2 * Copyright (c) 1985 Sun Microsystems, Inc.
3 * Copyright (c) 1980, 1993
4 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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17 * This product includes software developed by the University of
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20 * may be used to endorse or promote products derived from this software
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37 static char sccsid[] = "@(#)pr_comment.c 8.1 (Berkeley) 6/6/93";
42 #include "indent_globs.h"
49 * This routine takes care of scanning and printing comments.
52 * 1) Decide where the comment should be aligned, and if lines should
54 * 2) If lines should not be broken and filled, just copy up to end of
56 * 3) If lines should be filled, then scan thru input_buffer copying
57 * characters to com_buf. Remember where the last blank, tab, or
58 * newline was. When line is filled, print up to last blank and
62 * November 1976 D A Willcox of CAC Initial coding
63 * 12/6/76 D A Willcox of CAC Modification to handle
69 * this routine processes comments. It makes an attempt to keep comments from
70 * going over the max line length. If a line is too long, it moves everything
71 * from the last blank to the next comment line. Blanks and tabs from the
72 * beginning of the input line are removed
78 int now_col; /* column we are in now */
79 int adj_max_col; /* Adjusted max_col for when we decide to
80 * spill comments over the right margin */
81 char *last_bl; /* points to the last blank in the output
83 char *t_ptr; /* used for moving string */
84 int unix_comment; /* tri-state variable used to decide if it is
85 * a unix-style comment. 0 means only blanks
86 * since /*, 1 means regular style comment, 2
87 * means unix style comment */
88 int break_delim = comment_delimiter_on_blankline;
89 int l_just_saw_decl = ps.just_saw_decl;
91 * int ps.last_nl = 0; /* true iff the last significant thing
92 * weve seen is a newline
94 int one_liner = 1; /* true iff this comment is a one-liner */
95 adj_max_col = max_col;
97 last_bl = 0; /* no blanks found so far */
98 ps.box_com = false; /* at first, assume that we are not in
99 * a boxed comment or some other
100 * comment that should not be touched */
101 ++ps.out_coms; /* keep track of number of comments */
102 unix_comment = 1; /* set flag to let us figure out if there is a
103 * unix-style comment ** DISABLED: use 0 to
104 * reenable this hack! */
106 /* Figure where to align and how to treat the comment */
108 if (ps.col_1 && !format_col1_comments) { /* if comment starts in column
109 * 1 it should not be touched */
114 if (*buf_ptr == '-' || *buf_ptr == '*') {
115 ps.box_com = true; /* a comment with a '-' or '*' immediately
116 * after the /* is assumed to be a boxed
120 if ( /* ps.bl_line && */ (s_lab == e_lab) && (s_code == e_code)) {
121 /* klg: check only if this line is blank */
123 * If this (*and previous lines are*) blank, dont put comment way
126 ps.com_col = (ps.ind_level - ps.unindent_displace) * ps.ind_size + 1;
127 adj_max_col = block_comment_max_col;
129 ps.com_col = 1 + !format_col1_comments;
134 if (s_code != e_code)
135 target_col = count_spaces(compute_code_target(), s_code);
139 target_col = count_spaces(compute_label_target(), s_lab);
141 ps.com_col = ps.decl_on_line || ps.ind_level == 0 ? ps.decl_com_ind : ps.com_ind;
142 if (ps.com_col < target_col)
143 ps.com_col = ((target_col + 7) & ~7) + 1;
144 if (ps.com_col + 24 > adj_max_col)
145 adj_max_col = ps.com_col + 24;
150 ps.n_comment_delta = 1 - count_spaces(1, in_buffer);
154 ps.n_comment_delta = 0;
155 while (*buf_ptr == ' ' || *buf_ptr == '\t')
158 ps.comment_delta = 0;
159 *e_com++ = '/'; /* put '/*' into buffer */
161 if (*buf_ptr != ' ' && !ps.box_com)
170 now_col = count_spaces(ps.com_col, s_com); /* figure what column we
172 * printed the comment
175 /* Start to copy the comment */
177 while (1) { /* this loop will go until the comment is
179 if (*buf_ptr > 040 && *buf_ptr != '*')
182 switch (*buf_ptr) { /* this checks for various spcl cases */
183 case 014: /* check for a form feed */
184 if (!ps.box_com) { /* in a text comment, break the line here */
186 /* fix so dump_line uses a form feed */
192 while (*++buf_ptr == ' ' || *buf_ptr == '\t');
195 if (++buf_ptr >= buf_end)
202 if (had_eof) { /* check for unexpected eof */
203 printf("Unterminated comment\n");
209 if (ps.box_com || ps.last_nl) { /* if this is a boxed comment,
210 * we dont ignore the newline */
211 if (s_com == e_com) {
216 if (!ps.box_com && e_com - s_com > 3) {
217 if (break_delim == 1 && s_com[0] == '/'
218 && s_com[1] == '*' && s_com[2] == ' ') {
223 if (blanklines_before_blockcomments)
224 prefix_blankline_requested = 1;
227 s_com[0] = s_com[1] = s_com[2] = ' ';
235 now_col = ps.com_col;
239 if (unix_comment != 1) { /* we not are in unix_style
241 if (unix_comment == 0 && s_code == e_code) {
243 * if it is a UNIX-style comment, ignore the
244 * requirement that previous line be blank for
247 ps.com_col = (ps.ind_level - ps.unindent_displace) * ps.ind_size + 1;
251 unix_comment = 2; /* permanently remember that we are in
252 * this type of comment */
255 now_col = ps.com_col;
258 * fix so that the star at the start of the line will line
261 do /* flush leading white space */
262 if (++buf_ptr >= buf_end)
264 while (*buf_ptr == ' ' || *buf_ptr == '\t');
267 if (*(e_com - 1) == ' ' || *(e_com - 1) == '\t')
270 * if there was a space at the end of the last line, remember
273 else { /* otherwise, insert one */
280 ++line_no; /* keep track of input line number */
283 do { /* flush any blanks and/or tabs at start of
285 if (++buf_ptr >= buf_end)
287 if (*buf_ptr == '*' && --nstar >= 0) {
288 if (++buf_ptr >= buf_end)
293 } while (*buf_ptr == ' ' || *buf_ptr == '\t');
295 else if (++buf_ptr >= buf_end)
297 break; /* end of case for newline */
299 case '*': /* must check for possibility of being at end
301 if (++buf_ptr >= buf_end) /* get to next char after * */
304 if (unix_comment == 0) /* set flag to show we are not in
305 * unix-style comment */
308 if (*buf_ptr == '/') { /* it is the end!!! */
310 if (++buf_ptr >= buf_end)
313 if (*(e_com - 1) != ' ' && !ps.box_com) { /* insure blank before
318 if (break_delim == 1 && !one_liner && s_com[0] == '/'
319 && s_com[1] == '*' && s_com[2] == ' ') {
324 if (blanklines_before_blockcomments)
325 prefix_blankline_requested = 1;
328 s_com[0] = s_com[1] = s_com[2] = ' ';
330 if (break_delim == 2 && e_com > s_com + 3
331 /* now_col > adj_max_col - 2 && !ps.box_com */ ) {
334 now_col = ps.com_col;
340 ps.just_saw_decl = l_just_saw_decl;
343 else { /* handle isolated '*' */
348 default: /* we have a random char */
349 if (unix_comment == 0 && *buf_ptr != ' ' && *buf_ptr != '\t')
350 unix_comment = 1; /* we are not in unix-style comment */
353 if (buf_ptr >= buf_end)
356 if (*e_com == '\t') /* keep track of column */
357 now_col = ((now_col - 1) & tabmask) + tabsize + 1;
358 else if (*e_com == '\b') /* this is a backspace */
363 if (*e_com == ' ' || *e_com == '\t')
365 /* remember we saw a blank */
368 if (now_col > adj_max_col && !ps.box_com && unix_comment == 1 && e_com[-1] > ' ') {
370 * the comment is too long, it must be broken up
372 if (break_delim == 1 && s_com[0] == '/'
373 && s_com[1] == '*' && s_com[2] == ' ') {
378 if (blanklines_before_blockcomments)
379 prefix_blankline_requested = 1;
382 s_com[0] = s_com[1] = s_com[2] = ' ';
384 if (last_bl == 0) { /* we have seen no blanks */
385 last_bl = e_com; /* fake it */
388 *e_com = '\0'; /* print what we have */
390 while (last_bl > s_com && last_bl[-1] < 040)
395 *e_com++ = ' '; /* add blanks for continuation */
401 if (t_ptr >= e_com) {
402 while (*t_ptr == ' ' || *t_ptr == '\t')
404 while (*t_ptr != '\0') { /* move unprinted part of
405 * comment down in buffer */
406 if (*t_ptr == ' ' || *t_ptr == '\t')
412 now_col = count_spaces(ps.com_col, s_com); /* recompute current