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Returns the number of bytes needed for the UTF-8 codepoint starting at p.
Source position: lazutf8.pas line 77
function UTF8CharacterLength( |
p: PChar |
):Integer; |
p |
|
Pointer to the value examined in the routine. |
Number of bytes required for the UTF-8 codepoint, or 0 (zero).
| Remark: | Deprecated. Use UTF8CodepointSize instead. |
It returns 0 if p is nil. It returns 1 if p is a 1-byte UTF-8 codepoint or p is an invalid UTF-8 sequence. Otherwise it returns a number 2..4. It does not check for malicious codepoints like #$c0#$80, nor for undefined codepoints like #$f3#$a0#$87#$b9. Use UTF8CharacterLength to step through a string with a simple loop:
while p^ <> #0 do begin inc(p, UTF8CharacterLength(p)); end;
Even if p contains invalid UTF-8 codepoints it will run through the string without overflow.
|
Returns the length in bytes (1..4) for a valid UTF-8 character. Otherwise 0. |
| Version 3.2 | Generated 2024-02-25 | Home |