- upgrade libidn

Example/Pods/libidn/lib/toutf8.c

@@ -0,0 +1,162 @@
+/* toutf8.c --- Convert strings from system locale into UTF-8.
+   Copyright (C) 2002-2015 Simon Josefsson
+
+   This file is part of GNU Libidn.
+
+   GNU Libidn is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Libidn 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>. */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+/* Get prototypes. */
+#include "stringprep.h"
+
+/* Get fprintf. */
+#include <stdio.h>
+
+/* Get getenv. */
+#include <stdlib.h>
+
+/* Get strlen. */
+#include <string.h>
+
+/* Get iconv_string. */
+#include "striconv.h"
+
+#ifdef _LIBC
+# define HAVE_ICONV 1
+# define HAVE_LOCALE_H 1
+# define HAVE_LANGINFO_CODESET 1
+#endif
+
+#include <locale.h>
+
+#ifdef HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+
+#ifdef _LIBC
+# define stringprep_locale_charset() nl_langinfo (CODESET)
+#else
+/**
+ * stringprep_locale_charset:
+ *
+ * Find out current locale charset.  The function respect the CHARSET
+ * environment variable, but typically uses nl_langinfo(CODESET) when
+ * it is supported.  It fall back on "ASCII" if CHARSET isn't set and
+ * nl_langinfo isn't supported or return anything.
+ *
+ * Note that this function return the application's locale's preferred
+ * charset (or thread's locale's preffered charset, if your system
+ * support thread-specific locales).  It does not return what the
+ * system may be using.  Thus, if you receive data from external
+ * sources you cannot in general use this function to guess what
+ * charset it is encoded in.  Use stringprep_convert from the external
+ * representation into the charset returned by this function, to have
+ * data in the locale encoding.
+ *
+ * Return value: Return the character set used by the current locale.
+ *   It will never return NULL, but use "ASCII" as a fallback.
+ **/
+const char *
+stringprep_locale_charset (void)
+{
+  const char *charset = getenv ("CHARSET");	/* flawfinder: ignore */
+
+  if (charset && *charset)
+    return charset;
+
+# ifdef HAVE_LANGINFO_CODESET
+  charset = nl_langinfo (CODESET);
+
+  if (charset && *charset)
+    return charset;
+# endif
+
+  return "ASCII";
+}
+#endif
+
+/**
+ * stringprep_convert:
+ * @str: input zero-terminated string.
+ * @to_codeset: name of destination character set.
+ * @from_codeset: name of origin character set, as used by @str.
+ *
+ * Convert the string from one character set to another using the
+ * system's iconv() function.
+ *
+ * Return value: Returns newly allocated zero-terminated string which
+ *   is @str transcoded into to_codeset.
+ **/
+char *
+stringprep_convert (const char *str,
+		    const char *to_codeset, const char *from_codeset)
+{
+#if HAVE_ICONV
+  return str_iconv (str, from_codeset, to_codeset);
+#else
+  char *p;
+  fprintf (stderr, "libidn: warning: libiconv not installed, cannot "
+	   "convert data to UTF-8\n");
+  p = malloc (strlen (str) + 1);
+  if (!p)
+    return NULL;
+  return strcpy (p, str);
+#endif
+}
+
+/**
+ * stringprep_locale_to_utf8:
+ * @str: input zero terminated string.
+ *
+ * Convert string encoded in the locale's character set into UTF-8 by
+ * using stringprep_convert().
+ *
+ * Return value: Returns newly allocated zero-terminated string which
+ *   is @str transcoded into UTF-8.
+ **/
+char *
+stringprep_locale_to_utf8 (const char *str)
+{
+  return stringprep_convert (str, "UTF-8", stringprep_locale_charset ());
+}
+
+/**
+ * stringprep_utf8_to_locale:
+ * @str: input zero terminated string.
+ *
+ * Convert string encoded in UTF-8 into the locale's character set by
+ * using stringprep_convert().
+ *
+ * Return value: Returns newly allocated zero-terminated string which
+ *   is @str transcoded into the locale's character set.
+ **/
+char *
+stringprep_utf8_to_locale (const char *str)
+{
+  return stringprep_convert (str, stringprep_locale_charset (), "UTF-8");
+}