patch-2.4.5 linux/fs/nls/nls_koi8-ru.c

• Lines: 100
• Date: Sat May 19 17:47:55 2001
• Orig file: v2.4.4/linux/fs/nls/nls_koi8-ru.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.4/linux/fs/nls/nls_koi8-ru.c linux/fs/nls/nls_koi8-ru.c
@@ -0,0 +1,99 @@
+/*
+ * linux/fs/nls_koi8-ru.c
+ *
+ * Charset koi8-ru translation based on charset koi8-u.
+ * The Unicode to charset table has only exact mappings.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/errno.h>
+
+static struct nls_table *p_nls;
+
+static int uni2char(const wchar_t uni,
+		    unsigned char *out, int boundlen)
+{
+	if (boundlen <= 0)
+		return -ENAMETOOLONG;
+
+	if ((uni & 0xffaf) == 0x040e || (uni & 0xffce) == 0x254c) {
+		/* koi8-ru and koi8-u differ only on two characters */
+		if (uni == 0x040e)
+			return 0xbe;
+		else if (uni == 0x045e)
+			return 0xae;
+		else if (uni == 0x255d || uni == 0x256c)
+			return 0;
+		else
+			return p_nls->uni2char(uni, out, boundlen);
+	}
+	else
+		/* fast path */
+		return p_nls->uni2char(uni, out, boundlen);
+}
+
+static int char2uni(const unsigned char *rawstring, int boundlen,
+		    wchar_t *uni)
+{
+	int n;
+
+	if ((*rawstring & 0xef) != 0xae) {
+		/* koi8-ru and koi8-u differ only on two characters */
+		*uni = (*rawstring & 0x10) ? 0x040e : 0x045e;
+		return 1;
+	}
+
+	n = p_nls->char2uni(rawstring, boundlen, uni);
+	return n;
+}
+
+static struct nls_table table = {
+	"koi8-ru",
+	uni2char,
+	char2uni,
+	NULL,
+	NULL,
+	THIS_MODULE,
+};
+
+static int __init init_nls_koi8_ru(void)
+{
+	p_nls = load_nls("koi8-u");
+
+	if (p_nls) {
+		table.charset2upper = p_nls->charset2upper;
+		table.charset2lower = p_nls->charset2lower;
+		return register_nls(&table);
+	}
+
+	return -EINVAL;
+}
+
+static void __exit exit_nls_koi8_ru(void)
+{
+	unregister_nls(&table);
+	unload_nls(p_nls);
+}
+
+module_init(init_nls_koi8_ru)
+module_exit(exit_nls_koi8_ru)
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-indent-level: 8
+ * c-brace-imaginary-offset: 0
+ * c-brace-offset: -8
+ * c-argdecl-indent: 8
+ * c-label-offset: -8
+ * c-continued-statement-offset: 8
+ * c-continued-brace-offset: 0
+ * End:
+ */