gdb/stub-termcap.c

   1 /* A very minimal do-nothing termcap emulation stub.
   2
   3    Copyright (C) 2005-2020 Free Software Foundation, Inc.
   4
   5    Contributed by CodeSourcery, LLC.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22
  23 #include "defs.h"
  24
  25 extern "C" {
  26
  27 /* -Wmissing-prototypes */
  28 extern int tgetent (char *buffer, char *termtype);
  29 extern int tgetnum (char *name);
  30 extern int tgetflag (char *name);
  31 extern char* tgetstr (char *name, char **area);
  32 extern int tputs (char *string, int nlines, int (*outfun) (int));
  33 extern char *tgoto (const char *cap, int col, int row);
  34
  35 }
  36
  37 /* These globals below are global termcap variables that readline
  38    references.
  39
  40    Actually, depending on preprocessor conditions that we don't want
  41    to mirror here (as they may change depending on readline versions),
  42    readline may define these globals as well, relying on the linker
  43    merging them if needed (-fcommon).  That doesn't work with
  44    -fno-common or C++, so instead we define the symbols as weak.
  45    Don't do this on Windows though, as MinGW gcc 3.4.2 doesn't support
  46    weak (later versions, e.g., 4.8, do support it).  Given this stub
  47    file originally was Windows only, and we only needed this when we
  48    made it work on other hosts, it should be OK.  */
  49 #ifndef __MINGW32__
  50 char PC __attribute__((weak));
  51 char *BC __attribute__((weak));
  52 char *UP __attribute__((weak));
  53 #endif
  54
  55 /* Each of the files below is a minimal implementation of the standard
  56    termcap function with the same name, suitable for use in a Windows
  57    console window, or when a real termcap/curses library isn't
  58    available.  */
  59
  60 int
  61 tgetent (char *buffer, char *termtype)
  62 {
  63   return -1;
  64 }
  65
  66 int
  67 tgetnum (char *name)
  68 {
  69   return -1;
  70 }
  71
  72 int
  73 tgetflag (char *name)
  74 {
  75   return -1;
  76 }
  77
  78 char *
  79 tgetstr (char *name, char **area)
  80 {
  81   return NULL;
  82 }
  83
  84 int
  85 tputs (char *string, int nlines, int (*outfun) (int))
  86 {
  87   while (*string)
  88     outfun (*string++);
  89
  90   return 0;
  91 }
  92
  93 char *
  94 tgoto (const char *cap, int col, int row)
  95 {
  96   return NULL;
  97 }