int BKE_font_getselection(struct Object *ob, int *start, int *end);
-void chtoutf8(unsigned long c, char *o);
-void wcs2utf8s(char *dst, wchar_t *src);
-int wcsleninu8(wchar_t *src);
-int utf8towchar(wchar_t *w, char *c);
+size_t chtoutf8(const unsigned long c, char o[4]);
+void wcs2utf8s(char *dst, const wchar_t *src);
+size_t wcsleninu8(wchar_t *src);
+size_t utf8towchar(wchar_t *w, const char *c);
#ifdef __cplusplus
}