/* Unicode character output to streams with locale dependent encoding.
- Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+ 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
/* 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 ENABLE_NLS
# include <libintl.h>
-# define _(Text) gettext (Text)
#else
-# define _(Text) Text
+# 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
#define UTF8_NAME "UTF-8"
/* Converts the Unicode character CODE to its multibyte representation
- in the current locale and calls the CALLBACK on the resulting byte
- sequence.
+ 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. */
-void
+long
unicode_to_mb (unsigned int code,
- void (*callback) PARAMS((const char *buf, size_t buflen,
+ 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)
{
{
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);
- if (utf8_to_local == (iconv_t)(-1))
- error (1, 0,
- _("cannot convert U+%04X to local character set: iconv function not usable"),
- code);
- }
+ /* 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)
- error (1, 0, _("U+%04X: character out of range"), code);
+ return failure (code, N_("character out of range"), callback_arg);
- if (is_utf8)
- {
- callback (inbuf, count, callback_arg);
- }
- else
- {
#if HAVE_ICONV
+ if (!is_utf8)
+ {
char outbuf[25];
const char *inptr;
size_t inbytesleft;
|| (res > 0 && code != 0 && outptr - outbuf == 1 && *outbuf == '\0')
# endif
)
- error (1, res == (size_t)(-1) ? errno : 0,
- _("cannot convert U+%04X to local character set"), code);
+ return failure (code, NULL, callback_arg);
/* Avoid glibc-2.1 bug and Solaris 2.7 bug. */
# if defined _LIBICONV_VERSION \
/* Get back to the initial shift state. */
res = iconv (utf8_to_local, NULL, NULL, &outptr, &outbytesleft);
if (res == (size_t)(-1))
- error (1, errno, _("cannot convert U+%04X to local character set"),
- code);
+ return failure (code, NULL, callback_arg);
# endif
- callback (outbuf, outptr - outbuf, callback_arg);
-#else
- error (1, 0,
- _("cannot convert U+%04X to local character set: iconv function not available"),
- code);
-#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 callback that outputs the converted string.
+/* Simple success callback that outputs the converted string.
The STREAM is passed as callback_arg. */
-static void
-fprintf_callback (const char *buf, size_t buflen, void *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.
- Assumes that the locale doesn't change between two calls. */
+ Upon failure, exit if exit_on_error is true, otherwise output a fallback
+ notation. */
void
-print_unicode_char (FILE *stream, unsigned int code)
+print_unicode_char (FILE *stream, unsigned int code, int exit_on_error)
{
- unicode_to_mb (code, fprintf_callback, stream);
+ unicode_to_mb (code, fwrite_success_callback,
+ exit_on_error
+ ? exit_failure_callback
+ : fallback_failure_callback,
+ stream);
}
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