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indent/io.c

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/* $OpenBSD: io.c,v 1.14 2015/09/27 17:00:46 guenther Exp $ */
/*
* Copyright (c) 1985 Sun Microsystems, Inc.
* Copyright (c) 1980, 1993 The Regents of the University of California.
* Copyright (c) 1976 Board of Trustees of the University of Illinois.
* 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. 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.
*/
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <err.h>
#include "indent_globs.h"
int comment_open;
static int paren_target;
void
dump_line(void)
{ /* dump_line is the routine that actually
* effects the printing of the new source. It
* prints the label section, followed by the
* code section with the appropriate nesting
* level, followed by any comments */
int cur_col, target_col;
static int not_first_line;
if (ps.procname[0]) {
if (troff) {
if (comment_open) {
comment_open = 0;
fprintf(output, ".*/\n");
}
fprintf(output, ".Pr \"%s\"\n", ps.procname);
}
ps.ind_level = 0;
ps.procname[0] = 0;
}
if (s_code == e_code && s_lab == e_lab && s_com == e_com) {
if (suppress_blanklines > 0)
suppress_blanklines--;
else {
ps.bl_line = true;
n_real_blanklines++;
}
}
else if (!inhibit_formatting) {
suppress_blanklines = 0;
ps.bl_line = false;
if (prefix_blankline_requested && not_first_line) {
if (swallow_optional_blanklines) {
if (n_real_blanklines == 1)
n_real_blanklines = 0;
} else {
if (n_real_blanklines == 0)
n_real_blanklines = 1;
}
}
while (--n_real_blanklines >= 0)
putc('\n', output);
n_real_blanklines = 0;
if (ps.ind_level == 0)
ps.ind_stmt = 0; /* this is a class A kludge. dont do
* additional statement indentation if we are
* at bracket level 0 */
if (e_lab != s_lab || e_code != s_code)
++code_lines; /* keep count of lines with code */
if (e_lab != s_lab) { /* print lab, if any */
if (comment_open) {
comment_open = 0;
fprintf(output, ".*/\n");
}
while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
e_lab--;
cur_col = pad_output(1, compute_label_target());
if (s_lab[0] == '#' && (strncmp(s_lab, "#else", 5) == 0
|| strncmp(s_lab, "#endif", 6) == 0)) {
char *s = s_lab;
if (e_lab[-1] == '\n')
e_lab--;
do
putc(*s++, output);
while (s < e_lab && 'a' <= *s && *s<='z');
while ((*s == ' ' || *s == '\t') && s < e_lab)
s++;
if (s < e_lab)
fprintf(output, s[0]=='/' && s[1]=='*' ? "\t%.*s" : "\t/* %.*s */",
(int)(e_lab - s), s);
}
else fprintf(output, "%.*s", (int)(e_lab - s_lab), s_lab);
cur_col = count_spaces(cur_col, s_lab);
}
else
cur_col = 1; /* there is no label section */
ps.pcase = false;
if (s_code != e_code) { /* print code section, if any */
char *p;
if (comment_open) {
comment_open = 0;
fprintf(output, ".*/\n");
}
target_col = compute_code_target();
{
int i;
for (i = 0; i < ps.p_l_follow; i++)
if (ps.paren_indents[i] >= 0)
ps.paren_indents[i] = -(ps.paren_indents[i] + target_col);
}
cur_col = pad_output(cur_col, target_col);
for (p = s_code; p < e_code; p++)
if (*p == (char) 0200)
fprintf(output, "%d", target_col * 7);
else
putc(*p, output);
cur_col = count_spaces(cur_col, s_code);
}
if (s_com != e_com) {
if (troff) {
int all_here = 0;
char *p;
if (e_com[-1] == '/' && e_com[-2] == '*')
e_com -= 2, all_here++;
while (e_com > s_com && e_com[-1] == ' ')
e_com--;
*e_com = 0;
p = s_com;
while (*p == ' ')
p++;
if (p[0] == '/' && p[1] == '*')
p += 2, all_here++;
else if (p[0] == '*')
p += p[1] == '/' ? 2 : 1;
while (*p == ' ')
p++;
if (*p == 0)
goto inhibit_newline;
if (comment_open < 2 && ps.box_com) {
comment_open = 0;
fprintf(output, ".*/\n");
}
if (comment_open == 0) {
if ('a' <= *p && *p <= 'z')
*p = *p + 'A' - 'a';
if (e_com - p < 50 && all_here == 2) {
char *follow = p;
fprintf(output, "\n.nr C! \\w\1");
while (follow < e_com) {
switch (*follow) {
case '\n':
putc(' ', output);
case 1:
break;
case '\\':
putc('\\', output);
default:
putc(*follow, output);
}
follow++;
}
putc(1, output);
}
fprintf(output, "\n./* %dp %d %dp\n",
ps.com_col * 7,
(s_code != e_code || s_lab != e_lab) - ps.box_com,
target_col * 7);
}
comment_open = 1 + ps.box_com;
while (*p) {
if (*p == BACKSLASH)
putc(BACKSLASH, output);
putc(*p++, output);
}
} else { /* print comment, if any */
int target = ps.com_col;
char *com_st = s_com;
target += ps.comment_delta;
while (*com_st == '\t')
com_st++, target += 8; /* ? */
while (target <= 0)
if (*com_st == ' ')
target++, com_st++;
else if (*com_st == '\t')
target = ((target - 1) & ~7) + 9, com_st++;
else
target = 1;
if (cur_col > target) { /* if comment cant fit on this line,
* put it on next line */
putc('\n', output);
cur_col = 1;
++ps.out_lines;
}
while (e_com > com_st && isspace((unsigned char)e_com[-1]))
e_com--;
cur_col = pad_output(cur_col, target);
if (!ps.box_com) {
if (star_comment_cont && (com_st[1] != '*' || e_com <= com_st + 1)) {
if (com_st[1] == ' ' && com_st[0] == ' ' && e_com > com_st + 1)
com_st[1] = '*';
else
fwrite(" * ", com_st[0] == '\t' ? 2 : com_st[0] == '*' ? 1 : 3, 1, output);
}
}
fwrite(com_st, e_com - com_st, 1, output);
ps.comment_delta = ps.n_comment_delta;
cur_col = count_spaces(cur_col, com_st);
++ps.com_lines; /* count lines with comments */
}
}
if (ps.use_ff)
putc('\014', output);
else
putc('\n', output);
inhibit_newline:
++ps.out_lines;
if (ps.just_saw_decl == 1 && blanklines_after_declarations) {
prefix_blankline_requested = 1;
ps.just_saw_decl = 0;
}
else
prefix_blankline_requested = postfix_blankline_requested;
postfix_blankline_requested = 0;
}
ps.decl_on_line = ps.in_decl; /* if we are in the middle of a
* declaration, remember that fact for
* proper comment indentation */
ps.ind_stmt = ps.in_stmt & ~ps.in_decl; /* next line should be
* indented if we have not
* completed this stmt and if
* we are not in the middle of
* a declaration */
ps.use_ff = false;
ps.dumped_decl_indent = 0;
*(e_lab = s_lab) = '\0'; /* reset buffers */
*(e_code = s_code) = '\0';
*(e_com = s_com) = '\0';
ps.ind_level = ps.i_l_follow;
ps.paren_level = ps.p_l_follow;
paren_target = -ps.paren_indents[ps.paren_level - 1];
not_first_line = 1;
return;
}
int
compute_code_target(void)
{
int target_col;
target_col = ps.ind_size * ps.ind_level + 1;
if (ps.paren_level)
if (!lineup_to_parens)
target_col += continuation_indent * ps.paren_level;
else {
int w;
int t = paren_target;
if ((w = count_spaces(t, s_code) - max_col) > 0
&& count_spaces(target_col, s_code) <= max_col) {
t -= w + 1;
if (t > target_col)
target_col = t;
}
else
target_col = t;
}
else if (ps.ind_stmt)
target_col += continuation_indent;
return target_col;
}
int
compute_label_target(void)
{
return
ps.pcase ? (int) (case_ind * ps.ind_size) + 1
: *s_lab == '#' ? 1
: ps.ind_size * (ps.ind_level - label_offset) + 1;
}
/*
* Copyright (C) 1976 by the Board of Trustees of the University of Illinois
*
* All rights reserved
*
*
* NAME: fill_buffer
*
* FUNCTION: Reads one block of input into input_buffer
*
* HISTORY: initial coding November 1976 D A Willcox of CAC 1/7/77 A
* Willcox of CAC Added check for switch back to partly full input
* buffer from temporary buffer
*
*/
void
fill_buffer(void)
{ /* this routine reads stuff from the input */
char *p, *buf2;
int i;
FILE *f = input;
if (bp_save != 0) { /* there is a partly filled input buffer left */
buf_ptr = bp_save; /* dont read anything, just switch buffers */
buf_end = be_save;
bp_save = be_save = 0;
if (buf_ptr < buf_end)
return; /* only return if there is really something in
* this buffer */
}
for (p = in_buffer;;) {
if (p >= in_buffer_limit) {
int size = (in_buffer_limit - in_buffer) * 2 + 10;
int offset = p - in_buffer;
buf2 = realloc(in_buffer, size);
if (buf2 == NULL)
errx(1, "input line too long");
in_buffer = buf2;
p = in_buffer + offset;
in_buffer_limit = in_buffer + size - 2;
}
if ((i = getc(f)) == EOF) {
*p++ = ' ';
*p++ = '\n';
had_eof = true;
break;
}
*p++ = i;
if (i == '\n')
break;
}
buf_ptr = in_buffer;
buf_end = p;
if (p - 3 >= in_buffer && p[-2] == '/' && p[-3] == '*') {
if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0)
fill_buffer(); /* flush indent error message */
else {
int com = 0;
p = in_buffer;
while (*p == ' ' || *p == '\t')
p++;
if (*p == '/' && p[1] == '*') {
p += 2;
while (*p == ' ' || *p == '\t')
p++;
if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E'
&& p[4] == 'N' && p[5] == 'T') {
p += 6;
while (*p == ' ' || *p == '\t')
p++;
if (*p == '*')
com = 1;
else if (*p == 'O') {
if (*++p == 'N')
p++, com = 1;
else if (*p == 'F' && *++p == 'F')
p++, com = 2;
}
while (*p == ' ' || *p == '\t')
p++;
if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) {
if (s_com != e_com || s_lab != e_lab || s_code != e_code)
dump_line();
if (!(inhibit_formatting = com - 1)) {
n_real_blanklines = 0;
postfix_blankline_requested = 0;
prefix_blankline_requested = 0;
suppress_blanklines = 1;
}
}
}
}
}
}
if (inhibit_formatting) {
p = in_buffer;
do
putc(*p, output);
while (*p++ != '\n');
}
return;
}
/*
* Copyright (C) 1976 by the Board of Trustees of the University of Illinois
*
* All rights reserved
*
*
* NAME: pad_output
*
* FUNCTION: Writes tabs and spaces to move the current column up to the desired
* position.
*
* ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf.
*
* PARAMETERS: current integer The current column target
* target integer The desired column
*
* RETURNS: Integer value of the new column. (If current >= target, no action is
* taken, and current is returned.
*
* GLOBALS: None
*
* CALLS: write (sys)
*
* CALLED BY: dump_line
*
* HISTORY: initial coding November 1976 D A Willcox of CAC
*
*/
int
pad_output(int current, int target)
{
int curr; /* internal column pointer */
int tcur;
if (troff)
fprintf(output, "\\h'|%dp'", (target - 1) * 7);
else {
if (current >= target)
return (current); /* line is already long enough */
curr = current;
if (use_tabs) {
while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) {
putc('\t', output);
curr = tcur;
}
}
while (curr++ < target)
putc(' ', output); /* pad with final blanks */
}
return (target);
}
/*
* Copyright (C) 1976 by the Board of Trustees of the University of Illinois
*
* All rights reserved
*
*
* NAME: count_spaces
*
* FUNCTION: Find out where printing of a given string will leave the current
* character position on output.
*
* ALGORITHM: Run thru input string and add appropriate values to current
* position.
*
* RETURNS: Integer value of position after printing "buffer" starting in column
* "current".
*
* HISTORY: initial coding November 1976 D A Willcox of CAC
*
*/
int
count_spaces(int current, char *buffer)
{
char *buf; /* used to look thru buffer */
int cur; /* current character counter */
cur = current;
for (buf = buffer; *buf != '\0'; ++buf) {
switch (*buf) {
case '\n':
case 014: /* form feed */
cur = 1;
break;
case '\t':
cur = ((cur - 1) & tabmask) + tabsize + 1;
break;
case 010: /* backspace */
--cur;
break;
default:
++cur;
break;
} /* end of switch */
} /* end of for loop */
return (cur);
}
int found_err;
void
diag(int level, const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
if (level)
found_err = 1;
if (output == stdout) {
fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
vfprintf(stdout, msg, ap);
fprintf(stdout, " */\n");
}
else {
fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no);
vfprintf(stderr, msg, ap);
fprintf(stderr, "\n");
}
va_end(ap);
}
void
writefdef(struct fstate *f, int nm)
{
fprintf(output, ".ds f%c %s\n.nr s%c %d\n",
nm, f->font, nm, f->size);
}
char *
chfont(struct fstate *of, struct fstate *nf, char *s)
{
if (of->font[0] != nf->font[0]
|| of->font[1] != nf->font[1]) {
*s++ = '\\';
*s++ = 'f';
if (nf->font[1]) {
*s++ = '(';
*s++ = nf->font[0];
*s++ = nf->font[1];
}
else
*s++ = nf->font[0];
}
if (nf->size != of->size) {
*s++ = '\\';
*s++ = 's';
if (nf->size < of->size) {
*s++ = '-';
*s++ = '0' + of->size - nf->size;
}
else {
*s++ = '+';
*s++ = '0' + nf->size - of->size;
}
}
return s;
}
void
parsefont(struct fstate *f, char *s0)
{
char *s = s0;
int sizedelta = 0;
bzero(f, sizeof *f);
while (*s) {
if (isdigit((unsigned char)*s))
f->size = f->size * 10 + *s - '0';
else if (isupper((unsigned char)*s))
if (f->font[0])
f->font[1] = *s;
else
f->font[0] = *s;
else if (*s == 'c')
f->allcaps = 1;
else if (*s == '+')
sizedelta++;
else if (*s == '-')
sizedelta--;
else
errx(1, "bad font specification: %s", s0);
s++;
}
if (f->font[0] == 0)
f->font[0] = 'R';
if (bodyf.size == 0)
bodyf.size = 11;
if (f->size == 0)
f->size = bodyf.size + sizedelta;
else if (sizedelta > 0)
f->size += bodyf.size;
else
f->size = bodyf.size - f->size;
}
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