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otfdata.hh

// -*- related-file-name: "../../libefont/otfdata.cc" -*-
#ifndef EFONT_OTFDATA_HH
#define EFONT_OTFDATA_HH
#include <lcdf/string.hh>
#include <lcdf/vector.hh>
#include <lcdf/inttypes.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if NEED_ARPA_INET_H
# include <arpa/inet.h>
#endif
#if HAVE_BYTEORDER_H
# include <byteorder.h>
#elif HAVE_NETINET_IN_H
# include <netinet/in.h>
#elif HAVE_SYS_PARAM_H
# include <sys/param.h>
#elif defined(WIN32)
# ifdef __MSC_VER
#  pragma warning (disable: 4290)
# endif
# include <winsock2.h>
#else
# error "configury disaster! Report this error to kohler@icir.org"
#endif
class ErrorHandler;
namespace Efont { namespace OpenType {

class Error { public:
    String description;
    Error()                   : description(String::stable_string("unspecified error")) { }
    Error(const String &d)          : description(d) { }
};

class Bounds : public Error { public:
    Bounds()                        : Error(String::stable_string("bounds error")) { }
};

class Format : public Error { public:
    Format(const String& name)            : Error(name + " format error") { }
    Format(const String& name, const String& type)
                              : Error(name + " " + type + " format error") { }
};

class BlankTable : public Format { public:
    BlankTable(const String& name)  : Format(name, "blank table") { }
};

class Data { public:

    Data()                    { }
    Data(const String& str)         : _str(str) { _str.align(2); }
    // default copy constructor
    // default destructor

    operator const String&() const  { return _str; }

    int length() const              { return _str.length(); }

    inline uint8_t operator[](unsigned offset) const throw (Bounds);
    inline uint16_t u16(unsigned offset) const throw (Bounds);
    inline int16_t s16(unsigned offset) const throw (Bounds);
    inline uint32_t u32(unsigned offset) const throw (Bounds);    
    inline int32_t s32(unsigned offset) const throw (Bounds);

    Data subtable(unsigned offset) const throw (Bounds);
    Data offset_subtable(unsigned offset_offset) const throw (Bounds);

  private:

    String _str;
    
};

inline uint8_t Data::operator[](unsigned offset) const throw (Bounds)
{
    if (offset >= static_cast<unsigned>(_str.length()))
      throw Bounds();
    else
      return _str[offset];
}

inline uint16_t Data::u16(unsigned offset) const throw (Bounds)
{
    if (offset + 1 >= static_cast<unsigned>(_str.length()) || offset + 1 == 0)
      throw Bounds();
    else
      return ntohs(*reinterpret_cast<const uint16_t *>(_str.data() + offset));
}

inline int16_t Data::s16(unsigned offset) const throw (Bounds)
{
    if (offset + 1 >= static_cast<unsigned>(_str.length()) || offset + 1 == 0)
      throw Bounds();
    else
      return ntohs(*reinterpret_cast<const int16_t *>(_str.data() + offset));
}

inline uint32_t Data::u32(unsigned offset) const throw (Bounds)
{
    if (offset + 3 >= static_cast<unsigned>(_str.length()) || offset + 3 < 3)
      throw Bounds();
    else
      return (ntohs(*reinterpret_cast<const uint16_t *>(_str.data() + offset)) << 16)
          | ntohs(*reinterpret_cast<const uint16_t *>(_str.data() + offset + 2));
}

inline int32_t Data::s32(unsigned offset) const throw (Bounds)
{
    if (offset + 3 >= static_cast<unsigned>(_str.length()) || offset + 3 < 3)
      throw Bounds();
    else
      return (ntohs(*reinterpret_cast<const uint16_t *>(_str.data() + offset)) << 16)
          | ntohs(*reinterpret_cast<const uint16_t *>(_str.data() + offset + 2));
}

}}
#endif

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