00001 /* 00002 00003 Copyright (C) 1996, 1997 John W. Eaton 00004 00005 This file is part of Octave. 00006 00007 Octave is free software; you can redistribute it and/or modify it 00008 under the terms of the GNU General Public License as published by the 00009 Free Software Foundation; either version 2, or (at your option) any 00010 later version. 00011 00012 Octave is distributed in the hope that it will be useful, but WITHOUT 00013 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 00015 for more details. 00016 00017 You should have received a copy of the GNU General Public License 00018 along with Octave; see the file COPYING. If not, write to the Free 00019 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00020 00021 */ 00022 00023 #if !defined (octave_mach_info_h) 00024 #define octave_mach_info_h 1 00025 00026 #include <string> 00027 00028 class 00029 oct_mach_info 00030 { 00031 protected: 00032 00033 oct_mach_info (void); 00034 00035 public: 00036 00037 enum float_format 00038 { 00039 flt_fmt_unknown, 00040 flt_fmt_ieee_little_endian, 00041 flt_fmt_ieee_big_endian, 00042 flt_fmt_vax_d, 00043 flt_fmt_vax_g, 00044 flt_fmt_cray 00045 }; 00046 00047 static bool instance_ok (void); 00048 00049 static float_format native_float_format (void); 00050 00051 static bool words_big_endian (void); 00052 00053 static bool words_little_endian (void); 00054 00055 static float_format string_to_float_format (const std::string&); 00056 00057 static std::string float_format_as_string (float_format); 00058 00059 private: 00060 00061 static oct_mach_info *instance; 00062 00063 void init_float_format (void) const; 00064 00065 void ten_little_endians (void) const; 00066 00067 // The floating point format for the current machine. 00068 mutable float_format native_float_fmt; 00069 00070 // TRUE if the byte order on this system is big endian. 00071 mutable bool big_chief; 00072 00073 // No copying! 00074 00075 oct_mach_info (const oct_mach_info&); 00076 00077 oct_mach_info& operator = (const oct_mach_info&); 00078 }; 00079 00080 #endif 00081 00082 /* 00083 ;;; Local Variables: *** 00084 ;;; mode: C++ *** 00085 ;;; End: *** 00086 */
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