Logo Search packages:      
Sourcecode: util-linux version File versions  Download package

ul.c

/*
 * 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.
 * 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.
 */

/*
 * modified by Kars de Jong <jongk@cs.utwente.nl>
 *    to use terminfo instead of termcap.
 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
 *    added Native Language Support
 * 1999-09-19 Bruno Haible <haible@clisp.cons.org>
 *    modified to work correctly in multi-byte locales
 */

#include <stdio.h>
#include <unistd.h>           /* for getopt(), isatty() */
#include <string.h>           /* for bzero(), strcpy() */
#include <term.h>       /* for setupterm() */
#include <stdlib.h>           /* for getenv() */
#include <limits.h>           /* for INT_MAX */
#include "nls.h"

#include "widechar.h"

#ifdef ENABLE_WIDECHAR
static int put1wc(int c) /* Output an ASCII character as a wide character */
{
  if (putwchar(c) == WEOF)
    return EOF;
  else
    return c;
}
#define putwp(s) tputs(s,1,put1wc)
#else
#define putwp(s) putp(s)
#endif

void filter(FILE *f);
void flushln(void);
void overstrike(void);
void iattr(void);
void initbuf(void);
void fwd(void);
void reverse(void);
void initinfo(void);
void outc(wint_t c, int width);
void setmode(int newmode);
static void setcol(int newcol);
static void needcol(int col);

#define     IESC  '\033'
#define     SO    '\016'
#define     SI    '\017'
#define     HFWD  '9'
#define     HREV  '8'
#define     FREV  '7'

#define     NORMAL      000
#define     ALTSET      001   /* Reverse */
#define     SUPERSC     002   /* Dim */
#define     SUBSC 004   /* Dim | Ul */
#define     UNDERL      010   /* Ul */
#define     BOLD  020   /* Bold */
#define     INITBUF     512

int   must_use_uc, must_overstrike;
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;
} ;

struct      CHAR  *obuf;
int   obuflen;          /* Tracks number of elements in obuf. */
int   col, maxcol;
int   mode;
int   halfpos;
int   upln;
int   iflag;

#define     PRINT(s)    if (s == NULL) /* void */; else putwp(s)

int main(int argc, char **argv)
{
      int c, ret;
      char *termtype;
      FILE *f;

      setlocale(LC_ALL, "");
      bindtextdomain(PACKAGE, LOCALEDIR);
      textdomain(PACKAGE);

      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:
                  fprintf(stderr,
                        _("usage: %s [ -i ] [ -tTerm ] file...\n"),
                        argv[0]);
                  exit(1);
            }
      setupterm(termtype, 1, &ret);
      switch(ret) {

      case 1:
            break;

      default:
            fprintf(stderr,_("trouble reading terminfo"));
            /* fall through to ... */

      case 0:
            /* No such terminal type - assume dumb */
              setupterm("dumb", 1, (int *)0);
            break;
      }
      initinfo();
      if (    (tigetflag("os") && ENTER_BOLD==NULL ) ||
            (tigetflag("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) {
                  perror(argv[optind]);
                  exit(1);
            } else
                  filter(f);
      }
      if (ferror(stdout) || fclose(stdout))
            return 1;
      return 0;
}

void filter(FILE *f)
{
      wint_t c;
      int i, w;

      while ((c = getwc(f)) != WEOF) switch(c) {

      case '\b':
            setcol(col - 1);
            continue;

      case '\t':
            setcol((col+8) & ~07);
            continue;

      case '\r':
            setcol(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:
                  fprintf(stderr,
                        _("Unknown escape sequence in input: %o, %o\n"),
                        IESC, c);
                  exit(1);
            }
            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;
                  setcol(col);
                  continue;
            }
            obuf[col].c_char = '_';
            obuf[col].c_width = 1;
            /* fall through */
      case ' ':
            setcol(col + 1);
            continue;

      case '\n':
            flushln();
            continue;

      case '\f':
            flushln();
            putwchar('\f');
            continue;

      default:
            if (!iswprint(c)) /* non printing */
                  continue;
            w = wcwidth(c);
            needcol(col + w);
            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;
            }
            setcol(col + w);
            continue;
      }
      if (maxcol)
            flushln();
}

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++;
                  setmode(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) {
            setmode(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.
 */
void overstrike(void)
{
      register int i;
#ifdef __GNUC__
      register wchar_t *lbuf = __builtin_alloca((maxcol+1)*sizeof(wchar_t));
#else
      wchar_t lbuf[256];
#endif
      register 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);
      }
}

void iattr(void)
{
      register int i;
#ifdef __GNUC__
      register char *lbuf = __builtin_alloca((maxcol+1)*sizeof(char));
#else
      char lbuf[256];
#endif
      register char *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');
}

void initbuf(void)
{
      if (obuf == NULL) {     /* First time. */
            obuflen = INITBUF;
            obuf = malloc(sizeof(struct CHAR) * obuflen);
            if (obuf == NULL) {
                  fprintf(stderr, _("Unable to allocate buffer.\n"));
                  exit(1);
            }
      }

      /* assumes NORMAL == 0 */
      memset(obuf, 0, sizeof(struct CHAR) * obuflen);
      setcol(0);
      maxcol = 0;
      mode &= ALTSET;
}

void fwd(void)
{
      int oldcol, oldmax;

      oldcol = col;
      oldmax = maxcol;
      flushln();
      setcol(oldcol);
      maxcol = oldmax;
}

void reverse(void)
{
      upln++;
      fwd();
      PRINT(CURS_UP);
      PRINT(CURS_UP);
      upln++;
}

void initinfo(void)
{
      CURS_UP =         tigetstr("cuu1");
      CURS_RIGHT =            tigetstr("cuf1");
      CURS_LEFT =       tigetstr("cub1");
      if (CURS_LEFT == NULL)
            CURS_LEFT = "\b";

      ENTER_STANDOUT =  tigetstr("smso");
      EXIT_STANDOUT =         tigetstr("rmso");
      ENTER_UNDERLINE = tigetstr("smul");
      EXIT_UNDERLINE =  tigetstr("rmul");
      ENTER_DIM =       tigetstr("dim");
      ENTER_BOLD =            tigetstr("bold");
      ENTER_REVERSE =         tigetstr("rev");
      EXIT_ATTRIBUTES = tigetstr("sgr0");

      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 =            tigetstr("uc");
      must_use_uc = (UNDER_CHAR && !ENTER_UNDERLINE);
}

static int curmode = 0;

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);
      }
}

void setmode(int newmode)
{
      if (!iflag) {
            if (curmode != NORMAL && newmode != NORMAL)
                  setmode(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;
}

static void
setcol(int newcol) {
      col = newcol;

      if (col < 0)
            col = 0;
      else if (col > maxcol)
            needcol(col);
}

static void
needcol(int col) {
      maxcol = col;

      /* If col >= obuflen, expand obuf until obuflen > col. */
      while (col >= obuflen) {
            /* Paranoid check for obuflen == INT_MAX. */
            if (obuflen == INT_MAX) {
                  fprintf(stderr,
                        _("Input line too long.\n"));
                  exit(1);
            }

            /* Similar paranoia: double only up to INT_MAX. */
            obuflen = ((INT_MAX / 2) < obuflen)
                  ? INT_MAX
                  : obuflen * 2;

            /* Now we can try to expand obuf. */
            obuf = realloc(obuf, sizeof(struct CHAR) * obuflen);
            if (obuf == NULL) {
                  fprintf(stderr,
                        _("Out of memory when growing buffer.\n"));
                  exit(1);
            }
      }
}

Generated by  Doxygen 1.6.0   Back to index