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cosmopolitan/third_party/ncurses/lib_baudrate.c
Justine Tunney 0ed7309fdb
Add ncurses 6.4
2023-12-10 07:33:37 -08:00

317 lines
7.7 KiB
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/****************************************************************************
* Copyright 2020 Thomas E. Dickey *
* Copyright 1998-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
* lib_baudrate.c
*
*/
#include "curses.priv.h"
#include "termcap.h" /* ospeed */
#if defined(__FreeBSD__) || defined(__OpenBSD__)
#include <sys/param.h>
#endif
/*
* These systems use similar header files, which define B1200 as 1200, etc.,
* but can be overridden by defining USE_OLD_TTY so B1200 is 9, which makes all
* of the indices up to B115200 fit nicely in a 'short', allowing us to retain
* ospeed's type for compatibility.
*/
#if NCURSES_OSPEED_COMPAT && \
((defined(__FreeBSD__) && (__FreeBSD_version < 700000)) || \
defined(__NetBSD__) || \
((defined(__OpenBSD__) && OpenBSD < 201510)) || \
defined(__APPLE__))
#undef B0
#undef B50
#undef B75
#undef B110
#undef B134
#undef B150
#undef B200
#undef B300
#undef B600
#undef B1200
#undef B1800
#undef B2400
#undef B4800
#undef B9600
#undef B19200
#undef EXTA
#undef B38400
#undef EXTB
#undef B57600
#undef B115200
#undef B230400
#undef B460800
#undef B921600
#define USE_OLD_TTY
#include <sys/ttydev.h>
#else
#undef USE_OLD_TTY
#endif /* USE_OLD_TTY */
MODULE_ID("$Id: lib_baudrate.c,v 1.45 2020/09/05 21:15:32 tom Exp $")
/*
* int
* baudrate()
*
* Returns the current terminal's baud rate.
*
*/
struct speed {
int given_speed; /* values for 'ospeed' */
int actual_speed; /* the actual speed */
};
#if !defined(EXP_WIN32_DRIVER)
#define DATA(number) { B##number, number }
static struct speed speeds[] =
{
DATA(0),
DATA(50),
DATA(75),
DATA(110),
DATA(134),
DATA(150),
DATA(200),
DATA(300),
DATA(600),
DATA(1200),
DATA(1800),
DATA(2400),
DATA(4800),
DATA(9600),
#ifdef B19200
DATA(19200),
#elif defined(EXTA)
{EXTA, 19200},
#endif
#ifdef B28800
DATA(28800),
#endif
#ifdef B38400
DATA(38400),
#elif defined(EXTB)
{EXTB, 38400},
#endif
#ifdef B57600
DATA(57600),
#endif
/* ifdef to prevent overflow when OLD_TTY is not available */
#if !(NCURSES_OSPEED_COMPAT && defined(__FreeBSD__) && (__FreeBSD_version > 700000))
#ifdef B76800
DATA(76800),
#endif
#ifdef B115200
DATA(115200),
#endif
#ifdef B153600
DATA(153600),
#endif
#ifdef B230400
DATA(230400),
#endif
#ifdef B307200
DATA(307200),
#endif
#ifdef B460800
DATA(460800),
#endif
#ifdef B500000
DATA(500000),
#endif
#ifdef B576000
DATA(576000),
#endif
#ifdef B921600
DATA(921600),
#endif
#ifdef B1000000
DATA(1000000),
#endif
#ifdef B1152000
DATA(1152000),
#endif
#ifdef B1500000
DATA(1500000),
#endif
#ifdef B2000000
DATA(2000000),
#endif
#ifdef B2500000
DATA(2500000),
#endif
#ifdef B3000000
DATA(3000000),
#endif
#ifdef B3500000
DATA(3500000),
#endif
#ifdef B4000000
DATA(4000000),
#endif
#endif
};
#endif /* !EXP_WIN32_DRIVER */
NCURSES_EXPORT(int)
_nc_baudrate(int OSpeed)
{
#if defined(EXP_WIN32_DRIVER)
/* On Windows this is a noop */
(void) OSpeed;
return (OK);
#else
#if !USE_REENTRANT
static int last_OSpeed;
static int last_baudrate;
#endif
int result = ERR;
if (OSpeed < 0)
OSpeed = (NCURSES_OSPEED) OSpeed;
if (OSpeed < 0)
OSpeed = (unsigned short) OSpeed;
#if !USE_REENTRANT
if (OSpeed == last_OSpeed) {
result = last_baudrate;
}
#endif
if (result == ERR) {
if (OSpeed >= 0) {
unsigned i;
for (i = 0; i < SIZEOF(speeds); i++) {
if (speeds[i].given_speed > OSpeed) {
break;
}
if (speeds[i].given_speed == OSpeed) {
result = speeds[i].actual_speed;
break;
}
}
}
#if !USE_REENTRANT
if (OSpeed != last_OSpeed) {
last_OSpeed = OSpeed;
last_baudrate = result;
}
#endif
}
return (result);
#endif /* !EXP_WIN32_DRIVER */
}
NCURSES_EXPORT(int)
_nc_ospeed(int BaudRate)
{
int result = 1;
#if defined(EXP_WIN32_DRIVER)
(void) BaudRate;
#else
if (BaudRate >= 0) {
unsigned i;
for (i = 0; i < SIZEOF(speeds); i++) {
if (speeds[i].actual_speed == BaudRate) {
result = speeds[i].given_speed;
break;
}
}
}
#endif
return (result);
}
NCURSES_EXPORT(int)
NCURSES_SP_NAME(baudrate) (NCURSES_SP_DCL0)
{
int result;
T((T_CALLED("baudrate(%p)"), (void *) SP_PARM));
#if defined(EXP_WIN32_DRIVER)
result = OK;
#else
/*
* In debugging, allow the environment symbol to override when we're
* redirecting to a file, so we can construct repeatable test-cases
* that take into account costs that depend on baudrate.
*/
#ifdef TRACE
if (IsValidTIScreen(SP_PARM)
&& !NC_ISATTY(fileno((SP_PARM && SP_PARM->_ofp) ? SP_PARM->_ofp : stdout))
&& getenv("BAUDRATE") != 0) {
int ret;
if ((ret = _nc_getenv_num("BAUDRATE")) <= 0)
ret = 9600;
ospeed = (NCURSES_OSPEED) _nc_ospeed(ret);
returnCode(ret);
}
#endif
if (IsValidTIScreen(SP_PARM)) {
#ifdef USE_OLD_TTY
result = (int) cfgetospeed(&(TerminalOf(SP_PARM)->Nttyb));
ospeed = (NCURSES_OSPEED) _nc_ospeed(result);
#else /* !USE_OLD_TTY */
#ifdef TERMIOS
ospeed = (NCURSES_OSPEED) cfgetospeed(&(TerminalOf(SP_PARM)->Nttyb));
#else
ospeed = (NCURSES_OSPEED) TerminalOf(SP_PARM)->Nttyb.sg_ospeed;
#endif
result = _nc_baudrate(ospeed);
#endif
TerminalOf(SP_PARM)->_baudrate = result;
} else {
result = ERR;
}
#endif /* !EXP_WIN32_DRIVER */
returnCode(result);
}
#if NCURSES_SP_FUNCS
NCURSES_EXPORT(int)
baudrate(void)
{
return NCURSES_SP_NAME(baudrate) (CURRENT_SCREEN);
}
#endif
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