gcc/m2/pge-boot/GStdIO.h

   1 /* do not edit automatically generated by mc from StdIO.  */
   2 /* StdIO.def provides general Read and Write procedures.
   3
   4 Copyright (C) 2001-2023 Free Software Foundation, Inc.
   5 Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
   6
   7 This file is part of GNU Modula-2.
   8
   9 GNU Modula-2 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, or (at your option)
  12 any later version.
  13
  14 GNU Modula-2 is distributed in the hope that it will be useful, but
  15 WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17 General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28
  29 #if !defined (_StdIO_H)
  30 #   define _StdIO_H
  31
  32 #include "config.h"
  33 #include "system.h"
  34 #   ifdef __cplusplus
  35 extern "C" {
  36 #   endif
  37 #   if !defined (PROC_D)
  38 #      define PROC_D
  39        typedef void (*PROC_t) (void);
  40        typedef struct { PROC_t proc; } PROC;
  41 #   endif
  42
  43
  44 #   if defined (_StdIO_C)
  45 #      define EXTERN
  46 #   else
  47 #      define EXTERN extern
  48 #   endif
  49
  50 typedef struct StdIO_ProcWrite_p StdIO_ProcWrite;
  51
  52 typedef struct StdIO_ProcRead_p StdIO_ProcRead;
  53
  54 typedef void (*StdIO_ProcWrite_t) (char);
  55 struct StdIO_ProcWrite_p { StdIO_ProcWrite_t proc; };
  56
  57 typedef void (*StdIO_ProcRead_t) (char *);
  58 struct StdIO_ProcRead_p { StdIO_ProcRead_t proc; };
  59
  60
  61 /*
  62    Read - is the generic procedure that all higher application layers
  63           should use to receive a character.
  64 */
  65
  66 EXTERN void StdIO_Read (char *ch);
  67
  68 /*
  69    Write - is the generic procedure that all higher application layers
  70            should use to emit a character.
  71 */
  72
  73 EXTERN void StdIO_Write (char ch);
  74
  75 /*
  76    PushOutput - pushes the current Write procedure onto a stack,
  77                 any future references to Write will actually invoke
  78                 procedure, p.
  79 */
  80
  81 EXTERN void StdIO_PushOutput (StdIO_ProcWrite p);
  82
  83 /*
  84    PopOutput - restores Write to use the previous output procedure.
  85 */
  86
  87 EXTERN void StdIO_PopOutput (void);
  88
  89 /*
  90    GetCurrentOutput - returns the current output procedure.
  91 */
  92
  93 EXTERN StdIO_ProcWrite StdIO_GetCurrentOutput (void);
  94
  95 /*
  96    PushInput - pushes the current Read procedure onto a stack,
  97                any future references to Read will actually invoke
  98                procedure, p.
  99 */
 100
 101 EXTERN void StdIO_PushInput (StdIO_ProcRead p);
 102
 103 /*
 104    PopInput - restores Write to use the previous output procedure.
 105 */
 106
 107 EXTERN void StdIO_PopInput (void);
 108
 109 /*
 110    GetCurrentInput - returns the current input procedure.
 111 */
 112
 113 EXTERN StdIO_ProcRead StdIO_GetCurrentInput (void);
 114 #   ifdef __cplusplus
 115 }
 116 #   endif
 117
 118 #   undef EXTERN
 119 #endif