/* do not edit automatically generated by mc from IO. */
/* IO.mod provides Read, Write, Errors procedures mapping onto 0, 1 and 2.
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"
#include <stdbool.h>
# if !defined (PROC_D)
# define PROC_D
typedef void (*PROC_t) (void);
typedef struct { PROC_t proc; } PROC;
# endif
# if !defined (TRUE)
# define TRUE (1==1)
# endif
# if !defined (FALSE)
# define FALSE (1==0)
# endif
#define _IO_H
#define _IO_C
# include "GStrLib.h"
# include "GSYSTEM.h"
# include "Glibc.h"
# include "GFIO.h"
# include "Gerrno.h"
# include "GASCII.h"
# include "Gtermios.h"
# define MaxDefaultFd 2
typedef struct IO_BasicFds_r IO_BasicFds;
typedef struct IO__T1_a IO__T1;
struct IO_BasicFds_r {
bool IsEof;
bool IsRaw;
};
struct IO__T1_a { IO_BasicFds array[MaxDefaultFd+1]; };
static IO__T1 fdState;
/*
IsDefaultFd - returns TRUE if, fd, is 0, 1 or 2.
*/
extern "C" void IO_Read (char *ch);
/*
doWrite - performs the write of a single character, ch,
onto fd or f.
*/
extern "C" void IO_Write (char ch);
/*
doWrite - performs the write of a single character, ch,
onto fd or f.
*/
extern "C" void IO_Error (char ch);
extern "C" void IO_UnBufferedMode (int fd, bool input);
extern "C" void IO_BufferedMode (int fd, bool input);
/*
EchoOn - turns on echoing for file descriptor, fd. This
only really makes sence for a file descriptor opened
for terminal input or maybe some specific file descriptor
which is attached to a particular piece of hardware.
*/
extern "C" void IO_EchoOn (int fd, bool input);
/*
EchoOff - turns off echoing for file descriptor, fd. This
only really makes sence for a file descriptor opened
for terminal input or maybe some specific file descriptor
which is attached to a particular piece of hardware.
*/
extern "C" void IO_EchoOff (int fd, bool input);
/*
IsDefaultFd - returns TRUE if, fd, is 0, 1 or 2.
*/
static bool IsDefaultFd (int fd);
/*
doWrite - performs the write of a single character, ch,
onto fd or f.
*/
static void doWrite (int fd, FIO_File f, char ch);
/*
setFlag - sets or unsets the appropriate flag in, t.
*/
static void setFlag (termios_TERMIOS t, termios_Flag f, bool b);
/*
doraw - sets all the flags associated with making this
file descriptor into raw input/output.
*/
static void doraw (termios_TERMIOS term);
/*
dononraw - sets all the flags associated with making this
file descriptor into non raw input/output.
*/
static void dononraw (termios_TERMIOS term);
/*
Init -
*/
static void Init (void);
/*
IsDefaultFd - returns TRUE if, fd, is 0, 1 or 2.
*/
static bool IsDefaultFd (int fd)
{
return (fd <= MaxDefaultFd) && (fd >= 0);
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
doWrite - performs the write of a single character, ch,
onto fd or f.
*/
static void doWrite (int fd, FIO_File f, char ch)
{
int r;
if (fdState.array[fd].IsRaw)
{
/* avoid dangling else. */
if (! fdState.array[fd].IsEof)
{
for (;;)
{
r = static_cast<int> (libc_write (FIO_GetUnixFileDescriptor (f), &ch, static_cast<size_t> (1)));
if (r == 1)
{
return ;
}
else if (r == -1)
{
/* avoid dangling else. */
r = errno_geterrno ();
if ((r != errno_EAGAIN) && (r != errno_EINTR))
{
fdState.array[fd].IsEof = true;
return ;
}
}
}
}
}
else
{
FIO_WriteChar (f, ch);
}
}
/*
setFlag - sets or unsets the appropriate flag in, t.
*/
static void setFlag (termios_TERMIOS t, termios_Flag f, bool b)
{
if (termios_SetFlag (t, f, b))
{} /* empty. */
}
/*
doraw - sets all the flags associated with making this
file descriptor into raw input/output.
*/
static void doraw (termios_TERMIOS term)
{
/*
* from man 3 termios
* termios_p->c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
* | INLCR | IGNCR | ICRNL | IXON);
* termios_p->c_oflag &= ~OPOST;
* termios_p->c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
* termios_p->c_cflag &= ~(CSIZE | PARENB);
* termios_p->c_cflag |= CS8;
*/
setFlag (term, termios_ignbrk, false);
setFlag (term, termios_ibrkint, false);
setFlag (term, termios_iparmrk, false);
setFlag (term, termios_istrip, false);
setFlag (term, termios_inlcr, false);
setFlag (term, termios_igncr, false);
setFlag (term, termios_icrnl, false);
setFlag (term, termios_ixon, false);
setFlag (term, termios_opost, false);
setFlag (term, termios_lecho, false);
setFlag (term, termios_lechonl, false);
setFlag (term, termios_licanon, false);
setFlag (term, termios_lisig, false);
setFlag (term, termios_liexten, false);
setFlag (term, termios_parenb, false);
setFlag (term, termios_cs8, true);
}
/*
dononraw - sets all the flags associated with making this
file descriptor into non raw input/output.
*/
static void dononraw (termios_TERMIOS term)
{
/*
* we undo these settings, (although we leave the character size alone)
*
* from man 3 termios
* termios_p->c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
* | INLCR | IGNCR | ICRNL | IXON);
* termios_p->c_oflag &= ~OPOST;
* termios_p->c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
* termios_p->c_cflag &= ~(CSIZE | PARENB);
* termios_p->c_cflag |= CS8;
*/
setFlag (term, termios_ignbrk, true);
setFlag (term, termios_ibrkint, true);
setFlag (term, termios_iparmrk, true);
setFlag (term, termios_istrip, true);
setFlag (term, termios_inlcr, true);
setFlag (term, termios_igncr, true);
setFlag (term, termios_icrnl, true);
setFlag (term, termios_ixon, true);
setFlag (term, termios_opost, true);
setFlag (term, termios_lecho, true);
setFlag (term, termios_lechonl, true);
setFlag (term, termios_licanon, true);
setFlag (term, termios_lisig, true);
setFlag (term, termios_liexten, true);
}
/*
Init -
*/
static void Init (void)
{
fdState.array[0].IsEof = false;
fdState.array[0].IsRaw = false;
fdState.array[1].IsEof = false;
fdState.array[1].IsRaw = false;
fdState.array[2].IsEof = false;
fdState.array[2].IsRaw = false;
}
/*
IsDefaultFd - returns TRUE if, fd, is 0, 1 or 2.
*/
extern "C" void IO_Read (char *ch)
{
int r;
FIO_FlushBuffer (FIO_StdOut);
FIO_FlushBuffer (FIO_StdErr);
if (fdState.array[0].IsRaw)
{
if (fdState.array[0].IsEof)
{
(*ch) = ASCII_eof;
}
else
{
for (;;)
{
r = static_cast<int> (libc_read (FIO_GetUnixFileDescriptor (FIO_StdIn), ch, static_cast<size_t> (1)));
if (r == 1)
{
return ;
}
else if (r == -1)
{
/* avoid dangling else. */
r = errno_geterrno ();
if (r != errno_EAGAIN)
{
fdState.array[0].IsEof = true;
(*ch) = ASCII_eof;
return ;
}
}
}
}
}
else
{
(*ch) = FIO_ReadChar (FIO_StdIn);
}
}
/*
doWrite - performs the write of a single character, ch,
onto fd or f.
*/
extern "C" void IO_Write (char ch)
{
doWrite (1, FIO_StdOut, ch);
}
/*
doWrite - performs the write of a single character, ch,
onto fd or f.
*/
extern "C" void IO_Error (char ch)
{
doWrite (2, FIO_StdErr, ch);
}
extern "C" void IO_UnBufferedMode (int fd, bool input)
{
termios_TERMIOS term;
int result;
if (IsDefaultFd (fd))
{
fdState.array[fd].IsRaw = true;
}
term = termios_InitTermios ();
if ((termios_tcgetattr (fd, term)) == 0)
{
doraw (term);
if (input)
{
result = termios_tcsetattr (fd, termios_tcsflush (), term);
}
else
{
result = termios_tcsetattr (fd, termios_tcsdrain (), term);
}
}
term = termios_KillTermios (term);
}
extern "C" void IO_BufferedMode (int fd, bool input)
{
termios_TERMIOS term;
int r;
if (IsDefaultFd (fd))
{
fdState.array[fd].IsRaw = false;
}
term = termios_InitTermios ();
if ((termios_tcgetattr (fd, term)) == 0)
{
dononraw (term);
if (input)
{
r = termios_tcsetattr (fd, termios_tcsflush (), term);
}
else
{
r = termios_tcsetattr (fd, termios_tcsdrain (), term);
}
}
term = termios_KillTermios (term);
}
/*
EchoOn - turns on echoing for file descriptor, fd. This
only really makes sence for a file descriptor opened
for terminal input or maybe some specific file descriptor
which is attached to a particular piece of hardware.
*/
extern "C" void IO_EchoOn (int fd, bool input)
{
termios_TERMIOS term;
int result;
term = termios_InitTermios ();
if ((termios_tcgetattr (fd, term)) == 0)
{
setFlag (term, termios_lecho, true);
if (input)
{
result = termios_tcsetattr (fd, termios_tcsflush (), term);
}
else
{
result = termios_tcsetattr (fd, termios_tcsdrain (), term);
}
}
term = termios_KillTermios (term);
}
/*
EchoOff - turns off echoing for file descriptor, fd. This
only really makes sence for a file descriptor opened
for terminal input or maybe some specific file descriptor
which is attached to a particular piece of hardware.
*/
extern "C" void IO_EchoOff (int fd, bool input)
{
termios_TERMIOS term;
int result;
term = termios_InitTermios ();
if ((termios_tcgetattr (fd, term)) == 0)
{
setFlag (term, termios_lecho, false);
if (input)
{
result = termios_tcsetattr (fd, termios_tcsflush (), term);
}
else
{
result = termios_tcsetattr (fd, termios_tcsdrain (), term);
}
}
term = termios_KillTermios (term);
}
extern "C" void _M2_IO_init (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
Init ();
}
extern "C" void _M2_IO_fini (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
}