saveload.h

Go to the documentation of this file.
00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifndef SAVELOAD_H
00013 #define SAVELOAD_H
00014 
00015 #include "../fileio_type.h"
00016 #include "../strings_type.h"
00017 
00018 #ifdef SIZE_MAX
00019 #undef SIZE_MAX
00020 #endif
00021 
00022 #define SIZE_MAX ((size_t)-1)
00023 
00025 enum SaveOrLoadResult {
00026   SL_OK     = 0, 
00027   SL_ERROR  = 1, 
00028   SL_REINIT = 2, 
00029 };
00030 
00032 enum SaveOrLoadMode {
00033   SL_INVALID    = -1, 
00034   SL_LOAD       =  0, 
00035   SL_SAVE       =  1, 
00036   SL_OLD_LOAD   =  2, 
00037   SL_PNG        =  3, 
00038   SL_BMP        =  4, 
00039   SL_LOAD_CHECK =  5, 
00040 };
00041 
00043 enum SavegameType {
00044   SGT_TTD,    
00045   SGT_TTDP1,  
00046   SGT_TTDP2,  
00047   SGT_OTTD,   
00048   SGT_TTO,    
00049   SGT_INVALID = 0xFF 
00050 };
00051 
00052 void GenerateDefaultSaveName(char *buf, const char *last);
00053 void SetSaveLoadError(uint16 str);
00054 const char *GetSaveLoadErrorString();
00055 SaveOrLoadResult SaveOrLoad(const char *filename, int mode, Subdirectory sb, bool threaded = true);
00056 void WaitTillSaved();
00057 void ProcessAsyncSaveFinish();
00058 void DoExitSave();
00059 
00060 SaveOrLoadResult SaveWithFilter(struct SaveFilter *writer, bool threaded);
00061 SaveOrLoadResult LoadWithFilter(struct LoadFilter *reader);
00062 
00063 typedef void ChunkSaveLoadProc();
00064 typedef void AutolengthProc(void *arg);
00065 
00067 struct ChunkHandler {
00068   uint32 id;                          
00069   ChunkSaveLoadProc *save_proc;       
00070   ChunkSaveLoadProc *load_proc;       
00071   ChunkSaveLoadProc *ptrs_proc;       
00072   ChunkSaveLoadProc *load_check_proc; 
00073   uint32 flags;                       
00074 };
00075 
00076 struct NullStruct {
00077   byte null;
00078 };
00079 
00081 enum SLRefType {
00082   REF_ORDER         = 0, 
00083   REF_VEHICLE       = 1, 
00084   REF_STATION       = 2, 
00085   REF_TOWN          = 3, 
00086   REF_VEHICLE_OLD   = 4, 
00087   REF_ROADSTOPS     = 5, 
00088   REF_ENGINE_RENEWS = 6, 
00089   REF_CARGO_PACKET  = 7, 
00090   REF_ORDERLIST     = 8, 
00091 };
00092 
00094 enum ChunkType {
00095   CH_RIFF         =  0,
00096   CH_ARRAY        =  1,
00097   CH_SPARSE_ARRAY =  2,
00098   CH_TYPE_MASK    =  3,
00099   CH_LAST         =  8, 
00100   CH_AUTO_LENGTH  = 16,
00101 };
00102 
00111 enum VarTypes {
00112   /* 4 bits allocated a maximum of 16 types for NumberType */
00113   SLE_FILE_I8       = 0,
00114   SLE_FILE_U8       = 1,
00115   SLE_FILE_I16      = 2,
00116   SLE_FILE_U16      = 3,
00117   SLE_FILE_I32      = 4,
00118   SLE_FILE_U32      = 5,
00119   SLE_FILE_I64      = 6,
00120   SLE_FILE_U64      = 7,
00121   SLE_FILE_STRINGID = 8, 
00122   SLE_FILE_STRING   = 9,
00123   /* 6 more possible file-primitives */
00124 
00125   /* 4 bits allocated a maximum of 16 types for NumberType */
00126   SLE_VAR_BL    =  0 << 4,
00127   SLE_VAR_I8    =  1 << 4,
00128   SLE_VAR_U8    =  2 << 4,
00129   SLE_VAR_I16   =  3 << 4,
00130   SLE_VAR_U16   =  4 << 4,
00131   SLE_VAR_I32   =  5 << 4,
00132   SLE_VAR_U32   =  6 << 4,
00133   SLE_VAR_I64   =  7 << 4,
00134   SLE_VAR_U64   =  8 << 4,
00135   SLE_VAR_NULL  =  9 << 4, 
00136   SLE_VAR_STRB  = 10 << 4, 
00137   SLE_VAR_STRBQ = 11 << 4, 
00138   SLE_VAR_STR   = 12 << 4, 
00139   SLE_VAR_STRQ  = 13 << 4, 
00140   SLE_VAR_NAME  = 14 << 4, 
00141   /* 1 more possible memory-primitives */
00142 
00143   /* Shortcut values */
00144   SLE_VAR_CHAR = SLE_VAR_I8,
00145 
00146   /* Default combinations of variables. As savegames change, so can variables
00147    * and thus it is possible that the saved value and internal size do not
00148    * match and you need to specify custom combo. The defaults are listed here */
00149   SLE_BOOL         = SLE_FILE_I8  | SLE_VAR_BL,
00150   SLE_INT8         = SLE_FILE_I8  | SLE_VAR_I8,
00151   SLE_UINT8        = SLE_FILE_U8  | SLE_VAR_U8,
00152   SLE_INT16        = SLE_FILE_I16 | SLE_VAR_I16,
00153   SLE_UINT16       = SLE_FILE_U16 | SLE_VAR_U16,
00154   SLE_INT32        = SLE_FILE_I32 | SLE_VAR_I32,
00155   SLE_UINT32       = SLE_FILE_U32 | SLE_VAR_U32,
00156   SLE_INT64        = SLE_FILE_I64 | SLE_VAR_I64,
00157   SLE_UINT64       = SLE_FILE_U64 | SLE_VAR_U64,
00158   SLE_CHAR         = SLE_FILE_I8  | SLE_VAR_CHAR,
00159   SLE_STRINGID     = SLE_FILE_STRINGID | SLE_VAR_U16,
00160   SLE_STRINGBUF    = SLE_FILE_STRING   | SLE_VAR_STRB,
00161   SLE_STRINGBQUOTE = SLE_FILE_STRING   | SLE_VAR_STRBQ,
00162   SLE_STRING       = SLE_FILE_STRING   | SLE_VAR_STR,
00163   SLE_STRINGQUOTE  = SLE_FILE_STRING   | SLE_VAR_STRQ,
00164   SLE_NAME         = SLE_FILE_STRINGID | SLE_VAR_NAME,
00165 
00166   /* Shortcut values */
00167   SLE_UINT  = SLE_UINT32,
00168   SLE_INT   = SLE_INT32,
00169   SLE_STRB  = SLE_STRINGBUF,
00170   SLE_STRBQ = SLE_STRINGBQUOTE,
00171   SLE_STR   = SLE_STRING,
00172   SLE_STRQ  = SLE_STRINGQUOTE,
00173 
00174   /* 8 bits allocated for a maximum of 8 flags
00175    * Flags directing saving/loading of a variable */
00176   SLF_NOT_IN_SAVE     = 1 <<  8, 
00177   SLF_NOT_IN_CONFIG   = 1 <<  9, 
00178   SLF_NO_NETWORK_SYNC = 1 << 10, 
00179   /* 5 more possible flags */
00180 };
00181 
00182 typedef uint32 VarType;
00183 
00185 enum SaveLoadTypes {
00186   SL_VAR         =  0, 
00187   SL_REF         =  1, 
00188   SL_ARR         =  2, 
00189   SL_STR         =  3, 
00190   SL_LST         =  4, 
00191   /* non-normal save-load types */
00192   SL_WRITEBYTE   =  8,
00193   SL_VEH_INCLUDE =  9,
00194   SL_ST_INCLUDE  = 10,
00195   SL_END         = 15
00196 };
00197 
00198 typedef byte SaveLoadType; 
00199 
00201 struct SaveLoad {
00202   bool global;         
00203   SaveLoadType cmd;    
00204   VarType conv;        
00205   uint16 length;       
00206   uint16 version_from; 
00207   uint16 version_to;   
00208   /* NOTE: This element either denotes the address of the variable for a global
00209    * variable, or the offset within a struct which is then bound to a variable
00210    * during runtime. Decision on which one to use is controlled by the function
00211    * that is called to save it. address: global=true, offset: global=false */
00212   void *address;       
00213 };
00214 
00216 typedef SaveLoad SaveLoadGlobVarList;
00217 
00228 #define SLE_GENERAL(cmd, base, variable, type, length, from, to) {false, cmd, type, length, from, to, (void*)cpp_offsetof(base, variable)}
00229 
00238 #define SLE_CONDVAR(base, variable, type, from, to) SLE_GENERAL(SL_VAR, base, variable, type, 0, from, to)
00239 
00248 #define SLE_CONDREF(base, variable, type, from, to) SLE_GENERAL(SL_REF, base, variable, type, 0, from, to)
00249 
00259 #define SLE_CONDARR(base, variable, type, length, from, to) SLE_GENERAL(SL_ARR, base, variable, type, length, from, to)
00260 
00270 #define SLE_CONDSTR(base, variable, type, length, from, to) SLE_GENERAL(SL_STR, base, variable, type, length, from, to)
00271 
00280 #define SLE_CONDLST(base, variable, type, from, to) SLE_GENERAL(SL_LST, base, variable, type, 0, from, to)
00281 
00288 #define SLE_VAR(base, variable, type) SLE_CONDVAR(base, variable, type, 0, SL_MAX_VERSION)
00289 
00296 #define SLE_REF(base, variable, type) SLE_CONDREF(base, variable, type, 0, SL_MAX_VERSION)
00297 
00305 #define SLE_ARR(base, variable, type, length) SLE_CONDARR(base, variable, type, length, 0, SL_MAX_VERSION)
00306 
00314 #define SLE_STR(base, variable, type, length) SLE_CONDSTR(base, variable, type, length, 0, SL_MAX_VERSION)
00315 
00322 #define SLE_LST(base, variable, type) SLE_CONDLST(base, variable, type, 0, SL_MAX_VERSION)
00323 
00328 #define SLE_NULL(length) SLE_CONDNULL(length, 0, SL_MAX_VERSION)
00329 
00336 #define SLE_CONDNULL(length, from, to) SLE_CONDARR(NullStruct, null, SLE_FILE_U8 | SLE_VAR_NULL | SLF_NOT_IN_CONFIG, length, from, to)
00337 
00339 #define SLE_WRITEBYTE(base, variable, value) SLE_GENERAL(SL_WRITEBYTE, base, variable, 0, 0, value, value)
00340 
00341 #define SLE_VEH_INCLUDE() {false, SL_VEH_INCLUDE, 0, 0, 0, SL_MAX_VERSION, NULL}
00342 #define SLE_ST_INCLUDE() {false, SL_ST_INCLUDE, 0, 0, 0, SL_MAX_VERSION, NULL}
00343 
00345 #define SLE_END() {false, SL_END, 0, 0, 0, 0, NULL}
00346 
00356 #define SLEG_GENERAL(cmd, variable, type, length, from, to) {true, cmd, type, length, from, to, (void*)&variable}
00357 
00365 #define SLEG_CONDVAR(variable, type, from, to) SLEG_GENERAL(SL_VAR, variable, type, 0, from, to)
00366 
00374 #define SLEG_CONDREF(variable, type, from, to) SLEG_GENERAL(SL_REF, variable, type, 0, from, to)
00375 
00384 #define SLEG_CONDARR(variable, type, length, from, to) SLEG_GENERAL(SL_ARR, variable, type, length, from, to)
00385 
00394 #define SLEG_CONDSTR(variable, type, length, from, to) SLEG_GENERAL(SL_STR, variable, type, length, from, to)
00395 
00403 #define SLEG_CONDLST(variable, type, from, to) SLEG_GENERAL(SL_LST, variable, type, 0, from, to)
00404 
00410 #define SLEG_VAR(variable, type) SLEG_CONDVAR(variable, type, 0, SL_MAX_VERSION)
00411 
00417 #define SLEG_REF(variable, type) SLEG_CONDREF(variable, type, 0, SL_MAX_VERSION)
00418 
00424 #define SLEG_ARR(variable, type) SLEG_CONDARR(variable, type, lengthof(variable), 0, SL_MAX_VERSION)
00425 
00431 #define SLEG_STR(variable, type) SLEG_CONDSTR(variable, type, lengthof(variable), 0, SL_MAX_VERSION)
00432 
00438 #define SLEG_LST(variable, type) SLEG_CONDLST(variable, type, 0, SL_MAX_VERSION)
00439 
00446 #define SLEG_CONDNULL(length, from, to) {true, SL_ARR, SLE_FILE_U8 | SLE_VAR_NULL | SLF_NOT_IN_CONFIG, length, from, to, (void*)NULL}
00447 
00449 #define SLEG_END() {true, SL_END, 0, 0, 0, 0, NULL}
00450 
00457 static inline bool IsSavegameVersionBefore(uint16 major, byte minor = 0)
00458 {
00459   extern uint16 _sl_version;
00460   extern byte   _sl_minor_version;
00461   return _sl_version < major || (minor > 0 && _sl_version == major && _sl_minor_version < minor);
00462 }
00463 
00471 static inline bool SlIsObjectCurrentlyValid(uint16 version_from, uint16 version_to)
00472 {
00473   extern const uint16 SAVEGAME_VERSION;
00474   if (SAVEGAME_VERSION < version_from || SAVEGAME_VERSION > version_to) return false;
00475 
00476   return true;
00477 }
00478 
00485 static inline VarType GetVarMemType(VarType type)
00486 {
00487   return type & 0xF0; // GB(type, 4, 4) << 4;
00488 }
00489 
00496 static inline VarType GetVarFileType(VarType type)
00497 {
00498   return type & 0xF; // GB(type, 0, 4);
00499 }
00500 
00506 static inline bool IsNumericType(VarType conv)
00507 {
00508   return GetVarMemType(conv) <= SLE_VAR_U64;
00509 }
00510 
00517 static inline void *GetVariableAddress(const void *object, const SaveLoad *sld)
00518 {
00519   return (byte*)(sld->global ? NULL : object) + (ptrdiff_t)sld->address;
00520 }
00521 
00522 int64 ReadValue(const void *ptr, VarType conv);
00523 void WriteValue(void *ptr, VarType conv, int64 val);
00524 
00525 void SlSetArrayIndex(uint index);
00526 int SlIterateArray();
00527 
00528 void SlAutolength(AutolengthProc *proc, void *arg);
00529 size_t SlGetFieldLength();
00530 void SlSetLength(size_t length);
00531 size_t SlCalcObjMemberLength(const void *object, const SaveLoad *sld);
00532 size_t SlCalcObjLength(const void *object, const SaveLoad *sld);
00533 
00534 byte SlReadByte();
00535 void SlWriteByte(byte b);
00536 
00537 void SlGlobList(const SaveLoadGlobVarList *sldg);
00538 void SlArray(void *array, size_t length, VarType conv);
00539 void SlObject(void *object, const SaveLoad *sld);
00540 bool SlObjectMember(void *object, const SaveLoad *sld);
00541 void NORETURN SlError(StringID string, const char *extra_msg = NULL);
00542 void NORETURN SlErrorCorrupt(const char *msg);
00543 
00544 bool SaveloadCrashWithMissingNewGRFs();
00545 
00546 extern char _savegame_format[8];
00547 extern bool _do_autosave;
00548 
00553 enum SaveLoadVersions {
00554   SL_TRUNK = 160,
00555   SL_RESERVATION = SL_TRUNK + 10,
00556   SL_CAPACITIES = SL_TRUNK + 20,
00557   SL_COMPONENTS,
00558   SL_DEMANDS = SL_COMPONENTS + 20,
00559   SL_MCF,
00560   SL_FLOWMAP,
00561   SL_CARGOMAP,
00562   SL_EXT_RATING,
00563 
00565   SL_MAX_VERSION = 255
00566 };
00567 
00568 #endif /* SAVELOAD_H */

Generated on Sun Jun 5 04:20:02 2011 for OpenTTD by  doxygen 1.6.1