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freebsd-dev/usr.bin/indent/indent.c
Peter Hawkins 18251d7146 PR: 7583 
Submitted by:	Dave Glowacki <dglo@SSEC.WISC.EDU>
Support input via stdin if no input file name specified explicitly
1998-10-18 04:46:24 +00:00

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/*
* Copyright (c) 1985 Sun Microsystems, Inc.
* Copyright (c) 1976 Board of Trustees of the University of Illinois.
* Copyright (c) 1980, 1993
* The Regents of the University of California. 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 const char copyright[] =
"@(#) Copyright (c) 1985 Sun Microsystems, Inc.\n\
@(#) Copyright (c) 1976 Board of Trustees of the University of Illinois.\n\
@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)indent.c 5.17 (Berkeley) 6/7/93";
#endif
static const char rcsid[] =
"$Id: indent.c,v 1.2 1997/07/15 09:50:59 charnier Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "indent_globs.h"
#include "indent_codes.h"
#include <ctype.h>
char *in_name = "Standard Input"; /* will always point to name of input
* file */
char *out_name = "Standard Output"; /* will always point to name
* of output file */
char bakfile[MAXPATHLEN] = "";
static void usage __P((void));
main(argc, argv)
int argc;
char **argv;
{
extern int found_err; /* flag set in diag() on error */
int dec_ind; /* current indentation for declarations */
int di_stack[20]; /* a stack of structure indentation levels */
int flushed_nl; /* used when buffering up comments to remember
* that a newline was passed over */
int force_nl; /* when true, code must be broken */
int hd_type; /* used to store type of stmt for if (...),
* for (...), etc */
register int i; /* local loop counter */
int scase; /* set to true when we see a case, so we will
* know what to do with the following colon */
int sp_sw; /* when true, we are in the expressin of
* if(...), while(...), etc. */
int squest; /* when this is positive, we have seen a ?
* without the matching : in a <c>?<s>:<s>
* construct */
register char *t_ptr; /* used for copying tokens */
int type_code; /* the type of token, returned by lexi */
int last_else = 0; /* true iff last keyword was an else */
/*-----------------------------------------------*\
| INITIALIZATION |
\*-----------------------------------------------*/
ps.p_stack[0] = stmt; /* this is the parser's stack */
ps.last_nl = true; /* this is true if the last thing scanned was
* a newline */
ps.last_token = semicolon;
combuf = (char *) malloc(bufsize);
labbuf = (char *) malloc(bufsize);
codebuf = (char *) malloc(bufsize);
tokenbuf = (char *) malloc(bufsize);
l_com = combuf + bufsize - 5;
l_lab = labbuf + bufsize - 5;
l_code = codebuf + bufsize - 5;
l_token = tokenbuf + bufsize - 5;
combuf[0] = codebuf[0] = labbuf[0] = ' '; /* set up code, label, and
* comment buffers */
combuf[1] = codebuf[1] = labbuf[1] = '\0';
ps.else_if = 1; /* Default else-if special processing to on */
s_lab = e_lab = labbuf + 1;
s_code = e_code = codebuf + 1;
s_com = e_com = combuf + 1;
s_token = e_token = tokenbuf + 1;
in_buffer = (char *) malloc(10);
in_buffer_limit = in_buffer + 8;
buf_ptr = buf_end = in_buffer;
line_no = 1;
had_eof = ps.in_decl = ps.decl_on_line = break_comma = false;
sp_sw = force_nl = false;
ps.in_or_st = false;
ps.bl_line = true;
dec_ind = 0;
di_stack[ps.dec_nest = 0] = 0;
ps.want_blank = ps.in_stmt = ps.ind_stmt = false;
scase = ps.pcase = false;
squest = 0;
sc_end = 0;
bp_save = 0;
be_save = 0;
output = 0;
/*--------------------------------------------------*\
| COMMAND LINE SCAN |
\*--------------------------------------------------*/
#ifdef undef
max_col = 78; /* -l78 */
lineup_to_parens = 1; /* -lp */
ps.ljust_decl = 0; /* -ndj */
ps.com_ind = 33; /* -c33 */
star_comment_cont = 1; /* -sc */
ps.ind_size = 8; /* -i8 */
verbose = 0;
ps.decl_indent = 16; /* -di16 */
ps.indent_parameters = 1; /* -ip */
ps.decl_com_ind = 0; /* if this is not set to some positive value
* by an arg, we will set this equal to
* ps.com_ind */
btype_2 = 1; /* -br */
cuddle_else = 1; /* -ce */
ps.unindent_displace = 0; /* -d0 */
ps.case_indent = 0; /* -cli0 */
format_col1_comments = 1; /* -fc1 */
procnames_start_line = 1; /* -psl */
proc_calls_space = 0; /* -npcs */
comment_delimiter_on_blankline = 1; /* -cdb */
ps.leave_comma = 1; /* -nbc */
#endif
for (i = 1; i < argc; ++i)
if (strcmp(argv[i], "-npro") == 0)
break;
set_defaults();
if (i >= argc)
set_profile();
for (i = 1; i < argc; ++i) {
/*
* look thru args (if any) for changes to defaults
*/
if (argv[i][0] != '-') {/* no flag on parameter */
if (input == 0) { /* we must have the input file */
in_name = argv[i]; /* remember name of input file */
input = fopen(in_name, "r");
if (input == 0) /* check for open error */
err(1, in_name);
continue;
}
else if (output == 0) { /* we have the output file */
out_name = argv[i]; /* remember name of output file */
if (strcmp(in_name, out_name) == 0) { /* attempt to overwrite
* the file */
errx(1, "input and output files must be different");
}
output = fopen(out_name, "w");
if (output == 0) /* check for create error */
err(1, out_name);
continue;
}
errx(1, "unknown parameter: %s", argv[i]);
}
else
set_option(argv[i]);
} /* end of for */
if (input == 0) {
input = stdin;
}
if (output == 0)
if (troff || input == stdin)
output = stdout;
else {
out_name = in_name;
bakcopy();
}
if (ps.com_ind <= 1)
ps.com_ind = 2; /* dont put normal comments before column 2 */
if (troff) {
if (bodyf.font[0] == 0)
parsefont(&bodyf, "R");
if (scomf.font[0] == 0)
parsefont(&scomf, "I");
if (blkcomf.font[0] == 0)
blkcomf = scomf, blkcomf.size += 2;
if (boxcomf.font[0] == 0)
boxcomf = blkcomf;
if (stringf.font[0] == 0)
parsefont(&stringf, "L");
if (keywordf.font[0] == 0)
parsefont(&keywordf, "B");
writefdef(&bodyf, 'B');
writefdef(&scomf, 'C');
writefdef(&blkcomf, 'L');
writefdef(&boxcomf, 'X');
writefdef(&stringf, 'S');
writefdef(&keywordf, 'K');
}
if (block_comment_max_col <= 0)
block_comment_max_col = max_col;
if (ps.decl_com_ind <= 0) /* if not specified by user, set this */
ps.decl_com_ind = ps.ljust_decl ? (ps.com_ind <= 10 ? 2 : ps.com_ind - 8) : ps.com_ind;
if (continuation_indent == 0)
continuation_indent = ps.ind_size;
fill_buffer(); /* get first batch of stuff into input buffer */
parse(semicolon);
{
register char *p = buf_ptr;
register col = 1;
while (1) {
if (*p == ' ')
col++;
else if (*p == '\t')
col = ((col - 1) & ~7) + 9;
else
break;
p++;
}
if (col > ps.ind_size)
ps.ind_level = ps.i_l_follow = col / ps.ind_size;
}
if (troff) {
register char *p = in_name,
*beg = in_name;
while (*p)
if (*p++ == '/')
beg = p;
fprintf(output, ".Fn \"%s\"\n", beg);
}
/*
* START OF MAIN LOOP
*/
while (1) { /* this is the main loop. it will go until we
* reach eof */
int is_procname;
type_code = lexi(); /* lexi reads one token. The actual
* characters read are stored in "token". lexi
* returns a code indicating the type of token */
is_procname = ps.procname[0];
/*
* The following code moves everything following an if (), while (),
* else, etc. up to the start of the following stmt to a buffer. This
* allows proper handling of both kinds of brace placement.
*/
flushed_nl = false;
while (ps.search_brace) { /* if we scanned an if(), while(),
* etc., we might need to copy stuff
* into a buffer we must loop, copying
* stuff into save_com, until we find
* the start of the stmt which follows
* the if, or whatever */
switch (type_code) {
case newline:
++line_no;
flushed_nl = true;
case form_feed:
break; /* form feeds and newlines found here will be
* ignored */
case lbrace: /* this is a brace that starts the compound
* stmt */
if (sc_end == 0) { /* ignore buffering if a comment wasnt
* stored up */
ps.search_brace = false;
goto check_type;
}
if (btype_2) {
save_com[0] = '{'; /* we either want to put the brace
* right after the if */
goto sw_buffer; /* go to common code to get out of
* this loop */
}
case comment: /* we have a comment, so we must copy it into
* the buffer */
if (!flushed_nl || sc_end != 0) {
if (sc_end == 0) { /* if this is the first comment, we
* must set up the buffer */
save_com[0] = save_com[1] = ' ';
sc_end = &(save_com[2]);
}
else {
*sc_end++ = '\n'; /* add newline between
* comments */
*sc_end++ = ' ';
--line_no;
}
*sc_end++ = '/'; /* copy in start of comment */
*sc_end++ = '*';
for (;;) { /* loop until we get to the end of the comment */
*sc_end = *buf_ptr++;
if (buf_ptr >= buf_end)
fill_buffer();
if (*sc_end++ == '*' && *buf_ptr == '/')
break; /* we are at end of comment */
if (sc_end >= &(save_com[sc_size])) { /* check for temp buffer
* overflow */
diag(1, "Internal buffer overflow - Move big comment from right after if, while, or whatever.");
fflush(output);
exit(1);
}
}
*sc_end++ = '/'; /* add ending slash */
if (++buf_ptr >= buf_end) /* get past / in buffer */
fill_buffer();
break;
}
default: /* it is the start of a normal statment */
if (flushed_nl) /* if we flushed a newline, make sure it is
* put back */
force_nl = true;
if (type_code == sp_paren && *token == 'i'
&& last_else && ps.else_if
|| type_code == sp_nparen && *token == 'e'
&& e_code != s_code && e_code[-1] == '}')
force_nl = false;
if (sc_end == 0) { /* ignore buffering if comment wasnt
* saved up */
ps.search_brace = false;
goto check_type;
}
if (force_nl) { /* if we should insert a nl here, put it into
* the buffer */
force_nl = false;
--line_no; /* this will be re-increased when the nl is
* read from the buffer */
*sc_end++ = '\n';
*sc_end++ = ' ';
if (verbose && !flushed_nl) /* print error msg if the line
* was not already broken */
diag(0, "Line broken");
flushed_nl = false;
}
for (t_ptr = token; *t_ptr; ++t_ptr)
*sc_end++ = *t_ptr; /* copy token into temp buffer */
ps.procname[0] = 0;
sw_buffer:
ps.search_brace = false; /* stop looking for start of
* stmt */
bp_save = buf_ptr; /* save current input buffer */
be_save = buf_end;
buf_ptr = save_com; /* fix so that subsequent calls to
* lexi will take tokens out of
* save_com */
*sc_end++ = ' ';/* add trailing blank, just in case */
buf_end = sc_end;
sc_end = 0;
break;
} /* end of switch */
if (type_code != 0) /* we must make this check, just in case there
* was an unexpected EOF */
type_code = lexi(); /* read another token */
/* if (ps.search_brace) ps.procname[0] = 0; */
if ((is_procname = ps.procname[0]) && flushed_nl
&& !procnames_start_line && ps.in_decl
&& type_code == ident)
flushed_nl = 0;
} /* end of while (search_brace) */
last_else = 0;
check_type:
if (type_code == 0) { /* we got eof */
if (s_lab != e_lab || s_code != e_code
|| s_com != e_com) /* must dump end of line */
dump_line();
if (ps.tos > 1) /* check for balanced braces */
diag(1, "Stuff missing from end of file.");
if (verbose) {
printf("There were %d output lines and %d comments\n",
ps.out_lines, ps.out_coms);
printf("(Lines with comments)/(Lines with code): %6.3f\n",
(1.0 * ps.com_lines) / code_lines);
}
fflush(output);
exit(found_err);
}
if (
(type_code != comment) &&
(type_code != newline) &&
(type_code != preesc) &&
(type_code != form_feed)) {
if (force_nl &&
(type_code != semicolon) &&
(type_code != lbrace || !btype_2)) {
/* we should force a broken line here */
if (verbose && !flushed_nl)
diag(0, "Line broken");
flushed_nl = false;
dump_line();
ps.want_blank = false; /* dont insert blank at line start */
force_nl = false;
}
ps.in_stmt = true; /* turn on flag which causes an extra level of
* indentation. this is turned off by a ; or
* '}' */
if (s_com != e_com) { /* the turkey has embedded a comment
* in a line. fix it */
*e_code++ = ' ';
for (t_ptr = s_com; *t_ptr; ++t_ptr) {
CHECK_SIZE_CODE;
*e_code++ = *t_ptr;
}
*e_code++ = ' ';
*e_code = '\0'; /* null terminate code sect */
ps.want_blank = false;
e_com = s_com;
}
}
else if (type_code != comment) /* preserve force_nl thru a comment */
force_nl = false; /* cancel forced newline after newline, form
* feed, etc */
/*-----------------------------------------------------*\
| do switch on type of token scanned |
\*-----------------------------------------------------*/
CHECK_SIZE_CODE;
switch (type_code) { /* now, decide what to do with the token */
case form_feed: /* found a form feed in line */
ps.use_ff = true; /* a form feed is treated much like a newline */
dump_line();
ps.want_blank = false;
break;
case newline:
if (ps.last_token != comma || ps.p_l_follow > 0
|| !ps.leave_comma || ps.block_init || !break_comma || s_com != e_com) {
dump_line();
ps.want_blank = false;
}
++line_no; /* keep track of input line number */
break;
case lparen: /* got a '(' or '[' */
++ps.p_l_follow; /* count parens to make Healy happy */
if (ps.want_blank && *token != '[' &&
(ps.last_token != ident || proc_calls_space
|| (ps.its_a_keyword && (!ps.sizeof_keyword || Bill_Shannon))))
*e_code++ = ' ';
if (ps.in_decl && !ps.block_init)
if (troff && !ps.dumped_decl_indent && !is_procname && ps.last_token == decl) {
ps.dumped_decl_indent = 1;
sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token);
e_code += strlen(e_code);
}
else {
while ((e_code - s_code) < dec_ind) {
CHECK_SIZE_CODE;
*e_code++ = ' ';
}
*e_code++ = token[0];
}
else
*e_code++ = token[0];
ps.paren_indents[ps.p_l_follow - 1] = e_code - s_code;
if (sp_sw && ps.p_l_follow == 1 && extra_expression_indent
&& ps.paren_indents[0] < 2 * ps.ind_size)
ps.paren_indents[0] = 2 * ps.ind_size;
ps.want_blank = false;
if (ps.in_or_st && *token == '(' && ps.tos <= 2) {
/*
* this is a kluge to make sure that declarations will be
* aligned right if proc decl has an explicit type on it, i.e.
* "int a(x) {..."
*/
parse(semicolon); /* I said this was a kluge... */
ps.in_or_st = false; /* turn off flag for structure decl or
* initialization */
}
if (ps.sizeof_keyword)
ps.sizeof_mask |= 1 << ps.p_l_follow;
break;
case rparen: /* got a ')' or ']' */
rparen_count--;
if (ps.cast_mask & (1 << ps.p_l_follow) & ~ps.sizeof_mask) {
ps.last_u_d = true;
ps.cast_mask &= (1 << ps.p_l_follow) - 1;
}
ps.sizeof_mask &= (1 << ps.p_l_follow) - 1;
if (--ps.p_l_follow < 0) {
ps.p_l_follow = 0;
diag(0, "Extra %c", *token);
}
if (e_code == s_code) /* if the paren starts the line */
ps.paren_level = ps.p_l_follow; /* then indent it */
*e_code++ = token[0];
ps.want_blank = true;
if (sp_sw && (ps.p_l_follow == 0)) { /* check for end of if
* (...), or some such */
sp_sw = false;
force_nl = true;/* must force newline after if */
ps.last_u_d = true; /* inform lexi that a following
* operator is unary */
ps.in_stmt = false; /* dont use stmt continuation
* indentation */
parse(hd_type); /* let parser worry about if, or whatever */
}
ps.search_brace = btype_2; /* this should insure that constructs
* such as main(){...} and int[]{...}
* have their braces put in the right
* place */
break;
case unary_op: /* this could be any unary operation */
if (ps.want_blank)
*e_code++ = ' ';
if (troff && !ps.dumped_decl_indent && ps.in_decl && !is_procname) {
sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token);
ps.dumped_decl_indent = 1;
e_code += strlen(e_code);
}
else {
char *res = token;
if (ps.in_decl && !ps.block_init) { /* if this is a unary op
* in a declaration, we
* should indent this
* token */
for (i = 0; token[i]; ++i); /* find length of token */
while ((e_code - s_code) < (dec_ind - i)) {
CHECK_SIZE_CODE;
*e_code++ = ' '; /* pad it */
}
}
if (troff && token[0] == '-' && token[1] == '>')
res = "\\(->";
for (t_ptr = res; *t_ptr; ++t_ptr) {
CHECK_SIZE_CODE;
*e_code++ = *t_ptr;
}
}
ps.want_blank = false;
break;
case binary_op: /* any binary operation */
if (ps.want_blank)
*e_code++ = ' ';
{
char *res = token;
if (troff)
switch (token[0]) {
case '<':
if (token[1] == '=')
res = "\\(<=";
break;
case '>':
if (token[1] == '=')
res = "\\(>=";
break;
case '!':
if (token[1] == '=')
res = "\\(!=";
break;
case '|':
if (token[1] == '|')
res = "\\(br\\(br";
else if (token[1] == 0)
res = "\\(br";
break;
}
for (t_ptr = res; *t_ptr; ++t_ptr) {
CHECK_SIZE_CODE;
*e_code++ = *t_ptr; /* move the operator */
}
}
ps.want_blank = true;
break;
case postop: /* got a trailing ++ or -- */
*e_code++ = token[0];
*e_code++ = token[1];
ps.want_blank = true;
break;
case question: /* got a ? */
squest++; /* this will be used when a later colon
* appears so we can distinguish the
* <c>?<n>:<n> construct */
if (ps.want_blank)
*e_code++ = ' ';
*e_code++ = '?';
ps.want_blank = true;
break;
case casestmt: /* got word 'case' or 'default' */
scase = true; /* so we can process the later colon properly */
goto copy_id;
case colon: /* got a ':' */
if (squest > 0) { /* it is part of the <c>?<n>: <n> construct */
--squest;
if (ps.want_blank)
*e_code++ = ' ';
*e_code++ = ':';
ps.want_blank = true;
break;
}
if (ps.in_decl) {
*e_code++ = ':';
ps.want_blank = false;
break;
}
ps.in_stmt = false; /* seeing a label does not imply we are in a
* stmt */
for (t_ptr = s_code; *t_ptr; ++t_ptr)
*e_lab++ = *t_ptr; /* turn everything so far into a label */
e_code = s_code;
*e_lab++ = ':';
*e_lab++ = ' ';
*e_lab = '\0';
force_nl = ps.pcase = scase; /* ps.pcase will be used by
* dump_line to decide how to
* indent the label. force_nl
* will force a case n: to be
* on a line by itself */
scase = false;
ps.want_blank = false;
break;
case semicolon: /* got a ';' */
ps.in_or_st = false;/* we are not in an initialization or
* structure declaration */
scase = false; /* these will only need resetting in a error */
squest = 0;
if (ps.last_token == rparen && rparen_count == 0)
ps.in_parameter_declaration = 0;
ps.cast_mask = 0;
ps.sizeof_mask = 0;
ps.block_init = 0;
ps.block_init_level = 0;
ps.just_saw_decl--;
if (ps.in_decl && s_code == e_code && !ps.block_init)
while ((e_code - s_code) < (dec_ind - 1)) {
CHECK_SIZE_CODE;
*e_code++ = ' ';
}
ps.in_decl = (ps.dec_nest > 0); /* if we were in a first level
* structure declaration, we
* arent any more */
if ((!sp_sw || hd_type != forstmt) && ps.p_l_follow > 0) {
/*
* This should be true iff there were unbalanced parens in the
* stmt. It is a bit complicated, because the semicolon might
* be in a for stmt
*/
diag(1, "Unbalanced parens");
ps.p_l_follow = 0;
if (sp_sw) { /* this is a check for a if, while, etc. with
* unbalanced parens */
sp_sw = false;
parse(hd_type); /* dont lose the if, or whatever */
}
}
*e_code++ = ';';
ps.want_blank = true;
ps.in_stmt = (ps.p_l_follow > 0); /* we are no longer in the
* middle of a stmt */
if (!sp_sw) { /* if not if for (;;) */
parse(semicolon); /* let parser know about end of stmt */
force_nl = true;/* force newline after a end of stmt */
}
break;
case lbrace: /* got a '{' */
ps.in_stmt = false; /* dont indent the {} */
if (!ps.block_init)
force_nl = true;/* force other stuff on same line as '{' onto
* new line */
else if (ps.block_init_level <= 0)
ps.block_init_level = 1;
else
ps.block_init_level++;
if (s_code != e_code && !ps.block_init) {
if (!btype_2) {
dump_line();
ps.want_blank = false;
}
else if (ps.in_parameter_declaration && !ps.in_or_st) {
ps.i_l_follow = 0;
dump_line();
ps.want_blank = false;
}
}
if (ps.in_parameter_declaration)
prefix_blankline_requested = 0;
if (ps.p_l_follow > 0) { /* check for preceeding unbalanced
* parens */
diag(1, "Unbalanced parens");
ps.p_l_follow = 0;
if (sp_sw) { /* check for unclosed if, for, etc. */
sp_sw = false;
parse(hd_type);
ps.ind_level = ps.i_l_follow;
}
}
if (s_code == e_code)
ps.ind_stmt = false; /* dont put extra indentation on line
* with '{' */
if (ps.in_decl && ps.in_or_st) { /* this is either a structure
* declaration or an init */
di_stack[ps.dec_nest++] = dec_ind;
/* ? dec_ind = 0; */
}
else {
ps.decl_on_line = false; /* we cant be in the middle of
* a declaration, so dont do
* special indentation of
* comments */
if (blanklines_after_declarations_at_proctop
&& ps.in_parameter_declaration)
postfix_blankline_requested = 1;
ps.in_parameter_declaration = 0;
}
dec_ind = 0;
parse(lbrace); /* let parser know about this */
if (ps.want_blank) /* put a blank before '{' if '{' is not at
* start of line */
*e_code++ = ' ';
ps.want_blank = false;
*e_code++ = '{';
ps.just_saw_decl = 0;
break;
case rbrace: /* got a '}' */
if (ps.p_stack[ps.tos] == decl && !ps.block_init) /* semicolons can be
* omitted in
* declarations */
parse(semicolon);
if (ps.p_l_follow) {/* check for unclosed if, for, else. */
diag(1, "Unbalanced parens");
ps.p_l_follow = 0;
sp_sw = false;
}
ps.just_saw_decl = 0;
ps.block_init_level--;
if (s_code != e_code && !ps.block_init) { /* '}' must be first on
* line */
if (verbose)
diag(0, "Line broken");
dump_line();
}
*e_code++ = '}';
ps.want_blank = true;
ps.in_stmt = ps.ind_stmt = false;
if (ps.dec_nest > 0) { /* we are in multi-level structure
* declaration */
dec_ind = di_stack[--ps.dec_nest];
if (ps.dec_nest == 0 && !ps.in_parameter_declaration)
ps.just_saw_decl = 2;
ps.in_decl = true;
}
prefix_blankline_requested = 0;
parse(rbrace); /* let parser know about this */
ps.search_brace = cuddle_else && ps.p_stack[ps.tos] == ifhead
&& ps.il[ps.tos] >= ps.ind_level;
if (ps.tos <= 1 && blanklines_after_procs && ps.dec_nest <= 0)
postfix_blankline_requested = 1;
break;
case swstmt: /* got keyword "switch" */
sp_sw = true;
hd_type = swstmt; /* keep this for when we have seen the
* expression */
goto copy_id; /* go move the token into buffer */
case sp_paren: /* token is if, while, for */
sp_sw = true; /* the interesting stuff is done after the
* expression is scanned */
hd_type = (*token == 'i' ? ifstmt :
(*token == 'w' ? whilestmt : forstmt));
/*
* remember the type of header for later use by parser
*/
goto copy_id; /* copy the token into line */
case sp_nparen: /* got else, do */
ps.in_stmt = false;
if (*token == 'e') {
if (e_code != s_code && (!cuddle_else || e_code[-1] != '}')) {
if (verbose)
diag(0, "Line broken");
dump_line();/* make sure this starts a line */
ps.want_blank = false;
}
force_nl = true;/* also, following stuff must go onto new line */
last_else = 1;
parse(elselit);
}
else {
if (e_code != s_code) { /* make sure this starts a line */
if (verbose)
diag(0, "Line broken");
dump_line();
ps.want_blank = false;
}
force_nl = true;/* also, following stuff must go onto new line */
last_else = 0;
parse(dolit);
}
goto copy_id; /* move the token into line */
case decl: /* we have a declaration type (int, register,
* etc.) */
parse(decl); /* let parser worry about indentation */
if (ps.last_token == rparen && ps.tos <= 1) {
ps.in_parameter_declaration = 1;
if (s_code != e_code) {
dump_line();
ps.want_blank = 0;
}
}
if (ps.in_parameter_declaration && ps.indent_parameters && ps.dec_nest == 0) {
ps.ind_level = ps.i_l_follow = 1;
ps.ind_stmt = 0;
}
ps.in_or_st = true; /* this might be a structure or initialization
* declaration */
ps.in_decl = ps.decl_on_line = true;
if ( /* !ps.in_or_st && */ ps.dec_nest <= 0)
ps.just_saw_decl = 2;
prefix_blankline_requested = 0;
for (i = 0; token[i++];); /* get length of token */
/*
* dec_ind = e_code - s_code + (ps.decl_indent>i ? ps.decl_indent
* : i);
*/
dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i;
goto copy_id;
case ident: /* got an identifier or constant */
if (ps.in_decl) { /* if we are in a declaration, we must indent
* identifier */
if (ps.want_blank)
*e_code++ = ' ';
ps.want_blank = false;
if (is_procname == 0 || !procnames_start_line) {
if (!ps.block_init)
if (troff && !ps.dumped_decl_indent) {
sprintf(e_code, "\n.De %dp+\200p\n", dec_ind * 7);
ps.dumped_decl_indent = 1;
e_code += strlen(e_code);
}
else
while ((e_code - s_code) < dec_ind) {
CHECK_SIZE_CODE;
*e_code++ = ' ';
}
}
else {
if (dec_ind && s_code != e_code)
dump_line();
dec_ind = 0;
ps.want_blank = false;
}
}
else if (sp_sw && ps.p_l_follow == 0) {
sp_sw = false;
force_nl = true;
ps.last_u_d = true;
ps.in_stmt = false;
parse(hd_type);
}
copy_id:
if (ps.want_blank)
*e_code++ = ' ';
if (troff && ps.its_a_keyword) {
e_code = chfont(&bodyf, &keywordf, e_code);
for (t_ptr = token; *t_ptr; ++t_ptr) {
CHECK_SIZE_CODE;
*e_code++ = keywordf.allcaps && islower(*t_ptr)
? toupper(*t_ptr) : *t_ptr;
}
e_code = chfont(&keywordf, &bodyf, e_code);
}
else
for (t_ptr = token; *t_ptr; ++t_ptr) {
CHECK_SIZE_CODE;
*e_code++ = *t_ptr;
}
ps.want_blank = true;
break;
case period: /* treat a period kind of like a binary
* operation */
*e_code++ = '.'; /* move the period into line */
ps.want_blank = false; /* dont put a blank after a period */
break;
case comma:
ps.want_blank = (s_code != e_code); /* only put blank after comma
* if comma does not start the
* line */
if (ps.in_decl && is_procname == 0 && !ps.block_init)
while ((e_code - s_code) < (dec_ind - 1)) {
CHECK_SIZE_CODE;
*e_code++ = ' ';
}
*e_code++ = ',';
if (ps.p_l_follow == 0) {
if (ps.block_init_level <= 0)
ps.block_init = 0;
if (break_comma && (!ps.leave_comma || compute_code_target() + (e_code - s_code) > max_col - 8))
force_nl = true;
}
break;
case preesc: /* got the character '#' */
if ((s_com != e_com) ||
(s_lab != e_lab) ||
(s_code != e_code))
dump_line();
*e_lab++ = '#'; /* move whole line to 'label' buffer */
{
int in_comment = 0;
int com_start = 0;
char quote = 0;
int com_end = 0;
while (*buf_ptr == ' ' || *buf_ptr == '\t') {
buf_ptr++;
if (buf_ptr >= buf_end)
fill_buffer();
}
while (*buf_ptr != '\n' || in_comment) {
CHECK_SIZE_LAB;
*e_lab = *buf_ptr++;
if (buf_ptr >= buf_end)
fill_buffer();
switch (*e_lab++) {
case BACKSLASH:
if (troff)
*e_lab++ = BACKSLASH;
if (!in_comment) {
*e_lab++ = *buf_ptr++;
if (buf_ptr >= buf_end)
fill_buffer();
}
break;
case '/':
if (*buf_ptr == '*' && !in_comment && !quote) {
in_comment = 1;
*e_lab++ = *buf_ptr++;
com_start = e_lab - s_lab - 2;
}
break;
case '"':
if (quote == '"')
quote = 0;
break;
case '\'':
if (quote == '\'')
quote = 0;
break;
case '*':
if (*buf_ptr == '/' && in_comment) {
in_comment = 0;
*e_lab++ = *buf_ptr++;
com_end = e_lab - s_lab;
}
break;
}
}
while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
e_lab--;
if (e_lab - s_lab == com_end && bp_save == 0) { /* comment on
* preprocessor line */
if (sc_end == 0) /* if this is the first comment, we
* must set up the buffer */
sc_end = &(save_com[0]);
else {
*sc_end++ = '\n'; /* add newline between
* comments */
*sc_end++ = ' ';
--line_no;
}
bcopy(s_lab + com_start, sc_end, com_end - com_start);
sc_end += com_end - com_start;
if (sc_end >= &save_com[sc_size])
abort();
e_lab = s_lab + com_start;
while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
e_lab--;
bp_save = buf_ptr; /* save current input buffer */
be_save = buf_end;
buf_ptr = save_com; /* fix so that subsequent calls to
* lexi will take tokens out of
* save_com */
*sc_end++ = ' '; /* add trailing blank, just in case */
buf_end = sc_end;
sc_end = 0;
}
*e_lab = '\0'; /* null terminate line */
ps.pcase = false;
}
if (strncmp(s_lab, "#if", 3) == 0) {
if (blanklines_around_conditional_compilation) {
register c;
prefix_blankline_requested++;
while ((c = getc(input)) == '\n');
ungetc(c, input);
}
if (ifdef_level < sizeof state_stack / sizeof state_stack[0]) {
match_state[ifdef_level].tos = -1;
state_stack[ifdef_level++] = ps;
}
else
diag(1, "#if stack overflow");
}
else if (strncmp(s_lab, "#else", 5) == 0)
if (ifdef_level <= 0)
diag(1, "Unmatched #else");
else {
match_state[ifdef_level - 1] = ps;
ps = state_stack[ifdef_level - 1];
}
else if (strncmp(s_lab, "#endif", 6) == 0) {
if (ifdef_level <= 0)
diag(1, "Unmatched #endif");
else {
ifdef_level--;
#ifdef undef
/*
* This match needs to be more intelligent before the
* message is useful
*/
if (match_state[ifdef_level].tos >= 0
&& bcmp(&ps, &match_state[ifdef_level], sizeof ps))
diag(0, "Syntactically inconsistant #ifdef alternatives.");
#endif
}
if (blanklines_around_conditional_compilation) {
postfix_blankline_requested++;
n_real_blanklines = 0;
}
}
break; /* subsequent processing of the newline
* character will cause the line to be printed */
case comment: /* we have gotten a /* this is a biggie */
if (flushed_nl) { /* we should force a broken line here */
flushed_nl = false;
dump_line();
ps.want_blank = false; /* dont insert blank at line start */
force_nl = false;
}
pr_comment();
break;
} /* end of big switch stmt */
*e_code = '\0'; /* make sure code section is null terminated */
if (type_code != comment && type_code != newline && type_code != preesc)
ps.last_token = type_code;
} /* end of main while (1) loop */
}
static void
usage()
{
fprintf(stderr, "usage: indent [ file [ outfile ] ] [ options ]\n");
exit(1);
}
/*
* copy input file to backup file if in_name is /blah/blah/blah/file, then
* backup file will be ".Bfile" then make the backup file the input and
* original input file the output
*/
bakcopy()
{
int n,
bakchn;
char buff[8 * 1024];
register char *p;
/* construct file name .Bfile */
for (p = in_name; *p; p++); /* skip to end of string */
while (p > in_name && *p != '/') /* find last '/' */
p--;
if (*p == '/')
p++;
sprintf(bakfile, "%s.BAK", p);
/* copy in_name to backup file */
bakchn = creat(bakfile, 0600);
if (bakchn < 0)
err(1, bakfile);
while (n = read(fileno(input), buff, sizeof buff))
if (write(bakchn, buff, n) != n)
err(1, bakfile);
if (n < 0)
err(1, in_name);
close(bakchn);
fclose(input);
/* re-open backup file as the input file */
input = fopen(bakfile, "r");
if (input == 0)
err(1, bakfile);
/* now the original input file will be the output */
output = fopen(in_name, "w");
if (output == 0) {
unlink(bakfile);
err(1, in_name);
}
}
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