FindInvalidUTF8Codepoint function

In unit LazUTF8

Finds the position where an invalid UTF-8 codepoint is found in the string.

Declaration

pascal

function FindInvalidUTF8Codepoint(p: PChar; Count: PtrInt; 
 StopOnNonUTF8: Boolean=True): PtrInt

Description

FindInvalidUTF8Codepoint is a PtrInt function used to find the position where an invalid UTF-8 codepoint is located in the specified value. The return value contains -1 when none of the values in p are invalid, or the zero-based offset into p where the invalid encoding was located.

StopOnNonUTF8 indicates if the function should exit when an encoded value is found that is not defined for the UTF-8 encoding, or for single byte characters inserted in the middle of a UTF-8 encoding (used in XSS attacks).

An experiment, built from Lazarus main 2dfa93c66e of 10-22-2026. Not the official Lazarus documentation.