modules/shadow.c

   1 /* GNU m4 -- A simple macro processor
   2    Copyright (C) 1999-2000, 2006-2008, 2010, 2013 Free Software
   3    Foundation, Inc.
   4
   5    This file is part of GNU M4.
   6
   7    GNU M4 is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    GNU M4 is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include <config.h>
  22
  23 /* Build using only the exported interfaces, unless NDEBUG is set, in
  24    which case use private symbols to speed things up as much as possible.  */
  25 #ifndef NDEBUG
  26 #  include <m4/m4module.h>
  27 #else
  28 #  include "m4private.h"
  29 #endif
  30
  31 /* Rename exported symbols for dlpreload()ing.  */
  32 #define m4_builtin_table        shadow_LTX_m4_builtin_table
  33 #define m4_macro_table          shadow_LTX_m4_macro_table
  34
  35 /*         function     macros  blind   side    minargs maxargs */
  36 #define builtin_functions                       \
  37   BUILTIN (shadow,      false,  false,  false,  0,      -1 )    \
  38   BUILTIN (test,        false,  false,  false,  0,      -1 )    \
  39
  40
  41 #define BUILTIN(handler, macros, blind, side, min, max) M4BUILTIN (handler)
  42   builtin_functions
  43 #undef BUILTIN
  44
  45 const m4_builtin m4_builtin_table[] =
  46 {
  47 #define BUILTIN(handler, macros, blind, side, min, max)                 \
  48   M4BUILTIN_ENTRY (handler, #handler, macros, blind, side, min, max)
  49
  50   builtin_functions
  51 #undef BUILTIN
  52
  53   { NULL, NULL, 0, 0, 0 },
  54 };
  55
  56 const m4_macro m4_macro_table[] =
  57 {
  58   /* name               text            min     max */
  59   { "__test__",         "`shadow'",     0,      0 },
  60   { NULL,               NULL,           0,      0 },
  61 };
  62
  63
  64 \f
  65 M4INIT_HANDLER (shadow)
  66 {
  67   static bool loaded = false;
  68
  69   const char *s = "Shadow module loaded.";
  70
  71   /* Only display the message on first load.  */
  72   if (obs && !loaded)
  73     {
  74       loaded = true;
  75       obstack_grow (obs, s, strlen (s));
  76     }
  77 }
  78
  79
  80 \f
  81 /**
  82  * shadow()
  83  **/
  84 M4BUILTIN_HANDLER (shadow)
  85 {
  86   const char *s = "Shadow::`shadow' called.";
  87   obstack_grow (obs, s, strlen (s));
  88 }
  89
  90 /**
  91  * test()
  92  **/
  93 M4BUILTIN_HANDLER (test)
  94 {
  95   const char *s = "Shadow::`test' called.";
  96   obstack_grow (obs, s, strlen (s));
  97 }