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/* do not edit automatically generated by mc from StdIO. */
/* StdIO.mod provides general Read and Write procedures.
Copyright (C) 2001-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
# if !defined (PROC_D)
# define PROC_D
typedef void (*PROC_t) (void);
typedef struct { PROC_t proc; } PROC;
# endif
# include "Gmcrts.h"
#define _StdIO_H
#define _StdIO_C
# include "GIO.h"
# include "GM2RTS.h"
typedef struct StdIO_ProcWrite_p StdIO_ProcWrite;
typedef struct StdIO_ProcRead_p StdIO_ProcRead;
# define MaxStack 40
typedef struct StdIO__T1_a StdIO__T1;
typedef struct StdIO__T2_a StdIO__T2;
typedef void (*StdIO_ProcWrite_t) (char);
struct StdIO_ProcWrite_p { StdIO_ProcWrite_t proc; };
typedef void (*StdIO_ProcRead_t) (char *);
struct StdIO_ProcRead_p { StdIO_ProcRead_t proc; };
struct StdIO__T1_a { StdIO_ProcWrite array[MaxStack+1]; };
struct StdIO__T2_a { StdIO_ProcRead array[MaxStack+1]; };
static StdIO__T1 StackW;
static unsigned int StackWPtr;
static StdIO__T2 StackR;
static unsigned int StackRPtr;
/*
Read - is the generic procedure that all higher application layers
should use to receive a character.
*/
extern "C" void StdIO_Read (char *ch);
/*
Write - is the generic procedure that all higher application layers
should use to emit a character.
*/
extern "C" void StdIO_Write (char ch);
/*
PushOutput - pushes the current Write procedure onto a stack,
any future references to Write will actually invoke
procedure, p.
*/
extern "C" void StdIO_PushOutput (StdIO_ProcWrite p);
/*
PopOutput - restores Write to use the previous output procedure.
*/
extern "C" void StdIO_PopOutput (void);
/*
GetCurrentOutput - returns the current output procedure.
*/
extern "C" StdIO_ProcWrite StdIO_GetCurrentOutput (void);
/*
PushInput - pushes the current Read procedure onto a stack,
any future references to Read will actually invoke
procedure, p.
*/
extern "C" void StdIO_PushInput (StdIO_ProcRead p);
/*
PopInput - restores Write to use the previous output procedure.
*/
extern "C" void StdIO_PopInput (void);
/*
GetCurrentInput - returns the current input procedure.
*/
extern "C" StdIO_ProcRead StdIO_GetCurrentInput (void);
/*
Read - is the generic procedure that all higher application layers
should use to receive a character.
*/
extern "C" void StdIO_Read (char *ch)
{
(*StackR.array[StackRPtr].proc) (ch);
}
/*
Write - is the generic procedure that all higher application layers
should use to emit a character.
*/
extern "C" void StdIO_Write (char ch)
{
(*StackW.array[StackWPtr].proc) (ch);
}
/*
PushOutput - pushes the current Write procedure onto a stack,
any future references to Write will actually invoke
procedure, p.
*/
extern "C" void StdIO_PushOutput (StdIO_ProcWrite p)
{
if (StackWPtr == MaxStack)
{
M2RTS_HALT (-1);
__builtin_unreachable ();
}
else
{
StackWPtr += 1;
StackW.array[StackWPtr] = p;
}
}
/*
PopOutput - restores Write to use the previous output procedure.
*/
extern "C" void StdIO_PopOutput (void)
{
if (StackWPtr == 1)
{
M2RTS_HALT (-1);
__builtin_unreachable ();
}
else
{
StackWPtr -= 1;
}
}
/*
GetCurrentOutput - returns the current output procedure.
*/
extern "C" StdIO_ProcWrite StdIO_GetCurrentOutput (void)
{
if (StackWPtr > 0)
{
return StackW.array[StackWPtr];
}
else
{
M2RTS_HALT (-1);
__builtin_unreachable ();
}
ReturnException ("../../gcc/m2/gm2-libs/StdIO.def", 25, 1);
__builtin_unreachable ();
}
/*
PushInput - pushes the current Read procedure onto a stack,
any future references to Read will actually invoke
procedure, p.
*/
extern "C" void StdIO_PushInput (StdIO_ProcRead p)
{
if (StackRPtr == MaxStack)
{
M2RTS_HALT (-1);
__builtin_unreachable ();
}
else
{
StackRPtr += 1;
StackR.array[StackRPtr] = p;
}
}
/*
PopInput - restores Write to use the previous output procedure.
*/
extern "C" void StdIO_PopInput (void)
{
if (StackRPtr == 1)
{
M2RTS_HALT (-1);
__builtin_unreachable ();
}
else
{
StackRPtr -= 1;
}
}
/*
GetCurrentInput - returns the current input procedure.
*/
extern "C" StdIO_ProcRead StdIO_GetCurrentInput (void)
{
if (StackRPtr > 0)
{
return StackR.array[StackRPtr];
}
else
{
M2RTS_HALT (-1);
__builtin_unreachable ();
}
ReturnException ("../../gcc/m2/gm2-libs/StdIO.def", 25, 1);
__builtin_unreachable ();
}
extern "C" void _M2_StdIO_init (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
StackWPtr = 0;
StackRPtr = 0;
StdIO_PushOutput ((StdIO_ProcWrite) {(StdIO_ProcWrite_t) IO_Write});
StdIO_PushInput ((StdIO_ProcRead) {(StdIO_ProcRead_t) IO_Read});
}
extern "C" void _M2_StdIO_fini (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
}
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