foobar2000/helpers/string_filter.h

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class string_filter_noncasesensitive {
public:
        string_filter_noncasesensitive(const char * p_string,t_size p_string_len = infinite) {
                uStringLower(m_pattern,p_string,p_string_len);
        }

        bool test(const char * p_string,t_size p_string_len = infinite) const {
		::uStringLower(m_lowercasebuffer,p_string,p_string_len);
                t_size walk = 0;
                while(m_pattern[walk] != 0) {
                        while(m_pattern[walk] == ' ') walk++;
                        t_size delta = 0;
                        while(m_pattern[walk+delta] != 0 && m_pattern[walk+delta] != ' ') delta++;
                        if (delta > 0) {
                                if (pfc::string_find_first_ex(m_lowercasebuffer,infinite,m_pattern+walk,delta) == infinite) return false;
                        }
                        walk += delta;
                }
                return true;
        }
private:
        mutable pfc::string8_fastalloc m_lowercasebuffer;
        pfc::string8 m_pattern;
};

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