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-rw-r--r--lib/unicodeio.c126
1 files changed, 42 insertions, 84 deletions
diff --git a/lib/unicodeio.c b/lib/unicodeio.c
index ceeff89..b2494ec 100644
--- a/lib/unicodeio.c
+++ b/lib/unicodeio.c
@@ -1,26 +1,22 @@
/* Unicode character output to streams with locale dependent encoding.
- Copyright (C) 2000-2003, 2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 2000-2003, 2006, 2008-2016 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <haible@clisp.cons.org>. */
-/* Note: This file requires the locale_charset() function. See in
- libiconv-1.8/libcharset/INTEGRATE for how to obtain it. */
-
#include <config.h>
/* Specification. */
@@ -40,17 +36,8 @@
#define _(msgid) gettext (msgid)
#define N_(msgid) msgid
-#ifndef __attribute__
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
-# define __attribute__(x) /* empty */
-# endif
-#endif
-
-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
#include "localcharset.h"
+#include "unistr.h"
/* When we pass a Unicode character to iconv(), we must pass it in a
suitable encoding. The standardized Unicode encodings are
@@ -64,42 +51,6 @@
So we use UTF-8. It supports characters up to \U7FFFFFFF and is
unambiguously defined. */
-/* Stores the UTF-8 representation of the Unicode character wc in r[0..5].
- Returns the number of bytes stored, or -1 if wc is out of range. */
-static int
-utf8_wctomb (unsigned char *r, unsigned int wc)
-{
- int count;
-
- if (wc < 0x80)
- count = 1;
- else if (wc < 0x800)
- count = 2;
- else if (wc < 0x10000)
- count = 3;
- else if (wc < 0x200000)
- count = 4;
- else if (wc < 0x4000000)
- count = 5;
- else if (wc <= 0x7fffffff)
- count = 6;
- else
- return -1;
-
- switch (count)
- {
- /* Note: code falls through cases! */
- case 6: r[5] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x4000000;
- case 5: r[4] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x200000;
- case 4: r[3] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x10000;
- case 3: r[2] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0x800;
- case 2: r[1] = 0x80 | (wc & 0x3f); wc = wc >> 6; wc |= 0xc0;
- case 1: r[0] = wc;
- }
-
- return count;
-}
-
/* Luckily, the encoding's name is platform independent. */
#define UTF8_NAME "UTF-8"
@@ -111,11 +62,11 @@ utf8_wctomb (unsigned char *r, unsigned int wc)
Assumes that the locale doesn't change between two calls. */
long
unicode_to_mb (unsigned int code,
- long (*success) (const char *buf, size_t buflen,
- void *callback_arg),
- long (*failure) (unsigned int code, const char *msg,
- void *callback_arg),
- void *callback_arg)
+ long (*success) (const char *buf, size_t buflen,
+ void *callback_arg),
+ long (*failure) (unsigned int code, const char *msg,
+ void *callback_arg),
+ void *callback_arg)
{
static int initialized;
static int is_utf8;
@@ -133,12 +84,12 @@ unicode_to_mb (unsigned int code,
is_utf8 = !strcmp (charset, UTF8_NAME);
#if HAVE_ICONV
if (!is_utf8)
- {
- utf8_to_local = iconv_open (charset, UTF8_NAME);
- if (utf8_to_local == (iconv_t)(-1))
- /* For an unknown encoding, assume ASCII. */
- utf8_to_local = iconv_open ("ASCII", UTF8_NAME);
- }
+ {
+ utf8_to_local = iconv_open (charset, UTF8_NAME);
+ if (utf8_to_local == (iconv_t)(-1))
+ /* For an unknown encoding, assume ASCII. */
+ utf8_to_local = iconv_open ("ASCII", UTF8_NAME);
+ }
#endif
initialized = 1;
}
@@ -148,14 +99,14 @@ unicode_to_mb (unsigned int code,
{
#if HAVE_ICONV
if (utf8_to_local == (iconv_t)(-1))
- return failure (code, N_("iconv function not usable"), callback_arg);
+ return failure (code, N_("iconv function not usable"), callback_arg);
#else
return failure (code, N_("iconv function not available"), callback_arg);
#endif
}
/* Convert the character to UTF-8. */
- count = utf8_wctomb ((unsigned char *) inbuf, code);
+ count = u8_uctomb ((unsigned char *) inbuf, code, sizeof (inbuf));
if (count < 0)
return failure (code, N_("character out of range"), callback_arg);
@@ -176,24 +127,26 @@ unicode_to_mb (unsigned int code,
/* Convert the character from UTF-8 to the locale's charset. */
res = iconv (utf8_to_local,
- (ICONV_CONST char **)&inptr, &inbytesleft,
- &outptr, &outbytesleft);
+ (ICONV_CONST char **)&inptr, &inbytesleft,
+ &outptr, &outbytesleft);
if (inbytesleft > 0 || res == (size_t)(-1)
- /* Irix iconv() inserts a NUL byte if it cannot convert. */
+ /* Irix iconv() inserts a NUL byte if it cannot convert. */
# if !defined _LIBICONV_VERSION && (defined sgi || defined __sgi)
- || (res > 0 && code != 0 && outptr - outbuf == 1 && *outbuf == '\0')
+ || (res > 0 && code != 0 && outptr - outbuf == 1 && *outbuf == '\0')
# endif
)
- return failure (code, NULL, callback_arg);
+ return failure (code, NULL, callback_arg);
/* Avoid glibc-2.1 bug and Solaris 7 bug. */
# if defined _LIBICONV_VERSION \
- || !((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) || defined __sun)
+ || !(((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) \
+ && !defined __UCLIBC__) \
+ || defined __sun)
/* Get back to the initial shift state. */
res = iconv (utf8_to_local, NULL, NULL, &outptr, &outbytesleft);
if (res == (size_t)(-1))
- return failure (code, NULL, callback_arg);
+ return failure (code, NULL, callback_arg);
# endif
return success (outbuf, outptr - outbuf, callback_arg);
@@ -211,6 +164,10 @@ fwrite_success_callback (const char *buf, size_t buflen, void *callback_arg)
{
FILE *stream = (FILE *) callback_arg;
+ /* The return value of fwrite can be ignored here, because under normal
+ conditions (STREAM is an open stream and not wide-character oriented)
+ when fwrite() returns a value != buflen it also sets STREAM's error
+ indicator. */
fwrite (buf, 1, buflen, stream);
return 0;
}
@@ -218,21 +175,22 @@ fwrite_success_callback (const char *buf, size_t buflen, void *callback_arg)
/* Simple failure callback that displays an error and exits. */
static long
exit_failure_callback (unsigned int code, const char *msg,
- void *callback_arg ATTRIBUTE_UNUSED)
+ void *callback_arg _GL_UNUSED)
{
if (msg == NULL)
error (1, 0, _("cannot convert U+%04X to local character set"), code);
else
error (1, 0, _("cannot convert U+%04X to local character set: %s"), code,
- gettext (msg));
+ gettext (msg));
return -1;
}
/* Simple failure callback that displays a fallback representation in plain
ASCII, using the same notation as ISO C99 strings. */
static long
-fallback_failure_callback (unsigned int code, const char *msg ATTRIBUTE_UNUSED
- , void *callback_arg)
+fallback_failure_callback (unsigned int code,
+ const char *msg _GL_UNUSED,
+ void *callback_arg)
{
FILE *stream = (FILE *) callback_arg;
@@ -250,8 +208,8 @@ void
print_unicode_char (FILE *stream, unsigned int code, int exit_on_error)
{
unicode_to_mb (code, fwrite_success_callback,
- exit_on_error
- ? exit_failure_callback
- : fallback_failure_callback,
- stream);
+ exit_on_error
+ ? exit_failure_callback
+ : fallback_failure_callback,
+ stream);
}
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