initial import

src/plugin_common/charset.c

@@ -0,0 +1,146 @@
+/* plugin_common - Routines common to several plugins
+ * Copyright (C) 2002  Josh Coalson
+ *
+ * Only slightly modified charset.c from:
+ *  EasyTAG - Tag editor for MP3 and OGG files
+ *  Copyright (C) 1999-2001  H<>vard Kv<4B>len <havardk@xmms.org>
+ *
+ * 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+#ifdef HAVE_ICONV
+#include <iconv.h>
+#endif
+
+#ifdef HAVE_LANGINFO_CODESET
+#include <langinfo.h>
+#endif
+
+#include "charset.h"
+
+
+/*************
+ * Functions *
+ *************/
+
+char* FLAC_plugin__charset_get_current (void)
+{
+	char *charset = getenv("CHARSET");
+
+#ifdef HAVE_LANGINFO_CODESET
+	if (!charset)
+		charset = nl_langinfo(CODESET);
+#endif
+	if (!charset)
+		charset = "ISO-8859-1";
+
+	return charset;
+}
+
+
+#ifdef HAVE_ICONV
+char* FLAC_plugin__charset_convert_string (const char *string, char *from, char *to)
+{
+	size_t outleft, outsize, length;
+	iconv_t cd;
+	char *out, *outptr;
+	const char *input = string;
+
+	if (!string)
+		return NULL;
+
+	length = strlen(string);
+
+	if ((cd = iconv_open(to, from)) == (iconv_t)-1)
+	{
+#ifdef DEBUG
+		fprintf(stderr, "convert_string(): Conversion not supported. Charsets: %s -> %s", from, to);
+#endif
+		return strdup(string);
+	}
+
+	/* Due to a GLIBC bug, round outbuf_size up to a multiple of 4 */
+	/* + 1 for nul in case len == 1 */
+	outsize = ((length + 3) & ~3) + 1;
+	out = malloc(outsize);
+	outleft = outsize - 1;
+	outptr = out;
+
+retry:
+	if (iconv(cd, &input, &length, &outptr, &outleft) == -1)
+	{
+		int used;
+		switch (errno)
+		{
+			case E2BIG:
+				used = outptr - out;
+				outsize = (outsize - 1) * 2 + 1;
+				out = realloc(out, outsize);
+				outptr = out + used;
+				outleft = outsize - 1 - used;
+				goto retry;
+			case EINVAL:
+				break;
+			case EILSEQ:
+				/* Invalid sequence, try to get the rest of the string */
+				input++;
+				length = strlen(input);
+				goto retry;
+			default:
+#ifdef DEBUG
+				fprintf(stderr, "convert_string(): Conversion failed. Inputstring: %s; Error: %s", string, strerror(errno));
+#endif
+				break;
+		}
+	}
+	*outptr = '\0';
+
+	iconv_close(cd);
+	return out;
+}
+#else
+char* FLAC_plugin__charset_convert_string (const char *string, char *from, char *to)
+{
+	(void)from, (void)to;
+	if (!string)
+		return NULL;
+	return strdup(string);
+}
+#endif
+
+#ifdef HAVE_ICONV
+int FLAC_plugin__charset_test_conversion (char *from, char *to)
+{
+	iconv_t cd;
+
+	if ((cd=iconv_open(to,from)) == (iconv_t)-1)
+	{
+		/* Conversion not supported */
+		return 0;
+	}
+	iconv_close(cd);
+	return ;
+}
+#else
+int FLAC_plugin__charset_test_conversion (char *from, char *to)
+{
+	(void)from, (void)to;
+	return 1;
+}
+#endif