+ dest = iconv_alloc(cd, str);
+
+ {
+ int save_errno = errno;
+
+ if (iconv_close (cd) < 0 && dest)
+ {
+ int save_errno2 = errno;
+ /* If we didn't have a real error before, make sure we restore
+ the iconv_close error below. */
+ free (dest);
+ dest = NULL;
+ errno = save_errno2;
+ }
+ else
+ errno = save_errno;
+ }
+#else
+ errno = ENOSYS;
+#endif
+
+ return dest;
+}
+
+/* Convert a zero-terminated string STR using iconv descriptor CD.
+ The returned string is allocated using malloc, and must be
+ dellocated by the caller using free. On failure, NULL is returned
+ and errno holds the error reason. Note that if the target
+ character set uses \0 for anything but to terminate the string,
+ the caller of this function may have difficulties finding
+ out the length of the output string. */
+#if HAVE_ICONV
+char *
+iconv_alloc (iconv_t cd, const char *str)
+{
+ char *dest;
+ char *p = (char *) str;
+ char *outp;
+ size_t inbytes_remaining = strlen (p);
+ /* Guess the maximum length the output string can have. */
+ size_t outbuf_size = inbytes_remaining + 1;
+ size_t outbytes_remaining;
+ size_t err;
+ int have_error = 0;
+
+ /* Use a worst-case output size guess, so long as that wouldn't be
+ too large for comfort. It's OK if the guess is wrong so long as
+ it's nonzero. */
+ size_t approx_sqrt_SIZE_MAX = SIZE_MAX >> (sizeof (size_t) * CHAR_BIT / 2);
+ if (outbuf_size <= approx_sqrt_SIZE_MAX / MB_LEN_MAX)
+ outbuf_size *= MB_LEN_MAX;
+ outbytes_remaining = outbuf_size - 1;
+