New file from Bruno.

One portability tweak:
guard inclusion of stddef.h.

1 files changed, 121 insertions, 0 deletions

diff --git a/lib/unicodeio.c b/lib/unicodeio.c
new file mode 100644
index 0000000000..8e0b2d8f1f
--- /dev/null
+++ b/lib/unicodeio.c
@@ -0,0 +1,121 @@
+/* Unicode character output to streams with locale dependent encoding.
+
+   Copyright (C) 2000 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>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#if HAVE_STDDEF_H
+# include <stddef.h>
+#endif
+
+#include <stdio.h>
+
+#if HAVE_ICONV
+# include <iconv.h>
+/* Name of UCS-4 encoding with machine dependent endianness and alignment.  */
+# ifdef _LIBICONV_VERSION
+#  define UCS4_NAME "UCS-4-INTERNAL"
+# else
+#  define UCS4_NAME "INTERNAL"
+# endif
+#endif
+
+#include <error.h>
+
+#if ENABLE_NLS
+# include <libintl.h>
+# define _(Text) gettext (Text)
+#else
+# define _(Text) Text
+#endif
+
+#include "unicodeio.h"
+
+/* Use md5.h for its nice detection of unsigned 32-bit type.  */
+#include "md5.h"
+#undef uint32_t
+#define uint32_t md5_uint32
+
+/* Outputs the Unicode character CODE to the output stream STREAM.
+   Assumes that the locale doesn't change between two calls.  */
+void
+print_unicode_char (FILE *stream, unsigned int code)
+{
+#if HAVE_ICONV
+  static int initialized;
+  static iconv_t ucs4_to_local;
+
+  uint32_t in;
+  char outbuf[25];
+  const char *inptr;
+  size_t inbytesleft;
+  char *outptr;
+  size_t outbytesleft;
+  size_t res;
+
+  if (!initialized)
+    {
+      extern const char *locale_charset (void);
+      const char *charset = locale_charset ();
+
+      ucs4_to_local = (charset != NULL
+		       ? iconv_open (charset, UCS4_NAME)
+		       : (iconv_t)(-1));
+      if (ucs4_to_local == (iconv_t)(-1))
+	{
+	  /* For an unknown encoding, assume ASCII.  */
+	  ucs4_to_local = iconv_open ("ASCII", UCS4_NAME);
+	  if (ucs4_to_local == (iconv_t)(-1))
+	    error (1, 0, _("cannot output U+%04X: iconv function not usable"),
+		   code);
+	}
+      initialized = 1;
+    }
+
+  in = code;
+  inptr = (char *) &in;
+  inbytesleft = sizeof (in);
+  outptr = outbuf;
+  outbytesleft = sizeof (outbuf);
+
+  /* Convert the character.  */
+  res = iconv (ucs4_to_local, &inptr, &inbytesleft, &outptr, &outbytesleft);
+  if (inbytesleft > 0 || res == (size_t)(-1))
+    error (1, res == (size_t)(-1) ? errno : 0,
+	   _("cannot convert U+%04X to local character set"), code);
+
+  /* Avoid glibc-2.1 bug.  */
+# if defined _LIBICONV_VERSION || !(__GLIBC__ - 0 == 2 && __GLIBC_MINOR__ - 0 <= 1)
+
+  /* Get back to the initial shift state.  */
+  res = iconv (ucs4_to_local, NULL, NULL, &outptr, &outbytesleft);
+  if (res == (size_t)(-1))
+    error (1, errno, _("cannot convert U+%04X to local character set"), code);
+
+# endif
+
+  fwrite (outbuf, 1, outptr - outbuf, stream);
+
+#else
+  error (1, 0, _("cannot output U+%04X: iconv function not available"), code);
+#endif
+}