indent(1): fix building with -fno-common
[dragonfly.git] / usr.bin / indent / io.c
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1/*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
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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.
dc71b7ab 17 * 3. Neither the name of the University nor the names of its contributors
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18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)io.c 8.1 (Berkeley) 6/6/93
7d3cdea1 34 * $FreeBSD: head/usr.bin/indent/io.c 334927 2018-06-10 16:44:18Z pstef $
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35 */
36
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37#include <ctype.h>
38#include <err.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include "indent_globs.h"
43#include "indent.h"
44
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45/* Globals */
46int found_err;
47int n_real_blanklines;
48int prefix_blankline_requested, postfix_blankline_requested;
49int code_lines;
50int had_eof;
51int inhibit_formatting;
52int suppress_blanklines;
53
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54int comment_open;
55static int paren_target;
56static int pad_output(int current, int target);
57
58void
59dump_line(void)
60{ /* dump_line is the routine that actually
61 * effects the printing of the new source. It
62 * prints the label section, followed by the
63 * code section with the appropriate nesting
64 * level, followed by any comments */
e0aca170 65 int cur_col,
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66 target_col = 1;
67 static int not_first_line;
68
69 if (ps.procname[0]) {
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70 ps.ind_level = 0;
71 ps.procname[0] = 0;
72 }
73 if (s_code == e_code && s_lab == e_lab && s_com == e_com) {
74 if (suppress_blanklines > 0)
75 suppress_blanklines--;
76 else {
77 ps.bl_line = true;
78 n_real_blanklines++;
79 }
80 }
81 else if (!inhibit_formatting) {
82 suppress_blanklines = 0;
83 ps.bl_line = false;
84 if (prefix_blankline_requested && not_first_line) {
7d3cdea1 85 if (opt.swallow_optional_blanklines) {
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86 if (n_real_blanklines == 1)
87 n_real_blanklines = 0;
88 }
89 else {
90 if (n_real_blanklines == 0)
91 n_real_blanklines = 1;
92 }
93 }
94 while (--n_real_blanklines >= 0)
95 putc('\n', output);
96 n_real_blanklines = 0;
97 if (ps.ind_level == 0)
98 ps.ind_stmt = 0; /* this is a class A kludge. dont do
99 * additional statement indentation if we are
100 * at bracket level 0 */
101
102 if (e_lab != s_lab || e_code != s_code)
103 ++code_lines; /* keep count of lines with code */
104
105
106 if (e_lab != s_lab) { /* print lab, if any */
107 if (comment_open) {
108 comment_open = 0;
109 fprintf(output, ".*/\n");
110 }
111 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
112 e_lab--;
7d3cdea1 113 *e_lab = '\0';
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114 cur_col = pad_output(1, compute_label_target());
115 if (s_lab[0] == '#' && (strncmp(s_lab, "#else", 5) == 0
116 || strncmp(s_lab, "#endif", 6) == 0)) {
e0aca170 117 char *s = s_lab;
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118 if (e_lab[-1] == '\n') e_lab--;
119 do putc(*s++, output);
120 while (s < e_lab && 'a' <= *s && *s<='z');
121 while ((*s == ' ' || *s == '\t') && s < e_lab)
122 s++;
123 if (s < e_lab)
124 fprintf(output, s[0]=='/' && s[1]=='*' ? "\t%.*s" : "\t/* %.*s */",
ed1a2607 125 (int)(e_lab - s), s);
984263bc 126 }
ed1a2607 127 else fprintf(output, "%.*s", (int)(e_lab - s_lab), s_lab);
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128 cur_col = count_spaces(cur_col, s_lab);
129 }
130 else
131 cur_col = 1; /* there is no label section */
132
133 ps.pcase = false;
134
135 if (s_code != e_code) { /* print code section, if any */
e0aca170 136 char *p;
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137
138 if (comment_open) {
139 comment_open = 0;
140 fprintf(output, ".*/\n");
141 }
142 target_col = compute_code_target();
143 {
e0aca170 144 int i;
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145
146 for (i = 0; i < ps.p_l_follow; i++)
147 if (ps.paren_indents[i] >= 0)
148 ps.paren_indents[i] = -(ps.paren_indents[i] + target_col);
149 }
150 cur_col = pad_output(cur_col, target_col);
151 for (p = s_code; p < e_code; p++)
152 if (*p == (char) 0200)
153 fprintf(output, "%d", target_col * 7);
154 else
155 putc(*p, output);
156 cur_col = count_spaces(cur_col, s_code);
157 }
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158 if (s_com != e_com) { /* print comment, if any */
159 int target = ps.com_col;
160 char *com_st = s_com;
161
162 target += ps.comment_delta;
163 while (*com_st == '\t') /* consider original indentation in
164 * case this is a box comment */
165 com_st++, target += opt.tabsize;
166 while (target <= 0)
167 if (*com_st == ' ')
168 target++, com_st++;
169 else if (*com_st == '\t') {
170 target = opt.tabsize * (1 + (target - 1) / opt.tabsize) + 1;
171 com_st++;
984263bc 172 }
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173 else
174 target = 1;
175 if (cur_col > target) { /* if comment can't fit on this line,
176 * put it on next line */
177 putc('\n', output);
178 cur_col = 1;
179 ++ps.out_lines;
984263bc 180 }
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181 while (e_com > com_st && isspace((unsigned char)e_com[-1]))
182 e_com--;
183 (void)pad_output(cur_col, target);
184 fwrite(com_st, e_com - com_st, 1, output);
185 ps.comment_delta = ps.n_comment_delta;
186 ++ps.com_lines; /* count lines with comments */
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187 }
188 if (ps.use_ff)
189 putc('\014', output);
190 else
191 putc('\n', output);
984263bc 192 ++ps.out_lines;
7d3cdea1 193 if (ps.just_saw_decl == 1 && opt.blanklines_after_declarations) {
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194 prefix_blankline_requested = 1;
195 ps.just_saw_decl = 0;
196 }
197 else
198 prefix_blankline_requested = postfix_blankline_requested;
199 postfix_blankline_requested = 0;
200 }
201 ps.decl_on_line = ps.in_decl; /* if we are in the middle of a
202 * declaration, remember that fact for
203 * proper comment indentation */
204 ps.ind_stmt = ps.in_stmt & ~ps.in_decl; /* next line should be
205 * indented if we have not
206 * completed this stmt and if
207 * we are not in the middle of
208 * a declaration */
209 ps.use_ff = false;
210 ps.dumped_decl_indent = 0;
211 *(e_lab = s_lab) = '\0'; /* reset buffers */
212 *(e_code = s_code) = '\0';
7d3cdea1 213 *(e_com = s_com = combuf + 1) = '\0';
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214 ps.ind_level = ps.i_l_follow;
215 ps.paren_level = ps.p_l_follow;
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216 if (ps.paren_level > 0)
217 paren_target = -ps.paren_indents[ps.paren_level - 1];
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218 not_first_line = 1;
219}
220
221int
222compute_code_target(void)
223{
7d3cdea1 224 int target_col = opt.ind_size * ps.ind_level + 1;
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225
226 if (ps.paren_level)
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227 if (!opt.lineup_to_parens)
228 target_col += opt.continuation_indent *
229 (2 * opt.continuation_indent == opt.ind_size ? 1 : ps.paren_level);
230 else if (opt.lineup_to_parens_always)
231 target_col = paren_target;
984263bc 232 else {
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233 int w;
234 int t = paren_target;
984263bc 235
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236 if ((w = count_spaces(t, s_code) - opt.max_col) > 0
237 && count_spaces(target_col, s_code) <= opt.max_col) {
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238 t -= w + 1;
239 if (t > target_col)
240 target_col = t;
241 }
242 else
243 target_col = t;
244 }
245 else if (ps.ind_stmt)
7d3cdea1 246 target_col += opt.continuation_indent;
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247 return target_col;
248}
249
250int
251compute_label_target(void)
252{
253 return
7d3cdea1 254 ps.pcase ? (int) (case_ind * opt.ind_size) + 1
984263bc 255 : *s_lab == '#' ? 1
7d3cdea1 256 : opt.ind_size * (ps.ind_level - label_offset) + 1;
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257}
258
259
260/*
261 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
262 *
263 * All rights reserved
264 *
265 *
266 * NAME: fill_buffer
267 *
268 * FUNCTION: Reads one block of input into input_buffer
269 *
270 * HISTORY: initial coding November 1976 D A Willcox of CAC 1/7/77 A
271 * Willcox of CAC Added check for switch back to partly full input
272 * buffer from temporary buffer
273 *
274 */
275void
276fill_buffer(void)
277{ /* this routine reads stuff from the input */
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278 char *p;
279 int i;
280 FILE *f = input;
984263bc 281
3ee86c44 282 if (bp_save != NULL) { /* there is a partly filled input buffer left */
283 buf_ptr = bp_save; /* do not read anything, just switch buffers */
984263bc 284 buf_end = be_save;
3ee86c44 285 bp_save = be_save = NULL;
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286 if (buf_ptr < buf_end)
287 return; /* only return if there is really something in
288 * this buffer */
289 }
290 for (p = in_buffer;;) {
291 if (p >= in_buffer_limit) {
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292 int size = (in_buffer_limit - in_buffer) * 2 + 10;
293 int offset = p - in_buffer;
984263bc 294 in_buffer = realloc(in_buffer, size);
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295 if (in_buffer == NULL)
296 errx(1, "input line too long");
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297 p = in_buffer + offset;
298 in_buffer_limit = in_buffer + size - 2;
299 }
300 if ((i = getc(f)) == EOF) {
301 *p++ = ' ';
302 *p++ = '\n';
303 had_eof = true;
304 break;
305 }
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306 if (i != '\0')
307 *p++ = i;
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308 if (i == '\n')
309 break;
310 }
311 buf_ptr = in_buffer;
312 buf_end = p;
7d3cdea1 313 if (p - in_buffer > 2 && p[-2] == '/' && p[-3] == '*') {
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314 if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0)
315 fill_buffer(); /* flush indent error message */
316 else {
317 int com = 0;
318
319 p = in_buffer;
320 while (*p == ' ' || *p == '\t')
321 p++;
322 if (*p == '/' && p[1] == '*') {
323 p += 2;
324 while (*p == ' ' || *p == '\t')
325 p++;
326 if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E'
327 && p[4] == 'N' && p[5] == 'T') {
328 p += 6;
329 while (*p == ' ' || *p == '\t')
330 p++;
331 if (*p == '*')
332 com = 1;
333 else if (*p == 'O') {
334 if (*++p == 'N')
335 p++, com = 1;
336 else if (*p == 'F' && *++p == 'F')
337 p++, com = 2;
338 }
339 while (*p == ' ' || *p == '\t')
340 p++;
341 if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) {
342 if (s_com != e_com || s_lab != e_lab || s_code != e_code)
343 dump_line();
344 if (!(inhibit_formatting = com - 1)) {
345 n_real_blanklines = 0;
346 postfix_blankline_requested = 0;
347 prefix_blankline_requested = 0;
348 suppress_blanklines = 1;
349 }
350 }
351 }
352 }
353 }
354 }
355 if (inhibit_formatting) {
356 p = in_buffer;
357 do
358 putc(*p, output);
359 while (*p++ != '\n');
360 }
361}
362
363/*
364 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
365 *
366 * All rights reserved
367 *
368 *
369 * NAME: pad_output
370 *
371 * FUNCTION: Writes tabs and spaces to move the current column up to the desired
372 * position.
373 *
374 * ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf.
375 *
376 * PARAMETERS: current integer The current column target
377 * nteger The desired column
378 *
379 * RETURNS: Integer value of the new column. (If current >= target, no action is
380 * taken, and current is returned.
381 *
382 * GLOBALS: None
383 *
384 * CALLS: write (sys)
385 *
386 * CALLED BY: dump_line
387 *
388 * HISTORY: initial coding November 1976 D A Willcox of CAC
389 *
390 */
391static int
392pad_output(int current, int target)
393 /* writes tabs and blanks (if necessary) to
394 * get the current output position up to the
395 * target column */
396 /* current: the current column value */
397 /* target: position we want it at */
398{
7d3cdea1 399 int curr; /* internal column pointer */
984263bc 400
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401 if (current >= target)
402 return (current); /* line is already long enough */
403 curr = current;
404 if (opt.use_tabs) {
405 int tcur;
406
407 while ((tcur = opt.tabsize * (1 + (curr - 1) / opt.tabsize) + 1) <= target) {
408 putc('\t', output);
409 curr = tcur;
410 }
984263bc 411 }
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412 while (curr++ < target)
413 putc(' ', output); /* pad with final blanks */
414
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415 return (target);
416}
417
418/*
419 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois
420 *
421 * All rights reserved
422 *
423 *
424 * NAME: count_spaces
425 *
426 * FUNCTION: Find out where printing of a given string will leave the current
427 * character position on output.
428 *
429 * ALGORITHM: Run thru input string and add appropriate values to current
430 * position.
431 *
432 * RETURNS: Integer value of position after printing "buffer" starting in column
433 * "current".
434 *
435 * HISTORY: initial coding November 1976 D A Willcox of CAC
436 *
437 */
438int
7d3cdea1 439count_spaces_until(int cur, char *buffer, char *end)
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440/*
441 * this routine figures out where the character position will be after
442 * printing the text in buffer starting at column "current"
443 */
444{
e0aca170 445 char *buf; /* used to look thru buffer */
984263bc 446
7d3cdea1 447 for (buf = buffer; *buf != '\0' && buf != end; ++buf) {
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448 switch (*buf) {
449
450 case '\n':
451 case 014: /* form feed */
452 cur = 1;
453 break;
454
455 case '\t':
7d3cdea1 456 cur = opt.tabsize * (1 + (cur - 1) / opt.tabsize) + 1;
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457 break;
458
459 case 010: /* backspace */
460 --cur;
461 break;
462
463 default:
464 ++cur;
465 break;
466 } /* end of switch */
467 } /* end of for loop */
468 return (cur);
469}
470
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471int
472count_spaces(int cur, char *buffer)
473{
474 return (count_spaces_until(cur, buffer, NULL));
475}
476
984263bc 477void
ed1a2607 478diag4(int level, const char *msg, int a, int b)
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479{
480 if (level)
481 found_err = 1;
482 if (output == stdout) {
483 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
484 fprintf(stdout, msg, a, b);
485 fprintf(stdout, " */\n");
486 }
487 else {
488 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
489 fprintf(stderr, msg, a, b);
490 fprintf(stderr, "\n");
491 }
492}
493
494void
ed1a2607 495diag3(int level, const char *msg, int a)
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496{
497 if (level)
498 found_err = 1;
499 if (output == stdout) {
500 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
501 fprintf(stdout, msg, a);
502 fprintf(stdout, " */\n");
503 }
504 else {
505 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
506 fprintf(stderr, msg, a);
507 fprintf(stderr, "\n");
508 }
509}
510
511void
ed1a2607 512diag2(int level, const char *msg)
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513{
514 if (level)
515 found_err = 1;
516 if (output == stdout) {
517 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
9462167a 518 fprintf(stdout, "%s", msg);
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519 fprintf(stdout, " */\n");
520 }
521 else {
522 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
9462167a 523 fprintf(stderr, "%s", msg);
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524 fprintf(stderr, "\n");
525 }
526}