io.c revision 330897 
1/*
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1985 Sun Microsystems, Inc.
5 * Copyright (c) 1980, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#if 0
39#ifndef lint
40static char sccsid[] = "@(#)io.c	8.1 (Berkeley) 6/6/93";
41#endif /* not lint */
42#endif
43
44#include <sys/cdefs.h>
45__FBSDID("$FreeBSD: stable/11/usr.bin/indent/io.c 330897 2018-03-14 03:19:51Z eadler $");
46
47#include <ctype.h>
48#include <err.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include "indent_globs.h"
53#include "indent.h"
54
55int         comment_open;
56static int  paren_target;
57static int pad_output(int current, int target);
58
59void
60dump_line(void)
61{				/* dump_line is the routine that actually
62				 * effects the printing of the new source. It
63				 * prints the label section, followed by the
64				 * code section with the appropriate nesting
65				 * level, followed by any comments */
66    int cur_col,
67                target_col = 1;
68    static int  not_first_line;
69
70    if (ps.procname[0]) {
71	if (troff) {
72	    if (comment_open) {
73		comment_open = 0;
74		fprintf(output, ".*/\n");
75	    }
76	    fprintf(output, ".Pr \"%s\"\n", ps.procname);
77	}
78	ps.ind_level = 0;
79	ps.procname[0] = 0;
80    }
81    if (s_code == e_code && s_lab == e_lab && s_com == e_com) {
82	if (suppress_blanklines > 0)
83	    suppress_blanklines--;
84	else {
85	    ps.bl_line = true;
86	    n_real_blanklines++;
87	}
88    }
89    else if (!inhibit_formatting) {
90	suppress_blanklines = 0;
91	ps.bl_line = false;
92	if (prefix_blankline_requested && not_first_line) {
93	    if (swallow_optional_blanklines) {
94		if (n_real_blanklines == 1)
95		    n_real_blanklines = 0;
96	    }
97	    else {
98		if (n_real_blanklines == 0)
99		    n_real_blanklines = 1;
100	    }
101	}
102	while (--n_real_blanklines >= 0)
103	    putc('\n', output);
104	n_real_blanklines = 0;
105	if (ps.ind_level == 0)
106	    ps.ind_stmt = 0;	/* this is a class A kludge. dont do
107				 * additional statement indentation if we are
108				 * at bracket level 0 */
109
110	if (e_lab != s_lab || e_code != s_code)
111	    ++code_lines;	/* keep count of lines with code */
112
113
114	if (e_lab != s_lab) {	/* print lab, if any */
115	    if (comment_open) {
116		comment_open = 0;
117		fprintf(output, ".*/\n");
118	    }
119	    while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
120		e_lab--;
121	    cur_col = pad_output(1, compute_label_target());
122	    if (s_lab[0] == '#' && (strncmp(s_lab, "#else", 5) == 0
123				    || strncmp(s_lab, "#endif", 6) == 0)) {
124		char *s = s_lab;
125		if (e_lab[-1] == '\n') e_lab--;
126		do putc(*s++, output);
127		while (s < e_lab && 'a' <= *s && *s<='z');
128		while ((*s == ' ' || *s == '\t') && s < e_lab)
129		    s++;
130		if (s < e_lab)
131		    fprintf(output, s[0]=='/' && s[1]=='*' ? "\t%.*s" : "\t/* %.*s */",
132			    (int)(e_lab - s), s);
133	    }
134	    else fprintf(output, "%.*s", (int)(e_lab - s_lab), s_lab);
135	    cur_col = count_spaces(cur_col, s_lab);
136	}
137	else
138	    cur_col = 1;	/* there is no label section */
139
140	ps.pcase = false;
141
142	if (s_code != e_code) {	/* print code section, if any */
143	    char *p;
144
145	    if (comment_open) {
146		comment_open = 0;
147		fprintf(output, ".*/\n");
148	    }
149	    target_col = compute_code_target();
150	    {
151		int i;
152
153		for (i = 0; i < ps.p_l_follow; i++)
154		    if (ps.paren_indents[i] >= 0)
155			ps.paren_indents[i] = -(ps.paren_indents[i] + target_col);
156	    }
157	    cur_col = pad_output(cur_col, target_col);
158	    for (p = s_code; p < e_code; p++)
159		if (*p == (char) 0200)
160		    fprintf(output, "%d", target_col * 7);
161		else
162		    putc(*p, output);
163	    cur_col = count_spaces(cur_col, s_code);
164	}
165	if (s_com != e_com) {
166	    if (troff) {
167		int         all_here = 0;
168		char *p;
169
170		if (e_com[-1] == '/' && e_com[-2] == '*')
171		    e_com -= 2, all_here++;
172		while (e_com > s_com && e_com[-1] == ' ')
173		    e_com--;
174		*e_com = 0;
175		p = s_com;
176		while (*p == ' ')
177		    p++;
178		if (p[0] == '/' && p[1] == '*')
179		    p += 2, all_here++;
180		else if (p[0] == '*')
181		    p += p[1] == '/' ? 2 : 1;
182		while (*p == ' ')
183		    p++;
184		if (*p == 0)
185		    goto inhibit_newline;
186		if (comment_open < 2 && ps.box_com) {
187		    comment_open = 0;
188		    fprintf(output, ".*/\n");
189		}
190		if (comment_open == 0) {
191		    if ('a' <= *p && *p <= 'z')
192			*p = *p + 'A' - 'a';
193		    if (e_com - p < 50 && all_here == 2) {
194			char *follow = p;
195			fprintf(output, "\n.nr C! \\w\1");
196			while (follow < e_com) {
197			    switch (*follow) {
198			    case '\n':
199				putc(' ', output);
200			    case 1:
201				break;
202			    case '\\':
203				putc('\\', output);
204			    default:
205				putc(*follow, output);
206			    }
207			    follow++;
208			}
209			putc(1, output);
210		    }
211		    fprintf(output, "\n./* %dp %d %dp\n",
212			    ps.com_col * 7,
213			    (s_code != e_code || s_lab != e_lab) - ps.box_com,
214			    target_col * 7);
215		}
216		comment_open = 1 + ps.box_com;
217		while (*p) {
218		    if (*p == BACKSLASH)
219			putc(BACKSLASH, output);
220		    putc(*p++, output);
221		}
222	    }
223	    else {		/* print comment, if any */
224		int target = ps.com_col;
225		char *com_st = s_com;
226
227		target += ps.comment_delta;
228		while (*com_st == '\t')
229		    com_st++, target += 8;	/* ? */
230		while (target <= 0)
231		    if (*com_st == ' ')
232			target++, com_st++;
233		    else if (*com_st == '\t')
234			target = ((target - 1) & ~7) + 9, com_st++;
235		    else
236			target = 1;
237		if (cur_col > target) {	/* if comment can't fit on this line,
238					 * put it on next line */
239		    putc('\n', output);
240		    cur_col = 1;
241		    ++ps.out_lines;
242		}
243		while (e_com > com_st && isspace(e_com[-1]))
244		    e_com--;
245		cur_col = pad_output(cur_col, target);
246		if (!ps.box_com) {
247		    if (star_comment_cont && (com_st[1] != '*' || e_com <= com_st + 1)) {
248			if (com_st[1] == ' ' && com_st[0] == ' ' && e_com > com_st + 1)
249			    com_st[1] = '*';
250			else
251			    fwrite(" * ", com_st[0] == '\t' ? 2 : com_st[0] == '*' ? 1 : 3, 1, output);
252		    }
253		}
254		fwrite(com_st, e_com - com_st, 1, output);
255		ps.comment_delta = ps.n_comment_delta;
256		cur_col = count_spaces(cur_col, com_st);
257		++ps.com_lines;	/* count lines with comments */
258	    }
259	}
260	if (ps.use_ff)
261	    putc('\014', output);
262	else
263	    putc('\n', output);
264inhibit_newline:
265	++ps.out_lines;
266	if (ps.just_saw_decl == 1 && blanklines_after_declarations) {
267	    prefix_blankline_requested = 1;
268	    ps.just_saw_decl = 0;
269	}
270	else
271	    prefix_blankline_requested = postfix_blankline_requested;
272	postfix_blankline_requested = 0;
273    }
274    ps.decl_on_line = ps.in_decl;	/* if we are in the middle of a
275					 * declaration, remember that fact for
276					 * proper comment indentation */
277    ps.ind_stmt = ps.in_stmt & ~ps.in_decl;	/* next line should be
278						 * indented if we have not
279						 * completed this stmt and if
280						 * we are not in the middle of
281						 * a declaration */
282    ps.use_ff = false;
283    ps.dumped_decl_indent = 0;
284    *(e_lab = s_lab) = '\0';	/* reset buffers */
285    *(e_code = s_code) = '\0';
286    *(e_com = s_com) = '\0';
287    ps.ind_level = ps.i_l_follow;
288    ps.paren_level = ps.p_l_follow;
289    paren_target = -ps.paren_indents[ps.paren_level - 1];
290    not_first_line = 1;
291}
292
293int
294compute_code_target(void)
295{
296    int target_col = ps.ind_size * ps.ind_level + 1;
297
298    if (ps.paren_level)
299	if (!lineup_to_parens)
300	    target_col += continuation_indent
301		* (2 * continuation_indent == ps.ind_size ? 1 : ps.paren_level);
302	else {
303	    int w;
304	    int t = paren_target;
305
306	    if ((w = count_spaces(t, s_code) - max_col) > 0
307		    && count_spaces(target_col, s_code) <= max_col) {
308		t -= w + 1;
309		if (t > target_col)
310		    target_col = t;
311	    }
312	    else
313		target_col = t;
314	}
315    else if (ps.ind_stmt)
316	target_col += continuation_indent;
317    return target_col;
318}
319
320int
321compute_label_target(void)
322{
323    return
324	ps.pcase ? (int) (case_ind * ps.ind_size) + 1
325	: *s_lab == '#' ? 1
326	: ps.ind_size * (ps.ind_level - label_offset) + 1;
327}
328
329
330/*
331 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
332 *
333 * All rights reserved
334 *
335 *
336 * NAME: fill_buffer
337 *
338 * FUNCTION: Reads one block of input into input_buffer
339 *
340 * HISTORY: initial coding 	November 1976	D A Willcox of CAC 1/7/77 A
341 * Willcox of CAC	Added check for switch back to partly full input
342 * buffer from temporary buffer
343 *
344 */
345void
346fill_buffer(void)
347{				/* this routine reads stuff from the input */
348    char *p;
349    int i;
350    FILE *f = input;
351
352    if (bp_save != 0) {		/* there is a partly filled input buffer left */
353	buf_ptr = bp_save;	/* dont read anything, just switch buffers */
354	buf_end = be_save;
355	bp_save = be_save = 0;
356	if (buf_ptr < buf_end)
357	    return;		/* only return if there is really something in
358				 * this buffer */
359    }
360    for (p = in_buffer;;) {
361	if (p >= in_buffer_limit) {
362	    int size = (in_buffer_limit - in_buffer) * 2 + 10;
363	    int offset = p - in_buffer;
364	    in_buffer = realloc(in_buffer, size);
365	    if (in_buffer == NULL)
366		errx(1, "input line too long");
367	    p = in_buffer + offset;
368	    in_buffer_limit = in_buffer + size - 2;
369	}
370	if ((i = getc(f)) == EOF) {
371		*p++ = ' ';
372		*p++ = '\n';
373		had_eof = true;
374		break;
375	}
376	*p++ = i;
377	if (i == '\n')
378		break;
379    }
380    buf_ptr = in_buffer;
381    buf_end = p;
382    if (p[-2] == '/' && p[-3] == '*') {
383	if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0)
384	    fill_buffer();	/* flush indent error message */
385	else {
386	    int         com = 0;
387
388	    p = in_buffer;
389	    while (*p == ' ' || *p == '\t')
390		p++;
391	    if (*p == '/' && p[1] == '*') {
392		p += 2;
393		while (*p == ' ' || *p == '\t')
394		    p++;
395		if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E'
396			&& p[4] == 'N' && p[5] == 'T') {
397		    p += 6;
398		    while (*p == ' ' || *p == '\t')
399			p++;
400		    if (*p == '*')
401			com = 1;
402		    else if (*p == 'O') {
403			if (*++p == 'N')
404			    p++, com = 1;
405			else if (*p == 'F' && *++p == 'F')
406			    p++, com = 2;
407		    }
408		    while (*p == ' ' || *p == '\t')
409			p++;
410		    if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) {
411			if (s_com != e_com || s_lab != e_lab || s_code != e_code)
412			    dump_line();
413			if (!(inhibit_formatting = com - 1)) {
414			    n_real_blanklines = 0;
415			    postfix_blankline_requested = 0;
416			    prefix_blankline_requested = 0;
417			    suppress_blanklines = 1;
418			}
419		    }
420		}
421	    }
422	}
423    }
424    if (inhibit_formatting) {
425	p = in_buffer;
426	do
427	    putc(*p, output);
428	while (*p++ != '\n');
429    }
430}
431
432/*
433 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
434 *
435 * All rights reserved
436 *
437 *
438 * NAME: pad_output
439 *
440 * FUNCTION: Writes tabs and spaces to move the current column up to the desired
441 * position.
442 *
443 * ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf.
444 *
445 * PARAMETERS: current		integer		The current column target
446 * nteger		The desired column
447 *
448 * RETURNS: Integer value of the new column.  (If current >= target, no action is
449 * taken, and current is returned.
450 *
451 * GLOBALS: None
452 *
453 * CALLS: write (sys)
454 *
455 * CALLED BY: dump_line
456 *
457 * HISTORY: initial coding 	November 1976	D A Willcox of CAC
458 *
459 */
460static int
461pad_output(int current, int target)
462			        /* writes tabs and blanks (if necessary) to
463				 * get the current output position up to the
464				 * target column */
465    /* current: the current column value */
466    /* target: position we want it at */
467{
468    int curr;		/* internal column pointer */
469    int tcur;
470
471    if (troff)
472	fprintf(output, "\\h'|%dp'", (target - 1) * 7);
473    else {
474	if (current >= target)
475	    return (current);	/* line is already long enough */
476	curr = current;
477        if (use_tabs) {
478            while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) {
479                putc('\t', output);
480                curr = tcur;
481            }
482        }
483        while (curr++ < target)
484	    putc(' ', output);	/* pad with final blanks */
485    }
486    return (target);
487}
488
489/*
490 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
491 *
492 * All rights reserved
493 *
494 *
495 * NAME: count_spaces
496 *
497 * FUNCTION: Find out where printing of a given string will leave the current
498 * character position on output.
499 *
500 * ALGORITHM: Run thru input string and add appropriate values to current
501 * position.
502 *
503 * RETURNS: Integer value of position after printing "buffer" starting in column
504 * "current".
505 *
506 * HISTORY: initial coding 	November 1976	D A Willcox of CAC
507 *
508 */
509int
510count_spaces(int current, char *buffer)
511/*
512 * this routine figures out where the character position will be after
513 * printing the text in buffer starting at column "current"
514 */
515{
516    char *buf;		/* used to look thru buffer */
517    int cur;		/* current character counter */
518
519    cur = current;
520
521    for (buf = buffer; *buf != '\0'; ++buf) {
522	switch (*buf) {
523
524	case '\n':
525	case 014:		/* form feed */
526	    cur = 1;
527	    break;
528
529	case '\t':
530	    cur = ((cur - 1) & tabmask) + tabsize + 1;
531	    break;
532
533	case 010:		/* backspace */
534	    --cur;
535	    break;
536
537	default:
538	    ++cur;
539	    break;
540	}			/* end of switch */
541    }				/* end of for loop */
542    return (cur);
543}
544
545void
546diag4(int level, const char *msg, int a, int b)
547{
548    if (level)
549	found_err = 1;
550    if (output == stdout) {
551	fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
552	fprintf(stdout, msg, a, b);
553	fprintf(stdout, " */\n");
554    }
555    else {
556	fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
557	fprintf(stderr, msg, a, b);
558	fprintf(stderr, "\n");
559    }
560}
561
562void
563diag3(int level, const char *msg, int a)
564{
565    if (level)
566	found_err = 1;
567    if (output == stdout) {
568	fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
569	fprintf(stdout, msg, a);
570	fprintf(stdout, " */\n");
571    }
572    else {
573	fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
574	fprintf(stderr, msg, a);
575	fprintf(stderr, "\n");
576    }
577}
578
579void
580diag2(int level, const char *msg)
581{
582    if (level)
583	found_err = 1;
584    if (output == stdout) {
585	fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
586	fprintf(stdout, "%s", msg);
587	fprintf(stdout, " */\n");
588    }
589    else {
590	fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
591	fprintf(stderr, "%s", msg);
592	fprintf(stderr, "\n");
593    }
594}
595
596void
597writefdef(struct fstate *f, int nm)
598{
599    fprintf(output, ".ds f%c %s\n.nr s%c %d\n",
600	    nm, f->font, nm, f->size);
601}
602
603char *
604chfont(struct fstate *of, struct fstate *nf, char *s)
605{
606    if (of->font[0] != nf->font[0]
607	    || of->font[1] != nf->font[1]) {
608	*s++ = '\\';
609	*s++ = 'f';
610	if (nf->font[1]) {
611	    *s++ = '(';
612	    *s++ = nf->font[0];
613	    *s++ = nf->font[1];
614	}
615	else
616	    *s++ = nf->font[0];
617    }
618    if (nf->size != of->size) {
619	*s++ = '\\';
620	*s++ = 's';
621	if (nf->size < of->size) {
622	    *s++ = '-';
623	    *s++ = '0' + of->size - nf->size;
624	}
625	else {
626	    *s++ = '+';
627	    *s++ = '0' + nf->size - of->size;
628	}
629    }
630    return s;
631}
632
633void
634parsefont(struct fstate *f, const char *s0)
635{
636    const char *s = s0;
637    int         sizedelta = 0;
638
639    bzero(f, sizeof *f);
640    while (*s) {
641	if (isdigit(*s))
642	    f->size = f->size * 10 + *s - '0';
643	else if (isupper(*s))
644	    if (f->font[0])
645		f->font[1] = *s;
646	    else
647		f->font[0] = *s;
648	else if (*s == 'c')
649	    f->allcaps = 1;
650	else if (*s == '+')
651	    sizedelta++;
652	else if (*s == '-')
653	    sizedelta--;
654	else {
655	    errx(1, "bad font specification: %s", s0);
656	}
657	s++;
658    }
659    if (f->font[0] == 0)
660	f->font[0] = 'R';
661    if (bodyf.size == 0)
662	bodyf.size = 11;
663    if (f->size == 0)
664	f->size = bodyf.size + sizedelta;
665    else if (sizedelta > 0)
666	f->size += bodyf.size;
667    else
668	f->size = bodyf.size - f->size;
669}
670