1 /* $OpenBSD: indent.c,v 1.20 2009/10/27 23:59:39 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. 6 * Copyright (c) 1976 Board of Trustees of the University of Illinois. 7 * Copyright (c) 1985 Sun Microsystems, Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/param.h> 36 #include <fcntl.h> 37 #include <unistd.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include "indent_globs.h" 42 #include "indent_codes.h" 43 #include <ctype.h> 44 #include <errno.h> 45 #include <err.h> 46 47 char *in_name = "Standard Input"; /* will always point to name of input 48 * file */ 49 char *out_name = "Standard Output"; /* will always point to name 50 * of output file */ 51 char bakfile[MAXPATHLEN] = ""; 52 53 void bakcopy(void); 54 55 int 56 main(int argc, char **argv) 57 { 58 59 extern int found_err; /* flag set in diag() on error */ 60 int dec_ind; /* current indentation for declarations */ 61 int di_stack[20]; /* a stack of structure indentation levels */ 62 int flushed_nl; /* used when buffering up comments to remember 63 * that a newline was passed over */ 64 int force_nl; /* when true, code must be broken */ 65 int hd_type; /* used to store type of stmt for if (...), 66 * for (...), etc */ 67 int i; /* local loop counter */ 68 int scase; /* set to true when we see a case, so we will 69 * know what to do with the following colon */ 70 int sp_sw; /* when true, we are in the expressin of 71 * if(...), while(...), etc. */ 72 int squest; /* when this is positive, we have seen a ? 73 * without the matching : in a <c>?<s>:<s> 74 * construct */ 75 char *t_ptr; /* used for copying tokens */ 76 int type_code; /* the type of token, returned by lexi */ 77 78 int last_else = 0; /* true iff last keyword was an else */ 79 80 81 /*-----------------------------------------------*\ 82 | INITIALIZATION | 83 \*-----------------------------------------------*/ 84 85 86 hd_type = 0; 87 ps.p_stack[0] = stmt; /* this is the parser's stack */ 88 ps.last_nl = true; /* this is true if the last thing scanned was 89 * a newline */ 90 ps.last_token = semicolon; 91 combuf = (char *) malloc(bufsize); 92 labbuf = (char *) malloc(bufsize); 93 codebuf = (char *) malloc(bufsize); 94 tokenbuf = (char *) malloc(bufsize); 95 if (combuf == NULL || labbuf == NULL || codebuf == NULL || 96 tokenbuf == NULL) 97 err(1, NULL); 98 l_com = combuf + bufsize - 5; 99 l_lab = labbuf + bufsize - 5; 100 l_code = codebuf + bufsize - 5; 101 l_token = tokenbuf + bufsize - 5; 102 combuf[0] = codebuf[0] = labbuf[0] = ' '; /* set up code, label, and 103 * comment buffers */ 104 combuf[1] = codebuf[1] = labbuf[1] = '\0'; 105 ps.else_if = 1; /* Default else-if special processing to on */ 106 s_lab = e_lab = labbuf + 1; 107 s_code = e_code = codebuf + 1; 108 s_com = e_com = combuf + 1; 109 s_token = e_token = tokenbuf + 1; 110 111 in_buffer = (char *) malloc(10); 112 if (in_buffer == NULL) 113 err(1, NULL); 114 in_buffer_limit = in_buffer + 8; 115 buf_ptr = buf_end = in_buffer; 116 line_no = 1; 117 had_eof = ps.in_decl = ps.decl_on_line = break_comma = false; 118 sp_sw = force_nl = false; 119 ps.in_or_st = false; 120 ps.bl_line = true; 121 dec_ind = 0; 122 di_stack[ps.dec_nest = 0] = 0; 123 ps.want_blank = ps.in_stmt = ps.ind_stmt = false; 124 125 126 scase = ps.pcase = false; 127 squest = 0; 128 sc_end = 0; 129 bp_save = 0; 130 be_save = 0; 131 132 output = 0; 133 134 135 136 /*--------------------------------------------------*\ 137 | COMMAND LINE SCAN | 138 \*--------------------------------------------------*/ 139 140 #ifdef undef 141 max_col = 78; /* -l78 */ 142 lineup_to_parens = 1; /* -lp */ 143 ps.ljust_decl = 0; /* -ndj */ 144 ps.com_ind = 33; /* -c33 */ 145 star_comment_cont = 1; /* -sc */ 146 ps.ind_size = 8; /* -i8 */ 147 verbose = 0; 148 ps.decl_indent = 16; /* -di16 */ 149 ps.indent_parameters = 1; /* -ip */ 150 ps.decl_com_ind = 0; /* if this is not set to some positive value 151 * by an arg, we will set this equal to 152 * ps.com_ind */ 153 btype_2 = 1; /* -br */ 154 cuddle_else = 1; /* -ce */ 155 ps.unindent_displace = 0; /* -d0 */ 156 ps.case_indent = 0; /* -cli0 */ 157 format_col1_comments = 1; /* -fc1 */ 158 procnames_start_line = 1; /* -psl */ 159 proc_calls_space = 0; /* -npcs */ 160 comment_delimiter_on_blankline = 1; /* -cdb */ 161 ps.leave_comma = 1; /* -nbc */ 162 #endif 163 164 for (i = 1; i < argc; ++i) 165 if (strcmp(argv[i], "-npro") == 0) 166 break; 167 set_defaults(); 168 if (i >= argc) 169 set_profile(); 170 171 for (i = 1; i < argc; ++i) { 172 173 /* 174 * look thru args (if any) for changes to defaults 175 */ 176 if (argv[i][0] != '-') {/* no flag on parameter */ 177 if (input == 0) { /* we must have the input file */ 178 in_name = argv[i]; /* remember name of input file */ 179 input = fopen(in_name, "r"); 180 if (input == NULL) /* check for open error */ 181 err(1, "%s", in_name); 182 continue; 183 } 184 else if (output == 0) { /* we have the output file */ 185 out_name = argv[i]; /* remember name of output file */ 186 if (strcmp(in_name, out_name) == 0) /* attempt to overwrite 187 * the file */ 188 errx(1, "input and output files must be different"); 189 output = fopen(out_name, "w"); 190 if (output == NULL) /* check for create error */ 191 err(1, "%s", out_name); 192 continue; 193 } 194 errx(1, "unknown parameter: %s", argv[i]); 195 } 196 else 197 set_option(argv[i]); 198 } /* end of for */ 199 if (input == NULL) { 200 fprintf(stderr, "usage: indent input-file [output-file] [options]\n"); 201 exit(1); 202 } 203 if (output == NULL) { 204 if (troff) 205 output = stdout; 206 else { 207 out_name = in_name; 208 bakcopy(); 209 } 210 } 211 if (ps.com_ind <= 1) 212 ps.com_ind = 2; /* dont put normal comments before column 2 */ 213 if (troff) { 214 if (bodyf.font[0] == 0) 215 parsefont(&bodyf, "R"); 216 if (scomf.font[0] == 0) 217 parsefont(&scomf, "I"); 218 if (blkcomf.font[0] == 0) 219 blkcomf = scomf, blkcomf.size += 2; 220 if (boxcomf.font[0] == 0) 221 boxcomf = blkcomf; 222 if (stringf.font[0] == 0) 223 parsefont(&stringf, "L"); 224 if (keywordf.font[0] == 0) 225 parsefont(&keywordf, "B"); 226 writefdef(&bodyf, 'B'); 227 writefdef(&scomf, 'C'); 228 writefdef(&blkcomf, 'L'); 229 writefdef(&boxcomf, 'X'); 230 writefdef(&stringf, 'S'); 231 writefdef(&keywordf, 'K'); 232 } 233 if (block_comment_max_col <= 0) 234 block_comment_max_col = max_col; 235 if (ps.decl_com_ind <= 0) /* if not specified by user, set this */ 236 ps.decl_com_ind = ps.ljust_decl ? (ps.com_ind <= 10 ? 2 : ps.com_ind - 8) : ps.com_ind; 237 if (continuation_indent == 0) 238 continuation_indent = ps.ind_size; 239 fill_buffer(); /* get first batch of stuff into input buffer */ 240 241 parse(semicolon); 242 { 243 char *p = buf_ptr; 244 int col = 1; 245 246 while (1) { 247 if (*p == ' ') 248 col++; 249 else if (*p == '\t') 250 col = ((col - 1) & ~7) + 9; 251 else 252 break; 253 p++; 254 } 255 if (col > ps.ind_size) 256 ps.ind_level = ps.i_l_follow = col / ps.ind_size; 257 } 258 if (troff) { 259 char *p = in_name, 260 *beg = in_name; 261 262 while (*p) 263 if (*p++ == '/') 264 beg = p; 265 fprintf(output, ".Fn \"%s\"\n", beg); 266 } 267 /* 268 * START OF MAIN LOOP 269 */ 270 271 while (1) { /* this is the main loop. it will go until we 272 * reach eof */ 273 int is_procname; 274 275 type_code = lexi(); /* lexi reads one token. The actual 276 * characters read are stored in "token". lexi 277 * returns a code indicating the type of token */ 278 is_procname = ps.procname[0]; 279 280 /* 281 * The following code moves everything following an if (), while (), 282 * else, etc. up to the start of the following stmt to a buffer. This 283 * allows proper handling of both kinds of brace placement. 284 */ 285 286 flushed_nl = false; 287 while (ps.search_brace) { /* if we scanned an if(), while(), 288 * etc., we might need to copy stuff 289 * into a buffer we must loop, copying 290 * stuff into save_com, until we find 291 * the start of the stmt which follows 292 * the if, or whatever */ 293 switch (type_code) { 294 case newline: 295 ++line_no; 296 flushed_nl = true; 297 case form_feed: 298 break; /* form feeds and newlines found here will be 299 * ignored */ 300 301 case lbrace: /* this is a brace that starts the compound 302 * stmt */ 303 if (sc_end == 0) { /* ignore buffering if a comment wasnt 304 * stored up */ 305 ps.search_brace = false; 306 goto check_type; 307 } 308 if (btype_2) { 309 save_com[0] = '{'; /* we either want to put the brace 310 * right after the if */ 311 goto sw_buffer; /* go to common code to get out of 312 * this loop */ 313 } 314 case comment: /* we have a comment, so we must copy it into 315 * the buffer */ 316 if (!flushed_nl || sc_end != 0) { 317 if (sc_end == 0) { /* if this is the first comment, we 318 * must set up the buffer */ 319 save_com[0] = save_com[1] = ' '; 320 sc_end = &(save_com[2]); 321 } 322 else { 323 *sc_end++ = '\n'; /* add newline between 324 * comments */ 325 *sc_end++ = ' '; 326 --line_no; 327 } 328 *sc_end++ = '/'; /* copy in start of comment */ 329 *sc_end++ = '*'; 330 331 for (;;) { /* loop until we get to the end of the comment */ 332 *sc_end = *buf_ptr++; 333 if (buf_ptr >= buf_end) 334 fill_buffer(); 335 336 if (*sc_end++ == '*' && *buf_ptr == '/') 337 break; /* we are at end of comment */ 338 339 if (sc_end >= &(save_com[sc_size])) { /* check for temp buffer 340 * overflow */ 341 diag(1, "Internal buffer overflow - Move big comment from right after if, while, or whatever."); 342 fflush(output); 343 exit(1); 344 } 345 } 346 *sc_end++ = '/'; /* add ending slash */ 347 if (++buf_ptr >= buf_end) /* get past / in buffer */ 348 fill_buffer(); 349 break; 350 } 351 default: /* it is the start of a normal statment */ 352 if (flushed_nl) /* if we flushed a newline, make sure it is 353 * put back */ 354 force_nl = true; 355 if ((type_code == sp_paren && *token == 'i' 356 && last_else && ps.else_if) || 357 (type_code == sp_nparen && *token == 'e' 358 && e_code != s_code && e_code[-1] == '}')) 359 force_nl = false; 360 361 if (sc_end == 0) { /* ignore buffering if comment wasnt 362 * saved up */ 363 ps.search_brace = false; 364 goto check_type; 365 } 366 if (force_nl) { /* if we should insert a nl here, put it into 367 * the buffer */ 368 force_nl = false; 369 --line_no; /* this will be re-increased when the nl is 370 * read from the buffer */ 371 *sc_end++ = '\n'; 372 *sc_end++ = ' '; 373 if (verbose && !flushed_nl) /* print error msg if the line 374 * was not already broken */ 375 diag(0, "Line broken"); 376 flushed_nl = false; 377 } 378 for (t_ptr = token; *t_ptr; ++t_ptr) 379 *sc_end++ = *t_ptr; /* copy token into temp buffer */ 380 ps.procname[0] = 0; 381 382 sw_buffer: 383 ps.search_brace = false; /* stop looking for start of 384 * stmt */ 385 bp_save = buf_ptr; /* save current input buffer */ 386 be_save = buf_end; 387 buf_ptr = save_com; /* fix so that subsequent calls to 388 * lexi will take tokens out of 389 * save_com */ 390 *sc_end++ = ' ';/* add trailing blank, just in case */ 391 buf_end = sc_end; 392 sc_end = 0; 393 break; 394 } /* end of switch */ 395 if (type_code != 0) /* we must make this check, just in case there 396 * was an unexpected EOF */ 397 type_code = lexi(); /* read another token */ 398 /* if (ps.search_brace) ps.procname[0] = 0; */ 399 if ((is_procname = ps.procname[0]) && flushed_nl 400 && !procnames_start_line && ps.in_decl 401 && type_code == ident) 402 flushed_nl = 0; 403 } /* end of while (search_brace) */ 404 last_else = 0; 405 check_type: 406 if (type_code == 0) { /* we got eof */ 407 if (s_lab != e_lab || s_code != e_code 408 || s_com != e_com) /* must dump end of line */ 409 dump_line(); 410 if (ps.tos > 1) /* check for balanced braces */ 411 diag(1, "Missing braces at end of file."); 412 413 if (verbose) { 414 printf("There were %d output lines and %d comments\n", 415 ps.out_lines, ps.out_coms); 416 printf("(Lines with comments)/(Lines with code): %6.3f\n", 417 (1.0 * ps.com_lines) / code_lines); 418 } 419 fflush(output); 420 exit(found_err); 421 } 422 if ( 423 (type_code != comment) && 424 (type_code != newline) && 425 (type_code != preesc) && 426 (type_code != form_feed)) { 427 if (force_nl && 428 (type_code != semicolon) && 429 (type_code != lbrace || !btype_2)) { 430 /* we should force a broken line here */ 431 if (verbose && !flushed_nl) 432 diag(0, "Line broken"); 433 flushed_nl = false; 434 dump_line(); 435 ps.want_blank = false; /* dont insert blank at line start */ 436 force_nl = false; 437 } 438 ps.in_stmt = true; /* turn on flag which causes an extra level of 439 * indentation. this is turned off by a ; or 440 * '}' */ 441 if (s_com != e_com) { /* the turkey has embedded a comment 442 * in a line. fix it */ 443 *e_code++ = ' '; 444 for (t_ptr = s_com; *t_ptr; ++t_ptr) { 445 CHECK_SIZE_CODE; 446 *e_code++ = *t_ptr; 447 } 448 *e_code++ = ' '; 449 *e_code = '\0'; /* null terminate code sect */ 450 ps.want_blank = false; 451 e_com = s_com; 452 } 453 } 454 else if (type_code != comment) /* preserve force_nl thru a comment */ 455 force_nl = false; /* cancel forced newline after newline, form 456 * feed, etc */ 457 458 459 460 /*-----------------------------------------------------*\ 461 | do switch on type of token scanned | 462 \*-----------------------------------------------------*/ 463 CHECK_SIZE_CODE; 464 switch (type_code) { /* now, decide what to do with the token */ 465 466 case form_feed: /* found a form feed in line */ 467 ps.use_ff = true; /* a form feed is treated much like a newline */ 468 dump_line(); 469 ps.want_blank = false; 470 break; 471 472 case newline: 473 if (ps.last_token != comma || ps.p_l_follow > 0 474 || !ps.leave_comma || ps.block_init || !break_comma || s_com != e_com) { 475 dump_line(); 476 ps.want_blank = false; 477 } 478 ++line_no; /* keep track of input line number */ 479 break; 480 481 case lparen: /* got a '(' or '[' */ 482 ++ps.p_l_follow; /* count parens to make Healy happy */ 483 if (ps.want_blank && *token != '[' && 484 (ps.last_token != ident || proc_calls_space 485 || (ps.its_a_keyword && (!ps.sizeof_keyword || Bill_Shannon)))) 486 *e_code++ = ' '; 487 if (ps.in_decl && !ps.block_init) 488 if (troff && !ps.dumped_decl_indent && !is_procname && ps.last_token == decl) { 489 ps.dumped_decl_indent = 1; 490 snprintf(e_code, (l_code - e_code) + 5, 491 "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token); 492 e_code += strlen(e_code); 493 CHECK_SIZE_CODE; 494 } 495 else { 496 while ((e_code - s_code) < dec_ind) { 497 CHECK_SIZE_CODE; 498 *e_code++ = ' '; 499 } 500 *e_code++ = token[0]; 501 } 502 else 503 *e_code++ = token[0]; 504 ps.paren_indents[ps.p_l_follow - 1] = e_code - s_code; 505 if (sp_sw && ps.p_l_follow == 1 && extra_expression_indent 506 && ps.paren_indents[0] < 2 * ps.ind_size) 507 ps.paren_indents[0] = 2 * ps.ind_size; 508 ps.want_blank = false; 509 if (ps.in_or_st && *token == '(' && ps.tos <= 2) { 510 /* 511 * this is a kluge to make sure that declarations will be 512 * aligned right if proc decl has an explicit type on it, i.e. 513 * "int a(x) {..." 514 */ 515 parse(semicolon); /* I said this was a kluge... */ 516 ps.in_or_st = false; /* turn off flag for structure decl or 517 * initialization */ 518 } 519 if (ps.sizeof_keyword) 520 ps.sizeof_mask |= 1 << ps.p_l_follow; 521 break; 522 523 case rparen: /* got a ')' or ']' */ 524 rparen_count--; 525 if (ps.cast_mask & (1 << ps.p_l_follow) & ~ps.sizeof_mask) { 526 ps.last_u_d = true; 527 ps.cast_mask &= (1 << ps.p_l_follow) - 1; 528 } 529 ps.sizeof_mask &= (1 << ps.p_l_follow) - 1; 530 if (--ps.p_l_follow < 0) { 531 ps.p_l_follow = 0; 532 diag(0, "Extra %c", *token); 533 } 534 if (e_code == s_code) /* if the paren starts the line */ 535 ps.paren_level = ps.p_l_follow; /* then indent it */ 536 537 *e_code++ = token[0]; 538 ps.want_blank = true; 539 540 if (sp_sw && (ps.p_l_follow == 0)) { /* check for end of if 541 * (...), or some such */ 542 sp_sw = false; 543 force_nl = true;/* must force newline after if */ 544 ps.last_u_d = true; /* inform lexi that a following 545 * operator is unary */ 546 ps.in_stmt = false; /* dont use stmt continuation 547 * indentation */ 548 549 parse(hd_type); /* let parser worry about if, or whatever */ 550 } 551 ps.search_brace = btype_2; /* this should insure that constructs 552 * such as main(){...} and int[]{...} 553 * have their braces put in the right 554 * place */ 555 break; 556 557 case unary_op: /* this could be any unary operation */ 558 if (ps.want_blank) 559 *e_code++ = ' '; 560 561 if (troff && !ps.dumped_decl_indent && ps.in_decl && !is_procname) { 562 snprintf(e_code, (l_code - e_code) + 5, 563 "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token); 564 ps.dumped_decl_indent = 1; 565 e_code += strlen(e_code); 566 CHECK_SIZE_CODE; 567 } 568 else { 569 char *res = token; 570 571 if (ps.in_decl && !ps.block_init) { /* if this is a unary op 572 * in a declaration, we 573 * should indent this 574 * token */ 575 for (i = 0; token[i]; ++i); /* find length of token */ 576 while ((e_code - s_code) < (dec_ind - i)) { 577 CHECK_SIZE_CODE; 578 *e_code++ = ' '; /* pad it */ 579 } 580 } 581 if (troff && token[0] == '-' && token[1] == '>') 582 res = "\\(->"; 583 for (t_ptr = res; *t_ptr; ++t_ptr) { 584 CHECK_SIZE_CODE; 585 *e_code++ = *t_ptr; 586 } 587 } 588 ps.want_blank = false; 589 break; 590 591 case binary_op: /* any binary operation */ 592 if (ps.want_blank) 593 *e_code++ = ' '; 594 { 595 char *res = token; 596 597 if (troff) 598 switch (token[0]) { 599 case '<': 600 if (token[1] == '=') 601 res = "\\(<="; 602 break; 603 case '>': 604 if (token[1] == '=') 605 res = "\\(>="; 606 break; 607 case '!': 608 if (token[1] == '=') 609 res = "\\(!="; 610 break; 611 case '|': 612 if (token[1] == '|') 613 res = "\\(br\\(br"; 614 else if (token[1] == 0) 615 res = "\\(br"; 616 break; 617 } 618 for (t_ptr = res; *t_ptr; ++t_ptr) { 619 CHECK_SIZE_CODE; 620 *e_code++ = *t_ptr; /* move the operator */ 621 } 622 } 623 ps.want_blank = true; 624 break; 625 626 case postop: /* got a trailing ++ or -- */ 627 *e_code++ = token[0]; 628 *e_code++ = token[1]; 629 ps.want_blank = true; 630 break; 631 632 case question: /* got a ? */ 633 squest++; /* this will be used when a later colon 634 * appears so we can distinguish the 635 * <c>?<n>:<n> construct */ 636 if (ps.want_blank) 637 *e_code++ = ' '; 638 *e_code++ = '?'; 639 ps.want_blank = true; 640 break; 641 642 case casestmt: /* got word 'case' or 'default' */ 643 scase = true; /* so we can process the later colon properly */ 644 goto copy_id; 645 646 case colon: /* got a ':' */ 647 if (squest > 0) { /* it is part of the <c>?<n>: <n> construct */ 648 --squest; 649 if (ps.want_blank) 650 *e_code++ = ' '; 651 *e_code++ = ':'; 652 ps.want_blank = true; 653 break; 654 } 655 if (ps.in_decl) { 656 *e_code++ = ':'; 657 ps.want_blank = false; 658 break; 659 } 660 ps.in_stmt = false; /* seeing a label does not imply we are in a 661 * stmt */ 662 for (t_ptr = s_code; *t_ptr; ++t_ptr) 663 *e_lab++ = *t_ptr; /* turn everything so far into a label */ 664 e_code = s_code; 665 *e_lab++ = ':'; 666 *e_lab++ = ' '; 667 *e_lab = '\0'; 668 669 force_nl = ps.pcase = scase; /* ps.pcase will be used by 670 * dump_line to decide how to 671 * indent the label. force_nl 672 * will force a case n: to be 673 * on a line by itself */ 674 scase = false; 675 ps.want_blank = false; 676 break; 677 678 case semicolon: /* got a ';' */ 679 ps.in_or_st = false;/* we are not in an initialization or 680 * structure declaration */ 681 scase = false; /* these will only need resetting in a error */ 682 squest = 0; 683 if (ps.last_token == rparen && rparen_count == 0) 684 ps.in_parameter_declaration = 0; 685 ps.cast_mask = 0; 686 ps.sizeof_mask = 0; 687 ps.block_init = 0; 688 ps.block_init_level = 0; 689 ps.just_saw_decl--; 690 691 if (ps.in_decl && s_code == e_code && !ps.block_init) 692 while ((e_code - s_code) < (dec_ind - 1)) { 693 CHECK_SIZE_CODE; 694 *e_code++ = ' '; 695 } 696 697 ps.in_decl = (ps.dec_nest > 0); /* if we were in a first level 698 * structure declaration, we 699 * arent any more */ 700 701 if ((!sp_sw || hd_type != forstmt) && ps.p_l_follow > 0) { 702 703 /* 704 * This should be true iff there were unbalanced parens in the 705 * stmt. It is a bit complicated, because the semicolon might 706 * be in a for stmt 707 */ 708 diag(1, "Unbalanced parens"); 709 ps.p_l_follow = 0; 710 if (sp_sw) { /* this is a check for a if, while, etc. with 711 * unbalanced parens */ 712 sp_sw = false; 713 parse(hd_type); /* dont lose the if, or whatever */ 714 } 715 } 716 *e_code++ = ';'; 717 ps.want_blank = true; 718 ps.in_stmt = (ps.p_l_follow > 0); /* we are no longer in the 719 * middle of a stmt */ 720 721 if (!sp_sw) { /* if not if for (;;) */ 722 parse(semicolon); /* let parser know about end of stmt */ 723 force_nl = true;/* force newline after a end of stmt */ 724 } 725 break; 726 727 case lbrace: /* got a '{' */ 728 ps.in_stmt = false; /* dont indent the {} */ 729 if (!ps.block_init) 730 force_nl = true;/* force other stuff on same line as '{' onto 731 * new line */ 732 else if (ps.block_init_level <= 0) 733 ps.block_init_level = 1; 734 else 735 ps.block_init_level++; 736 737 if (s_code != e_code && !ps.block_init) { 738 if (!btype_2) { 739 dump_line(); 740 ps.want_blank = false; 741 } 742 else if (ps.in_parameter_declaration && !ps.in_or_st) { 743 ps.i_l_follow = 0; 744 dump_line(); 745 ps.want_blank = false; 746 } 747 } 748 if (ps.in_parameter_declaration) 749 prefix_blankline_requested = 0; 750 751 if (ps.p_l_follow > 0) { /* check for preceding unbalanced 752 * parens */ 753 diag(1, "Unbalanced parens"); 754 ps.p_l_follow = 0; 755 if (sp_sw) { /* check for unclosed if, for, etc. */ 756 sp_sw = false; 757 parse(hd_type); 758 ps.ind_level = ps.i_l_follow; 759 } 760 } 761 if (s_code == e_code) 762 ps.ind_stmt = false; /* dont put extra indentation on line 763 * with '{' */ 764 if (ps.in_decl && ps.in_or_st) { /* this is either a structure 765 * declaration or an init */ 766 di_stack[ps.dec_nest++] = dec_ind; 767 /* ? dec_ind = 0; */ 768 } 769 else { 770 ps.decl_on_line = false; 771 /* we can't be in the middle of a declaration, so don't do 772 * special indentation of comments */ 773 if (blanklines_after_declarations_at_proctop 774 && ps.in_parameter_declaration) 775 postfix_blankline_requested = 1; 776 ps.in_parameter_declaration = 0; 777 } 778 dec_ind = 0; 779 parse(lbrace); /* let parser know about this */ 780 if (ps.want_blank) /* put a blank before '{' if '{' is not at 781 * start of line */ 782 *e_code++ = ' '; 783 ps.want_blank = false; 784 *e_code++ = '{'; 785 ps.just_saw_decl = 0; 786 break; 787 788 case rbrace: /* got a '}' */ 789 if (ps.p_stack[ps.tos] == decl && !ps.block_init) /* semicolons can be 790 * omitted in 791 * declarations */ 792 parse(semicolon); 793 if (ps.p_l_follow) {/* check for unclosed if, for, else. */ 794 diag(1, "Unbalanced parens"); 795 ps.p_l_follow = 0; 796 sp_sw = false; 797 } 798 ps.just_saw_decl = 0; 799 ps.block_init_level--; 800 if (s_code != e_code && !ps.block_init) { /* '}' must be first on 801 * line */ 802 if (verbose) 803 diag(0, "Line broken"); 804 dump_line(); 805 } 806 *e_code++ = '}'; 807 ps.want_blank = true; 808 ps.in_stmt = ps.ind_stmt = false; 809 if (ps.dec_nest > 0) { /* we are in multi-level structure 810 * declaration */ 811 dec_ind = di_stack[--ps.dec_nest]; 812 if (ps.dec_nest == 0 && !ps.in_parameter_declaration) 813 ps.just_saw_decl = 2; 814 ps.in_decl = true; 815 } 816 prefix_blankline_requested = 0; 817 parse(rbrace); /* let parser know about this */ 818 ps.search_brace = cuddle_else && ps.p_stack[ps.tos] == ifhead 819 && ps.il[ps.tos] >= ps.ind_level; 820 if (ps.tos <= 1 && blanklines_after_procs && ps.dec_nest <= 0) 821 postfix_blankline_requested = 1; 822 break; 823 824 case swstmt: /* got keyword "switch" */ 825 sp_sw = true; 826 hd_type = swstmt; /* keep this for when we have seen the 827 * expression */ 828 goto copy_id; /* go move the token into buffer */ 829 830 case sp_paren: /* token is if, while, for */ 831 sp_sw = true; /* the interesting stuff is done after the 832 * expression is scanned */ 833 hd_type = (*token == 'i' ? ifstmt : 834 (*token == 'w' ? whilestmt : forstmt)); 835 836 /* 837 * remember the type of header for later use by parser 838 */ 839 goto copy_id; /* copy the token into line */ 840 841 case sp_nparen: /* got else, do */ 842 ps.in_stmt = false; 843 if (*token == 'e') { 844 if (e_code != s_code && (!cuddle_else || e_code[-1] != '}')) { 845 if (verbose) 846 diag(0, "Line broken"); 847 dump_line();/* make sure this starts a line */ 848 ps.want_blank = false; 849 } 850 force_nl = true;/* also, following stuff must go onto new line */ 851 last_else = 1; 852 parse(elselit); 853 } 854 else { 855 if (e_code != s_code) { /* make sure this starts a line */ 856 if (verbose) 857 diag(0, "Line broken"); 858 dump_line(); 859 ps.want_blank = false; 860 } 861 force_nl = true;/* also, following stuff must go onto new line */ 862 last_else = 0; 863 parse(dolit); 864 } 865 goto copy_id; /* move the token into line */ 866 867 case decl: /* we have a declaration type (int, register, 868 * etc.) */ 869 parse(decl); /* let parser worry about indentation */ 870 if (ps.last_token == rparen && ps.tos <= 1) { 871 ps.in_parameter_declaration = 1; 872 if (s_code != e_code) { 873 dump_line(); 874 ps.want_blank = 0; 875 } 876 } 877 if (ps.in_parameter_declaration && ps.indent_parameters && ps.dec_nest == 0) { 878 ps.ind_level = ps.i_l_follow = 1; 879 ps.ind_stmt = 0; 880 } 881 ps.in_or_st = true; /* this might be a structure or initialization 882 * declaration */ 883 ps.in_decl = ps.decl_on_line = true; 884 if ( /* !ps.in_or_st && */ ps.dec_nest <= 0) 885 ps.just_saw_decl = 2; 886 prefix_blankline_requested = 0; 887 for (i = 0; token[i++];); /* get length of token */ 888 889 /* 890 * dec_ind = e_code - s_code + (ps.decl_indent>i ? ps.decl_indent 891 * : i); 892 */ 893 dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i; 894 goto copy_id; 895 896 case ident: /* got an identifier or constant */ 897 if (ps.in_decl) { /* if we are in a declaration, we must indent 898 * identifier */ 899 if (ps.want_blank) 900 *e_code++ = ' '; 901 ps.want_blank = false; 902 if (is_procname == 0 || !procnames_start_line) { 903 if (!ps.block_init) { 904 if (troff && !ps.dumped_decl_indent) { 905 snprintf(e_code, (l_code - e_code) + 5, 906 "\n.De %dp+\200p\n", dec_ind * 7); 907 ps.dumped_decl_indent = 1; 908 e_code += strlen(e_code); 909 CHECK_SIZE_CODE; 910 } 911 else 912 while ((e_code - s_code) < dec_ind) { 913 CHECK_SIZE_CODE; 914 *e_code++ = ' '; 915 } 916 } 917 } 918 else { 919 if (dec_ind && s_code != e_code) 920 dump_line(); 921 dec_ind = 0; 922 ps.want_blank = false; 923 } 924 } 925 else if (sp_sw && ps.p_l_follow == 0) { 926 sp_sw = false; 927 force_nl = true; 928 ps.last_u_d = true; 929 ps.in_stmt = false; 930 parse(hd_type); 931 } 932 copy_id: 933 if (ps.want_blank) 934 *e_code++ = ' '; 935 if (troff && ps.its_a_keyword) { 936 e_code = chfont(&bodyf, &keywordf, e_code); 937 for (t_ptr = token; *t_ptr; ++t_ptr) { 938 CHECK_SIZE_CODE; 939 *e_code++ = keywordf.allcaps && islower(*t_ptr) 940 ? toupper(*t_ptr) : *t_ptr; 941 } 942 e_code = chfont(&keywordf, &bodyf, e_code); 943 } 944 else 945 for (t_ptr = token; *t_ptr; ++t_ptr) { 946 CHECK_SIZE_CODE; 947 *e_code++ = *t_ptr; 948 } 949 ps.want_blank = true; 950 break; 951 952 case period: /* treat a period kind of like a binary 953 * operation */ 954 *e_code++ = '.'; /* move the period into line */ 955 ps.want_blank = false; /* dont put a blank after a period */ 956 break; 957 958 case comma: 959 ps.want_blank = (s_code != e_code); /* only put blank after comma 960 * if comma does not start the 961 * line */ 962 if (ps.in_decl && is_procname == 0 && !ps.block_init) 963 while ((e_code - s_code) < (dec_ind - 1)) { 964 CHECK_SIZE_CODE; 965 *e_code++ = ' '; 966 } 967 968 *e_code++ = ','; 969 if (ps.p_l_follow == 0) { 970 if (ps.block_init_level <= 0) 971 ps.block_init = 0; 972 if (break_comma && (!ps.leave_comma || compute_code_target() + (e_code - s_code) > max_col - 8)) 973 force_nl = true; 974 } 975 break; 976 977 case preesc: /* got the character '#' */ 978 if ((s_com != e_com) || 979 (s_lab != e_lab) || 980 (s_code != e_code)) 981 dump_line(); 982 *e_lab++ = '#'; /* move whole line to 'label' buffer */ 983 { 984 int in_comment = 0; 985 int com_start = 0; 986 char quote = 0; 987 int com_end = 0; 988 989 while (*buf_ptr == ' ' || *buf_ptr == '\t') { 990 buf_ptr++; 991 if (buf_ptr >= buf_end) 992 fill_buffer(); 993 } 994 while (*buf_ptr != '\n' || (in_comment && !had_eof)) { 995 CHECK_SIZE_LAB; 996 *e_lab = *buf_ptr++; 997 if (buf_ptr >= buf_end) 998 fill_buffer(); 999 switch (*e_lab++) { 1000 case BACKSLASH: 1001 if (troff) 1002 *e_lab++ = BACKSLASH; 1003 if (!in_comment) { 1004 *e_lab++ = *buf_ptr++; 1005 if (buf_ptr >= buf_end) 1006 fill_buffer(); 1007 } 1008 break; 1009 case '/': 1010 if (*buf_ptr == '*' && !in_comment && !quote) { 1011 in_comment = 1; 1012 *e_lab++ = *buf_ptr++; 1013 com_start = e_lab - s_lab - 2; 1014 } 1015 break; 1016 case '"': 1017 if (quote == '"') 1018 quote = 0; 1019 break; 1020 case '\'': 1021 if (quote == '\'') 1022 quote = 0; 1023 break; 1024 case '*': 1025 if (*buf_ptr == '/' && in_comment) { 1026 in_comment = 0; 1027 *e_lab++ = *buf_ptr++; 1028 com_end = e_lab - s_lab; 1029 } 1030 break; 1031 } 1032 } 1033 1034 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 1035 e_lab--; 1036 if (e_lab - s_lab == com_end && bp_save == 0) { /* comment on 1037 * preprocessor line */ 1038 if (sc_end == 0) /* if this is the first comment, we 1039 * must set up the buffer */ 1040 sc_end = &(save_com[0]); 1041 else { 1042 *sc_end++ = '\n'; /* add newline between 1043 * comments */ 1044 *sc_end++ = ' '; 1045 --line_no; 1046 } 1047 bcopy(s_lab + com_start, sc_end, com_end - com_start); 1048 sc_end += com_end - com_start; 1049 if (sc_end >= &save_com[sc_size]) 1050 abort(); 1051 e_lab = s_lab + com_start; 1052 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 1053 e_lab--; 1054 bp_save = buf_ptr; /* save current input buffer */ 1055 be_save = buf_end; 1056 buf_ptr = save_com; /* fix so that subsequent calls to 1057 * lexi will take tokens out of 1058 * save_com */ 1059 *sc_end++ = ' '; /* add trailing blank, just in case */ 1060 buf_end = sc_end; 1061 sc_end = 0; 1062 } 1063 *e_lab = '\0'; /* null terminate line */ 1064 ps.pcase = false; 1065 } 1066 1067 if (strncmp(s_lab, "#if", 3) == 0) { 1068 if (blanklines_around_conditional_compilation) { 1069 int c; 1070 prefix_blankline_requested++; 1071 while ((c = getc(input)) == '\n'); 1072 ungetc(c, input); 1073 } 1074 if (ifdef_level < sizeof state_stack / sizeof state_stack[0]) { 1075 match_state[ifdef_level].tos = -1; 1076 state_stack[ifdef_level++] = ps; 1077 } 1078 else 1079 diag(1, "#if stack overflow"); 1080 } 1081 else if (strncmp(s_lab, "#else", 5) == 0) 1082 if (ifdef_level <= 0) 1083 diag(1, "Unmatched #else"); 1084 else { 1085 match_state[ifdef_level - 1] = ps; 1086 ps = state_stack[ifdef_level - 1]; 1087 } 1088 else if (strncmp(s_lab, "#endif", 6) == 0) { 1089 if (ifdef_level <= 0) 1090 diag(1, "Unmatched #endif"); 1091 else { 1092 ifdef_level--; 1093 1094 #ifdef undef 1095 /* 1096 * This match needs to be more intelligent before the 1097 * message is useful 1098 */ 1099 if (match_state[ifdef_level].tos >= 0 1100 && bcmp(&ps, &match_state[ifdef_level], sizeof ps)) 1101 diag(0, "Syntactically inconsistent #ifdef alternatives."); 1102 #endif 1103 } 1104 if (blanklines_around_conditional_compilation) { 1105 postfix_blankline_requested++; 1106 n_real_blanklines = 0; 1107 } 1108 } 1109 break; /* subsequent processing of the newline 1110 * character will cause the line to be printed */ 1111 1112 case comment: /* we have gotten a comment this is a biggie */ 1113 if (flushed_nl) { /* we should force a broken line here */ 1114 flushed_nl = false; 1115 dump_line(); 1116 ps.want_blank = false; /* dont insert blank at line start */ 1117 force_nl = false; 1118 } 1119 pr_comment(); 1120 break; 1121 } /* end of big switch stmt */ 1122 1123 *e_code = '\0'; /* make sure code section is null terminated */ 1124 if (type_code != comment && type_code != newline && type_code != preesc) 1125 ps.last_token = type_code; 1126 } /* end of main while (1) loop */ 1127 } 1128 1129 /* 1130 * copy input file to backup file if in_name is /blah/blah/blah/file, then 1131 * backup file will be ".Bfile" then make the backup file the input and 1132 * original input file the output 1133 */ 1134 void 1135 bakcopy(void) 1136 { 1137 int n, 1138 bakchn; 1139 char buff[8 * 1024]; 1140 char *p; 1141 1142 /* construct file name .Bfile */ 1143 for (p = in_name; *p; p++); /* skip to end of string */ 1144 while (p > in_name && *p != '/') /* find last '/' */ 1145 p--; 1146 if (*p == '/') 1147 p++; 1148 if (snprintf(bakfile, MAXPATHLEN, "%s.BAK", p) >= MAXPATHLEN) 1149 errx(1, "%s.BAK: %s", p, strerror(ENAMETOOLONG)); 1150 1151 /* copy in_name to backup file */ 1152 bakchn = creat(bakfile, 0600); 1153 if (bakchn < 0) 1154 err(1, "%s", bakfile); 1155 while ((n = read(fileno(input), buff, sizeof buff)) > 0) 1156 if (write(bakchn, buff, n) != n) 1157 err(1, "%s", bakfile); 1158 if (n < 0) 1159 err(1, "%s", in_name); 1160 close(bakchn); 1161 fclose(input); 1162 1163 /* re-open backup file as the input file */ 1164 input = fopen(bakfile, "r"); 1165 if (input == NULL) 1166 err(1, "%s", bakfile); 1167 /* now the original input file will be the output */ 1168 output = fopen(in_name, "w"); 1169 if (output == NULL) { 1170 unlink(bakfile); 1171 err(1, "%s", in_name); 1172 } 1173 } 1174