Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / nls / nls_utf8.c

diff --git a/kernel/fs/nls/nls_utf8.c b/kernel/fs/nls/nls_utf8.c
new file mode 100644 (file)
index 0000000..afcfbc4
--- /dev/null
+++ b/kernel/fs/nls/nls_utf8.c
@@ -0,0 +1,67 @@
+/*
+ * Module for handling utf8 just like any other charset.
+ * By Urban Widmark 2000
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/errno.h>
+
+static unsigned char identity[256];
+
+static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
+{
+       int n;
+
+       if (boundlen <= 0)
+               return -ENAMETOOLONG;
+
+       n = utf32_to_utf8(uni, out, boundlen);
+       if (n < 0) {
+               *out = '?';
+               return -EINVAL;
+       }
+       return n;
+}
+
+static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
+{
+       int n;
+       unicode_t u;
+
+       n = utf8_to_utf32(rawstring, boundlen, &u);
+       if (n < 0 || u > MAX_WCHAR_T) {
+               *uni = 0x003f;  /* ? */
+               return -EINVAL;
+       }
+       *uni = (wchar_t) u;
+       return n;
+}
+
+static struct nls_table table = {
+       .charset        = "utf8",
+       .uni2char       = uni2char,
+       .char2uni       = char2uni,
+       .charset2lower  = identity,     /* no conversion */
+       .charset2upper  = identity,
+};
+
+static int __init init_nls_utf8(void)
+{
+       int i;
+       for (i=0; i<256; i++)
+               identity[i] = i;
+
+        return register_nls(&table);
+}
+
+static void __exit exit_nls_utf8(void)
+{
+        unregister_nls(&table);
+}
+
+module_init(init_nls_utf8)
+module_exit(exit_nls_utf8)
+MODULE_LICENSE("Dual BSD/GPL");