}
#define UTF8_GET_NEXT if (unlikely((*p & 0xc0) != 0x80)) goto bad; u = (u << 6) | (*p++ & 0x3f)
+#define UTF8_CHECK_RANGE(r) if (unlikely(u < r)) goto bad
/**
* Decode a value from the range `[0, 0xFFFF]` (basic multilingual plane)
{
u &= 0x1f;
UTF8_GET_NEXT;
+ UTF8_CHECK_RANGE(0x80);
}
else if (likely(u < 0xf0))
{
u &= 0x0f;
UTF8_GET_NEXT;
UTF8_GET_NEXT;
+ UTF8_CHECK_RANGE(0x800);
}
else
goto bad;
static inline byte *utf8_32_get_repl(const byte *p, uint *uu, uint repl)
{
uint u = *p++;
+ uint limit;
if (u < 0x80)
;
else if (unlikely(u < 0xc0))
- {
- /* Incorrect byte sequence */
- bad:
- u = repl;
- }
+ goto bad;
else if (u < 0xe0)
{
u &= 0x1f;
+ limit = 0x80;
goto get1;
}
else if (u < 0xf0)
{
u &= 0x0f;
+ limit = 0x800;
goto get2;
}
else if (u < 0xf8)
{
u &= 0x07;
+ limit = 1 << 16;
goto get3;
}
else if (u < 0xfc)
{
u &= 0x03;
+ limit = 1 << 21;
goto get4;
}
else if (u < 0xfe)
{
u &= 0x01;
+ limit = 1 << 26;
UTF8_GET_NEXT;
get4: UTF8_GET_NEXT;
get3: UTF8_GET_NEXT;
get2: UTF8_GET_NEXT;
get1: UTF8_GET_NEXT;
+ if (unlikely(u < limit))
+ goto bad;
}
else
goto bad;
*uu = u;
return (byte *)p;
+
+bad:
+ /* Incorrect byte sequence */
+ *uu = repl;
+ return (byte *)p;
}
/**
return 6;
}
+/** Maximum number of bytes an UTF-8 character can have. **/
+#define UTF8_MAX_LEN 6
+
/**
* Encode an UTF-16LE character from the range `[0, 0xD7FF]` or `[0xE000,0x11FFFF]`;
* up to 4 bytes needed.
static inline uint unicode_sanitize_char(uint u)
{
if (u >= 0x10000 || // We don't accept anything outside the basic plane
- u >= 0xd800 && u < 0xf900 || // neither we do surrogates
+ u >= 0xd800 && u < 0xf900 || // neither we do surrogates and private use characters
u >= 0x80 && u < 0xa0 || // nor latin-1 control chars
u < 0x20 && u != '\t')
return UNI_REPLACEMENT;
* Count the number of Unicode characters in a zero-terminated UTF-8 string.
* Returned value for corrupted encoding is undefined, but is never greater than strlen().
**/
-uint utf8_strlen(const byte *str);
+size_t utf8_strlen(const byte *str);
/**
* Same as @utf8_strlen(), but returns at most @n characters.
**/
-uint utf8_strnlen(const byte *str, uint n);
+size_t utf8_strnlen(const byte *str, size_t n);
#endif