538 lines
10 KiB
C
538 lines
10 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)ul.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termcap.h>
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#include <unistd.h>
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#define IESC '\033'
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#define SO '\016'
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#define SI '\017'
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#define HFWD '9'
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#define HREV '8'
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#define FREV '7'
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#define MAXBUF 512
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#define NORMAL 000
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#define ALTSET 001 /* Reverse */
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#define SUPERSC 002 /* Dim */
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#define SUBSC 004 /* Dim | Ul */
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#define UNDERL 010 /* Ul */
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#define BOLD 020 /* Bold */
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int must_use_uc, must_overstrike;
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const char
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*CURS_UP, *CURS_RIGHT, *CURS_LEFT,
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*ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE,
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*ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES;
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struct CHAR {
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char c_mode;
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char c_char;
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} ;
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struct CHAR obuf[MAXBUF];
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int col, maxcol;
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int mode;
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int halfpos;
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int upln;
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int iflag;
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static void usage(void);
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void setnewmode(int);
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void initcap(void);
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void reverse(void);
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int outchar(int);
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void fwd(void);
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void initbuf(void);
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void iattr(void);
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void overstrike(void);
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void flushln(void);
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void filter(FILE *);
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void outc(int);
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#define PRINT(s) if (s == NULL) /* void */; else tputs(s, 1, outchar)
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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int c;
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const char *termtype;
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FILE *f;
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char termcap[1024];
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termtype = getenv("TERM");
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if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1)))
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termtype = "lpr";
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while ((c=getopt(argc, argv, "it:T:")) != -1)
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switch(c) {
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case 't':
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case 'T': /* for nroff compatibility */
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termtype = optarg;
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break;
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case 'i':
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iflag = 1;
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break;
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default:
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usage();
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}
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switch(tgetent(termcap, termtype)) {
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case 1:
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break;
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default:
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warnx("trouble reading termcap");
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/* FALLTHROUGH */
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case 0:
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/* No such terminal type - assume dumb */
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(void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:");
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break;
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}
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initcap();
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if ( (tgetflag("os") && ENTER_BOLD==NULL ) ||
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(tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL))
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must_overstrike = 1;
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initbuf();
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if (optind == argc)
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filter(stdin);
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else for (; optind<argc; optind++) {
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f = fopen(argv[optind],"r");
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if (f == NULL)
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err(1, "%s", argv[optind]);
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else
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filter(f);
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}
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exit(0);
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}
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static void
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usage()
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{
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fprintf(stderr, "usage: ul [-i] [-t terminal] file...\n");
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exit(1);
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}
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void
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filter(f)
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FILE *f;
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{
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int c;
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while ((c = getc(f)) != EOF && col < MAXBUF) switch(c) {
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case '\b':
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if (col > 0)
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col--;
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continue;
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case '\t':
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col = (col+8) & ~07;
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if (col > maxcol)
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maxcol = col;
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continue;
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case '\r':
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col = 0;
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continue;
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case SO:
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mode |= ALTSET;
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continue;
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case SI:
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mode &= ~ALTSET;
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continue;
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case IESC:
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switch (c = getc(f)) {
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case HREV:
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if (halfpos == 0) {
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mode |= SUPERSC;
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halfpos--;
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} else if (halfpos > 0) {
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mode &= ~SUBSC;
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halfpos--;
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} else {
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halfpos = 0;
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reverse();
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}
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continue;
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case HFWD:
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if (halfpos == 0) {
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mode |= SUBSC;
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halfpos++;
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} else if (halfpos < 0) {
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mode &= ~SUPERSC;
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halfpos++;
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} else {
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halfpos = 0;
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fwd();
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}
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continue;
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case FREV:
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reverse();
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continue;
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default:
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errx(1, "unknown escape sequence in input: %o, %o", IESC, c);
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}
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continue;
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case '_':
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if (obuf[col].c_char)
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obuf[col].c_mode |= UNDERL | mode;
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else
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obuf[col].c_char = '_';
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case ' ':
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col++;
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if (col > maxcol)
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maxcol = col;
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continue;
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case '\n':
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flushln();
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continue;
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case '\f':
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flushln();
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putchar('\f');
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continue;
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default:
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if (c < ' ') /* non printing */
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continue;
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if (obuf[col].c_char == '\0') {
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obuf[col].c_char = c;
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obuf[col].c_mode = mode;
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} else if (obuf[col].c_char == '_') {
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obuf[col].c_char = c;
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obuf[col].c_mode |= UNDERL|mode;
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} else if (obuf[col].c_char == c)
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obuf[col].c_mode |= BOLD|mode;
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else
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obuf[col].c_mode = mode;
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col++;
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if (col > maxcol)
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maxcol = col;
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continue;
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}
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if (maxcol)
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flushln();
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}
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void
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flushln()
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{
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int lastmode;
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int i;
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int hadmodes = 0;
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lastmode = NORMAL;
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for (i=0; i<maxcol; i++) {
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if (obuf[i].c_mode != lastmode) {
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hadmodes++;
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setnewmode(obuf[i].c_mode);
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lastmode = obuf[i].c_mode;
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}
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if (obuf[i].c_char == '\0') {
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if (upln)
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PRINT(CURS_RIGHT);
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else
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outc(' ');
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} else
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outc(obuf[i].c_char);
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}
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if (lastmode != NORMAL) {
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setnewmode(0);
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}
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if (must_overstrike && hadmodes)
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overstrike();
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putchar('\n');
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if (iflag && hadmodes)
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iattr();
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(void)fflush(stdout);
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if (upln)
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upln--;
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initbuf();
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}
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/*
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* For terminals that can overstrike, overstrike underlines and bolds.
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* We don't do anything with halfline ups and downs, or Greek.
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*/
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void
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overstrike()
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{
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register int i;
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char lbuf[256];
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register char *cp = lbuf;
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int hadbold=0;
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/* Set up overstrike buffer */
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for (i=0; i<maxcol; i++)
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switch (obuf[i].c_mode) {
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case NORMAL:
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default:
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*cp++ = ' ';
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break;
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case UNDERL:
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*cp++ = '_';
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break;
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case BOLD:
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*cp++ = obuf[i].c_char;
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hadbold=1;
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break;
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}
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putchar('\r');
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for (*cp=' '; *cp==' '; cp--)
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*cp = 0;
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for (cp=lbuf; *cp; cp++)
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putchar(*cp);
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if (hadbold) {
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putchar('\r');
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for (cp=lbuf; *cp; cp++)
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putchar(*cp=='_' ? ' ' : *cp);
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putchar('\r');
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for (cp=lbuf; *cp; cp++)
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putchar(*cp=='_' ? ' ' : *cp);
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}
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}
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void
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iattr()
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{
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register int i;
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char lbuf[256];
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register char *cp = lbuf;
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for (i=0; i<maxcol; i++)
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switch (obuf[i].c_mode) {
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case NORMAL: *cp++ = ' '; break;
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case ALTSET: *cp++ = 'g'; break;
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case SUPERSC: *cp++ = '^'; break;
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case SUBSC: *cp++ = 'v'; break;
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case UNDERL: *cp++ = '_'; break;
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case BOLD: *cp++ = '!'; break;
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default: *cp++ = 'X'; break;
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}
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for (*cp=' '; *cp==' '; cp--)
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*cp = 0;
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for (cp=lbuf; *cp; cp++)
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putchar(*cp);
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putchar('\n');
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}
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void
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initbuf()
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{
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bzero((char *)obuf, sizeof (obuf)); /* depends on NORMAL == 0 */
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col = 0;
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maxcol = 0;
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mode &= ALTSET;
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}
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void
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fwd()
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{
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int oldcol, oldmax;
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oldcol = col;
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oldmax = maxcol;
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flushln();
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col = oldcol;
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maxcol = oldmax;
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}
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void
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reverse()
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{
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upln++;
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fwd();
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PRINT(CURS_UP);
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PRINT(CURS_UP);
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upln++;
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}
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void
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initcap()
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{
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static char tcapbuf[512];
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char *bp = tcapbuf;
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/* This nonsense attempts to work with both old and new termcap */
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CURS_UP = tgetstr("up", &bp);
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CURS_RIGHT = tgetstr("ri", &bp);
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if (CURS_RIGHT == NULL)
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CURS_RIGHT = tgetstr("nd", &bp);
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CURS_LEFT = tgetstr("le", &bp);
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if (CURS_LEFT == NULL)
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CURS_LEFT = tgetstr("bc", &bp);
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if (CURS_LEFT == NULL && tgetflag("bs"))
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CURS_LEFT = "\b";
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ENTER_STANDOUT = tgetstr("so", &bp);
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EXIT_STANDOUT = tgetstr("se", &bp);
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ENTER_UNDERLINE = tgetstr("us", &bp);
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EXIT_UNDERLINE = tgetstr("ue", &bp);
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ENTER_DIM = tgetstr("mh", &bp);
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ENTER_BOLD = tgetstr("md", &bp);
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ENTER_REVERSE = tgetstr("mr", &bp);
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EXIT_ATTRIBUTES = tgetstr("me", &bp);
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if (!ENTER_BOLD && ENTER_REVERSE)
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ENTER_BOLD = ENTER_REVERSE;
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if (!ENTER_BOLD && ENTER_STANDOUT)
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ENTER_BOLD = ENTER_STANDOUT;
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if (!ENTER_UNDERLINE && ENTER_STANDOUT) {
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ENTER_UNDERLINE = ENTER_STANDOUT;
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EXIT_UNDERLINE = EXIT_STANDOUT;
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}
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if (!ENTER_DIM && ENTER_STANDOUT)
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ENTER_DIM = ENTER_STANDOUT;
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if (!ENTER_REVERSE && ENTER_STANDOUT)
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ENTER_REVERSE = ENTER_STANDOUT;
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if (!EXIT_ATTRIBUTES && EXIT_STANDOUT)
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EXIT_ATTRIBUTES = EXIT_STANDOUT;
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/*
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* Note that we use REVERSE for the alternate character set,
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* not the as/ae capabilities. This is because we are modelling
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* the model 37 teletype (since that's what nroff outputs) and
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* the typical as/ae is more of a graphics set, not the greek
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* letters the 37 has.
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*/
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UNDER_CHAR = tgetstr("uc", &bp);
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must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
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}
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int
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outchar(c)
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int c;
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{
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return(putchar(c & 0177));
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}
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static int curmode = 0;
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void
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outc(c)
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int c;
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{
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putchar(c);
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if (must_use_uc && (curmode&UNDERL)) {
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PRINT(CURS_LEFT);
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PRINT(UNDER_CHAR);
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}
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}
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void
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setnewmode(newmode)
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int newmode;
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{
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if (!iflag) {
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if (curmode != NORMAL && newmode != NORMAL)
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setnewmode(NORMAL);
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switch (newmode) {
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case NORMAL:
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switch(curmode) {
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case NORMAL:
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break;
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case UNDERL:
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PRINT(EXIT_UNDERLINE);
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break;
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default:
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/* This includes standout */
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PRINT(EXIT_ATTRIBUTES);
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break;
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}
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break;
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case ALTSET:
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PRINT(ENTER_REVERSE);
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break;
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case SUPERSC:
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/*
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* This only works on a few terminals.
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* It should be fixed.
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*/
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PRINT(ENTER_UNDERLINE);
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PRINT(ENTER_DIM);
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break;
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case SUBSC:
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PRINT(ENTER_DIM);
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break;
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case UNDERL:
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PRINT(ENTER_UNDERLINE);
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break;
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case BOLD:
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PRINT(ENTER_BOLD);
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break;
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default:
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/*
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* We should have some provision here for multiple modes
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* on at once. This will have to come later.
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*/
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PRINT(ENTER_STANDOUT);
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break;
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}
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}
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curmode = newmode;
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}
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