| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: quine.c,v 1.1 1999/04/28 19:58:07 mdw Exp $ |
| 4 | * |
| 5 | * Output a program's source code as a quine file |
| 6 | * |
| 7 | * (c) 1999 Mark Wooding |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of Quine |
| 13 | * |
| 14 | * Quine is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License as published by |
| 16 | * the Free Software Foundation; either version 2 of the License, or |
| 17 | * (at your option) any later version. |
| 18 | * |
| 19 | * Quine is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 22 | * GNU General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU General Public License |
| 25 | * along with Quine; if not, write to the Free Software Foundation, |
| 26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 27 | */ |
| 28 | |
| 29 | /*----- Revision history --------------------------------------------------* |
| 30 | * |
| 31 | * $Log: quine.c,v $ |
| 32 | * Revision 1.1 1999/04/28 19:58:07 mdw |
| 33 | * Initial revision |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | /*----- Header files ------------------------------------------------------*/ |
| 38 | |
| 39 | /* --- ANSI headers --- */ |
| 40 | |
| 41 | #include <ctype.h> |
| 42 | #include <errno.h> |
| 43 | #include <stdarg.h> |
| 44 | #include <stdio.h> |
| 45 | #include <stdlib.h> |
| 46 | #include <string.h> |
| 47 | |
| 48 | /* --- POSIX headers --- */ |
| 49 | |
| 50 | #ifndef QUINE_PORTABLE |
| 51 | #include <sys/types.h> |
| 52 | #include <sys/stat.h> |
| 53 | #endif |
| 54 | |
| 55 | /* --- Local headers --- */ |
| 56 | |
| 57 | #include "mdwopt.h" |
| 58 | #include "quine.h" |
| 59 | |
| 60 | /*----- Main code ---------------------------------------------------------*/ |
| 61 | |
| 62 | /* --- @die@ --- * |
| 63 | * |
| 64 | * Arguments: @const char *f@ = a @printf@-style format string |
| 65 | * @...@ = other arguments |
| 66 | * |
| 67 | * Returns: Never. |
| 68 | * |
| 69 | * Use: Reports an error and hari-kiris. Like @moan@ above, only |
| 70 | * more permanent. |
| 71 | */ |
| 72 | |
| 73 | void die(const char *f, ...) |
| 74 | { |
| 75 | va_list ap; |
| 76 | va_start(ap, f); |
| 77 | fprintf(stderr, "%s: ", optprog); |
| 78 | vfprintf(stderr, f, ap); |
| 79 | va_end(ap); |
| 80 | putc('\n', stderr); |
| 81 | exit(EXIT_FAILURE); |
| 82 | } |
| 83 | |
| 84 | /* --- @quine__banner@ --- * |
| 85 | * |
| 86 | * Arguments: @FILE *fp@ = file to write on |
| 87 | * |
| 88 | * Returns: --- |
| 89 | * |
| 90 | * Use: Writes a banner to the given file. |
| 91 | */ |
| 92 | |
| 93 | static void quine__banner(FILE *fp) |
| 94 | { |
| 95 | fprintf(fp, "%s quine generator v. 1.1\n", optprog); |
| 96 | } |
| 97 | |
| 98 | /* --- @quine__usage@ --- * |
| 99 | * |
| 100 | * Arguments: @FILE *fp@ = file to write on |
| 101 | * |
| 102 | * Returns: --- |
| 103 | * |
| 104 | * Use: Writes a usage note to the given file. |
| 105 | */ |
| 106 | |
| 107 | static void quine__usage(FILE *fp) |
| 108 | { |
| 109 | fprintf(fp, "Usage: %s [-hv0n] [-f FILE] [FILE...]\n", optprog); |
| 110 | } |
| 111 | |
| 112 | /* --- @quine__help@ --- * |
| 113 | * |
| 114 | * Arguments: @FILE *fp@ = file to write on |
| 115 | * |
| 116 | * Returns: --- |
| 117 | * |
| 118 | * Use: Writes a help message to the given file. |
| 119 | */ |
| 120 | |
| 121 | static void quine__help(FILE *fp) |
| 122 | { |
| 123 | quine__banner(fp); |
| 124 | putc('\n', fp); |
| 125 | quine__usage(fp); |
| 126 | putc('\n', fp); |
| 127 | fputs( |
| 128 | "Given a list of source files, constructs a C source file which will write\n" |
| 129 | "the sources, and itself, when requested. In this way, it is easy to\n" |
| 130 | "create programs which contain their own source distributions, thus\n" |
| 131 | "fulfilling the requirements of the GNU General Public License with a\n" |
| 132 | "single binary program.\n" |
| 133 | "\n" |
| 134 | "The following options are provided:\n" |
| 135 | "\n" |
| 136 | "-h, --help\t\tdisplay this help message\n" |
| 137 | "-v, --version\t\tshow the program's version number\n" |
| 138 | "-0, --null\t\tread null terminated filenames\n" |
| 139 | "-l, --qqlib\t\tused while bootstrapping `quine'\n" |
| 140 | "-f, --file=FILE\t\tread filenames from FILE\n" |
| 141 | "-o, --output=FILE\twrite output quine data to FILE\n" |
| 142 | "-q, --quine\t\tbuild `quine's source distribution\n" |
| 143 | "-Q, --quine-dump\twrite `quine's source code to standard output\n", |
| 144 | fp); |
| 145 | } |
| 146 | |
| 147 | /* --- @quine__readLine@ --- * |
| 148 | * |
| 149 | * Arguments: @FILE *fp@ = pointer to input file |
| 150 | * @char **p@ = address of pointer to set up |
| 151 | * @size_t *sz@ = address of array length |
| 152 | * @const char *delim@ = array of delimiters |
| 153 | * |
| 154 | * Returns: Pointer to allocated line if all OK, otherwise zero. |
| 155 | * |
| 156 | * Use: Reads a line of input from the file. |
| 157 | */ |
| 158 | |
| 159 | static char *quine__readLine(FILE *fp, char **p, size_t *sz, |
| 160 | const char *delim) |
| 161 | { |
| 162 | size_t len = 0; |
| 163 | char *q; |
| 164 | const char *d; |
| 165 | int ch; |
| 166 | |
| 167 | /* --- If I couldn't make my initial buffer, there's no hope --- */ |
| 168 | |
| 169 | if (!*p) { |
| 170 | *sz = 64; |
| 171 | *p = malloc(*sz); |
| 172 | if (!*p) |
| 173 | die("out of memory"); |
| 174 | } |
| 175 | |
| 176 | /* --- Skip over initial delimiters --- */ |
| 177 | |
| 178 | skip_delims: |
| 179 | ch = getc(fp); |
| 180 | if (ch == EOF) |
| 181 | return (0); |
| 182 | d = delim; |
| 183 | do { |
| 184 | if (ch == (unsigned char)*d) |
| 185 | goto skip_delims; |
| 186 | } while (*d++); |
| 187 | |
| 188 | /* --- Read characters into the buffer --- */ |
| 189 | |
| 190 | for (;;) { |
| 191 | |
| 192 | /* --- If not enough buffer space, double the buffer --- * |
| 193 | * |
| 194 | * The plus-one is for the null byte on the end. |
| 195 | */ |
| 196 | |
| 197 | if (len + 1 >= *sz) { |
| 198 | *sz <<= 1; |
| 199 | q = realloc(p, *sz); |
| 200 | if (!q) |
| 201 | die("out of memory"); |
| 202 | *p = q; |
| 203 | } |
| 204 | (*p)[len++] = ch; |
| 205 | |
| 206 | /* --- Read and check the next byte --- */ |
| 207 | |
| 208 | ch = getc(fp); |
| 209 | if (ch == EOF) |
| 210 | goto done; |
| 211 | d = delim; |
| 212 | do { |
| 213 | if (ch == (unsigned char)*d) |
| 214 | goto done; |
| 215 | } while (*d++); |
| 216 | } |
| 217 | |
| 218 | /* --- Terminate the string and return --- */ |
| 219 | |
| 220 | done: |
| 221 | (*p)[len++] = 0; |
| 222 | return (*p); |
| 223 | } |
| 224 | |
| 225 | /* --- @quine__doFile@ --- * |
| 226 | * |
| 227 | * Arguments: @FILE *fp@ = output file handle |
| 228 | * @FILE *ifp@ = input file |
| 229 | * |
| 230 | * Returns: --- |
| 231 | * |
| 232 | * Use: Outputs the contents of a quine block containing the given |
| 233 | * file. |
| 234 | */ |
| 235 | |
| 236 | static void quine__doFile(FILE *fp, FILE *ifp) |
| 237 | { |
| 238 | char *p; |
| 239 | char buff[80]; |
| 240 | int ch; |
| 241 | |
| 242 | for (;;) { |
| 243 | p = buff; |
| 244 | ch = getc(ifp); |
| 245 | if (ch == EOF) |
| 246 | break; |
| 247 | for (;;) { |
| 248 | *p++ = ch; |
| 249 | if (ch == '\n' || p >= buff + sizeof(buff)) |
| 250 | break; |
| 251 | ch = getc(ifp); |
| 252 | } |
| 253 | fputc('\"', fp); |
| 254 | for (p = buff; p < buff + sizeof(buff); p++) { |
| 255 | switch (*p) { |
| 256 | case '\"': fputs("%q", fp); break; |
| 257 | case '\\': fputs("%b", fp); break; |
| 258 | case '\t': fputs("%t", fp); break; |
| 259 | case '\n': fputs("%n", fp); break; |
| 260 | case '\a': fputs("%a", fp); break; |
| 261 | case '\r': fputs("%r", fp); break; |
| 262 | case '\0': fputs("%0", fp); break; |
| 263 | case '%': fputs("%%", fp); break; |
| 264 | default: |
| 265 | if (isprint((unsigned char)*p)) |
| 266 | fputc(*p, fp); |
| 267 | else |
| 268 | fprintf(fp, "%%x%02x%%", (unsigned char)*p); |
| 269 | break; |
| 270 | } |
| 271 | if (*p == '\n') |
| 272 | break; |
| 273 | } |
| 274 | fputs("\",\n", fp); |
| 275 | } |
| 276 | fclose(ifp); |
| 277 | |
| 278 | fputs("0\n};\n\n", fp); |
| 279 | } |
| 280 | |
| 281 | /* --- @quine__file@ --- * |
| 282 | * |
| 283 | * Arguments: @FILE *fp@ = output file handle |
| 284 | * @const char *name@ = name of input file |
| 285 | * @size_t fno@ = number of this file |
| 286 | * |
| 287 | * Returns: --- |
| 288 | * |
| 289 | * Use: Outputs a quine block containing the given file. |
| 290 | */ |
| 291 | |
| 292 | static void quine__file(FILE *fp, const char *name, size_t fno) |
| 293 | { |
| 294 | FILE *ifp; |
| 295 | |
| 296 | fprintf(fp, "static const char *qq__c_%lx[] = {\n", (unsigned long)fno); |
| 297 | |
| 298 | if ((ifp = fopen(name, "r")) == 0) |
| 299 | die("couldn't read `%s': %s", name, strerror(errno)); |
| 300 | fprintf(fp, "/* Filename: */ \"%s\",\n", name); |
| 301 | |
| 302 | /* --- Write file's mode to the output --- */ |
| 303 | |
| 304 | #ifndef QUINE_PORTABLE |
| 305 | { |
| 306 | struct stat st; |
| 307 | if (stat(name, &st) == 0) |
| 308 | fprintf(fp, "/* Mode: */ \"%%!0%03o\",\n", st.st_mode & 07777); |
| 309 | } |
| 310 | #endif |
| 311 | |
| 312 | quine__doFile(fp, ifp); |
| 313 | } |
| 314 | |
| 315 | /* --- Dummy quine library --- */ |
| 316 | |
| 317 | #ifdef QQ_XQUINE |
| 318 | |
| 319 | const char *qq_qqlib[] = { |
| 320 | "/* --- No quine library available in xquine --- */%n", |
| 321 | 0 |
| 322 | }; |
| 323 | |
| 324 | #endif |
| 325 | |
| 326 | /* --- @main@ --- * |
| 327 | * |
| 328 | * Arguments: @int argc@ = number of command line arguments |
| 329 | * @char *argv[]@ = pointer to the command line arguments |
| 330 | * |
| 331 | * Returns: Zero if successful, @EXIT_FAILURE@ if not. |
| 332 | * |
| 333 | * Use: Given a number of source files, outputs C code which prints |
| 334 | * them (and itself). |
| 335 | */ |
| 336 | |
| 337 | int main(int argc, char *argv[]) |
| 338 | { |
| 339 | char *inf = 0; |
| 340 | char *outf = 0; |
| 341 | char *qqlibf = 0; |
| 342 | unsigned int f = 0; |
| 343 | FILE *infp = 0, *outfp = 0; |
| 344 | size_t files = 0; |
| 345 | |
| 346 | enum { |
| 347 | f_duff = 1, |
| 348 | f_null = 2, |
| 349 | f_noFiles = 4 |
| 350 | }; |
| 351 | |
| 352 | /* --- Scan the command line arguments --- */ |
| 353 | |
| 354 | for (;;) { |
| 355 | int i; |
| 356 | |
| 357 | static struct option opts[] = { |
| 358 | { "help", 0, 0, 'h' }, |
| 359 | { "version", 0, 0, 'v' }, |
| 360 | { "null", 0, 0, '0' }, |
| 361 | { "file", gFlag_argReq, 0, 'f' }, |
| 362 | { "nofiles", 0, 0, 'n' }, |
| 363 | { "output", gFlag_argReq, 0, 'o' }, |
| 364 | { "qqlib", gFlag_argReq, 0, 'l' }, |
| 365 | #if !defined(QQ_XQUINE) && !defined(QQ_YQUINE) |
| 366 | { "quine", 0, 0, 'q' }, |
| 367 | { "quine-dump", 0, 0, 'Q' }, |
| 368 | #endif |
| 369 | { 0, 0, 0, 0 } |
| 370 | }; |
| 371 | |
| 372 | #if !defined(QQ_XQUINE) && !defined(QQ_YQUINE) |
| 373 | # define OPTS "hv0nf:o:lqQ" |
| 374 | #else |
| 375 | # define OPTS "hv0nf:o:l" |
| 376 | #endif |
| 377 | |
| 378 | i = mdwopt(argc, argv, OPTS, opts, 0, 0, 0); |
| 379 | |
| 380 | if (i < 0) |
| 381 | break; |
| 382 | |
| 383 | switch (i) { |
| 384 | case 'h': |
| 385 | quine__help(stdout); |
| 386 | exit(0); |
| 387 | case 'v': |
| 388 | quine__banner(stdout); |
| 389 | exit(0); |
| 390 | case '0': |
| 391 | f |= f_null; |
| 392 | break; |
| 393 | case 'f': |
| 394 | inf = optarg; |
| 395 | break; |
| 396 | case 'o': |
| 397 | outf = optarg; |
| 398 | break; |
| 399 | case 'l': |
| 400 | qqlibf = optarg; |
| 401 | break; |
| 402 | case 'n': |
| 403 | f |= f_noFiles; |
| 404 | break; |
| 405 | #if !defined(QQ_XQUINE) && !defined(QQ_YQUINE) |
| 406 | case 'q': |
| 407 | if (qq_create()) |
| 408 | die("couldn't build source distribution: %s", strerror(errno)); |
| 409 | exit(0); |
| 410 | case 'Q': |
| 411 | qq_dump(stdout); |
| 412 | exit(0); |
| 413 | break; |
| 414 | #endif |
| 415 | default: |
| 416 | f |= f_duff; |
| 417 | break; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | if (f & f_duff) { |
| 422 | quine__usage(stderr); |
| 423 | exit(EXIT_FAILURE); |
| 424 | } |
| 425 | |
| 426 | /* --- Output a file as the qqlib library --- */ |
| 427 | |
| 428 | if (qqlibf) { |
| 429 | infp = fopen(qqlibf, "r"); |
| 430 | if (!infp) |
| 431 | die("couldn't open input file `%s': %s", inf, strerror(errno)); |
| 432 | |
| 433 | if (!outf) |
| 434 | outf = "qqlout.c"; |
| 435 | if (strcmp(outf, "-") == 0) |
| 436 | outfp = stdout; |
| 437 | else |
| 438 | outfp = fopen(outf, "w"); |
| 439 | if (!outfp) |
| 440 | die("couldn't open output file `%s': %s", outf, strerror(errno)); |
| 441 | |
| 442 | fputs("/* quine library data */\n\n" |
| 443 | "const char *qq_qqlib[] = {\n", outfp); |
| 444 | quine__doFile(outfp, infp); |
| 445 | fclose(infp); |
| 446 | fclose(outfp); |
| 447 | exit(0); |
| 448 | } |
| 449 | |
| 450 | /* --- Time to start work --- */ |
| 451 | |
| 452 | if (~f & f_noFiles && (inf || optind == argc)) { |
| 453 | if (!inf || strcmp(inf, "-") == 0) |
| 454 | infp = stdin; |
| 455 | else |
| 456 | infp = fopen(inf, "r"); |
| 457 | if (!infp) |
| 458 | die("couldn't open input file `%s': %s", inf, strerror(errno)); |
| 459 | } |
| 460 | |
| 461 | if (!outf) |
| 462 | outf = "qqout.c"; |
| 463 | if (strcmp(outf, "-") == 0) |
| 464 | outfp = stdout; |
| 465 | else |
| 466 | outfp = fopen(outf, "w"); |
| 467 | if (!outfp) |
| 468 | die("couldn't open output file `%s': %s", outf, strerror(errno)); |
| 469 | |
| 470 | /* --- Output a header --- */ |
| 471 | |
| 472 | qq_head(outfp); |
| 473 | fputs("/* --- file contents tables --- */\n\n", outfp); |
| 474 | |
| 475 | /* --- Scan the command line first --- */ |
| 476 | |
| 477 | while (~f & f_noFiles && optind < argc) |
| 478 | quine__file(outfp, argv[optind++], files++); |
| 479 | |
| 480 | /* --- Now read the input file --- */ |
| 481 | |
| 482 | if (infp) { |
| 483 | char *p = 0; |
| 484 | char *q; |
| 485 | const char *del; |
| 486 | size_t sz = 0; |
| 487 | |
| 488 | if (f & f_null) |
| 489 | del = ""; |
| 490 | else |
| 491 | del = " \n\t"; |
| 492 | |
| 493 | while ((q = quine__readLine(infp, &p, &sz, del)) != 0) |
| 494 | quine__file(outfp, q, files++); |
| 495 | |
| 496 | if (fclose(infp)) |
| 497 | die("error reading input: %s", strerror(errno)); |
| 498 | } |
| 499 | |
| 500 | /* --- And output the trailer --- */ |
| 501 | |
| 502 | qq_tail(outfp, qq_qqlib, files, |
| 503 | strcmp(outf, "-") == 0 ? "<stdout>" : outf); |
| 504 | |
| 505 | /* --- Done --- */ |
| 506 | |
| 507 | if (outfp != stdout && fclose(outfp)) |
| 508 | die("error writing output: %s", strerror(errno)); |
| 509 | |
| 510 | return (0); |
| 511 | } |
| 512 | |
| 513 | /*----- That's all, folks -------------------------------------------------*/ |