finger-modif/finger/display.c

180 lines
4.4 KiB
C

/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#include <termios.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "finger.h"
int
getscreenwidth(void)
{
#if defined(TIOCGWINSZ)
struct winsize ws;
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) < 0 || ws.ws_col==0) {
return 80;
}
return ws.ws_col;
#elif defined(TIOCGSIZE)
struct ttysize ts;
if (ioctl(STDIN_FILENO, TIOCGSIZE, &ts) < 0 || ts.ts_cols==0) {
return 80;
}
return ts.ts_cols;
#else
const char *e = getenv("COLUMNS");
int col = e ? atoi(e) : 0;
if (col==0) col = 80;
return col;
#endif
}
int
is8bit(void)
{
static int cache=-1;
struct termios tios;
if (cache>=0) return cache;
if (tcgetattr(STDIN_FILENO, &tios)<0) {
/* assume 8-bit; it's 1999 now, not 1972 */
cache = 1;
}
else {
cache = (tios.c_cflag & CSIZE)==CS8;
}
return cache;
}
/************/
static int send_crs=0;
void
set_crmode(void)
{
send_crs = 1;
}
static
void
fxputc(FILE *f, int ch)
{
/* drop any sign */
ch = ch&0xff;
/* on 7-bit terminals, strip high bit */
if (!is8bit()) ch &= 0x7f;
/*
* Assume anything that isn't a control character is printable.
* We can't count on locale stuff to tell us what's printable
* because we might be looking at someone who uses different
* locale settings or is on the other side of the planet. So,
* strip 0-31, 127, 128-159, and 255. Note that not stripping
* 128-159 is asking for trouble, as 155 (M-esc) is interpreted
* as esc-[ by most terminals. Hopefully this won't break anyone's
* charset.
*
* It would be nice if we could set the terminal to display in the
* right charset, but we have no way to know what it is. feh.
*/
if (((ch&0x7f) >= 32 && (ch&0x7f) != 0x7f) || ch=='\t') {
putc(ch, f);
return;
}
if (ch=='\n') {
if (send_crs) putc('\r', f);
putc('\n', f);
return;
}
if (ch&0x80) {
putc('M', f);
putc('-', f);
ch &= 0x7f;
}
putc('^', f);
if (ch==0x7f) putc('?', f);
else putc(ch+'@', f);
}
void
xputc(int ch)
{
fxputc(stdout, ch);
}
static void fxputs(FILE *f, const char *buf) {
int i;
for (i=0; buf[i]; i++) fxputc(f, buf[i]);
}
int xprintf(const char *fmt, ...) {
char buf[1024];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
fxputs(stdout, buf);
return strlen(buf);
}
int eprintf(const char *fmt, ...) {
char buf[1024];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
fxputs(stderr, buf);
return strlen(buf);
}