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date and time created 82/10/21 23:58:06 by mckusick
[unix-history] / usr / src / usr.bin / indent / indent.c
static char sccsid[] = "@(#)indent.c 4.1 (Berkeley) %G%";
/*
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 ind_level. If the indentation level for
the following line should be changed, set the variable i_l_follow.
PARAMETERS:
None
RETURNS:
Nothing
GLOBALS:
be_save =
break_comma
bp_save =
btype_2 =
code_lines
com_ind =
com_lines
dec_nest =
decl_com_ind =
decl_on_line =
i_l_follow =
in_decl =
ind_level =
ind_size =
ind_stmt =
last_u_d =
leave_comma =
line_no =
ljust_decl =
max_col =
out_coms
out_lines
p_l_follow =
paren_level =
pcase =
sc_end =
unindent_displace =
use_ff =
verbose =
CALLS:
atoi (lib)
cmp
creat (lib)
dump_line
eqin
fill_buffer
lexi
open (lib)
parse
pr_comment
printf (lib)
seek (lib)
time (lib)
CALLED BY:
No one (main routine)
HISTORY:
November 1976 D A Willcox of CAC Initial coding
12/9/76 D A Willcox of CAC Fixed defaults for decl_com_ind
to be 8 less than com_ind if
left justifying declarations
12/9/76 D A Willcox of CAC Fixed processing of nested
<c>?<s>:<s> constructs
1/7/77 D A Willcox of CAC Added check for overwrite of
input file
Added code to handle -br and -bl
parameters
\f*/
#include "indent_globs.h";
#include "indent_codes.h";
/* #define dolog 1 /* if this define is removed, then the code to
produce a log file will be removed */
struct templ { /* this is a template for the list of
command line args */
char *str; /* pointer to string which is a valid
command line arg */
int code; /* code to be used in switch for processing
this arg */
};
struct templ options[] =
{ /* warning - because of the way that this
table is scanned, if one entry is an
initial substring of another, then the
longer entry should occur first */
"-cd", 4,
"-c", 2,
"-l", 1,
"-i", 3,
"-v", 5,
"-nv", 6,
"-dj", 7,
"-d", 13, /* unindented comment placement */
"-ndj", 8,
"-bc", 10, /* break after command in decl */
"-nbc", 9, /* don't break after comma */
"-br", 14, /* put brace on right of stmt */
"-bl", 15, /* put brace on left by itself */
"-st", 16, /* use the standard input and output
files */
0, 0
};
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] = "";
\f
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 */
int in_or_st; /* Will be true iff there has been a
declarator (e.g. int or char) and no
left paren since the last semicolon.
When true, a { is starting a structure
definition or an initialization list */
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 want_blank; /* set to true when the following token
should be prefixed by a blank. (Said
prefixing is ignored in some cases.) */
#ifdef dolog /* include declarations needed for log */
int log_fid; /* fid of log file */
struct logtmpl { /* structure of a log entry */
int tvec[2]; /* time of execution */
char inp; /* input fid */
char outp; /* output fid */
int nout; /* # output lines */
int ncom; /* # comments */
int wcom; /* # lines w/ comments */
int wcode; /* # lines w/code */
char mc; /* max line size */
char ci; /* comment indentation */
char inds; /* indent size */
char dci; /* decl comment indentation */
char verb; /* verbose */
char ljus; /* left just */
char lvcom; /* leave commas */
char unin; /* unindented comment indentation */
char uid; /* the user id */
char bropt; /* btype_2 */
int reserved[2];
};
struct logtmpl logent;
#endif
\f
/*-----------------------------------------------*\
| INITIALIZATION
\*-----------------------------------------------*/
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 = in_decl = decl_on_line = break_comma = false;
sp_sw = force_nl = false;
in_or_st = false;
bl_line = true;
dec_ind = 0;
di_stack[dec_nest = 0] = 0;
want_blank = in_stmt = ind_stmt = false;
scase = pcase = false;
squest = 0;
sc_end = 0;
bp_save = 0;
be_save = 0;
input = -1;
output = -1;
ljust_decl = d_ljust;
/*--------------------------------------------------*\
| COMMAND LINE SCAN
\*--------------------------------------------------*/
max_col = d_max_col; /* set up some default values */
com_ind = d_com_ind;
ind_size = d_ind_size;
verbose = d_verbose;
decl_com_ind = 0; /* if this is not set to some positive
value by an arg, we will set this equal
to com_ind */
btype_2 = d_btype_2;
unindent_displace = d_unindent;
leave_comma = d_leave_comma;
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 = open (in_name, 0);
if (input < 0) { /* check for open error */
printf ("Can't open %s\n", argv[i]);
exit ();
}
continue;
}
else
if (output < 0) { /* we have the output file */
out_name = argv[i]; /* remember name of output file */
if (cmp (in_name, out_name) == 0) { /* attempt to
overwright the file */
printf ("Input and output files must be different\n");
exit ();
}
output = creat (out_name, 0644);
if (output < 0) { /* check for create error */
printf ("Can't create %s\n", argv[i]);
exit ();
}
continue;
}
printf ("Unknown parameter: %s\n", argv[i]);
exit ();
}
else
set_option (argv[i]);
} /* end of for */
if (input < 0) {
printf ("Usage: indent file [ outfile ] [ options ]\n");
exit ();
}
if (output < 0) {
out_name = in_name;
bakcopy ();
}
if (com_ind <= 1)
com_ind = 2; /* don't put normal comments before column
2 */
if (decl_com_ind <= 0) /* if not specified by user, set this */
decl_com_ind = ljust_decl ? (com_ind <= 10 ? 2 : com_ind - 8) : com_ind;
fill_buffer (); /* get first batch of stuff into input
buffer */
parse (semicolon);
\f/*-----------------------------------------------------
| START OF MAIN LOOP
\*----------------------------------------------------*/
while (1) { /* this is the main loop. it will go until
we reach eof */
type_code = lexi (); /* lexi reads one token. The actual
characters read are stored in "token".
lexi returns a code indicating the type
of token */
/*
* 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 (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 wasn't stored up */
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 */
}
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 (sc_end == 0) {
/* ignore buffering if comment wasn't saved up */
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 */
printf ("%d: Line broken\n", line_no);
flushed_nl = false;
}
for (t_ptr = token; *t_ptr; ++t_ptr)
*sc_end++ = *t_ptr;
/* copy token into temp buffer */
sw_buffer:
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;
case comment: /* we have a comment, so we must copy it
into the buffer */
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 */
printf ("%d: Internal buffer overflow.\n",
line_no);
printf ("Move big comment from right after if,\
while, or whatever.\n");
exit ();
}
}
*sc_end++ = '/';
/* add ending slash */
if (++buf_ptr >= buf_end)/* get past / in buffer */
fill_buffer ();
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 */
} /* end of while (serach_brace) */
check_type:
\f
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 (i_l_follow != 0)/* check for balanced braces */
printf ("%d too few }'s\n", i_l_follow);
#ifdef dolog /* only include this stuff if we want to
keep a log */
log_fid = open ("/mnt/net/willcox/indent/indent_log", 1);
/* open the log file */
if (log_fid >= 0) {
seek (log_fid, 0, 2);
/* point to end of log */
time (logent.tvec);
/* get current time */
logent.inp = input;
/* set up the log entry */
logent.outp = output;
logent.nout = out_lines;
logent.ncom = out_coms;
logent.wcom = com_lines;
logent.wcode = code_lines;
logent.mc = max_col;
logent.ci = com_ind;
logent.inds = ind_size;
logent.dci = decl_com_ind;
logent.verb = verbose;
logent.ljus = ljust_decl;
logent.lvcom = leave_comma;
logent.unin = unindent_displace;
logent.uid = getuid ();
logent.bropt = btype_2;
write (log_fid, &logent, sizeof logent);
}
#endif
if (verbose) {
printf ("There were %d output lines and %d comments\n",
out_lines, out_coms);
printf ("(Lines with comments)/(Lines with code): %6.3f\n",
(1.0 * com_lines) / code_lines);
}
exit ();
}
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)
printf ("%d: Line broken\n", line_no);
flushed_nl = false;
dump_line ();
want_blank = false;
/* don't insert blank at line start */
force_nl = false;
}
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 */
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 */
use_ff = true; /* a form feed is treated much like a
newline */
dump_line ();
want_blank = false;
break;
case newline:
dump_line ();
++line_no; /* keep track of input line number */
want_blank = false;
break;
case lparen: /* got a ( or [ */
++p_l_follow; /* count parens to make Healy happy */
if (want_blank && *token != '[')
/* don't put space in front of square
bracket */
*e_code++ = ' ';
if (in_decl)
while ((e_code - s_code) < dec_ind)
*e_code++ = ' ';
*e_code++ = token[0];
want_blank = false;
if (in_or_st && *token == '(') {
/* this is a kluge to make sure that declarations will be
aaigned right if proc decl has an explicit type on it,
i.e. "int a(x) {..." */
parse (semicolon);
/* I said this was a kluge... */
in_or_st = false;
/* turn off flag for structure decl or initialization */
}
break;
case rparen: /* got a ) or ] */
if (--p_l_follow < 0) {
p_l_follow = 0;
printf ("%d: Extra %c\n", line_no, *token);
}
if (e_code == s_code)/* if the paren starts the line */
paren_level = p_l_follow;
/* then indent it */
*e_code++ = token[0];
want_blank = true;
if (sp_sw && (p_l_follow == 0)) {
/* check for end of if (...), or some such */
sp_sw = false;
force_nl = true;
/* must force newline after if */
last_u_d = true;
/* inform lexi that a following operator is unary */
in_stmt = false;
/* don't use stmt continuation indentation */
parse (hd_type);
/* let parser worry about if, or whatever */
}
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 (want_blank)
*e_code++ = ' ';
if (in_decl) { /* 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 */
}
for (t_ptr = token; *t_ptr; ++t_ptr)
*e_code++ = *t_ptr;
/* move the token to buffer */
want_blank = false;
break;
case binary_op: /* any binary operation */
do_binary:
if (want_blank)
*e_code++ = ' ';
for (t_ptr = token; *t_ptr; ++t_ptr)
*e_code++ = *t_ptr;
/* move the operator */
want_blank = true;
break;
case postop: /* got a trailing ++ or -- */
*e_code++ = token[0];
*e_code++ = token[1];
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 (want_blank)
*e_code++ = ' ';
*e_code++ = '?';
want_blank = true;
break;
case casestmt: /* got word 'case' or 'default' */
scase = true; /* so we can process the later colon
properly */
if (want_blank)
*e_code++ = ' ';
for (t_ptr = token; *t_ptr; ++t_ptr)
*e_code++ = *t_ptr;
want_blank = true;
break;
case colon: /* got a ':' */
if (squest > 0) {
/* it is part of the <c>?<n>: <n> construct */
--squest;
if (want_blank)
*e_code++ = ' ';
*e_code++ = ':';
want_blank = true;
break;
}
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 = pcase = scase;
/* 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;
want_blank = false;
break;
case semicolon: /* got a ';' */
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 (in_decl && s_code == e_code)
/* align this in a declaration */
while ((e_code - s_code) < (dec_ind - 1))
*e_code++ = ' ';
in_decl = (dec_nest > 0);
/* if we were in a first level structure declaration, we
aren't any more */
if ((!sp_sw || hd_type != forstmt) && 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 */
printf ("%d: Unbalanced parens\n", line_no);
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);
/* don't lose the if, or whatever */
}
}
*e_code++ = ';';
want_blank = true;
in_stmt = (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 { */
in_stmt = false;
/* don't indent the { */
force_nl = true;
/* force other stuff on same line as { onto new line */
if (s_code != e_code && !btype_2) {
/* bracket is not alone on line */
if (verbose)
printf ("%d: Line broken\n", line_no);
dump_line ();
want_blank = false;
}
if (p_l_follow > 0) {
/* check for preceeding unbalanced parens */
printf ("%d: Unbalanced parens\n", line_no);
p_l_follow = 0;
if (sp_sw) {
/* check for unclosed if, for, etc. */
sp_sw = false;
parse (hd_type);
ind_level = i_l_follow;
}
}
if (s_code == e_code)
ind_stmt = false;
/* don't put extra indentation on line with '{' */
if (in_decl && in_or_st) {
/* this is either a structure declaration or an init */
di_stack[dec_nest++] = dec_ind;
dec_ind = 0;
}
else
decl_on_line = false;
/* we can't be in the middle of a declaration, so don't do
special indentation of comments */
parse (lbrace);/* let parser know about this */
if (want_blank)/* put a blank before { if { is not at
start of line */
*e_code++ = ' ';
want_blank = false;
*e_code++ = '{';
break;
case rbrace: /* got a } */
if (p_l_follow) {
/* check for unclosed if, for, else. */
printf ("%d: Unbalanced parens\n", line_no);
p_l_follow = 0;
sp_sw = false;
}
if (s_code != e_code) {
/* } must be first on line */
if (verbose)
printf ("%d: Line broken\n", line_no);
dump_line ();
}
*e_code++ = '}';
want_blank = true;
in_stmt = ind_stmt = false;
if (dec_nest > 0) {
/* we are in multi-level structure declaration */
dec_ind = di_stack[--dec_nest];
in_decl = true;
}
parse (rbrace);/* let parser know about this */
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 */
in_stmt = false;
if (e_code != s_code) {
/* make sure this starts a line */
if (verbose)
printf ("%d: Line broken\n", line_no);
dump_line ();
want_blank = false;
}
force_nl = true;
/* also, following stuff must go onto new line */
parse (*token == 'e' ? elselit : dolit);
/* pass token on to parser */
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 */
in_or_st = true;
/* this might be a structure or initialization declaration */
in_decl = decl_on_line = true;
for (i = 0; token[i++];);
/* get length of token */
if (i <= 3)
i = 4;
dec_ind = ((e_code - s_code + i) / ind_size + 1) * ind_size;
/* this will tell us how far to indent subsequent identifiers
*/
goto copy_id;
case ident: /* got an identifier or constant */
if (in_decl) { /* if we are in a declaration, we must
indent identifier */
if (want_blank)
*e_code++ = ' ';
want_blank = false;
while ((e_code - s_code) < dec_ind)
*e_code++ = ' ';
}
else
if (sp_sw && p_l_follow == 0) {
/* check for if expr w/o parens *//* this will make
JRM's obsurd "for ever" statements work */
sp_sw = false;
force_nl = true;
last_u_d = true;
in_stmt = false;
parse (hd_type);
}
copy_id:
if (want_blank)
*e_code++ = ' ';
for (t_ptr = token; *t_ptr; ++t_ptr)
*e_code++ = *t_ptr;
want_blank = true;
break;
case period: /* treat a period kind of like a binary
operation */
*e_code++ = '.';
/* move the period into line */
want_blank = false;
/* don't put a blank after a period */
break;
case comma:
want_blank = (s_code != e_code);
/* only put blank after comma if comma does not start the line
*/
if (in_decl) /* align these in a declaration */
while ((e_code - s_code) < (dec_ind - 1))
*e_code++ = ' ';
*e_code++ = ',';
if (break_comma && p_l_follow == 0 && !leave_comma)
force_nl = true;
break;
case preesc: /* got the character '#' */
if (
(s_com != e_com) ||
(s_lab != e_lab) ||
(s_code != e_code)) {
/* true iff the '#' was not at start of the line */
printf ("%d: What is this # doing here?\n", line_no);
goto do_binary;
/* treat it as a binary operator */
}
*e_lab++ = '#';/* move whole line to 'label' buffer */
while (*buf_ptr != '\n') {
*e_lab = *buf_ptr++;
if (buf_ptr >= buf_end)
fill_buffer ();
if (*e_lab++ == '/' && *buf_ptr == '*') {
/* check for comment on preprocessor line */
e_lab - = 2;
/* skip back over slash */
while (*e_lab == '\t' || *e_lab == ' ')
--e_lab;
/* strip off trailing blanks and tabs */
*(++e_lab) = '\0';
/* null terminate the line */
if (++buf_ptr >= buf_end)
/* space past start of comment */
fill_buffer ();
col_1 = false;
/* don't let pr_comment think that this comment starts
in column 1 */
decl_on_line = true;
/* treat this as a declaration for comment placement
purposes */
goto proc_comment;
/* go process the comment */
}
}
*e_lab = '\0'; /* null terminate line */
pcase = false;
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:
pr_comment ();
break;
} /* end of big switch stmt */
*e_code = '\0'; /* make sure code section is null
terminated */
} /* 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 ".Bfile"
* then make the backup file the input and original
* input file the output
*/
bakcopy () {
int n,
bakchn;
char buff[512];
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, ".B%s", p);
/* copy in_name to backup file */
bakchn = creat (bakfile, 0600);
if (bakchn < 0) {
printf ("can't create backup file \"%s\"\n", bakfile);
exit ();
}
while (n = read (input, buff, 512))
write (bakchn, buff, n);
close (bakchn);
close (input);
/* re-open backup file as the input file */
input = open (bakfile, 0);
if (input < 0) {
printf ("can't re-open backup file\n");
exit ();
}
/* now the original input file will be the output */
output = creat (in_name, 0644);
if (output < 0) {
printf ("can't create %s\n", in_name);
unlink (bakfile);
exit ();
}
}
set_option (arg)
char *arg;
{
register j;
for (j = 0; options[j].str != 0; ++j) {
/* look thru list of possible options */
if (eqin (options[j].str, arg)) {
set_var (j, arg);
break; /* get out of for loop */
}
}
if (options[j].str == 0) { /* illegal arg given */
printf ("Unknown parameter: %s\n", arg);
exit ();
}
}
set_var (j, arg)
char *arg;
{
switch (options[j].code) {
case 1: /* have -lnnn */
max_col = atoi (&arg[2]);
break;
case 2: /* have -cnnn */
com_ind = atoi (&arg[2]);
break;
case 3: /* have -innn */
ind_size = atoi (&arg[2]);
break;
case 4: /* have -cdnnn */
decl_com_ind = atoi (&arg[3]);
break;
case 5: /* have -v */
verbose = true;
break;
case 6: /* have -nv */
verbose = false;
break;
case 7: /* have -dj */
ljust_decl = true;
break;
case 8: /* have -ndj */
ljust_decl = false;
break;
case 9: /* -nbc */
leave_comma = true;
break;
case 10: /* -bc */
leave_comma = false;
break;
case 13: /* -dnnn */
unindent_displace = atoi (&arg[2]);
break;
case 14: /* -br */
btype_2 = true;
break;
case 15: /* -bl */
btype_2 = false;
break;
case 16:
if(input<0) input = 0;
if(output<0) output = 1;
break;
}
}
/*
* GETPRO - get profile file
* profile file is max 127 characters
*/
getpro (name, buf)
char *name, /* profile file name, as in '.indent.pro'
*/
*buf; /* will receive contents of .pro file */
{
register chn,
n;
char file[32];
file[0] = 0;
strcat (file, getenv ("HOME"));
strcat (file, "/");
strcat (file, name);
chn = open (file, 0);
if (chn < 0)
return (-1);
n = read (chn, buf, 127);
if (n < 0)
return (-1);
buf[n--] = 0; /* null terminate line */
if (buf[n] == '\n')
buf[n] = 0;
close (chn);
return (0);
}
/*
* strip off arguments in a string:
* p is address of a character pointer
* nextchr returns pointer to front of first arg
* arg is null terminated.
* p is reset to after arg for subsequent calls
*/
char *nxtarg (p)
char **p;
{
register char *f,
*b;
f = b = *p;
while (*f && (*f == ' ' || *f == '\t'))
f++;
while (*b && (*b != ' ' && *b != '\t'))
b++;
if (*b != 0)
*b++ = 0;
*p = b;
return (f);
}
set_profile () {
char line[128],
*b;
register char *f;
extern char *nxtarg ();
if (getpro (".indent.pro", line) < 0)
return;
b = line;
if(verbose) printf ("profile: %s\n", b);
while (*(f = nxtarg (&b)))
set_option (f);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.