X-Git-Url: http://git.marmaro.de/?p=mmh;a=blobdiff_plain;f=sbr%2Fcharset.c;fp=sbr%2Fcharset.c;h=56f085cc3eb31de0b64772f4043c42c845e9edad;hp=0000000000000000000000000000000000000000;hb=8d77b48284c58c135a6b2787e721597346ab056d;hpb=4c1efddfd499300c7e74263e57d8aa137e84c853

diff --git a/sbr/charset.c b/sbr/charset.c
new file mode 100644
index 0000000..56f085c
--- /dev/null
+++ b/sbr/charset.c
@@ -0,0 +1,70 @@
+/*
+** charset.c -- routines for character sets
+**
+** This code is Copyright (c) 2002, by the authors of nmh.  See the
+** COPYRIGHT file in the root directory of the nmh distribution for
+** complete copyright information.
+*/
+
+#include <h/mh.h>
+#ifdef HAVE_LANGINFO_H
+# include <langinfo.h>
+#endif
+
+
+/*
+** Get the current character set
+*/
+char *
+get_charset()
+{
+	char *charset = getenv("MM_CHARSET");
+#if defined(HAVE_NL_LANGINFO) && defined(CODESET)
+	if (!charset) {
+		charset = norm_charmap(nl_langinfo(CODESET));
+	}
+#endif
+	return charset;
+}
+
+
+/*
+** Check if we can display a given character set natively.
+*/
+int
+is_native_charset(char *str)
+{
+	char *mm_charset = NULL;
+
+	if (!(mm_charset = get_charset())) {
+		mm_charset = "US-ASCII";
+	}
+	if (mh_strcasecmp(str, mm_charset)==0) {
+		return 1;
+	}
+
+	/* US-ASCII is a subset of the ISO-8859-X and UTF-8 character sets */
+	if (strncasecmp("ISO-8859-", mm_charset, 9)==0 ||
+			mh_strcasecmp("UTF-8", mm_charset)==0) {
+		if (mh_strcasecmp(str, "US-ASCII")==0) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+
+/*
+** Return the name of the character set we are
+** using for 8bit text.
+*/
+char *
+write_charset_8bit(void)
+{
+	char *mm_charset = NULL;
+
+	if (!(mm_charset = get_charset())) {
+		mm_charset = "x-unknown";
+	}
+	return mm_charset;
+}