gl/readline.c

   1 /* readline.c --- Simple implementation of readline.
   2    Copyright (C) 2005, 2006 Free Software Foundation, Inc.
   3    Written by Simon Josefsson
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 # include <config.h>
  21 #endif
  22
  23 /* This module is intended to be used when the application only needs
  24    the readline interface.  If you need more functions from the
  25    readline library, it is recommended to require the readline library
  26    (or improve this module) rather than #if-protect part of your
  27    application (doing so would add assumptions of this module into
  28    your application).  The application should use #include
  29    "readline.h", that header file will include <readline/readline.h>
  30    if the real library is present on the system. */
  31
  32 /* Get specification. */
  33 #include "readline.h"
  34
  35 #include <stdio.h>
  36 #include <string.h>
  37 #include <getline.h>
  38
  39 char *
  40 readline (const char *prompt)
  41 {
  42   char *out = NULL;
  43   size_t size = 0;
  44
  45   if (prompt)
  46     fputs (prompt, stdout);
  47
  48   if (getline (&out, &size, stdin) < 0)
  49     return NULL;
  50
  51   while (*out && (out[strlen (out) - 1] == '\r'
  52                   || out[strlen (out) - 1] == '\n'))
  53     out[strlen (out) - 1] = '\0';
  54
  55   return out;
  56 }