diff options
Diffstat (limited to 'usr.bin/ul/ul.c')
| -rw-r--r-- | usr.bin/ul/ul.c | 565 |
1 files changed, 565 insertions, 0 deletions
diff --git a/usr.bin/ul/ul.c b/usr.bin/ul/ul.c new file mode 100644 index 0000000..4796956 --- /dev/null +++ b/usr.bin/ul/ul.c @@ -0,0 +1,565 @@ +/* + * Copyright (c) 1980, 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. + * 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. + */ + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1980, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)ul.c 8.1 (Berkeley) 6/6/93"; +#endif +static const char rcsid[] = + "$FreeBSD$"; +#endif /* not lint */ + +#include <err.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <termcap.h> +#include <unistd.h> +#include <wchar.h> +#include <wctype.h> + +#define IESC '\033' +#define SO '\016' +#define SI '\017' +#define HFWD '9' +#define HREV '8' +#define FREV '7' +#define MAXBUF 512 + +#define NORMAL 000 +#define ALTSET 001 /* Reverse */ +#define SUPERSC 002 /* Dim */ +#define SUBSC 004 /* Dim | Ul */ +#define UNDERL 010 /* Ul */ +#define BOLD 020 /* Bold */ + +static int must_use_uc, must_overstrike; +static const char + *CURS_UP, *CURS_RIGHT, *CURS_LEFT, + *ENTER_STANDOUT, *EXIT_STANDOUT, *ENTER_UNDERLINE, *EXIT_UNDERLINE, + *ENTER_DIM, *ENTER_BOLD, *ENTER_REVERSE, *UNDER_CHAR, *EXIT_ATTRIBUTES; + +struct CHAR { + char c_mode; + wchar_t c_char; + int c_width; /* width or -1 if multi-column char. filler */ +} ; + +static struct CHAR obuf[MAXBUF]; +static int col, maxcol; +static int mode; +static int halfpos; +static int upln; +static int iflag; + +static void usage(void); +static void setnewmode(int); +static void initcap(void); +static void reverse(void); +static int outchar(int); +static void fwd(void); +static void initbuf(void); +static void iattr(void); +static void overstrike(void); +static void flushln(void); +static void filter(FILE *); +static void outc(wint_t, int); + +#define PRINT(s) if (s == NULL) /* void */; else tputs(s, 1, outchar) + +int +main(int argc, char **argv) +{ + int c; + const char *termtype; + FILE *f; + char termcap[1024]; + + setlocale(LC_ALL, ""); + + termtype = getenv("TERM"); + if (termtype == NULL || (argv[0][0] == 'c' && !isatty(1))) + termtype = "lpr"; + while ((c=getopt(argc, argv, "it:T:")) != -1) + switch(c) { + + case 't': + case 'T': /* for nroff compatibility */ + termtype = optarg; + break; + case 'i': + iflag = 1; + break; + default: + usage(); + } + + switch(tgetent(termcap, termtype)) { + + case 1: + break; + + default: + warnx("trouble reading termcap"); + /* FALLTHROUGH */ + + case 0: + /* No such terminal type - assume dumb */ + (void)strcpy(termcap, "dumb:os:col#80:cr=^M:sf=^J:am:"); + break; + } + initcap(); + if ( (tgetflag("os") && ENTER_BOLD==NULL ) || + (tgetflag("ul") && ENTER_UNDERLINE==NULL && UNDER_CHAR==NULL)) + must_overstrike = 1; + initbuf(); + if (optind == argc) + filter(stdin); + else for (; optind<argc; optind++) { + f = fopen(argv[optind],"r"); + if (f == NULL) + err(1, "%s", argv[optind]); + else + filter(f); + } + exit(0); +} + +static void +usage(void) +{ + fprintf(stderr, "usage: ul [-i] [-t terminal] [file ...]\n"); + exit(1); +} + +static void +filter(FILE *f) +{ + wint_t c; + int i, w; + + while ((c = getwc(f)) != WEOF && col < MAXBUF) switch(c) { + + case '\b': + if (col > 0) + col--; + continue; + + case '\t': + col = (col+8) & ~07; + if (col > maxcol) + maxcol = col; + continue; + + case '\r': + col = 0; + continue; + + case SO: + mode |= ALTSET; + continue; + + case SI: + mode &= ~ALTSET; + continue; + + case IESC: + switch (c = getwc(f)) { + + case HREV: + if (halfpos == 0) { + mode |= SUPERSC; + halfpos--; + } else if (halfpos > 0) { + mode &= ~SUBSC; + halfpos--; + } else { + halfpos = 0; + reverse(); + } + continue; + + case HFWD: + if (halfpos == 0) { + mode |= SUBSC; + halfpos++; + } else if (halfpos < 0) { + mode &= ~SUPERSC; + halfpos++; + } else { + halfpos = 0; + fwd(); + } + continue; + + case FREV: + reverse(); + continue; + + default: + errx(1, "unknown escape sequence in input: %o, %o", IESC, c); + } + continue; + + case '_': + if (obuf[col].c_char || obuf[col].c_width < 0) { + while (col > 0 && obuf[col].c_width < 0) + col--; + w = obuf[col].c_width; + for (i = 0; i < w; i++) + obuf[col++].c_mode |= UNDERL | mode; + if (col > maxcol) + maxcol = col; + continue; + } + obuf[col].c_char = '_'; + obuf[col].c_width = 1; + /* FALLTHROUGH */ + case ' ': + col++; + if (col > maxcol) + maxcol = col; + continue; + + case '\n': + flushln(); + continue; + + case '\f': + flushln(); + putwchar('\f'); + continue; + + default: + if ((w = wcwidth(c)) <= 0) /* non printing */ + continue; + if (obuf[col].c_char == '\0') { + obuf[col].c_char = c; + for (i = 0; i < w; i++) + obuf[col + i].c_mode = mode; + obuf[col].c_width = w; + for (i = 1; i < w; i++) + obuf[col + i].c_width = -1; + } else if (obuf[col].c_char == '_') { + obuf[col].c_char = c; + for (i = 0; i < w; i++) + obuf[col + i].c_mode |= UNDERL|mode; + obuf[col].c_width = w; + for (i = 1; i < w; i++) + obuf[col + i].c_width = -1; + } else if (obuf[col].c_char == c) { + for (i = 0; i < w; i++) + obuf[col + i].c_mode |= BOLD|mode; + } else { + w = obuf[col].c_width; + for (i = 0; i < w; i++) + obuf[col + i].c_mode = mode; + } + col += w; + if (col > maxcol) + maxcol = col; + continue; + } + if (ferror(f)) + err(1, NULL); + if (maxcol) + flushln(); +} + +static void +flushln(void) +{ + int lastmode; + int i; + int hadmodes = 0; + + lastmode = NORMAL; + for (i=0; i<maxcol; i++) { + if (obuf[i].c_mode != lastmode) { + hadmodes++; + setnewmode(obuf[i].c_mode); + lastmode = obuf[i].c_mode; + } + if (obuf[i].c_char == '\0') { + if (upln) + PRINT(CURS_RIGHT); + else + outc(' ', 1); + } else + outc(obuf[i].c_char, obuf[i].c_width); + if (obuf[i].c_width > 1) + i += obuf[i].c_width - 1; + } + if (lastmode != NORMAL) { + setnewmode(0); + } + if (must_overstrike && hadmodes) + overstrike(); + putwchar('\n'); + if (iflag && hadmodes) + iattr(); + (void)fflush(stdout); + if (upln) + upln--; + initbuf(); +} + +/* + * For terminals that can overstrike, overstrike underlines and bolds. + * We don't do anything with halfline ups and downs, or Greek. + */ +static void +overstrike(void) +{ + int i; + wchar_t lbuf[256]; + wchar_t *cp = lbuf; + int hadbold=0; + + /* Set up overstrike buffer */ + for (i=0; i<maxcol; i++) + switch (obuf[i].c_mode) { + case NORMAL: + default: + *cp++ = ' '; + break; + case UNDERL: + *cp++ = '_'; + break; + case BOLD: + *cp++ = obuf[i].c_char; + if (obuf[i].c_width > 1) + i += obuf[i].c_width - 1; + hadbold=1; + break; + } + putwchar('\r'); + for (*cp=' '; *cp==' '; cp--) + *cp = 0; + for (cp=lbuf; *cp; cp++) + putwchar(*cp); + if (hadbold) { + putwchar('\r'); + for (cp=lbuf; *cp; cp++) + putwchar(*cp=='_' ? ' ' : *cp); + putwchar('\r'); + for (cp=lbuf; *cp; cp++) + putwchar(*cp=='_' ? ' ' : *cp); + } +} + +static void +iattr(void) +{ + int i; + wchar_t lbuf[256]; + wchar_t *cp = lbuf; + + for (i=0; i<maxcol; i++) + switch (obuf[i].c_mode) { + case NORMAL: *cp++ = ' '; break; + case ALTSET: *cp++ = 'g'; break; + case SUPERSC: *cp++ = '^'; break; + case SUBSC: *cp++ = 'v'; break; + case UNDERL: *cp++ = '_'; break; + case BOLD: *cp++ = '!'; break; + default: *cp++ = 'X'; break; + } + for (*cp=' '; *cp==' '; cp--) + *cp = 0; + for (cp=lbuf; *cp; cp++) + putwchar(*cp); + putwchar('\n'); +} + +static void +initbuf(void) +{ + + bzero((char *)obuf, sizeof (obuf)); /* depends on NORMAL == 0 */ + col = 0; + maxcol = 0; + mode &= ALTSET; +} + +static void +fwd(void) +{ + int oldcol, oldmax; + + oldcol = col; + oldmax = maxcol; + flushln(); + col = oldcol; + maxcol = oldmax; +} + +static void +reverse(void) +{ + upln++; + fwd(); + PRINT(CURS_UP); + PRINT(CURS_UP); + upln++; +} + +static void +initcap(void) +{ + static char tcapbuf[512]; + char *bp = tcapbuf; + + /* This nonsense attempts to work with both old and new termcap */ + CURS_UP = tgetstr("up", &bp); + CURS_RIGHT = tgetstr("ri", &bp); + if (CURS_RIGHT == NULL) + CURS_RIGHT = tgetstr("nd", &bp); + CURS_LEFT = tgetstr("le", &bp); + if (CURS_LEFT == NULL) + CURS_LEFT = tgetstr("bc", &bp); + if (CURS_LEFT == NULL && tgetflag("bs")) + CURS_LEFT = "\b"; + + ENTER_STANDOUT = tgetstr("so", &bp); + EXIT_STANDOUT = tgetstr("se", &bp); + ENTER_UNDERLINE = tgetstr("us", &bp); + EXIT_UNDERLINE = tgetstr("ue", &bp); + ENTER_DIM = tgetstr("mh", &bp); + ENTER_BOLD = tgetstr("md", &bp); + ENTER_REVERSE = tgetstr("mr", &bp); + EXIT_ATTRIBUTES = tgetstr("me", &bp); + + if (!ENTER_BOLD && ENTER_REVERSE) + ENTER_BOLD = ENTER_REVERSE; + if (!ENTER_BOLD && ENTER_STANDOUT) + ENTER_BOLD = ENTER_STANDOUT; + if (!ENTER_UNDERLINE && ENTER_STANDOUT) { + ENTER_UNDERLINE = ENTER_STANDOUT; + EXIT_UNDERLINE = EXIT_STANDOUT; + } + if (!ENTER_DIM && ENTER_STANDOUT) + ENTER_DIM = ENTER_STANDOUT; + if (!ENTER_REVERSE && ENTER_STANDOUT) + ENTER_REVERSE = ENTER_STANDOUT; + if (!EXIT_ATTRIBUTES && EXIT_STANDOUT) + EXIT_ATTRIBUTES = EXIT_STANDOUT; + + /* + * Note that we use REVERSE for the alternate character set, + * not the as/ae capabilities. This is because we are modelling + * the model 37 teletype (since that's what nroff outputs) and + * the typical as/ae is more of a graphics set, not the greek + * letters the 37 has. + */ + + UNDER_CHAR = tgetstr("uc", &bp); + must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE); +} + +static int +outchar(int c) +{ + return (putwchar(c) != WEOF ? c : EOF); +} + +static int curmode = 0; + +static void +outc(wint_t c, int width) +{ + int i; + + putwchar(c); + if (must_use_uc && (curmode&UNDERL)) { + for (i = 0; i < width; i++) + PRINT(CURS_LEFT); + for (i = 0; i < width; i++) + PRINT(UNDER_CHAR); + } +} + +static void +setnewmode(int newmode) +{ + if (!iflag) { + if (curmode != NORMAL && newmode != NORMAL) + setnewmode(NORMAL); + switch (newmode) { + case NORMAL: + switch(curmode) { + case NORMAL: + break; + case UNDERL: + PRINT(EXIT_UNDERLINE); + break; + default: + /* This includes standout */ + PRINT(EXIT_ATTRIBUTES); + break; + } + break; + case ALTSET: + PRINT(ENTER_REVERSE); + break; + case SUPERSC: + /* + * This only works on a few terminals. + * It should be fixed. + */ + PRINT(ENTER_UNDERLINE); + PRINT(ENTER_DIM); + break; + case SUBSC: + PRINT(ENTER_DIM); + break; + case UNDERL: + PRINT(ENTER_UNDERLINE); + break; + case BOLD: + PRINT(ENTER_BOLD); + break; + default: + /* + * We should have some provision here for multiple modes + * on at once. This will have to come later. + */ + PRINT(ENTER_STANDOUT); + break; + } + } + curmode = newmode; +} |
