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fb5663ca | 1 | /* Convert text in given files from the specified from-set to the to-set. |
06a60d9c | 2 | Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. |
fb5663ca UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
fb5663ca UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
fb5663ca | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
fb5663ca UD |
20 | |
21 | #include <argp.h> | |
e4060100 | 22 | #include <assert.h> |
8fe0fd03 | 23 | #include <ctype.h> |
fb5663ca UD |
24 | #include <errno.h> |
25 | #include <error.h> | |
26 | #include <fcntl.h> | |
27 | #include <iconv.h> | |
e4060100 | 28 | #include <langinfo.h> |
fb5663ca | 29 | #include <locale.h> |
8fe0fd03 | 30 | #include <search.h> |
fb5663ca UD |
31 | #include <stdio.h> |
32 | #include <stdlib.h> | |
33 | #include <string.h> | |
34 | #include <unistd.h> | |
4360eafd | 35 | #include <libintl.h> |
7cabd57c UD |
36 | #ifdef _POSIX_MAPPED_FILES |
37 | # include <sys/mman.h> | |
38 | #endif | |
93693c4d | 39 | #include <charmap.h> |
e62c19f1 | 40 | #include <gconv_int.h> |
93693c4d | 41 | #include "iconv_prog.h" |
fb5663ca UD |
42 | |
43 | /* Get libc version number. */ | |
44 | #include "../version.h" | |
45 | ||
46 | #define PACKAGE _libc_intl_domainname | |
47 | ||
48 | ||
49 | /* Name and version of program. */ | |
50 | static void print_version (FILE *stream, struct argp_state *state); | |
51 | void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version; | |
52 | ||
53 | #define OPT_VERBOSE 1000 | |
adcf0e4a | 54 | #define OPT_LIST 'l' |
fb5663ca UD |
55 | |
56 | /* Definitions of arguments for argp functions. */ | |
57 | static const struct argp_option options[] = | |
58 | { | |
59 | { NULL, 0, NULL, 0, N_("Input/Output format specification:") }, | |
60 | { "from-code", 'f', "NAME", 0, N_("encoding of original text") }, | |
61 | { "to-code", 't', "NAME", 0, N_("encoding for output") }, | |
8fe0fd03 | 62 | { NULL, 0, NULL, 0, N_("Information:") }, |
adcf0e4a | 63 | { "list", 'l', NULL, 0, N_("list all known coded character sets") }, |
fb5663ca | 64 | { NULL, 0, NULL, 0, N_("Output control:") }, |
adcf0e4a | 65 | { NULL, 'c', NULL, 0, N_("omit invalid characters from output") }, |
fb5663ca | 66 | { "output", 'o', "FILE", 0, N_("output file") }, |
6d77214d | 67 | { "silent", 's', NULL, 0, N_("suppress warnings") }, |
fb5663ca UD |
68 | { "verbose", OPT_VERBOSE, NULL, 0, N_("print progress information") }, |
69 | { NULL, 0, NULL, 0, NULL } | |
70 | }; | |
71 | ||
72 | /* Short description of program. */ | |
73 | static const char doc[] = N_("\ | |
74 | Convert encoding of given files from one encoding to another."); | |
75 | ||
76 | /* Strings for arguments in help texts. */ | |
77 | static const char args_doc[] = N_("[FILE...]"); | |
78 | ||
79 | /* Prototype for option handler. */ | |
adcf0e4a | 80 | static error_t parse_opt (int key, char *arg, struct argp_state *state); |
fb5663ca UD |
81 | |
82 | /* Function to print some extra text in the help message. */ | |
adcf0e4a | 83 | static char *more_help (int key, const char *text, void *input); |
fb5663ca UD |
84 | |
85 | /* Data structure to communicate with argp functions. */ | |
86 | static struct argp argp = | |
87 | { | |
88 | options, parse_opt, args_doc, doc, NULL, more_help | |
89 | }; | |
90 | ||
91 | /* Code sets to convert from and to respectively. */ | |
92 | static const char *from_code; | |
93 | static const char *to_code; | |
94 | ||
95 | /* File to write output to. If NULL write to stdout. */ | |
96 | static const char *output_file; | |
97 | ||
98 | /* Nonzero if verbose ouput is wanted. */ | |
93693c4d | 99 | int verbose; |
fb5663ca | 100 | |
8fe0fd03 UD |
101 | /* Nonzero if list of all coded character sets is wanted. */ |
102 | static int list; | |
103 | ||
85830c4c | 104 | /* If nonzero omit invalid character from output. */ |
93693c4d | 105 | int omit_invalid; |
85830c4c | 106 | |
fb5663ca | 107 | /* Prototypes for the functions doing the actual work. */ |
3b434940 | 108 | static int process_block (iconv_t cd, char *addr, size_t len, FILE *output); |
fb5663ca UD |
109 | static int process_fd (iconv_t cd, int fd, FILE *output); |
110 | static int process_file (iconv_t cd, FILE *input, FILE *output); | |
2bd60880 | 111 | static void print_known_names (void) internal_function; |
fb5663ca UD |
112 | |
113 | ||
114 | int | |
115 | main (int argc, char *argv[]) | |
116 | { | |
117 | int status = EXIT_SUCCESS; | |
118 | int remaining; | |
119 | FILE *output; | |
120 | iconv_t cd; | |
85830c4c | 121 | const char *orig_to_code; |
93693c4d UD |
122 | struct charmap_t *from_charmap = NULL; |
123 | struct charmap_t *to_charmap = NULL; | |
fb5663ca UD |
124 | |
125 | /* Set locale via LC_ALL. */ | |
126 | setlocale (LC_ALL, ""); | |
127 | ||
128 | /* Set the text message domain. */ | |
129 | textdomain (_libc_intl_domainname); | |
130 | ||
131 | /* Parse and process arguments. */ | |
132 | argp_parse (&argp, argc, argv, 0, &remaining, NULL); | |
133 | ||
8fe0fd03 UD |
134 | /* List all coded character sets if wanted. */ |
135 | if (list) | |
136 | { | |
137 | print_known_names (); | |
138 | exit (EXIT_SUCCESS); | |
139 | } | |
fb5663ca | 140 | if (from_code == NULL) |
e4060100 UD |
141 | { |
142 | /* The Unix standard says that in this case the charset of the current | |
143 | locale is used. */ | |
144 | from_code = nl_langinfo (CODESET); | |
145 | assert (from_code != NULL); | |
146 | } | |
fb5663ca | 147 | if (to_code == NULL) |
e4060100 UD |
148 | { |
149 | /* The Unix standard says that in this case the charset of the current | |
150 | locale is used. */ | |
151 | to_code = nl_langinfo (CODESET); | |
152 | assert (to_code != NULL); | |
153 | } | |
fb5663ca | 154 | |
85830c4c UD |
155 | /* If we have to ignore errors make sure we use the appropriate name for |
156 | the to-character-set. */ | |
157 | orig_to_code = to_code; | |
158 | if (omit_invalid) | |
159 | { | |
160 | const char *errhand = strchrnul (to_code, '/'); | |
161 | int nslash = 2; | |
162 | char *newp; | |
163 | char *cp; | |
164 | ||
165 | if (*errhand == '/') | |
166 | { | |
167 | --nslash; | |
168 | errhand = strchrnul (errhand, '/'); | |
169 | ||
170 | if (*errhand == '/') | |
171 | { | |
172 | --nslash; | |
173 | ++errhand; | |
174 | } | |
175 | } | |
176 | ||
177 | newp = (char *) alloca (errhand - to_code + nslash + 6 + 1); | |
178 | cp = mempcpy (newp, to_code, errhand - to_code); | |
23054ade | 179 | while (nslash-- > 0) |
85830c4c | 180 | *cp++ = '/'; |
c7fb46a9 | 181 | memcpy (cp, "IGNORE", sizeof ("IGNORE")); |
85830c4c UD |
182 | |
183 | to_code = newp; | |
184 | } | |
185 | ||
93693c4d UD |
186 | /* POSIX 1003.2b introduces a silly thing: the arguments to -t anf -f |
187 | can be file names of charmaps. In this case iconv will have to read | |
188 | those charmaps and use them to do the conversion. But there are | |
189 | holes in the specification. There is nothing said that if -f is a | |
190 | charmap filename that -t must be, too. And vice versa. There is | |
191 | also no word about the symbolic names used. What if they don't | |
192 | match? */ | |
193 | if (strchr (from_code, '/') != NULL) | |
194 | /* The from-name might be a charmap file name. Try reading the | |
195 | file. */ | |
196 | from_charmap = charmap_read (from_code, /*0, 1*/1, 0, 0); | |
197 | ||
198 | if (strchr (orig_to_code, '/') != NULL) | |
199 | /* The to-name might be a charmap file name. Try reading the | |
200 | file. */ | |
201 | to_charmap = charmap_read (orig_to_code, /*0, 1,*/1,0, 0); | |
202 | ||
fb5663ca UD |
203 | |
204 | /* Determine output file. */ | |
377c725f | 205 | if (output_file != NULL && strcmp (output_file, "-") != 0) |
fb5663ca UD |
206 | { |
207 | output = fopen (output_file, "w"); | |
208 | if (output == NULL) | |
209 | error (EXIT_FAILURE, errno, _("cannot open output file")); | |
210 | } | |
211 | else | |
212 | output = stdout; | |
213 | ||
93693c4d UD |
214 | /* At this point we have to handle two cases. The first one is |
215 | where a charmap is used for the from- or to-charset, or both. We | |
216 | handle this special since it is very different from the sane way of | |
217 | doing things. The other case allows converting using the iconv() | |
218 | function. */ | |
219 | if (from_charmap != NULL || to_charmap != NULL) | |
220 | /* Construct the conversion table and do the conversion. */ | |
221 | status = charmap_conversion (from_code, from_charmap, to_code, to_charmap, | |
222 | argc, remaining, argv, output); | |
fb5663ca | 223 | else |
93693c4d UD |
224 | { |
225 | /* Let's see whether we have these coded character sets. */ | |
226 | cd = iconv_open (to_code, from_code); | |
227 | if (cd == (iconv_t) -1) | |
228 | { | |
229 | if (errno == EINVAL) | |
230 | error (EXIT_FAILURE, 0, | |
231 | _("conversion from `%s' to `%s' not supported"), | |
232 | from_code, orig_to_code); | |
233 | else | |
234 | error (EXIT_FAILURE, errno, | |
235 | _("failed to start conversion processing")); | |
236 | } | |
adcf0e4a | 237 | |
93693c4d UD |
238 | /* Now process the remaining files. Write them to stdout or the file |
239 | specified with the `-o' parameter. If we have no file given as | |
240 | the parameter process all from stdin. */ | |
241 | if (remaining == argc) | |
242 | { | |
243 | if (process_file (cd, stdin, output) != 0) | |
244 | status = EXIT_FAILURE; | |
245 | } | |
246 | else | |
247 | do | |
248 | { | |
d3f8be6d | 249 | #ifdef _POSIX_MAPPED_FILES |
93693c4d UD |
250 | struct stat st; |
251 | char *addr; | |
d3f8be6d | 252 | #endif |
93693c4d UD |
253 | int fd; |
254 | ||
255 | if (verbose) | |
256 | printf ("%s:\n", argv[remaining]); | |
257 | if (strcmp (argv[remaining], "-") == 0) | |
258 | fd = 0; | |
259 | else | |
adcf0e4a | 260 | { |
93693c4d UD |
261 | fd = open (argv[remaining], O_RDONLY); |
262 | ||
263 | if (fd == -1) | |
264 | { | |
265 | error (0, errno, _("cannot open input file `%s'"), | |
266 | argv[remaining]); | |
267 | status = EXIT_FAILURE; | |
268 | continue; | |
269 | } | |
adcf0e4a | 270 | } |
fb5663ca | 271 | |
7cabd57c | 272 | #ifdef _POSIX_MAPPED_FILES |
93693c4d UD |
273 | /* We have possibilities for reading the input file. First try |
274 | to mmap() it since this will provide the fastest solution. */ | |
275 | if (fstat (fd, &st) == 0 | |
276 | && ((addr = mmap (NULL, st.st_size, PROT_READ, MAP_PRIVATE, | |
277 | fd, 0)) != MAP_FAILED)) | |
fb5663ca | 278 | { |
93693c4d UD |
279 | /* Yes, we can use mmap(). The descriptor is not needed |
280 | anymore. */ | |
281 | if (close (fd) != 0) | |
282 | error (EXIT_FAILURE, errno, | |
283 | _("error while closing input `%s'"), | |
284 | argv[remaining]); | |
285 | ||
286 | if (process_block (cd, addr, st.st_size, output) < 0) | |
287 | { | |
288 | /* Something went wrong. */ | |
289 | status = EXIT_FAILURE; | |
290 | ||
291 | /* We don't need the input data anymore. */ | |
292 | munmap ((void *) addr, st.st_size); | |
293 | ||
294 | /* We cannot go on with producing output since it might | |
295 | lead to problem because the last output might leave | |
296 | the output stream in an undefined state. */ | |
297 | break; | |
298 | } | |
fb5663ca UD |
299 | |
300 | /* We don't need the input data anymore. */ | |
301 | munmap ((void *) addr, st.st_size); | |
fb5663ca | 302 | } |
93693c4d | 303 | else |
7cabd57c | 304 | #endif /* _POSIX_MAPPED_FILES */ |
fb5663ca | 305 | { |
93693c4d UD |
306 | /* Read the file in pieces. */ |
307 | if (process_fd (cd, fd, output) != 0) | |
308 | { | |
309 | /* Something went wrong. */ | |
310 | status = EXIT_FAILURE; | |
311 | ||
312 | /* We don't need the input file anymore. */ | |
313 | close (fd); | |
314 | ||
315 | /* We cannot go on with producing output since it might | |
316 | lead to problem because the last output might leave | |
317 | the output stream in an undefined state. */ | |
318 | break; | |
319 | } | |
320 | ||
321 | /* Now close the file. */ | |
fb5663ca | 322 | close (fd); |
fb5663ca | 323 | } |
fb5663ca | 324 | } |
93693c4d UD |
325 | while (++remaining < argc); |
326 | } | |
fb5663ca UD |
327 | |
328 | /* Close the output file now. */ | |
329 | if (fclose (output)) | |
330 | error (EXIT_FAILURE, errno, _("error while closing output file")); | |
331 | ||
332 | return status; | |
333 | } | |
334 | ||
335 | ||
336 | /* Handle program arguments. */ | |
337 | static error_t | |
338 | parse_opt (int key, char *arg, struct argp_state *state) | |
339 | { | |
340 | switch (key) | |
341 | { | |
342 | case 'f': | |
343 | from_code = arg; | |
344 | break; | |
345 | case 't': | |
346 | to_code = arg; | |
347 | break; | |
348 | case 'o': | |
349 | output_file = arg; | |
350 | break; | |
adcf0e4a UD |
351 | case 's': |
352 | /* Nothing, for now at least. We are not giving out any information | |
353 | about missing character or so. */ | |
354 | break; | |
355 | case 'c': | |
85830c4c UD |
356 | /* Omit invalid characters from output. */ |
357 | omit_invalid = 1; | |
adcf0e4a | 358 | break; |
fb5663ca UD |
359 | case OPT_VERBOSE: |
360 | verbose = 1; | |
361 | break; | |
8fe0fd03 UD |
362 | case OPT_LIST: |
363 | list = 1; | |
364 | break; | |
fb5663ca UD |
365 | default: |
366 | return ARGP_ERR_UNKNOWN; | |
367 | } | |
368 | return 0; | |
369 | } | |
370 | ||
371 | ||
372 | static char * | |
373 | more_help (int key, const char *text, void *input) | |
374 | { | |
375 | switch (key) | |
376 | { | |
377 | case ARGP_KEY_HELP_EXTRA: | |
378 | /* We print some extra information. */ | |
379 | return strdup (gettext ("\ | |
380 | Report bugs using the `glibcbug' script to <bugs@gnu.org>.\n")); | |
381 | default: | |
382 | break; | |
383 | } | |
384 | return (char *) text; | |
385 | } | |
386 | ||
387 | ||
388 | /* Print the version information. */ | |
389 | static void | |
390 | print_version (FILE *stream, struct argp_state *state) | |
391 | { | |
392 | fprintf (stream, "iconv (GNU %s) %s\n", PACKAGE, VERSION); | |
393 | fprintf (stream, gettext ("\ | |
394 | Copyright (C) %s Free Software Foundation, Inc.\n\ | |
395 | This is free software; see the source for copying conditions. There is NO\n\ | |
396 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ | |
06a60d9c | 397 | "), "2001"); |
fb5663ca UD |
398 | fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper"); |
399 | } | |
400 | ||
401 | ||
402 | static int | |
3b434940 | 403 | process_block (iconv_t cd, char *addr, size_t len, FILE *output) |
fb5663ca UD |
404 | { |
405 | #define OUTBUF_SIZE 32768 | |
9b26f5c4 | 406 | const char *start = addr; |
fb5663ca | 407 | char outbuf[OUTBUF_SIZE]; |
8619129f UD |
408 | char *outptr; |
409 | size_t outlen; | |
410 | size_t n; | |
fb5663ca UD |
411 | |
412 | while (len > 0) | |
413 | { | |
8619129f UD |
414 | outptr = outbuf; |
415 | outlen = OUTBUF_SIZE; | |
416 | n = iconv (cd, &addr, &len, &outptr, &outlen); | |
fb5663ca UD |
417 | |
418 | if (outptr != outbuf) | |
419 | { | |
420 | /* We have something to write out. */ | |
4d3a563f UD |
421 | int errno_save = errno; |
422 | ||
3c5edd4d | 423 | if (fwrite (outbuf, 1, outptr - outbuf, output) < outptr - outbuf |
fb5663ca UD |
424 | || ferror (output)) |
425 | { | |
426 | /* Error occurred while printing the result. */ | |
427 | error (0, 0, _("\ | |
428 | conversion stopped due to problem in writing the output")); | |
429 | return -1; | |
430 | } | |
4d3a563f UD |
431 | |
432 | errno = errno_save; | |
fb5663ca UD |
433 | } |
434 | ||
435 | if (n != (size_t) -1) | |
c559a3ca UD |
436 | { |
437 | /* All the input test is processed. For state-dependent | |
438 | character sets we have to flush the state now. */ | |
439 | outptr = outbuf; | |
440 | outlen = OUTBUF_SIZE; | |
93693c4d | 441 | (void) iconv (cd, NULL, NULL, &outptr, &outlen); |
c559a3ca UD |
442 | |
443 | if (outptr != outbuf) | |
444 | { | |
445 | /* We have something to write out. */ | |
446 | int errno_save = errno; | |
447 | ||
448 | if (fwrite (outbuf, 1, outptr - outbuf, output) < outptr - outbuf | |
449 | || ferror (output)) | |
450 | { | |
451 | /* Error occurred while printing the result. */ | |
452 | error (0, 0, _("\ | |
453 | conversion stopped due to problem in writing the output")); | |
454 | return -1; | |
455 | } | |
456 | ||
457 | errno = errno_save; | |
458 | } | |
459 | ||
460 | break; | |
461 | } | |
fb5663ca UD |
462 | |
463 | if (errno != E2BIG) | |
464 | { | |
465 | /* iconv() ran into a problem. */ | |
466 | switch (errno) | |
467 | { | |
468 | case EILSEQ: | |
9b26f5c4 | 469 | error (0, 0, _("illegal input sequence at position %ld"), |
d569d333 | 470 | (long) (addr - start)); |
fb5663ca UD |
471 | break; |
472 | case EINVAL: | |
473 | error (0, 0, _("\ | |
474 | incomplete character or shift sequence at end of buffer")); | |
475 | break; | |
476 | case EBADF: | |
477 | error (0, 0, _("internal error (illegal descriptor)")); | |
478 | break; | |
479 | default: | |
480 | error (0, 0, _("unknown iconv() error %d"), errno); | |
481 | break; | |
482 | } | |
483 | ||
484 | return -1; | |
485 | } | |
486 | } | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
491 | ||
492 | static int | |
493 | process_fd (iconv_t cd, int fd, FILE *output) | |
494 | { | |
495 | /* we have a problem with reading from a desriptor since we must not | |
496 | provide the iconv() function an incomplete character or shift | |
497 | sequence at the end of the buffer. Since we have to deal with | |
498 | arbitrary encodings we must read the whole text in a buffer and | |
499 | process it in one step. */ | |
500 | static char *inbuf = NULL; | |
501 | static size_t maxlen = 0; | |
502 | char *inptr = NULL; | |
503 | size_t actlen = 0; | |
504 | ||
505 | while (actlen < maxlen) | |
506 | { | |
2e47aff5 | 507 | ssize_t n = read (fd, inptr, maxlen - actlen); |
fb5663ca UD |
508 | |
509 | if (n == 0) | |
510 | /* No more text to read. */ | |
511 | break; | |
512 | ||
513 | if (n == -1) | |
514 | { | |
515 | /* Error while reading. */ | |
516 | error (0, errno, _("error while reading the input")); | |
517 | return -1; | |
518 | } | |
519 | ||
520 | inptr += n; | |
521 | actlen += n; | |
522 | } | |
523 | ||
524 | if (actlen == maxlen) | |
525 | while (1) | |
526 | { | |
2e47aff5 | 527 | ssize_t n; |
fb5663ca UD |
528 | |
529 | /* Increase the buffer. */ | |
530 | maxlen += 32768; | |
531 | inbuf = realloc (inbuf, maxlen); | |
532 | if (inbuf == NULL) | |
533 | error (0, errno, _("unable to allocate buffer for input")); | |
534 | inptr = inbuf + actlen; | |
535 | ||
536 | do | |
537 | { | |
538 | n = read (fd, inptr, maxlen - actlen); | |
539 | ||
540 | if (n == 0) | |
541 | /* No more text to read. */ | |
542 | break; | |
543 | ||
544 | if (n == -1) | |
545 | { | |
546 | /* Error while reading. */ | |
547 | error (0, errno, _("error while reading the input")); | |
548 | return -1; | |
549 | } | |
550 | ||
551 | inptr += n; | |
552 | actlen += n; | |
553 | } | |
554 | while (actlen < maxlen); | |
555 | ||
556 | if (n == 0) | |
557 | /* Break again so we leave both loops. */ | |
558 | break; | |
559 | } | |
560 | ||
561 | /* Now we have all the input in the buffer. Process it in one run. */ | |
562 | return process_block (cd, inbuf, actlen, output); | |
563 | } | |
564 | ||
565 | ||
566 | static int | |
567 | process_file (iconv_t cd, FILE *input, FILE *output) | |
568 | { | |
569 | /* This should be safe since we use this function only for `stdin' and | |
570 | we haven't read anything so far. */ | |
571 | return process_fd (cd, fileno (input), output); | |
572 | } | |
8fe0fd03 UD |
573 | |
574 | ||
575 | /* Print all known character sets/encodings. */ | |
576 | static void *printlist; | |
577 | static size_t column; | |
578 | static int not_first; | |
579 | ||
580 | static void | |
581 | insert_print_list (const void *nodep, VISIT value, int level) | |
582 | { | |
583 | if (value == leaf || value == postorder) | |
584 | { | |
585 | const struct gconv_alias *s = *(const struct gconv_alias **) nodep; | |
9b26f5c4 | 586 | tsearch (s->fromname, &printlist, (__compar_fn_t) strverscmp); |
8fe0fd03 UD |
587 | } |
588 | } | |
589 | ||
590 | static void | |
b17c0a8e | 591 | do_print_human (const void *nodep, VISIT value, int level) |
8fe0fd03 UD |
592 | { |
593 | if (value == leaf || value == postorder) | |
594 | { | |
595 | const char *s = *(const char **) nodep; | |
596 | size_t len = strlen (s); | |
597 | size_t cnt; | |
598 | ||
599 | while (len > 0 && s[len - 1] == '/') | |
600 | --len; | |
601 | ||
602 | for (cnt = 0; cnt < len; ++cnt) | |
603 | if (isalnum (s[cnt])) | |
604 | break; | |
605 | if (cnt == len) | |
606 | return; | |
607 | ||
608 | if (not_first) | |
609 | { | |
610 | putchar (','); | |
611 | ++column; | |
612 | ||
613 | if (column > 2 && column + len > 77) | |
614 | { | |
615 | fputs ("\n ", stdout); | |
616 | column = 2; | |
617 | } | |
618 | else | |
619 | { | |
620 | putchar (' '); | |
621 | ++column; | |
622 | } | |
623 | } | |
624 | else | |
9b26f5c4 | 625 | not_first = 1; |
8fe0fd03 UD |
626 | |
627 | fwrite (s, len, 1, stdout); | |
628 | column += len; | |
629 | } | |
630 | } | |
631 | ||
b17c0a8e UD |
632 | static void |
633 | do_print (const void *nodep, VISIT value, int level) | |
634 | { | |
635 | if (value == leaf || value == postorder) | |
636 | { | |
637 | const char *s = *(const char **) nodep; | |
638 | ||
639 | puts (s); | |
640 | } | |
641 | } | |
642 | ||
8fe0fd03 | 643 | static void |
2bd60880 UD |
644 | internal_function |
645 | add_known_names (struct gconv_module *node) | |
646 | { | |
647 | if (node->left != NULL) | |
648 | add_known_names (node->left); | |
649 | if (node->right != NULL) | |
650 | add_known_names (node->right); | |
2bd60880 UD |
651 | do |
652 | { | |
d2dfc5de UD |
653 | if (strcmp (node->from_string, "INTERNAL")) |
654 | tsearch (node->from_string, &printlist, | |
655 | (__compar_fn_t) strverscmp); | |
656 | if (strcmp (node->to_string, "INTERNAL")) | |
657 | tsearch (node->to_string, &printlist, (__compar_fn_t) strverscmp); | |
2bd60880 | 658 | |
d2dfc5de | 659 | node = node->same; |
2bd60880 UD |
660 | } |
661 | while (node != NULL); | |
662 | } | |
663 | ||
664 | static void | |
665 | internal_function | |
8fe0fd03 UD |
666 | print_known_names (void) |
667 | { | |
8fe0fd03 UD |
668 | iconv_t h; |
669 | ||
670 | /* We must initialize the internal databases first. */ | |
671 | h = iconv_open ("L1", "L1"); | |
672 | iconv_close (h); | |
673 | ||
674 | /* First add the aliases. */ | |
675 | twalk (__gconv_alias_db, insert_print_list); | |
676 | ||
677 | /* Add the from- and to-names from the known modules. */ | |
2bd60880 | 678 | add_known_names (__gconv_modules_db); |
8fe0fd03 UD |
679 | |
680 | fputs (_("\ | |
681 | The following list contain all the coded character sets known. This does\n\ | |
682 | not necessarily mean that all combinations of these names can be used for\n\ | |
683 | the FROM and TO command line parameters. One coded character set can be\n\ | |
d2dfc5de | 684 | listed with several different names (aliases).\n\n "), stdout); |
8fe0fd03 UD |
685 | |
686 | /* Now print the collected names. */ | |
687 | column = 2; | |
b17c0a8e UD |
688 | if (isatty (fileno (stdout))) |
689 | { | |
690 | twalk (printlist, do_print_human); | |
8fe0fd03 | 691 | |
b17c0a8e UD |
692 | if (column != 0) |
693 | puts (""); | |
694 | } | |
695 | else | |
696 | twalk (printlist, do_print); | |
8fe0fd03 | 697 | } |