2.11BSD/src/ucb/indent/indent.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)indent.c 5.4 (Berkeley) 9/10/85";
#endif not lint
/*-
Copyright (C) 1976
by the
Board of Trustees
of the
University of Illinois
All rights reserved
NAME:
indent main program
FUNCTION:
This is the main program of the indent program. Indent will take a C
program source and reformat it into a semi-reasonable form.
ALGORITHM:
The routine lexi scans tokens and passes them back one at a time to the
main routine. The subroutine parse takes care of much of the work of
figuring indentation level.
1) Call lexi
2) Enter a monster switch statement on the code returned by lexi. If
the indentation level for the line yet to be printed should be
changed, set the variable ps.ind_level. If the indentation level for
the following line should be changed, set the variable ps.i_l_follow.
*/
#include "indent_globs.h";
#include "indent_codes.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[32] = "";
main(argc, argv)
int argc;
char **argv;
{
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 */
register int j; /* 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[0] = codebuf[0] = labbuf[0] = ' '; /* set up code, label, and
* comment buffers */
combuf[1] = codebuf[1] = labbuf[1] = '\0';
s_lab = e_lab = labbuf + 1;
s_code = e_code = codebuf + 1;
s_com = e_com = combuf + 1;
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
\*--------------------------------------------------*/
set_defaults();
/*
* Unfortunately, we must look for -npro here because the profiles
* are read before the command line arguments.
*/
for (i = 1; i < argc; ++i)
if (strcmp(argv[i], "-npro") == 0)
break;
if (i >= argc)
set_profile();
input = 0; /* cancel -st if it was in the profiles, */
output = 0; /* as it doesn't make any sense there. */
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 */
fprintf(stderr, "indent: can't open %s\n", argv[i]);
exit(1);
}
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 */
fprintf(stderr, "indent: input and output files must be different\n");
exit(1);
}
output = fopen(out_name, "w");
if (output == 0) { /* check for create error */
fprintf(stderr, "indent: can't create %s\n", argv[i]);
exit(1);
}
continue;
}
fprintf(stderr, "indent: unknown parameter: %s\n", argv[i]);
exit(1);
} else
set_option(argv[i]);
} /* end of for */
if (input == 0) {
printf("Usage: indent file [ outfile ] [ options ]\n");
exit(1);
}
if (output == 0)
if (troff)
output = stdout;
else {
out_name = in_name;
bakcopy();
}
/*
* Adjust parameters that are out of range, or set defaults if
* no values were specified.
*/
if (ps.com_ind <= 1)
ps.com_ind = 2; /* dont put normal comments before column
* 2 */
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 - 8 : ps.com_ind;
if (ps.decl_com_ind <= 1)
ps.decl_com_ind = 2;
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) {
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 */
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 */
is_procname = ps.procname[0];
} /* end of while (serach_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(ps.tos <= 1);
}
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)
*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
\*----------------------------------------------------*/
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 || !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)))
*e_code++ = ' ';
if (ps.in_decl && !ps.block_init)
if (troff && !ps.dumped_decl_indent) {
ps.dumped_decl_indent = 1;
sprintf(e_code, "\\c\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token);
e_code += strlen(e_code);
} else {
while ((e_code - s_code) < dec_ind)
*e_code++ = ' ';
*e_code++ = token[0];
} else
*e_code++ = token[0];
ps.paren_indents[ps.p_l_follow - 1] = e_code - s_code;
ps.want_blank = false;
if (ps.in_or_st && *token == '(') {
/*
* 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 ']' */
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) {
sprintf(e_code, "\\c\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))
*e_code++ = ' '; /* pad it */
}
if (troff && token[0] == '-' && token[1] == '>')
res = "\\(->";
for (t_ptr = res; *t_ptr; ++t_ptr)
*e_code++ = *t_ptr;
}
ps.want_blank = false;
break;
case binary_op: /* any binary operation */
do_binary:
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;
case '-':
if (token[1] == '>')
res = "\\(->";
}
for (t_ptr = res; *t_ptr; ++t_ptr)
*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)
ps.in_parameter_declaration = 0;
ps.cast_mask = 0;
ps.sizeof_mask = 0;
ps.block_init = 0;
ps.just_saw_decl--;
if (ps.in_decl && s_code == e_code && !ps.block_init)
while ((e_code - s_code) < (dec_ind - 1))
*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 */
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 preceding
* 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 */
ps.in_parameter_declaration = 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_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;
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 (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, "\\c\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)
*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++ = BACKSLASH;
*e_code++ = 'f';
*e_code++ = 'B';
}
for (t_ptr = token; *t_ptr; ++t_ptr)
*e_code++ = *t_ptr;
if (troff && ps.its_a_keyword) {
*e_code++ = BACKSLASH;
*e_code++ = 'f';
*e_code++ = 'R';
}
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))
*e_code++ = ' ';
*e_code++ = ',';
if (ps.p_l_follow == 0) {
ps.block_init = 0;
if (break_comma && !ps.leave_comma)
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;
char *com_start = 0;
char quote = 0;
char *com_end = 0;
while (*buf_ptr != '\n' || in_comment) {
*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 - 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;
}
break;
}
}
while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
e_lab--;
if (e_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(com_start, sc_end, com_end - com_start);
sc_end += com_end - com_start;
e_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 (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
}
break; /* subsequent processing of the newline
* character will cause the line to be
* printed */
case comment: /* we have gotten a /* this is a biggie */
proc_comment:
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 */
};
/*
* copy input file to backup file. If in_name is /blah/blah/blah/file, then
* backup file will be "file.BAK". Then make the backup file the input and
* original input file the output.
*/
bakcopy()
{
int n,
bakchn;
char buff[BUFSIZ];
register char *p;
char *rindex();
if ((p = rindex(in_name, '/')) != NULL)
p++;
else
p = in_name;
sprintf(bakfile, "%s.BAK", p);
/* copy in_name to backup file */
bakchn = creat(bakfile, 0600);
if (bakchn < 0) {
fprintf(stderr, "indent: can't create backup file \"%s\"\n", bakfile);
exit(1);
}
while ((n = read(fileno(input), buff, sizeof buff)) > 0)
if (write(bakchn, buff, n) != n) {
fprintf(stderr, "indent: error writing backup file \"%s\"\n",
bakfile);
exit(1);
}
if (n < 0) {
fprintf(stderr, "indent: error reading input file \"%s\"\n", in_name);
exit(1);
}
close(bakchn);
fclose(input);
/* re-open backup file as the input file */
input = fopen(bakfile, "r");
if (input == NULL) {
fprintf(stderr, "indent: can't re-open backup file\n");
exit(1);
}
/* now the original input file will be the output */
output = fopen(in_name, "w");
if (output == NULL) {
fprintf(stderr, "indent: can't create %s\n", in_name);
unlink(bakfile);
exit(1);
}
}