al_ustr_truncate
bool al_ustr_truncate(ALLEGRO_USTR *us, int start_pos)
Truncate a portion of a string at byte offset start_pos onwards. start_pos can be past the end of the string (has no effect) but cannot be less than 0.
Returns true on success, false on error.
See also: al_ustr_remove_range, al_ustr_ltrim_ws, al_ustr_rtrim_ws, al_ustr_trim_ws
Examples: ex_utf8
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