OpenTTD Source: src/saveload/oldloader.h File Reference

OpenTTD Source 14.1

Data Structures | Macros | Typedefs | Enumerations | Functions | Variables
oldloader.h File Reference
`#include "saveload.h"`
`#include "../tile_type.h"`

Go to the source code of this file.

## Data Structures
struct | LoadgameState
struct | OldChunks

## Macros
#define | OCL_SVAR(type, base, offset) { type, 1, nullptr, [] (void *b) -> void * { return std::addressof(static_cast<base *>(b)->offset); }, nullptr }
#define | OCL_VAR(type, amount, pointer) { type, amount, pointer, nullptr, nullptr }
#define | OCL_END() { OC_END, 0, nullptr, nullptr, nullptr }
#define | OCL_CNULL(type, amount) { OC_NULL | type, amount, nullptr, nullptr, nullptr }
#define | OCL_CCHUNK(type, amount, proc) { OC_CHUNK | type, amount, nullptr, nullptr, proc }
#define | OCL_ASSERT(type, size) { OC_ASSERT | type, 1, (void *)(size_t)size, nullptr, nullptr }
#define | OCL_NULL(amount) OCL_CNULL((OldChunkType)0, amount)
#define | OCL_CHUNK(amount, proc) OCL_CCHUNK((OldChunkType)0, amount, proc)

## Typedefs
typedef bool | OldChunkProc(LoadgameState *ls, int num)
typedef void * | OffsetProc(void *base)

## Enumerations
enum | OldChunkType { OC_SIMPLE = 0, OC_NULL = 1, OC_CHUNK = 2, OC_ASSERT = 3, OC_TTD = 1 << 4, OC_TTO = 1 << 5, OC_VAR_I8 = 1 << 8, OC_VAR_U8 = 2 << 8, OC_VAR_I16 = 3 << 8, OC_VAR_U16 = 4 << 8, OC_VAR_I32 = 5 << 8, OC_VAR_U32 = 6 << 8, OC_VAR_I64 = 7 << 8, OC_VAR_U64 = 8 << 8, OC_FILE_I8 = 1 << 16, OC_FILE_U8 = 2 << 16, OC_FILE_I16 = 3 << 16, OC_FILE_U16 = 4 << 16, OC_FILE_I32 = 5 << 16, OC_FILE_U32 = 6 << 16, OC_INT8 = OC_VAR_I8 | OC_FILE_I8, OC_UINT8 = OC_VAR_U8 | OC_FILE_U8, OC_INT16 = OC_VAR_I16 | OC_FILE_I16, OC_UINT16 = OC_VAR_U16 | OC_FILE_U16, OC_INT32 = OC_VAR_I32 | OC_FILE_I32, OC_UINT32 = OC_VAR_U32 | OC_FILE_U32, OC_TILE = OC_VAR_U32 | OC_FILE_U16, OC_DEREFERENCE_POINTER = 1 << 31, OC_END = 0 }

## Functions
byte | ReadByte (LoadgameState *ls)
| Reads a byte from the buffer and decompress if needed. More...
bool | LoadChunk (LoadgameState *ls, void *base, const OldChunks *chunks)
| Loads a chunk from the old savegame. More...
bool | LoadTTDMain (LoadgameState *ls)
bool | LoadTTOMain (LoadgameState *ls)
uint16_t | ReadUint16 (LoadgameState *ls)
uint32_t | ReadUint32 (LoadgameState *ls)

## Variables
static const uint | BUFFER_SIZE = 4096
static const uint | OLD_MAP_SIZE = 256
uint | _bump_assert_value

## Detailed Description

Declarations of strctures and function used in loader of old savegames

Definition in file oldloader.h.

## Enumeration Type Documentation

## ◆ OldChunkType

enum OldChunkType

Enumerator
OC_TTD | chunk is valid ONLY for TTD savegames
OC_TTO | -//- TTO (default is neither of these)
OC_DEREFERENCE_POINTER | Dereference the pointer once before writing to it, so we do not have to use big static arrays.
OC_END | End of the whole chunk, all 32 bits set to zero.

Definition at line 35 of file oldloader.h.

## Function Documentation

## ◆ LoadChunk()

bool LoadChunk | ( | LoadgameState * | ls,
|  | void * | base,
|  | const OldChunks * | chunks
| ) |  |

Loads a chunk from the old savegame.

Definition at line 110 of file oldloader.cpp.

References _savegame_type, OC_DEREFERENCE_POINTER, OC_END, OC_TTD, OC_TTO, SGT_TTO, and OldChunks::type.

## ◆ ReadByte()

byte ReadByte | ( | LoadgameState * | ls | ) |

Reads a byte from the buffer and decompress if needed.

Definition at line 76 of file oldloader.cpp.

References ReadByteFromFile().