- *puc = ((unsigned int) (c & 0x01) << 30)
- | ((unsigned int) (s[1] ^ 0x80) << 24)
- | ((unsigned int) (s[2] ^ 0x80) << 18)
- | ((unsigned int) (s[3] ^ 0x80) << 12)
- | ((unsigned int) (s[4] ^ 0x80) << 6)
- | (unsigned int) (s[5] ^ 0x80);
- return 6;
+ if ((s[2] ^ 0x80) < 0x40)
+ {
+ if ((s[3] ^ 0x80) < 0x40)
+ {
+ if ((s[4] ^ 0x80) < 0x40)
+ {
+ if ((s[5] ^ 0x80) < 0x40)
+ {
+ if (c >= 0xfd || s[1] >= 0x84)
+#endif
+ {
+ *puc = ((unsigned int) (c & 0x01) << 30)
+ | ((unsigned int) (s[1] ^ 0x80) << 24)
+ | ((unsigned int) (s[2] ^ 0x80) << 18)
+ | ((unsigned int) (s[3] ^ 0x80) << 12)
+ | ((unsigned int) (s[4] ^ 0x80) << 6)
+ | (unsigned int) (s[5] ^ 0x80);
+ return 6;
+ }
+#if CONFIG_UNICODE_SAFETY
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 6;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 5;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 4;
+ }
+ /* invalid multibyte character */
+ *puc = 0xfffd;
+ return 3;
+ }
+ /* invalid multibyte character */
+ return 2;