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80a3b8c578
This introduces a new "iconv_wrapper" class, to be used in convert_between_encodings. This allows the removal of cleanup_iconv. gdb/ChangeLog 2017-04-12 Tom Tromey <tom@tromey.com> * charset.c (iconv_wrapper): New class. (cleanup_iconv): Remove. (convert_between_encodings): Use it.
1091 lines
29 KiB
C
1091 lines
29 KiB
C
/* Character set conversion support for GDB.
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Copyright (C) 2001-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "charset.h"
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#include "gdbcmd.h"
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#include "gdb_obstack.h"
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#include "gdb_wait.h"
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#include "charset-list.h"
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#include "vec.h"
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#include "environ.h"
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#include "arch-utils.h"
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#include "gdb_vecs.h"
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#include <ctype.h>
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#ifdef USE_WIN32API
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#include <windows.h>
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#endif
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/* How GDB's character set support works
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GDB has three global settings:
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- The `current host character set' is the character set GDB should
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use in talking to the user, and which (hopefully) the user's
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terminal knows how to display properly. Most users should not
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change this.
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- The `current target character set' is the character set the
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program being debugged uses.
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- The `current target wide character set' is the wide character set
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the program being debugged uses, that is, the encoding used for
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wchar_t.
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There are commands to set each of these, and mechanisms for
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choosing reasonable default values. GDB has a global list of
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character sets that it can use as its host or target character
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sets.
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The header file `charset.h' declares various functions that
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different pieces of GDB need to perform tasks like:
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- printing target strings and characters to the user's terminal
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(mostly target->host conversions),
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- building target-appropriate representations of strings and
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characters the user enters in expressions (mostly host->target
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conversions),
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and so on.
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To avoid excessive code duplication and maintenance efforts,
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GDB simply requires a capable iconv function. Users on platforms
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without a suitable iconv can use the GNU iconv library. */
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#ifdef PHONY_ICONV
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/* Provide a phony iconv that does as little as possible. Also,
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arrange for there to be a single available character set. */
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#undef GDB_DEFAULT_HOST_CHARSET
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#ifdef USE_WIN32API
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# define GDB_DEFAULT_HOST_CHARSET "CP1252"
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#else
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# define GDB_DEFAULT_HOST_CHARSET "ISO-8859-1"
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#endif
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#define GDB_DEFAULT_TARGET_CHARSET GDB_DEFAULT_HOST_CHARSET
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#define GDB_DEFAULT_TARGET_WIDE_CHARSET "UTF-32"
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#undef DEFAULT_CHARSET_NAMES
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#define DEFAULT_CHARSET_NAMES GDB_DEFAULT_HOST_CHARSET ,
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#undef iconv_t
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#define iconv_t int
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#undef iconv_open
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#define iconv_open phony_iconv_open
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#undef iconv
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#define iconv phony_iconv
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#undef iconv_close
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#define iconv_close phony_iconv_close
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#undef ICONV_CONST
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#define ICONV_CONST const
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/* We allow conversions from UTF-32, wchar_t, and the host charset.
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We allow conversions to wchar_t and the host charset.
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Return 1 if we are converting from UTF-32BE, 2 if from UTF32-LE,
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0 otherwise. This is used as a flag in calls to iconv. */
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static iconv_t
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phony_iconv_open (const char *to, const char *from)
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{
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if (strcmp (to, "wchar_t") && strcmp (to, GDB_DEFAULT_HOST_CHARSET))
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return -1;
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if (!strcmp (from, "UTF-32BE") || !strcmp (from, "UTF-32"))
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return 1;
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if (!strcmp (from, "UTF-32LE"))
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return 2;
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if (strcmp (from, "wchar_t") && strcmp (from, GDB_DEFAULT_HOST_CHARSET))
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return -1;
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return 0;
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}
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static int
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phony_iconv_close (iconv_t arg)
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{
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return 0;
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}
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static size_t
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phony_iconv (iconv_t utf_flag, const char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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{
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if (utf_flag)
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{
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enum bfd_endian endian
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= utf_flag == 1 ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
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while (*inbytesleft >= 4)
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{
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unsigned long c
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= extract_unsigned_integer ((const gdb_byte *)*inbuf, 4, endian);
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if (c >= 256)
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{
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errno = EILSEQ;
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return -1;
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}
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if (*outbytesleft < 1)
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{
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errno = E2BIG;
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return -1;
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}
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**outbuf = c & 0xff;
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++*outbuf;
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--*outbytesleft;
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*inbuf += 4;
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*inbytesleft -= 4;
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}
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if (*inbytesleft)
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{
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/* Partial sequence on input. */
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errno = EINVAL;
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return -1;
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}
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}
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else
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{
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/* In all other cases we simply copy input bytes to the
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output. */
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size_t amt = *inbytesleft;
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if (amt > *outbytesleft)
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amt = *outbytesleft;
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memcpy (*outbuf, *inbuf, amt);
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*inbuf += amt;
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*outbuf += amt;
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*inbytesleft -= amt;
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*outbytesleft -= amt;
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if (*inbytesleft)
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{
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errno = E2BIG;
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return -1;
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}
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}
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/* The number of non-reversible conversions -- but they were all
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reversible. */
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return 0;
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}
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#else /* PHONY_ICONV */
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/* On systems that don't have EILSEQ, GNU iconv's iconv.h defines it
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to ENOENT, while gnulib defines it to a different value. Always
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map ENOENT to gnulib's EILSEQ, leaving callers agnostic. */
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static size_t
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gdb_iconv (iconv_t utf_flag, ICONV_CONST char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft)
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{
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size_t ret;
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ret = iconv (utf_flag, inbuf, inbytesleft, outbuf, outbytesleft);
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if (errno == ENOENT)
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errno = EILSEQ;
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return ret;
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}
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#undef iconv
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#define iconv gdb_iconv
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#endif /* PHONY_ICONV */
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/* The global lists of character sets and translations. */
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#ifndef GDB_DEFAULT_TARGET_CHARSET
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#define GDB_DEFAULT_TARGET_CHARSET "ISO-8859-1"
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#endif
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#ifndef GDB_DEFAULT_TARGET_WIDE_CHARSET
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#define GDB_DEFAULT_TARGET_WIDE_CHARSET "UTF-32"
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#endif
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static const char *auto_host_charset_name = GDB_DEFAULT_HOST_CHARSET;
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static const char *host_charset_name = "auto";
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static void
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show_host_charset_name (struct ui_file *file, int from_tty,
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struct cmd_list_element *c,
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const char *value)
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{
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if (!strcmp (value, "auto"))
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fprintf_filtered (file,
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_("The host character set is \"auto; currently %s\".\n"),
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auto_host_charset_name);
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else
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fprintf_filtered (file, _("The host character set is \"%s\".\n"), value);
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}
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static const char *target_charset_name = "auto";
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static void
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show_target_charset_name (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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if (!strcmp (value, "auto"))
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fprintf_filtered (file,
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_("The target character set is \"auto; "
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"currently %s\".\n"),
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gdbarch_auto_charset (get_current_arch ()));
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else
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fprintf_filtered (file, _("The target character set is \"%s\".\n"),
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value);
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}
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static const char *target_wide_charset_name = "auto";
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static void
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show_target_wide_charset_name (struct ui_file *file,
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int from_tty,
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struct cmd_list_element *c,
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const char *value)
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{
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if (!strcmp (value, "auto"))
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fprintf_filtered (file,
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_("The target wide character set is \"auto; "
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"currently %s\".\n"),
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gdbarch_auto_wide_charset (get_current_arch ()));
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else
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fprintf_filtered (file, _("The target wide character set is \"%s\".\n"),
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value);
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}
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static const char *default_charset_names[] =
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{
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DEFAULT_CHARSET_NAMES
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0
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};
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static const char **charset_enum;
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/* If the target wide character set has big- or little-endian
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variants, these are the corresponding names. */
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static const char *target_wide_charset_be_name;
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static const char *target_wide_charset_le_name;
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/* The architecture for which the BE- and LE-names are valid. */
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static struct gdbarch *be_le_arch;
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/* A helper function which sets the target wide big- and little-endian
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character set names, if possible. */
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static void
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set_be_le_names (struct gdbarch *gdbarch)
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{
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int i, len;
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const char *target_wide;
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if (be_le_arch == gdbarch)
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return;
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be_le_arch = gdbarch;
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#ifdef PHONY_ICONV
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/* Match the wide charset names recognized by phony_iconv_open. */
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target_wide_charset_le_name = "UTF-32LE";
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target_wide_charset_be_name = "UTF-32BE";
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#else
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target_wide_charset_le_name = NULL;
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target_wide_charset_be_name = NULL;
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target_wide = target_wide_charset_name;
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if (!strcmp (target_wide, "auto"))
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target_wide = gdbarch_auto_wide_charset (gdbarch);
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len = strlen (target_wide);
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for (i = 0; charset_enum[i]; ++i)
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{
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if (strncmp (target_wide, charset_enum[i], len))
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continue;
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if ((charset_enum[i][len] == 'B'
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|| charset_enum[i][len] == 'L')
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&& charset_enum[i][len + 1] == 'E'
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&& charset_enum[i][len + 2] == '\0')
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{
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if (charset_enum[i][len] == 'B')
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target_wide_charset_be_name = charset_enum[i];
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else
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target_wide_charset_le_name = charset_enum[i];
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}
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}
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# endif /* PHONY_ICONV */
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}
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/* 'Set charset', 'set host-charset', 'set target-charset', 'set
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target-wide-charset', 'set charset' sfunc's. */
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static void
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validate (struct gdbarch *gdbarch)
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{
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iconv_t desc;
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const char *host_cset = host_charset ();
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const char *target_cset = target_charset (gdbarch);
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const char *target_wide_cset = target_wide_charset_name;
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if (!strcmp (target_wide_cset, "auto"))
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target_wide_cset = gdbarch_auto_wide_charset (gdbarch);
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desc = iconv_open (target_wide_cset, host_cset);
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if (desc == (iconv_t) -1)
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error (_("Cannot convert between character sets `%s' and `%s'"),
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target_wide_cset, host_cset);
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iconv_close (desc);
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desc = iconv_open (target_cset, host_cset);
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if (desc == (iconv_t) -1)
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error (_("Cannot convert between character sets `%s' and `%s'"),
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target_cset, host_cset);
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iconv_close (desc);
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/* Clear the cache. */
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be_le_arch = NULL;
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}
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/* This is the sfunc for the 'set charset' command. */
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static void
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set_charset_sfunc (char *charset, int from_tty,
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struct cmd_list_element *c)
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{
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/* CAREFUL: set the target charset here as well. */
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target_charset_name = host_charset_name;
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validate (get_current_arch ());
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}
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/* 'set host-charset' command sfunc. We need a wrapper here because
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the function needs to have a specific signature. */
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static void
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set_host_charset_sfunc (char *charset, int from_tty,
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struct cmd_list_element *c)
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{
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validate (get_current_arch ());
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}
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/* Wrapper for the 'set target-charset' command. */
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static void
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set_target_charset_sfunc (char *charset, int from_tty,
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struct cmd_list_element *c)
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{
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validate (get_current_arch ());
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}
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/* Wrapper for the 'set target-wide-charset' command. */
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static void
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set_target_wide_charset_sfunc (char *charset, int from_tty,
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struct cmd_list_element *c)
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{
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validate (get_current_arch ());
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}
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/* sfunc for the 'show charset' command. */
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static void
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show_charset (struct ui_file *file, int from_tty,
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struct cmd_list_element *c,
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const char *name)
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{
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show_host_charset_name (file, from_tty, c, host_charset_name);
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show_target_charset_name (file, from_tty, c, target_charset_name);
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show_target_wide_charset_name (file, from_tty, c,
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target_wide_charset_name);
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}
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/* Accessor functions. */
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const char *
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host_charset (void)
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{
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if (!strcmp (host_charset_name, "auto"))
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return auto_host_charset_name;
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return host_charset_name;
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}
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const char *
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target_charset (struct gdbarch *gdbarch)
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{
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if (!strcmp (target_charset_name, "auto"))
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return gdbarch_auto_charset (gdbarch);
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return target_charset_name;
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}
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const char *
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target_wide_charset (struct gdbarch *gdbarch)
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{
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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set_be_le_names (gdbarch);
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if (byte_order == BFD_ENDIAN_BIG)
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{
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if (target_wide_charset_be_name)
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return target_wide_charset_be_name;
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}
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else
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{
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if (target_wide_charset_le_name)
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return target_wide_charset_le_name;
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}
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if (!strcmp (target_wide_charset_name, "auto"))
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return gdbarch_auto_wide_charset (gdbarch);
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return target_wide_charset_name;
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}
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/* Host character set management. For the time being, we assume that
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the host character set is some superset of ASCII. */
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char
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host_letter_to_control_character (char c)
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{
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if (c == '?')
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return 0177;
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return c & 0237;
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}
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/* Convert a host character, C, to its hex value. C must already have
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been validated using isxdigit. */
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int
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host_hex_value (char c)
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{
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if (isdigit (c))
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return c - '0';
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if (c >= 'a' && c <= 'f')
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return 10 + c - 'a';
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gdb_assert (c >= 'A' && c <= 'F');
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return 10 + c - 'A';
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||
}
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|
||
|
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/* Public character management functions. */
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class iconv_wrapper
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{
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||
public:
|
||
|
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iconv_wrapper (const char *to, const char *from)
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||
{
|
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m_desc = iconv_open (to, from);
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if (m_desc == (iconv_t) -1)
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perror_with_name (_("Converting character sets"));
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||
}
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~iconv_wrapper ()
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||
{
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iconv_close (m_desc);
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||
}
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||
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||
size_t convert (ICONV_CONST char **inp, size_t *inleft, char **outp,
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size_t *outleft)
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{
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return iconv (m_desc, inp, inleft, outp, outleft);
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}
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|
||
private:
|
||
|
||
iconv_t m_desc;
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};
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||
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||
void
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||
convert_between_encodings (const char *from, const char *to,
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||
const gdb_byte *bytes, unsigned int num_bytes,
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||
int width, struct obstack *output,
|
||
enum transliterations translit)
|
||
{
|
||
size_t inleft;
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||
ICONV_CONST char *inp;
|
||
unsigned int space_request;
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||
|
||
/* Often, the host and target charsets will be the same. */
|
||
if (!strcmp (from, to))
|
||
{
|
||
obstack_grow (output, bytes, num_bytes);
|
||
return;
|
||
}
|
||
|
||
iconv_wrapper desc (to, from);
|
||
|
||
inleft = num_bytes;
|
||
inp = (ICONV_CONST char *) bytes;
|
||
|
||
space_request = num_bytes;
|
||
|
||
while (inleft > 0)
|
||
{
|
||
char *outp;
|
||
size_t outleft, r;
|
||
int old_size;
|
||
|
||
old_size = obstack_object_size (output);
|
||
obstack_blank (output, space_request);
|
||
|
||
outp = (char *) obstack_base (output) + old_size;
|
||
outleft = space_request;
|
||
|
||
r = desc.convert (&inp, &inleft, &outp, &outleft);
|
||
|
||
/* Now make sure that the object on the obstack only includes
|
||
bytes we have converted. */
|
||
obstack_blank_fast (output, -outleft);
|
||
|
||
if (r == (size_t) -1)
|
||
{
|
||
switch (errno)
|
||
{
|
||
case EILSEQ:
|
||
{
|
||
int i;
|
||
|
||
/* Invalid input sequence. */
|
||
if (translit == translit_none)
|
||
error (_("Could not convert character "
|
||
"to `%s' character set"), to);
|
||
|
||
/* We emit escape sequence for the bytes, skip them,
|
||
and try again. */
|
||
for (i = 0; i < width; ++i)
|
||
{
|
||
char octal[5];
|
||
|
||
xsnprintf (octal, sizeof (octal), "\\%.3o", *inp & 0xff);
|
||
obstack_grow_str (output, octal);
|
||
|
||
++inp;
|
||
--inleft;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case E2BIG:
|
||
/* We ran out of space in the output buffer. Make it
|
||
bigger next time around. */
|
||
space_request *= 2;
|
||
break;
|
||
|
||
case EINVAL:
|
||
/* Incomplete input sequence. FIXME: ought to report this
|
||
to the caller somehow. */
|
||
inleft = 0;
|
||
break;
|
||
|
||
default:
|
||
perror_with_name (_("Internal error while "
|
||
"converting character sets"));
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* Create a new iterator. */
|
||
wchar_iterator::wchar_iterator (const gdb_byte *input, size_t bytes,
|
||
const char *charset, size_t width)
|
||
: m_input (input),
|
||
m_bytes (bytes),
|
||
m_width (width),
|
||
m_out (1)
|
||
{
|
||
m_desc = iconv_open (INTERMEDIATE_ENCODING, charset);
|
||
if (m_desc == (iconv_t) -1)
|
||
perror_with_name (_("Converting character sets"));
|
||
}
|
||
|
||
wchar_iterator::~wchar_iterator ()
|
||
{
|
||
if (m_desc != (iconv_t) -1)
|
||
iconv_close (m_desc);
|
||
}
|
||
|
||
int
|
||
wchar_iterator::iterate (enum wchar_iterate_result *out_result,
|
||
gdb_wchar_t **out_chars,
|
||
const gdb_byte **ptr,
|
||
size_t *len)
|
||
{
|
||
size_t out_request;
|
||
|
||
/* Try to convert some characters. At first we try to convert just
|
||
a single character. The reason for this is that iconv does not
|
||
necessarily update its outgoing arguments when it encounters an
|
||
invalid input sequence -- but we want to reliably report this to
|
||
our caller so it can emit an escape sequence. */
|
||
out_request = 1;
|
||
while (m_bytes > 0)
|
||
{
|
||
ICONV_CONST char *inptr = (ICONV_CONST char *) m_input;
|
||
char *outptr = (char *) m_out.data ();
|
||
const gdb_byte *orig_inptr = m_input;
|
||
size_t orig_in = m_bytes;
|
||
size_t out_avail = out_request * sizeof (gdb_wchar_t);
|
||
size_t num;
|
||
size_t r = iconv (m_desc, &inptr, &m_bytes, &outptr, &out_avail);
|
||
|
||
m_input = (gdb_byte *) inptr;
|
||
|
||
if (r == (size_t) -1)
|
||
{
|
||
switch (errno)
|
||
{
|
||
case EILSEQ:
|
||
/* Invalid input sequence. We still might have
|
||
converted a character; if so, return it. */
|
||
if (out_avail < out_request * sizeof (gdb_wchar_t))
|
||
break;
|
||
|
||
/* Otherwise skip the first invalid character, and let
|
||
the caller know about it. */
|
||
*out_result = wchar_iterate_invalid;
|
||
*ptr = m_input;
|
||
*len = m_width;
|
||
m_input += m_width;
|
||
m_bytes -= m_width;
|
||
return 0;
|
||
|
||
case E2BIG:
|
||
/* We ran out of space. We still might have converted a
|
||
character; if so, return it. Otherwise, grow the
|
||
buffer and try again. */
|
||
if (out_avail < out_request * sizeof (gdb_wchar_t))
|
||
break;
|
||
|
||
++out_request;
|
||
if (out_request > m_out.size ())
|
||
m_out.reserve (out_request);
|
||
continue;
|
||
|
||
case EINVAL:
|
||
/* Incomplete input sequence. Let the caller know, and
|
||
arrange for future calls to see EOF. */
|
||
*out_result = wchar_iterate_incomplete;
|
||
*ptr = m_input;
|
||
*len = m_bytes;
|
||
m_bytes = 0;
|
||
return 0;
|
||
|
||
default:
|
||
perror_with_name (_("Internal error while "
|
||
"converting character sets"));
|
||
}
|
||
}
|
||
|
||
/* We converted something. */
|
||
num = out_request - out_avail / sizeof (gdb_wchar_t);
|
||
*out_result = wchar_iterate_ok;
|
||
*out_chars = m_out.data ();
|
||
*ptr = orig_inptr;
|
||
*len = orig_in - m_bytes;
|
||
return num;
|
||
}
|
||
|
||
/* Really done. */
|
||
*out_result = wchar_iterate_eof;
|
||
return -1;
|
||
}
|
||
|
||
|
||
/* The charset.c module initialization function. */
|
||
|
||
extern initialize_file_ftype _initialize_charset; /* -Wmissing-prototype */
|
||
|
||
static VEC (char_ptr) *charsets;
|
||
|
||
#ifdef PHONY_ICONV
|
||
|
||
static void
|
||
find_charset_names (void)
|
||
{
|
||
/* Cast is fine here, because CHARSETS is never released. Note that
|
||
the vec does not hold "const char *" pointers instead of "char *"
|
||
because the non-phony version stores heap-allocated strings in
|
||
it. */
|
||
VEC_safe_push (char_ptr, charsets, (char *) GDB_DEFAULT_HOST_CHARSET);
|
||
VEC_safe_push (char_ptr, charsets, NULL);
|
||
}
|
||
|
||
#else /* PHONY_ICONV */
|
||
|
||
/* Sometimes, libiconv redefines iconvlist as libiconvlist -- but
|
||
provides different symbols in the static and dynamic libraries.
|
||
So, configure may see libiconvlist but not iconvlist. But, calling
|
||
iconvlist is the right thing to do and will work. Hence we do a
|
||
check here but unconditionally call iconvlist below. */
|
||
#if defined (HAVE_ICONVLIST) || defined (HAVE_LIBICONVLIST)
|
||
|
||
/* A helper function that adds some character sets to the vector of
|
||
all character sets. This is a callback function for iconvlist. */
|
||
|
||
static int
|
||
add_one (unsigned int count, const char *const *names, void *data)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < count; ++i)
|
||
VEC_safe_push (char_ptr, charsets, xstrdup (names[i]));
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
find_charset_names (void)
|
||
{
|
||
iconvlist (add_one, NULL);
|
||
VEC_safe_push (char_ptr, charsets, NULL);
|
||
}
|
||
|
||
#else
|
||
|
||
/* Return non-zero if LINE (output from iconv) should be ignored.
|
||
Older iconv programs (e.g. 2.2.2) include the human readable
|
||
introduction even when stdout is not a tty. Newer versions omit
|
||
the intro if stdout is not a tty. */
|
||
|
||
static int
|
||
ignore_line_p (const char *line)
|
||
{
|
||
/* This table is used to filter the output. If this text appears
|
||
anywhere in the line, it is ignored (strstr is used). */
|
||
static const char * const ignore_lines[] =
|
||
{
|
||
"The following",
|
||
"not necessarily",
|
||
"the FROM and TO",
|
||
"listed with several",
|
||
NULL
|
||
};
|
||
int i;
|
||
|
||
for (i = 0; ignore_lines[i] != NULL; ++i)
|
||
{
|
||
if (strstr (line, ignore_lines[i]) != NULL)
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
find_charset_names (void)
|
||
{
|
||
struct pex_obj *child;
|
||
const char *args[3];
|
||
int err, status;
|
||
int fail = 1;
|
||
int flags;
|
||
struct gdb_environ *iconv_env;
|
||
char *iconv_program;
|
||
|
||
/* Older iconvs, e.g. 2.2.2, don't omit the intro text if stdout is
|
||
not a tty. We need to recognize it and ignore it. This text is
|
||
subject to translation, so force LANGUAGE=C. */
|
||
iconv_env = make_environ ();
|
||
init_environ (iconv_env);
|
||
set_in_environ (iconv_env, "LANGUAGE", "C");
|
||
set_in_environ (iconv_env, "LC_ALL", "C");
|
||
|
||
child = pex_init (PEX_USE_PIPES, "iconv", NULL);
|
||
|
||
#ifdef ICONV_BIN
|
||
{
|
||
char *iconv_dir = relocate_gdb_directory (ICONV_BIN,
|
||
ICONV_BIN_RELOCATABLE);
|
||
iconv_program = concat (iconv_dir, SLASH_STRING, "iconv", NULL);
|
||
xfree (iconv_dir);
|
||
}
|
||
#else
|
||
iconv_program = xstrdup ("iconv");
|
||
#endif
|
||
args[0] = iconv_program;
|
||
args[1] = "-l";
|
||
args[2] = NULL;
|
||
flags = PEX_STDERR_TO_STDOUT;
|
||
#ifndef ICONV_BIN
|
||
flags |= PEX_SEARCH;
|
||
#endif
|
||
/* Note that we simply ignore errors here. */
|
||
if (!pex_run_in_environment (child, flags,
|
||
args[0], const_cast<char **> (args),
|
||
environ_vector (iconv_env),
|
||
NULL, NULL, &err))
|
||
{
|
||
FILE *in = pex_read_output (child, 0);
|
||
|
||
/* POSIX says that iconv -l uses an unspecified format. We
|
||
parse the glibc and libiconv formats; feel free to add others
|
||
as needed. */
|
||
|
||
while (in != NULL && !feof (in))
|
||
{
|
||
/* The size of buf is chosen arbitrarily. */
|
||
char buf[1024];
|
||
char *start, *r;
|
||
int len;
|
||
|
||
r = fgets (buf, sizeof (buf), in);
|
||
if (!r)
|
||
break;
|
||
len = strlen (r);
|
||
if (len <= 3)
|
||
continue;
|
||
if (ignore_line_p (r))
|
||
continue;
|
||
|
||
/* Strip off the newline. */
|
||
--len;
|
||
/* Strip off one or two '/'s. glibc will print lines like
|
||
"8859_7//", but also "10646-1:1993/UCS4/". */
|
||
if (buf[len - 1] == '/')
|
||
--len;
|
||
if (buf[len - 1] == '/')
|
||
--len;
|
||
buf[len] = '\0';
|
||
|
||
/* libiconv will print multiple entries per line, separated
|
||
by spaces. Older iconvs will print multiple entries per
|
||
line, indented by two spaces, and separated by ", "
|
||
(i.e. the human readable form). */
|
||
start = buf;
|
||
while (1)
|
||
{
|
||
int keep_going;
|
||
char *p;
|
||
|
||
/* Skip leading blanks. */
|
||
for (p = start; *p && *p == ' '; ++p)
|
||
;
|
||
start = p;
|
||
/* Find the next space, comma, or end-of-line. */
|
||
for ( ; *p && *p != ' ' && *p != ','; ++p)
|
||
;
|
||
/* Ignore an empty result. */
|
||
if (p == start)
|
||
break;
|
||
keep_going = *p;
|
||
*p = '\0';
|
||
VEC_safe_push (char_ptr, charsets, xstrdup (start));
|
||
if (!keep_going)
|
||
break;
|
||
/* Skip any extra spaces. */
|
||
for (start = p + 1; *start && *start == ' '; ++start)
|
||
;
|
||
}
|
||
}
|
||
|
||
if (pex_get_status (child, 1, &status)
|
||
&& WIFEXITED (status) && !WEXITSTATUS (status))
|
||
fail = 0;
|
||
|
||
}
|
||
|
||
xfree (iconv_program);
|
||
pex_free (child);
|
||
free_environ (iconv_env);
|
||
|
||
if (fail)
|
||
{
|
||
/* Some error occurred, so drop the vector. */
|
||
free_char_ptr_vec (charsets);
|
||
charsets = NULL;
|
||
}
|
||
else
|
||
VEC_safe_push (char_ptr, charsets, NULL);
|
||
}
|
||
|
||
#endif /* HAVE_ICONVLIST || HAVE_LIBICONVLIST */
|
||
#endif /* PHONY_ICONV */
|
||
|
||
/* The "auto" target charset used by default_auto_charset. */
|
||
static const char *auto_target_charset_name = GDB_DEFAULT_TARGET_CHARSET;
|
||
|
||
const char *
|
||
default_auto_charset (void)
|
||
{
|
||
return auto_target_charset_name;
|
||
}
|
||
|
||
const char *
|
||
default_auto_wide_charset (void)
|
||
{
|
||
return GDB_DEFAULT_TARGET_WIDE_CHARSET;
|
||
}
|
||
|
||
|
||
#ifdef USE_INTERMEDIATE_ENCODING_FUNCTION
|
||
/* Macro used for UTF or UCS endianness suffix. */
|
||
#if WORDS_BIGENDIAN
|
||
#define ENDIAN_SUFFIX "BE"
|
||
#else
|
||
#define ENDIAN_SUFFIX "LE"
|
||
#endif
|
||
|
||
/* The code below serves to generate a compile time error if
|
||
gdb_wchar_t type is not of size 2 nor 4, despite the fact that
|
||
macro __STDC_ISO_10646__ is defined.
|
||
This is better than a gdb_assert call, because GDB cannot handle
|
||
strings correctly if this size is different. */
|
||
|
||
extern char your_gdb_wchar_t_is_bogus[(sizeof (gdb_wchar_t) == 2
|
||
|| sizeof (gdb_wchar_t) == 4)
|
||
? 1 : -1];
|
||
|
||
/* intermediate_encoding returns the charset used internally by
|
||
GDB to convert between target and host encodings. As the test above
|
||
compiled, sizeof (gdb_wchar_t) is either 2 or 4 bytes.
|
||
UTF-16/32 is tested first, UCS-2/4 is tested as a second option,
|
||
otherwise an error is generated. */
|
||
|
||
const char *
|
||
intermediate_encoding (void)
|
||
{
|
||
iconv_t desc;
|
||
static const char *stored_result = NULL;
|
||
char *result;
|
||
|
||
if (stored_result)
|
||
return stored_result;
|
||
result = xstrprintf ("UTF-%d%s", (int) (sizeof (gdb_wchar_t) * 8),
|
||
ENDIAN_SUFFIX);
|
||
/* Check that the name is supported by iconv_open. */
|
||
desc = iconv_open (result, host_charset ());
|
||
if (desc != (iconv_t) -1)
|
||
{
|
||
iconv_close (desc);
|
||
stored_result = result;
|
||
return result;
|
||
}
|
||
/* Not valid, free the allocated memory. */
|
||
xfree (result);
|
||
/* Second try, with UCS-2 type. */
|
||
result = xstrprintf ("UCS-%d%s", (int) sizeof (gdb_wchar_t),
|
||
ENDIAN_SUFFIX);
|
||
/* Check that the name is supported by iconv_open. */
|
||
desc = iconv_open (result, host_charset ());
|
||
if (desc != (iconv_t) -1)
|
||
{
|
||
iconv_close (desc);
|
||
stored_result = result;
|
||
return result;
|
||
}
|
||
/* Not valid, free the allocated memory. */
|
||
xfree (result);
|
||
/* No valid charset found, generate error here. */
|
||
error (_("Unable to find a vaild charset for string conversions"));
|
||
}
|
||
|
||
#endif /* USE_INTERMEDIATE_ENCODING_FUNCTION */
|
||
|
||
void
|
||
_initialize_charset (void)
|
||
{
|
||
/* The first element is always "auto". */
|
||
VEC_safe_push (char_ptr, charsets, xstrdup ("auto"));
|
||
find_charset_names ();
|
||
|
||
if (VEC_length (char_ptr, charsets) > 1)
|
||
charset_enum = (const char **) VEC_address (char_ptr, charsets);
|
||
else
|
||
charset_enum = default_charset_names;
|
||
|
||
#ifndef PHONY_ICONV
|
||
#ifdef HAVE_LANGINFO_CODESET
|
||
/* The result of nl_langinfo may be overwritten later. This may
|
||
leak a little memory, if the user later changes the host charset,
|
||
but that doesn't matter much. */
|
||
auto_host_charset_name = xstrdup (nl_langinfo (CODESET));
|
||
/* Solaris will return `646' here -- but the Solaris iconv then does
|
||
not accept this. Darwin (and maybe FreeBSD) may return "" here,
|
||
which GNU libiconv doesn't like (infinite loop). */
|
||
if (!strcmp (auto_host_charset_name, "646") || !*auto_host_charset_name)
|
||
auto_host_charset_name = "ASCII";
|
||
auto_target_charset_name = auto_host_charset_name;
|
||
#elif defined (USE_WIN32API)
|
||
{
|
||
/* "CP" + x<=5 digits + paranoia. */
|
||
static char w32_host_default_charset[16];
|
||
|
||
snprintf (w32_host_default_charset, sizeof w32_host_default_charset,
|
||
"CP%d", GetACP());
|
||
auto_host_charset_name = w32_host_default_charset;
|
||
auto_target_charset_name = auto_host_charset_name;
|
||
}
|
||
#endif
|
||
#endif
|
||
|
||
add_setshow_enum_cmd ("charset", class_support,
|
||
charset_enum, &host_charset_name, _("\
|
||
Set the host and target character sets."), _("\
|
||
Show the host and target character sets."), _("\
|
||
The `host character set' is the one used by the system GDB is running on.\n\
|
||
The `target character set' is the one used by the program being debugged.\n\
|
||
You may only use supersets of ASCII for your host character set; GDB does\n\
|
||
not support any others.\n\
|
||
To see a list of the character sets GDB supports, type `set charset <TAB>'."),
|
||
/* Note that the sfunc below needs to set
|
||
target_charset_name, because the 'set
|
||
charset' command sets two variables. */
|
||
set_charset_sfunc,
|
||
show_charset,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_enum_cmd ("host-charset", class_support,
|
||
charset_enum, &host_charset_name, _("\
|
||
Set the host character set."), _("\
|
||
Show the host character set."), _("\
|
||
The `host character set' is the one used by the system GDB is running on.\n\
|
||
You may only use supersets of ASCII for your host character set; GDB does\n\
|
||
not support any others.\n\
|
||
To see a list of the character sets GDB supports, type `set host-charset <TAB>'."),
|
||
set_host_charset_sfunc,
|
||
show_host_charset_name,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_enum_cmd ("target-charset", class_support,
|
||
charset_enum, &target_charset_name, _("\
|
||
Set the target character set."), _("\
|
||
Show the target character set."), _("\
|
||
The `target character set' is the one used by the program being debugged.\n\
|
||
GDB translates characters and strings between the host and target\n\
|
||
character sets as needed.\n\
|
||
To see a list of the character sets GDB supports, type `set target-charset'<TAB>"),
|
||
set_target_charset_sfunc,
|
||
show_target_charset_name,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_enum_cmd ("target-wide-charset", class_support,
|
||
charset_enum, &target_wide_charset_name,
|
||
_("\
|
||
Set the target wide character set."), _("\
|
||
Show the target wide character set."), _("\
|
||
The `target wide character set' is the one used by the program being debugged.\
|
||
\nIn particular it is the encoding used by `wchar_t'.\n\
|
||
GDB translates characters and strings between the host and target\n\
|
||
character sets as needed.\n\
|
||
To see a list of the character sets GDB supports, type\n\
|
||
`set target-wide-charset'<TAB>"),
|
||
set_target_wide_charset_sfunc,
|
||
show_target_wide_charset_name,
|
||
&setlist, &showlist);
|
||
}
|