--- lbbs/src/screen.c	2004/10/22 19:51:01	1.4
+++ lbbs/src/screen.c	2004/10/23 08:22:25	1.5
@@ -17,6 +17,8 @@
 
 #include "io.h"
 
+int screen_lines = 24;
+
 void
 moveto (int row, int col)
 {
@@ -39,6 +41,20 @@ clrtoeol ()
 }
 
 void
+clrline (int line_begin, int line_end)
+{
+  int i;
+  
+  for (i = line_begin; i <= line_end; i++)
+  {
+    moveto (i, 0);
+    prints ("\033[K");
+  }
+
+  iflush();
+}
+
+void
 clearscr()
 {
   prints ("\33[2J");
@@ -106,16 +122,32 @@ str_input (char *buffer, int buffer_leng
 }
 
 int
-display_file(const char* filename)
+display_file(const char* filename, int clear, int begin_line)
 {
   char buffer[260];
   FILE *fin;
-  int i;
+  int i, line;
+  
+  if (clear)
+  {
+    clrline(begin_line, screen_lines - 1);
+    line = begin_line;
+    moveto (line, 0);
+  }
   
   if ((fin = fopen(filename, "r")) != NULL)
   {
     while (fgets(buffer, 255, fin))
     {
+      if (line == screen_lines - 1)
+      {
+      	moveto (screen_lines - 1, 0);
+      	press_any_key();
+      	clrline(begin_line, screen_lines - 1);
+      	line = begin_line;
+      	moveto (line, 0);
+      }
+
       i = strlen(buffer);
       if (buffer[i-1] == '\n' && buffer[i-2] != '\r')
       {
@@ -125,6 +157,8 @@ display_file(const char* filename)
       }
       prints (buffer);
       iflush ();
+      
+      line ++;
     }
     fclose (fin);
 
@@ -149,7 +183,7 @@ show_bottom()
 int
 press_any_key()
 {
-  prints ("                       \033[1;33m按任意键盘继续...\033[0;37m");
+  prints ("                          \033[1;33m按任意键盘继续...\033[0;37m");
   iflush();
 
   return igetch ();