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/*
* File: rsys.r
* Contents: getstrg, host, longread, putstr
*/
/*
* getstrg - read a line into buf from file fbp. At most maxi characters
* are read. getstrg returns the length of the line, not counting the
* newline. Returns -1 if EOF and -2 if length was limited by maxi.
* Discards \r before \n in translated mode. [[ Needs ferror() check. ]]
*/
int getstrg(buf, maxi, fbp)
register char *buf;
int maxi;
struct b_file *fbp;
{
register int c, l;
FILE *fd;
fd = fbp->fd;
#ifdef XWindows
if (isatty(fileno(fd))) wflushall();
#endif /* XWindows */
l = 0;
while (1) {
#ifdef Graphics
/* insert non-blocking read/code to service windows here */
#endif /* Graphics */
if ((c = fgetc(fd)) == '\n') /* \n terminates line */
break;
if (c == '\r' && (fbp->status & Fs_Untrans) == 0) {
/* \r terminates line in translated mode */
if ((c = fgetc(fd)) != '\n') /* consume following \n */
ungetc(c, fd); /* (put back if not \n) */
break;
}
if (c == EOF) {
if (l > 0) return l;
else return -1;
}
if (++l > maxi) {
ungetc(c, fd);
return -2;
}
*buf++ = c;
}
return l;
}
/*
* iconhost - return some sort of host name into the buffer pointed at
* by hostname. This code accommodates several different host name
* fetching schemes.
*/
void iconhost(hostname)
char *hostname;
{
/*
* Use the uname system call. (POSIX)
*/
struct utsname utsn;
uname(&utsn);
strcpy(hostname,utsn.nodename);
}
/*
* Read a long string in shorter parts. (Standard read may not handle long
* strings.)
*/
word longread(s,width,len,fd)
FILE *fd;
int width;
char *s;
long len;
{
tended char *ts = s;
long tally = 0;
long n = 0;
#ifdef XWindows
if (isatty(fileno(fd))) wflushall();
#endif /* XWindows */
while (len > 0) {
n = fread(ts, width, (int)((len < MaxIn) ? len : MaxIn), fd);
if (n <= 0) {
return tally;
}
tally += n;
ts += n;
len -= n;
}
return tally;
}
/*
* Print string referenced by descriptor d. Note, d must not move during
* a garbage collection.
*/
int putstr(f, d)
register FILE *f;
dptr d;
{
register char *s;
register word l;
l = StrLen(*d);
if (l == 0)
return Succeeded;
s = StrLoc(*d);
if (longwrite(s,l,f) < 0)
return Failed;
else
return Succeeded;
}
/*
* idelay(n) - delay for n milliseconds
*/
int idelay(n)
int n;
{
#if MSWIN
Sleep(n);
return Succeeded;
#else /* MSWIN */
struct timeval t;
t.tv_sec = n / 1000;
t.tv_usec = (n % 1000) * 1000;
select(1, NULL, NULL, NULL, &t);
return Succeeded;
#endif /* MSWIN */
}
#ifdef KeyboardFncs
/*
* Documentation notwithstanding, the Unix versions of the keyboard functions
* read from standard input and not necessarily from the keyboard (/dev/tty).
*/
#define STDIN 0
/*
* int getch() -- read character without echoing
* int getche() -- read character with echoing
*
* Read and return a character from standard input in non-canonical
* ("cbreak") mode. Return -1 for EOF.
*
* Reading is done even if stdin is not a tty;
* the tty get/set functions are just rejected by the system.
*/
int rchar(int with_echo);
int getch(void) { return rchar(0); }
int getche(void) { return rchar(1); }
int rchar(int with_echo)
{
struct termios otty, tty;
char c;
int n;
tcgetattr(STDIN, &otty); /* get current tty attributes */
tty = otty;
tty.c_lflag &= ~ICANON;
if (with_echo)
tty.c_lflag |= ECHO;
else
tty.c_lflag &= ~ECHO;
tcsetattr(STDIN, TCSANOW, &tty); /* set temporary attributes */
n = read(STDIN, &c, 1); /* read one char from stdin */
tcsetattr(STDIN, TCSANOW, &otty); /* reset tty to original state */
if (n == 1) /* if read succeeded */
return c & 0xFF;
else
return -1;
}
/*
* kbhit() -- return nonzero if characters are available for getch/getche.
*/
int kbhit(void)
{
struct termios otty, tty;
fd_set fds;
struct timeval tv;
int rv;
tcgetattr(STDIN, &otty); /* get current tty attributes */
tty = otty;
tty.c_lflag &= ~ICANON; /* disable input batching */
tcsetattr(STDIN, TCSANOW, &tty); /* set attribute temporarily */
FD_ZERO(&fds); /* initialize fd struct */
FD_SET(STDIN, &fds); /* set STDIN bit */
tv.tv_sec = tv.tv_usec = 0; /* set immediate return */
rv = select(STDIN + 1, &fds, NULL, NULL, &tv);
tcsetattr(STDIN, TCSANOW, &otty); /* reset tty to original state */
return rv; /* return result */
}
#endif /* KeyboardFncs */
#ifdef FAttrib
/*
* make_mode takes mode_t type (an integer) input and returns the
* file permission in the format of a string.
*/
char *make_mode (mode_t st_mode)
{
char *buf;
if ( (buf = (char *) malloc(sizeof(char)*11)) == NULL ) {
fprintf(stderr,"fatal malloc error\n");
return NULL;
}
if ( st_mode & S_IFIFO ) buf[0] = 'f';
else if ( st_mode & S_IFCHR ) buf[0] = 'c';
else if ( st_mode & S_IFDIR ) buf[0] = 'd';
else if ( st_mode & S_IFREG ) buf[0] = '-';
else buf[0] = '\?';
if (st_mode & S_IREAD) buf[1] = 'r'; else buf[1] = '-';
if (st_mode & S_IWRITE) buf[2] = 'w'; else buf[2] = '-';
if (st_mode & S_IEXEC) buf[3] = 'x'; else buf[3] = '-';
if (st_mode & S_IREAD) buf[4] = 'r'; else buf[4] = '-';
if (st_mode & S_IWRITE) buf[5] = 'w'; else buf[5] = '-';
if (st_mode & S_IEXEC) buf[6] = 'x'; else buf[6] = '-';
if (st_mode & S_IREAD) buf[7] = 'r'; else buf[7] = '-';
if (st_mode & S_IWRITE) buf[8] = 'w'; else buf[8] = '-';
if (st_mode & S_IEXEC) buf[9] = 'x'; else buf[9] = '-';
buf[10] = '\0';
return buf;
}
#endif /* FAttrib */
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