#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
#if 0
#ifndef lint
static char sccsid[] = "@(#)indent.c 5.17 (Berkeley) 6/7/93";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/indent/indent.c,v 1.28 2011/12/30 11:02:40 uqs Exp $");
#include <sys/param.h>
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "indent_globs.h"
#include "indent_codes.h"
#include "indent.h"
static void bakcopy(void);
const char *in_name = "Standard Input";
const char *out_name = "Standard Output";
char bakfile[MAXPATHLEN] = "";
int
main(int argc, char **argv)
{
int dec_ind;
int di_stack[20];
int flushed_nl;
int force_nl;
int hd_type = 0;
int i;
int scase;
int sp_sw;
int squest;
const char *t_ptr;
int tabs_to_var;
int type_code;
int last_else = 0;
found_err = 0;
ps.p_stack[0] = stmt;
ps.last_nl = true;
ps.last_token = semicolon;
combuf = (char *) malloc(bufsize);
if (combuf == NULL)
err(1, NULL);
labbuf = (char *) malloc(bufsize);
if (labbuf == NULL)
err(1, NULL);
codebuf = (char *) malloc(bufsize);
if (codebuf == NULL)
err(1, NULL);
tokenbuf = (char *) malloc(bufsize);
if (tokenbuf == NULL)
err(1, NULL);
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] = ' ';
combuf[1] = codebuf[1] = labbuf[1] = '\0';
ps.else_if = 1;
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);
if (in_buffer == NULL)
err(1, NULL);
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;
tabs_to_var = 0;
#ifdef undef
max_col = 78;
lineup_to_parens = 1;
ps.ljust_decl = 0;
ps.com_ind = 33;
star_comment_cont = 1;
ps.ind_size = 8;
verbose = 0;
ps.decl_indent = 16;
ps.local_decl_indent = -1;
ps.indent_parameters = 1;
ps.decl_com_ind = 0;
btype_2 = 1;
cuddle_else = 1;
ps.unindent_displace = 0;
ps.case_indent = 0;
format_block_comments = 1;
format_col1_comments = 1;
procnames_start_line = 1;
proc_calls_space = 0;
comment_delimiter_on_blankline = 1;
ps.leave_comma = 1;
#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) {
if (argv[i][0] != '-') {
if (input == NULL) {
in_name = argv[i];
input = fopen(in_name, "r");
if (input == NULL)
err(1, "%s", in_name);
continue;
}
else if (output == NULL) {
out_name = argv[i];
if (strcmp(in_name, out_name) == 0) {
errx(1, "input and output files must be different");
}
output = fopen(out_name, "w");
if (output == NULL)
err(1, "%s", out_name);
continue;
}
errx(1, "unknown parameter: %s", argv[i]);
}
else
set_option(argv[i]);
}
if (input == NULL)
input = stdin;
if (output == NULL) {
if (troff || input == stdin)
output = stdout;
else {
out_name = in_name;
bakcopy();
}
}
if (ps.com_ind <= 1)
ps.com_ind = 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.local_decl_indent < 0)
ps.local_decl_indent = ps.decl_indent;
if (ps.decl_com_ind <= 0)
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();
parse(semicolon);
{
char *p = buf_ptr;
int 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) {
const char *p = in_name,
*beg = in_name;
while (*p)
if (*p++ == '/')
beg = p;
fprintf(output, ".Fn \"%s\"\n", beg);
}
while (1) {
int is_procname;
type_code = lexi();
is_procname = ps.procname[0];
flushed_nl = false;
while (ps.search_brace) {
switch (type_code) {
case newline:
++line_no;
flushed_nl = true;
case form_feed:
break;
case lbrace:
if (sc_end == 0) {
ps.search_brace = false;
goto check_type;
}
if (btype_2) {
save_com[0] = '{';
goto sw_buffer;
}
case comment:
if (!flushed_nl || sc_end != 0) {
if (sc_end == 0) {
save_com[0] = save_com[1] = ' ';
sc_end = &(save_com[2]);
}
else {
*sc_end++ = '\n';
*sc_end++ = ' ';
--line_no;
}
*sc_end++ = '/';
*sc_end++ = '*';
for (;;) {
*sc_end = *buf_ptr++;
if (buf_ptr >= buf_end)
fill_buffer();
if (*sc_end++ == '*' && *buf_ptr == '/')
break;
if (sc_end >= &(save_com[sc_size])) {
diag2(1, "Internal buffer overflow - Move big comment from right after if, while, or whatever");
fflush(output);
exit(1);
}
}
*sc_end++ = '/';
if (++buf_ptr >= buf_end)
fill_buffer();
break;
}
default:
if (flushed_nl)
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) {
ps.search_brace = false;
goto check_type;
}
if (force_nl) {
force_nl = false;
--line_no;
*sc_end++ = '\n';
*sc_end++ = ' ';
if (verbose && !flushed_nl)
diag2(0, "Line broken");
flushed_nl = false;
}
for (t_ptr = token; *t_ptr; ++t_ptr)
*sc_end++ = *t_ptr;
ps.procname[0] = 0;
sw_buffer:
ps.search_brace = false;
bp_save = buf_ptr;
be_save = buf_end;
buf_ptr = save_com;
*sc_end++ = ' ';
buf_end = sc_end;
sc_end = 0;
break;
}
if (type_code != 0)
type_code = lexi();
if ((is_procname = ps.procname[0]) && flushed_nl
&& !procnames_start_line && ps.in_decl
&& type_code == ident)
flushed_nl = 0;
}
last_else = 0;
check_type:
if (type_code == 0) {
if (s_lab != e_lab || s_code != e_code
|| s_com != e_com)
dump_line();
if (ps.tos > 1)
diag2(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)) {
if (verbose && !flushed_nl)
diag2(0, "Line broken");
flushed_nl = false;
dump_line();
ps.want_blank = false;
force_nl = false;
}
ps.in_stmt = true;
if (s_com != e_com) {
*e_code++ = ' ';
for (t_ptr = s_com; *t_ptr; ++t_ptr) {
CHECK_SIZE_CODE;
*e_code++ = *t_ptr;
}
*e_code++ = ' ';
*e_code = '\0';
ps.want_blank = false;
e_com = s_com;
}
}
else if (type_code != comment)
force_nl = false;
CHECK_SIZE_CODE;
switch (type_code) {
case form_feed:
ps.use_ff = true;
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;
break;
case lparen:
++ps.p_l_follow;
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) {
parse(semicolon);
ps.in_or_st = false;
}
if (ps.sizeof_keyword)
ps.sizeof_mask |= 1 << ps.p_l_follow;
break;
case rparen:
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.want_blank = false;
} else
ps.want_blank = true;
ps.sizeof_mask &= (1 << ps.p_l_follow) - 1;
if (--ps.p_l_follow < 0) {
ps.p_l_follow = 0;
diag3(0, "Extra %c", *token);
}
if (e_code == s_code)
ps.paren_level = ps.p_l_follow;
*e_code++ = token[0];
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);
}
ps.search_brace = btype_2;
break;
case unary_op:
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 {
const char *res = token;
if (ps.in_decl && !ps.block_init) {
for (i = 0; token[i]; ++i);
while ((e_code - s_code) < (dec_ind - i)) {
CHECK_SIZE_CODE;
*e_code++ = ' ';
}
}
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:
if (ps.want_blank)
*e_code++ = ' ';
{
const 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;
}
}
ps.want_blank = true;
break;
case postop:
*e_code++ = token[0];
*e_code++ = token[1];
ps.want_blank = true;
break;
case question:
squest++;
if (ps.want_blank)
*e_code++ = ' ';
*e_code++ = '?';
ps.want_blank = true;
break;
case casestmt:
scase = true;
goto copy_id;
case colon:
if (squest > 0) {
--squest;
if (ps.want_blank)
*e_code++ = ' ';
*e_code++ = ':';
ps.want_blank = true;
break;
}
if (ps.in_or_st) {
*e_code++ = ':';
ps.want_blank = false;
break;
}
ps.in_stmt = false;
for (t_ptr = s_code; *t_ptr; ++t_ptr)
*e_lab++ = *t_ptr;
e_code = s_code;
*e_lab++ = ':';
*e_lab++ = ' ';
*e_lab = '\0';
force_nl = ps.pcase = scase;
scase = false;
ps.want_blank = false;
break;
case semicolon:
ps.in_or_st = false;
scase = false;
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 ((!sp_sw || hd_type != forstmt) && ps.p_l_follow > 0) {
diag2(1, "Unbalanced parens");
ps.p_l_follow = 0;
if (sp_sw) {
sp_sw = false;
parse(hd_type);
}
}
*e_code++ = ';';
ps.want_blank = true;
ps.in_stmt = (ps.p_l_follow > 0);
if (!sp_sw) {
parse(semicolon);
force_nl = true;
}
break;
case lbrace:
ps.in_stmt = false;
if (!ps.block_init)
force_nl = true;
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;
if (function_brace_split) {
dump_line();
ps.want_blank = false;
} else
ps.want_blank = true;
}
}
if (ps.in_parameter_declaration)
prefix_blankline_requested = 0;
if (ps.p_l_follow > 0) {
diag2(1, "Unbalanced parens");
ps.p_l_follow = 0;
if (sp_sw) {
sp_sw = false;
parse(hd_type);
ps.ind_level = ps.i_l_follow;
}
}
if (s_code == e_code)
ps.ind_stmt = false;
if (ps.in_decl && ps.in_or_st) {
di_stack[ps.dec_nest++] = dec_ind;
}
else {
ps.decl_on_line = false;
if (blanklines_after_declarations_at_proctop
&& ps.in_parameter_declaration)
postfix_blankline_requested = 1;
ps.in_parameter_declaration = 0;
}
dec_ind = 0;
parse(lbrace);
if (ps.want_blank)
*e_code++ = ' ';
ps.want_blank = false;
*e_code++ = '{';
ps.just_saw_decl = 0;
break;
case rbrace:
if (ps.p_stack[ps.tos] == decl && !ps.block_init)
parse(semicolon);
if (ps.p_l_follow) {
diag2(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) {
if (verbose)
diag2(0, "Line broken");
dump_line();
}
*e_code++ = '}';
ps.want_blank = true;
ps.in_stmt = ps.ind_stmt = false;
if (ps.dec_nest > 0) {
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);
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:
sp_sw = true;
hd_type = swstmt;
goto copy_id;
case sp_paren:
sp_sw = true;
hd_type = (*token == 'i' ? ifstmt :
(*token == 'w' ? whilestmt : forstmt));
goto copy_id;
case sp_nparen:
ps.in_stmt = false;
if (*token == 'e') {
if (e_code != s_code && (!cuddle_else || e_code[-1] != '}')) {
if (verbose)
diag2(0, "Line broken");
dump_line();
ps.want_blank = false;
}
force_nl = true;
last_else = 1;
parse(elselit);
}
else {
if (e_code != s_code) {
if (verbose)
diag2(0, "Line broken");
dump_line();
ps.want_blank = false;
}
force_nl = true;
last_else = 0;
parse(dolit);
}
goto copy_id;
case decl:
parse(decl);
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;
ps.in_decl = ps.decl_on_line = true;
if ( ps.dec_nest <= 0)
ps.just_saw_decl = 2;
prefix_blankline_requested = 0;
for (i = 0; token[i++];);
if (ps.ind_level == 0 || ps.dec_nest > 0) {
dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i;
tabs_to_var = (use_tabs ? ps.decl_indent > 0 : 0);
} else {
dec_ind = ps.local_decl_indent > 0 ? ps.local_decl_indent : i;
tabs_to_var = (use_tabs ? ps.local_decl_indent > 0 : 0);
}
goto copy_id;
case ident:
if (ps.in_decl) {
if (is_procname == 0 || !procnames_start_line) {
if (!ps.block_init) {
if (troff && !ps.dumped_decl_indent) {
if (ps.want_blank)
*e_code++ = ' ';
ps.want_blank = false;
sprintf(e_code, "\n.De %dp+\200p\n", dec_ind * 7);
ps.dumped_decl_indent = 1;
e_code += strlen(e_code);
} else {
int cur_dec_ind;
int pos, startpos;
startpos = e_code - s_code;
cur_dec_ind = dec_ind;
pos = startpos;
if ((ps.ind_level * ps.ind_size) % 8 != 0) {
pos += (ps.ind_level * ps.ind_size) % 8;
cur_dec_ind += (ps.ind_level * ps.ind_size) % 8;
}
if (tabs_to_var) {
while ((pos & ~7) + 8 <= cur_dec_ind) {
CHECK_SIZE_CODE;
*e_code++ = '\t';
pos = (pos & ~7) + 8;
}
}
while (pos < cur_dec_ind) {
CHECK_SIZE_CODE;
*e_code++ = ' ';
pos++;
}
if (ps.want_blank && e_code - s_code == startpos)
*e_code++ = ' ';
ps.want_blank = false;
}
}
} else {
if (ps.want_blank)
*e_code++ = ' ';
ps.want_blank = false;
if (dec_ind && s_code != e_code)
dump_line();
dec_ind = 0;
}
}
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:
*e_code++ = '.';
ps.want_blank = false;
break;
case comma:
ps.want_blank = (s_code != e_code);
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:
if ((s_com != e_com) ||
(s_lab != e_lab) ||
(s_code != e_code))
dump_line();
*e_lab++ = '#';
{
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 && !had_eof)) {
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) {
if (sc_end == 0)
sc_end = &(save_com[0]);
else {
*sc_end++ = '\n';
*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;
be_save = buf_end;
buf_ptr = save_com;
*sc_end++ = ' ';
buf_end = sc_end;
sc_end = 0;
}
*e_lab = '\0';
ps.pcase = false;
}
if (strncmp(s_lab, "#if", 3) == 0) {
if (blanklines_around_conditional_compilation) {
int c;
prefix_blankline_requested++;
while ((c = getc(input)) == '\n');
ungetc(c, input);
}
if ((size_t)ifdef_level < sizeof(state_stack)/sizeof(state_stack[0])) {
match_state[ifdef_level].tos = -1;
state_stack[ifdef_level++] = ps;
}
else
diag2(1, "#if stack overflow");
}
else if (strncmp(s_lab, "#else", 5) == 0)
if (ifdef_level <= 0)
diag2(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)
diag2(1, "Unmatched #endif");
else {
ifdef_level--;
#ifdef undef
if (match_state[ifdef_level].tos >= 0
&& bcmp(&ps, &match_state[ifdef_level], sizeof ps))
diag2(0, "Syntactically inconsistent #ifdef alternatives");
#endif
}
if (blanklines_around_conditional_compilation) {
postfix_blankline_requested++;
n_real_blanklines = 0;
}
}
break;
case comment:
if (flushed_nl) {
flushed_nl = false;
dump_line();
ps.want_blank = false;
force_nl = false;
}
pr_comment();
break;
}
*e_code = '\0';
if (type_code != comment && type_code != newline && type_code != preesc)
ps.last_token = type_code;
}
}
static void
bakcopy(void)
{
int n,
bakchn;
char buff[8 * 1024];
const char *p;
for (p = in_name; *p; p++);
while (p > in_name && *p != '/')
p--;
if (*p == '/')
p++;
sprintf(bakfile, "%s.BAK", p);
bakchn = creat(bakfile, 0600);
if (bakchn < 0)
err(1, "%s", bakfile);
while ((n = read(fileno(input), buff, sizeof buff)) != 0)
if (write(bakchn, buff, n) != n)
err(1, "%s", bakfile);
if (n < 0)
err(1, "%s", in_name);
close(bakchn);
fclose(input);
input = fopen(bakfile, "r");
if (input == NULL)
err(1, "%s", bakfile);
output = fopen(in_name, "w");
if (output == NULL) {
unlink(bakfile);
err(1, "%s", in_name);
}
}