2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
6 * Michael Rendell of the Memorial University of Newfoundland.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * Wed Jun 22 22:15:41 1994, faith@cs.unc.edu: Added internationalization
37 * patches from Andries.Brouwer@cwi.nl
38 * Wed Sep 14 22:31:17 1994: patches from Carl Christofferson
39 * (cchris@connected.com)
40 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
41 * added Native Language Support
42 * 1999-09-19 Bruno Haible <haible@clisp.cons.org>
43 * modified to work correctly in multi-byte locales
57 #define BS '\b' /* backspace */
58 #define TAB '\t' /* tab */
59 #define SPACE ' ' /* space */
60 #define NL '\n' /* newline */
61 #define CR '\r' /* carriage return */
62 #define ESC '\033' /* escape */
63 #define SI '\017' /* shift in to normal character set */
64 #define SO '\016' /* shift out to alternate character set */
65 #define VT '\013' /* vertical tab (aka reverse line feed) */
66 #define RLF '\007' /* ESC-07 reverse line feed */
67 #define RHLF '\010' /* ESC-010 reverse half-line feed */
68 #define FHLF '\011' /* ESC-011 forward half-line feed */
70 /* build up at least this many lines before flushing them out */
71 #define BUFFER_MARGIN 32
75 typedef struct char_str {
77 #define CS_ALTERNATE 2
78 short c_column; /* column character is in */
79 CSET c_set; /* character set (currently only 2) */
80 wchar_t c_char; /* character in question */
81 int c_width; /* character width */
84 typedef struct line_str LINE;
86 CHAR *l_line; /* characters on the line */
87 LINE *l_prev; /* previous line */
88 LINE *l_next; /* next line */
89 int l_lsize; /* allocated sizeof l_line */
90 int l_line_len; /* strlen(l_line) */
91 int l_needs_sort; /* set if chars went in out of order */
92 int l_max_col; /* max column in the line */
98 void free_line(LINE *l);
99 void flush_line(LINE *l);
100 void flush_lines(int);
101 void flush_blanks(void);
102 void *xmalloc(void *p, size_t size);
103 LINE *alloc_line(void);
105 CSET last_set; /* char_set of last char printed */
107 int compress_spaces; /* if doing space -> tab conversion */
108 int fine; /* if `fine' resolution (half lines) */
109 int max_bufd_lines; /* max # lines to keep in memory */
110 int nblank_lines; /* # blanks after last flushed line */
111 int no_backspaces; /* if not to output any backspaces */
112 int pass_unknown_seqs; /* whether to pass unknown control sequences */
115 if (putwchar(ch) == WEOF) \
118 int main(int argc, char **argv)
122 CSET cur_set; /* current character set */
123 LINE *l; /* current line */
124 int extra_lines; /* # of lines above first line */
125 int cur_col; /* current column */
126 int cur_line; /* line number of current position */
127 int max_line; /* max value of cur_line */
128 int this_line; /* line l points to */
129 int nflushd_lines; /* number of lines that were flushed */
130 int adjust, opt, warned;
133 setlocale(LC_ALL, "");
134 bindtextdomain(PACKAGE, LOCALEDIR);
137 max_bufd_lines = 128;
138 compress_spaces = 1; /* compress spaces into tabs */
139 pass_unknown_seqs = 0; /* remove unknown escape sequences */
140 while ((opt = getopt(argc, argv, "bfhl:px")) != -1)
142 case 'b': /* do not output backspaces */
145 case 'f': /* allow half forward line feeds */
148 case 'h': /* compress spaces into tabs */
151 case 'l': /* buffered line count */
152 if ((max_bufd_lines = atoi(optarg)) <= 0) {
153 (void)fprintf(stderr,
154 _("col: bad -l argument %s.\n"), optarg);
159 pass_unknown_seqs = 1;
161 case 'x': /* do not compress spaces into tabs */
172 /* this value is in half lines */
175 adjust = cur_col = extra_lines = warned = 0;
176 cur_line = max_line = nflushd_lines = this_line = 0;
177 cur_set = last_set = CS_NORMAL;
178 lines = l = alloc_line();
180 while (feof(stdin)==0) {
182 if ((ch = getwchar()) == WEOF) {
191 case BS: /* can't go back further */
199 case ESC: /* just ignore EOF */
209 if (cur_line > max_line)
215 if (cur_line > max_line)
226 cur_set = CS_ALTERNATE;
228 case TAB: /* adjust column */
238 cur_col += wcwidth(ch);
241 if (!pass_unknown_seqs)
245 /* Must stuff ch in a line - are we at the right one? */
246 if (cur_line != this_line - adjust) {
251 nmove = cur_line - this_line;
253 /* round up to next line */
260 for (; nmove < 0 && l->l_prev; nmove++)
263 if (nflushd_lines == 0) {
265 * Allow backup past first
266 * line if nothing has been
269 for (; nmove < 0; nmove++) {
283 /* may need to allocate here */
284 for (; nmove > 0 && l->l_next; nmove--)
286 for (; nmove > 0; nmove--) {
293 this_line = cur_line + adjust;
294 nmove = this_line - nflushd_lines;
295 if (nmove >= max_bufd_lines + BUFFER_MARGIN) {
296 nflushd_lines += nmove - max_bufd_lines;
297 flush_lines(nmove - max_bufd_lines);
300 /* grow line's buffer? */
301 if (l->l_line_len + 1 >= l->l_lsize) {
304 need = l->l_lsize ? l->l_lsize * 2 : 90;
305 l->l_line = (CHAR *)xmalloc((void *) l->l_line,
306 (unsigned) need * sizeof(CHAR));
309 c = &l->l_line[l->l_line_len++];
312 c->c_column = cur_col;
313 c->c_width = wcwidth(ch);
315 * If things are put in out of order, they will need sorting
316 * when it is flushed.
318 if (cur_col < l->l_max_col)
321 l->l_max_col = cur_col;
323 cur_col += c->c_width;
325 /* goto the last line that had a character on it */
326 for (; l->l_next; l = l->l_next)
328 flush_lines(this_line - nflushd_lines + extra_lines + 1);
330 /* make sure we leave things in a sane state */
331 if (last_set != CS_NORMAL)
334 /* flush out the last few blank lines */
335 nblank_lines = max_line - this_line;
338 else if (!nblank_lines)
339 /* missing a \n on the last line? */
342 if (ferror(stdout) || fclose(stdout))
347 void flush_lines(int nflush)
351 while (--nflush >= 0) {
360 (void)free((void *)l->l_line);
364 lines->l_prev = NULL;
368 * Print a number of newline/half newlines. If fine flag is set, nblank_lines
369 * is the number of half line feeds, otherwise it is the number of whole line
385 for (i = nb; --i >= 0;)
397 * Write a line to stdout taking care of space to tab conversion (-h flag)
398 * and character set shifts.
400 void flush_line(LINE *l)
403 int nchars, last_col, this_col;
406 nchars = l->l_line_len;
408 if (l->l_needs_sort) {
410 static int count_size, *count, i, save, sorted_size, tot;
413 * Do an O(n) sort on l->l_line by column being careful to
414 * preserve the order of characters in the same column.
416 if (l->l_lsize > sorted_size) {
417 sorted_size = l->l_lsize;
418 sorted = (CHAR *)xmalloc((void *)sorted,
419 (unsigned)sizeof(CHAR) * sorted_size);
421 if (l->l_max_col >= count_size) {
422 count_size = l->l_max_col + 1;
423 count = (int *)xmalloc((void *)count,
424 (unsigned)sizeof(int) * count_size);
426 memset(count, 0, sizeof(int) * l->l_max_col + 1);
427 for (i = nchars, c = l->l_line; --i >= 0; c++)
428 count[c->c_column]++;
431 * calculate running total (shifted down by 1) to use as
432 * indices into new line.
434 for (tot = 0, i = 0; i <= l->l_max_col; i++) {
440 for (i = nchars, c = l->l_line; --i >= 0; c++)
441 sorted[count[c->c_column]++] = *c;
446 this_col = c->c_column;
450 } while (--nchars > 0 && this_col == endc->c_column);
452 /* if -b only print last character */
456 this_col + c->c_width > endc->c_column)
460 if (this_col > last_col) {
461 int nspace = this_col - last_col;
463 if (compress_spaces && nspace > 1) {
466 ntabs = this_col / 8 - last_col / 8;
468 nspace = this_col & 7;
473 while (--nspace >= 0)
479 if (c->c_set != last_set) {
492 for (i=0; i < c->c_width; i++)
498 last_col += (c-1)->c_width;
504 static LINE *line_freelist;
512 if (!line_freelist) {
513 l = (LINE *)xmalloc((void *)NULL, sizeof(LINE) * NALLOC);
515 for (i = 1; i < NALLOC; i++, l++)
520 line_freelist = l->l_next;
522 memset(l, 0, sizeof(LINE));
526 void free_line(LINE *l)
528 l->l_next = line_freelist;
533 xmalloc(void *p, size_t size)
535 if (!(p = (void *)realloc(p, size))) {
536 (void)fprintf(stderr, "col: %s.\n", strerror(ENOMEM));
544 (void)fprintf(stderr, _("usage: col [-bfpx] [-l nline]\n"));
550 (void)fprintf(stderr, _("col: write error.\n"));
556 (void)fprintf(stderr,
557 _("col: warning: can't back up %s.\n"), line < 0 ?
558 _("past first line") : _("-- line already flushed"));