1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #ifndef lint 8 static char sccsid[] = "@(#)io.c 5.4 (Berkeley) 04/29/87"; 9 #endif not lint 10 11 /*- 12 * Copyright (C) 1976 13 * by the 14 * Board of Trustees 15 * of the 16 * University of Illinois 17 * All rights reserved 18 * FILE NAME: 19 * io.c 20 * PURPOSE: 21 * Contains routines to handle i/o related stuff for indent. 22 * GLOBALS: 23 * None 24 * FUNCTIONS: 25 * dump_line 26 * fill_buffer 27 * pad_output 28 * count_spaces 29 * eqin 30 * cmp 31 * 32 */ 33 /*- 34 * 35 * Copyright (C) 1976 36 * by the 37 * Board of Trustees 38 * of the 39 * University of Illinois 40 * 41 * All rights reserved 42 * 43 * 44 * NAME: 45 * dump_line 46 * 47 * FUNCTION: 48 * Does the actual printing of the stored up line 49 * 50 * ALGORITHM: 51 * For each of the label, code, and comment sections which are used on 52 * this line: 53 * 54 * 1) Use pad_output to get the section aligned properly. 55 * 2) write the section 56 * 57 * The indentation level used for the code is set by ps.ind_level. After 58 * printing, ps.ind_level is set to ps.i_l_follow. 59 * 60 * An extra level of indentation is added if ps.ind_stmt is 1. After 61 * printing, ps.ind_stmt is set to 1 iff the line just printed has an 62 * unterminated, non-declaration statement. 63 * 64 * HISTORY: 65 * initial coding November 1976 D A Willcox of CAC 66 * 67 */ 68 #include "indent_globs.h"; 69 70 71 72 int ff = 014; /* used to write a form feed */ 73 int comment_open; 74 static paren_target; 75 76 dump_line() 77 { /* dump_line is the routine that actually 78 * effects the printing of the new source. 79 * It prints the label section, followed 80 * by the code section with the 81 * appropriate nesting level, followed by 82 * any comments */ 83 register int cur_col, 84 temp_col, 85 target_col; 86 87 if (ps.procname[0]) { 88 if (troff) 89 fprintf(output, ".Pr \"%s\"\n", ps.procname); 90 ps.ind_level = 0; 91 ps.procname[0] = 0; 92 } 93 if (s_code == e_code && s_lab == e_lab && s_com == e_com) { 94 if (suppress_blanklines>0) suppress_blanklines--; 95 else { 96 ps.bl_line = true; 97 n_real_blanklines++; 98 } 99 } 100 else if (!inhibit_formatting) { 101 suppress_blanklines = 0; 102 ps.bl_line = false; 103 if (prefix_blankline_requested) 104 if (swallow_optional_blanklines) { 105 if (n_real_blanklines == 1) 106 n_real_blanklines = 0; 107 } 108 else { 109 if (n_real_blanklines == 0) 110 n_real_blanklines = 1; 111 } 112 while (--n_real_blanklines >= 0) 113 putc('\n', output); 114 n_real_blanklines = 0; 115 if (ps.ind_level == 0) 116 ps.ind_stmt = 0; /* this is a class A kludge. dont do 117 * additional statement indentation if we 118 * are at bracket level 0 */ 119 120 if (e_lab != s_lab || e_code != s_code) 121 ++code_lines; /* keep count of lines with code */ 122 123 124 if (e_lab != s_lab) { /* print lab, if any */ 125 if (comment_open) { 126 comment_open = 0; 127 fprintf(output, ".*/\n"); 128 } 129 while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t')) 130 e_lab--; 131 cur_col = pad_output(1, compute_label_target()); 132 fprintf(output, "%.*s", e_lab - s_lab, s_lab); 133 cur_col = count_spaces(cur_col, s_lab); 134 } 135 else 136 cur_col = 1; /* there is no label section */ 137 138 ps.pcase = false; 139 140 if (s_code != e_code) { /* print code section, if any */ 141 register char *p; 142 143 if (comment_open) { 144 comment_open = 0; 145 fprintf(output, ".*/\n"); 146 } 147 target_col = compute_code_target(); 148 { 149 register i; 150 151 for (i = 0; i < ps.p_l_follow; i++) 152 if (ps.paren_indents[i] >= 0) 153 ps.paren_indents[i] = -(ps.paren_indents[i] + target_col); 154 } 155 cur_col = pad_output(cur_col, target_col); 156 for (p = s_code; p < e_code; p++) 157 if (*p == 0200) 158 fprintf(output, "%d", target_col * 7); 159 else 160 putc(*p, output); 161 cur_col = count_spaces(cur_col, s_code); 162 } 163 if (s_com != e_com) 164 if (troff) { 165 register char *p; 166 167 if (e_com[-1] == '/' && e_com[-2] == '*') 168 e_com -= 2; 169 while (e_com > s_com && e_com[-1] == ' ') 170 e_com--; 171 *e_com = 0; 172 p = s_com; 173 while (*p == ' ') 174 p++; 175 if (p[0] == '/' && p[1] == '*') 176 p += 2; 177 else if (p[0] == '*') 178 p += p[1] == '/' ? 2 : 1; 179 while (*p == ' ') 180 p++; 181 if (*p == 0) 182 goto inhibit_newline; 183 if (!comment_open) { 184 if ('a' <= *p && *p <= 'z') 185 *p = *p + 'A' - 'a'; 186 if (s_code != e_code || s_lab != e_lab) { 187 fprintf(output, "\\c\n./* %dp 1 %dp\n", 188 ps.com_col * 7, target_col * 7); 189 } 190 else 191 fprintf(output, "./* %dp 0 %dp\n", 192 ps.com_col * 7, target_col * 7); 193 } 194 comment_open = 1; 195 while (*p) { 196 if (*p == BACKSLASH) 197 putc(BACKSLASH, output); 198 putc(*p++, output); 199 } 200 } 201 else { /* print comment, if any */ 202 register target = ps.com_col; 203 register char *com_st = s_com; 204 205 target += ps.comment_delta; 206 while (target <= 0) 207 if (*s_com == ' ') 208 target++, s_com++; 209 else if (*s_com == '\t') 210 target = ((target - 1) & ~7) + 9, s_com++; 211 else 212 target = 1; 213 if (cur_col > target) { /* if comment cant fit on this 214 * line, put it on next line */ 215 putc('\n', output); 216 cur_col = 1; 217 ++ps.out_lines; 218 } 219 cur_col = pad_output(cur_col, target); 220 if (!ps.box_com) { 221 if (star_comment_cont && com_st[1] != '*') 222 if (com_st[1] == ' ' && com_st[0] == ' ') 223 com_st[1] = '*'; 224 else 225 fwrite(" * ", com_st[0] == '\t' ? 2 : com_st[0] == '*' ? 1 : 3, 1, output); 226 } 227 fwrite(com_st, e_com - com_st, 1, output); 228 ps.comment_delta = ps.n_comment_delta; 229 cur_col = count_spaces(cur_col, com_st); 230 ++ps.com_lines; /* count lines with comments */ 231 } 232 if (ps.use_ff) 233 putc('\014', output); 234 else 235 putc('\n', output); 236 inhibit_newline: 237 ++ps.out_lines; 238 if (ps.just_saw_decl == 1 && blanklines_after_declarations) { 239 prefix_blankline_requested = 1; 240 ps.just_saw_decl = 0; 241 } 242 else 243 prefix_blankline_requested = postfix_blankline_requested; 244 postfix_blankline_requested = 0; 245 } 246 ps.decl_on_line = ps.in_decl; /* if we are in the middle of a 247 * declaration, remember that fact 248 * for proper comment indentation */ 249 ps.ind_stmt = ps.in_stmt & ~ps.in_decl; /* next line should be 250 * indented if we have not 251 * completed this stmt and 252 * if we are not in the 253 * middle of a declaration */ 254 ps.use_ff = false; 255 ps.dumped_decl_indent = 0; 256 *(e_lab = s_lab) = '\0'; /* reset buffers */ 257 *(e_code = s_code) = '\0'; 258 *(e_com = s_com) = '\0'; 259 ps.ind_level = ps.i_l_follow; 260 ps.paren_level = ps.p_l_follow; 261 paren_target = -ps.paren_indents[ps.paren_level - 1]; 262 return; 263 }; 264 265 compute_code_target() { 266 register target_col = ps.ind_size * ps.ind_level + 1; 267 268 if (ps.paren_level) 269 if (!lineup_to_parens) 270 target_col += continuation_indent * ps.paren_level; 271 else { 272 register w; 273 register t = paren_target; 274 275 if ((w = count_spaces(t, s_code) - max_col) > 0 276 && count_spaces(target_col, s_code) <= max_col) { 277 t -= w + 1; 278 if (t > target_col) 279 target_col = t; 280 } 281 else 282 target_col = t; 283 } 284 else if (ps.ind_stmt) 285 target_col += continuation_indent; 286 return target_col; 287 } 288 289 compute_label_target() 290 { 291 return 292 ps.pcase ? (int) (case_ind * ps.ind_size) +1 293 : *s_lab == '#' ? 1 294 : ps.ind_size * (ps.ind_level - label_offset) +1; 295 } 296 297 298 /* 299 * Copyright (C) 1976 by the Board of Trustees of the University of 300 * Illinois 301 * 302 * All rights reserved 303 * 304 * 305 * NAME: fill_buffer 306 * 307 * FUNCTION: Reads one block of input into input_buffer 308 * 309 * HISTORY: initial coding November 1976 D A Willcox of CAC 1/7/77 310 * A Willcox of CAC Added check for switch back to partly full input 311 * buffer from temporary buffer 312 * 313 */ 314 int 315 fill_buffer() 316 { /* this routine reads stuff from the input */ 317 int count; 318 register char *p; 319 register int i; 320 register FILE *f = input; 321 322 if (bp_save != 0) { /* there is a partly filled input buffer 323 * left */ 324 buf_ptr = bp_save; /* dont read anything, just switch buffers */ 325 buf_end = be_save; 326 bp_save = be_save = 0; 327 if (buf_ptr < buf_end) 328 return; /* only return if there is really 329 * something in this buffer */ 330 } 331 p = in_buffer; 332 buf_ptr = p; 333 while ((*p++ = i = getc(f)) != EOF && i != '\n'); 334 if (i == EOF) { 335 p[-1] = ' '; 336 *p++ = '\n'; 337 had_eof = true; 338 } 339 buf_end = p; 340 if (p[-2] == '/' && p[-3] == '*') { 341 if (in_buffer[3] == 'I' && strncmp(in_buffer, "/**INDENT**", 11) == 0) 342 fill_buffer(); /* flush indent error message */ 343 else { 344 int com = 0; 345 346 p = in_buffer; 347 while (*p == ' ' || *p == '\t') 348 p++; 349 if (*p == '/' && p[1] == '*') { 350 p += 2; 351 while (*p == ' ' || *p == '\t') 352 p++; 353 if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E' 354 && p[4] == 'N' && p[5] == 'T') { 355 p += 6; 356 while (*p == ' ' || *p == '\t') 357 p++; 358 if (*p == '*') 359 com = 1; 360 else if (*p == 'O') 361 if (*++p == 'N') 362 p++, com = 1; 363 else if (*p == 'F' && *++p == 'F') 364 p++, com = 2; 365 while (*p == ' ' || *p == '\t') 366 p++; 367 if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) { 368 if (s_com != e_com || s_lab != e_lab || s_code != e_code) 369 dump_line(); 370 if (!(inhibit_formatting = com - 1)) { 371 n_real_blanklines = 0; 372 postfix_blankline_requested = 0; 373 prefix_blankline_requested = 0; 374 suppress_blanklines = 1; 375 } 376 } 377 } 378 } 379 } 380 } 381 if (inhibit_formatting) { 382 p = in_buffer; 383 do 384 putc(*p, output); 385 while (*p++ != '\n'); 386 } 387 return; 388 }; 389 390 /* 391 * Copyright (C) 1976 by the Board of Trustees of the University of 392 * Illinois 393 * 394 * All rights reserved 395 * 396 * 397 * NAME: pad_output 398 * 399 * FUNCTION: Writes tabs and spaces to move the current column up to the 400 * desired position. 401 * 402 * ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf. 403 * 404 * PARAMETERS: current integer The current column target 405 * nteger The desired column 406 * 407 * RETURNS: Integer value of the new column. (If current >= target, no 408 * action is taken, and current is returned. 409 * 410 * GLOBALS: None 411 * 412 * CALLS: write (sys) 413 * 414 * CALLED BY: dump_line 415 * 416 * HISTORY: initial coding November 1976 D A Willcox of CAC 417 * 418 */ 419 pad_output(current, target) /* writes tabs and blanks (if necessary) 420 * to get the current output position up 421 * to the target column */ 422 int current; /* the current column value */ 423 int target; /* position we want it at */ 424 { 425 register int curr; /* internal column pointer */ 426 register int tcur; 427 428 if (troff) 429 fprintf(output, "\\h'|%dp'", (target - 1) * 7); 430 else { 431 if (current >= target) 432 return (current); /* line is already long enough */ 433 curr = current; 434 while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) { 435 putc('\t', output); 436 curr = tcur; 437 } 438 while (curr++ < target) 439 putc(' ', output); /* pad with final blanks */ 440 } 441 return (target); 442 }; 443 444 /* 445 * Copyright (C) 1976 by the Board of Trustees of the University of 446 * Illinois 447 * 448 * All rights reserved 449 * 450 * 451 * NAME: count_spaces 452 * 453 * FUNCTION: Find out where printing of a given string will leave the current 454 * character position on output. 455 * 456 * ALGORITHM: Run thru input string and add appropriate values to current 457 * position. 458 * 459 * RETURNS: Integer value of position after printing "buffer" starting in 460 * column "current". 461 * 462 * HISTORY: initial coding November 1976 D A Willcox of CAC 463 * 464 */ 465 int 466 count_spaces(current, buffer) 467 468 /* 469 * this routine figures out where the character position will be after 470 * printing the text in buffer starting at column "current" 471 */ 472 int current; 473 char *buffer; 474 { 475 register char *buf; /* used to look thru buffer */ 476 register int cur; /* current character counter */ 477 478 cur = current; 479 480 for (buf = buffer; *buf != '\0'; ++buf) { 481 switch (*buf) { 482 483 case '\n': 484 case 014: /* form feed */ 485 cur = 1; 486 break; 487 488 case '\t': 489 cur = ((cur - 1) & tabmask) + tabsize + 1; 490 break; 491 492 case '': /* this is a backspace */ 493 --cur; 494 break; 495 496 default: 497 ++cur; 498 break; 499 } /* end of switch */ 500 } /* end of for loop */ 501 return (cur); 502 }; 503 504 int found_err; 505 diag(level, msg, a, b) 506 { 507 if (level) 508 found_err = 1; 509 if (output == stdout) { 510 fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no); 511 fprintf(stdout, msg, a, b); 512 fprintf(stdout, " */\n"); 513 } 514 else { 515 fprintf(stderr, "%s@%d: ", level == 0 ? "Warning" : "Error", line_no); 516 fprintf(stderr, msg, a, b); 517 fprintf(stderr, "\n"); 518 } 519 } 520