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120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#ifndef SAVELOAD_H
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#define SAVELOAD_H
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// To work around a warning in GCC 3.2 (and 3.1 ?) regarding non-POD types,
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// we use a small trick: instead of 0 we use 42. Why? Well, it seems newer GCC
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// versions hae a heuristic built in to detect "offset-of" patterns - which is exactly
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// what our OFFS macro does. Now, for non-POD types this is not really legal, because
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// member need not be at a fixed offset relative to the variable, even if they are in
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// current reality (many of our complex structs are non-POD; for an explanation of
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// what POD means refer to http://www-cpd.fnal.gov/personal/wb/boost/ISOcxx/doc/POD.html)
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#define OFFS(type,item) (((int)(&((type*)42)->type::item))-42)
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#define SIZE(type,item) sizeof(((type*)42)->type::item)
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#define MKLINE(type,item,saveas) {OFFS(type,item),saveas,SIZE(type,item)}
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#define MKARRAY(type,item,saveas,num) {OFFS(type,item),128|saveas,SIZE(type,item)}, {num,0,0}
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#define MKEND() {0xFFFF,0xFF,0xFF}
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#define MKREF(type,item,refid) {OFFS(type,item),refid,0xFF}
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enum {
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sleByte = 1,
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sleUint8 = 1,
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sleInt8 = 1,
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sleInt16 = 2,
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sleUint16 = 3,
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sleInt32 = 4,
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sleUint32 = 5
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};
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struct SaveLoadEntry {
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uint32 offs;
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uint8 type;
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uint8 size;
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};
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struct SerializerStream {
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#ifdef NONSTANDARD_SAVE
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void *context;
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bool fopen(const char *filename, const char *mode);
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void fclose();
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int fread(void *buf, int size, int cnt);
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int fwrite(void *buf, int size, int cnt);
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#else
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FILE *out;
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FILE *fopen(const char *filename, const char *mode) {
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return out = ::fopen(filename, mode);
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}
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void fclose() {
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::fclose(out);
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}
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int fread(void *buf, int size, int cnt) {
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return ::fread(buf, size, cnt, out);
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}
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int fwrite(void *buf, int size, int cnt) {
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return ::fwrite(buf, size, cnt, out);
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}
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#endif
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};
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typedef int SerializerSaveReference(void *me, byte type, void *ref);
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typedef void *SerializerLoadReference(void *me, byte type, int ref);
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struct Serializer {
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SerializerStream _saveLoadStream;
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union {
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SerializerSaveReference *_save_ref;
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SerializerLoadReference *_load_ref;
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void *_saveload_ref;
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};
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void *_ref_me;
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bool _saveOrLoad;
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void saveBytes(void *b, int len);
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void loadBytes(void *b, int len);
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void saveLoadArrayOf(void *b, int len, int datasize, byte filetype);
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void saveLoadEntries(void *d, const SaveLoadEntry *sle);
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void saveLoadArrayOf(void *b, int num, int datasize, const SaveLoadEntry *sle);
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void saveUint32(uint32 d);
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void saveWord(uint16 d);
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void saveByte(byte b);
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byte loadByte();
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uint16 loadWord();
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uint32 loadUint32();
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bool isSaving() { return _saveOrLoad; }
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bool checkEOFLoadStream();
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};
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#endif
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