00001
00002
00003
00004
00005
00006
00007
00008
00009
00012 #ifndef OLDLOADER_H
00013 #define OLDLOADER_H
00014
00015 #include "saveload.h"
00016
00017 enum {
00018 BUFFER_SIZE = 4096,
00019 OLD_MAP_SIZE = 256 * 256,
00020 };
00021
00022 struct LoadgameState {
00023 FILE *file;
00024
00025 uint chunk_size;
00026
00027 bool decoding;
00028 byte decode_char;
00029
00030 uint buffer_count;
00031 uint buffer_cur;
00032 byte buffer[BUFFER_SIZE];
00033
00034 uint total_read;
00035 bool failed;
00036 };
00037
00038
00039 enum OldChunkType {
00040 OC_SIMPLE = 0,
00041 OC_NULL = 1,
00042 OC_CHUNK = 2,
00043 OC_ASSERT = 3,
00044
00045
00046 OC_TTD = 1 << 4,
00047 OC_TTO = 1 << 5,
00048
00049
00050 OC_VAR_I8 = 1 << 8,
00051 OC_VAR_U8 = 2 << 8,
00052 OC_VAR_I16 = 3 << 8,
00053 OC_VAR_U16 = 4 << 8,
00054 OC_VAR_I32 = 5 << 8,
00055 OC_VAR_U32 = 6 << 8,
00056 OC_VAR_I64 = 7 << 8,
00057 OC_VAR_U64 = 8 << 8,
00058
00059
00060 OC_FILE_I8 = 1 << 16,
00061 OC_FILE_U8 = 2 << 16,
00062 OC_FILE_I16 = 3 << 16,
00063 OC_FILE_U16 = 4 << 16,
00064 OC_FILE_I32 = 5 << 16,
00065 OC_FILE_U32 = 6 << 16,
00066
00067
00068 OC_INT8 = OC_VAR_I8 | OC_FILE_I8,
00069 OC_UINT8 = OC_VAR_U8 | OC_FILE_U8,
00070 OC_INT16 = OC_VAR_I16 | OC_FILE_I16,
00071 OC_UINT16 = OC_VAR_U16 | OC_FILE_U16,
00072 OC_INT32 = OC_VAR_I32 | OC_FILE_I32,
00073 OC_UINT32 = OC_VAR_U32 | OC_FILE_U32,
00074
00075 OC_TILE = OC_VAR_U32 | OC_FILE_U16,
00076
00081 OC_DEREFERENCE_POINTER = 1 << 31,
00082
00083 OC_END = 0
00084 };
00085
00086 DECLARE_ENUM_AS_BIT_SET(OldChunkType);
00087
00088 typedef bool OldChunkProc(LoadgameState *ls, int num);
00089
00090 struct OldChunks {
00091 OldChunkType type;
00092 uint32 amount;
00093
00094 void *ptr;
00095 uint offset;
00096 OldChunkProc *proc;
00097 };
00098
00099
00100 assert_compile(sizeof(TileIndex) == 4);
00101
00102 extern uint _bump_assert_value;
00103 byte ReadByte(LoadgameState *ls);
00104 bool LoadChunk(LoadgameState *ls, void *base, const OldChunks *chunks);
00105
00106 bool LoadTTDMain(LoadgameState *ls);
00107 bool LoadTTOMain(LoadgameState *ls);
00108
00109 static inline uint16 ReadUint16(LoadgameState *ls)
00110 {
00111 byte x = ReadByte(ls);
00112 return x | ReadByte(ls) << 8;
00113 }
00114
00115 static inline uint32 ReadUint32(LoadgameState *ls)
00116 {
00117 uint16 x = ReadUint16(ls);
00118 return x | ReadUint16(ls) << 16;
00119 }
00120
00121
00122
00123
00124
00125
00126
00127
00128
00129
00130 #define OCL_SVAR(type, base, offset) { type, 1, NULL, (uint)cpp_offsetof(base, offset), NULL }
00131 #define OCL_VAR(type, amount, pointer) { type, amount, pointer, 0, NULL }
00132 #define OCL_END() { OC_END, 0, NULL, 0, NULL }
00133 #define OCL_CNULL(type, amount) { OC_NULL | type, amount, NULL, 0, NULL }
00134 #define OCL_CCHUNK(type, amount, proc) { OC_CHUNK | type, amount, NULL, 0, proc }
00135 #define OCL_ASSERT(type, size) { OC_ASSERT | type, 1, NULL, size, NULL }
00136 #define OCL_NULL(amount) OCL_CNULL((OldChunkType)0, amount)
00137 #define OCL_CHUNK(amount, proc) OCL_CCHUNK((OldChunkType)0, amount, proc)
00138
00139 #endif