diff options
Diffstat (limited to 'usr.bin/indent/pr_comment.c')
| -rw-r--r-- | usr.bin/indent/pr_comment.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/usr.bin/indent/pr_comment.c b/usr.bin/indent/pr_comment.c new file mode 100644 index 0000000..2d4bc90 --- /dev/null +++ b/usr.bin/indent/pr_comment.c @@ -0,0 +1,418 @@ +/* + * Copyright (c) 1985 Sun Microsystems, Inc. + * Copyright (c) 1980, 1993 + * The Regents of the University of California. All rights reserved. + * 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. + */ + +#ifndef lint +static char sccsid[] = "@(#)pr_comment.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include <stdio.h> +#include <stdlib.h> +#include "indent_globs.h" + +/* + * NAME: + * pr_comment + * + * FUNCTION: + * This routine takes care of scanning and printing comments. + * + * ALGORITHM: + * 1) Decide where the comment should be aligned, and if lines should + * be broken. + * 2) If lines should not be broken and filled, just copy up to end of + * comment. + * 3) If lines should be filled, then scan thru input_buffer copying + * characters to com_buf. Remember where the last blank, tab, or + * newline was. When line is filled, print up to last blank and + * continue copying. + * + * HISTORY: + * November 1976 D A Willcox of CAC Initial coding + * 12/6/76 D A Willcox of CAC Modification to handle + * UNIX-style comments + * + */ + +/* + * this routine processes comments. It makes an attempt to keep comments from + * going over the max line length. If a line is too long, it moves everything + * from the last blank to the next comment line. Blanks and tabs from the + * beginning of the input line are removed + */ + + +pr_comment() +{ + int now_col; /* column we are in now */ + int adj_max_col; /* Adjusted max_col for when we decide to + * spill comments over the right margin */ + char *last_bl; /* points to the last blank in the output + * buffer */ + char *t_ptr; /* used for moving string */ + int unix_comment; /* tri-state variable used to decide if it is + * a unix-style comment. 0 means only blanks + * since /*, 1 means regular style comment, 2 + * means unix style comment */ + int break_delim = comment_delimiter_on_blankline; + int l_just_saw_decl = ps.just_saw_decl; + /* + * int ps.last_nl = 0; /* true iff the last significant thing + * weve seen is a newline + */ + int one_liner = 1; /* true iff this comment is a one-liner */ + adj_max_col = max_col; + ps.just_saw_decl = 0; + last_bl = 0; /* no blanks found so far */ + ps.box_com = false; /* at first, assume that we are not in + * a boxed comment or some other + * comment that should not be touched */ + ++ps.out_coms; /* keep track of number of comments */ + unix_comment = 1; /* set flag to let us figure out if there is a + * unix-style comment ** DISABLED: use 0 to + * reenable this hack! */ + + /* Figure where to align and how to treat the comment */ + + if (ps.col_1 && !format_col1_comments) { /* if comment starts in column + * 1 it should not be touched */ + ps.box_com = true; + ps.com_col = 1; + } + else { + if (*buf_ptr == '-' || *buf_ptr == '*') { + ps.box_com = true; /* a comment with a '-' or '*' immediately + * after the /* is assumed to be a boxed + * comment */ + break_delim = 0; + } + if ( /* ps.bl_line && */ (s_lab == e_lab) && (s_code == e_code)) { + /* klg: check only if this line is blank */ + /* + * If this (*and previous lines are*) blank, dont put comment way + * out at left + */ + ps.com_col = (ps.ind_level - ps.unindent_displace) * ps.ind_size + 1; + adj_max_col = block_comment_max_col; + if (ps.com_col <= 1) + ps.com_col = 1 + !format_col1_comments; + } + else { + register target_col; + break_delim = 0; + if (s_code != e_code) + target_col = count_spaces(compute_code_target(), s_code); + else { + target_col = 1; + if (s_lab != e_lab) + target_col = count_spaces(compute_label_target(), s_lab); + } + ps.com_col = ps.decl_on_line || ps.ind_level == 0 ? ps.decl_com_ind : ps.com_ind; + if (ps.com_col < target_col) + ps.com_col = ((target_col + 7) & ~7) + 1; + if (ps.com_col + 24 > adj_max_col) + adj_max_col = ps.com_col + 24; + } + } + if (ps.box_com) { + buf_ptr[-2] = 0; + ps.n_comment_delta = 1 - count_spaces(1, in_buffer); + buf_ptr[-2] = '/'; + } + else { + ps.n_comment_delta = 0; + while (*buf_ptr == ' ' || *buf_ptr == '\t') + buf_ptr++; + } + ps.comment_delta = 0; + *e_com++ = '/'; /* put '/*' into buffer */ + *e_com++ = '*'; + if (*buf_ptr != ' ' && !ps.box_com) + *e_com++ = ' '; + + *e_com = '\0'; + if (troff) { + now_col = 1; + adj_max_col = 80; + } + else + now_col = count_spaces(ps.com_col, s_com); /* figure what column we + * would be in if we + * printed the comment + * now */ + + /* Start to copy the comment */ + + while (1) { /* this loop will go until the comment is + * copied */ + if (*buf_ptr > 040 && *buf_ptr != '*') + ps.last_nl = 0; + CHECK_SIZE_COM; + switch (*buf_ptr) { /* this checks for various spcl cases */ + case 014: /* check for a form feed */ + if (!ps.box_com) { /* in a text comment, break the line here */ + ps.use_ff = true; + /* fix so dump_line uses a form feed */ + dump_line(); + last_bl = 0; + *e_com++ = ' '; + *e_com++ = '*'; + *e_com++ = ' '; + while (*++buf_ptr == ' ' || *buf_ptr == '\t'); + } + else { + if (++buf_ptr >= buf_end) + fill_buffer(); + *e_com++ = 014; + } + break; + + case '\n': + if (had_eof) { /* check for unexpected eof */ + printf("Unterminated comment\n"); + *e_com = '\0'; + dump_line(); + return; + } + one_liner = 0; + if (ps.box_com || ps.last_nl) { /* if this is a boxed comment, + * we dont ignore the newline */ + if (s_com == e_com) { + *e_com++ = ' '; + *e_com++ = ' '; + } + *e_com = '\0'; + if (!ps.box_com && e_com - s_com > 3) { + if (break_delim == 1 && s_com[0] == '/' + && s_com[1] == '*' && s_com[2] == ' ') { + char *t = e_com; + break_delim = 2; + e_com = s_com + 2; + *e_com = 0; + if (blanklines_before_blockcomments) + prefix_blankline_requested = 1; + dump_line(); + e_com = t; + s_com[0] = s_com[1] = s_com[2] = ' '; + } + dump_line(); + CHECK_SIZE_COM; + *e_com++ = ' '; + *e_com++ = ' '; + } + dump_line(); + now_col = ps.com_col; + } + else { + ps.last_nl = 1; + if (unix_comment != 1) { /* we not are in unix_style + * comment */ + if (unix_comment == 0 && s_code == e_code) { + /* + * if it is a UNIX-style comment, ignore the + * requirement that previous line be blank for + * unindention + */ + ps.com_col = (ps.ind_level - ps.unindent_displace) * ps.ind_size + 1; + if (ps.com_col <= 1) + ps.com_col = 2; + } + unix_comment = 2; /* permanently remember that we are in + * this type of comment */ + dump_line(); + ++line_no; + now_col = ps.com_col; + *e_com++ = ' '; + /* + * fix so that the star at the start of the line will line + * up + */ + do /* flush leading white space */ + if (++buf_ptr >= buf_end) + fill_buffer(); + while (*buf_ptr == ' ' || *buf_ptr == '\t'); + break; + } + if (*(e_com - 1) == ' ' || *(e_com - 1) == '\t') + last_bl = e_com - 1; + /* + * if there was a space at the end of the last line, remember + * where it was + */ + else { /* otherwise, insert one */ + last_bl = e_com; + CHECK_SIZE_COM; + *e_com++ = ' '; + ++now_col; + } + } + ++line_no; /* keep track of input line number */ + if (!ps.box_com) { + int nstar = 1; + do { /* flush any blanks and/or tabs at start of + * next line */ + if (++buf_ptr >= buf_end) + fill_buffer(); + if (*buf_ptr == '*' && --nstar >= 0) { + if (++buf_ptr >= buf_end) + fill_buffer(); + if (*buf_ptr == '/') + goto end_of_comment; + } + } while (*buf_ptr == ' ' || *buf_ptr == '\t'); + } + else if (++buf_ptr >= buf_end) + fill_buffer(); + break; /* end of case for newline */ + + case '*': /* must check for possibility of being at end + * of comment */ + if (++buf_ptr >= buf_end) /* get to next char after * */ + fill_buffer(); + + if (unix_comment == 0) /* set flag to show we are not in + * unix-style comment */ + unix_comment = 1; + + if (*buf_ptr == '/') { /* it is the end!!! */ + end_of_comment: + if (++buf_ptr >= buf_end) + fill_buffer(); + + if (*(e_com - 1) != ' ' && !ps.box_com) { /* insure blank before + * end */ + *e_com++ = ' '; + ++now_col; + } + if (break_delim == 1 && !one_liner && s_com[0] == '/' + && s_com[1] == '*' && s_com[2] == ' ') { + char *t = e_com; + break_delim = 2; + e_com = s_com + 2; + *e_com = 0; + if (blanklines_before_blockcomments) + prefix_blankline_requested = 1; + dump_line(); + e_com = t; + s_com[0] = s_com[1] = s_com[2] = ' '; + } + if (break_delim == 2 && e_com > s_com + 3 + /* now_col > adj_max_col - 2 && !ps.box_com */ ) { + *e_com = '\0'; + dump_line(); + now_col = ps.com_col; + } + CHECK_SIZE_COM; + *e_com++ = '*'; + *e_com++ = '/'; + *e_com = '\0'; + ps.just_saw_decl = l_just_saw_decl; + return; + } + else { /* handle isolated '*' */ + *e_com++ = '*'; + ++now_col; + } + break; + default: /* we have a random char */ + if (unix_comment == 0 && *buf_ptr != ' ' && *buf_ptr != '\t') + unix_comment = 1; /* we are not in unix-style comment */ + + *e_com = *buf_ptr++; + if (buf_ptr >= buf_end) + fill_buffer(); + + if (*e_com == '\t') /* keep track of column */ + now_col = ((now_col - 1) & tabmask) + tabsize + 1; + else if (*e_com == '\b') /* this is a backspace */ + --now_col; + else + ++now_col; + + if (*e_com == ' ' || *e_com == '\t') + last_bl = e_com; + /* remember we saw a blank */ + + ++e_com; + if (now_col > adj_max_col && !ps.box_com && unix_comment == 1 && e_com[-1] > ' ') { + /* + * the comment is too long, it must be broken up + */ + if (break_delim == 1 && s_com[0] == '/' + && s_com[1] == '*' && s_com[2] == ' ') { + char *t = e_com; + break_delim = 2; + e_com = s_com + 2; + *e_com = 0; + if (blanklines_before_blockcomments) + prefix_blankline_requested = 1; + dump_line(); + e_com = t; + s_com[0] = s_com[1] = s_com[2] = ' '; + } + if (last_bl == 0) { /* we have seen no blanks */ + last_bl = e_com; /* fake it */ + *e_com++ = ' '; + } + *e_com = '\0'; /* print what we have */ + *last_bl = '\0'; + while (last_bl > s_com && last_bl[-1] < 040) + *--last_bl = 0; + e_com = last_bl; + dump_line(); + + *e_com++ = ' '; /* add blanks for continuation */ + *e_com++ = ' '; + *e_com++ = ' '; + + t_ptr = last_bl + 1; + last_bl = 0; + if (t_ptr >= e_com) { + while (*t_ptr == ' ' || *t_ptr == '\t') + t_ptr++; + while (*t_ptr != '\0') { /* move unprinted part of + * comment down in buffer */ + if (*t_ptr == ' ' || *t_ptr == '\t') + last_bl = e_com; + *e_com++ = *t_ptr++; + } + } + *e_com = '\0'; + now_col = count_spaces(ps.com_col, s_com); /* recompute current + * position */ + } + break; + } + } +} |
