gdb/stub-termcap.c

   1 /* A very minimal do-nothing termcap emulation stub.
   2
   3    Copyright (C) 2005-2016 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 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 /* -Wmissing-prototypes */
  30 extern int tgetent (char *buffer, char *termtype);
  31 extern int tgetnum (char *name);
  32 extern int tgetflag (char *name);
  33 extern char* tgetstr (char *name, char **area);
  34 extern int tputs (char *string, int nlines, int (*outfun) (int));
  35 extern char *tgoto (const char *cap, int col, int row);
  36
  37 #ifdef __cplusplus
  38 }
  39 #endif
  40
  41 /* These globals below are global termcap variables that readline
  42    references.
  43
  44    Actually, depending on preprocessor conditions that we don't want
  45    to mirror here (as they may change depending on readline versions),
  46    readline may define these globals as well, relying on the linker
  47    merging them if needed (-fcommon).  That doesn't work with
  48    -fno-common or C++, so instead we define the symbols as weak.
  49    Don't do this on Windows though, as MinGW gcc 3.4.2 doesn't support
  50    weak (later versions, e.g., 4.8, do support it).  Given this stub
  51    file originally was Windows only, and we only needed this when we
  52    made it work on other hosts, it should be OK.  */
  53 #ifndef __MINGW32__
  54 char PC __attribute__((weak));
  55 char *BC __attribute__((weak));
  56 char *UP __attribute__((weak));
  57 #endif
  58
  59 /* Each of the files below is a minimal implementation of the standard
  60    termcap function with the same name, suitable for use in a Windows
  61    console window, or when a real termcap/curses library isn't
  62    available.  */
  63
  64 int
  65 tgetent (char *buffer, char *termtype)
  66 {
  67   return -1;
  68 }
  69
  70 int
  71 tgetnum (char *name)
  72 {
  73   return -1;
  74 }
  75
  76 int
  77 tgetflag (char *name)
  78 {
  79   return -1;
  80 }
  81
  82 char *
  83 tgetstr (char *name, char **area)
  84 {
  85   return NULL;
  86 }
  87
  88 int
  89 tputs (char *string, int nlines, int (*outfun) (int))
  90 {
  91   while (*string)
  92     outfun (*string++);
  93
  94   return 0;
  95 }
  96
  97 char *
  98 tgoto (const char *cap, int col, int row)
  99 {
 100   return NULL;
 101 }