X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Futf8.c;h=3964e8b1ce300e65f07b7ae849e1c492994fe29e;hb=1210bc667d2d133814a0eb3cbcfcfb7e721fba9f;hp=62e2803919555d58af12f3a5960f9ca14812e9f9;hpb=f274ece0f76b5709408821e317e87aef76123db6;p=elogind.git

diff --git a/src/shared/utf8.c b/src/shared/utf8.c
index 62e280391..3964e8b1c 100644
--- a/src/shared/utf8.c
+++ b/src/shared/utf8.c
@@ -49,6 +49,7 @@
 #include <stdbool.h>
 
 #include "utf8.h"
+#include "util.h"
 
 #define FILTER_CHAR '_'
 
@@ -283,3 +284,39 @@ char *ascii_filter(const char *str) {
 
         return r;
 }
+
+char *utf16_to_utf8(const void *s, size_t length) {
+        char *r;
+        const uint8_t *f;
+        uint8_t *t;
+
+        r = new(char, (length*3+1)/2 + 1);
+        if (!r)
+                return NULL;
+
+        t = (uint8_t*) r;
+
+        for (f = s; f < (const uint8_t*) s + length; f += 2) {
+                uint16_t c;
+
+                c = (f[1] << 8) | f[0];
+
+                if (c == 0) {
+                        *t = 0;
+                        return r;
+                } else if (c < 0x80) {
+                        *(t++) = (uint8_t) c;
+                } else if (c < 0x800) {
+                        *(t++) = (uint8_t) (0xc0 | (c >> 6));
+                        *(t++) = (uint8_t) (0x80 | (c & 0x3f));
+                } else {
+                        *(t++) = (uint8_t) (0xe0 | (c >> 12));
+                        *(t++) = (uint8_t) (0x80 | ((c >> 6) & 0x3f));
+                        *(t++) = (uint8_t) (0x80 | (c & 0x3f));
+                }
+        }
+
+        *t = 0;
+
+        return r;
+}