00001
00002
00005 #ifndef OLDLOADER_H
00006 #define OLDLOADER_H
00007
00008 #include "saveload.h"
00009
00010 enum {
00011 BUFFER_SIZE = 4096,
00012 OLD_MAP_SIZE = 256 * 256,
00013 };
00014
00015 struct LoadgameState {
00016 FILE *file;
00017
00018 uint chunk_size;
00019
00020 bool decoding;
00021 byte decode_char;
00022
00023 uint buffer_count;
00024 uint buffer_cur;
00025 byte buffer[BUFFER_SIZE];
00026
00027 uint total_read;
00028 bool failed;
00029 };
00030
00031
00032 enum OldChunkType {
00033 OC_SIMPLE = 0,
00034 OC_NULL = 1,
00035 OC_CHUNK = 2,
00036 OC_ASSERT = 3,
00037
00038
00039 OC_TTD = 1 << 4,
00040 OC_TTO = 1 << 5,
00041
00042
00043 OC_VAR_I8 = 1 << 8,
00044 OC_VAR_U8 = 2 << 8,
00045 OC_VAR_I16 = 3 << 8,
00046 OC_VAR_U16 = 4 << 8,
00047 OC_VAR_I32 = 5 << 8,
00048 OC_VAR_U32 = 6 << 8,
00049 OC_VAR_I64 = 7 << 8,
00050 OC_VAR_U64 = 8 << 8,
00051
00052
00053 OC_FILE_I8 = 1 << 16,
00054 OC_FILE_U8 = 2 << 16,
00055 OC_FILE_I16 = 3 << 16,
00056 OC_FILE_U16 = 4 << 16,
00057 OC_FILE_I32 = 5 << 16,
00058 OC_FILE_U32 = 6 << 16,
00059
00060
00061 OC_INT8 = OC_VAR_I8 | OC_FILE_I8,
00062 OC_UINT8 = OC_VAR_U8 | OC_FILE_U8,
00063 OC_INT16 = OC_VAR_I16 | OC_FILE_I16,
00064 OC_UINT16 = OC_VAR_U16 | OC_FILE_U16,
00065 OC_INT32 = OC_VAR_I32 | OC_FILE_I32,
00066 OC_UINT32 = OC_VAR_U32 | OC_FILE_U32,
00067
00068 OC_TILE = OC_VAR_U32 | OC_FILE_U16,
00069
00074 OC_DEREFERENCE_POINTER = 1 << 31,
00075
00076 OC_END = 0
00077 };
00078
00079 DECLARE_ENUM_AS_BIT_SET(OldChunkType);
00080
00081 typedef bool OldChunkProc(LoadgameState *ls, int num);
00082
00083 struct OldChunks {
00084 OldChunkType type;
00085 uint32 amount;
00086
00087 void *ptr;
00088 uint offset;
00089 OldChunkProc *proc;
00090 };
00091
00092
00093 assert_compile(sizeof(TileIndex) == 4);
00094
00095 extern uint _bump_assert_value;
00096 byte ReadByte(LoadgameState *ls);
00097 bool LoadChunk(LoadgameState *ls, void *base, const OldChunks *chunks);
00098
00099 bool LoadTTDMain(LoadgameState *ls);
00100 bool LoadTTOMain(LoadgameState *ls);
00101
00102 static inline uint16 ReadUint16(LoadgameState *ls)
00103 {
00104 byte x = ReadByte(ls);
00105 return x | ReadByte(ls) << 8;
00106 }
00107
00108 static inline uint32 ReadUint32(LoadgameState *ls)
00109 {
00110 uint16 x = ReadUint16(ls);
00111 return x | ReadUint16(ls) << 16;
00112 }
00113
00114
00115
00116
00117
00118
00119
00120
00121
00122
00123 #define OCL_SVAR(type, base, offset) { type, 1, NULL, (uint)cpp_offsetof(base, offset), NULL }
00124 #define OCL_VAR(type, amount, pointer) { type, amount, pointer, 0, NULL }
00125 #define OCL_END() { OC_END, 0, NULL, 0, NULL }
00126 #define OCL_CNULL(type, amount) { OC_NULL | type, amount, NULL, 0, NULL }
00127 #define OCL_CCHUNK(type, amount, proc) { OC_CHUNK | type, amount, NULL, 0, proc }
00128 #define OCL_ASSERT(type, size) { OC_ASSERT | type, 1, NULL, size, NULL }
00129 #define OCL_NULL(amount) OCL_CNULL((OldChunkType)0, amount)
00130 #define OCL_CHUNK(amount, proc) OCL_CCHUNK((OldChunkType)0, amount, proc)
00131
00132 #endif