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#ifndef INCLUDED_BOBCAT_STRING_
#define INCLUDED_BOBCAT_STRING_

#include <cstring>
#include <string>
#include <vector>
#include <cctype>

namespace FBB
{

struct String
{
    enum Type
    {
        DQUOTE_UNTERMINATED,    // unterminated d-quoted element
        SQUOTE_UNTERMINATED,    // unterminated s-quoted element
        ESCAPED_END,            // word with plain \ at the end
        SEPARATOR, // separator encountered
        NORMAL, // normal string-element in the original string
        DQUOTE, // string-element originally surrounded by " chars
        SQUOTE, // string-element originally surrounded by ' chars
    };
    typedef std::pair<std::string, Type> SplitPair;

    static char const **argv(std::vector<std::string> const &lines);

    static int casecmp(std::string const &lhs, std::string const &rhs); // .f
    static std::string lc(std::string const &str);

    static std::vector<std::string>                             // 1
        split(Type *type, std::string const &str, 
                std::string const &separators = " \t", bool addEmpty = false);

    static std::vector<SplitPair>                              // 3
        split(std::string const &str, std::string const &separators = " \t", 
              bool addEmpty = false);

    static size_t split(std::vector<std::string> *words,        // 4
                    std::string const &str, char const *separators = " \t",
                    bool addEmpty = false);
                                                                // 5
    static size_t split(std::vector<SplitPair> *words, std::string const &str,
                    char const *separators = " \t", bool addEmpty = false);

    static std::string trim(std::string const &str);
    static std::string uc(std::string const &str);
    static std::string unescape(std::string const &str);
    static std::string escape(std::string const &str, 
                        char const *series = "'\"\\");

    private:
        typedef std::string::const_iterator ConstIter;
        typedef std::pair<int, Type> IntType;

                            // used by split1..3.cc
        static SplitPair split(ConstIter &begin, ConstIter const &end, // 6
                                    std::string const &separators);
        static SplitPair dquotedString(ConstIter &begin, 
                                       ConstIter const &end);
        static SplitPair quotedString(ConstIter &begin, ConstIter const &end);
        static IntType escapedString(ConstIter &begin, ConstIter const &end);

        static Type nextField(std::string const &str,
                        ConstIter *until, ConstIter from,
                        std::string const &separators);
        static ConstIter separator(std::string const &str,
                                ConstIter from, 
                                std::string const &separators);
        static ConstIter quoted(std::string const &str,
                                ConstIter from, int quote);
        static Type word(std::string const &str,
                            ConstIter *until, ConstIter from, 
                            std::string const &separators);

        static void tolower(char &chr);             // .f
        static void toupper(char &chr);             // .f
};

inline int String::casecmp(std::string const &lhs, std::string const &rhs)
{
    return strcasecmp(lhs.c_str(), rhs.c_str());
}

} // FBB


#endif