur;
     if (cur){
       pos = 1;