| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | */ |
| 7 | |
| 8 | #ifndef lint |
| 9 | char copyright[] = |
| 10 | "@(#) Copyright (c) 1980 Regents of the University of California.\n\ |
| 11 | All rights reserved.\n"; |
| 12 | #endif /* not lint */ |
| 13 | |
| 14 | #ifndef lint |
| 15 | static char sccsid[] = "@(#)fmt.c 5.10 (Berkeley) %G%"; |
| 16 | #endif /* not lint */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | #include <ctype.h> |
| 20 | |
| 21 | /* |
| 22 | * fmt -- format the concatenation of input files or standard input |
| 23 | * onto standard output. Designed for use with Mail ~| |
| 24 | * |
| 25 | * Syntax : fmt [ goal [ max ] ] [ name ... ] |
| 26 | * Authors: Kurt Shoens (UCB) 12/7/78; |
| 27 | * Liz Allen (UMCP) 2/24/83 [Addition of goal length concept]. |
| 28 | */ |
| 29 | |
| 30 | /* LIZ@UOM 6/18/85 -- Don't need LENGTH any more. |
| 31 | * #define LENGTH 72 Max line length in output |
| 32 | */ |
| 33 | #define NOSTR ((char *) 0) /* Null string pointer for lint */ |
| 34 | |
| 35 | /* LIZ@UOM 6/18/85 --New variables goal_length and max_length */ |
| 36 | #define GOAL_LENGTH 65 |
| 37 | #define MAX_LENGTH 75 |
| 38 | int goal_length; /* Target or goal line length in output */ |
| 39 | int max_length; /* Max line length in output */ |
| 40 | int pfx; /* Current leading blank count */ |
| 41 | int lineno; /* Current input line */ |
| 42 | int mark; /* Last place we saw a head line */ |
| 43 | |
| 44 | char *malloc(); /* for lint . . . */ |
| 45 | char *headnames[] = {"To", "Subject", "Cc", 0}; |
| 46 | |
| 47 | /* |
| 48 | * Drive the whole formatter by managing input files. Also, |
| 49 | * cause initialization of the output stuff and flush it out |
| 50 | * at the end. |
| 51 | */ |
| 52 | |
| 53 | main(argc, argv) |
| 54 | int argc; |
| 55 | char **argv; |
| 56 | { |
| 57 | register FILE *fi; |
| 58 | register int errs = 0; |
| 59 | int number; /* LIZ@UOM 6/18/85 */ |
| 60 | |
| 61 | goal_length = GOAL_LENGTH; |
| 62 | max_length = MAX_LENGTH; |
| 63 | setout(); |
| 64 | lineno = 1; |
| 65 | mark = -10; |
| 66 | /* |
| 67 | * LIZ@UOM 6/18/85 -- Check for goal and max length arguments |
| 68 | */ |
| 69 | if (argc > 1 && (1 == (sscanf(argv[1], "%d", &number)))) { |
| 70 | argv++; |
| 71 | argc--; |
| 72 | goal_length = number; |
| 73 | if (argc > 1 && (1 == (sscanf(argv[1], "%d", &number)))) { |
| 74 | argv++; |
| 75 | argc--; |
| 76 | max_length = number; |
| 77 | } |
| 78 | } |
| 79 | if (max_length <= goal_length) { |
| 80 | fprintf(stderr, "Max length must be greater than %s\n", |
| 81 | "goal length"); |
| 82 | exit(1); |
| 83 | } |
| 84 | if (argc < 2) { |
| 85 | fmt(stdin); |
| 86 | oflush(); |
| 87 | exit(0); |
| 88 | } |
| 89 | while (--argc) { |
| 90 | if ((fi = fopen(*++argv, "r")) == NULL) { |
| 91 | perror(*argv); |
| 92 | errs++; |
| 93 | continue; |
| 94 | } |
| 95 | fmt(fi); |
| 96 | fclose(fi); |
| 97 | } |
| 98 | oflush(); |
| 99 | exit(errs); |
| 100 | } |
| 101 | |
| 102 | /* |
| 103 | * Read up characters from the passed input file, forming lines, |
| 104 | * doing ^H processing, expanding tabs, stripping trailing blanks, |
| 105 | * and sending each line down for analysis. |
| 106 | */ |
| 107 | fmt(fi) |
| 108 | FILE *fi; |
| 109 | { |
| 110 | char linebuf[BUFSIZ], canonb[BUFSIZ]; |
| 111 | register char *cp, *cp2; |
| 112 | register int c, col; |
| 113 | |
| 114 | c = getc(fi); |
| 115 | while (c != EOF) { |
| 116 | /* |
| 117 | * Collect a line, doing ^H processing. |
| 118 | * Leave tabs for now. |
| 119 | */ |
| 120 | cp = linebuf; |
| 121 | while (c != '\n' && c != EOF && cp-linebuf < BUFSIZ-1) { |
| 122 | if (c == '\b') { |
| 123 | if (cp > linebuf) |
| 124 | cp--; |
| 125 | c = getc(fi); |
| 126 | continue; |
| 127 | } |
| 128 | if ((c < ' ' || c >= 0177) && c != '\t') { |
| 129 | c = getc(fi); |
| 130 | continue; |
| 131 | } |
| 132 | *cp++ = c; |
| 133 | c = getc(fi); |
| 134 | } |
| 135 | *cp = '\0'; |
| 136 | |
| 137 | /* |
| 138 | * Toss anything remaining on the input line. |
| 139 | */ |
| 140 | while (c != '\n' && c != EOF) |
| 141 | c = getc(fi); |
| 142 | |
| 143 | /* |
| 144 | * Expand tabs on the way to canonb. |
| 145 | */ |
| 146 | col = 0; |
| 147 | cp = linebuf; |
| 148 | cp2 = canonb; |
| 149 | while (c = *cp++) { |
| 150 | if (c != '\t') { |
| 151 | col++; |
| 152 | if (cp2-canonb < BUFSIZ-1) |
| 153 | *cp2++ = c; |
| 154 | continue; |
| 155 | } |
| 156 | do { |
| 157 | if (cp2-canonb < BUFSIZ-1) |
| 158 | *cp2++ = ' '; |
| 159 | col++; |
| 160 | } while ((col & 07) != 0); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * Swipe trailing blanks from the line. |
| 165 | */ |
| 166 | for (cp2--; cp2 >= canonb && *cp2 == ' '; cp2--) |
| 167 | ; |
| 168 | *++cp2 = '\0'; |
| 169 | prefix(canonb); |
| 170 | if (c != EOF) |
| 171 | c = getc(fi); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Take a line devoid of tabs and other garbage and determine its |
| 177 | * blank prefix. If the indent changes, call for a linebreak. |
| 178 | * If the input line is blank, echo the blank line on the output. |
| 179 | * Finally, if the line minus the prefix is a mail header, try to keep |
| 180 | * it on a line by itself. |
| 181 | */ |
| 182 | prefix(line) |
| 183 | char line[]; |
| 184 | { |
| 185 | register char *cp, **hp; |
| 186 | register int np, h; |
| 187 | |
| 188 | if (strlen(line) == 0) { |
| 189 | oflush(); |
| 190 | putchar('\n'); |
| 191 | return; |
| 192 | } |
| 193 | for (cp = line; *cp == ' '; cp++) |
| 194 | ; |
| 195 | np = cp - line; |
| 196 | |
| 197 | /* |
| 198 | * The following horrible expression attempts to avoid linebreaks |
| 199 | * when the indent changes due to a paragraph. |
| 200 | */ |
| 201 | if (np != pfx && (np > pfx || abs(pfx-np) > 8)) |
| 202 | oflush(); |
| 203 | if (h = ishead(cp)) |
| 204 | oflush(), mark = lineno; |
| 205 | if (lineno - mark < 3 && lineno - mark > 0) |
| 206 | for (hp = &headnames[0]; *hp != (char *) 0; hp++) |
| 207 | if (ispref(*hp, cp)) { |
| 208 | h = 1; |
| 209 | oflush(); |
| 210 | break; |
| 211 | } |
| 212 | if (!h && (h = (*cp == '.'))) |
| 213 | oflush(); |
| 214 | pfx = np; |
| 215 | if (h) |
| 216 | pack(cp); |
| 217 | else split(cp); |
| 218 | if (h) |
| 219 | oflush(); |
| 220 | lineno++; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * Split up the passed line into output "words" which are |
| 225 | * maximal strings of non-blanks with the blank separation |
| 226 | * attached at the end. Pass these words along to the output |
| 227 | * line packer. |
| 228 | */ |
| 229 | split(line) |
| 230 | char line[]; |
| 231 | { |
| 232 | register char *cp, *cp2; |
| 233 | char word[BUFSIZ]; |
| 234 | int wordl; /* LIZ@UOM 6/18/85 */ |
| 235 | |
| 236 | cp = line; |
| 237 | while (*cp) { |
| 238 | cp2 = word; |
| 239 | wordl = 0; /* LIZ@UOM 6/18/85 */ |
| 240 | |
| 241 | /* |
| 242 | * Collect a 'word,' allowing it to contain escaped white |
| 243 | * space. |
| 244 | */ |
| 245 | while (*cp && *cp != ' ') { |
| 246 | if (*cp == '\\' && isspace(cp[1])) |
| 247 | *cp2++ = *cp++; |
| 248 | *cp2++ = *cp++; |
| 249 | wordl++;/* LIZ@UOM 6/18/85 */ |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * Guarantee a space at end of line. Two spaces after end of |
| 254 | * sentence punctuation. |
| 255 | */ |
| 256 | if (*cp == '\0') { |
| 257 | *cp2++ = ' '; |
| 258 | if (index(".:!", cp[-1])) |
| 259 | *cp2++ = ' '; |
| 260 | } |
| 261 | while (*cp == ' ') |
| 262 | *cp2++ = *cp++; |
| 263 | *cp2 = '\0'; |
| 264 | /* |
| 265 | * LIZ@UOM 6/18/85 pack(word); |
| 266 | */ |
| 267 | pack(word, wordl); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * Output section. |
| 273 | * Build up line images from the words passed in. Prefix |
| 274 | * each line with correct number of blanks. The buffer "outbuf" |
| 275 | * contains the current partial line image, including prefixed blanks. |
| 276 | * "outp" points to the next available space therein. When outp is NOSTR, |
| 277 | * there ain't nothing in there yet. At the bottom of this whole mess, |
| 278 | * leading tabs are reinserted. |
| 279 | */ |
| 280 | char outbuf[BUFSIZ]; /* Sandbagged output line image */ |
| 281 | char *outp; /* Pointer in above */ |
| 282 | |
| 283 | /* |
| 284 | * Initialize the output section. |
| 285 | */ |
| 286 | setout() |
| 287 | { |
| 288 | outp = NOSTR; |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * Pack a word onto the output line. If this is the beginning of |
| 293 | * the line, push on the appropriately-sized string of blanks first. |
| 294 | * If the word won't fit on the current line, flush and begin a new |
| 295 | * line. If the word is too long to fit all by itself on a line, |
| 296 | * just give it its own and hope for the best. |
| 297 | * |
| 298 | * LIZ@UOM 6/18/85 -- If the new word will fit in at less than the |
| 299 | * goal length, take it. If not, then check to see if the line |
| 300 | * will be over the max length; if so put the word on the next |
| 301 | * line. If not, check to see if the line will be closer to the |
| 302 | * goal length with or without the word and take it or put it on |
| 303 | * the next line accordingly. |
| 304 | */ |
| 305 | |
| 306 | /* |
| 307 | * LIZ@UOM 6/18/85 -- pass in the length of the word as well |
| 308 | * pack(word) |
| 309 | * char word[]; |
| 310 | */ |
| 311 | pack(word,wl) |
| 312 | char word[]; |
| 313 | int wl; |
| 314 | { |
| 315 | register char *cp; |
| 316 | register int s, t; |
| 317 | |
| 318 | if (outp == NOSTR) |
| 319 | leadin(); |
| 320 | /* |
| 321 | * LIZ@UOM 6/18/85 -- change condition to check goal_length; s is the |
| 322 | * length of the line before the word is added; t is now the length |
| 323 | * of the line after the word is added |
| 324 | * t = strlen(word); |
| 325 | * if (t+s <= LENGTH) |
| 326 | */ |
| 327 | s = outp - outbuf; |
| 328 | t = wl + s; |
| 329 | if ((t <= goal_length) || |
| 330 | ((t <= max_length) && (t - goal_length <= goal_length - s))) { |
| 331 | /* |
| 332 | * In like flint! |
| 333 | */ |
| 334 | for (cp = word; *cp; *outp++ = *cp++); |
| 335 | return; |
| 336 | } |
| 337 | if (s > pfx) { |
| 338 | oflush(); |
| 339 | leadin(); |
| 340 | } |
| 341 | for (cp = word; *cp; *outp++ = *cp++); |
| 342 | } |
| 343 | |
| 344 | /* |
| 345 | * If there is anything on the current output line, send it on |
| 346 | * its way. Set outp to NOSTR to indicate the absence of the current |
| 347 | * line prefix. |
| 348 | */ |
| 349 | oflush() |
| 350 | { |
| 351 | if (outp == NOSTR) |
| 352 | return; |
| 353 | *outp = '\0'; |
| 354 | tabulate(outbuf); |
| 355 | outp = NOSTR; |
| 356 | } |
| 357 | |
| 358 | /* |
| 359 | * Take the passed line buffer, insert leading tabs where possible, and |
| 360 | * output on standard output (finally). |
| 361 | */ |
| 362 | tabulate(line) |
| 363 | char line[]; |
| 364 | { |
| 365 | register char *cp; |
| 366 | register int b, t; |
| 367 | |
| 368 | /* |
| 369 | * Toss trailing blanks in the output line. |
| 370 | */ |
| 371 | cp = line + strlen(line) - 1; |
| 372 | while (cp >= line && *cp == ' ') |
| 373 | cp--; |
| 374 | *++cp = '\0'; |
| 375 | |
| 376 | /* |
| 377 | * Count the leading blank space and tabulate. |
| 378 | */ |
| 379 | for (cp = line; *cp == ' '; cp++) |
| 380 | ; |
| 381 | b = cp-line; |
| 382 | t = b >> 3; |
| 383 | b &= 07; |
| 384 | if (t > 0) |
| 385 | do |
| 386 | putc('\t', stdout); |
| 387 | while (--t); |
| 388 | if (b > 0) |
| 389 | do |
| 390 | putc(' ', stdout); |
| 391 | while (--b); |
| 392 | while (*cp) |
| 393 | putc(*cp++, stdout); |
| 394 | putc('\n', stdout); |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * Initialize the output line with the appropriate number of |
| 399 | * leading blanks. |
| 400 | */ |
| 401 | leadin() |
| 402 | { |
| 403 | register int b; |
| 404 | register char *cp; |
| 405 | |
| 406 | for (b = 0, cp = outbuf; b < pfx; b++) |
| 407 | *cp++ = ' '; |
| 408 | outp = cp; |
| 409 | } |
| 410 | |
| 411 | /* |
| 412 | * Save a string in dynamic space. |
| 413 | * This little goodie is needed for |
| 414 | * a headline detector in head.c |
| 415 | */ |
| 416 | char * |
| 417 | savestr(str) |
| 418 | char str[]; |
| 419 | { |
| 420 | register char *top; |
| 421 | |
| 422 | top = malloc(strlen(str) + 1); |
| 423 | if (top == NOSTR) { |
| 424 | fprintf(stderr, "fmt: Ran out of memory\n"); |
| 425 | exit(1); |
| 426 | } |
| 427 | strcpy(top, str); |
| 428 | return (top); |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Is s1 a prefix of s2?? |
| 433 | */ |
| 434 | ispref(s1, s2) |
| 435 | register char *s1, *s2; |
| 436 | { |
| 437 | |
| 438 | while (*s1++ == *s2) |
| 439 | ; |
| 440 | return (*s1 == '\0'); |
| 441 | } |