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-rw-r--r--src/saveload/saveload.cpp75
1 files changed, 53 insertions, 22 deletions
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index bdd8728aa..5b4637c4d 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -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);
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-17 03:19:49 +0000