quickjs-tart

quickjs-based runtime for wallet-core logic
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terminal.c (2764B)

      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  * SPDX-License-Identifier: curl
     22  *
     23  ***************************************************************************/
     24 #include "tool_setup.h"
     25 
     26 #ifdef HAVE_SYS_IOCTL_H
     27 #include <sys/ioctl.h>
     28 #endif
     29 
     30 #include "terminal.h"
     31 #include "memdebug.h" /* keep this as LAST include */
     32 
     33 #ifdef HAVE_TERMIOS_H
     34 #  include <termios.h>
     35 #elif defined(HAVE_TERMIO_H)
     36 #  include <termio.h>
     37 #endif
     38 
     39 /*
     40  * get_terminal_columns() returns the number of columns in the current
     41  * terminal. It will return 79 on failure. Also, the number can be big.
     42  */
     43 
     44 unsigned int get_terminal_columns(void)
     45 {
     46   unsigned int width = 0;
     47   char *colp = curl_getenv("COLUMNS");
     48   if(colp) {
     49     curl_off_t num;
     50     const char *p = colp;
     51     if(!curlx_str_number(&p, &num, 10000) && (num > 20))
     52       width = (unsigned int)num;
     53     curl_free(colp);
     54   }
     55 
     56   if(!width) {
     57     int cols = 0;
     58 
     59 #ifdef TIOCGSIZE
     60     struct ttysize ts;
     61     if(!ioctl(STDIN_FILENO, TIOCGSIZE, &ts))
     62       cols = ts.ts_cols;
     63 #elif defined(TIOCGWINSZ)
     64     struct winsize ts;
     65     if(!ioctl(STDIN_FILENO, TIOCGWINSZ, &ts))
     66       cols = (int)ts.ws_col;
     67 #elif defined(_WIN32) && !defined(CURL_WINDOWS_UWP) && !defined(UNDER_CE)
     68     {
     69       HANDLE  stderr_hnd = GetStdHandle(STD_ERROR_HANDLE);
     70       CONSOLE_SCREEN_BUFFER_INFO console_info;
     71 
     72       if((stderr_hnd != INVALID_HANDLE_VALUE) &&
     73          GetConsoleScreenBufferInfo(stderr_hnd, &console_info)) {
     74         /*
     75          * Do not use +1 to get the true screen-width since writing a
     76          * character at the right edge will cause a line wrap.
     77          */
     78         cols = (int)
     79           (console_info.srWindow.Right - console_info.srWindow.Left);
     80       }
     81     }
     82 #endif /* TIOCGSIZE */
     83     if(cols >= 0 && cols < 10000)
     84       width = (unsigned int)cols;
     85   }
     86   if(!width)
     87     width = 79;
     88   return width; /* 79 for unknown, might also be tiny or enormous */
     89 }