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 * %sccs.include.redist.c% 8 */ 9 10 #ifndef lint 11 char copyright[] = 12 "@(#) Copyright (c) 1985 Sun Microsystems, Inc.\n\ 13 @(#) Copyright (c) 1976 Board of Trustees of the University of Illinois.\n\ 14 @(#) Copyright (c) 1980, 1993\n\ 15 The Regents of the University of California. All rights reserved.\n"; 16 #endif /* not lint */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)indent.c 5.17 (Berkeley) 06/07/93"; 20 #endif /* not lint */ 21 22 #include <sys/param.h> 23 #include <fcntl.h> 24 #include <unistd.h> 25 #include <stdio.h> 26 #include <stdlib.h> 27 #include <string.h> 28 #include "indent_globs.h" 29 #include "indent_codes.h" 30 #include <ctype.h> 31 32 char *in_name = "Standard Input"; /* will always point to name of input 33 * file */ 34 char *out_name = "Standard Output"; /* will always point to name 35 * of output file */ 36 char bakfile[MAXPATHLEN] = ""; 37 38 main(argc, argv) 39 int argc; 40 char **argv; 41 { 42 43 extern int found_err; /* flag set in diag() on error */ 44 int dec_ind; /* current indentation for declarations */ 45 int di_stack[20]; /* a stack of structure indentation levels */ 46 int flushed_nl; /* used when buffering up comments to remember 47 * that a newline was passed over */ 48 int force_nl; /* when true, code must be broken */ 49 int hd_type; /* used to store type of stmt for if (...), 50 * for (...), etc */ 51 register int i; /* local loop counter */ 52 int scase; /* set to true when we see a case, so we will 53 * know what to do with the following colon */ 54 int sp_sw; /* when true, we are in the expressin of 55 * if(...), while(...), etc. */ 56 int squest; /* when this is positive, we have seen a ? 57 * without the matching : in a <c>?<s>:<s> 58 * construct */ 59 register char *t_ptr; /* used for copying tokens */ 60 int type_code; /* the type of token, returned by lexi */ 61 62 int last_else = 0; /* true iff last keyword was an else */ 63 64 65 /*-----------------------------------------------*\ 66 | INITIALIZATION | 67 \*-----------------------------------------------*/ 68 69 70 ps.p_stack[0] = stmt; /* this is the parser's stack */ 71 ps.last_nl = true; /* this is true if the last thing scanned was 72 * a newline */ 73 ps.last_token = semicolon; 74 combuf = (char *) malloc(bufsize); 75 labbuf = (char *) malloc(bufsize); 76 codebuf = (char *) malloc(bufsize); 77 tokenbuf = (char *) malloc(bufsize); 78 l_com = combuf + bufsize - 5; 79 l_lab = labbuf + bufsize - 5; 80 l_code = codebuf + bufsize - 5; 81 l_token = tokenbuf + bufsize - 5; 82 combuf[0] = codebuf[0] = labbuf[0] = ' '; /* set up code, label, and 83 * comment buffers */ 84 combuf[1] = codebuf[1] = labbuf[1] = '\0'; 85 ps.else_if = 1; /* Default else-if special processing to on */ 86 s_lab = e_lab = labbuf + 1; 87 s_code = e_code = codebuf + 1; 88 s_com = e_com = combuf + 1; 89 s_token = e_token = tokenbuf + 1; 90 91 in_buffer = (char *) malloc(10); 92 in_buffer_limit = in_buffer + 8; 93 buf_ptr = buf_end = in_buffer; 94 line_no = 1; 95 had_eof = ps.in_decl = ps.decl_on_line = break_comma = false; 96 sp_sw = force_nl = false; 97 ps.in_or_st = false; 98 ps.bl_line = true; 99 dec_ind = 0; 100 di_stack[ps.dec_nest = 0] = 0; 101 ps.want_blank = ps.in_stmt = ps.ind_stmt = false; 102 103 104 scase = ps.pcase = false; 105 squest = 0; 106 sc_end = 0; 107 bp_save = 0; 108 be_save = 0; 109 110 output = 0; 111 112 113 114 /*--------------------------------------------------*\ 115 | COMMAND LINE SCAN | 116 \*--------------------------------------------------*/ 117 118 #ifdef undef 119 max_col = 78; /* -l78 */ 120 lineup_to_parens = 1; /* -lp */ 121 ps.ljust_decl = 0; /* -ndj */ 122 ps.com_ind = 33; /* -c33 */ 123 star_comment_cont = 1; /* -sc */ 124 ps.ind_size = 8; /* -i8 */ 125 verbose = 0; 126 ps.decl_indent = 16; /* -di16 */ 127 ps.indent_parameters = 1; /* -ip */ 128 ps.decl_com_ind = 0; /* if this is not set to some positive value 129 * by an arg, we will set this equal to 130 * ps.com_ind */ 131 btype_2 = 1; /* -br */ 132 cuddle_else = 1; /* -ce */ 133 ps.unindent_displace = 0; /* -d0 */ 134 ps.case_indent = 0; /* -cli0 */ 135 format_col1_comments = 1; /* -fc1 */ 136 procnames_start_line = 1; /* -psl */ 137 proc_calls_space = 0; /* -npcs */ 138 comment_delimiter_on_blankline = 1; /* -cdb */ 139 ps.leave_comma = 1; /* -nbc */ 140 #endif 141 142 for (i = 1; i < argc; ++i) 143 if (strcmp(argv[i], "-npro") == 0) 144 break; 145 set_defaults(); 146 if (i >= argc) 147 set_profile(); 148 149 for (i = 1; i < argc; ++i) { 150 151 /* 152 * look thru args (if any) for changes to defaults 153 */ 154 if (argv[i][0] != '-') {/* no flag on parameter */ 155 if (input == 0) { /* we must have the input file */ 156 in_name = argv[i]; /* remember name of input file */ 157 input = fopen(in_name, "r"); 158 if (input == 0) /* check for open error */ 159 err(in_name); 160 continue; 161 } 162 else if (output == 0) { /* we have the output file */ 163 out_name = argv[i]; /* remember name of output file */ 164 if (strcmp(in_name, out_name) == 0) { /* attempt to overwrite 165 * the file */ 166 fprintf(stderr, "indent: input and output files must be different\n"); 167 exit(1); 168 } 169 output = fopen(out_name, "w"); 170 if (output == 0) /* check for create error */ 171 err(out_name); 172 continue; 173 } 174 fprintf(stderr, "indent: unknown parameter: %s\n", argv[i]); 175 exit(1); 176 } 177 else 178 set_option(argv[i]); 179 } /* end of for */ 180 if (input == 0) { 181 fprintf(stderr, "indent: usage: indent file [ outfile ] [ options ]\n"); 182 exit(1); 183 } 184 if (output == 0) 185 if (troff) 186 output = stdout; 187 else { 188 out_name = in_name; 189 bakcopy(); 190 } 191 if (ps.com_ind <= 1) 192 ps.com_ind = 2; /* dont put normal comments before column 2 */ 193 if (troff) { 194 if (bodyf.font[0] == 0) 195 parsefont(&bodyf, "R"); 196 if (scomf.font[0] == 0) 197 parsefont(&scomf, "I"); 198 if (blkcomf.font[0] == 0) 199 blkcomf = scomf, blkcomf.size += 2; 200 if (boxcomf.font[0] == 0) 201 boxcomf = blkcomf; 202 if (stringf.font[0] == 0) 203 parsefont(&stringf, "L"); 204 if (keywordf.font[0] == 0) 205 parsefont(&keywordf, "B"); 206 writefdef(&bodyf, 'B'); 207 writefdef(&scomf, 'C'); 208 writefdef(&blkcomf, 'L'); 209 writefdef(&boxcomf, 'X'); 210 writefdef(&stringf, 'S'); 211 writefdef(&keywordf, 'K'); 212 } 213 if (block_comment_max_col <= 0) 214 block_comment_max_col = max_col; 215 if (ps.decl_com_ind <= 0) /* if not specified by user, set this */ 216 ps.decl_com_ind = ps.ljust_decl ? (ps.com_ind <= 10 ? 2 : ps.com_ind - 8) : ps.com_ind; 217 if (continuation_indent == 0) 218 continuation_indent = ps.ind_size; 219 fill_buffer(); /* get first batch of stuff into input buffer */ 220 221 parse(semicolon); 222 { 223 register char *p = buf_ptr; 224 register col = 1; 225 226 while (1) { 227 if (*p == ' ') 228 col++; 229 else if (*p == '\t') 230 col = ((col - 1) & ~7) + 9; 231 else 232 break; 233 p++; 234 } 235 if (col > ps.ind_size) 236 ps.ind_level = ps.i_l_follow = col / ps.ind_size; 237 } 238 if (troff) { 239 register char *p = in_name, 240 *beg = in_name; 241 242 while (*p) 243 if (*p++ == '/') 244 beg = p; 245 fprintf(output, ".Fn \"%s\"\n", beg); 246 } 247 /* 248 * START OF MAIN LOOP 249 */ 250 251 while (1) { /* this is the main loop. it will go until we 252 * reach eof */ 253 int is_procname; 254 255 type_code = lexi(); /* lexi reads one token. The actual 256 * characters read are stored in "token". lexi 257 * returns a code indicating the type of token */ 258 is_procname = ps.procname[0]; 259 260 /* 261 * The following code moves everything following an if (), while (), 262 * else, etc. up to the start of the following stmt to a buffer. This 263 * allows proper handling of both kinds of brace placement. 264 */ 265 266 flushed_nl = false; 267 while (ps.search_brace) { /* if we scanned an if(), while(), 268 * etc., we might need to copy stuff 269 * into a buffer we must loop, copying 270 * stuff into save_com, until we find 271 * the start of the stmt which follows 272 * the if, or whatever */ 273 switch (type_code) { 274 case newline: 275 ++line_no; 276 flushed_nl = true; 277 case form_feed: 278 break; /* form feeds and newlines found here will be 279 * ignored */ 280 281 case lbrace: /* this is a brace that starts the compound 282 * stmt */ 283 if (sc_end == 0) { /* ignore buffering if a comment wasnt 284 * stored up */ 285 ps.search_brace = false; 286 goto check_type; 287 } 288 if (btype_2) { 289 save_com[0] = '{'; /* we either want to put the brace 290 * right after the if */ 291 goto sw_buffer; /* go to common code to get out of 292 * this loop */ 293 } 294 case comment: /* we have a comment, so we must copy it into 295 * the buffer */ 296 if (!flushed_nl || sc_end != 0) { 297 if (sc_end == 0) { /* if this is the first comment, we 298 * must set up the buffer */ 299 save_com[0] = save_com[1] = ' '; 300 sc_end = &(save_com[2]); 301 } 302 else { 303 *sc_end++ = '\n'; /* add newline between 304 * comments */ 305 *sc_end++ = ' '; 306 --line_no; 307 } 308 *sc_end++ = '/'; /* copy in start of comment */ 309 *sc_end++ = '*'; 310 311 for (;;) { /* loop until we get to the end of the comment */ 312 *sc_end = *buf_ptr++; 313 if (buf_ptr >= buf_end) 314 fill_buffer(); 315 316 if (*sc_end++ == '*' && *buf_ptr == '/') 317 break; /* we are at end of comment */ 318 319 if (sc_end >= &(save_com[sc_size])) { /* check for temp buffer 320 * overflow */ 321 diag(1, "Internal buffer overflow - Move big comment from right after if, while, or whatever."); 322 fflush(output); 323 exit(1); 324 } 325 } 326 *sc_end++ = '/'; /* add ending slash */ 327 if (++buf_ptr >= buf_end) /* get past / in buffer */ 328 fill_buffer(); 329 break; 330 } 331 default: /* it is the start of a normal statment */ 332 if (flushed_nl) /* if we flushed a newline, make sure it is 333 * put back */ 334 force_nl = true; 335 if (type_code == sp_paren && *token == 'i' 336 && last_else && ps.else_if 337 || type_code == sp_nparen && *token == 'e' 338 && e_code != s_code && e_code[-1] == '}') 339 force_nl = false; 340 341 if (sc_end == 0) { /* ignore buffering if comment wasnt 342 * saved up */ 343 ps.search_brace = false; 344 goto check_type; 345 } 346 if (force_nl) { /* if we should insert a nl here, put it into 347 * the buffer */ 348 force_nl = false; 349 --line_no; /* this will be re-increased when the nl is 350 * read from the buffer */ 351 *sc_end++ = '\n'; 352 *sc_end++ = ' '; 353 if (verbose && !flushed_nl) /* print error msg if the line 354 * was not already broken */ 355 diag(0, "Line broken"); 356 flushed_nl = false; 357 } 358 for (t_ptr = token; *t_ptr; ++t_ptr) 359 *sc_end++ = *t_ptr; /* copy token into temp buffer */ 360 ps.procname[0] = 0; 361 362 sw_buffer: 363 ps.search_brace = false; /* stop looking for start of 364 * stmt */ 365 bp_save = buf_ptr; /* save current input buffer */ 366 be_save = buf_end; 367 buf_ptr = save_com; /* fix so that subsequent calls to 368 * lexi will take tokens out of 369 * save_com */ 370 *sc_end++ = ' ';/* add trailing blank, just in case */ 371 buf_end = sc_end; 372 sc_end = 0; 373 break; 374 } /* end of switch */ 375 if (type_code != 0) /* we must make this check, just in case there 376 * was an unexpected EOF */ 377 type_code = lexi(); /* read another token */ 378 /* if (ps.search_brace) ps.procname[0] = 0; */ 379 if ((is_procname = ps.procname[0]) && flushed_nl 380 && !procnames_start_line && ps.in_decl 381 && type_code == ident) 382 flushed_nl = 0; 383 } /* end of while (search_brace) */ 384 last_else = 0; 385 check_type: 386 if (type_code == 0) { /* we got eof */ 387 if (s_lab != e_lab || s_code != e_code 388 || s_com != e_com) /* must dump end of line */ 389 dump_line(); 390 if (ps.tos > 1) /* check for balanced braces */ 391 diag(1, "Stuff missing from end of file."); 392 393 if (verbose) { 394 printf("There were %d output lines and %d comments\n", 395 ps.out_lines, ps.out_coms); 396 printf("(Lines with comments)/(Lines with code): %6.3f\n", 397 (1.0 * ps.com_lines) / code_lines); 398 } 399 fflush(output); 400 exit(found_err); 401 } 402 if ( 403 (type_code != comment) && 404 (type_code != newline) && 405 (type_code != preesc) && 406 (type_code != form_feed)) { 407 if (force_nl && 408 (type_code != semicolon) && 409 (type_code != lbrace || !btype_2)) { 410 /* we should force a broken line here */ 411 if (verbose && !flushed_nl) 412 diag(0, "Line broken"); 413 flushed_nl = false; 414 dump_line(); 415 ps.want_blank = false; /* dont insert blank at line start */ 416 force_nl = false; 417 } 418 ps.in_stmt = true; /* turn on flag which causes an extra level of 419 * indentation. this is turned off by a ; or 420 * '}' */ 421 if (s_com != e_com) { /* the turkey has embedded a comment 422 * in a line. fix it */ 423 *e_code++ = ' '; 424 for (t_ptr = s_com; *t_ptr; ++t_ptr) { 425 CHECK_SIZE_CODE; 426 *e_code++ = *t_ptr; 427 } 428 *e_code++ = ' '; 429 *e_code = '\0'; /* null terminate code sect */ 430 ps.want_blank = false; 431 e_com = s_com; 432 } 433 } 434 else if (type_code != comment) /* preserve force_nl thru a comment */ 435 force_nl = false; /* cancel forced newline after newline, form 436 * feed, etc */ 437 438 439 440 /*-----------------------------------------------------*\ 441 | do switch on type of token scanned | 442 \*-----------------------------------------------------*/ 443 CHECK_SIZE_CODE; 444 switch (type_code) { /* now, decide what to do with the token */ 445 446 case form_feed: /* found a form feed in line */ 447 ps.use_ff = true; /* a form feed is treated much like a newline */ 448 dump_line(); 449 ps.want_blank = false; 450 break; 451 452 case newline: 453 if (ps.last_token != comma || ps.p_l_follow > 0 454 || !ps.leave_comma || ps.block_init || !break_comma || s_com != e_com) { 455 dump_line(); 456 ps.want_blank = false; 457 } 458 ++line_no; /* keep track of input line number */ 459 break; 460 461 case lparen: /* got a '(' or '[' */ 462 ++ps.p_l_follow; /* count parens to make Healy happy */ 463 if (ps.want_blank && *token != '[' && 464 (ps.last_token != ident || proc_calls_space 465 || (ps.its_a_keyword && (!ps.sizeof_keyword || Bill_Shannon)))) 466 *e_code++ = ' '; 467 if (ps.in_decl && !ps.block_init) 468 if (troff && !ps.dumped_decl_indent && !is_procname && ps.last_token == decl) { 469 ps.dumped_decl_indent = 1; 470 sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token); 471 e_code += strlen(e_code); 472 } 473 else { 474 while ((e_code - s_code) < dec_ind) { 475 CHECK_SIZE_CODE; 476 *e_code++ = ' '; 477 } 478 *e_code++ = token[0]; 479 } 480 else 481 *e_code++ = token[0]; 482 ps.paren_indents[ps.p_l_follow - 1] = e_code - s_code; 483 if (sp_sw && ps.p_l_follow == 1 && extra_expression_indent 484 && ps.paren_indents[0] < 2 * ps.ind_size) 485 ps.paren_indents[0] = 2 * ps.ind_size; 486 ps.want_blank = false; 487 if (ps.in_or_st && *token == '(' && ps.tos <= 2) { 488 /* 489 * this is a kluge to make sure that declarations will be 490 * aligned right if proc decl has an explicit type on it, i.e. 491 * "int a(x) {..." 492 */ 493 parse(semicolon); /* I said this was a kluge... */ 494 ps.in_or_st = false; /* turn off flag for structure decl or 495 * initialization */ 496 } 497 if (ps.sizeof_keyword) 498 ps.sizeof_mask |= 1 << ps.p_l_follow; 499 break; 500 501 case rparen: /* got a ')' or ']' */ 502 rparen_count--; 503 if (ps.cast_mask & (1 << ps.p_l_follow) & ~ps.sizeof_mask) { 504 ps.last_u_d = true; 505 ps.cast_mask &= (1 << ps.p_l_follow) - 1; 506 } 507 ps.sizeof_mask &= (1 << ps.p_l_follow) - 1; 508 if (--ps.p_l_follow < 0) { 509 ps.p_l_follow = 0; 510 diag(0, "Extra %c", *token); 511 } 512 if (e_code == s_code) /* if the paren starts the line */ 513 ps.paren_level = ps.p_l_follow; /* then indent it */ 514 515 *e_code++ = token[0]; 516 ps.want_blank = true; 517 518 if (sp_sw && (ps.p_l_follow == 0)) { /* check for end of if 519 * (...), or some such */ 520 sp_sw = false; 521 force_nl = true;/* must force newline after if */ 522 ps.last_u_d = true; /* inform lexi that a following 523 * operator is unary */ 524 ps.in_stmt = false; /* dont use stmt continuation 525 * indentation */ 526 527 parse(hd_type); /* let parser worry about if, or whatever */ 528 } 529 ps.search_brace = btype_2; /* this should insure that constructs 530 * such as main(){...} and int[]{...} 531 * have their braces put in the right 532 * place */ 533 break; 534 535 case unary_op: /* this could be any unary operation */ 536 if (ps.want_blank) 537 *e_code++ = ' '; 538 539 if (troff && !ps.dumped_decl_indent && ps.in_decl && !is_procname) { 540 sprintf(e_code, "\n.Du %dp+\200p \"%s\"\n", dec_ind * 7, token); 541 ps.dumped_decl_indent = 1; 542 e_code += strlen(e_code); 543 } 544 else { 545 char *res = token; 546 547 if (ps.in_decl && !ps.block_init) { /* if this is a unary op 548 * in a declaration, we 549 * should indent this 550 * token */ 551 for (i = 0; token[i]; ++i); /* find length of token */ 552 while ((e_code - s_code) < (dec_ind - i)) { 553 CHECK_SIZE_CODE; 554 *e_code++ = ' '; /* pad it */ 555 } 556 } 557 if (troff && token[0] == '-' && token[1] == '>') 558 res = "\\(->"; 559 for (t_ptr = res; *t_ptr; ++t_ptr) { 560 CHECK_SIZE_CODE; 561 *e_code++ = *t_ptr; 562 } 563 } 564 ps.want_blank = false; 565 break; 566 567 case binary_op: /* any binary operation */ 568 if (ps.want_blank) 569 *e_code++ = ' '; 570 { 571 char *res = token; 572 573 if (troff) 574 switch (token[0]) { 575 case '<': 576 if (token[1] == '=') 577 res = "\\(<="; 578 break; 579 case '>': 580 if (token[1] == '=') 581 res = "\\(>="; 582 break; 583 case '!': 584 if (token[1] == '=') 585 res = "\\(!="; 586 break; 587 case '|': 588 if (token[1] == '|') 589 res = "\\(br\\(br"; 590 else if (token[1] == 0) 591 res = "\\(br"; 592 break; 593 } 594 for (t_ptr = res; *t_ptr; ++t_ptr) { 595 CHECK_SIZE_CODE; 596 *e_code++ = *t_ptr; /* move the operator */ 597 } 598 } 599 ps.want_blank = true; 600 break; 601 602 case postop: /* got a trailing ++ or -- */ 603 *e_code++ = token[0]; 604 *e_code++ = token[1]; 605 ps.want_blank = true; 606 break; 607 608 case question: /* got a ? */ 609 squest++; /* this will be used when a later colon 610 * appears so we can distinguish the 611 * <c>?<n>:<n> construct */ 612 if (ps.want_blank) 613 *e_code++ = ' '; 614 *e_code++ = '?'; 615 ps.want_blank = true; 616 break; 617 618 case casestmt: /* got word 'case' or 'default' */ 619 scase = true; /* so we can process the later colon properly */ 620 goto copy_id; 621 622 case colon: /* got a ':' */ 623 if (squest > 0) { /* it is part of the <c>?<n>: <n> construct */ 624 --squest; 625 if (ps.want_blank) 626 *e_code++ = ' '; 627 *e_code++ = ':'; 628 ps.want_blank = true; 629 break; 630 } 631 if (ps.in_decl) { 632 *e_code++ = ':'; 633 ps.want_blank = false; 634 break; 635 } 636 ps.in_stmt = false; /* seeing a label does not imply we are in a 637 * stmt */ 638 for (t_ptr = s_code; *t_ptr; ++t_ptr) 639 *e_lab++ = *t_ptr; /* turn everything so far into a label */ 640 e_code = s_code; 641 *e_lab++ = ':'; 642 *e_lab++ = ' '; 643 *e_lab = '\0'; 644 645 force_nl = ps.pcase = scase; /* ps.pcase will be used by 646 * dump_line to decide how to 647 * indent the label. force_nl 648 * will force a case n: to be 649 * on a line by itself */ 650 scase = false; 651 ps.want_blank = false; 652 break; 653 654 case semicolon: /* got a ';' */ 655 ps.in_or_st = false;/* we are not in an initialization or 656 * structure declaration */ 657 scase = false; /* these will only need resetting in a error */ 658 squest = 0; 659 if (ps.last_token == rparen && rparen_count == 0) 660 ps.in_parameter_declaration = 0; 661 ps.cast_mask = 0; 662 ps.sizeof_mask = 0; 663 ps.block_init = 0; 664 ps.block_init_level = 0; 665 ps.just_saw_decl--; 666 667 if (ps.in_decl && s_code == e_code && !ps.block_init) 668 while ((e_code - s_code) < (dec_ind - 1)) { 669 CHECK_SIZE_CODE; 670 *e_code++ = ' '; 671 } 672 673 ps.in_decl = (ps.dec_nest > 0); /* if we were in a first level 674 * structure declaration, we 675 * arent any more */ 676 677 if ((!sp_sw || hd_type != forstmt) && ps.p_l_follow > 0) { 678 679 /* 680 * This should be true iff there were unbalanced parens in the 681 * stmt. It is a bit complicated, because the semicolon might 682 * be in a for stmt 683 */ 684 diag(1, "Unbalanced parens"); 685 ps.p_l_follow = 0; 686 if (sp_sw) { /* this is a check for a if, while, etc. with 687 * unbalanced parens */ 688 sp_sw = false; 689 parse(hd_type); /* dont lose the if, or whatever */ 690 } 691 } 692 *e_code++ = ';'; 693 ps.want_blank = true; 694 ps.in_stmt = (ps.p_l_follow > 0); /* we are no longer in the 695 * middle of a stmt */ 696 697 if (!sp_sw) { /* if not if for (;;) */ 698 parse(semicolon); /* let parser know about end of stmt */ 699 force_nl = true;/* force newline after a end of stmt */ 700 } 701 break; 702 703 case lbrace: /* got a '{' */ 704 ps.in_stmt = false; /* dont indent the {} */ 705 if (!ps.block_init) 706 force_nl = true;/* force other stuff on same line as '{' onto 707 * new line */ 708 else if (ps.block_init_level <= 0) 709 ps.block_init_level = 1; 710 else 711 ps.block_init_level++; 712 713 if (s_code != e_code && !ps.block_init) { 714 if (!btype_2) { 715 dump_line(); 716 ps.want_blank = false; 717 } 718 else if (ps.in_parameter_declaration && !ps.in_or_st) { 719 ps.i_l_follow = 0; 720 dump_line(); 721 ps.want_blank = false; 722 } 723 } 724 if (ps.in_parameter_declaration) 725 prefix_blankline_requested = 0; 726 727 if (ps.p_l_follow > 0) { /* check for preceeding unbalanced 728 * parens */ 729 diag(1, "Unbalanced parens"); 730 ps.p_l_follow = 0; 731 if (sp_sw) { /* check for unclosed if, for, etc. */ 732 sp_sw = false; 733 parse(hd_type); 734 ps.ind_level = ps.i_l_follow; 735 } 736 } 737 if (s_code == e_code) 738 ps.ind_stmt = false; /* dont put extra indentation on line 739 * with '{' */ 740 if (ps.in_decl && ps.in_or_st) { /* this is either a structure 741 * declaration or an init */ 742 di_stack[ps.dec_nest++] = dec_ind; 743 /* ? dec_ind = 0; */ 744 } 745 else { 746 ps.decl_on_line = false; /* we cant be in the middle of 747 * a declaration, so dont do 748 * special indentation of 749 * comments */ 750 if (blanklines_after_declarations_at_proctop 751 && ps.in_parameter_declaration) 752 postfix_blankline_requested = 1; 753 ps.in_parameter_declaration = 0; 754 } 755 dec_ind = 0; 756 parse(lbrace); /* let parser know about this */ 757 if (ps.want_blank) /* put a blank before '{' if '{' is not at 758 * start of line */ 759 *e_code++ = ' '; 760 ps.want_blank = false; 761 *e_code++ = '{'; 762 ps.just_saw_decl = 0; 763 break; 764 765 case rbrace: /* got a '}' */ 766 if (ps.p_stack[ps.tos] == decl && !ps.block_init) /* semicolons can be 767 * omitted in 768 * declarations */ 769 parse(semicolon); 770 if (ps.p_l_follow) {/* check for unclosed if, for, else. */ 771 diag(1, "Unbalanced parens"); 772 ps.p_l_follow = 0; 773 sp_sw = false; 774 } 775 ps.just_saw_decl = 0; 776 ps.block_init_level--; 777 if (s_code != e_code && !ps.block_init) { /* '}' must be first on 778 * line */ 779 if (verbose) 780 diag(0, "Line broken"); 781 dump_line(); 782 } 783 *e_code++ = '}'; 784 ps.want_blank = true; 785 ps.in_stmt = ps.ind_stmt = false; 786 if (ps.dec_nest > 0) { /* we are in multi-level structure 787 * declaration */ 788 dec_ind = di_stack[--ps.dec_nest]; 789 if (ps.dec_nest == 0 && !ps.in_parameter_declaration) 790 ps.just_saw_decl = 2; 791 ps.in_decl = true; 792 } 793 prefix_blankline_requested = 0; 794 parse(rbrace); /* let parser know about this */ 795 ps.search_brace = cuddle_else && ps.p_stack[ps.tos] == ifhead 796 && ps.il[ps.tos] >= ps.ind_level; 797 if (ps.tos <= 1 && blanklines_after_procs && ps.dec_nest <= 0) 798 postfix_blankline_requested = 1; 799 break; 800 801 case swstmt: /* got keyword "switch" */ 802 sp_sw = true; 803 hd_type = swstmt; /* keep this for when we have seen the 804 * expression */ 805 goto copy_id; /* go move the token into buffer */ 806 807 case sp_paren: /* token is if, while, for */ 808 sp_sw = true; /* the interesting stuff is done after the 809 * expression is scanned */ 810 hd_type = (*token == 'i' ? ifstmt : 811 (*token == 'w' ? whilestmt : forstmt)); 812 813 /* 814 * remember the type of header for later use by parser 815 */ 816 goto copy_id; /* copy the token into line */ 817 818 case sp_nparen: /* got else, do */ 819 ps.in_stmt = false; 820 if (*token == 'e') { 821 if (e_code != s_code && (!cuddle_else || e_code[-1] != '}')) { 822 if (verbose) 823 diag(0, "Line broken"); 824 dump_line();/* make sure this starts a line */ 825 ps.want_blank = false; 826 } 827 force_nl = true;/* also, following stuff must go onto new line */ 828 last_else = 1; 829 parse(elselit); 830 } 831 else { 832 if (e_code != s_code) { /* make sure this starts a line */ 833 if (verbose) 834 diag(0, "Line broken"); 835 dump_line(); 836 ps.want_blank = false; 837 } 838 force_nl = true;/* also, following stuff must go onto new line */ 839 last_else = 0; 840 parse(dolit); 841 } 842 goto copy_id; /* move the token into line */ 843 844 case decl: /* we have a declaration type (int, register, 845 * etc.) */ 846 parse(decl); /* let parser worry about indentation */ 847 if (ps.last_token == rparen && ps.tos <= 1) { 848 ps.in_parameter_declaration = 1; 849 if (s_code != e_code) { 850 dump_line(); 851 ps.want_blank = 0; 852 } 853 } 854 if (ps.in_parameter_declaration && ps.indent_parameters && ps.dec_nest == 0) { 855 ps.ind_level = ps.i_l_follow = 1; 856 ps.ind_stmt = 0; 857 } 858 ps.in_or_st = true; /* this might be a structure or initialization 859 * declaration */ 860 ps.in_decl = ps.decl_on_line = true; 861 if ( /* !ps.in_or_st && */ ps.dec_nest <= 0) 862 ps.just_saw_decl = 2; 863 prefix_blankline_requested = 0; 864 for (i = 0; token[i++];); /* get length of token */ 865 866 /* 867 * dec_ind = e_code - s_code + (ps.decl_indent>i ? ps.decl_indent 868 * : i); 869 */ 870 dec_ind = ps.decl_indent > 0 ? ps.decl_indent : i; 871 goto copy_id; 872 873 case ident: /* got an identifier or constant */ 874 if (ps.in_decl) { /* if we are in a declaration, we must indent 875 * identifier */ 876 if (ps.want_blank) 877 *e_code++ = ' '; 878 ps.want_blank = false; 879 if (is_procname == 0 || !procnames_start_line) { 880 if (!ps.block_init) 881 if (troff && !ps.dumped_decl_indent) { 882 sprintf(e_code, "\n.De %dp+\200p\n", dec_ind * 7); 883 ps.dumped_decl_indent = 1; 884 e_code += strlen(e_code); 885 } 886 else 887 while ((e_code - s_code) < dec_ind) { 888 CHECK_SIZE_CODE; 889 *e_code++ = ' '; 890 } 891 } 892 else { 893 if (dec_ind && s_code != e_code) 894 dump_line(); 895 dec_ind = 0; 896 ps.want_blank = false; 897 } 898 } 899 else if (sp_sw && ps.p_l_follow == 0) { 900 sp_sw = false; 901 force_nl = true; 902 ps.last_u_d = true; 903 ps.in_stmt = false; 904 parse(hd_type); 905 } 906 copy_id: 907 if (ps.want_blank) 908 *e_code++ = ' '; 909 if (troff && ps.its_a_keyword) { 910 e_code = chfont(&bodyf, &keywordf, e_code); 911 for (t_ptr = token; *t_ptr; ++t_ptr) { 912 CHECK_SIZE_CODE; 913 *e_code++ = keywordf.allcaps && islower(*t_ptr) 914 ? toupper(*t_ptr) : *t_ptr; 915 } 916 e_code = chfont(&keywordf, &bodyf, e_code); 917 } 918 else 919 for (t_ptr = token; *t_ptr; ++t_ptr) { 920 CHECK_SIZE_CODE; 921 *e_code++ = *t_ptr; 922 } 923 ps.want_blank = true; 924 break; 925 926 case period: /* treat a period kind of like a binary 927 * operation */ 928 *e_code++ = '.'; /* move the period into line */ 929 ps.want_blank = false; /* dont put a blank after a period */ 930 break; 931 932 case comma: 933 ps.want_blank = (s_code != e_code); /* only put blank after comma 934 * if comma does not start the 935 * line */ 936 if (ps.in_decl && is_procname == 0 && !ps.block_init) 937 while ((e_code - s_code) < (dec_ind - 1)) { 938 CHECK_SIZE_CODE; 939 *e_code++ = ' '; 940 } 941 942 *e_code++ = ','; 943 if (ps.p_l_follow == 0) { 944 if (ps.block_init_level <= 0) 945 ps.block_init = 0; 946 if (break_comma && (!ps.leave_comma || compute_code_target() + (e_code - s_code) > max_col - 8)) 947 force_nl = true; 948 } 949 break; 950 951 case preesc: /* got the character '#' */ 952 if ((s_com != e_com) || 953 (s_lab != e_lab) || 954 (s_code != e_code)) 955 dump_line(); 956 *e_lab++ = '#'; /* move whole line to 'label' buffer */ 957 { 958 int in_comment = 0; 959 int com_start = 0; 960 char quote = 0; 961 int com_end = 0; 962 963 while (*buf_ptr == ' ' || *buf_ptr == '\t') { 964 buf_ptr++; 965 if (buf_ptr >= buf_end) 966 fill_buffer(); 967 } 968 while (*buf_ptr != '\n' || in_comment) { 969 CHECK_SIZE_LAB; 970 *e_lab = *buf_ptr++; 971 if (buf_ptr >= buf_end) 972 fill_buffer(); 973 switch (*e_lab++) { 974 case BACKSLASH: 975 if (troff) 976 *e_lab++ = BACKSLASH; 977 if (!in_comment) { 978 *e_lab++ = *buf_ptr++; 979 if (buf_ptr >= buf_end) 980 fill_buffer(); 981 } 982 break; 983 case '/': 984 if (*buf_ptr == '*' && !in_comment && !quote) { 985 in_comment = 1; 986 *e_lab++ = *buf_ptr++; 987 com_start = e_lab - s_lab - 2; 988 } 989 break; 990 case '"': 991 if (quote == '"') 992 quote = 0; 993 break; 994 case '\'': 995 if (quote == '\'') 996 quote = 0; 997 break; 998 case '*': 999 if (*buf_ptr == '/' && in_comment) { 1000 in_comment = 0; 1001 *e_lab++ = *buf_ptr++; 1002 com_end = e_lab - s_lab; 1003 } 1004 break; 1005 } 1006 } 1007 1008 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 1009 e_lab--; 1010 if (e_lab - s_lab == com_end && bp_save == 0) { /* comment on 1011 * preprocessor line */ 1012 if (sc_end == 0) /* if this is the first comment, we 1013 * must set up the buffer */ 1014 sc_end = &(save_com[0]); 1015 else { 1016 *sc_end++ = '\n'; /* add newline between 1017 * comments */ 1018 *sc_end++ = ' '; 1019 --line_no; 1020 } 1021 bcopy(s_lab + com_start, sc_end, com_end - com_start); 1022 sc_end += com_end - com_start; 1023 if (sc_end >= &save_com[sc_size]) 1024 abort(); 1025 e_lab = s_lab + com_start; 1026 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 1027 e_lab--; 1028 bp_save = buf_ptr; /* save current input buffer */ 1029 be_save = buf_end; 1030 buf_ptr = save_com; /* fix so that subsequent calls to 1031 * lexi will take tokens out of 1032 * save_com */ 1033 *sc_end++ = ' '; /* add trailing blank, just in case */ 1034 buf_end = sc_end; 1035 sc_end = 0; 1036 } 1037 *e_lab = '\0'; /* null terminate line */ 1038 ps.pcase = false; 1039 } 1040 1041 if (strncmp(s_lab, "#if", 3) == 0) { 1042 if (blanklines_around_conditional_compilation) { 1043 register c; 1044 prefix_blankline_requested++; 1045 while ((c = getc(input)) == '\n'); 1046 ungetc(c, input); 1047 } 1048 if (ifdef_level < sizeof state_stack / sizeof state_stack[0]) { 1049 match_state[ifdef_level].tos = -1; 1050 state_stack[ifdef_level++] = ps; 1051 } 1052 else 1053 diag(1, "#if stack overflow"); 1054 } 1055 else if (strncmp(s_lab, "#else", 5) == 0) 1056 if (ifdef_level <= 0) 1057 diag(1, "Unmatched #else"); 1058 else { 1059 match_state[ifdef_level - 1] = ps; 1060 ps = state_stack[ifdef_level - 1]; 1061 } 1062 else if (strncmp(s_lab, "#endif", 6) == 0) { 1063 if (ifdef_level <= 0) 1064 diag(1, "Unmatched #endif"); 1065 else { 1066 ifdef_level--; 1067 1068 #ifdef undef 1069 /* 1070 * This match needs to be more intelligent before the 1071 * message is useful 1072 */ 1073 if (match_state[ifdef_level].tos >= 0 1074 && bcmp(&ps, &match_state[ifdef_level], sizeof ps)) 1075 diag(0, "Syntactically inconsistant #ifdef alternatives."); 1076 #endif 1077 } 1078 if (blanklines_around_conditional_compilation) { 1079 postfix_blankline_requested++; 1080 n_real_blanklines = 0; 1081 } 1082 } 1083 break; /* subsequent processing of the newline 1084 * character will cause the line to be printed */ 1085 1086 case comment: /* we have gotten a /* this is a biggie */ 1087 if (flushed_nl) { /* we should force a broken line here */ 1088 flushed_nl = false; 1089 dump_line(); 1090 ps.want_blank = false; /* dont insert blank at line start */ 1091 force_nl = false; 1092 } 1093 pr_comment(); 1094 break; 1095 } /* end of big switch stmt */ 1096 1097 *e_code = '\0'; /* make sure code section is null terminated */ 1098 if (type_code != comment && type_code != newline && type_code != preesc) 1099 ps.last_token = type_code; 1100 } /* end of main while (1) loop */ 1101 } 1102 1103 /* 1104 * copy input file to backup file if in_name is /blah/blah/blah/file, then 1105 * backup file will be ".Bfile" then make the backup file the input and 1106 * original input file the output 1107 */ 1108 bakcopy() 1109 { 1110 int n, 1111 bakchn; 1112 char buff[8 * 1024]; 1113 register char *p; 1114 1115 /* construct file name .Bfile */ 1116 for (p = in_name; *p; p++); /* skip to end of string */ 1117 while (p > in_name && *p != '/') /* find last '/' */ 1118 p--; 1119 if (*p == '/') 1120 p++; 1121 sprintf(bakfile, "%s.BAK", p); 1122 1123 /* copy in_name to backup file */ 1124 bakchn = creat(bakfile, 0600); 1125 if (bakchn < 0) 1126 err(bakfile); 1127 while (n = read(fileno(input), buff, sizeof buff)) 1128 if (write(bakchn, buff, n) != n) 1129 err(bakfile); 1130 if (n < 0) 1131 err(in_name); 1132 close(bakchn); 1133 fclose(input); 1134 1135 /* re-open backup file as the input file */ 1136 input = fopen(bakfile, "r"); 1137 if (input == 0) 1138 err(bakfile); 1139 /* now the original input file will be the output */ 1140 output = fopen(in_name, "w"); 1141 if (output == 0) { 1142 unlink(bakfile); 1143 err(in_name); 1144 } 1145 } 1146 1147 err(msg) 1148 char *msg; 1149 { 1150 extern int errno; 1151 char *strerror(); 1152 1153 (void)fprintf(stderr, "indent: %s: %s\n", msg, strerror(errno)); 1154 exit(1); 1155 } 1156