usr.bin/indent/indent.c

   1 /*
   2  * Copyright (c) 1985 Sun Microsystems, Inc.
   3  * Copyright (c) 1976 Board of Trustees of the University of Illinois.
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * @(#) Copyright (c) 1985 Sun Microsystems, Inc.
  36  * @(#) Copyright (c) 1976 Board of Trustees of the University of Illinois.
  37  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  38  * @(#)indent.c 5.17 (Berkeley) 6/7/93
  39  * $FreeBSD: src/usr.bin/indent/indent.c,v 1.25 2006/09/13 05:06:12 charnier Exp $
  40  * $DragonFly: src/usr.bin/indent/indent.c,v 1.4 2007/05/13 18:33:58 swildner Exp $
  41  */
  42
  43 #include <sys/param.h>
  44 #include <err.h>
  45 #include <fcntl.h>
  46 #include <unistd.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <ctype.h>
  51 #include "indent_globs.h"
  52 #include "indent_codes.h"
  53 #include "indent.h"
  54
  55 static void bakcopy(void);
  56
  57 const char *in_name = "Standard Input"; /* will always point to name of input
  58                                          * file */
  59 const char *out_name = "Standard Output";       /* will always point to name
  60                                                  * of output file */
  61 char        bakfile[MAXPATHLEN] = "";
  62
  63 int
  64 main(int argc, char **argv)
  65 {
  66
  67     int         dec_ind;        /* current indentation for declarations */
  68     int         di_stack[20];   /* a stack of structure indentation levels */
  69     int         flushed_nl;     /* used when buffering up comments to remember
  70                                  * that a newline was passed over */
  71     int         force_nl;       /* when true, code must be broken */
  72     int         hd_type = 0;    /* used to store type of stmt for if (...),
  73                                  * for (...), etc */
  74     int i;                      /* local loop counter */
  75     int         scase;          /* set to true when we see a case, so we will
  76                                  * know what to do with the following colon */
  77     int         sp_sw;          /* when true, we are in the expression of
  78                                  * if(...), while(...), etc. */
  79     int         squest;         /* when this is positive, we have seen a ?
  80                                  * without the matching : in a <c>?<s>:<s>
  81                                  * construct */
  82     const char *t_ptr;          /* used for copying tokens */
  83     int         tabs_to_var;    /* true if using tabs to indent to var name */
  84     int         type_code;      /* the type of token, returned by lexi */
  85
  86     int         last_else = 0;  /* true iff last keyword was an else */
  87
  88
  89     /*-----------------------------------------------*\
  90     |                 INITIALIZATION                  |
  91     \*-----------------------------------------------*/
  92
  93     found_err = 0;
  94
  95     ps.p_stack[0] = stmt;       /* this is the parser's stack */
  96     ps.last_nl = true;          /* this is true if the last thing scanned was
  97                                  * a newline */
  98     ps.last_token = semicolon;
  99     combuf = (char *) malloc(bufsize);
 100     if (combuf == NULL)
 101         err(1, NULL);
 102     labbuf = (char *) malloc(bufsize);
 103     if (labbuf == NULL)
 104         err(1, NULL);
 105     codebuf = (char *) malloc(bufsize);
 106     if (codebuf == NULL)
 107         err(1, NULL);
 108     tokenbuf = (char *) malloc(bufsize);
 109     if (tokenbuf == NULL)
 110         err(1, NULL);
 111     l_com = combuf + bufsize - 5;
 112     l_lab = labbuf + bufsize - 5;
 113     l_code = codebuf + bufsize - 5;
 114     l_token = tokenbuf + bufsize - 5;
 115     combuf[0] = codebuf[0] = labbuf[0] = ' ';   /* set up code, label, and
 116                                                  * comment buffers */
 117     combuf[1] = codebuf[1] = labbuf[1] = '\0';
 118     ps.else_if = 1;             /* Default else-if special processing to on */
 119     s_lab = e_lab = labbuf + 1;
 120     s_code = e_code = codebuf + 1;
 121     s_com = e_com = combuf + 1;
 122     s_token = e_token = tokenbuf + 1;
 123
 124     in_buffer = (char *) malloc(10);
 125     if (in_buffer == NULL)
 126         err(1, NULL);
 127     in_buffer_limit = in_buffer + 8;
 128     buf_ptr = buf_end = in_buffer;
 129     line_no = 1;
 130     had_eof = ps.in_decl = ps.decl_on_line = break_comma = false;
 131     sp_sw = force_nl = false;
 132     ps.in_or_st = false;
 133     ps.bl_line = true;
 134     dec_ind = 0;
 135     di_stack[ps.dec_nest = 0] = 0;
 136     ps.want_blank = ps.in_stmt = ps.ind_stmt = false;
 137
 138     scase = ps.pcase = false;
 139     squest = 0;
 140     sc_end = 0;
 141     bp_save = 0;
 142     be_save = 0;
 143
 144     output = 0;
 145     tabs_to_var = 0;
 146
 147     /*--------------------------------------------------*\
 148     |                   COMMAND LINE SCAN                |
 149     \*--------------------------------------------------*/
 150
 151 #ifdef undef
 152     max_col = 78;               /* -l78 */
 153     lineup_to_parens = 1;       /* -lp */
 154     ps.ljust_decl = 0;          /* -ndj */
 155     ps.com_ind = 33;            /* -c33 */
 156     star_comment_cont = 1;      /* -sc */
 157     ps.ind_size = 8;            /* -i8 */
 158     verbose = 0;
 159     ps.decl_indent = 16;        /* -di16 */
 160     ps.local_decl_indent = -1;  /* if this is not set to some nonnegative value
 161                                  * by an arg, we will set this equal to
 162                                  * ps.decl_ind */
 163     ps.indent_parameters = 1;   /* -ip */
 164     ps.decl_com_ind = 0;        /* if this is not set to some positive value
 165                                  * by an arg, we will set this equal to
 166                                  * ps.com_ind */
 167     btype_2 = 1;                /* -br */
 168     cuddle_else = 1;            /* -ce */
 169     ps.unindent_displace = 0;   /* -d0 */
 170     ps.case_indent = 0;         /* -cli0 */
 171     format_block_comments = 1;  /* -fcb */
 172     format_col1_comments = 1;   /* -fc1 */
 173     procnames_start_line = 1;   /* -psl */
 174     proc_calls_space = 0;       /* -npcs */
 175     comment_delimiter_on_blankline = 1; /* -cdb */
 176     ps.leave_comma = 1;         /* -nbc */
 177 #endif
 178
 179     for (i = 1; i < argc; ++i)
 180         if (strcmp(argv[i], "-npro") == 0)
 181             break;
 182     set_defaults();
 183     if (i >= argc)
 184         set_profile();
 185
 186     for (i = 1; i < argc; ++i) {
 187
 188         /*
 189          * look thru args (if any) for changes to defaults
 190          */
 191         if (argv[i][0] != '-') {/* no flag on parameter */
 192             if (input == 0) {   /* we must have the input file */
 193                 in_name = argv[i];      /* remember name of input file */
 194                 input = fopen(in_name, "r");
 195                 if (input == 0)         /* check for open error */
 196                         err(1, "%s", in_name);
 197                 continue;
 198             }
 199             else if (output == 0) {     /* we have the output file */
 200                 out_name = argv[i];     /* remember name of output file */
 201                 if (strcmp(in_name, out_name) == 0) {   /* attempt to overwrite
 202                                                          * the file */
 203                     errx(1, "input and output files must be different");
 204                 }
 205                 output = fopen(out_name, "w");
 206                 if (output == 0)        /* check for create error */
 207                         err(1, "%s", out_name);
 208                 continue;
 209             }
 210             errx(1, "unknown parameter: %s", argv[i]);
 211         }
 212         else
 213             set_option(argv[i]);
 214     }                           /* end of for */
 215     if (input == 0)
 216         input = stdin;
 217     if (output == 0) {
 218         if (troff || input == stdin)
 219             output = stdout;
 220         else {
 221             out_name = in_name;
 222             bakcopy();
 223         }
 224     }
 225     if (ps.com_ind <= 1)
 226         ps.com_ind = 2;         /* dont put normal comments before column 2 */
 227     if (troff) {
 228         if (bodyf.font[0] == 0)
 229             parsefont(&bodyf, "R");
 230         if (scomf.font[0] == 0)
 231             parsefont(&scomf, "I");
 232         if (blkcomf.font[0] == 0)
 233             blkcomf = scomf, blkcomf.size += 2;
 234         if (boxcomf.font[0] == 0)
 235             boxcomf = blkcomf;
 236         if (stringf.font[0] == 0)
 237             parsefont(&stringf, "L");
 238         if (keywordf.font[0] == 0)
 239             parsefont(&keywordf, "B");
 240         writefdef(&bodyf, 'B');
 241         writefdef(&scomf, 'C');
 242         writefdef(&blkcomf, 'L');
 243         writefdef(&boxcomf, 'X');
 244         writefdef(&stringf, 'S');
 245         writefdef(&keywordf, 'K');
 246     }
 247     if (block_comment_max_col <= 0)
 248         block_comment_max_col = max_col;
 249     if (ps.local_decl_indent < 0)       /* if not specified by user, set this */
 250         ps.local_decl_indent = ps.decl_indent;
 251     if (ps.decl_com_ind <= 0)   /* if not specified by user, set this */
 252         ps.decl_com_ind = ps.ljust_decl ? (ps.com_ind <= 10 ? 2 : ps.com_ind - 8) : ps.com_ind;
 253     if (continuation_indent == 0)
 254         continuation_indent = ps.ind_size;
 255     fill_buffer();              /* get first batch of stuff into input buffer */
 256
 257     parse(semicolon);
 258     {
 259         char *p = buf_ptr;
 260         int col = 1;
 261
 262         while (1) {
 263             if (*p == ' ')
 264                 col++;
 265             else if (*p == '\t')
 266                 col = ((col - 1) & ~7) + 9;
 267             else
 268                 break;
 269             p++;
 270         }
 271         if (col > ps.ind_size)
 272             ps.ind_level = ps.i_l_follow = col / ps.ind_size;
 273     }
 274     if (troff) {
 275         const char *p = in_name,
 276                    *beg = in_name;
 277
 278         while (*p)
 279             if (*p++ == '/')
 280                 beg = p;
 281         fprintf(output, ".Fn \"%s\"\n", beg);
 282     }
 283     /*
 284      * START OF MAIN LOOP
 285      */
 286
 287     while (1) {                 /* this is the main loop.  it will go until we
 288                                  * reach eof */
 289         int         is_procname;
 290
 291         type_code = lexi();     /* lexi reads one token.  The actual
 292                                  * characters read are stored in "token". lexi
 293                                  * returns a code indicating the type of token */
 294         is_procname = ps.procname[0];
 295
 296         /*
 297          * The following code moves everything following an if (), while (),
 298          * else, etc. up to the start of the following stmt to a buffer. This
 299          * allows proper handling of both kinds of brace placement.
 300          */
 301
 302         flushed_nl = false;
 303         while (ps.search_brace) {       /* if we scanned an if(), while(),
 304                                          * etc., we might need to copy stuff
 305                                          * into a buffer we must loop, copying
 306                                          * stuff into save_com, until we find
 307                                          * the start of the stmt which follows
 308                                          * the if, or whatever */
 309             switch (type_code) {
 310             case newline:
 311                 ++line_no;
 312                 flushed_nl = true;
 313             case form_feed:
 314                 break;          /* form feeds and newlines found here will be
 315                                  * ignored */
 316
 317             case lbrace:        /* this is a brace that starts the compound
 318                                  * stmt */
 319                 if (sc_end == 0) {      /* ignore buffering if a comment wasnt
 320                                          * stored up */
 321                     ps.search_brace = false;
 322                     goto check_type;
 323                 }
 324                 if (btype_2) {
 325                     save_com[0] = '{';  /* we either want to put the brace
 326                                          * right after the if */
 327                     goto sw_buffer;     /* go to common code to get out of
 328                                          * this loop */
 329                 }
 330             case comment:       /* we have a comment, so we must copy it into
 331                                  * the buffer */
 332                 if (!flushed_nl || sc_end != 0) {
 333                     if (sc_end == 0) {  /* if this is the first comment, we
 334                                          * must set up the buffer */
 335                         save_com[0] = save_com[1] = ' ';
 336                         sc_end = &(save_com[2]);
 337                     }
 338                     else {
 339                         *sc_end++ = '\n';       /* add newline between
 340                                                  * comments */
 341                         *sc_end++ = ' ';
 342                         --line_no;
 343                     }
 344                     *sc_end++ = '/';    /* copy in start of comment */
 345                     *sc_end++ = '*';
 346
 347                     for (;;) {  /* loop until we get to the end of the comment */
 348                         *sc_end = *buf_ptr++;
 349                         if (buf_ptr >= buf_end)
 350                             fill_buffer();
 351
 352                         if (*sc_end++ == '*' && *buf_ptr == '/')
 353                             break;      /* we are at end of comment */
 354
 355                         if (sc_end >= &(save_com[sc_size])) {   /* check for temp buffer
 356                                                                  * overflow */
 357                             diag2(1, "Internal buffer overflow - Move big comment from right after if, while, or whatever");
 358                             fflush(output);
 359                             exit(1);
 360                         }
 361                     }
 362                     *sc_end++ = '/';    /* add ending slash */
 363                     if (++buf_ptr >= buf_end)   /* get past / in buffer */
 364                         fill_buffer();
 365                     break;
 366                 }
 367             default:            /* it is the start of a normal statement */
 368                 if (flushed_nl) /* if we flushed a newline, make sure it is
 369                                  * put back */
 370                     force_nl = true;
 371                 if ((type_code == sp_paren && *token == 'i'
 372                         && last_else && ps.else_if)
 373                         || (type_code == sp_nparen && *token == 'e'
 374                         && e_code != s_code && e_code[-1] == '}'))
 375                     force_nl = false;
 376
 377                 if (sc_end == 0) {      /* ignore buffering if comment wasnt
 378                                          * saved up */
 379                     ps.search_brace = false;
 380                     goto check_type;
 381                 }
 382                 if (force_nl) { /* if we should insert a nl here, put it into
 383                                  * the buffer */
 384                     force_nl = false;
 385                     --line_no;  /* this will be re-increased when the nl is
 386                                  * read from the buffer */
 387                     *sc_end++ = '\n';
 388                     *sc_end++ = ' ';
 389                     if (verbose && !flushed_nl) /* print error msg if the line
 390                                                  * was not already broken */
 391                         diag2(0, "Line broken");
 392                     flushed_nl = false;
 393                 }
 394                 for (t_ptr = token; *t_ptr; ++t_ptr)
 395                     *sc_end++ = *t_ptr; /* copy token into temp buffer */
 396                 ps.procname[0] = 0;
 397
 398         sw_buffer:
 399                 ps.search_brace = false;        /* stop looking for start of
 400                                                  * stmt */
 401                 bp_save = buf_ptr;      /* save current input buffer */
 402                 be_save = buf_end;
 403                 buf_ptr = save_com;     /* fix so that subsequent calls to
 404                                          * lexi will take tokens out of
 405                                          * save_com */
 406                 *sc_end++ = ' ';/* add trailing blank, just in case */
 407                 buf_end = sc_end;
 408                 sc_end = 0;
 409                 break;
 410             }                   /* end of switch */
 411             if (type_code != 0) /* we must make this check, just in case there
 412                                  * was an unexpected EOF */
 413                 type_code = lexi();     /* read another token */
 414             /* if (ps.search_brace) ps.procname[0] = 0; */
 415             if ((is_procname = ps.procname[0]) && flushed_nl
 416                     && !procnames_start_line && ps.in_decl
 417                     && type_code == ident)
 418                 flushed_nl = 0;
 419         }                       /* end of while (search_brace) */
 420         last_else = 0;
 421 check_type:
 422         if (type_code == 0) {   /* we got eof */
 423             if (s_lab != e_lab || s_code != e_code
 424                     || s_com != e_com)  /* must dump end of line */
 425                 dump_line();
 426             if (ps.tos > 1)     /* check for balanced braces */
 427                 diag2(1, "Stuff missing from end of file");
 428
 429             if (verbose) {
 430                 printf("There were %d output lines and %d comments\n",
 431                        ps.out_lines, ps.out_coms);
 432                 printf("(Lines with comments)/(Lines with code): %6.3f\n",
 433                        (1.0 * ps.com_lines) / code_lines);
 434             }
 435             fflush(output);
 436             exit(found_err);
 437         }
 438         if (
 439                 (type_code != comment) &&
 440                 (type_code != newline) &&
 441                 (type_code != preesc) &&
 442                 (type_code != form_feed)) {
 443             if (force_nl &&
 444                     (type_code != semicolon) &&
 445                     (type_code != lbrace || !btype_2)) {
 446                 /* we should force a broken line here */
 447                 if (verbose && !flushed_nl)
 448                     diag2(0, "Line broken");
 449                 flushed_nl = false;
 450                 dump_line();
 451                 ps.want_blank = false;  /* dont insert blank at line start */
 452                 force_nl = false;
 453             }
 454             ps.in_stmt = true;  /* turn on flag which causes an extra level of
 455                                  * indentation. this is turned off by a ; or
 456                                  * '}' */
 457             if (s_com != e_com) {       /* the turkey has embedded a comment
 458                                          * in a line. fix it */
 459                 *e_code++ = ' ';
 460                 for (t_ptr = s_com; *t_ptr; ++t_ptr) {
 461                     CHECK_SIZE_CODE;
 462                     *e_code++ = *t_ptr;
 463                 }
 464                 *e_code++ = ' ';
 465                 *e_code = '\0'; /* null terminate code sect */
 466                 ps.want_blank = false;
 467                 e_com = s_com;
 468             }
 469         }
 470         else if (type_code != comment)  /* preserve force_nl thru a comment */
 471             force_nl = false;   /* cancel forced newline after newline, form
 472                                  * feed, etc */
 473
 474
 475
 476         /*-----------------------------------------------------*\
 477         |          do switch on type of token scanned           |
 478         \*-----------------------------------------------------*/
 479         CHECK_SIZE_CODE;
 480         switch (type_code) {    /* now, decide what to do with the token */
 481
 482         case form_feed: /* found a form feed in line */
 483             ps.use_ff = true;   /* a form feed is treated much like a newline */
 484             dump_line();
 485             ps.want_blank = false;
 486             break;
 487
 488         case newline:
 489             if (ps.last_token != comma || ps.p_l_follow > 0
 490                     || !ps.leave_comma || ps.block_init || !break_comma || s_com != e_com) {
 491                 dump_line();
 492                 ps.want_blank = false;
 493             }
 494             ++line_no;          /* keep track of input line number */
 495             break;
 496
 497         case lparen:            /* got a '(' or '[' */
 498             ++ps.p_l_follow;    /* count parens to make Healy happy */
 499             if (ps.want_blank && *token != '[' &&
 500                     (ps.last_token != ident || proc_calls_space
 501               || (ps.its_a_keyword && (!ps.sizeof_keyword || Bill_Shannon))))
 502                 *e_code++ = ' ';
 503             if (ps.in_decl && !ps.block_init)
 504                 if (troff && !ps.dumped_decl_indent && !is_procname && ps.last_token == decl) {
 505                     ps.dumped_decl_indent = 1;
 506                     sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token);
 507                     e_code += strlen(e_code);
 508                 }
 509                 else {
 510                     while ((e_code - s_code) < dec_ind) {
 511                         CHECK_SIZE_CODE;
 512                         *e_code++ = ' ';
 513                     }
 514                     *e_code++ = token[0];
 515                 }
 516             else
 517                 *e_code++ = token[0];
 518             ps.paren_indents[ps.p_l_follow - 1] = e_code - s_code;
 519             if (sp_sw && ps.p_l_follow == 1 && extra_expression_indent
 520                     && ps.paren_indents[0] < 2 * ps.ind_size)
 521                 ps.paren_indents[0] = 2 * ps.ind_size;
 522             ps.want_blank = false;
 523             if (ps.in_or_st && *token == '(' && ps.tos <= 2) {
 524                 /*
 525                  * this is a kluge to make sure that declarations will be
 526                  * aligned right if proc decl has an explicit type on it, i.e.
 527                  * "int a(x) {..."
 528                  */
 529                 parse(semicolon);       /* I said this was a kluge... */
 530                 ps.in_or_st = false;    /* turn off flag for structure decl or
 531                                          * initialization */
 532             }
 533             if (ps.sizeof_keyword)
 534                 ps.sizeof_mask |= 1 << ps.p_l_follow;
 535             break;
 536
 537         case rparen:            /* got a ')' or ']' */
 538             rparen_count--;
 539             if (ps.cast_mask & (1 << ps.p_l_follow) & ~ps.sizeof_mask) {
 540                 ps.last_u_d = true;
 541                 ps.cast_mask &= (1 << ps.p_l_follow) - 1;
 542                 ps.want_blank = false;
 543             } else
 544                 ps.want_blank = true;
 545             ps.sizeof_mask &= (1 << ps.p_l_follow) - 1;
 546             if (--ps.p_l_follow < 0) {
 547                 ps.p_l_follow = 0;
 548                 diag3(0, "Extra %c", *token);
 549             }
 550             if (e_code == s_code)       /* if the paren starts the line */
 551                 ps.paren_level = ps.p_l_follow; /* then indent it */
 552
 553             *e_code++ = token[0];
 554
 555             if (sp_sw && (ps.p_l_follow == 0)) {        /* check for end of if
 556                                                          * (...), or some such */
 557                 sp_sw = false;
 558                 force_nl = true;/* must force newline after if */
 559                 ps.last_u_d = true;     /* inform lexi that a following
 560                                          * operator is unary */
 561                 ps.in_stmt = false;     /* dont use stmt continuation
 562                                          * indentation */
 563
 564                 parse(hd_type); /* let parser worry about if, or whatever */
 565             }
 566             ps.search_brace = btype_2;  /* this should insure that constructs
 567                                          * such as main(){...} and int[]{...}
 568                                          * have their braces put in the right
 569                                          * place */
 570             break;
 571
 572         case unary_op:          /* this could be any unary operation */
 573             if (ps.want_blank)
 574                 *e_code++ = ' ';
 575
 576             if (troff && !ps.dumped_decl_indent && ps.in_decl && !is_procname) {
 577                 sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token);
 578                 ps.dumped_decl_indent = 1;
 579                 e_code += strlen(e_code);
 580             }
 581             else {
 582                 const char *res = token;
 583
 584                 if (ps.in_decl && !ps.block_init) {     /* if this is a unary op
 585                                                          * in a declaration, we
 586                                                          * should indent this
 587                                                          * token */
 588                     for (i = 0; token[i]; ++i); /* find length of token */
 589                     while ((e_code - s_code) < (dec_ind - i)) {
 590                         CHECK_SIZE_CODE;
 591                         *e_code++ = ' ';        /* pad it */
 592                     }
 593                 }
 594                 if (troff && token[0] == '-' && token[1] == '>')
 595                     res = "\\(->";
 596                 for (t_ptr = res; *t_ptr; ++t_ptr) {
 597                     CHECK_SIZE_CODE;
 598                     *e_code++ = *t_ptr;
 599                 }
 600             }
 601             ps.want_blank = false;
 602             break;
 603
 604         case binary_op: /* any binary operation */
 605             if (ps.want_blank)
 606                 *e_code++ = ' ';
 607             {
 608                 const char *res = token;
 609
 610                 if (troff)
 611                     switch (token[0]) {
 612                     case '<':
 613                         if (token[1] == '=')
 614                             res = "\\(<=";
 615                         break;
 616                     case '>':
 617                         if (token[1] == '=')
 618                             res = "\\(>=";
 619                         break;
 620                     case '!':
 621                         if (token[1] == '=')
 622                             res = "\\(!=";
 623                         break;
 624                     case '|':
 625                         if (token[1] == '|')
 626                             res = "\\(br\\(br";
 627                         else if (token[1] == 0)
 628                             res = "\\(br";
 629                         break;
 630                     }
 631                 for (t_ptr = res; *t_ptr; ++t_ptr) {
 632                     CHECK_SIZE_CODE;
 633                     *e_code++ = *t_ptr; /* move the operator */
 634                 }
 635             }
 636             ps.want_blank = true;
 637             break;
 638
 639         case postop:            /* got a trailing ++ or -- */
 640             *e_code++ = token[0];
 641             *e_code++ = token[1];
 642             ps.want_blank = true;
 643             break;
 644
 645         case question:          /* got a ? */
 646             squest++;           /* this will be used when a later colon
 647                                  * appears so we can distinguish the
 648                                  * <c>?<n>:<n> construct */
 649             if (ps.want_blank)
 650                 *e_code++ = ' ';
 651             *e_code++ = '?';
 652             ps.want_blank = true;
 653             break;
 654
 655         case casestmt:          /* got word 'case' or 'default' */
 656             scase = true;       /* so we can process the later colon properly */
 657             goto copy_id;
 658
 659         case colon:             /* got a ':' */
 660             if (squest > 0) {   /* it is part of the <c>?<n>: <n> construct */
 661                 --squest;
 662                 if (ps.want_blank)
 663                     *e_code++ = ' ';
 664                 *e_code++ = ':';
 665                 ps.want_blank = true;
 666                 break;
 667             }
 668             if (ps.in_decl) {
 669                 *e_code++ = ':';
 670                 ps.want_blank = false;
 671                 break;
 672             }
 673             ps.in_stmt = false; /* seeing a label does not imply we are in a
 674                                  * stmt */
 675             for (t_ptr = s_code; *t_ptr; ++t_ptr)
 676                 *e_lab++ = *t_ptr;      /* turn everything so far into a label */
 677             e_code = s_code;
 678             *e_lab++ = ':';
 679             *e_lab++ = ' ';
 680             *e_lab = '\0';
 681
 682             force_nl = ps.pcase = scase;        /* ps.pcase will be used by
 683                                                  * dump_line to decide how to
 684                                                  * indent the label. force_nl
 685                                                  * will force a case n: to be
 686                                                  * on a line by itself */
 687             scase = false;
 688             ps.want_blank = false;
 689             break;
 690
 691         case semicolon: /* got a ';' */
 692             ps.in_or_st = false;/* we are not in an initialization or
 693                                  * structure declaration */
 694             scase = false;      /* these will only need resetting in an error */
 695             squest = 0;
 696             if (ps.last_token == rparen && rparen_count == 0)
 697                 ps.in_parameter_declaration = 0;
 698             ps.cast_mask = 0;
 699             ps.sizeof_mask = 0;
 700             ps.block_init = 0;
 701             ps.block_init_level = 0;
 702             ps.just_saw_decl--;
 703
 704             if (ps.in_decl && s_code == e_code && !ps.block_init)
 705                 while ((e_code - s_code) < (dec_ind - 1)) {
 706                     CHECK_SIZE_CODE;
 707                     *e_code++ = ' ';
 708                 }
 709
 710             ps.in_decl = (ps.dec_nest > 0);     /* if we were in a first level
 711                                                  * structure declaration, we
 712                                                  * arent any more */
 713
 714             if ((!sp_sw || hd_type != forstmt) && ps.p_l_follow > 0) {
 715
 716                 /*
 717                  * This should be true iff there were unbalanced parens in the
 718                  * stmt.  It is a bit complicated, because the semicolon might
 719                  * be in a for stmt
 720                  */
 721                 diag2(1, "Unbalanced parens");
 722                 ps.p_l_follow = 0;
 723                 if (sp_sw) {    /* this is a check for an if, while, etc. with
 724                                  * unbalanced parens */
 725                     sp_sw = false;
 726                     parse(hd_type);     /* dont lose the if, or whatever */
 727                 }
 728             }
 729             *e_code++ = ';';
 730             ps.want_blank = true;
 731             ps.in_stmt = (ps.p_l_follow > 0);   /* we are no longer in the
 732                                                  * middle of a stmt */
 733
 734             if (!sp_sw) {       /* if not if for (;;) */
 735                 parse(semicolon);       /* let parser know about end of stmt */
 736                 force_nl = true;/* force newline after an end of stmt */
 737             }
 738             break;
 739
 740         case lbrace:            /* got a '{' */
 741             ps.in_stmt = false; /* dont indent the {} */
 742             if (!ps.block_init)
 743                 force_nl = true;/* force other stuff on same line as '{' onto
 744                                  * new line */
 745             else if (ps.block_init_level <= 0)
 746                 ps.block_init_level = 1;
 747             else
 748                 ps.block_init_level++;
 749
 750             if (s_code != e_code && !ps.block_init) {
 751                 if (!btype_2) {
 752                     dump_line();
 753                     ps.want_blank = false;
 754                 }
 755                 else if (ps.in_parameter_declaration && !ps.in_or_st) {
 756                     ps.i_l_follow = 0;
 757                     if (function_brace_split) { /* dump the line prior to the
 758                                                  * brace ... */
 759                     dump_line();
 760                     ps.want_blank = false;
 761                     } else      /* add a space between the decl and brace */
 762                         ps.want_blank = true;
 763                 }
 764             }
 765             if (ps.in_parameter_declaration)
 766                 prefix_blankline_requested = 0;
 767
 768             if (ps.p_l_follow > 0) {    /* check for preceding unbalanced
 769                                          * parens */
 770                 diag2(1, "Unbalanced parens");
 771                 ps.p_l_follow = 0;
 772                 if (sp_sw) {    /* check for unclosed if, for, etc. */
 773                     sp_sw = false;
 774                     parse(hd_type);
 775                     ps.ind_level = ps.i_l_follow;
 776                 }
 777             }
 778             if (s_code == e_code)
 779                 ps.ind_stmt = false;    /* dont put extra indentation on line
 780                                          * with '{' */
 781             if (ps.in_decl && ps.in_or_st) {    /* this is either a structure
 782                                                  * declaration or an init */
 783                 di_stack[ps.dec_nest++] = dec_ind;
 784                 /* ?            dec_ind = 0; */
 785             }
 786             else {
 787                 ps.decl_on_line = false;        /* we cant be in the middle of
 788                                                  * a declaration, so dont do
 789                                                  * special indentation of
 790                                                  * comments */
 791                 if (blanklines_after_declarations_at_proctop
 792                         && ps.in_parameter_declaration)
 793                     postfix_blankline_requested = 1;
 794                 ps.in_parameter_declaration = 0;
 795             }
 796             dec_ind = 0;
 797             parse(lbrace);      /* let parser know about this */
 798             if (ps.want_blank)  /* put a blank before '{' if '{' is not at
 799                                  * start of line */
 800                 *e_code++ = ' ';
 801             ps.want_blank = false;
 802             *e_code++ = '{';
 803             ps.just_saw_decl = 0;
 804             break;
 805
 806         case rbrace:            /* got a '}' */
 807             if (ps.p_stack[ps.tos] == decl && !ps.block_init)   /* semicolons can be
 808                                                                  * omitted in
 809                                                                  * declarations */
 810                 parse(semicolon);
 811             if (ps.p_l_follow) {/* check for unclosed if, for, else. */
 812                 diag2(1, "Unbalanced parens");
 813                 ps.p_l_follow = 0;
 814                 sp_sw = false;
 815             }
 816             ps.just_saw_decl = 0;
 817             ps.block_init_level--;
 818             if (s_code != e_code && !ps.block_init) {   /* '}' must be first on
 819                                                          * line */
 820                 if (verbose)
 821                     diag2(0, "Line broken");
 822                 dump_line();
 823             }
 824             *e_code++ = '}';
 825             ps.want_blank = true;
 826             ps.in_stmt = ps.ind_stmt = false;
 827             if (ps.dec_nest > 0) {      /* we are in multi-level structure
 828                                          * declaration */
 829                 dec_ind = di_stack[--ps.dec_nest];
 830                 if (ps.dec_nest == 0 && !ps.in_parameter_declaration)
 831                     ps.just_saw_decl = 2;
 832                 ps.in_decl = true;
 833             }
 834             prefix_blankline_requested = 0;
 835             parse(rbrace);      /* let parser know about this */
 836             ps.search_brace = cuddle_else && ps.p_stack[ps.tos] == ifhead
 837                 && ps.il[ps.tos] >= ps.ind_level;
 838             if (ps.tos <= 1 && blanklines_after_procs && ps.dec_nest <= 0)
 839                 postfix_blankline_requested = 1;
 840             break;
 841
 842         case swstmt:            /* got keyword "switch" */
 843             sp_sw = true;
 844             hd_type = swstmt;   /* keep this for when we have seen the
 845                                  * expression */
 846             goto copy_id;       /* go move the token into buffer */
 847
 848         case sp_paren:          /* token is if, while, for */
 849             sp_sw = true;       /* the interesting stuff is done after the
 850                                  * expression is scanned */
 851             hd_type = (*token == 'i' ? ifstmt :
 852                        (*token == 'w' ? whilestmt : forstmt));
 853
 854             /*
 855              * remember the type of header for later use by parser
 856              */
 857             goto copy_id;       /* copy the token into line */
 858
 859         case sp_nparen: /* got else, do */
 860             ps.in_stmt = false;
 861             if (*token == 'e') {
 862                 if (e_code != s_code && (!cuddle_else || e_code[-1] != '}')) {
 863                     if (verbose)
 864                         diag2(0, "Line broken");
 865                     dump_line();/* make sure this starts a line */
 866                     ps.want_blank = false;
 867                 }
 868                 force_nl = true;/* also, following stuff must go onto new line */
 869                 last_else = 1;
 870                 parse(elselit);
 871             }
 872             else {
 873                 if (e_code != s_code) { /* make sure this starts a line */
 874                     if (verbose)
 875                         diag2(0, "Line broken");
 876                     dump_line();
 877                     ps.want_blank = false;
 878                 }
 879                 force_nl = true;/* also, following stuff must go onto new line */
 880                 last_else = 0;
 881                 parse(dolit);
 882             }
 883             goto copy_id;       /* move the token into line */
 884
 885         case decl:              /* we have a declaration type (int, register,
 886                                  * etc.) */
 887             parse(decl);        /* let parser worry about indentation */
 888             if (ps.last_token == rparen && ps.tos <= 1) {
 889                 ps.in_parameter_declaration = 1;
 890                 if (s_code != e_code) {
 891                     dump_line();
 892                     ps.want_blank = 0;
 893                 }
 894             }
 895             if (ps.in_parameter_declaration && ps.indent_parameters && ps.dec_nest == 0) {
 896                 ps.ind_level = ps.i_l_follow = 1;
 897                 ps.ind_stmt = 0;
 898             }
 899             ps.in_or_st = true; /* this might be a structure or initialization
 900                                  * declaration */
 901             ps.in_decl = ps.decl_on_line = true;
 902             if ( /* !ps.in_or_st && */ ps.dec_nest <= 0)
 903                 ps.just_saw_decl = 2;
 904             prefix_blankline_requested = 0;
 905             for (i = 0; token[i++];);   /* get length of token */
 906
 907             if (ps.ind_level == 0 || ps.dec_nest > 0) {
 908                 /* global variable or struct member in local variable */
 909             dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i;
 910                 tabs_to_var = (use_tabs ? ps.decl_indent > 0 : 0);
 911             } else {
 912                 /* local variable */
 913                 dec_ind = ps.local_decl_indent > 0 ? ps.local_decl_indent : i;
 914                 tabs_to_var = (use_tabs ? ps.local_decl_indent > 0 : 0);
 915             }
 916             goto copy_id;
 917
 918         case ident:             /* got an identifier or constant */
 919             if (ps.in_decl) {   /* if we are in a declaration, we must indent
 920                                  * identifier */
 921                 if (is_procname == 0 || !procnames_start_line) {
 922                     if (!ps.block_init) {
 923                         if (troff && !ps.dumped_decl_indent) {
 924                             if (ps.want_blank)
 925                                 *e_code++ = ' ';
 926                             ps.want_blank = false;
 927                             sprintf(e_code, "\n.De %dp+\200p\n", dec_ind * 7);
 928                             ps.dumped_decl_indent = 1;
 929                             e_code += strlen(e_code);
 930                         } else {
 931                             int cur_dec_ind;
 932                             int pos, startpos;
 933
 934                             /*
 935                              * in order to get the tab math right for
 936                              * indentations that are not multiples of 8 we
 937                              * need to modify both startpos and dec_ind
 938                              * (cur_dec_ind) here by eight minus the
 939                              * remainder of the current starting column
 940                              * divided by eight. This seems to be a
 941                              * properly working fix
 942                              */
 943                             startpos = e_code - s_code;
 944                             cur_dec_ind = dec_ind;
 945                             pos = startpos;
 946                             if ((ps.ind_level * ps.ind_size) % 8 != 0) {
 947                                 pos += (ps.ind_level * ps.ind_size) % 8;
 948                                 cur_dec_ind += (ps.ind_level * ps.ind_size) % 8;
 949                             }
 950
 951                             if (tabs_to_var) {
 952                                 while ((pos & ~7) + 8 <= cur_dec_ind) {
 953                                     CHECK_SIZE_CODE;
 954                                     *e_code++ = '\t';
 955                                     pos = (pos & ~7) + 8;
 956                                 }
 957                             }
 958                             while (pos < cur_dec_ind) {
 959                                 CHECK_SIZE_CODE;
 960                                 *e_code++ = ' ';
 961                                 pos++;
 962                             }
 963                             if (ps.want_blank && e_code - s_code == startpos)
 964                                 *e_code++ = ' ';
 965                             ps.want_blank = false;
 966                         }
 967                     }
 968                 } else {
 969                     if (ps.want_blank)
 970                         *e_code++ = ' ';
 971                     ps.want_blank = false;
 972                     if (dec_ind && s_code != e_code)
 973                         dump_line();
 974                     dec_ind = 0;
 975                 }
 976             }
 977             else if (sp_sw && ps.p_l_follow == 0) {
 978                 sp_sw = false;
 979                 force_nl = true;
 980                 ps.last_u_d = true;
 981                 ps.in_stmt = false;
 982                 parse(hd_type);
 983             }
 984     copy_id:
 985             if (ps.want_blank)
 986                 *e_code++ = ' ';
 987             if (troff && ps.its_a_keyword) {
 988                 e_code = chfont(&bodyf, &keywordf, e_code);
 989                 for (t_ptr = token; *t_ptr; ++t_ptr) {
 990                     CHECK_SIZE_CODE;
 991                     *e_code++ = keywordf.allcaps && islower(*t_ptr)
 992                         ? toupper(*t_ptr) : *t_ptr;
 993                 }
 994                 e_code = chfont(&keywordf, &bodyf, e_code);
 995             }
 996             else
 997                 for (t_ptr = token; *t_ptr; ++t_ptr) {
 998                     CHECK_SIZE_CODE;
 999                     *e_code++ = *t_ptr;
1000                 }
1001             ps.want_blank = true;
1002             break;
1003
1004         case period:            /* treat a period kind of like a binary
1005                                  * operation */
1006             *e_code++ = '.';    /* move the period into line */
1007             ps.want_blank = false;      /* dont put a blank after a period */
1008             break;
1009
1010         case comma:
1011             ps.want_blank = (s_code != e_code); /* only put blank after comma
1012                                                  * if comma does not start the
1013                                                  * line */
1014             if (ps.in_decl && is_procname == 0 && !ps.block_init)
1015                 while ((e_code - s_code) < (dec_ind - 1)) {
1016                     CHECK_SIZE_CODE;
1017                     *e_code++ = ' ';
1018                 }
1019
1020             *e_code++ = ',';
1021             if (ps.p_l_follow == 0) {
1022                 if (ps.block_init_level <= 0)
1023                     ps.block_init = 0;
1024                 if (break_comma && (!ps.leave_comma || compute_code_target() + (e_code - s_code) > max_col - 8))
1025                     force_nl = true;
1026             }
1027             break;
1028
1029         case preesc:            /* got the character '#' */
1030             if ((s_com != e_com) ||
1031                     (s_lab != e_lab) ||
1032                     (s_code != e_code))
1033                 dump_line();
1034             *e_lab++ = '#';     /* move whole line to 'label' buffer */
1035             {
1036                 int         in_comment = 0;
1037                 int         com_start = 0;
1038                 char        quote = 0;
1039                 int         com_end = 0;
1040
1041                 while (*buf_ptr == ' ' || *buf_ptr == '\t') {
1042                     buf_ptr++;
1043                     if (buf_ptr >= buf_end)
1044                         fill_buffer();
1045                 }
1046                 while (*buf_ptr != '\n' || (in_comment && !had_eof)) {
1047                     CHECK_SIZE_LAB;
1048                     *e_lab = *buf_ptr++;
1049                     if (buf_ptr >= buf_end)
1050                         fill_buffer();
1051                     switch (*e_lab++) {
1052                     case BACKSLASH:
1053                         if (troff)
1054                             *e_lab++ = BACKSLASH;
1055                         if (!in_comment) {
1056                             *e_lab++ = *buf_ptr++;
1057                             if (buf_ptr >= buf_end)
1058                                 fill_buffer();
1059                         }
1060                         break;
1061                     case '/':
1062                         if (*buf_ptr == '*' && !in_comment && !quote) {
1063                             in_comment = 1;
1064                             *e_lab++ = *buf_ptr++;
1065                             com_start = e_lab - s_lab - 2;
1066                         }
1067                         break;
1068                     case '"':
1069                         if (quote == '"')
1070                             quote = 0;
1071                         break;
1072                     case '\'':
1073                         if (quote == '\'')
1074                             quote = 0;
1075                         break;
1076                     case '*':
1077                         if (*buf_ptr == '/' && in_comment) {
1078                             in_comment = 0;
1079                             *e_lab++ = *buf_ptr++;
1080                             com_end = e_lab - s_lab;
1081                         }
1082                         break;
1083                     }
1084                 }
1085
1086                 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
1087                     e_lab--;
1088                 if (e_lab - s_lab == com_end && bp_save == 0) { /* comment on
1089                                                                  * preprocessor line */
1090                     if (sc_end == 0)    /* if this is the first comment, we
1091                                          * must set up the buffer */
1092                         sc_end = &(save_com[0]);
1093                     else {
1094                         *sc_end++ = '\n';       /* add newline between
1095                                                  * comments */
1096                         *sc_end++ = ' ';
1097                         --line_no;
1098                     }
1099                     bcopy(s_lab + com_start, sc_end, com_end - com_start);
1100                     sc_end += com_end - com_start;
1101                     if (sc_end >= &save_com[sc_size])
1102                         abort();
1103                     e_lab = s_lab + com_start;
1104                     while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
1105                         e_lab--;
1106                     bp_save = buf_ptr;  /* save current input buffer */
1107                     be_save = buf_end;
1108                     buf_ptr = save_com; /* fix so that subsequent calls to
1109                                          * lexi will take tokens out of
1110                                          * save_com */
1111                     *sc_end++ = ' ';    /* add trailing blank, just in case */
1112                     buf_end = sc_end;
1113                     sc_end = 0;
1114                 }
1115                 *e_lab = '\0';  /* null terminate line */
1116                 ps.pcase = false;
1117             }
1118
1119             if (strncmp(s_lab, "#if", 3) == 0) {
1120                 if (blanklines_around_conditional_compilation) {
1121                     int c;
1122                     prefix_blankline_requested++;
1123                     while ((c = getc(input)) == '\n');
1124                     ungetc(c, input);
1125                 }
1126                 if ((size_t)ifdef_level < sizeof(state_stack)/sizeof(state_stack[0])) {
1127                     match_state[ifdef_level].tos = -1;
1128                     state_stack[ifdef_level++] = ps;
1129                 }
1130                 else
1131                     diag2(1, "#if stack overflow");
1132             }
1133             else if (strncmp(s_lab, "#else", 5) == 0)
1134                 if (ifdef_level <= 0)
1135                     diag2(1, "Unmatched #else");
1136                 else {
1137                     match_state[ifdef_level - 1] = ps;
1138                     ps = state_stack[ifdef_level - 1];
1139                 }
1140             else if (strncmp(s_lab, "#endif", 6) == 0) {
1141                 if (ifdef_level <= 0)
1142                     diag2(1, "Unmatched #endif");
1143                 else {
1144                     ifdef_level--;
1145
1146 #ifdef undef
1147                     /*
1148                      * This match needs to be more intelligent before the
1149                      * message is useful
1150                      */
1151                     if (match_state[ifdef_level].tos >= 0
1152                           && bcmp(&ps, &match_state[ifdef_level], sizeof ps))
1153                         diag2(0, "Syntactically inconsistent #ifdef alternatives");
1154 #endif
1155                 }
1156                 if (blanklines_around_conditional_compilation) {
1157                     postfix_blankline_requested++;
1158                     n_real_blanklines = 0;
1159                 }
1160             }
1161             break;              /* subsequent processing of the newline
1162                                  * character will cause the line to be printed */
1163
1164         case comment:           /* we have gotten a / followed by * this is a biggie */
1165             if (flushed_nl) {   /* we should force a broken line here */
1166                 flushed_nl = false;
1167                 dump_line();
1168                 ps.want_blank = false;  /* dont insert blank at line start */
1169                 force_nl = false;
1170             }
1171             pr_comment();
1172             break;
1173         }                       /* end of big switch stmt */
1174
1175         *e_code = '\0';         /* make sure code section is null terminated */
1176         if (type_code != comment && type_code != newline && type_code != preesc)
1177             ps.last_token = type_code;
1178     }                           /* end of main while (1) loop */
1179 }
1180
1181 /*
1182  * copy input file to backup file if in_name is /blah/blah/blah/file, then
1183  * backup file will be ".Bfile" then make the backup file the input and
1184  * original input file the output
1185  */
1186 static void
1187 bakcopy(void)
1188 {
1189     int         n,
1190                 bakchn;
1191     char        buff[8 * 1024];
1192     const char *p;
1193
1194     /* construct file name .Bfile */
1195     for (p = in_name; *p; p++); /* skip to end of string */
1196     while (p > in_name && *p != '/')    /* find last '/' */
1197         p--;
1198     if (*p == '/')
1199         p++;
1200     sprintf(bakfile, "%s.BAK", p);
1201
1202     /* copy in_name to backup file */
1203     bakchn = creat(bakfile, 0600);
1204     if (bakchn < 0)
1205         err(1, "%s", bakfile);
1206     while ((n = read(fileno(input), buff, sizeof buff)) != 0)
1207         if (write(bakchn, buff, n) != n)
1208             err(1, "%s", bakfile);
1209     if (n < 0)
1210         err(1, "%s", in_name);
1211     close(bakchn);
1212     fclose(input);
1213
1214     /* re-open backup file as the input file */
1215     input = fopen(bakfile, "r");
1216     if (input == 0)
1217         err(1, "%s", bakfile);
1218     /* now the original input file will be the output */
1219     output = fopen(in_name, "w");
1220     if (output == 0) {
1221         unlink(bakfile);
1222         err(1, "%s", in_name);
1223     }
1224 }