+++ /dev/null
-/* Unicode character output to streams with locale dependent encoding.
-
- Copyright (C) 2000-2002 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU Library General Public License as published
- by the Free Software Foundation; either version 2, 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- USA. */
-
-/* Written by Bruno Haible <haible@clisp.cons.org>. */
-
-/* Note: This file requires the locale_charset() function. See in
- libiconv-1.7/libcharset/INTEGRATE for how to obtain it. */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#if HAVE_STDDEF_H
-# include <stddef.h>
-#endif
-
-#include <stdio.h>
-#if HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-#endif
-
-#include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
-
-#if HAVE_ICONV
-# include <iconv.h>
-#endif
-
-#include <error.h>
-
-#if ENABLE_NLS
-# include <libintl.h>
-#else
-# define gettext(Text) Text
-#endif
-#define _(Text) gettext (Text)
-#define N_(Text) Text
-
-/* Specification. */
-#include "unicodeio.h"
-
-/* When we pass a Unicode character to iconv(), we must pass it in a
- suitable encoding. The standardized Unicode encodings are
- UTF-8, UCS-2, UCS-4, UTF-16, UTF-16BE, UTF-16LE, UTF-7.
- UCS-2 supports only characters up to \U0000FFFF.
- UTF-16 and variants support only characters up to \U0010FFFF.
- UTF-7 is way too complex and not supported by glibc-2.1.
- UCS-4 specification leaves doubts about endianness and byte order
- mark. glibc currently interprets it as big endian without byte order
- mark, but this is not backed by an RFC.
- 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"
-
-/* Converts the Unicode character CODE to its multibyte representation
- in the current locale and calls the SUCCESS callback on the resulting
- byte sequence. If an error occurs, invokes the FAILURE callback instead,
- passing it CODE and an English error string.
- Returns whatever the callback returned.
- Assumes that the locale doesn't change between two calls. */
-long
-unicode_to_mb (unsigned int code,
- long (*success) PARAMS ((const char *buf, size_t buflen,
- void *callback_arg)),
- long (*failure) PARAMS ((unsigned int code, const char *msg,
- void *callback_arg)),
- void *callback_arg)
-{
- static int initialized;
- static int is_utf8;
-#if HAVE_ICONV
- static iconv_t utf8_to_local;
-#endif
-
- char inbuf[6];
- int count;
-
- if (!initialized)
- {
- extern const char *locale_charset PARAMS ((void));
- const char *charset = locale_charset ();
-
- 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);
- }
-#endif
- initialized = 1;
- }
-
- /* Test whether the utf8_to_local converter is available at all. */
- if (!is_utf8)
- {
-#if HAVE_ICONV
- if (utf8_to_local == (iconv_t)(-1))
- 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);
- if (count < 0)
- return failure (code, N_("character out of range"), callback_arg);
-
-#if HAVE_ICONV
- if (!is_utf8)
- {
- char outbuf[25];
- const char *inptr;
- size_t inbytesleft;
- char *outptr;
- size_t outbytesleft;
- size_t res;
-
- inptr = inbuf;
- inbytesleft = count;
- outptr = outbuf;
- outbytesleft = sizeof (outbuf);
-
- /* Convert the character from UTF-8 to the locale's charset. */
- res = iconv (utf8_to_local,
- (ICONV_CONST char **)&inptr, &inbytesleft,
- &outptr, &outbytesleft);
- if (inbytesleft > 0 || res == (size_t)(-1)
- /* 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')
-# endif
- )
- return failure (code, NULL, callback_arg);
-
- /* Avoid glibc-2.1 bug and Solaris 2.7 bug. */
-# if defined _LIBICONV_VERSION \
- || !((__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1) || 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);
-# endif
-
- return success (outbuf, outptr - outbuf, callback_arg);
- }
-#endif
-
- /* At this point, is_utf8 is true, so no conversion is needed. */
- return success (inbuf, count, callback_arg);
-}
-
-/* Simple success callback that outputs the converted string.
- The STREAM is passed as callback_arg. */
-long
-fwrite_success_callback (const char *buf, size_t buflen, void *callback_arg)
-{
- FILE *stream = (FILE *) callback_arg;
-
- fwrite (buf, 1, buflen, stream);
- return 0;
-}
-
-/* Simple failure callback that displays an error and exits. */
-static long
-exit_failure_callback (unsigned int code, const char *msg, void *callback_arg)
-{
- 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));
- 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, void *callback_arg)
-{
- FILE *stream = (FILE *) callback_arg;
-
- if (code < 0x10000)
- fprintf (stream, "\\u%04X", code);
- else
- fprintf (stream, "\\U%08X", code);
- return -1;
-}
-
-/* Outputs the Unicode character CODE to the output stream STREAM.
- Upon failure, exit if exit_on_error is true, otherwise output a fallback
- notation. */
-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);
-}
projects / chaz / tar / blobdiff