1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * Copyright (c) 1976 Board of Trustees of the University of Illinois. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms are permitted 7 * provided that this notice is preserved and that due credit is given 8 * to the University of California at Berkeley and the University of 9 * Illinois at Urbana. The name of either University may not be used 10 * to endorse or promote products derived from this software without 11 * specific prior written permission. This software is provided 12 * ``as is'' without express or implied warranty. 13 */ 14 15 #ifndef lint 16 static char sccsid[] = "@(#)io.c 5.6 (Berkeley) 03/22/88"; 17 #endif /* not lint */ 18 19 /* 20 * FILE NAME: 21 * io.c 22 * PURPOSE: 23 * Contains routines to handle i/o related stuff for indent. 24 * GLOBALS: 25 * None 26 * FUNCTIONS: 27 * dump_line 28 * fill_buffer 29 * pad_output 30 * count_spaces 31 * eqin 32 * cmp 33 * 34 */ 35 /*- 36 * 37 * Copyright (C) 1976 38 * by the 39 * Board of Trustees 40 * of the 41 * University of Illinois 42 * 43 * All rights reserved 44 * 45 * 46 * NAME: 47 * dump_line 48 * 49 * FUNCTION: 50 * Does the actual printing of the stored up line 51 * 52 * ALGORITHM: 53 * For each of the label, code, and comment sections which are used on 54 * this line: 55 * 56 * 1) Use pad_output to get the section aligned properly. 57 * 2) write the section 58 * 59 * The indentation level used for the code is set by ps.ind_level. After 60 * printing, ps.ind_level is set to ps.i_l_follow. 61 * 62 * An extra level of indentation is added if ps.ind_stmt is 1. After 63 * printing, ps.ind_stmt is set to 1 iff the line just printed has an 64 * unterminated, non-declaration statement. 65 * 66 * HISTORY: 67 * initial coding November 1976 D A Willcox of CAC 68 * 69 */ 70 #include "indent_globs.h" 71 72 73 74 int ff = 014; /* used to write a form feed */ 75 int comment_open; 76 static paren_target; 77 78 dump_line() 79 { /* dump_line is the routine that actually 80 * effects the printing of the new source. 81 * It prints the label section, followed 82 * by the code section with the 83 * appropriate nesting level, followed by 84 * any comments */ 85 register int cur_col, 86 temp_col, 87 target_col; 88 89 if (ps.procname[0]) { 90 if (troff) 91 fprintf(output, ".Pr \"%s\"\n", ps.procname); 92 ps.ind_level = 0; 93 ps.procname[0] = 0; 94 } 95 if (s_code == e_code && s_lab == e_lab && s_com == e_com) { 96 if (suppress_blanklines>0) suppress_blanklines--; 97 else { 98 ps.bl_line = true; 99 n_real_blanklines++; 100 } 101 } 102 else if (!inhibit_formatting) { 103 suppress_blanklines = 0; 104 ps.bl_line = false; 105 if (prefix_blankline_requested) 106 if (swallow_optional_blanklines) { 107 if (n_real_blanklines == 1) 108 n_real_blanklines = 0; 109 } 110 else { 111 if (n_real_blanklines == 0) 112 n_real_blanklines = 1; 113 } 114 while (--n_real_blanklines >= 0) 115 putc('\n', output); 116 n_real_blanklines = 0; 117 if (ps.ind_level == 0) 118 ps.ind_stmt = 0; /* this is a class A kludge. dont do 119 * additional statement indentation if we 120 * are at bracket level 0 */ 121 122 if (e_lab != s_lab || e_code != s_code) 123 ++code_lines; /* keep count of lines with code */ 124 125 126 if (e_lab != s_lab) { /* print lab, if any */ 127 if (comment_open) { 128 comment_open = 0; 129 fprintf(output, ".*/\n"); 130 } 131 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 132 e_lab--; 133 cur_col = pad_output(1, compute_label_target()); 134 fprintf(output, "%.*s", e_lab - s_lab, s_lab); 135 cur_col = count_spaces(cur_col, s_lab); 136 } 137 else 138 cur_col = 1; /* there is no label section */ 139 140 ps.pcase = false; 141 142 if (s_code != e_code) { /* print code section, if any */ 143 register char *p; 144 145 if (comment_open) { 146 comment_open = 0; 147 fprintf(output, ".*/\n"); 148 } 149 target_col = compute_code_target(); 150 { 151 register i; 152 153 for (i = 0; i < ps.p_l_follow; i++) 154 if (ps.paren_indents[i] >= 0) 155 ps.paren_indents[i] = -(ps.paren_indents[i] + target_col); 156 } 157 cur_col = pad_output(cur_col, target_col); 158 for (p = s_code; p < e_code; p++) 159 if (*p == (char)0200) 160 fprintf(output, "%d", target_col * 7); 161 else 162 putc(*p, output); 163 cur_col = count_spaces(cur_col, s_code); 164 } 165 if (s_com != e_com) 166 if (troff) { 167 register char *p; 168 169 if (e_com[-1] == '/' && e_com[-2] == '*') 170 e_com -= 2; 171 while (e_com > s_com && e_com[-1] == ' ') 172 e_com--; 173 *e_com = 0; 174 p = s_com; 175 while (*p == ' ') 176 p++; 177 if (p[0] == '/' && p[1] == '*') 178 p += 2; 179 else if (p[0] == '*') 180 p += p[1] == '/' ? 2 : 1; 181 while (*p == ' ') 182 p++; 183 if (*p == 0) 184 goto inhibit_newline; 185 if (!comment_open) { 186 if ('a' <= *p && *p <= 'z') 187 *p = *p + 'A' - 'a'; 188 if (s_code != e_code || s_lab != e_lab) { 189 fprintf(output, "\\c\n./* %dp 1 %dp\n", 190 ps.com_col * 7, target_col * 7); 191 } 192 else 193 fprintf(output, "./* %dp 0 %dp\n", 194 ps.com_col * 7, target_col * 7); 195 } 196 comment_open = 1; 197 while (*p) { 198 if (*p == BACKSLASH) 199 putc(BACKSLASH, output); 200 putc(*p++, output); 201 } 202 } 203 else { /* print comment, if any */ 204 register target = ps.com_col; 205 register char *com_st = s_com; 206 207 target += ps.comment_delta; 208 while (target <= 0) 209 if (*s_com == ' ') 210 target++, s_com++; 211 else if (*s_com == '\t') 212 target = ((target - 1) & ~7) + 9, s_com++; 213 else 214 target = 1; 215 if (cur_col > target) { /* if comment cant fit on this 216 * line, put it on next line */ 217 putc('\n', output); 218 cur_col = 1; 219 ++ps.out_lines; 220 } 221 cur_col = pad_output(cur_col, target); 222 if (!ps.box_com) { 223 if (star_comment_cont && com_st[1] != '*') 224 if (com_st[1] == ' ' && com_st[0] == ' ') 225 com_st[1] = '*'; 226 else 227 fwrite(" * ", com_st[0] == '\t' ? 2 : com_st[0] == '*' ? 1 : 3, 1, output); 228 } 229 fwrite(com_st, e_com - com_st, 1, output); 230 ps.comment_delta = ps.n_comment_delta; 231 cur_col = count_spaces(cur_col, com_st); 232 ++ps.com_lines; /* count lines with comments */ 233 } 234 if (ps.use_ff) 235 putc('\014', output); 236 else 237 putc('\n', output); 238 inhibit_newline: 239 ++ps.out_lines; 240 if (ps.just_saw_decl == 1 && blanklines_after_declarations) { 241 prefix_blankline_requested = 1; 242 ps.just_saw_decl = 0; 243 } 244 else 245 prefix_blankline_requested = postfix_blankline_requested; 246 postfix_blankline_requested = 0; 247 } 248 ps.decl_on_line = ps.in_decl; /* if we are in the middle of a 249 * declaration, remember that fact 250 * for proper comment indentation */ 251 ps.ind_stmt = ps.in_stmt & ~ps.in_decl; /* next line should be 252 * indented if we have not 253 * completed this stmt and 254 * if we are not in the 255 * middle of a declaration */ 256 ps.use_ff = false; 257 ps.dumped_decl_indent = 0; 258 *(e_lab = s_lab) = '\0'; /* reset buffers */ 259 *(e_code = s_code) = '\0'; 260 *(e_com = s_com) = '\0'; 261 ps.ind_level = ps.i_l_follow; 262 ps.paren_level = ps.p_l_follow; 263 paren_target = -ps.paren_indents[ps.paren_level - 1]; 264 return; 265 }; 266 267 compute_code_target() { 268 register target_col = ps.ind_size * ps.ind_level + 1; 269 270 if (ps.paren_level) 271 if (!lineup_to_parens) 272 target_col += continuation_indent * ps.paren_level; 273 else { 274 register w; 275 register t = paren_target; 276 277 if ((w = count_spaces(t, s_code) - max_col) > 0 278 && count_spaces(target_col, s_code) <= max_col) { 279 t -= w + 1; 280 if (t > target_col) 281 target_col = t; 282 } 283 else 284 target_col = t; 285 } 286 else if (ps.ind_stmt) 287 target_col += continuation_indent; 288 return target_col; 289 } 290 291 compute_label_target() 292 { 293 return 294 ps.pcase ? (int) (case_ind * ps.ind_size) +1 295 : *s_lab == '#' ? 1 296 : ps.ind_size * (ps.ind_level - label_offset) +1; 297 } 298 299 300 /* 301 * Copyright (C) 1976 by the Board of Trustees of the University of 302 * Illinois 303 * 304 * All rights reserved 305 * 306 * 307 * NAME: fill_buffer 308 * 309 * FUNCTION: Reads one block of input into input_buffer 310 * 311 * HISTORY: initial coding November 1976 D A Willcox of CAC 1/7/77 312 * A Willcox of CAC Added check for switch back to partly full input 313 * buffer from temporary buffer 314 * 315 */ 316 int 317 fill_buffer() 318 { /* this routine reads stuff from the input */ 319 int count; 320 register char *p; 321 register int i; 322 register FILE *f = input; 323 324 if (bp_save != 0) { /* there is a partly filled input buffer 325 * left */ 326 buf_ptr = bp_save; /* dont read anything, just switch buffers */ 327 buf_end = be_save; 328 bp_save = be_save = 0; 329 if (buf_ptr < buf_end) 330 return; /* only return if there is really 331 * something in this buffer */ 332 } 333 p = in_buffer; 334 buf_ptr = p; 335 while ((*p++ = i = getc(f)) != EOF && i != '\n'); 336 if (i == EOF) { 337 p[-1] = ' '; 338 *p++ = '\n'; 339 had_eof = true; 340 } 341 buf_end = p; 342 if (p[-2] == '/' && p[-3] == '*') { 343 if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0) 344 fill_buffer(); /* flush indent error message */ 345 else { 346 int com = 0; 347 348 p = in_buffer; 349 while (*p == ' ' || *p == '\t') 350 p++; 351 if (*p == '/' && p[1] == '*') { 352 p += 2; 353 while (*p == ' ' || *p == '\t') 354 p++; 355 if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E' 356 && p[4] == 'N' && p[5] == 'T') { 357 p += 6; 358 while (*p == ' ' || *p == '\t') 359 p++; 360 if (*p == '*') 361 com = 1; 362 else if (*p == 'O') 363 if (*++p == 'N') 364 p++, com = 1; 365 else if (*p == 'F' && *++p == 'F') 366 p++, com = 2; 367 while (*p == ' ' || *p == '\t') 368 p++; 369 if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) { 370 if (s_com != e_com || s_lab != e_lab || s_code != e_code) 371 dump_line(); 372 if (!(inhibit_formatting = com - 1)) { 373 n_real_blanklines = 0; 374 postfix_blankline_requested = 0; 375 prefix_blankline_requested = 0; 376 suppress_blanklines = 1; 377 } 378 } 379 } 380 } 381 } 382 } 383 if (inhibit_formatting) { 384 p = in_buffer; 385 do 386 putc(*p, output); 387 while (*p++ != '\n'); 388 } 389 return; 390 }; 391 392 /* 393 * Copyright (C) 1976 by the Board of Trustees of the University of 394 * Illinois 395 * 396 * All rights reserved 397 * 398 * 399 * NAME: pad_output 400 * 401 * FUNCTION: Writes tabs and spaces to move the current column up to the 402 * desired position. 403 * 404 * ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf. 405 * 406 * PARAMETERS: current integer The current column target 407 * nteger The desired column 408 * 409 * RETURNS: Integer value of the new column. (If current >= target, no 410 * action is taken, and current is returned. 411 * 412 * GLOBALS: None 413 * 414 * CALLS: write (sys) 415 * 416 * CALLED BY: dump_line 417 * 418 * HISTORY: initial coding November 1976 D A Willcox of CAC 419 * 420 */ 421 pad_output(current, target) /* writes tabs and blanks (if necessary) 422 * to get the current output position up 423 * to the target column */ 424 int current; /* the current column value */ 425 int target; /* position we want it at */ 426 { 427 register int curr; /* internal column pointer */ 428 register int tcur; 429 430 if (troff) 431 fprintf(output, "\\h'|%dp'", (target - 1) * 7); 432 else { 433 if (current >= target) 434 return (current); /* line is already long enough */ 435 curr = current; 436 while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) { 437 putc('\t', output); 438 curr = tcur; 439 } 440 while (curr++ < target) 441 putc(' ', output); /* pad with final blanks */ 442 } 443 return (target); 444 }; 445 446 /* 447 * Copyright (C) 1976 by the Board of Trustees of the University of 448 * Illinois 449 * 450 * All rights reserved 451 * 452 * 453 * NAME: count_spaces 454 * 455 * FUNCTION: Find out where printing of a given string will leave the current 456 * character position on output. 457 * 458 * ALGORITHM: Run thru input string and add appropriate values to current 459 * position. 460 * 461 * RETURNS: Integer value of position after printing "buffer" starting in 462 * column "current". 463 * 464 * HISTORY: initial coding November 1976 D A Willcox of CAC 465 * 466 */ 467 int 468 count_spaces(current, buffer) 469 470 /* 471 * this routine figures out where the character position will be after 472 * printing the text in buffer starting at column "current" 473 */ 474 int current; 475 char *buffer; 476 { 477 register char *buf; /* used to look thru buffer */ 478 register int cur; /* current character counter */ 479 480 cur = current; 481 482 for (buf = buffer; *buf != '\0'; ++buf) { 483 switch (*buf) { 484 485 case '\n': 486 case 014: /* form feed */ 487 cur = 1; 488 break; 489 490 case '\t': 491 cur = ((cur - 1) & tabmask) + tabsize + 1; 492 break; 493 494 case '': /* this is a backspace */ 495 --cur; 496 break; 497 498 default: 499 ++cur; 500 break; 501 } /* end of switch */ 502 } /* end of for loop */ 503 return (cur); 504 }; 505 506 int found_err; 507 diag(level, msg, a, b) 508 { 509 if (level) 510 found_err = 1; 511 if (output == stdout) { 512 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no); 513 fprintf(stdout, msg, a, b); 514 fprintf(stdout, " */\n"); 515 } 516 else { 517 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no); 518 fprintf(stderr, msg, a, b); 519 fprintf(stderr, "\n"); 520 } 521 } 522