Added SDL_wcslcpy and SDL_wcslcat.

include/SDL_stdinc.h

@@ -470,6 +470,19 @@ extern DECLSPEC size_t SDLCALL SDL_strlen(const char *string);
 extern DECLSPEC size_t SDLCALL SDL_wcslen(const wchar_t * string);
 #endif
 
+#ifdef HAVE_WCSLCPY
+#define SDL_wcslcpy      wcslcpy
+#else
+extern DECLSPEC size_t SDLCALL SDL_wcslcpy(wchar_t *dst, const wchar_t *src, size_t maxlen);
+#endif
+
+#ifdef HAVE_WCSLCAT
+#define SDL_wcslcat      wcslcat
+#else
+extern DECLSPEC size_t SDLCALL SDL_wcslcat(wchar_t *dst, const wchar_t *src, size_t maxlen);
+#endif
+
+
 #ifdef HAVE_STRLCPY
 #define SDL_strlcpy     strlcpy
 #else

src/stdlib/SDL_string.c

@@ -363,6 +363,33 @@ SDL_wcslen(const wchar_t * string)
 }
 #endif
 
+#ifndef HAVE_WCSLCPY
+size_t
+SDL_wcslcpy(wchar_t *dst, const wchar_t *src, size_t maxlen)
+{
+    size_t srclen = SDL_wcslen(src);
+    if (maxlen > 0) {
+        size_t len = SDL_min(srclen, maxlen - 1);
+        SDL_memcpy(dst, src, len * sizeof(wchar_t));
+        dst[len] = '\0';
+    }
+    return srclen;
+}
+#endif
+
+#ifndef HAVE_WCSLCAT
+size_t
+SDL_wcslcat(wchar_t *dst, const wchar_t *src, size_t maxlen)
+{
+    size_t dstlen = SDL_wcslen(dst);
+    size_t srclen = SDL_wcslen(src);
+    if (dstlen < maxlen) {
+        SDL_wcslcpy(dst + dstlen, src, maxlen - dstlen);
+    }
+    return dstlen + srclen;
+}
+#endif
+
 #ifndef HAVE_STRLCPY
 size_t
 SDL_strlcpy(char *dst, const char *src, size_t maxlen)