[iso] initial ISO image support (EXPERIMENTAL)

* from libcdio: http://www.gnu.org/software/libcdio/

src/libcdio/cdio/utf8.h

@@ -0,0 +1,92 @@
+/*
+    $Id: utf8.h,v 1.2 2008/03/25 15:59:09 karl Exp $
+    
+    Copyright (C) 2008 Rocky Bernstein <rocky@gnu.org>
+    Copyright (C) 2006 Burkhard Plaum <plaum@ipf.uni-stuttgart.de>
+
+    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 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, see <http://www.gnu.org/licenses/>.
+*/
+/* UTF-8 support */
+
+
+#include <cdio/types.h>
+
+/** \brief Opaque characterset converter
+ */
+
+typedef struct cdio_charset_coverter_s cdio_charset_coverter_t;
+
+/** \brief Create a charset converter
+ *  \param src_charset Source charset
+ *  \param dst_charset Destination charset
+ *  \returns A newly allocated charset converter
+ */
+
+cdio_charset_coverter_t *
+cdio_charset_converter_create(const char * src_charset,
+                              const char * dst_charset);
+
+/** \brief Destroy a characterset converter
+ *  \param cnv A characterset converter
+ */
+
+void cdio_charset_converter_destroy(cdio_charset_coverter_t*cnv);
+
+/** \brief Convert a string from one character set to another
+ *  \param cnv A charset converter
+ *  \param src Source string
+ *  \param src_len Length of source string
+ *  \param dst Returns destination string
+ *  \param dst_len If non NULL, returns the length of the destination string
+ *  \returns true if conversion was sucessful, false else.
+ *
+ *  The destination string must be freed by the caller with free().
+ *  If you pass -1 for src_len, strlen() will be used.
+ */
+
+bool cdio_charset_convert(cdio_charset_coverter_t*cnv,
+                          char * src, int src_len,
+                          char ** dst, int * dst_len);
+
+/** \brief Convert a string from UTF-8 to another charset
+ *  \param src Source string (0 terminated)
+ *  \param dst Returns destination string
+ *  \param dst_len If non NULL, returns the length of the destination string
+ *  \param dst_charset The characterset to convert to
+ *  \returns true if conversion was sucessful, false else.
+ *
+ *  This is a convenience function, which creates a charset converter,
+ *  converts one string and destroys the charset converter.
+ */
+
+
+bool cdio_charset_from_utf8(cdio_utf8_t * src, char ** dst,
+                            int * dst_len, const char * dst_charset);
+
+/** \brief Convert a string from another charset to UTF-8 
+ *  \param src Source string
+ *  \param src_len Length of the source string
+ *  \param dst Returns destination string (0 terminated)
+ *  \param src_charset The characterset to convert from
+ *  \returns true if conversion was sucessful, false else.
+ *
+ *  This is a convenience function, which creates a charset converter,
+ *  converts one string and destroys the charset converter. If you pass -1
+ *  for src_len, strlen() will be used.
+ */
+
+
+bool cdio_charset_to_utf8(char *src, size_t src_len, cdio_utf8_t **dst,
+                          const char * src_charset);
+