Clarifying further for the devs dealing first time with str structure: the functions working with them do not change the content of the input value, it sets (shifts) the start pointer str.s and adjusts the length str.len.

Also, in many cases the str.s does not point to a zero-terminated string value of length str.len, that's why printing it in logs must be done with %.*s which requires first to provide the lenght. There are acases when str.s points to a zero-terminated string, but the developer has to track the origin of the value and be sure it is zero-terminated.

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