513 lines
10 KiB
C
513 lines
10 KiB
C
/* $NetBSD: ul.c,v 1.19 2016/06/23 03:58:13 abhinav Exp $ */
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/*
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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. 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
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The Regents of the University of California. All rights reserved.");
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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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__RCSID("$NetBSD: ul.c,v 1.19 2016/06/23 03:58:13 abhinav Exp $");
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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 <term.h>
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#include <unistd.h>
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#include <util.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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static int must_overstrike;
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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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static size_t col, maxcol;
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static int mode;
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static int halfpos;
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static int upln;
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static int iflag;
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static void filter(FILE *);
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static void flushln(struct CHAR *, size_t);
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static void fwd(struct CHAR *, size_t);
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static void iattr(struct CHAR *);
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static void initbuf(struct CHAR *, size_t);
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static void outc(int);
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static int outchar(int);
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static void overstrike(struct CHAR *);
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static void reverse(struct CHAR *, size_t);
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static void setulmode(int);
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static void alloc_buf(struct CHAR **, size_t *);
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static void set_mode(void);
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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(int argc, 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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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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fprintf(stderr,
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"usage: %s [ -i ] [ -tTerm ] file...\n",
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argv[0]);
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exit(1);
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}
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setupterm(termtype, 0, NULL);
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if ((over_strike && enter_bold_mode == NULL) ||
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(transparent_underline && enter_underline_mode == NULL &&
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underline_char == NULL)) {
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set_mode();
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}
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if (optind == argc)
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filter(stdin);
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else {
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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(EXIT_FAILURE, "Failed to open `%s'", argv[optind]);
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filter(f);
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fclose(f);
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}
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}
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exit(0);
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}
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static void
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filter(FILE *f)
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{
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int c;
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struct CHAR *obuf = NULL;
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size_t obuf_size = 0;
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alloc_buf(&obuf, &obuf_size);
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while ((c = getc(f)) != EOF) 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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if (col >= obuf_size)
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alloc_buf(&obuf, &obuf_size);
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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(obuf, obuf_size);
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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(obuf, obuf_size);
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}
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continue;
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case FREV:
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reverse(obuf, obuf_size);
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continue;
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default:
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fprintf(stderr,
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"Unknown escape sequence in input: %o, %o\n",
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IESC, c);
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exit(1);
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}
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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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if (col >= obuf_size)
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alloc_buf(&obuf, &obuf_size);
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continue;
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case '\n':
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flushln(obuf, obuf_size);
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continue;
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case '\f':
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flushln(obuf, obuf_size);
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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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if (col >= obuf_size)
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alloc_buf(&obuf, &obuf_size);
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continue;
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}
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if (maxcol)
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flushln(obuf, obuf_size);
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free(obuf);
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}
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static void
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flushln(struct CHAR *obuf, size_t obuf_size)
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{
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int lastmode;
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size_t 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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setulmode(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(cursor_right);
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}
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else {
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outc(' ');
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}
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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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setulmode(0);
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}
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if (must_overstrike && hadmodes)
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overstrike(obuf);
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putchar('\n');
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if (iflag && hadmodes)
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iattr(obuf);
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(void)fflush(stdout);
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if (upln)
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upln--;
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initbuf(obuf, obuf_size);
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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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static void
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overstrike(struct CHAR *obuf)
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{
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size_t i;
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char lbuf[256];
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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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static void
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iattr(struct CHAR *obuf)
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{
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size_t i;
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char lbuf[256];
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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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static void
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initbuf(struct CHAR *obuf, size_t obuf_size)
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{
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memset(obuf, 0, obuf_size * sizeof(*obuf)); /* depends on NORMAL == 0 */
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col = 0;
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maxcol = 0;
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set_mode();
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}
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static void
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set_mode(void)
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{
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mode &= ALTSET;
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}
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static void
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fwd(struct CHAR *obuf, size_t obuf_size)
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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(obuf, obuf_size);
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col = oldcol;
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maxcol = oldmax;
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}
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static void
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reverse(struct CHAR *obuf, size_t obuf_size)
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{
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upln++;
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fwd(obuf, obuf_size);
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PRINT(cursor_up);
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PRINT(cursor_up);
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upln++;
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}
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static int
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outchar(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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static void
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outc(int c)
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{
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putchar(c);
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if (underline_char && !enter_underline_mode && (curmode & UNDERL)) {
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if (cursor_left)
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PRINT(cursor_left);
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else
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putchar('\b');
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PRINT(underline_char);
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}
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}
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static void
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setulmode(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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setulmode(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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if (enter_underline_mode)
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PRINT(exit_underline_mode);
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else
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PRINT(exit_standout_mode);
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break;
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default:
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/* This includes standout */
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if (exit_attribute_mode)
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PRINT(exit_attribute_mode);
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else
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PRINT(exit_standout_mode);
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break;
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}
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break;
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case ALTSET:
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if (enter_reverse_mode)
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PRINT(enter_reverse_mode);
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else
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PRINT(enter_standout_mode);
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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_mode);
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PRINT(enter_dim_mode);
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break;
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case SUBSC:
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if (enter_dim_mode)
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PRINT(enter_dim_mode);
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else
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PRINT(enter_standout_mode);
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break;
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case UNDERL:
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if (enter_underline_mode)
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PRINT(enter_underline_mode);
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else
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PRINT(enter_standout_mode);
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break;
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case BOLD:
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if (enter_bold_mode)
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PRINT(enter_bold_mode);
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else
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PRINT(enter_reverse_mode);
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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_mode);
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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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/*
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* Reallocates the buffer pointed to by *buf and sets
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* the newly allocated set of bytes to 0.
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*/
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static void
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alloc_buf(struct CHAR **buf, size_t *size)
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{
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size_t osize = *size;
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*size += MAXBUF;
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ereallocarr(buf, *size, sizeof(**buf));
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memset(*buf + osize, 0, (*size - osize) * sizeof(**buf));
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}
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