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(svn r18772) -Feature-ish: allow user customisable compression levels for the zlib compression

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pull/155/head
rubidium 15 years ago
parent 88c7e83e9d
commit 5d997e288d
1 changed files with 53 additions and 22 deletions
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75
src/saveload/saveload.cpp
Unescape Escape View File

@ -1295,7 +1295,7 @@ static void WriteLZO(size_t size)
if (fwrite(out, outlen + sizeof(uint32) * 2, 1, _sl.fh) != 1) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_WRITEABLE);
}
static bool InitLZO()
static bool InitLZO(byte compression)
{
_sl.bufsize = LZO_SIZE;
_sl.buf = _sl.buf_ori = MallocT<byte>(LZO_SIZE);
@ -1322,7 +1322,7 @@ static void WriteNoComp(size_t size)
if (fwrite(_sl.buf, 1, size, _sl.fh) != size) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_WRITEABLE);
}
static bool InitNoComp()
static bool InitNoComp(byte compression)
{
_sl.bufsize = LZO_SIZE;
_sl.buf = _sl.buf_ori = MallocT<byte>(LZO_SIZE);
@ -1386,7 +1386,7 @@ static bool InitMem()
static z_stream _z;
static bool InitReadZlib()
static bool InitReadZlib(byte compression)
{
memset(&_z, 0, sizeof(_z));
if (inflateInit(&_z) != Z_OK) return false;
@ -1426,10 +1426,10 @@ static void UninitReadZlib()
free(_sl.buf_ori);
}
static bool InitWriteZlib()
static bool InitWriteZlib(byte compression)
{
memset(&_z, 0, sizeof(_z));
if (deflateInit(&_z, 6) != Z_OK) return false;
if (deflateInit(&_z, compression) != Z_OK) return false;
_sl.bufsize = 4096;
_sl.buf = _sl.buf_ori = MallocT<byte>(4096);
@ -1586,29 +1586,33 @@ static void *IntToReference(size_t index, SLRefType rt)
/** The format for a reader/writer type of a savegame */
struct SaveLoadFormat {
const char *name; ///< name of the compressor/decompressor (debug-only)
uint32 tag; ///< the 4-letter tag by which it is identified in the savegame
const char *name; ///< name of the compressor/decompressor (debug-only)
uint32 tag; ///< the 4-letter tag by which it is identified in the savegame
bool (*init_read)(); ///< function executed upon initalization of the loader
ReaderProc *reader; ///< function that loads the data from the file
void (*uninit_read)(); ///< function executed when reading is finished
bool (*init_read)(byte compression); ///< function executed upon initalization of the loader
ReaderProc *reader; ///< function that loads the data from the file
void (*uninit_read)(); ///< function executed when reading is finished
bool (*init_write)(); ///< function executed upon intialization of the saver
WriterProc *writer; ///< function that saves the data to the file
void (*uninit_write)(); ///< function executed when writing is done
bool (*init_write)(byte compression); ///< function executed upon intialization of the saver
WriterProc *writer; ///< function that saves the data to the file
void (*uninit_write)(); ///< function executed when writing is done
byte min_compression; ///< the minimum compression level of this format
byte default_compression; ///< the default compression level of this format
byte max_compression; ///< the maximum compression level of this format
};
static const SaveLoadFormat _saveload_formats[] = {
#if defined(WITH_LZO)
{"lzo", TO_BE32X('OTTD'), InitLZO, ReadLZO, UninitLZO, InitLZO, WriteLZO, UninitLZO},
{"lzo", TO_BE32X('OTTD'), InitLZO, ReadLZO, UninitLZO, InitLZO, WriteLZO, UninitLZO, 0, 0, 0},
#else
{"lzo", TO_BE32X('OTTD'), NULL, NULL, NULL, NULL, NULL, NULL},
{"lzo", TO_BE32X('OTTD'), NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0},
#endif
{"none", TO_BE32X('OTTN'), InitNoComp, ReadNoComp, UninitNoComp, InitNoComp, WriteNoComp, UninitNoComp},
{"none", TO_BE32X('OTTN'), InitNoComp, ReadNoComp, UninitNoComp, InitNoComp, WriteNoComp, UninitNoComp, 0, 0, 0},
#if defined(WITH_ZLIB)
{"zlib", TO_BE32X('OTTZ'), InitReadZlib, ReadZlib, UninitReadZlib, InitWriteZlib, WriteZlib, UninitWriteZlib},
{"zlib", TO_BE32X('OTTZ'), InitReadZlib, ReadZlib, UninitReadZlib, InitWriteZlib, WriteZlib, UninitWriteZlib, 0, 6, 9},
#else
{"zlib", TO_BE32X('OTTZ'), NULL, NULL, NULL, NULL, NULL, NULL},
{"zlib", TO_BE32X('OTTZ'), NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 0},
#endif
};
@ -1616,9 +1620,10 @@ static const SaveLoadFormat _saveload_formats[] = {
* Return the savegameformat of the game. Whether it was created with ZLIB compression
* uncompressed, or another type
* @param s Name of the savegame format. If NULL it picks the first available one
* @param compression_level Output for telling what compression level we want.
* @return Pointer to SaveLoadFormat struct giving all characteristics of this type of savegame
*/
static const SaveLoadFormat *GetSavegameFormat(const char *s)
static const SaveLoadFormat *GetSavegameFormat(char *s, byte *compression_level)
{
const SaveLoadFormat *def = lastof(_saveload_formats);
@ -1626,14 +1631,39 @@ static const SaveLoadFormat *GetSavegameFormat(const char *s)
while (!def->init_write) def--;
if (!StrEmpty(s)) {
/* Get the ":..." of the compression level out of the way */
char *complevel = strrchr(s, ':');
if (complevel != NULL) *complevel = '\0';
for (const SaveLoadFormat *slf = &_saveload_formats[0]; slf != endof(_saveload_formats); slf++) {
if (slf->init_write != NULL && strcmp(s, slf->name) == 0) {
*compression_level = slf->default_compression;
if (complevel != NULL) {
/* There is a compression level in the string.
* First restore the : we removed to do proper name matching,
* then move the the begin of the actual version. */
*complevel = ':';
complevel++;
/* Get the version and determine whether all went fine. */
char *end;
long level = strtol(complevel, &end, 10);
if (end == complevel || level != Clamp(level, slf->min_compression, slf->max_compression)) {
ShowInfoF("Compression level '%s' is not valid.", complevel);
} else {
*compression_level = level;
}
}
return slf;
}
}
ShowInfoF("Savegame format '%s' is not available. Reverting to '%s'.", s, def->name);
/* Restore the string by adding the : back */
if (complevel != NULL) *complevel = ':';
}
*compression_level = def->default_compression;
return def;
}
@ -1707,13 +1737,14 @@ static SaveOrLoadResult SaveFileToDisk(bool threaded)
{
_sl.excpt_uninit = NULL;
try {
const SaveLoadFormat *fmt = GetSavegameFormat(_savegame_format);
byte compression;
const SaveLoadFormat *fmt = GetSavegameFormat(_savegame_format, &compression);
/* We have written our stuff to memory, now write it to file! */
uint32 hdr[2] = { fmt->tag, TO_BE32(SAVEGAME_VERSION << 16) };
if (fwrite(hdr, sizeof(hdr), 1, _sl.fh) != 1) SlError(STR_GAME_SAVELOAD_ERROR_FILE_NOT_WRITEABLE);
if (!fmt->init_write()) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize compressor");
if (!fmt->init_write(compression)) SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, "cannot initialize compressor");
{
uint i;
@ -1901,7 +1932,7 @@ SaveOrLoadResult SaveOrLoad(const char *filename, int mode, Subdirectory sb, boo
SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, err_str);
}
if (!fmt->init_read()) {
if (!fmt->init_read(0)) {
char err_str[64];
snprintf(err_str, lengthof(err_str), "Initializing loader '%s' failed", fmt->name);
SlError(STR_GAME_SAVELOAD_ERROR_BROKEN_INTERNAL_ERROR, err_str);

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