+ if (mbs_nbytes > INT_MAX) {
+ fwprintf(stderr, L"ERROR: too much data (%zu bytes)!\n",
+ mbs_nbytes);
+ return NULL;
+ }
+ if (mbs_nbytes == 0) {
+ *num_wchars_ret = 0;
+ return (wchar_t*)mbs;
+ }
+ int len = MultiByteToWideChar(CP_ACP,
+ MB_ERR_INVALID_CHARS,
+ mbs,
+ mbs_nbytes,
+ NULL,
+ 0);
+ if (len <= 0)
+ goto out_invalid;
+ wchar_t *wcs = malloc(len * sizeof(wchar_t));
+ if (!wcs) {
+ fwprintf(stderr, L"ERROR: out of memory!\n");
+ return NULL;
+ }
+ int len2 = MultiByteToWideChar(CP_ACP,
+ MB_ERR_INVALID_CHARS,
+ mbs,
+ mbs_nbytes,
+ wcs,
+ len);
+ if (len2 != len) {
+ free(wcs);
+ goto out_invalid;
+ }
+ *num_wchars_ret = len;
+ return wcs;
+out_invalid:
+ fwprintf(stderr,
+L"ERROR: Invalid multi-byte string in the text file you provided as input!\n"
+L" Maybe try converting your text file to UTF-16LE?\n"
+ );
+ return NULL;
+}