呵呵,纯粹为了好玩, ~~

使用说明:

Ctrl+U : 删除光标前(不含光标的在字符)的所有字符
Ctrl+K : 删除光标后(含光标所在字符)的所有字符
Ctrl+Y : 粘贴以上方法最后一次删除的字符

代码修改: (都是增加...)

先在此函数里加一变量 char save_data[STRLEN];

然后增加以下前有 '+' 的代码:

            prints("%s", buf);
            clrtoeol();
            move(y, x + curr);
            continue;
        }

+       if (ch == Ctrl('U') && curr != 0) {
+           move(y, x);
+           if(clen == curr){
+               strncpy(save_data, buf, clen);
+               save_data[clen] = 0;
+               *buf = 0;
+               curr = clen = 0;
+            } else {
+                clen -= curr - 1;
+               snprintf(tmp, clen, "%s", buf + curr);
+               strncpy(save_data, buf, curr);
+               save_data[curr] = 0;
+               curr = 0;
+               strcpy(buf,tmp);
+               buf[--clen] = 0;
+               prints("%s",buf);
+           }
+           clrtoeol();
+           move(y, x);
+           continue;
+       }
+
+        if (ch == Ctrl('K') && curr != clen) {
+           move(y, x);
+           strncpy(save_data, buf + curr, clen - curr);
+           save_data[clen - curr] = 0;
+           buf[curr] = 0;
+           if( curr == 0){
+               curr = clen = 0;
+           } else {
+               clen = curr;
+               prints("%s", buf);
+           }
+           clrtoeol();
+           move(y, x + curr);
+           continue;
+       }
+
+       if (ch == Ctrl('Y') && *save_data != 0 && clen <= len){
+           move(y, x);
+           memset(tmp, 0, sizeof(tmp));
+           strncpy(tmp, buf, curr);
+           strncat(tmp, save_data,
+                   strlen(save_data) + curr > len ?
+                   len - curr : strlen(save_data) );
+           strncat(tmp, buf + curr,
+                   strlen(save_data) + clen > len ?
+                   len - strlen(save_data) - curr: clen - curr);
+           clen += strlen(save_data);
+           clen = clen > len ? len : clen;
+           strncpy(buf, tmp, clen);
+           buf[clen] = 0;
+           prints("%s", buf);
+           curr += strlen(save_data);
+           curr = curr > len ? len : curr;
+           clrtoeol();
+           move(y, x + curr);
+           continue;
+       }  

        if (ch == KEY_DEL) {
            if (curr >= clen) {
                curr = clen;
                continue;
            }  
--