“Função de acabamento” Respostas de código

Função de acabamento

/* Remove leading whitespaces */
char *ltrim(char *const s)
{
        size_t len;
        char *cur;

        if(s && *s) {
                len = strlen(s);
                cur = s;

                while(*cur && isspace(*cur))
                        ++cur, --len;

                if(s != cur)
                        memmove(s, cur, len + 1);

        }

        return s;
}

/* Remove trailing whitespaces */
char *rtrim(char *const s)
{
        size_t len;
        char *cur;

        if(s && *s) {
                len = strlen(s);
                cur = s + len - 1;

                while(cur != s && isspace(*cur))
                        --cur, --len;

                cur[isspace(*cur) ? 0 : 1] = '\0';
        }

        return s;
}

/* Remove leading and trailing whitespaces */
char *trim(char *const s)
{
        rtrim(s);  // order matters
        ltrim(s);

        return s;
}