+#ifdef _WIN32
+/*
+ * Wrapper for fopen() and _wfopen().
+ *
+ * If we're in UTF-8 mode, map the pathname from UTF-8 to UTF-16LE and
+ * call _wfopen().
+ *
+ * If we're not, just use fopen(); that'll treat it as being in the
+ * local code page.
+ */
+FILE *
+charset_fopen(const char *path, const char *mode)
+{
+ wchar_t *utf16_path;
+#define MAX_MODE_LEN 16
+ wchar_t utf16_mode[MAX_MODE_LEN+1];
+ int i;
+ char c;
+ FILE *fp;
+ int save_errno;
+
+ if (pcap_utf_8_mode) {
+ /*
+ * Map from UTF-8 to UTF-16LE.
+ * Fail if there are invalid characters in the input
+ * string, rather than converting them to REPLACEMENT
+ * CHARACTER; the latter is appropriate for strings
+ * to be displayed to the user, but for file names
+ * you just want the attempt to open the file to fail.
+ */
+ utf16_path = cp_to_utf_16le(CP_UTF8, path,
+ MB_ERR_INVALID_CHARS);
+ if (utf16_path == NULL) {
+ /*
+ * Error. Assume errno has been set.
+ *
+ * XXX - what about Windows errors?
+ */
+ return (NULL);
+ }
+
+ /*
+ * Now convert the mode to UTF-16LE as well.
+ * We assume the mode is ASCII, and that
+ * it's short, so that's easy.
+ */
+ for (i = 0; (c = *mode) != '\0'; i++, mode++) {
+ if (c > 0x7F) {
+ /* Not an ASCII character; fail with EINVAL. */
+ free(utf16_path);
+ errno = EINVAL;
+ return (NULL);
+ }
+ if (i >= MAX_MODE_LEN) {
+ /* The mode string is longer than we allow. */
+ free(utf16_path);
+ errno = EINVAL;
+ return (NULL);
+ }
+ utf16_mode[i] = c;
+ }
+ utf16_mode[i] = '\0';
+
+ /*
+ * OK, we have UTF-16LE strings; hand them to
+ * _wfopen().
+ */
+ fp = _wfopen(utf16_path, utf16_mode);
+
+ /*
+ * Make sure freeing the UTF-16LE string doesn't
+ * overwrite the error code we got from _wfopen().
+ */
+ save_errno = errno;
+ free(utf16_path);
+ errno = save_errno;
+
+ return (fp);
+ } else {
+ /*
+ * This takes strings in the local code page as an
+ * argument.
+ */
+ return (fopen(path, mode));
+ }
+}
+#endif
+
projects / libpcap / blobdiff