267c6003 |
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 -------------------------------------------------*/ |