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234b45d4 | 1 | /* Character set conversion support for GDB. |
1bac305b | 2 | |
4c38e0a4 JB |
3 | Copyright (C) 2001, 2003, 2007, 2008, 2009, 2010 |
4 | Free Software Foundation, Inc. | |
234b45d4 KB |
5 | |
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
234b45d4 KB |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
234b45d4 KB |
20 | |
21 | #include "defs.h" | |
22 | #include "charset.h" | |
23 | #include "gdbcmd.h" | |
24 | #include "gdb_assert.h" | |
6c7a06a3 | 25 | #include "gdb_obstack.h" |
732f6a93 | 26 | #include "gdb_wait.h" |
6c7a06a3 TT |
27 | #include "charset-list.h" |
28 | #include "vec.h" | |
40b5c9fb | 29 | #include "environ.h" |
f870a310 | 30 | #include "arch-utils.h" |
234b45d4 KB |
31 | |
32 | #include <stddef.h> | |
4ef3f3be | 33 | #include "gdb_string.h" |
234b45d4 KB |
34 | #include <ctype.h> |
35 | ||
43484f03 DJ |
36 | #ifdef USE_WIN32API |
37 | #include <windows.h> | |
38 | #endif | |
234b45d4 KB |
39 | \f |
40 | /* How GDB's character set support works | |
41 | ||
6c7a06a3 | 42 | GDB has three global settings: |
234b45d4 KB |
43 | |
44 | - The `current host character set' is the character set GDB should | |
45 | use in talking to the user, and which (hopefully) the user's | |
6c7a06a3 TT |
46 | terminal knows how to display properly. Most users should not |
47 | change this. | |
234b45d4 KB |
48 | |
49 | - The `current target character set' is the character set the | |
50 | program being debugged uses. | |
51 | ||
6c7a06a3 TT |
52 | - The `current target wide character set' is the wide character set |
53 | the program being debugged uses, that is, the encoding used for | |
54 | wchar_t. | |
55 | ||
234b45d4 KB |
56 | There are commands to set each of these, and mechanisms for |
57 | choosing reasonable default values. GDB has a global list of | |
58 | character sets that it can use as its host or target character | |
59 | sets. | |
60 | ||
61 | The header file `charset.h' declares various functions that | |
62 | different pieces of GDB need to perform tasks like: | |
63 | ||
64 | - printing target strings and characters to the user's terminal | |
65 | (mostly target->host conversions), | |
66 | ||
67 | - building target-appropriate representations of strings and | |
68 | characters the user enters in expressions (mostly host->target | |
69 | conversions), | |
70 | ||
6c7a06a3 TT |
71 | and so on. |
72 | ||
73 | To avoid excessive code duplication and maintenance efforts, | |
74 | GDB simply requires a capable iconv function. Users on platforms | |
75 | without a suitable iconv can use the GNU iconv library. */ | |
234b45d4 KB |
76 | |
77 | \f | |
6c7a06a3 | 78 | #ifdef PHONY_ICONV |
234b45d4 | 79 | |
6c7a06a3 TT |
80 | /* Provide a phony iconv that does as little as possible. Also, |
81 | arrange for there to be a single available character set. */ | |
234b45d4 | 82 | |
6c7a06a3 TT |
83 | #undef GDB_DEFAULT_HOST_CHARSET |
84 | #define GDB_DEFAULT_HOST_CHARSET "ISO-8859-1" | |
85 | #define GDB_DEFAULT_TARGET_CHARSET "ISO-8859-1" | |
86 | #define GDB_DEFAULT_TARGET_WIDE_CHARSET "ISO-8859-1" | |
87 | #undef DEFAULT_CHARSET_NAMES | |
88 | #define DEFAULT_CHARSET_NAMES GDB_DEFAULT_HOST_CHARSET , | |
89 | ||
90 | #undef iconv_t | |
91 | #define iconv_t int | |
92 | #undef iconv_open | |
93 | #undef iconv | |
94 | #undef iconv_close | |
95 | ||
0dd7fb99 TT |
96 | #undef ICONV_CONST |
97 | #define ICONV_CONST const | |
98 | ||
76208fec | 99 | /* Some systems don't have EILSEQ, so we define it here, but not as |
e726d784 EZ |
100 | EINVAL, because callers of `iconv' want to distinguish EINVAL and |
101 | EILSEQ. This is what iconv.h from libiconv does as well. Note | |
102 | that wchar.h may also define EILSEQ, so this needs to be after we | |
103 | include wchar.h, which happens in defs.h through gdb_wchar.h. */ | |
104 | #ifndef EILSEQ | |
105 | #define EILSEQ ENOENT | |
106 | #endif | |
107 | ||
6c7a06a3 TT |
108 | iconv_t |
109 | iconv_open (const char *to, const char *from) | |
110 | { | |
b8899f2b | 111 | /* We allow conversions from UTF-32BE, wchar_t, and the host charset. |
6c7a06a3 | 112 | We allow conversions to wchar_t and the host charset. */ |
b8899f2b | 113 | if (strcmp (from, "UTF-32BE") && strcmp (from, "wchar_t") |
6c7a06a3 TT |
114 | && strcmp (from, GDB_DEFAULT_HOST_CHARSET)) |
115 | return -1; | |
116 | if (strcmp (to, "wchar_t") && strcmp (to, GDB_DEFAULT_HOST_CHARSET)) | |
117 | return -1; | |
234b45d4 | 118 | |
b8899f2b | 119 | /* Return 1 if we are converting from UTF-32BE, 0 otherwise. This is |
6c7a06a3 | 120 | used as a flag in calls to iconv. */ |
b8899f2b | 121 | return !strcmp (from, "UTF-32BE"); |
6c7a06a3 | 122 | } |
234b45d4 | 123 | |
6c7a06a3 TT |
124 | int |
125 | iconv_close (iconv_t arg) | |
126 | { | |
127 | return 0; | |
128 | } | |
234b45d4 | 129 | |
6c7a06a3 | 130 | size_t |
b8899f2b | 131 | iconv (iconv_t utf_flag, const char **inbuf, size_t *inbytesleft, |
6c7a06a3 TT |
132 | char **outbuf, size_t *outbytesleft) |
133 | { | |
b8899f2b | 134 | if (utf_flag) |
6c7a06a3 TT |
135 | { |
136 | while (*inbytesleft >= 4) | |
137 | { | |
138 | size_t j; | |
139 | unsigned long c = 0; | |
140 | ||
141 | for (j = 0; j < 4; ++j) | |
142 | { | |
143 | c <<= 8; | |
144 | c += (*inbuf)[j] & 0xff; | |
145 | } | |
146 | ||
147 | if (c >= 256) | |
148 | { | |
149 | errno = EILSEQ; | |
150 | return -1; | |
151 | } | |
152 | **outbuf = c & 0xff; | |
153 | ++*outbuf; | |
154 | --*outbytesleft; | |
155 | ||
156 | ++*inbuf; | |
157 | *inbytesleft -= 4; | |
158 | } | |
159 | if (*inbytesleft < 4) | |
160 | { | |
161 | errno = EINVAL; | |
162 | return -1; | |
163 | } | |
164 | } | |
165 | else | |
166 | { | |
167 | /* In all other cases we simply copy input bytes to the | |
168 | output. */ | |
169 | size_t amt = *inbytesleft; | |
170 | if (amt > *outbytesleft) | |
171 | amt = *outbytesleft; | |
172 | memcpy (*outbuf, *inbuf, amt); | |
173 | *inbuf += amt; | |
174 | *outbuf += amt; | |
175 | *inbytesleft -= amt; | |
176 | *outbytesleft -= amt; | |
177 | } | |
234b45d4 | 178 | |
6c7a06a3 TT |
179 | if (*inbytesleft) |
180 | { | |
181 | errno = E2BIG; | |
182 | return -1; | |
183 | } | |
234b45d4 | 184 | |
6c7a06a3 TT |
185 | /* The number of non-reversible conversions -- but they were all |
186 | reversible. */ | |
187 | return 0; | |
188 | } | |
234b45d4 | 189 | |
6c7a06a3 | 190 | #endif |
234b45d4 KB |
191 | |
192 | ||
193 | \f | |
194 | /* The global lists of character sets and translations. */ | |
195 | ||
196 | ||
e33d66ec EZ |
197 | #ifndef GDB_DEFAULT_TARGET_CHARSET |
198 | #define GDB_DEFAULT_TARGET_CHARSET "ISO-8859-1" | |
199 | #endif | |
200 | ||
6c7a06a3 | 201 | #ifndef GDB_DEFAULT_TARGET_WIDE_CHARSET |
b8899f2b | 202 | #define GDB_DEFAULT_TARGET_WIDE_CHARSET "UTF-32" |
6c7a06a3 TT |
203 | #endif |
204 | ||
205 | static const char *auto_host_charset_name = GDB_DEFAULT_HOST_CHARSET; | |
206 | static const char *host_charset_name = "auto"; | |
920d2a44 AC |
207 | static void |
208 | show_host_charset_name (struct ui_file *file, int from_tty, | |
209 | struct cmd_list_element *c, | |
210 | const char *value) | |
211 | { | |
6c7a06a3 TT |
212 | if (!strcmp (value, "auto")) |
213 | fprintf_filtered (file, | |
214 | _("The host character set is \"auto; currently %s\".\n"), | |
215 | auto_host_charset_name); | |
216 | else | |
217 | fprintf_filtered (file, _("The host character set is \"%s\".\n"), value); | |
920d2a44 AC |
218 | } |
219 | ||
f870a310 | 220 | static const char *target_charset_name = "auto"; |
920d2a44 AC |
221 | static void |
222 | show_target_charset_name (struct ui_file *file, int from_tty, | |
223 | struct cmd_list_element *c, const char *value) | |
224 | { | |
f870a310 TT |
225 | if (!strcmp (value, "auto")) |
226 | fprintf_filtered (file, | |
227 | _("The target character set is \"auto; " | |
228 | "currently %s\".\n"), | |
229 | gdbarch_auto_charset (get_current_arch ())); | |
230 | else | |
231 | fprintf_filtered (file, _("The target character set is \"%s\".\n"), | |
232 | value); | |
920d2a44 AC |
233 | } |
234 | ||
f870a310 | 235 | static const char *target_wide_charset_name = "auto"; |
6c7a06a3 TT |
236 | static void |
237 | show_target_wide_charset_name (struct ui_file *file, int from_tty, | |
238 | struct cmd_list_element *c, const char *value) | |
e33d66ec | 239 | { |
f870a310 TT |
240 | if (!strcmp (value, "auto")) |
241 | fprintf_filtered (file, | |
242 | _("The target wide character set is \"auto; " | |
243 | "currently %s\".\n"), | |
244 | gdbarch_auto_wide_charset (get_current_arch ())); | |
245 | else | |
246 | fprintf_filtered (file, _("The target wide character set is \"%s\".\n"), | |
247 | value); | |
6c7a06a3 | 248 | } |
e33d66ec | 249 | |
6c7a06a3 | 250 | static const char *default_charset_names[] = |
e33d66ec | 251 | { |
6c7a06a3 | 252 | DEFAULT_CHARSET_NAMES |
e33d66ec EZ |
253 | 0 |
254 | }; | |
234b45d4 | 255 | |
6c7a06a3 | 256 | static const char **charset_enum; |
234b45d4 | 257 | |
6c7a06a3 TT |
258 | \f |
259 | /* If the target wide character set has big- or little-endian | |
260 | variants, these are the corresponding names. */ | |
261 | static const char *target_wide_charset_be_name; | |
262 | static const char *target_wide_charset_le_name; | |
234b45d4 | 263 | |
f870a310 TT |
264 | /* The architecture for which the BE- and LE-names are valid. */ |
265 | static struct gdbarch *be_le_arch; | |
266 | ||
267 | /* A helper function which sets the target wide big- and little-endian | |
268 | character set names, if possible. */ | |
234b45d4 | 269 | |
6c7a06a3 | 270 | static void |
f870a310 | 271 | set_be_le_names (struct gdbarch *gdbarch) |
234b45d4 | 272 | { |
6c7a06a3 | 273 | int i, len; |
f870a310 TT |
274 | const char *target_wide; |
275 | ||
276 | if (be_le_arch == gdbarch) | |
277 | return; | |
278 | be_le_arch = gdbarch; | |
234b45d4 | 279 | |
6c7a06a3 TT |
280 | target_wide_charset_le_name = NULL; |
281 | target_wide_charset_be_name = NULL; | |
234b45d4 | 282 | |
f870a310 TT |
283 | target_wide = target_wide_charset_name; |
284 | if (!strcmp (target_wide, "auto")) | |
285 | target_wide = gdbarch_auto_wide_charset (gdbarch); | |
286 | ||
287 | len = strlen (target_wide); | |
6c7a06a3 TT |
288 | for (i = 0; charset_enum[i]; ++i) |
289 | { | |
f870a310 | 290 | if (strncmp (target_wide, charset_enum[i], len)) |
6c7a06a3 TT |
291 | continue; |
292 | if ((charset_enum[i][len] == 'B' | |
293 | || charset_enum[i][len] == 'L') | |
294 | && charset_enum[i][len + 1] == 'E' | |
295 | && charset_enum[i][len + 2] == '\0') | |
296 | { | |
297 | if (charset_enum[i][len] == 'B') | |
298 | target_wide_charset_be_name = charset_enum[i]; | |
299 | else | |
300 | target_wide_charset_le_name = charset_enum[i]; | |
301 | } | |
302 | } | |
234b45d4 KB |
303 | } |
304 | ||
6c7a06a3 TT |
305 | /* 'Set charset', 'set host-charset', 'set target-charset', 'set |
306 | target-wide-charset', 'set charset' sfunc's. */ | |
234b45d4 KB |
307 | |
308 | static void | |
f870a310 | 309 | validate (struct gdbarch *gdbarch) |
234b45d4 | 310 | { |
6c7a06a3 TT |
311 | iconv_t desc; |
312 | const char *host_cset = host_charset (); | |
f870a310 TT |
313 | const char *target_cset = target_charset (gdbarch); |
314 | const char *target_wide_cset = target_wide_charset_name; | |
315 | if (!strcmp (target_wide_cset, "auto")) | |
316 | target_wide_cset = gdbarch_auto_wide_charset (gdbarch); | |
234b45d4 | 317 | |
f870a310 | 318 | desc = iconv_open (target_wide_cset, host_cset); |
6c7a06a3 TT |
319 | if (desc == (iconv_t) -1) |
320 | error ("Cannot convert between character sets `%s' and `%s'", | |
f870a310 | 321 | target_wide_cset, host_cset); |
6c7a06a3 | 322 | iconv_close (desc); |
234b45d4 | 323 | |
f870a310 | 324 | desc = iconv_open (target_cset, host_cset); |
6c7a06a3 TT |
325 | if (desc == (iconv_t) -1) |
326 | error ("Cannot convert between character sets `%s' and `%s'", | |
f870a310 | 327 | target_cset, host_cset); |
6c7a06a3 | 328 | iconv_close (desc); |
234b45d4 | 329 | |
f870a310 TT |
330 | /* Clear the cache. */ |
331 | be_le_arch = NULL; | |
234b45d4 KB |
332 | } |
333 | ||
6c7a06a3 TT |
334 | /* This is the sfunc for the 'set charset' command. */ |
335 | static void | |
336 | set_charset_sfunc (char *charset, int from_tty, struct cmd_list_element *c) | |
234b45d4 | 337 | { |
6c7a06a3 TT |
338 | /* CAREFUL: set the target charset here as well. */ |
339 | target_charset_name = host_charset_name; | |
f870a310 | 340 | validate (get_current_arch ()); |
234b45d4 KB |
341 | } |
342 | ||
6c7a06a3 TT |
343 | /* 'set host-charset' command sfunc. We need a wrapper here because |
344 | the function needs to have a specific signature. */ | |
345 | static void | |
346 | set_host_charset_sfunc (char *charset, int from_tty, | |
347 | struct cmd_list_element *c) | |
234b45d4 | 348 | { |
f870a310 | 349 | validate (get_current_arch ()); |
234b45d4 KB |
350 | } |
351 | ||
6c7a06a3 TT |
352 | /* Wrapper for the 'set target-charset' command. */ |
353 | static void | |
354 | set_target_charset_sfunc (char *charset, int from_tty, | |
355 | struct cmd_list_element *c) | |
234b45d4 | 356 | { |
f870a310 | 357 | validate (get_current_arch ()); |
234b45d4 KB |
358 | } |
359 | ||
6c7a06a3 TT |
360 | /* Wrapper for the 'set target-wide-charset' command. */ |
361 | static void | |
362 | set_target_wide_charset_sfunc (char *charset, int from_tty, | |
363 | struct cmd_list_element *c) | |
234b45d4 | 364 | { |
f870a310 | 365 | validate (get_current_arch ()); |
234b45d4 KB |
366 | } |
367 | ||
6c7a06a3 TT |
368 | /* sfunc for the 'show charset' command. */ |
369 | static void | |
370 | show_charset (struct ui_file *file, int from_tty, struct cmd_list_element *c, | |
371 | const char *name) | |
234b45d4 | 372 | { |
6c7a06a3 TT |
373 | show_host_charset_name (file, from_tty, c, host_charset_name); |
374 | show_target_charset_name (file, from_tty, c, target_charset_name); | |
375 | show_target_wide_charset_name (file, from_tty, c, target_wide_charset_name); | |
234b45d4 KB |
376 | } |
377 | ||
234b45d4 | 378 | \f |
6c7a06a3 | 379 | /* Accessor functions. */ |
234b45d4 | 380 | |
6c7a06a3 TT |
381 | const char * |
382 | host_charset (void) | |
234b45d4 | 383 | { |
6c7a06a3 TT |
384 | if (!strcmp (host_charset_name, "auto")) |
385 | return auto_host_charset_name; | |
386 | return host_charset_name; | |
234b45d4 KB |
387 | } |
388 | ||
6c7a06a3 | 389 | const char * |
f870a310 | 390 | target_charset (struct gdbarch *gdbarch) |
234b45d4 | 391 | { |
f870a310 TT |
392 | if (!strcmp (target_charset_name, "auto")) |
393 | return gdbarch_auto_charset (gdbarch); | |
6c7a06a3 | 394 | return target_charset_name; |
234b45d4 | 395 | } |
234b45d4 | 396 | |
6c7a06a3 | 397 | const char * |
f870a310 | 398 | target_wide_charset (struct gdbarch *gdbarch) |
234b45d4 | 399 | { |
f870a310 TT |
400 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
401 | ||
402 | set_be_le_names (gdbarch); | |
e17a4113 | 403 | if (byte_order == BFD_ENDIAN_BIG) |
234b45d4 | 404 | { |
6c7a06a3 TT |
405 | if (target_wide_charset_be_name) |
406 | return target_wide_charset_be_name; | |
234b45d4 | 407 | } |
6c7a06a3 | 408 | else |
234b45d4 | 409 | { |
6c7a06a3 TT |
410 | if (target_wide_charset_le_name) |
411 | return target_wide_charset_le_name; | |
234b45d4 KB |
412 | } |
413 | ||
f870a310 TT |
414 | if (!strcmp (target_wide_charset_name, "auto")) |
415 | return gdbarch_auto_wide_charset (gdbarch); | |
416 | ||
6c7a06a3 | 417 | return target_wide_charset_name; |
234b45d4 KB |
418 | } |
419 | ||
234b45d4 | 420 | \f |
6c7a06a3 TT |
421 | /* Host character set management. For the time being, we assume that |
422 | the host character set is some superset of ASCII. */ | |
234b45d4 | 423 | |
6c7a06a3 TT |
424 | char |
425 | host_letter_to_control_character (char c) | |
234b45d4 | 426 | { |
6c7a06a3 TT |
427 | if (c == '?') |
428 | return 0177; | |
429 | return c & 0237; | |
234b45d4 KB |
430 | } |
431 | ||
6c7a06a3 TT |
432 | /* Convert a host character, C, to its hex value. C must already have |
433 | been validated using isxdigit. */ | |
234b45d4 | 434 | |
6c7a06a3 TT |
435 | int |
436 | host_hex_value (char c) | |
234b45d4 | 437 | { |
6c7a06a3 TT |
438 | if (isdigit (c)) |
439 | return c - '0'; | |
440 | if (c >= 'a' && c <= 'f') | |
441 | return 10 + c - 'a'; | |
442 | gdb_assert (c >= 'A' && c <= 'F'); | |
443 | return 10 + c - 'A'; | |
234b45d4 KB |
444 | } |
445 | ||
234b45d4 | 446 | \f |
6c7a06a3 | 447 | /* Public character management functions. */ |
234b45d4 | 448 | |
6c7a06a3 | 449 | /* A cleanup function which is run to close an iconv descriptor. */ |
234b45d4 | 450 | |
6c7a06a3 TT |
451 | static void |
452 | cleanup_iconv (void *p) | |
234b45d4 | 453 | { |
6c7a06a3 TT |
454 | iconv_t *descp = p; |
455 | iconv_close (*descp); | |
234b45d4 KB |
456 | } |
457 | ||
6c7a06a3 TT |
458 | void |
459 | convert_between_encodings (const char *from, const char *to, | |
460 | const gdb_byte *bytes, unsigned int num_bytes, | |
461 | int width, struct obstack *output, | |
462 | enum transliterations translit) | |
463 | { | |
464 | iconv_t desc; | |
465 | struct cleanup *cleanups; | |
466 | size_t inleft; | |
467 | char *inp; | |
468 | unsigned int space_request; | |
469 | ||
470 | /* Often, the host and target charsets will be the same. */ | |
471 | if (!strcmp (from, to)) | |
472 | { | |
473 | obstack_grow (output, bytes, num_bytes); | |
474 | return; | |
475 | } | |
234b45d4 | 476 | |
6c7a06a3 TT |
477 | desc = iconv_open (to, from); |
478 | if (desc == (iconv_t) -1) | |
479 | perror_with_name ("Converting character sets"); | |
480 | cleanups = make_cleanup (cleanup_iconv, &desc); | |
234b45d4 | 481 | |
6c7a06a3 TT |
482 | inleft = num_bytes; |
483 | inp = (char *) bytes; | |
234b45d4 | 484 | |
6c7a06a3 | 485 | space_request = num_bytes; |
234b45d4 | 486 | |
6c7a06a3 | 487 | while (inleft > 0) |
234b45d4 | 488 | { |
6c7a06a3 TT |
489 | char *outp; |
490 | size_t outleft, r; | |
491 | int old_size; | |
492 | ||
493 | old_size = obstack_object_size (output); | |
494 | obstack_blank (output, space_request); | |
495 | ||
496 | outp = obstack_base (output) + old_size; | |
497 | outleft = space_request; | |
498 | ||
0dd7fb99 | 499 | r = iconv (desc, (ICONV_CONST char **) &inp, &inleft, &outp, &outleft); |
6c7a06a3 TT |
500 | |
501 | /* Now make sure that the object on the obstack only includes | |
502 | bytes we have converted. */ | |
503 | obstack_blank (output, - (int) outleft); | |
504 | ||
505 | if (r == (size_t) -1) | |
506 | { | |
507 | switch (errno) | |
508 | { | |
509 | case EILSEQ: | |
510 | { | |
511 | int i; | |
512 | ||
513 | /* Invalid input sequence. */ | |
514 | if (translit == translit_none) | |
515 | error (_("Could not convert character to `%s' character set"), | |
516 | to); | |
517 | ||
518 | /* We emit escape sequence for the bytes, skip them, | |
519 | and try again. */ | |
520 | for (i = 0; i < width; ++i) | |
521 | { | |
522 | char octal[5]; | |
523 | ||
524 | sprintf (octal, "\\%.3o", *inp & 0xff); | |
525 | obstack_grow_str (output, octal); | |
526 | ||
527 | ++inp; | |
528 | --inleft; | |
529 | } | |
530 | } | |
531 | break; | |
532 | ||
533 | case E2BIG: | |
534 | /* We ran out of space in the output buffer. Make it | |
535 | bigger next time around. */ | |
536 | space_request *= 2; | |
537 | break; | |
538 | ||
539 | case EINVAL: | |
540 | /* Incomplete input sequence. FIXME: ought to report this | |
541 | to the caller somehow. */ | |
542 | inleft = 0; | |
543 | break; | |
544 | ||
545 | default: | |
546 | perror_with_name ("Internal error while converting character sets"); | |
547 | } | |
548 | } | |
234b45d4 | 549 | } |
234b45d4 | 550 | |
6c7a06a3 | 551 | do_cleanups (cleanups); |
234b45d4 KB |
552 | } |
553 | ||
e33d66ec | 554 | \f |
e33d66ec | 555 | |
6c7a06a3 TT |
556 | /* An iterator that returns host wchar_t's from a target string. */ |
557 | struct wchar_iterator | |
e33d66ec | 558 | { |
6c7a06a3 TT |
559 | /* The underlying iconv descriptor. */ |
560 | iconv_t desc; | |
e33d66ec | 561 | |
6c7a06a3 TT |
562 | /* The input string. This is updated as convert characters. */ |
563 | char *input; | |
564 | /* The number of bytes remaining in the input. */ | |
565 | size_t bytes; | |
e33d66ec | 566 | |
6c7a06a3 TT |
567 | /* The width of an input character. */ |
568 | size_t width; | |
e33d66ec | 569 | |
6c7a06a3 TT |
570 | /* The output buffer and its size. */ |
571 | gdb_wchar_t *out; | |
572 | size_t out_size; | |
573 | }; | |
234b45d4 | 574 | |
6c7a06a3 TT |
575 | /* Create a new iterator. */ |
576 | struct wchar_iterator * | |
577 | make_wchar_iterator (const gdb_byte *input, size_t bytes, const char *charset, | |
578 | size_t width) | |
234b45d4 | 579 | { |
6c7a06a3 TT |
580 | struct wchar_iterator *result; |
581 | iconv_t desc; | |
234b45d4 | 582 | |
732f6a93 | 583 | desc = iconv_open (INTERMEDIATE_ENCODING, charset); |
6c7a06a3 TT |
584 | if (desc == (iconv_t) -1) |
585 | perror_with_name ("Converting character sets"); | |
234b45d4 | 586 | |
6c7a06a3 TT |
587 | result = XNEW (struct wchar_iterator); |
588 | result->desc = desc; | |
589 | result->input = (char *) input; | |
590 | result->bytes = bytes; | |
591 | result->width = width; | |
234b45d4 | 592 | |
6c7a06a3 TT |
593 | result->out = XNEW (gdb_wchar_t); |
594 | result->out_size = 1; | |
234b45d4 | 595 | |
6c7a06a3 | 596 | return result; |
e33d66ec | 597 | } |
234b45d4 | 598 | |
e33d66ec | 599 | static void |
6c7a06a3 | 600 | do_cleanup_iterator (void *p) |
e33d66ec | 601 | { |
6c7a06a3 | 602 | struct wchar_iterator *iter = p; |
234b45d4 | 603 | |
6c7a06a3 TT |
604 | iconv_close (iter->desc); |
605 | xfree (iter->out); | |
606 | xfree (iter); | |
234b45d4 KB |
607 | } |
608 | ||
6c7a06a3 TT |
609 | struct cleanup * |
610 | make_cleanup_wchar_iterator (struct wchar_iterator *iter) | |
e33d66ec | 611 | { |
6c7a06a3 | 612 | return make_cleanup (do_cleanup_iterator, iter); |
e33d66ec | 613 | } |
234b45d4 | 614 | |
6c7a06a3 TT |
615 | int |
616 | wchar_iterate (struct wchar_iterator *iter, | |
617 | enum wchar_iterate_result *out_result, | |
618 | gdb_wchar_t **out_chars, | |
619 | const gdb_byte **ptr, | |
620 | size_t *len) | |
621 | { | |
622 | size_t out_request; | |
623 | ||
624 | /* Try to convert some characters. At first we try to convert just | |
625 | a single character. The reason for this is that iconv does not | |
626 | necessarily update its outgoing arguments when it encounters an | |
627 | invalid input sequence -- but we want to reliably report this to | |
628 | our caller so it can emit an escape sequence. */ | |
629 | out_request = 1; | |
630 | while (iter->bytes > 0) | |
e33d66ec | 631 | { |
6c7a06a3 TT |
632 | char *outptr = (char *) &iter->out[0]; |
633 | char *orig_inptr = iter->input; | |
634 | size_t orig_in = iter->bytes; | |
635 | size_t out_avail = out_request * sizeof (gdb_wchar_t); | |
636 | size_t num; | |
637 | gdb_wchar_t result; | |
638 | ||
0dd7fb99 TT |
639 | size_t r = iconv (iter->desc, |
640 | (ICONV_CONST char **) &iter->input, &iter->bytes, | |
6c7a06a3 TT |
641 | &outptr, &out_avail); |
642 | if (r == (size_t) -1) | |
643 | { | |
644 | switch (errno) | |
645 | { | |
646 | case EILSEQ: | |
647 | /* Invalid input sequence. Skip it, and let the caller | |
648 | know about it. */ | |
649 | *out_result = wchar_iterate_invalid; | |
650 | *ptr = iter->input; | |
651 | *len = iter->width; | |
652 | iter->input += iter->width; | |
653 | iter->bytes -= iter->width; | |
654 | return 0; | |
655 | ||
656 | case E2BIG: | |
657 | /* We ran out of space. We still might have converted a | |
658 | character; if so, return it. Otherwise, grow the | |
659 | buffer and try again. */ | |
660 | if (out_avail < out_request * sizeof (gdb_wchar_t)) | |
661 | break; | |
662 | ||
663 | ++out_request; | |
664 | if (out_request > iter->out_size) | |
665 | { | |
666 | iter->out_size = out_request; | |
667 | iter->out = xrealloc (iter->out, | |
668 | out_request * sizeof (gdb_wchar_t)); | |
669 | } | |
670 | continue; | |
671 | ||
672 | case EINVAL: | |
673 | /* Incomplete input sequence. Let the caller know, and | |
674 | arrange for future calls to see EOF. */ | |
675 | *out_result = wchar_iterate_incomplete; | |
676 | *ptr = iter->input; | |
677 | *len = iter->bytes; | |
678 | iter->bytes = 0; | |
679 | return 0; | |
680 | ||
681 | default: | |
682 | perror_with_name ("Internal error while converting character sets"); | |
683 | } | |
684 | } | |
685 | ||
686 | /* We converted something. */ | |
687 | num = out_request - out_avail / sizeof (gdb_wchar_t); | |
688 | *out_result = wchar_iterate_ok; | |
689 | *out_chars = iter->out; | |
690 | *ptr = orig_inptr; | |
691 | *len = orig_in - iter->bytes; | |
692 | return num; | |
e33d66ec | 693 | } |
6c7a06a3 TT |
694 | |
695 | /* Really done. */ | |
696 | *out_result = wchar_iterate_eof; | |
697 | return -1; | |
234b45d4 KB |
698 | } |
699 | ||
e33d66ec | 700 | \f |
6c7a06a3 | 701 | /* The charset.c module initialization function. */ |
234b45d4 | 702 | |
6c7a06a3 | 703 | extern initialize_file_ftype _initialize_charset; /* -Wmissing-prototype */ |
234b45d4 | 704 | |
6c7a06a3 TT |
705 | typedef char *char_ptr; |
706 | DEF_VEC_P (char_ptr); | |
234b45d4 | 707 | |
6c7a06a3 | 708 | static VEC (char_ptr) *charsets; |
234b45d4 | 709 | |
6c7a06a3 | 710 | #ifdef PHONY_ICONV |
234b45d4 | 711 | |
6c7a06a3 TT |
712 | static void |
713 | find_charset_names (void) | |
234b45d4 | 714 | { |
6c7a06a3 TT |
715 | VEC_safe_push (char_ptr, charsets, GDB_DEFAULT_HOST_CHARSET); |
716 | VEC_safe_push (char_ptr, charsets, NULL); | |
234b45d4 KB |
717 | } |
718 | ||
6c7a06a3 | 719 | #else /* PHONY_ICONV */ |
fc3b640d TT |
720 | |
721 | /* Sometimes, libiconv redefines iconvlist as libiconvlist -- but | |
722 | provides different symbols in the static and dynamic libraries. | |
723 | So, configure may see libiconvlist but not iconvlist. But, calling | |
724 | iconvlist is the right thing to do and will work. Hence we do a | |
725 | check here but unconditionally call iconvlist below. */ | |
726 | #if defined (HAVE_ICONVLIST) || defined (HAVE_LIBICONVLIST) | |
234b45d4 | 727 | |
6c7a06a3 TT |
728 | /* A helper function that adds some character sets to the vector of |
729 | all character sets. This is a callback function for iconvlist. */ | |
730 | ||
731 | static int | |
732 | add_one (unsigned int count, const char *const *names, void *data) | |
234b45d4 | 733 | { |
6c7a06a3 | 734 | unsigned int i; |
234b45d4 | 735 | |
6c7a06a3 TT |
736 | for (i = 0; i < count; ++i) |
737 | VEC_safe_push (char_ptr, charsets, xstrdup (names[i])); | |
234b45d4 | 738 | |
6c7a06a3 | 739 | return 0; |
234b45d4 KB |
740 | } |
741 | ||
6c7a06a3 TT |
742 | static void |
743 | find_charset_names (void) | |
234b45d4 | 744 | { |
6c7a06a3 TT |
745 | iconvlist (add_one, NULL); |
746 | VEC_safe_push (char_ptr, charsets, NULL); | |
234b45d4 KB |
747 | } |
748 | ||
6c7a06a3 | 749 | #else |
234b45d4 | 750 | |
40b5c9fb DE |
751 | /* Return non-zero if LINE (output from iconv) should be ignored. |
752 | Older iconv programs (e.g. 2.2.2) include the human readable | |
753 | introduction even when stdout is not a tty. Newer versions omit | |
754 | the intro if stdout is not a tty. */ | |
755 | ||
756 | static int | |
757 | ignore_line_p (const char *line) | |
758 | { | |
759 | /* This table is used to filter the output. If this text appears | |
760 | anywhere in the line, it is ignored (strstr is used). */ | |
761 | static const char * const ignore_lines[] = | |
762 | { | |
763 | "The following", | |
764 | "not necessarily", | |
765 | "the FROM and TO", | |
766 | "listed with several", | |
767 | NULL | |
768 | }; | |
769 | int i; | |
770 | ||
771 | for (i = 0; ignore_lines[i] != NULL; ++i) | |
772 | { | |
773 | if (strstr (line, ignore_lines[i]) != NULL) | |
774 | return 1; | |
775 | } | |
776 | ||
777 | return 0; | |
778 | } | |
779 | ||
6c7a06a3 TT |
780 | static void |
781 | find_charset_names (void) | |
234b45d4 | 782 | { |
732f6a93 TT |
783 | struct pex_obj *child; |
784 | char *args[3]; | |
785 | int err, status; | |
786 | int fail = 1; | |
40b5c9fb DE |
787 | struct gdb_environ *iconv_env; |
788 | ||
789 | /* Older iconvs, e.g. 2.2.2, don't omit the intro text if stdout is not | |
790 | a tty. We need to recognize it and ignore it. This text is subject | |
791 | to translation, so force LANGUAGE=C. */ | |
792 | iconv_env = make_environ (); | |
793 | init_environ (iconv_env); | |
794 | set_in_environ (iconv_env, "LANGUAGE", "C"); | |
795 | set_in_environ (iconv_env, "LC_ALL", "C"); | |
732f6a93 TT |
796 | |
797 | child = pex_init (0, "iconv", NULL); | |
798 | ||
799 | args[0] = "iconv"; | |
800 | args[1] = "-l"; | |
801 | args[2] = NULL; | |
802 | /* Note that we simply ignore errors here. */ | |
40b5c9fb DE |
803 | if (!pex_run_in_environment (child, PEX_SEARCH | PEX_STDERR_TO_STDOUT, |
804 | "iconv", args, environ_vector (iconv_env), | |
805 | NULL, NULL, &err)) | |
732f6a93 TT |
806 | { |
807 | FILE *in = pex_read_output (child, 0); | |
808 | ||
809 | /* POSIX says that iconv -l uses an unspecified format. We | |
810 | parse the glibc and libiconv formats; feel free to add others | |
811 | as needed. */ | |
40b5c9fb | 812 | |
732f6a93 TT |
813 | while (!feof (in)) |
814 | { | |
815 | /* The size of buf is chosen arbitrarily. */ | |
816 | char buf[1024]; | |
817 | char *start, *r; | |
818 | int len, keep_going; | |
819 | ||
820 | r = fgets (buf, sizeof (buf), in); | |
821 | if (!r) | |
822 | break; | |
823 | len = strlen (r); | |
824 | if (len <= 3) | |
825 | continue; | |
40b5c9fb DE |
826 | if (ignore_line_p (r)) |
827 | continue; | |
828 | ||
732f6a93 TT |
829 | /* Strip off the newline. */ |
830 | --len; | |
831 | /* Strip off one or two '/'s. glibc will print lines like | |
832 | "8859_7//", but also "10646-1:1993/UCS4/". */ | |
833 | if (buf[len - 1] == '/') | |
834 | --len; | |
835 | if (buf[len - 1] == '/') | |
836 | --len; | |
837 | buf[len] = '\0'; | |
838 | ||
839 | /* libiconv will print multiple entries per line, separated | |
40b5c9fb DE |
840 | by spaces. Older iconvs will print multiple entries per line, |
841 | indented by two spaces, and separated by ", " | |
842 | (i.e. the human readable form). */ | |
732f6a93 TT |
843 | start = buf; |
844 | while (1) | |
845 | { | |
846 | int keep_going; | |
847 | char *p; | |
848 | ||
40b5c9fb DE |
849 | /* Skip leading blanks. */ |
850 | for (p = start; *p && *p == ' '; ++p) | |
851 | ; | |
852 | start = p; | |
853 | /* Find the next space, comma, or end-of-line. */ | |
854 | for ( ; *p && *p != ' ' && *p != ','; ++p) | |
732f6a93 TT |
855 | ; |
856 | /* Ignore an empty result. */ | |
857 | if (p == start) | |
858 | break; | |
859 | keep_going = *p; | |
860 | *p = '\0'; | |
861 | VEC_safe_push (char_ptr, charsets, xstrdup (start)); | |
862 | if (!keep_going) | |
863 | break; | |
864 | /* Skip any extra spaces. */ | |
865 | for (start = p + 1; *start && *start == ' '; ++start) | |
866 | ; | |
867 | } | |
868 | } | |
234b45d4 | 869 | |
732f6a93 TT |
870 | if (pex_get_status (child, 1, &status) |
871 | && WIFEXITED (status) && !WEXITSTATUS (status)) | |
872 | fail = 0; | |
234b45d4 | 873 | |
6c7a06a3 | 874 | } |
234b45d4 | 875 | |
732f6a93 | 876 | pex_free (child); |
40b5c9fb | 877 | free_environ (iconv_env); |
234b45d4 | 878 | |
732f6a93 TT |
879 | if (fail) |
880 | { | |
881 | /* Some error occurred, so drop the vector. */ | |
882 | int ix; | |
883 | char *elt; | |
884 | for (ix = 0; VEC_iterate (char_ptr, charsets, ix, elt); ++ix) | |
885 | xfree (elt); | |
886 | VEC_truncate (char_ptr, charsets, 0); | |
887 | } | |
888 | else | |
889 | VEC_safe_push (char_ptr, charsets, NULL); | |
6c7a06a3 | 890 | } |
234b45d4 | 891 | |
fc3b640d | 892 | #endif /* HAVE_ICONVLIST || HAVE_LIBICONVLIST */ |
6c7a06a3 | 893 | #endif /* PHONY_ICONV */ |
234b45d4 | 894 | |
f870a310 TT |
895 | /* The "auto" target charset used by default_auto_charset. */ |
896 | static const char *auto_target_charset_name = GDB_DEFAULT_TARGET_CHARSET; | |
897 | ||
898 | const char * | |
899 | default_auto_charset (void) | |
900 | { | |
901 | return auto_target_charset_name; | |
902 | } | |
903 | ||
904 | const char * | |
905 | default_auto_wide_charset (void) | |
906 | { | |
907 | return GDB_DEFAULT_TARGET_WIDE_CHARSET; | |
908 | } | |
909 | ||
234b45d4 KB |
910 | void |
911 | _initialize_charset (void) | |
912 | { | |
e33d66ec EZ |
913 | struct cmd_list_element *new_cmd; |
914 | ||
f870a310 | 915 | /* The first element is always "auto". */ |
732f6a93 | 916 | VEC_safe_push (char_ptr, charsets, xstrdup ("auto")); |
6c7a06a3 TT |
917 | find_charset_names (); |
918 | ||
919 | if (VEC_length (char_ptr, charsets) > 1) | |
920 | charset_enum = (const char **) VEC_address (char_ptr, charsets); | |
921 | else | |
922 | charset_enum = default_charset_names; | |
923 | ||
924 | #ifndef PHONY_ICONV | |
925 | #ifdef HAVE_LANGINFO_CODESET | |
f870a310 TT |
926 | /* The result of nl_langinfo may be overwritten later. This may |
927 | leak a little memory, if the user later changes the host charset, | |
928 | but that doesn't matter much. */ | |
929 | auto_host_charset_name = xstrdup (nl_langinfo (CODESET)); | |
58720494 | 930 | /* Solaris will return `646' here -- but the Solaris iconv then |
06be6983 TG |
931 | does not accept this. Darwin (and maybe FreeBSD) may return "" here, |
932 | which GNU libiconv doesn't like (infinite loop). */ | |
933 | if (!strcmp (auto_host_charset_name, "646") || !*auto_host_charset_name) | |
58720494 | 934 | auto_host_charset_name = "ASCII"; |
f870a310 TT |
935 | auto_target_charset_name = auto_host_charset_name; |
936 | #elif defined (USE_WIN32API) | |
937 | { | |
43484f03 | 938 | static char w32_host_default_charset[16]; /* "CP" + x<=5 digits + paranoia. */ |
f870a310 TT |
939 | |
940 | snprintf (w32_host_default_charset, sizeof w32_host_default_charset, | |
941 | "CP%d", GetACP()); | |
942 | auto_host_charset_name = w32_host_default_charset; | |
943 | auto_target_charset_name = auto_host_charset_name; | |
944 | } | |
6c7a06a3 TT |
945 | #endif |
946 | #endif | |
e33d66ec | 947 | |
7ab04401 | 948 | add_setshow_enum_cmd ("charset", class_support, |
f870a310 | 949 | charset_enum, &host_charset_name, _("\ |
7ab04401 AC |
950 | Set the host and target character sets."), _("\ |
951 | Show the host and target character sets."), _("\ | |
3d263c1d BI |
952 | The `host character set' is the one used by the system GDB is running on.\n\ |
953 | The `target character set' is the one used by the program being debugged.\n\ | |
954 | You may only use supersets of ASCII for your host character set; GDB does\n\ | |
955 | not support any others.\n\ | |
956 | To see a list of the character sets GDB supports, type `set charset <TAB>'."), | |
7ab04401 AC |
957 | /* Note that the sfunc below needs to set |
958 | target_charset_name, because the 'set | |
959 | charset' command sets two variables. */ | |
960 | set_charset_sfunc, | |
961 | show_charset, | |
962 | &setlist, &showlist); | |
963 | ||
964 | add_setshow_enum_cmd ("host-charset", class_support, | |
6c7a06a3 | 965 | charset_enum, &host_charset_name, _("\ |
7ab04401 AC |
966 | Set the host character set."), _("\ |
967 | Show the host character set."), _("\ | |
3d263c1d BI |
968 | The `host character set' is the one used by the system GDB is running on.\n\ |
969 | You may only use supersets of ASCII for your host character set; GDB does\n\ | |
970 | not support any others.\n\ | |
971 | To see a list of the character sets GDB supports, type `set host-charset <TAB>'."), | |
7ab04401 | 972 | set_host_charset_sfunc, |
920d2a44 | 973 | show_host_charset_name, |
7ab04401 AC |
974 | &setlist, &showlist); |
975 | ||
976 | add_setshow_enum_cmd ("target-charset", class_support, | |
f870a310 | 977 | charset_enum, &target_charset_name, _("\ |
7ab04401 AC |
978 | Set the target character set."), _("\ |
979 | Show the target character set."), _("\ | |
3d263c1d BI |
980 | The `target character set' is the one used by the program being debugged.\n\ |
981 | GDB translates characters and strings between the host and target\n\ | |
982 | character sets as needed.\n\ | |
983 | To see a list of the character sets GDB supports, type `set target-charset'<TAB>"), | |
7ab04401 | 984 | set_target_charset_sfunc, |
920d2a44 | 985 | show_target_charset_name, |
7ab04401 | 986 | &setlist, &showlist); |
6c7a06a3 TT |
987 | |
988 | add_setshow_enum_cmd ("target-wide-charset", class_support, | |
f870a310 | 989 | charset_enum, &target_wide_charset_name, |
6c7a06a3 TT |
990 | _("\ |
991 | Set the target wide character set."), _("\ | |
992 | Show the target wide character set."), _("\ | |
993 | The `target wide character set' is the one used by the program being debugged.\n\ | |
994 | In particular it is the encoding used by `wchar_t'.\n\ | |
995 | GDB translates characters and strings between the host and target\n\ | |
996 | character sets as needed.\n\ | |
997 | To see a list of the character sets GDB supports, type\n\ | |
998 | `set target-wide-charset'<TAB>"), | |
999 | set_target_wide_charset_sfunc, | |
1000 | show_target_wide_charset_name, | |
1001 | &setlist, &showlist); | |
234b45d4 | 1002 | } |