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otfname.hh

// -*- related-file-name: "../../libefont/otfname.cc" -*-
#ifndef EFONT_OTFNAME_HH
#define EFONT_OTFNAME_HH
#include <efont/otf.hh>
#include <efont/otfdata.hh>   // for ntohl()
#include <lcdf/error.hh>
namespace Efont { namespace OpenType {

class Name { public:

    Name(const String &, ErrorHandler * = 0);
    // default destructor

    bool ok() const                 { return _error >= 0; }
    int error() const               { return _error; }

    enum NameID { N_COPYRIGHT = 0, N_FAMILY = 1, N_SUBFAMILY = 2,
              N_UNIQUEID = 3, N_FULLNAME = 4, N_VERSION = 5,
              N_POSTSCRIPT = 6, N_TRADEMARK = 7, N_MANUFACTURER = 8,
              N_DESIGNER = 9, N_DESCRIPTION = 10, N_VENDOR_URL = 11,
              N_DESIGNER_URL = 12, N_LICENSE_DESCRIPTION = 13,
              N_LICENSE_URL = 14 };
    enum Platform { P_UNICODE = 0, P_MACINTOSH = 1, P_MICROSOFT = 3 };
    enum { HEADER_SIZE = 6, NAMEREC_SIZE = 12 };
    
    typedef uint8_t namerecord_t[NAMEREC_SIZE];
    typedef const namerecord_t *const_iterator;

    inline static int nameid(const namerecord_t &);
    inline static int platform(const namerecord_t &);
    inline static int encoding(const namerecord_t &);
    inline static int language(const namerecord_t &);
    
    inline const_iterator begin() const;
    inline const_iterator end() const;
    String name(const_iterator) const;
    
    struct PlatformPred {
      inline PlatformPred(int nameid, int platform = -1, int encoding = -1, int language = -1);
      inline bool operator()(const namerecord_t &) const;
      private:
      int _nameid, _platform, _encoding, _language;
    };
    
    struct EnglishPlatformPred {
      EnglishPlatformPred(int nameid)     : _nameid(nameid) { }
      inline bool operator()(const namerecord_t &) const;
      private:
      int _nameid;
    };

  private:

    String _str;
    int _error;

    int parse_header(ErrorHandler *);
    
};


#define USHORT_AT(d)          (ntohs(*reinterpret_cast<const uint16_t *>(d)))

inline int Name::nameid(const namerecord_t &nr)
{
    return USHORT_AT(reinterpret_cast<const uint8_t *>(&nr) + 6);
}

inline int Name::platform(const namerecord_t &nr)
{
    return USHORT_AT(reinterpret_cast<const uint8_t *>(&nr));
}

inline int Name::encoding(const namerecord_t &nr)
{
    return USHORT_AT(reinterpret_cast<const uint8_t *>(&nr) + 2);
}

inline int Name::language(const namerecord_t &nr)
{
    return USHORT_AT(reinterpret_cast<const uint8_t *>(&nr) + 4);
}

inline Name::const_iterator Name::begin() const
{
    return reinterpret_cast<const_iterator>(_str.udata() + HEADER_SIZE);
}

inline Name::const_iterator Name::end() const
{
    if (_error >= 0) {
      int count = USHORT_AT(_str.data() + 2);
      return reinterpret_cast<const_iterator>(_str.udata() + HEADER_SIZE + NAMEREC_SIZE * count);
    } else
      return reinterpret_cast<const_iterator>(_str.udata() + HEADER_SIZE);
}

#undef USHORT_AT


inline Name::PlatformPred::PlatformPred(int nid, int p, int e, int l)
    : _nameid(nid), _platform(p), _encoding(e), _language(l)
{
}

inline bool Name::PlatformPred::operator()(const namerecord_t &i) const
{
    return (_nameid == nameid(i))
      && (_platform < 0 || _platform == platform(i))
      && (_encoding < 0 || _encoding == encoding(i))
      && (_language < 0 || _language == language(i));
}

inline bool Name::EnglishPlatformPred::operator()(const namerecord_t &i) const
{
    if (_nameid == nameid(i)) {
      int p = platform(i), e = encoding(i), l = language(i);
      return (p == P_MACINTOSH && e == 0 && l == 0)
          || (p == P_MICROSOFT && e == 1 && l == 0x409);
    } else
      return false;
}

}}
#endif

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