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freebsd-dev/games/morse/morse.c
Ed Schouten 3b9fe1e175 Add static keywords to variables and functions where possible in games/. 
This allows us to detect unused functions and variables and allows the
compiler to do a better job at optimisation.
2011-11-05 07:18:53 +00:00

585 lines
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/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Taught to send *real* morse by Lyndon Nerenberg (VE6BBM)
* <lyndon@orthanc.ca>
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)morse.c 8.1 (Berkeley) 5/31/93";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/time.h>
#include <ctype.h>
#include <fcntl.h>
#include <langinfo.h>
#include <locale.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
/* Always use the speaker, let the open fail if -p is selected */
#define SPEAKER "/dev/speaker"
#ifdef SPEAKER
#include <dev/speaker/speaker.h>
#endif
struct morsetab {
const char inchar;
const char *morse;
};
static const struct morsetab mtab[] = {
/* letters */
{'a', ".-"},
{'b', "-..."},
{'c', "-.-."},
{'d', "-.."},
{'e', "."},
{'f', "..-."},
{'g', "--."},
{'h', "...."},
{'i', ".."},
{'j', ".---"},
{'k', "-.-"},
{'l', ".-.."},
{'m', "--"},
{'n', "-."},
{'o', "---"},
{'p', ".--."},
{'q', "--.-"},
{'r', ".-."},
{'s', "..."},
{'t', "-"},
{'u', "..-"},
{'v', "...-"},
{'w', ".--"},
{'x', "-..-"},
{'y', "-.--"},
{'z', "--.."},
/* digits */
{'0', "-----"},
{'1', ".----"},
{'2', "..---"},
{'3', "...--"},
{'4', "....-"},
{'5', "....."},
{'6', "-...."},
{'7', "--..."},
{'8', "---.."},
{'9', "----."},
/* punctuation */
{',', "--..--"},
{'.', ".-.-.-"},
{'"', ".-..-."},
{'!', "..--."},
{'?', "..--.."},
{'/', "-..-."},
{'-', "-....-"},
{'=', "-...-"}, /* BT */
{':', "---..."},
{';', "-.-.-."},
{'(', "-.--."}, /* KN */
{')', "-.--.-"},
{'$', "...-..-"},
{'+', ".-.-."}, /* AR */
{'@', ".--.-."}, /* AC */
/* prosigns without already assigned values */
{'#', ".-..."}, /* AS */
{'&', "...-.-"}, /* SK */
{'*', "...-."}, /* VE */
{'%', "-...-.-"}, /* BK */
{'\0', ""}
};
static const struct morsetab iso8859_1tab[] = {
{'<EFBFBD>', ".--.-"},
{'<EFBFBD>', ".--.-"},
{'<EFBFBD>', ".--.-"},
{'<EFBFBD>', ".-.-"},
{'<EFBFBD>', "-.-.."},
{'<EFBFBD>', "..-.."},
{'<EFBFBD>', "..-.."},
{'<EFBFBD>', "-..-."},
{'<EFBFBD>', "---."},
{'<EFBFBD>', "..--"},
{'\0', ""}
};
static const struct morsetab iso8859_7tab[] = {
/*
* The Greek alphabet; you'll need an ISO8859-7 font in order
* to see the actual characters.
* This table does not implement:
* - the special sequences for the seven diphthongs,
* - the punctuation differences.
* Implementing these features would introduce too many
* special-cases in the program's main loop.
* The diphthong sequences are:
* alpha iota .-.-
* alpha upsilon ..--
* epsilon upsilon ---.
* eta upsilon ...-
* omicron iota ---..
* omicron upsilon ..-
* upsilon iota .---
* The different punctuation symbols are:
* ; ..-.-
* ! --..--
*/
{'<EFBFBD>', ".-"}, /* alpha */
{'<EFBFBD>', ".-"}, /* alpha with acute */
{'<EFBFBD>', "-..."}, /* beta */
{'<EFBFBD>', "--."}, /* gamma */
{'<EFBFBD>', "-.."}, /* delta */
{'<EFBFBD>', "."}, /* epsilon */
{'<EFBFBD>', "."}, /* epsilon with acute */
{'<EFBFBD>', "--.."}, /* zeta */
{'<EFBFBD>', "...."}, /* eta */
{'<EFBFBD>', "...."}, /* eta with acute */
{'<EFBFBD>', "-.-."}, /* theta */
{'<EFBFBD>', ".."}, /* iota */
{'<EFBFBD>', ".."}, /* iota with acute */
{'<EFBFBD>', ".."}, /* iota with diaeresis */
{'<EFBFBD>', ".."}, /* iota with acute and diaeresis */
{'<EFBFBD>', "-.-"}, /* kappa */
{'<EFBFBD>', ".-.."}, /* lambda */
{'<EFBFBD>', "--"}, /* mu */
{'<EFBFBD>', "-."}, /* nu */
{'<EFBFBD>', "-..-"}, /* xi */
{'<EFBFBD>', "---"}, /* omicron */
{'<EFBFBD>', "---"}, /* omicron with acute */
{'<EFBFBD>', ".--."}, /* pi */
{'<EFBFBD>', ".-."}, /* rho */
{'<EFBFBD>', "..."}, /* sigma */
{'<EFBFBD>', "..."}, /* final sigma */
{'<EFBFBD>', "-"}, /* tau */
{'<EFBFBD>', "-.--"}, /* upsilon */
{'<EFBFBD>', "-.--"}, /* upsilon with acute */
{'<EFBFBD>', "-.--"}, /* upsilon and diaeresis */
{'<EFBFBD>', "-.--"}, /* upsilon with acute and diaeresis */
{'<EFBFBD>', "..-."}, /* phi */
{'<EFBFBD>', "----"}, /* chi */
{'<EFBFBD>', "--.-"}, /* psi */
{'<EFBFBD>', ".--"}, /* omega */
{'<EFBFBD>', ".--"}, /* omega with acute */
{'\0', ""}
};
static const struct morsetab koi8rtab[] = {
/*
* The Cyrillic alphabet; you'll need a KOI8-R font in order
* to see the actual characters
*/
{'<EFBFBD>', ".-"}, /* a */
{'<EFBFBD>', "-..."}, /* be */
{'<EFBFBD>', ".--"}, /* ve */
{'<EFBFBD>', "--."}, /* ge */
{'<EFBFBD>', "-.."}, /* de */
{'<EFBFBD>', "."}, /* ye */
{'<EFBFBD>', "."}, /* yo, the same as ye */
{'<EFBFBD>', "...-"}, /* she */
{'<EFBFBD>', "--.."}, /* ze */
{'<EFBFBD>', ".."}, /* i */
{'<EFBFBD>', ".---"}, /* i kratkoye */
{'<EFBFBD>', "-.-"}, /* ka */
{'<EFBFBD>', ".-.."}, /* el */
{'<EFBFBD>', "--"}, /* em */
{'<EFBFBD>', "-."}, /* en */
{'<EFBFBD>', "---"}, /* o */
{'<EFBFBD>', ".--."}, /* pe */
{'<EFBFBD>', ".-."}, /* er */
{'<EFBFBD>', "..."}, /* es */
{'<EFBFBD>', "-"}, /* te */
{'<EFBFBD>', "..-"}, /* u */
{'<EFBFBD>', "..-."}, /* ef */
{'<EFBFBD>', "...."}, /* kha */
{'<EFBFBD>', "-.-."}, /* ce */
{'<EFBFBD>', "---."}, /* che */
{'<EFBFBD>', "----"}, /* sha */
{'<EFBFBD>', "--.-"}, /* shcha */
{'<EFBFBD>', "-.--"}, /* yi */
{'<EFBFBD>', "-..-"}, /* myakhkij znak */
{'<EFBFBD>', "..-.."}, /* ae */
{'<EFBFBD>', "..--"}, /* yu */
{'<EFBFBD>', ".-.-"}, /* ya */
{'\0', ""}
};
static void show(const char *), play(const char *), morse(char);
static void ttyout(const char *);
static void sighandler(int);
#define GETOPTOPTS "c:d:ef:lsw:"
#define USAGE \
"usage: morse [-els] [-d device] [-w speed] [-c speed] [-f frequency] [string ...]\n"
static int pflag, lflag, sflag, eflag;
static int wpm = 20; /* effective words per minute */
static int cpm; /* effective words per minute between
* characters */
#define FREQUENCY 600
static int freq = FREQUENCY;
static char *device; /* for tty-controlled generator */
#define DASH_LEN 3
#define CHAR_SPACE 3
#define WORD_SPACE (7 - CHAR_SPACE - 1)
static float dot_clock;
static float cdot_clock;
static int spkr, line;
static struct termios otty, ntty;
static int olflags;
#ifdef SPEAKER
static tone_t sound;
#undef GETOPTOPTS
#define GETOPTOPTS "c:d:ef:lpsw:"
#undef USAGE
#define USAGE \
"usage: morse [-elps] [-d device] [-w speed] [-c speed] [-f frequency] [string ...]\n"
#endif
static const struct morsetab *hightab;
int
main(int argc, char **argv)
{
int ch, lflags;
char *p, *codeset;
while ((ch = getopt(argc, argv, GETOPTOPTS)) != -1)
switch ((char) ch) {
case 'c':
cpm = atoi(optarg);
break;
case 'd':
device = optarg;
break;
case 'e':
eflag = 1;
setvbuf(stdout, 0, _IONBF, 0);
break;
case 'f':
freq = atoi(optarg);
break;
case 'l':
lflag = 1;
break;
#ifdef SPEAKER
case 'p':
pflag = 1;
break;
#endif
case 's':
sflag = 1;
break;
case 'w':
wpm = atoi(optarg);
break;
case '?':
default:
fputs(USAGE, stderr);
exit(1);
}
if (sflag && lflag) {
fputs("morse: only one of -l and -s allowed\n", stderr);
exit(1);
}
if ((pflag || device) && (sflag || lflag)) {
fputs("morse: only one of -p, -d and -l, -s allowed\n", stderr);
exit(1);
}
if (cpm == 0)
cpm = wpm;
if ((pflag || device) && ((wpm < 1) || (wpm > 60) || (cpm < 1) || (cpm > 60))) {
fputs("morse: insane speed\n", stderr);
exit(1);
}
if ((pflag || device) && (freq == 0))
freq = FREQUENCY;
#ifdef SPEAKER
if (pflag) {
if ((spkr = open(SPEAKER, O_WRONLY, 0)) == -1) {
perror(SPEAKER);
exit(1);
}
} else
#endif
if (device) {
if ((line = open(device, O_WRONLY | O_NONBLOCK)) == -1) {
perror("open tty line");
exit(1);
}
if (tcgetattr(line, &otty) == -1) {
perror("tcgetattr() failed");
exit(1);
}
ntty = otty;
ntty.c_cflag |= CLOCAL;
tcsetattr(line, TCSANOW, &ntty);
lflags = fcntl(line, F_GETFL);
lflags &= ~O_NONBLOCK;
fcntl(line, F_SETFL, &lflags);
ioctl(line, TIOCMGET, &lflags);
lflags &= ~TIOCM_RTS;
olflags = lflags;
ioctl(line, TIOCMSET, &lflags);
(void)signal(SIGHUP, sighandler);
(void)signal(SIGINT, sighandler);
(void)signal(SIGQUIT, sighandler);
(void)signal(SIGTERM, sighandler);
}
if (pflag || device) {
dot_clock = wpm / 2.4; /* dots/sec */
dot_clock = 1 / dot_clock; /* duration of a dot */
dot_clock = dot_clock / 2; /* dot_clock runs at twice */
/* the dot rate */
dot_clock = dot_clock * 100; /* scale for ioctl */
cdot_clock = cpm / 2.4; /* dots/sec */
cdot_clock = 1 / cdot_clock; /* duration of a dot */
cdot_clock = cdot_clock / 2; /* dot_clock runs at twice */
/* the dot rate */
cdot_clock = cdot_clock * 100; /* scale for ioctl */
}
argc -= optind;
argv += optind;
if (setlocale(LC_CTYPE, "") != NULL &&
*(codeset = nl_langinfo(CODESET)) != '\0') {
if (strcmp(codeset, "KOI8-R") == 0)
hightab = koi8rtab;
else if (strcmp(codeset, "ISO8859-1") == 0 ||
strcmp(codeset, "ISO8859-15") == 0)
hightab = iso8859_1tab;
else if (strcmp(codeset, "ISO8859-7") == 0)
hightab = iso8859_7tab;
}
if (lflag)
printf("m");
if (*argv) {
do {
for (p = *argv; *p; ++p) {
if (eflag)
putchar(*p);
morse(*p);
}
if (eflag)
putchar(' ');
morse(' ');
} while (*++argv);
} else {
while ((ch = getchar()) != EOF) {
if (eflag)
putchar(ch);
morse(ch);
}
}
if (device)
tcsetattr(line, TCSANOW, &otty);
exit(0);
}
static void
morse(char c)
{
const struct morsetab *m;
if (isalpha((unsigned char)c))
c = tolower((unsigned char)c);
if ((c == '\r') || (c == '\n'))
c = ' ';
if (c == ' ') {
if (pflag)
play(" ");
else if (device)
ttyout(" ");
else if (lflag)
printf("\n");
else
show("");
return;
}
for (m = ((unsigned char)c < 0x80? mtab: hightab);
m != NULL && m->inchar != '\0';
m++) {
if (m->inchar == c) {
if (pflag) {
play(m->morse);
} else if (device) {
ttyout(m->morse);
} else
show(m->morse);
}
}
}
static void
show(const char *s)
{
if (lflag) {
printf("%s ", s);
} else if (sflag) {
printf(" %s\n", s);
} else {
for (; *s; ++s)
printf(" %s", *s == '.' ? *(s + 1) == '\0' ? "dit" :
"di" : "dah");
printf("\n");
}
}
static void
play(const char *s)
{
#ifdef SPEAKER
const char *c;
for (c = s; *c != '\0'; c++) {
switch (*c) {
case '.':
sound.frequency = freq;
sound.duration = dot_clock;
break;
case '-':
sound.frequency = freq;
sound.duration = dot_clock * DASH_LEN;
break;
case ' ':
sound.frequency = 0;
sound.duration = cdot_clock * WORD_SPACE;
break;
default:
sound.duration = 0;
}
if (sound.duration) {
if (ioctl(spkr, SPKRTONE, &sound) == -1) {
perror("ioctl play");
exit(1);
}
}
sound.frequency = 0;
sound.duration = dot_clock;
if (ioctl(spkr, SPKRTONE, &sound) == -1) {
perror("ioctl rest");
exit(1);
}
}
sound.frequency = 0;
sound.duration = cdot_clock * CHAR_SPACE;
ioctl(spkr, SPKRTONE, &sound);
#endif
}
static void
ttyout(const char *s)
{
const char *c;
int duration, on, lflags;
for (c = s; *c != '\0'; c++) {
switch (*c) {
case '.':
on = 1;
duration = dot_clock;
break;
case '-':
on = 1;
duration = dot_clock * DASH_LEN;
break;
case ' ':
on = 0;
duration = cdot_clock * WORD_SPACE;
break;
default:
on = 0;
duration = 0;
}
if (on) {
ioctl(line, TIOCMGET, &lflags);
lflags |= TIOCM_RTS;
ioctl(line, TIOCMSET, &lflags);
}
duration *= 10000;
if (duration)
usleep(duration);
ioctl(line, TIOCMGET, &lflags);
lflags &= ~TIOCM_RTS;
ioctl(line, TIOCMSET, &lflags);
duration = dot_clock * 10000;
usleep(duration);
}
duration = cdot_clock * CHAR_SPACE * 10000;
usleep(duration);
}
static void
sighandler(int signo)
{
ioctl(line, TIOCMSET, &olflags);
tcsetattr(line, TCSANOW, &otty);
signal(signo, SIG_DFL);
(void)kill(getpid(), signo);
}
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