mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-05 08:14:19 +08:00
125 lines
4.3 KiB
C
125 lines
4.3 KiB
C
/* Wide characters for gdb
|
|
Copyright (C) 2009-2012 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef GDB_WCHAR_H
|
|
#define GDB_WCHAR_H
|
|
|
|
/* We handle three different modes here.
|
|
|
|
Capable systems have the full suite: wchar_t support and iconv
|
|
(perhaps via GNU libiconv). On these machines, full functionality
|
|
is available. Note that full functionality is dependent on us
|
|
being able to convert from an arbitrary encoding to wchar_t. In
|
|
practice this means we look for __STDC_ISO_10646__ (where we know
|
|
the name of the wchar_t encoding) or GNU libiconv, where we can use
|
|
"wchar_t".
|
|
|
|
DJGPP is known to have libiconv but not wchar_t support. On
|
|
systems like this, we use the narrow character functions. The full
|
|
functionality is available to the user, but many characters (those
|
|
outside the narrow range) will be displayed as escapes.
|
|
|
|
Finally, some systems do not have iconv, or are really broken
|
|
(e.g., Solaris, which almost has all of this working, but where
|
|
just enough is broken to make it too hard to use). Here we provide
|
|
a phony iconv which only handles a single character set, and we
|
|
provide wrappers for the wchar_t functionality we use. */
|
|
|
|
|
|
#if defined (HAVE_ICONV)
|
|
#include <iconv.h>
|
|
#else
|
|
/* This define is used elsewhere so we don't need to duplicate the
|
|
same checking logic in multiple places. */
|
|
#define PHONY_ICONV
|
|
#endif
|
|
|
|
/* We use "btowc" as a sentinel to detect functioning wchar_t support.
|
|
We check for either __STDC_ISO_10646__ or a new-enough libiconv in
|
|
order to ensure we can convert to and from wchar_t. We choose
|
|
libiconv version 0x108 because it is the first version with
|
|
iconvlist. */
|
|
#if defined (HAVE_ICONV) && defined (HAVE_WCHAR_H) && defined (HAVE_BTOWC) \
|
|
&& (defined (__STDC_ISO_10646__) \
|
|
|| (defined (_LIBICONV_VERSION) && _LIBICONV_VERSION >= 0x108))
|
|
|
|
#include <wchar.h>
|
|
#include <wctype.h>
|
|
|
|
typedef wchar_t gdb_wchar_t;
|
|
typedef wint_t gdb_wint_t;
|
|
|
|
#define gdb_wcslen wcslen
|
|
#define gdb_iswprint iswprint
|
|
#define gdb_iswdigit iswdigit
|
|
#define gdb_btowc btowc
|
|
#define gdb_WEOF WEOF
|
|
|
|
#define LCST(X) L ## X
|
|
|
|
/* If __STDC_ISO_10646__ is defined, then the host wchar_t is UCS-4.
|
|
We exploit this fact in the hope that there are hosts that define
|
|
this but which do not support "wchar_t" as an encoding argument to
|
|
iconv_open. We put the endianness into the encoding name to avoid
|
|
hosts that emit a BOM when the unadorned name is used. */
|
|
#if defined (__STDC_ISO_10646__)
|
|
#define USE_INTERMEDIATE_ENCODING_FUNCTION
|
|
#define INTERMEDIATE_ENCODING intermediate_encoding ()
|
|
const char *intermediate_encoding (void);
|
|
|
|
#elif defined (_LIBICONV_VERSION) && _LIBICONV_VERSION >= 0x108
|
|
#define INTERMEDIATE_ENCODING "wchar_t"
|
|
#else
|
|
/* This shouldn't happen, because the earlier #if should have filtered
|
|
out this case. */
|
|
#error "Neither __STDC_ISO_10646__ nor _LIBICONV_VERSION defined"
|
|
#endif
|
|
|
|
#else
|
|
|
|
/* If we got here and have wchar_t support, we might be on a system
|
|
with some problem. So, we just disable everything. */
|
|
#if defined (HAVE_WCHAR_H) && defined (HAVE_BTOWC)
|
|
#define PHONY_ICONV
|
|
#endif
|
|
|
|
typedef char gdb_wchar_t;
|
|
typedef int gdb_wint_t;
|
|
|
|
#define gdb_wcslen strlen
|
|
#define gdb_iswprint isprint
|
|
#define gdb_iswdigit isdigit
|
|
#define gdb_btowc /* empty */
|
|
#define gdb_WEOF EOF
|
|
|
|
#define LCST(X) X
|
|
|
|
/* If we are using the narrow character set, we want to use the host
|
|
narrow encoding as our intermediate encoding. However, if we are
|
|
also providing a phony iconv, we might as well just stick with
|
|
"wchar_t". */
|
|
#ifdef PHONY_ICONV
|
|
#define INTERMEDIATE_ENCODING "wchar_t"
|
|
#else
|
|
#define INTERMEDIATE_ENCODING host_charset ()
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#endif /* GDB_WCHAR_H */
|