Manual

UTF-8 string routines

About UTF-8 string routines
UTF-8 string types
- ALLEGRO_USTR
- ALLEGRO_USTR_INFO
Creating and destroying strings
Predefined strings
- al_ustr_empty_string
Creating strings by referencing other data
Sizes and offsets
Getting code points
Inserting into strings
Appending to strings
Removing parts of strings
Assigning one string to another
Replacing parts of string
- al_ustr_set_chr
- al_ustr_replace_range
Searching
Comparing
UTF-16 conversion
Low-level UTF-8 routines
- al_utf8_width
- al_utf8_encode
Low-level UTF-16 routines
- al_utf16_width
- al_utf16_encode

al_ustr_find_cset

int al_ustr_find_cset(const ALLEGRO_USTR *us, int start_pos,
   const ALLEGRO_USTR *reject)

Introduced in 5.0.0

This function finds the first code point in us, beginning from byte offset start_pos, that does not match any code point in reject. In other words it finds a code point in the complementary set of reject. Returns the byte position of that code point, if any. Otherwise returns -1.

Examples: ex_utf8