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| 2 | // translate.h -- data translation classes for StateIn and StateOut
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| 3 | //
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| 4 | // Copyright (C) 1997 Limit Point Systems, Inc.
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| 5 | //
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| 6 | // Author: Curtis Janssen <cljanss@limitpt.com>
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| 7 | // Maintainer: LPS
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| 8 | //
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| 9 | // This file is part of the SC Toolkit.
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| 10 | //
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| 11 | // The SC Toolkit is free software; you can redistribute it and/or modify
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| 12 | // it under the terms of the GNU Library General Public License as published by
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| 13 | // the Free Software Foundation; either version 2, or (at your option)
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| 14 | // any later version.
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| 15 | //
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| 16 | // The SC Toolkit is distributed in the hope that it will be useful,
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| 17 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | // GNU Library General Public License for more details.
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| 20 | //
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| 21 | // You should have received a copy of the GNU Library General Public License
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| 22 | // along with the SC Toolkit; see the file COPYING.LIB. If not, write to
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| 23 | // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | //
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| 25 | // The U.S. Government is granted a limited license as per AL 91-7.
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| 26 | //
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| 27 |
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| 28 | #ifndef _util_state_translate_h
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| 29 | #define _util_state_translate_h
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| 30 |
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| 31 | #ifdef HAVE_CONFIG_H
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| 32 | #include <scconfig.h>
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| 33 | #endif
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| 34 |
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| 35 | #if defined(WORDS_BIGENDIAN)
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| 36 | #define BIGENDIAN 1
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| 37 | #else
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| 38 | #define BIGENDIAN 0
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| 39 | #endif
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| 40 |
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| 41 | namespace sc {
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| 42 |
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| 43 | /** Generic data translation.
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| 44 | */
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| 45 | class TranslateData {
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| 46 | public:
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| 47 | TranslateData();
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| 48 | virtual ~TranslateData();
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| 49 |
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| 50 | /// Returns a code for the type of format for the external data.
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| 51 | virtual char format_code();
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| 52 |
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| 53 | /** A virtual constructor that choses a specialization based on
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| 54 | the format code. */
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| 55 | static TranslateData *vctor(char code);
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| 56 |
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| 57 | /** Translates to native format in-place.
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| 58 | Similar routines exist for all the basic types. */
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| 59 | virtual void to_native (char *, int n);
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| 60 | /** Translates to external format in-place.
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| 61 | Similar routines exist for all the basic types. */
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| 62 | virtual void to_external(char *, int n);
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| 63 | virtual void to_native (short *, int n);
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| 64 | virtual void to_external(short *, int n);
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| 65 | virtual void to_native (unsigned int *, int n);
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| 66 | virtual void to_external(unsigned int *, int n);
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| 67 | virtual void to_native (int *, int n);
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| 68 | virtual void to_external(int *, int n);
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| 69 | virtual void to_native (long *, int n);
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| 70 | virtual void to_external(long *, int n);
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| 71 | virtual void to_native (float *, int n);
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| 72 | virtual void to_external(float *, int n);
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| 73 | virtual void to_native (double *, int n);
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| 74 | virtual void to_external(double *, int n);
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| 75 |
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| 76 | /** Translates to native format.
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| 77 | Similar routines exist for all the basic types. */
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| 78 | virtual void to_native (char *target, const void *source, int n);
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| 79 | /** Translates to external format.
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| 80 | Similar routines exist for all the basic types. */
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| 81 | virtual void to_external(void *target, const char *source, int n);
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| 82 | virtual void to_native (short *, const void *, int n);
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| 83 | virtual void to_external(void *, const short *, int n);
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| 84 | virtual void to_native (unsigned int *, const void *, int n);
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| 85 | virtual void to_external(void *, const unsigned int *, int n);
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| 86 | virtual void to_native (int *, const void *, int n);
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| 87 | virtual void to_external(void *, const int *, int n);
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| 88 | virtual void to_native (long *, const void *, int n);
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| 89 | virtual void to_external(void *, const long *, int n);
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| 90 | virtual void to_native (float *, const void *, int n);
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| 91 | virtual void to_external(void *, const float *, int n);
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| 92 | virtual void to_native (double *, const void *, int n);
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| 93 | virtual void to_external(void *, const double *, int n);
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| 94 | };
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| 95 |
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| 96 | /** Data translation to an external representation with bytes swapped.
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| 97 | */
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| 98 | class TranslateDataByteSwap: public TranslateData {
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| 99 | public:
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| 100 | TranslateDataByteSwap();
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| 101 | virtual ~TranslateDataByteSwap();
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| 102 |
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| 103 | /// Returns a code for the type of format for the external data.
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| 104 | virtual char format_code();
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| 105 |
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| 106 | /// Overridden translation routines exist for all the basic types.
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| 107 | virtual void to_native (char *, int n);
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| 108 | /// Overridden translation routines exist for all the basic types.
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| 109 | virtual void to_external(char *, int n);
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| 110 | virtual void to_native (short *, int n);
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| 111 | virtual void to_external(short *, int n);
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| 112 | virtual void to_native (unsigned int *, int n);
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| 113 | virtual void to_external(unsigned int *, int n);
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| 114 | virtual void to_native (int *, int n);
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| 115 | virtual void to_external(int *, int n);
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| 116 | virtual void to_native (long *, int n);
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| 117 | virtual void to_external(long *, int n);
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| 118 | virtual void to_native (float *, int n);
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| 119 | virtual void to_external(float *, int n);
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| 120 | virtual void to_native (double *, int n);
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| 121 | virtual void to_external(double *, int n);
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| 122 |
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| 123 | /// Overridden translation routines exist for all the basic types.
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| 124 | virtual void to_native (char *, const void *, int n);
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| 125 | /// Overridden translation routines exist for all the basic types.
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| 126 | virtual void to_external(void *, const char *, int n);
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| 127 | virtual void to_native (short *, const void *, int n);
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| 128 | virtual void to_external(void *, const short *, int n);
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| 129 | virtual void to_native (unsigned int *, const void *, int n);
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| 130 | virtual void to_external(void *, const unsigned int *, int n);
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| 131 | virtual void to_native (int *, const void *, int n);
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| 132 | virtual void to_external(void *, const int *, int n);
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| 133 | virtual void to_native (long *, const void *, int n);
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| 134 | virtual void to_external(void *, const long *, int n);
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| 135 | virtual void to_native (float *, const void *, int n);
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| 136 | virtual void to_external(void *, const float *, int n);
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| 137 | virtual void to_native (double *, const void *, int n);
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| 138 | virtual void to_external(void *, const double *, int n);
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| 139 | };
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| 140 |
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| 141 | #if BIGENDIAN
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| 142 | typedef TranslateDataByteSwap TranslateDataLittleEndian;
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| 143 | typedef TranslateData TranslateDataBigEndian;
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| 144 | #else
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| 145 | typedef TranslateDataByteSwap TranslateDataBigEndian;
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| 146 | typedef TranslateData TranslateDataLittleEndian;
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| 147 | #endif
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| 148 |
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| 149 | class StateOut;
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| 150 |
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| 151 | /** Convert data to other formats.
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| 152 | The generated data is inserted into a StateOut object.
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| 153 | */
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| 154 | class TranslateDataOut {
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| 155 | private:
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| 156 | StateOut *so_;
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| 157 | TranslateData *translate_;
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| 158 | // the translation buffer
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| 159 | enum { bufsize = 8192 };
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| 160 | char buf_[bufsize];
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| 161 | protected:
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| 162 | int putv(const void*d,int s);
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| 163 | public:
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| 164 | /** Write to s using the translation defined by t.
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| 165 | The t argument will be deleted by this. */
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| 166 | TranslateDataOut(StateOut*s, TranslateData*t);
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| 167 | virtual ~TranslateDataOut();
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| 168 |
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| 169 | /** Translate and write the data. A similar member exists for
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| 170 | each basic type. */
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| 171 | virtual int put(const char*,int);
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| 172 | virtual int put(const short*,int);
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| 173 | virtual int put(const unsigned int*,int);
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| 174 | virtual int put(const int*,int);
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| 175 | virtual int put(const long*,int);
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| 176 | virtual int put(const float*,int);
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| 177 | virtual int put(const double*,int);
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| 178 |
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| 179 | /// Returns the translator.
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| 180 | TranslateData *translator() { return translate_; }
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| 181 | };
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| 182 |
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| 183 | class StateIn;
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| 184 |
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| 185 | /** Convert data from other formats.
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| 186 | The data is taken from a StateIn object.
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| 187 | */
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| 188 | class TranslateDataIn {
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| 189 | private:
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| 190 | StateIn *si_;
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| 191 | TranslateData *translate_;
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| 192 | protected:
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| 193 | int getv(void*d,int s);
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| 194 | public:
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| 195 | /** Input data will come from s. The t argument will be deleted by this.
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| 196 | */
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| 197 | TranslateDataIn(StateIn*s, TranslateData *t);
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| 198 | virtual ~TranslateDataIn();
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| 199 |
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| 200 | /** Read and translate data. A similar member exists for each basic
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| 201 | type. */
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| 202 | virtual int get(char*,int);
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| 203 | virtual int get(short*,int);
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| 204 | virtual int get(unsigned int*,int);
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| 205 | virtual int get(int*,int);
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| 206 | virtual int get(long*,int);
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| 207 | virtual int get(float*,int);
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| 208 | virtual int get(double*,int);
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| 209 |
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| 210 | /// Return the translator.
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| 211 | TranslateData *translator() { return translate_; }
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| 212 | };
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| 213 |
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| 214 | }
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| 215 |
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| 216 | #endif
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| 217 |
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| 218 | // Local Variables:
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| 219 | // mode: c++
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| 220 | // c-file-style: "CLJ"
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| 221 | // End:
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