1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1985 Sun Microsystems, Inc. 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 #include <ctype.h> 40 #include <err.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include "indent_globs.h" 45 #include "indent.h" 46 47 /* Globals */ 48 int found_err; 49 int n_real_blanklines; 50 int prefix_blankline_requested, postfix_blankline_requested; 51 int code_lines; 52 int had_eof; 53 int inhibit_formatting; 54 int suppress_blanklines; 55 56 int comment_open; 57 static int paren_target; 58 static int pad_output(int current, int target); 59 60 void 61 dump_line(void) 62 { /* dump_line is the routine that actually 63 * effects the printing of the new source. It 64 * prints the label section, followed by the 65 * code section with the appropriate nesting 66 * level, followed by any comments */ 67 int cur_col, 68 target_col = 1; 69 static int not_first_line; 70 71 if (ps.procname[0]) { 72 ps.ind_level = 0; 73 ps.procname[0] = 0; 74 } 75 if (s_code == e_code && s_lab == e_lab && s_com == e_com) { 76 if (suppress_blanklines > 0) 77 suppress_blanklines--; 78 else { 79 ps.bl_line = true; 80 n_real_blanklines++; 81 } 82 } 83 else if (!inhibit_formatting) { 84 suppress_blanklines = 0; 85 ps.bl_line = false; 86 if (prefix_blankline_requested && not_first_line) { 87 if (opt.swallow_optional_blanklines) { 88 if (n_real_blanklines == 1) 89 n_real_blanklines = 0; 90 } 91 else { 92 if (n_real_blanklines == 0) 93 n_real_blanklines = 1; 94 } 95 } 96 while (--n_real_blanklines >= 0) 97 putc('\n', output); 98 n_real_blanklines = 0; 99 if (ps.ind_level == 0) 100 ps.ind_stmt = 0; /* this is a class A kludge. dont do 101 * additional statement indentation if we are 102 * at bracket level 0 */ 103 104 if (e_lab != s_lab || e_code != s_code) 105 ++code_lines; /* keep count of lines with code */ 106 107 108 if (e_lab != s_lab) { /* print lab, if any */ 109 if (comment_open) { 110 comment_open = 0; 111 fprintf(output, ".*/\n"); 112 } 113 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 114 e_lab--; 115 *e_lab = '\0'; 116 cur_col = pad_output(1, compute_label_target()); 117 if (s_lab[0] == '#' && (strncmp(s_lab, "#else", 5) == 0 118 || strncmp(s_lab, "#endif", 6) == 0)) { 119 char *s = s_lab; 120 if (e_lab[-1] == '\n') e_lab--; 121 do putc(*s++, output); 122 while (s < e_lab && 'a' <= *s && *s<='z'); 123 while ((*s == ' ' || *s == '\t') && s < e_lab) 124 s++; 125 if (s < e_lab) 126 fprintf(output, s[0]=='/' && s[1]=='*' ? "\t%.*s" : "\t/* %.*s */", 127 (int)(e_lab - s), s); 128 } 129 else fprintf(output, "%.*s", (int)(e_lab - s_lab), s_lab); 130 cur_col = count_spaces(cur_col, s_lab); 131 } 132 else 133 cur_col = 1; /* there is no label section */ 134 135 ps.pcase = false; 136 137 if (s_code != e_code) { /* print code section, if any */ 138 char *p; 139 140 if (comment_open) { 141 comment_open = 0; 142 fprintf(output, ".*/\n"); 143 } 144 target_col = compute_code_target(); 145 { 146 int i; 147 148 for (i = 0; i < ps.p_l_follow; i++) 149 if (ps.paren_indents[i] >= 0) 150 ps.paren_indents[i] = -(ps.paren_indents[i] + target_col); 151 } 152 cur_col = pad_output(cur_col, target_col); 153 for (p = s_code; p < e_code; p++) 154 if (*p == (char) 0200) 155 fprintf(output, "%d", target_col * 7); 156 else 157 putc(*p, output); 158 cur_col = count_spaces(cur_col, s_code); 159 } 160 if (s_com != e_com) { /* print comment, if any */ 161 int target = ps.com_col; 162 char *com_st = s_com; 163 164 target += ps.comment_delta; 165 while (*com_st == '\t') /* consider original indentation in 166 * case this is a box comment */ 167 com_st++, target += opt.tabsize; 168 while (target <= 0) 169 if (*com_st == ' ') 170 target++, com_st++; 171 else if (*com_st == '\t') { 172 target = opt.tabsize * (1 + (target - 1) / opt.tabsize) + 1; 173 com_st++; 174 } 175 else 176 target = 1; 177 if (cur_col > target) { /* if comment can't fit on this line, 178 * put it on next line */ 179 putc('\n', output); 180 cur_col = 1; 181 ++ps.out_lines; 182 } 183 while (e_com > com_st && isspace((unsigned char)e_com[-1])) 184 e_com--; 185 (void)pad_output(cur_col, target); 186 fwrite(com_st, e_com - com_st, 1, output); 187 ps.comment_delta = ps.n_comment_delta; 188 ++ps.com_lines; /* count lines with comments */ 189 } 190 if (ps.use_ff) 191 putc('\014', output); 192 else 193 putc('\n', output); 194 ++ps.out_lines; 195 if (ps.just_saw_decl == 1 && opt.blanklines_after_declarations) { 196 prefix_blankline_requested = 1; 197 ps.just_saw_decl = 0; 198 } 199 else 200 prefix_blankline_requested = postfix_blankline_requested; 201 postfix_blankline_requested = 0; 202 } 203 ps.decl_on_line = ps.in_decl; /* if we are in the middle of a 204 * declaration, remember that fact for 205 * proper comment indentation */ 206 ps.ind_stmt = ps.in_stmt & ~ps.in_decl; /* next line should be 207 * indented if we have not 208 * completed this stmt and if 209 * we are not in the middle of 210 * a declaration */ 211 ps.use_ff = false; 212 ps.dumped_decl_indent = 0; 213 *(e_lab = s_lab) = '\0'; /* reset buffers */ 214 *(e_code = s_code) = '\0'; 215 *(e_com = s_com = combuf + 1) = '\0'; 216 ps.ind_level = ps.i_l_follow; 217 ps.paren_level = ps.p_l_follow; 218 if (ps.paren_level > 0) 219 paren_target = -ps.paren_indents[ps.paren_level - 1]; 220 not_first_line = 1; 221 } 222 223 int 224 compute_code_target(void) 225 { 226 int target_col = opt.ind_size * ps.ind_level + 1; 227 228 if (ps.paren_level) 229 if (!opt.lineup_to_parens) 230 target_col += opt.continuation_indent * 231 (2 * opt.continuation_indent == opt.ind_size ? 1 : ps.paren_level); 232 else if (opt.lineup_to_parens_always) 233 target_col = paren_target; 234 else { 235 int w; 236 int t = paren_target; 237 238 if ((w = count_spaces(t, s_code) - opt.max_col) > 0 239 && count_spaces(target_col, s_code) <= opt.max_col) { 240 t -= w + 1; 241 if (t > target_col) 242 target_col = t; 243 } 244 else 245 target_col = t; 246 } 247 else if (ps.ind_stmt) 248 target_col += opt.continuation_indent; 249 return target_col; 250 } 251 252 int 253 compute_label_target(void) 254 { 255 return 256 ps.pcase ? (int) (case_ind * opt.ind_size) + 1 257 : *s_lab == '#' ? 1 258 : opt.ind_size * (ps.ind_level - label_offset) + 1; 259 } 260 261 262 /* 263 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois 264 * 265 * All rights reserved 266 * 267 * 268 * NAME: fill_buffer 269 * 270 * FUNCTION: Reads one block of input into input_buffer 271 * 272 * HISTORY: initial coding November 1976 D A Willcox of CAC 1/7/77 A 273 * Willcox of CAC Added check for switch back to partly full input 274 * buffer from temporary buffer 275 * 276 */ 277 void 278 fill_buffer(void) 279 { /* this routine reads stuff from the input */ 280 char *p; 281 int i; 282 FILE *f = input; 283 284 if (bp_save != NULL) { /* there is a partly filled input buffer left */ 285 buf_ptr = bp_save; /* do not read anything, just switch buffers */ 286 buf_end = be_save; 287 bp_save = be_save = NULL; 288 if (buf_ptr < buf_end) 289 return; /* only return if there is really something in 290 * this buffer */ 291 } 292 for (p = in_buffer;;) { 293 if (p >= in_buffer_limit) { 294 int size = (in_buffer_limit - in_buffer) * 2 + 10; 295 int offset = p - in_buffer; 296 in_buffer = realloc(in_buffer, size); 297 if (in_buffer == NULL) 298 errx(1, "input line too long"); 299 p = in_buffer + offset; 300 in_buffer_limit = in_buffer + size - 2; 301 } 302 if ((i = getc(f)) == EOF) { 303 *p++ = ' '; 304 *p++ = '\n'; 305 had_eof = true; 306 break; 307 } 308 if (i != '\0') 309 *p++ = i; 310 if (i == '\n') 311 break; 312 } 313 buf_ptr = in_buffer; 314 buf_end = p; 315 if (p - in_buffer > 2 && p[-2] == '/' && p[-3] == '*') { 316 if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0) 317 fill_buffer(); /* flush indent error message */ 318 else { 319 int com = 0; 320 321 p = in_buffer; 322 while (*p == ' ' || *p == '\t') 323 p++; 324 if (*p == '/' && p[1] == '*') { 325 p += 2; 326 while (*p == ' ' || *p == '\t') 327 p++; 328 if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E' 329 && p[4] == 'N' && p[5] == 'T') { 330 p += 6; 331 while (*p == ' ' || *p == '\t') 332 p++; 333 if (*p == '*') 334 com = 1; 335 else if (*p == 'O') { 336 if (*++p == 'N') 337 p++, com = 1; 338 else if (*p == 'F' && *++p == 'F') 339 p++, com = 2; 340 } 341 while (*p == ' ' || *p == '\t') 342 p++; 343 if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) { 344 if (s_com != e_com || s_lab != e_lab || s_code != e_code) 345 dump_line(); 346 if (!(inhibit_formatting = com - 1)) { 347 n_real_blanklines = 0; 348 postfix_blankline_requested = 0; 349 prefix_blankline_requested = 0; 350 suppress_blanklines = 1; 351 } 352 } 353 } 354 } 355 } 356 } 357 if (inhibit_formatting) { 358 p = in_buffer; 359 do 360 putc(*p, output); 361 while (*p++ != '\n'); 362 } 363 } 364 365 /* 366 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois 367 * 368 * All rights reserved 369 * 370 * 371 * NAME: pad_output 372 * 373 * FUNCTION: Writes tabs and spaces to move the current column up to the desired 374 * position. 375 * 376 * ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf. 377 * 378 * PARAMETERS: current integer The current column target 379 * nteger The desired column 380 * 381 * RETURNS: Integer value of the new column. (If current >= target, no action is 382 * taken, and current is returned. 383 * 384 * GLOBALS: None 385 * 386 * CALLS: write (sys) 387 * 388 * CALLED BY: dump_line 389 * 390 * HISTORY: initial coding November 1976 D A Willcox of CAC 391 * 392 */ 393 static int 394 pad_output(int current, int target) 395 /* writes tabs and blanks (if necessary) to 396 * get the current output position up to the 397 * target column */ 398 /* current: the current column value */ 399 /* target: position we want it at */ 400 { 401 int curr; /* internal column pointer */ 402 403 if (current >= target) 404 return (current); /* line is already long enough */ 405 curr = current; 406 if (opt.use_tabs) { 407 int tcur; 408 409 while ((tcur = opt.tabsize * (1 + (curr - 1) / opt.tabsize) + 1) <= target) { 410 putc('\t', output); 411 curr = tcur; 412 } 413 } 414 while (curr++ < target) 415 putc(' ', output); /* pad with final blanks */ 416 417 return (target); 418 } 419 420 /* 421 * Copyright (C) 1976 by the Board of Trustees of the University of Illinois 422 * 423 * All rights reserved 424 * 425 * 426 * NAME: count_spaces 427 * 428 * FUNCTION: Find out where printing of a given string will leave the current 429 * character position on output. 430 * 431 * ALGORITHM: Run thru input string and add appropriate values to current 432 * position. 433 * 434 * RETURNS: Integer value of position after printing "buffer" starting in column 435 * "current". 436 * 437 * HISTORY: initial coding November 1976 D A Willcox of CAC 438 * 439 */ 440 int 441 count_spaces_until(int cur, char *buffer, char *end) 442 /* 443 * this routine figures out where the character position will be after 444 * printing the text in buffer starting at column "current" 445 */ 446 { 447 char *buf; /* used to look thru buffer */ 448 449 for (buf = buffer; *buf != '\0' && buf != end; ++buf) { 450 switch (*buf) { 451 452 case '\n': 453 case 014: /* form feed */ 454 cur = 1; 455 break; 456 457 case '\t': 458 cur = opt.tabsize * (1 + (cur - 1) / opt.tabsize) + 1; 459 break; 460 461 case 010: /* backspace */ 462 --cur; 463 break; 464 465 default: 466 ++cur; 467 break; 468 } /* end of switch */ 469 } /* end of for loop */ 470 return (cur); 471 } 472 473 int 474 count_spaces(int cur, char *buffer) 475 { 476 return (count_spaces_until(cur, buffer, NULL)); 477 } 478 479 void 480 diag4(int level, const char *msg, int a, int b) 481 { 482 if (level) 483 found_err = 1; 484 if (output == stdout) { 485 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no); 486 fprintf(stdout, msg, a, b); 487 fprintf(stdout, " */\n"); 488 } 489 else { 490 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no); 491 fprintf(stderr, msg, a, b); 492 fprintf(stderr, "\n"); 493 } 494 } 495 496 void 497 diag3(int level, const char *msg, int a) 498 { 499 if (level) 500 found_err = 1; 501 if (output == stdout) { 502 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no); 503 fprintf(stdout, msg, a); 504 fprintf(stdout, " */\n"); 505 } 506 else { 507 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no); 508 fprintf(stderr, msg, a); 509 fprintf(stderr, "\n"); 510 } 511 } 512 513 void 514 diag2(int level, const char *msg) 515 { 516 if (level) 517 found_err = 1; 518 if (output == stdout) { 519 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no); 520 fprintf(stdout, "%s", msg); 521 fprintf(stdout, " */\n"); 522 } 523 else { 524 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no); 525 fprintf(stderr, "%s", msg); 526 fprintf(stderr, "\n"); 527 } 528 } 529 530