add 7z support, code cleanup

Makefile.gc

@@ -20,7 +20,7 @@ include $(DEVKITPPC)/gamecube_rules
 TARGET		:=	snes9xgx-$(VERSION)-gc
 TARGETDIR   :=  executables
 BUILD		:=	build_gc
-SOURCES		:=	source/snes9x source/ngc
+SOURCES		:=	source/snes9x source/ngc source/sz
 DATA		:=	data  
 INCLUDES	:=	source/snes9x source/ngc
 
@@ -34,6 +34,7 @@ CFLAGS	=	-g -O3 -Wall $(MACHDEP) $(INCLUDE) \
 			-DCPU_SHUTDOWN -DSPC700_SHUTDOWN \
 			-DSPC700_C -DSDD1_DECOMP \
 			-DCORRECT_VRAM_READS -DNEW_COLOUR_BLENDING \
+			-D_SZ_ONE_DIRECTORY -D_LZMA_IN_CB -D_LZMA_OUT_READ \
 			-fomit-frame-pointer -fno-exceptions -Wno-unused-parameter \
 			#-D_DEBUG_VIDEO -pipe
 CXXFLAGS	=	$(CFLAGS)

Makefile.wii

@@ -20,7 +20,7 @@ include $(DEVKITPPC)/wii_rules
 TARGET		:=	snes9xgx-$(VERSION)-wii
 TARGETDIR   :=  executables
 BUILD		:=	build_wii
-SOURCES		:=	source/snes9x source/ngc
+SOURCES		:=	source/snes9x source/ngc source/sz
 DATA		:=	data  
 INCLUDES	:=	source/snes9x source/ngc
 
@@ -34,6 +34,7 @@ CFLAGS	=	-g -O3 -Wall $(MACHDEP) $(INCLUDE) \
 			-DCPU_SHUTDOWN -DSPC700_SHUTDOWN \
 			-DSPC700_C -DSDD1_DECOMP \
 			-DCORRECT_VRAM_READS -DNEW_COLOUR_BLENDING \
+			-D_SZ_ONE_DIRECTORY -D_LZMA_IN_CB -D_LZMA_OUT_READ \
 			-fomit-frame-pointer -fno-exceptions -Wno-unused-parameter \
 			#-D_DEBUG_VIDEO -pipe
 CXXFLAGS	=	-save-temps -Xassembler -aln=$@.lst $(CFLAGS)

source/ngc/dvd.cpp

@@ -28,9 +28,9 @@ extern "C" {
 #include "snes9xGX.h"
 #include "unzip.h"
 
-u64 dvddir = 0;
+u64 dvddir = 0; // offset of currently selected file or folder
-u64 dvdrootdir = 0;
+int dvddirlength = 0; // length of currently selected file or folder
-int dvddirlength = 0;
+u64 dvdrootdir = 0; // offset of DVD root
 bool isWii = false;
 
 #ifdef HW_DOL
@@ -89,6 +89,135 @@ dvd_read (void *dst, unsigned int len, u64 offset)
 	return 0;
 }
 
+/****************************************************************************
+ * dvd_buffered_read
+ *
+ * the GC's dvd drive only supports offsets and length which are a multiple
+ * of 32 bytes additionally the max length of a read is 2048 bytes
+ * this function removes these limitations
+ * additionally the 7zip SDK does often read data in 1 byte parts from the
+ * DVD even when it could read 32 bytes. the dvdsf_buffer has been added to
+ * avoid having to read the same sector over and over again
+ ***************************************************************************/
+
+#define DVD_LENGTH_MULTIPLY 32
+#define DVD_OFFSET_MULTIPLY 32
+#define DVD_MAX_READ_LENGTH 2048
+#define DVD_SECTOR_SIZE 2048
+
+unsigned char dvdsf_buffer[DVD_SECTOR_SIZE];
+u64 dvdsf_last_offset = 0;
+u64 dvdsf_last_length = 0;
+
+int dvd_buffered_read(void *dst, u32 len, u64 offset)
+{
+    int ret = 0;
+
+    // only read data if the data inside dvdsf_buffer cannot be used
+    if(offset != dvdsf_last_offset || len > dvdsf_last_length)
+    {
+        memset(&dvdsf_buffer, '\0', DVD_SECTOR_SIZE);
+        ret = dvd_read(&dvdsf_buffer, len, offset);
+        dvdsf_last_offset = offset;
+        dvdsf_last_length = len;
+    }
+
+    memcpy(dst, &dvdsf_buffer, len);
+    return ret;
+}
+
+int dvd_safe_read(void *dst_v, u32 len, u64 offset)
+{
+    unsigned char buffer[DVD_SECTOR_SIZE]; // buffer for one dvd sector
+
+    // if read size and length are a multiply of DVD_(OFFSET,LENGTH)_MULTIPLY and length < DVD_MAX_READ_LENGTH
+    // we don't need to fix anything
+    if(len % DVD_LENGTH_MULTIPLY == 0 && offset % DVD_OFFSET_MULTIPLY == 0 && len <= DVD_MAX_READ_LENGTH)
+    {
+        int ret = dvd_buffered_read(buffer, len, offset);
+        memcpy(dst_v, &buffer, len);
+        return ret;
+    }
+    else
+    {
+        // no errors yet -> ret = 0
+        // the return value of dvd_read will be OR'd with ret
+        // because dvd_read does return 1 on error and 0 on success and
+        // because 0 | 1 = 1 ret will also contain 1 if at least one error
+        // occured and 0 otherwise ;)
+        int ret = 0; // return value of dvd_read
+
+        // we might need to fix all 3 issues
+        unsigned char *dst = (unsigned char *)dst_v; // gcc will not allow to use var[num] on void* types
+        u64 bytesToRead; // the number of bytes we still need to read & copy to the output buffer
+        u64 currentOffset; // the current dvd offset
+        u64 bufferOffset; // the current buffer offset
+        u64 i, j, k; // temporary variables which might be used for different stuff
+        //	unsigned char buffer[DVD_SECTOR_SIZE]; // buffer for one dvd sector
+
+        currentOffset = offset;
+        bytesToRead = len;
+        bufferOffset = 0;
+
+        // fix first issue (offset is not a multiply of 32)
+        if(offset % DVD_OFFSET_MULTIPLY)
+        {
+            // calculate offset of the prior 32 byte position
+            i = currentOffset - (currentOffset % DVD_OFFSET_MULTIPLY);
+
+            // calculate the offset from which the data of the dvd buffer will be copied
+            j = currentOffset % DVD_OFFSET_MULTIPLY;
+
+            // calculate the number of bytes needed to reach the next DVD_OFFSET_MULTIPLY byte mark
+            k = DVD_OFFSET_MULTIPLY - j;
+
+            // maybe we'll only need to copy a few bytes and we therefore don't even reach the next sector
+            if(k > len)
+            {
+                k = len;
+            }
+
+            // read 32 bytes from the last 32 byte position
+            ret |= dvd_buffered_read(buffer, DVD_OFFSET_MULTIPLY, i);
+
+            // copy the bytes to the output buffer and update currentOffset, bufferOffset and bytesToRead
+            memcpy(&dst[bufferOffset], &buffer[j], k);
+            currentOffset += k;
+            bufferOffset += k;
+            bytesToRead -= k;
+        }
+
+        // fix second issue (more than 2048 bytes are needed)
+        if(bytesToRead > DVD_MAX_READ_LENGTH)
+        {
+            // calculate the number of 2048 bytes sector needed to get all data
+            i = (bytesToRead - (bytesToRead % DVD_MAX_READ_LENGTH)) / DVD_MAX_READ_LENGTH;
+
+            // read data in 2048 byte sector
+            for(j = 0; j < i; j++)
+            {
+                ret |= dvd_buffered_read(buffer, DVD_MAX_READ_LENGTH, currentOffset); // read sector
+                memcpy(&dst[bufferOffset], buffer, DVD_MAX_READ_LENGTH); // copy to output buffer
+
+                // update currentOffset, bufferOffset and bytesToRead
+                currentOffset += DVD_MAX_READ_LENGTH;
+                bufferOffset += DVD_MAX_READ_LENGTH;
+                bytesToRead -= DVD_MAX_READ_LENGTH;
+            }
+        }
+
+        // fix third issue (length is not a multiply of 32)
+        if(bytesToRead)
+        {
+            ret |= dvd_buffered_read(buffer, DVD_MAX_READ_LENGTH, currentOffset); // read 32 byte from the dvd
+            memcpy(&dst[bufferOffset], buffer, bytesToRead); // copy bytes to output buffer
+        }
+
+        //free(tmp);
+        return ret;
+    }
+}
+
 /** Minimal ISO Directory Definition **/
 #define RECLEN 0		/* Record length */
 #define EXTENT 6		/* Extent */
@@ -440,6 +569,9 @@ LoadDVDFile (unsigned char *buffer, int length)
 	u64 discoffset;
 	char readbuffer[2048];
 
+	dvddir = filelist[selection].offset;
+	dvddirlength = filelist[selection].length;
+
 	// How many 2k blocks to read
 	blocks = dvddirlength / 2048;
 	offset = 0;
@@ -474,7 +606,7 @@ LoadDVDFile (unsigned char *buffer, int length)
 		}
 		else
 		{
-			return UnZipFile (buffer, discoffset);	// unzip from dvd
+			return UnZipBuffer (buffer, METHOD_DVD); // unzip from dvd
 		}
 	}
 	return dvddirlength;

source/ngc/dvd.h

@@ -18,10 +18,14 @@ int ParseDVDdirectory ();
 int LoadDVDFile (unsigned char *buffer, int length);
 bool TestDVD();
 int dvd_read (void *dst, unsigned int len, u64 offset);
+int dvd_safe_read (void *dst, unsigned int len, u64 offset);
 bool SwitchDVDFolder(char dir[]);
 void SetDVDDriveType();
 #ifdef HW_DOL
 void dvd_motor_off ();
 #endif
 
+extern u64 dvddir;
+extern int dvddirlength;
+
 #endif

source/ngc/fileop.cpp

@@ -3,7 +3,7 @@
  *
  * softdev July 2006
  * crunchy2 May 2007
-  * Michniewski 2008
+ * Michniewski 2008
  * Tantric August 2008
  *
  * fileop.cpp
@@ -27,7 +27,8 @@
 #include "preferences.h"
 #include "snes9xGX.h"
 
-FILE * filehandle;
+// FAT file pointer - the only one we should ever use!
+FILE * fatfile;
 
 /****************************************************************************
  * fat_is_mounted
@@ -172,45 +173,65 @@ LoadFATFile (char * rbuffer, int length)
 {
 	char zipbuffer[2048];
 	char filepath[MAXPATHLEN];
-	FILE *handle;
 	u32 size;
 
 	/* Check filename length */
-	if ((strlen(currentdir)+1+strlen(filelist[selection].filename)) < MAXPATHLEN)
+	if (!MakeROMPath(filepath, METHOD_SD))
-		sprintf(filepath, "%s/%s",currentdir,filelist[selection].filename);
-	else
 	{
 		WaitPrompt((char*) "Maximum filepath length reached!");
 		return -1;
 	}
 
-	handle = fopen (filepath, "rb");
+	fatfile = fopen (filepath, "rb");
-	if (handle > 0)
+	if (fatfile > 0)
 	{
 		if(length > 0) // do a partial read (eg: to check file header)
 		{
-			fread (rbuffer, 1, length, handle);
+			fread (rbuffer, 1, length, fatfile);
 			size = length;
 		}
 		else // load whole file
 		{
-			fread (zipbuffer, 1, 2048, handle);
+			fread (zipbuffer, 1, 2048, fatfile);
 
 			if (IsZipFile (zipbuffer))
 			{
-				size = UnZipFile ((unsigned char *)rbuffer, handle);	// unzip from FAT
+				size = UnZipBuffer ((unsigned char *)rbuffer, METHOD_SD);	// unzip from FAT
 			}
 			else
 			{
 				// Just load the file up
-				fseek(handle, 0, SEEK_END);
+				fseek(fatfile, 0, SEEK_END);
-				size = ftell(handle);				// get filesize
+				size = ftell(fatfile);				// get filesize
-				fseek(handle, 2048, SEEK_SET);		// seek back to point where we left off
+				fseek(fatfile, 2048, SEEK_SET);		// seek back to point where we left off
 				memcpy (rbuffer, zipbuffer, 2048);	// copy what we already read
-				fread (rbuffer + 2048, 1, size - 2048, handle);
+				fread (rbuffer + 2048, 1, size - 2048, fatfile);
 			}
 		}
-		fclose (handle);
+		fclose (fatfile);
+		return size;
+	}
+	else
+	{
+		WaitPrompt((char*) "Error opening file");
+		return 0;
+	}
+}
+
+/****************************************************************************
+ * LoadFATSzFile
+ * Loads the selected file # from the specified 7z into rbuffer
+ * Returns file size
+ ***************************************************************************/
+int
+LoadFATSzFile(char * filepath, unsigned char * rbuffer)
+{
+	u32 size;
+	fatfile = fopen (filepath, "rb");
+	if (fatfile > 0)
+	{
+		size = SzExtractFile(filelist[selection].offset, rbuffer);
+		fclose (fatfile);
 		return size;
 	}
 	else
@@ -226,12 +247,11 @@ LoadFATFile (char * rbuffer, int length)
 int
 LoadBufferFromFAT (char *filepath, bool silent)
 {
-	FILE *handle;
     int size = 0;
 
-    handle = fopen (filepath, "rb");
+    fatfile = fopen (filepath, "rb");
 
-    if (handle <= 0)
+    if (fatfile <= 0)
     {
         if ( !silent )
         {
@@ -243,13 +263,11 @@ LoadBufferFromFAT (char *filepath, bool silent)
     }
 
     // Just load the file up
-	fseek(handle, 0, SEEK_END); // go to end of file
+	fseek(fatfile, 0, SEEK_END); // go to end of file
-	size = ftell(handle); // get filesize
+	size = ftell(fatfile); // get filesize
-	fseek(handle, 0, SEEK_SET); // go to start of file
+	fseek(fatfile, 0, SEEK_SET); // go to start of file
-	fread (savebuffer, 1, size, handle);
+	fread (savebuffer, 1, size, fatfile);
-	fclose (handle);
+	fclose (fatfile);
-
-    fclose (handle);
 
     return size;
 }
@@ -260,13 +278,11 @@ LoadBufferFromFAT (char *filepath, bool silent)
 int
 SaveBufferToFAT (char *filepath, int datasize, bool silent)
 {
-	FILE *handle;
+	if (datasize)
-
-    if (datasize)
     {
-        handle = fopen (filepath, "wb");
+        fatfile = fopen (filepath, "wb");
 
-        if (handle <= 0)
+        if (fatfile <= 0)
         {
             char msg[100];
             sprintf(msg, "Couldn't save %s", filepath);
@@ -274,8 +290,8 @@ SaveBufferToFAT (char *filepath, int datasize, bool silent)
             return 0;
         }
 
-        fwrite (savebuffer, 1, datasize, handle);
+        fwrite (savebuffer, 1, datasize, fatfile);
-        fclose (handle);
+        fclose (fatfile);
     }
     return datasize;
 }

source/ngc/fileop.h

@@ -27,9 +27,11 @@
 bool ChangeFATInterface(int method, bool silent);
 int ParseFATdirectory(int method);
 int LoadFATFile (char * fbuffer, int length);
+int LoadFATSzFile(char * filepath, unsigned char * rbuffer);
 int SaveBufferToFAT (char *filepath, int datasize, bool silent);
 int LoadBufferFromFAT (char *filepath, bool silent);
 
 extern char currFATdir[MAXPATHLEN];
+extern FILE * fatfile;
 
 #endif

source/ngc/filesel.cpp

@@ -43,6 +43,7 @@ extern "C" {
 int offset;
 int selection;
 char currentdir[MAXPATHLEN];
+char szpath[MAXPATHLEN];
 int maxfiles;
 extern int screenheight;
 unsigned long SNESROMSize = 0;
@@ -53,6 +54,7 @@ extern int dvddirlength;
 
 // Global file entry table
 FILEENTRIES filelist[MAXFILES];
+bool inSz = false;
 
 unsigned char *savebuffer = NULL;
 
@@ -192,6 +194,28 @@ int UpdateDirName(int method)
 	}
 }
 
+bool MakeROMPath(char filepath[], int method)
+{
+	char temppath[MAXPATHLEN];
+
+	// Check filename length
+	if ((strlen(currentdir)+1+strlen(filelist[selection].filename)) < MAXPATHLEN)
+	{
+		sprintf(temppath, "%s/%s",currentdir,filelist[selection].filename);
+
+		if(method == METHOD_SMB)
+			strcpy(filepath, SMBPath(temppath));
+		else
+			strcpy(filepath, temppath);
+		return true;
+	}
+	else
+	{
+		filepath[0] = 0;
+		return false;
+	}
+}
+
 /****************************************************************************
  * FileSortCallback
  *
@@ -244,12 +268,14 @@ bool IsValidROM(int method)
 
 		if (p != NULL)
 		{
-			if(stricmp(p, ".zip") == 0)
+			if(stricmp(p, ".zip") == 0 && !inSz)
 			{
 				// we need to check the file extension of the first file in the archive
 				char * zippedFilename = GetFirstZipFilename (method);
 
-				if(strlen(zippedFilename) > 4)
+				if(zippedFilename == NULL) // we don't want to run strlen on NULL
+					p = NULL;
+				else if(strlen(zippedFilename) > 4)
 					p = strrchr(zippedFilename, '.');
 				else
 					p = NULL;
@@ -268,6 +294,25 @@ bool IsValidROM(int method)
 	return false;
 }
 
+/****************************************************************************
+ * IsSz
+ *
+ * Checks if the specified file is a 7z
+ ***************************************************************************/
+
+bool IsSz()
+{
+	if (strlen(filelist[selection].filename) > 4)
+	{
+		char * p = strrchr(filelist[selection].filename, '.');
+
+		if (p != NULL)
+			if(stricmp(p, ".7z") == 0)
+				return true;
+	}
+	return false;
+}
+
 /****************************************************************************
  * StripExt
  *
@@ -342,7 +387,24 @@ int FileSelector (int method)
 			if (filelist[selection].flags) // This is directory
 			{
 				/* update current directory and set new entry list if directory has changed */
-				int status = UpdateDirName(method);
+				int status;
+
+				if(inSz && selection == 0) // inside a 7z, requesting to leave
+				{
+					if(method == METHOD_DVD)
+					{
+						dvddir = filelist[0].offset;
+						dvddirlength = filelist[0].length;
+					}
+					inSz = false;
+					status = 1;
+					SzClose();
+				}
+				else
+				{
+					status = UpdateDirName(method);
+				}
+
 				if (status == 1) // ok, open directory
 				{
 					switch (method)
@@ -363,8 +425,8 @@ int FileSelector (int method)
 
 					if (!maxfiles)
 					{
-						WaitPrompt ((char*) "Error reading directory!");
+						WaitPrompt ((char*) "Error reading directory !");
-						return 0; // quit menu
+						haverom = 1; // quit menu
 					}
 				}
 				else if (status == -1)	// directory name too long
@@ -374,43 +436,69 @@ int FileSelector (int method)
 			}
 			else	// this is a file
 			{
-				// check that this is a valid ROM
+				// 7z file - let's open it up to select a file inside
-				if(!IsValidROM(method))
+				if(IsSz())
-					return 0;
-
-				// store the filename (w/o ext) - used for sram/freeze naming
-				StripExt(Memory.ROMFilename, filelist[selection].filename);
-
-				ShowAction ((char *)"Loading...");
-
-				switch (method)
 				{
-					case METHOD_SD:
+					// we'll store the 7z filepath for extraction later
-					case METHOD_USB:
+					if(!MakeROMPath(szpath, method))
-					SNESROMSize = LoadFATFile ((char *)Memory.ROM, 0);
+					{
-					break;
+						WaitPrompt((char*) "Maximum filepath length reached!");
-
+						return -1;
-					case METHOD_DVD:
+					}
-					dvddir = filelist[selection].offset;
+					maxfiles = SzParse(szpath, method);
-					dvddirlength = filelist[selection].length;
+					if(maxfiles)
-					SNESROMSize = LoadDVDFile (Memory.ROM, 0);
+						inSz = true;
-					break;
-
-					case METHOD_SMB:
-					SNESROMSize = LoadSMBFile ((char *)Memory.ROM, 0);
-					break;
-				}
-
-				if (SNESROMSize > 0)
-				{
-					Memory.LoadROM ("BLANK.SMC");
-					Memory.LoadSRAM ("BLANK");
-					haverom = 1;
-					return 1;
 				}
 				else
 				{
-					WaitPrompt((char*) "Error loading ROM!");
+					// check that this is a valid ROM
+					if(!IsValidROM(method))
+						return 0;
+
+					// store the filename (w/o ext) - used for sram/freeze naming
+					StripExt(Memory.ROMFilename, filelist[selection].filename);
+
+					ShowAction ((char *)"Loading...");
+
+					SNESROMSize = 0;
+
+					switch (method)
+					{
+						case METHOD_SD:
+						case METHOD_USB:
+							if(inSz)
+								SNESROMSize = LoadFATSzFile(szpath, (unsigned char *)Memory.ROM);
+							else
+								SNESROMSize = LoadFATFile ((char *)Memory.ROM, 0);
+						break;
+
+						case METHOD_DVD:
+							if(inSz)
+								SNESROMSize = SzExtractFile(filelist[selection].offset, (unsigned char *)Memory.ROM);
+							else
+								SNESROMSize = LoadDVDFile (Memory.ROM, 0);
+						break;
+
+						case METHOD_SMB:
+							if(inSz)
+								SNESROMSize = LoadSMBSzFile(szpath,  (unsigned char *)Memory.ROM);
+							else
+								SNESROMSize = LoadSMBFile ((char *)Memory.ROM, 0);
+						break;
+					}
+					inSz = false;
+
+					if (SNESROMSize > 0)
+					{
+						Memory.LoadROM ("BLANK.SMC");
+						Memory.LoadSRAM ("BLANK");
+						haverom = 1;
+						return 1;
+					}
+					else
+					{
+						WaitPrompt((char*) "Error loading ROM!");
+					}
 				}
 			}
 			redraw = 1;

source/ngc/filesel.h

@@ -40,6 +40,7 @@ extern unsigned long SNESROMSize;
 
 void AllocSaveBuffer();
 void FreeSaveBuffer();
+bool MakeROMPath(char filepath[], int method);
 int OpenROM (int method);
 int autoLoadMethod();
 int autoSaveMethod();

source/ngc/s9xconfig.cpp

@@ -96,7 +96,7 @@ DefaultSettings ()
 	// Graphics
 	Settings.Transparency = true;
 	Settings.SupportHiRes = true;
-	Settings.SkipFrames = 10;
+	Settings.SkipFrames = AUTO_FRAMERATE;
 	Settings.TurboSkipFrames = 19;
 	Settings.DisplayFrameRate = false;
 	Settings.AutoDisplayMessages = 0;

source/ngc/smbop.cpp

@@ -32,7 +32,10 @@ bool networkShareInit = false;
 unsigned int SMBTimer = 0;
 #define SMBTIMEOUT ( 3600 ) // Some implementations timeout in 10 minutes
 
+// SMB connection/file handles - the only ones we should ever use!
 SMBCONN smbconn;
+SMBFILE smbfile;
+
 #define ZIPCHUNK 16384
 
 /****************************************************************************
@@ -212,6 +215,15 @@ ParseSMBdirectory ()
 	return filecount;
 }
 
+/****************************************************************************
+ * Open SMB file
+ ***************************************************************************/
+
+SMBFILE OpenSMBFile(char * filepath)
+{
+	return SMB_OpenFile (SMBPath(filepath), SMB_OPEN_READING, SMB_OF_OPEN, smbconn);
+}
+
 /****************************************************************************
  * Load SMB file
  * rom - pointer to memory where ROM will be stored
@@ -223,14 +235,38 @@ LoadSMBFile (char * rom, int length)
 	char filepath[MAXPATHLEN];
 
 	/* Check filename length */
-	if ((strlen(currentdir)+1+strlen(filelist[selection].filename)) < MAXPATHLEN)
+	if (!MakeROMPath(filepath, METHOD_SMB))
-		sprintf(filepath, "%s/%s",currentdir,filelist[selection].filename);
-	else
 	{
 		WaitPrompt((char*) "Maximum filepath length reached!");
 		return -1;
 	}
-	return LoadBufferFromSMB(rom, SMBPath(filepath), length, NOTSILENT);
+	return LoadBufferFromSMB(rom, filepath, length, NOTSILENT);
+}
+
+/****************************************************************************
+ * LoadSMBSzFile
+ * Loads the selected file # from the specified 7z into rbuffer
+ * Returns file size
+ ***************************************************************************/
+int
+LoadSMBSzFile(char * filepath, unsigned char * rbuffer)
+{
+	if(!ConnectShare (NOTSILENT))
+		return 0;
+
+	smbfile = OpenSMBFile(filepath);
+
+	if (smbfile)
+	{
+		u32 size = SzExtractFile(filelist[selection].offset, rbuffer);
+		SMB_CloseFile (smbfile);
+		return size;
+	}
+	else
+	{
+		WaitPrompt((char*) "Error opening file");
+		return 0;
+	}
 }
 
 /****************************************************************************
@@ -249,7 +285,6 @@ SaveBufferToSMB (char * sbuffer, char *filepath, int datasize, bool silent)
 	if(!ConnectShare (NOTSILENT))
 		return 0;
 
-	SMBFILE smbfile;
 	int dsize = datasize;
 	int wrote = 0;
 	int boffset = 0;
@@ -301,12 +336,10 @@ LoadBufferFromSMB (char * sbuffer, char *filepath, int length, bool silent)
 	if(!ConnectShare (NOTSILENT))
 		return 0;
 
-	SMBFILE smbfile;
 	int ret;
 	int boffset = 0;
 
-	smbfile =
+	smbfile = OpenSMBFile(filepath);
-	SMB_OpenFile (SMBPath(filepath), SMB_OPEN_READING, SMB_OF_OPEN, smbconn);
 
 	if (!smbfile)
 	{
@@ -329,7 +362,7 @@ LoadBufferFromSMB (char * sbuffer, char *filepath, int length, bool silent)
 
 		if (IsZipFile (sbuffer))
 		{
-			boffset = UnZipFile ((unsigned char *)sbuffer, smbfile); // unzip from SMB
+			boffset = UnZipBuffer ((unsigned char *)sbuffer, METHOD_SMB); // unzip from SMB
 		}
 		else
 		{

source/ngc/smbop.h

@@ -14,14 +14,21 @@
 
 #define _NGCSMB_
 
+#include <smb.h>
+
 bool InitializeNetwork(bool silent);
 bool ConnectShare (bool silent);
 char * SMBPath(char * path);
 int UpdateSMBdirname();
 int ParseSMBdirectory ();
+SMBFILE OpenSMBFile(char * filepath);
 int LoadSMBFile (char * fbuffer, int length);
+int LoadSMBSzFile(char * filepath, unsigned char * rbuffer);
 int LoadBufferFromSMB (char *filepath, bool silent);
 int LoadBufferFromSMB (char * sbuffer, char *filepath, int length, bool silent);
 int SaveBufferToSMB (char *filepath, int datasize, bool silent);
 int SaveBufferToSMB (char * sbuffer, char *filepath, int datasize, bool silent);
+
+extern SMBFILE smbfile;
+
 #endif

source/ngc/snes9xGX.cpp

@@ -204,7 +204,6 @@ main ()
 	DI_Init();	// first
 #endif
 
-	unsigned int save_flags;
 	int selectedMenu = -1;
 
 	// Initialise video
@@ -325,10 +324,6 @@ main ()
 		MainMenu (selectedMenu);
 	}
 
-	// Load ROM
-	save_flags = CPU.Flags;
-	CPU.Flags = save_flags;
-
 	// Emulate
 	emulate ();
 

source/ngc/unzip.cpp

@@ -16,6 +16,12 @@
 #include <string.h>
 #include <zlib.h>
 
+extern "C" {
+#include "../sz/7zCrc.h"
+#include "../sz/7zIn.h"
+#include "../sz/7zExtract.h"
+}
+
 #include "snes9xGX.h"
 #include "dvd.h"
 #include "smbop.h"
@@ -77,17 +83,14 @@ IsZipFile (char *buffer)
 	return 0;
 }
 
- /*****************************************************************************
+/*****************************************************************************
- * unzip
+* UnZipBuffer
- *
+*
- * It should be noted that there is a limit of 5MB total size for any ROM
+* It should be noted that there is a limit of 5MB total size for any ROM
- ******************************************************************************/
+******************************************************************************/
-FILE* fatfile; // FAT
-u64 discoffset; // DVD
-SMBFILE smbfile; // SMB
 
 int
-UnZipBuffer (unsigned char *outbuffer, short where)
+UnZipBuffer (unsigned char *outbuffer, int method)
 {
 	PKZIPHEADER pkzip;
 	int zipoffset = 0;
@@ -100,22 +103,25 @@ UnZipBuffer (unsigned char *outbuffer, short where)
 	int have = 0;
 	char readbuffer[ZIPCHUNK];
 	char msg[128];
+	u64 discoffset = 0;
 
-	/*** Read Zip Header ***/
+	// Read Zip Header
-	switch (where)
+	switch (method)
 	{
-		case 0:	// SD Card
+		case METHOD_SD:
-		fseek(fatfile, 0, SEEK_SET);
+		case METHOD_USB:
-		fread (readbuffer, 1, ZIPCHUNK, fatfile);
+			fseek(fatfile, 0, SEEK_SET);
-		break;
+			fread (readbuffer, 1, ZIPCHUNK, fatfile);
+			break;
 
-		case 1: // DVD
+		case METHOD_DVD:
-		dvd_read (readbuffer, ZIPCHUNK, discoffset);
+			discoffset = dvddir;
-		break;
+			dvd_read (readbuffer, ZIPCHUNK, discoffset);
+			break;
 
-		case 2: // From SMB
+		case METHOD_SMB:
-		SMB_ReadFile(readbuffer, ZIPCHUNK, 0, smbfile);
+			SMB_ReadFile(readbuffer, ZIPCHUNK, 0, smbfile);
-		break;
+			break;
 	}
 
 	/*** Copy PKZip header to local, used as info ***/
@@ -175,25 +181,26 @@ UnZipBuffer (unsigned char *outbuffer, short where)
 		}
 		while (zs.avail_out == 0);
 
-		/*** Readup the next 2k block ***/
+		// Readup the next 2k block
 		zipoffset = 0;
 		zipchunk = ZIPCHUNK;
 
-		switch (where)
+		switch (method)
 		{
-			case 0:	// SD Card
+			case METHOD_SD:
-			fread (readbuffer, 1, ZIPCHUNK, fatfile);
+			case METHOD_USB:
-			break;
+				fread (readbuffer, 1, ZIPCHUNK, fatfile);
+				break;
 
-			case 1:	// DVD
+			case METHOD_DVD:
-			readoffset += ZIPCHUNK;
+				readoffset += ZIPCHUNK;
-			dvd_read (readbuffer, ZIPCHUNK, discoffset+readoffset);
+				dvd_read (readbuffer, ZIPCHUNK, discoffset+readoffset);
-			break;
+				break;
 
-			case 2: // From SMB
+			case METHOD_SMB:
-			readoffset += ZIPCHUNK;
+				readoffset += ZIPCHUNK;
-			SMB_ReadFile(readbuffer, ZIPCHUNK, readoffset, smbfile);
+				SMB_ReadFile(readbuffer, ZIPCHUNK, readoffset, smbfile);
-			break;
+				break;
 		}
 	}
 	while (res != Z_STREAM_END);
@@ -210,62 +217,345 @@ UnZipBuffer (unsigned char *outbuffer, short where)
 
 	return 0;
 }
-// Reading from FAT
-int
-UnZipFile (unsigned char *outbuffer, FILE* infile)
-{
-	fatfile = infile;
-	return UnZipBuffer(outbuffer, 0);
-}
-// Reading from DVD
-int
-UnZipFile (unsigned char *outbuffer, u64 inoffset)
-{
-	discoffset = inoffset;
-	return UnZipBuffer(outbuffer, 1);
-}
-// Reading from SMB
-int
-UnZipFile (unsigned char *outbuffer, SMBFILE infile)
-{
-	smbfile = infile;
-	return UnZipBuffer(outbuffer, 2);
-}
 
 /****************************************************************************
- * GetFirstZipFilename
+* GetFirstZipFilename
- *
+*
- * Returns the filename of the first file in the zipped archive
+* Returns the filename of the first file in the zipped archive
- * The idea here is to do the least amount of work required
+* The idea here is to do the least amount of work required
- ***************************************************************************/
+***************************************************************************/
 
 char *
 GetFirstZipFilename (int method)
 {
-	char testbuffer[ZIPCHUNK];
+	char * firstFilename = NULL;
+	char tempbuffer[ZIPCHUNK];
 
 	// read start of ZIP
 	switch (method)
 	{
 		case METHOD_SD:	// SD Card
 		case METHOD_USB: // USB
-		LoadFATFile (testbuffer, ZIPCHUNK);
+			LoadFATFile (tempbuffer, ZIPCHUNK);
-		break;
+			break;
 
 		case METHOD_DVD: // DVD
-		LoadDVDFile ((unsigned char *)testbuffer, ZIPCHUNK);
+			LoadDVDFile ((unsigned char *)tempbuffer, ZIPCHUNK);
-		break;
+			break;
 
 		case METHOD_SMB: // From SMB
-		LoadSMBFile (testbuffer, ZIPCHUNK);
+			LoadSMBFile (tempbuffer, ZIPCHUNK);
-		break;
+			break;
 	}
 
-	testbuffer[28] = 0; // truncate - filename length is 2 bytes long (bytes 26-27)
+	tempbuffer[28] = 0; // truncate - filename length is 2 bytes long (bytes 26-27)
-	int namelength = testbuffer[26]; // filename length starts 26 bytes in
+	int namelength = tempbuffer[26]; // filename length starts 26 bytes in
 
-	char * firstFilename = &testbuffer[30]; // first filename of a ZIP starts 31 bytes in
+	firstFilename = &tempbuffer[30]; // first filename of a ZIP starts 31 bytes in
 	firstFilename[namelength] = 0; // truncate at filename length
 
 	return firstFilename;
 }
+
+/****************************************************************************
+* 7z functions
+***************************************************************************/
+
+typedef struct _SzFileInStream
+{
+   ISzInStream InStream;
+   u64 offset; // offset of the file
+   unsigned int len; // length of the file
+   u64 pos;  // current position of the file pointer
+} SzFileInStream;
+
+// 7zip error list
+char szerrormsg[][30] = {
+   "7z: Data error",
+   "7z: Out of memory",
+   "7z: CRC Error",
+   "7z: Not implemented",
+   "7z: Fail",
+   "7z: Archive error",
+   "7z: Dictionary too large",
+};
+
+SZ_RESULT SzRes;
+
+SzFileInStream SzArchiveStream;
+CArchiveDatabaseEx SzDb;
+ISzAlloc SzAllocImp;
+ISzAlloc SzAllocTempImp;
+UInt32 SzBlockIndex = 0xFFFFFFFF;
+size_t SzBufferSize;
+size_t SzOffset;
+size_t SzOutSizeProcessed;
+CFileItem *SzF;
+
+char sz_buffer[2048];
+int szMethod = 0;
+
+/****************************************************************************
+* Is7ZipFile
+*
+* Returns 1 when 7z signature is found
+****************************************************************************/
+int
+Is7ZipFile (char *buffer)
+{
+	unsigned int *check;
+	check = (unsigned int *) buffer;
+
+	// 7z signature
+	static Byte Signature[6] = {'7', 'z', 0xBC, 0xAF, 0x27, 0x1C};
+
+	int i;
+	for(i = 0; i < 6; i++)
+		if(buffer[i] != Signature[i])
+			return 0;
+
+	return 1; // 7z archive found
+}
+
+// display an error message
+void SzDisplayError(SZ_RESULT res)
+{
+	WaitPrompt(szerrormsg[(res - 1)]);
+}
+
+// function used by the 7zip SDK to read data from SD/USB/DVD/SMB
+SZ_RESULT SzFileReadImp(void *object, void **buffer, size_t maxRequiredSize, size_t *processedSize)
+{
+   // the void* object is a SzFileInStream
+   SzFileInStream *s = (SzFileInStream *)object;
+
+   // calculate offset
+   u64 offset = (u64)(s->offset + s->pos);
+
+	if(maxRequiredSize > 2048)
+		maxRequiredSize = 2048;
+
+   // read data
+	switch(szMethod)
+	{
+		case METHOD_SD:
+		case METHOD_USB:
+			fseek(fatfile, offset, SEEK_SET);
+			fread (sz_buffer, 1, maxRequiredSize, fatfile);
+			break;
+		case METHOD_DVD:
+			dvd_safe_read(sz_buffer, maxRequiredSize, offset);
+			break;
+		case METHOD_SMB:
+			SMB_ReadFile(sz_buffer, maxRequiredSize, offset, smbfile);
+			break;
+	}
+
+   *buffer = sz_buffer;
+   *processedSize = maxRequiredSize;
+   s->pos += *processedSize;
+
+   return SZ_OK;
+}
+
+// function used by the 7zip SDK to change the filepointer
+SZ_RESULT SzFileSeekImp(void *object, CFileSize pos)
+{
+   // the void* object is a SzFileInStream
+   SzFileInStream *s = (SzFileInStream *)object;
+
+   // check if the 7z SDK wants to move the pointer to somewhere after the EOF
+   if(pos >= s->len)
+   {
+       WaitPrompt((char *)"7z Error: The 7z SDK wants to start reading somewhere behind the EOF...");
+       return SZE_FAIL;
+   }
+
+   // save new position and return
+   s->pos = pos;
+   return SZ_OK;
+}
+
+/****************************************************************************
+* SzParse
+*
+* Opens a 7z file, and parses it
+* Right now doesn't parse 7z, since we'll always use the first file
+* But it could parse the entire 7z for full browsing capability
+***************************************************************************/
+
+int SzParse(char * filepath, int method)
+{
+	int nbfiles = 0;
+
+	// save the offset and the length of this file inside the archive stream structure
+	SzArchiveStream.offset = filelist[selection].offset;
+	SzArchiveStream.len = filelist[selection].length;
+	SzArchiveStream.pos = 0;
+
+	// open file
+	switch (method)
+	{
+		case METHOD_SD:
+		case METHOD_USB:
+			fatfile = fopen (filepath, "rb");
+			if(!fatfile)
+				return 0;
+			break;
+		case METHOD_SMB:
+			smbfile = OpenSMBFile(filepath);
+			if(!smbfile)
+				return 0;
+			break;
+	}
+
+	// set szMethod to current chosen load method
+	szMethod = method;
+
+	// set handler functions for reading data from FAT/SMB/DVD
+	SzArchiveStream.InStream.Read = SzFileReadImp;
+	SzArchiveStream.InStream.Seek = SzFileSeekImp;
+
+	// set default 7Zip SDK handlers for allocation and freeing memory
+	SzAllocImp.Alloc = SzAlloc;
+	SzAllocImp.Free = SzFree;
+	SzAllocTempImp.Alloc = SzAllocTemp;
+	SzAllocTempImp.Free = SzFreeTemp;
+
+	// prepare CRC and 7Zip database structures
+	InitCrcTable();
+	SzArDbExInit(&SzDb);
+
+	// open the archive
+	SzRes = SzArchiveOpen(&SzArchiveStream.InStream, &SzDb, &SzAllocImp,
+			&SzAllocTempImp);
+
+	if (SzRes != SZ_OK)
+	{
+		SzDisplayError(SzRes);
+		// free memory used by the 7z SDK
+		SzClose();
+	}
+	else // archive opened successfully
+	{
+		if(SzDb.Database.NumFiles > 0)
+		{
+			// Parses the 7z into a full file listing
+
+			// store the current 7z data
+			unsigned int oldLength = filelist[selection].length;
+			u64 oldOffset = filelist[selection].offset;
+
+			// erase all previous entries
+			memset(&filelist, 0, sizeof(FILEENTRIES) * MAXFILES);
+
+			// add '..' folder
+			strncpy(filelist[0].displayname, "..", 2);
+			filelist[0].flags = 1;
+			filelist[0].length = oldLength;
+			filelist[0].offset = oldOffset; // in case the user wants exit 7z
+
+			// get contents and parse them into file list structure
+			unsigned int SzI, SzJ;
+			SzJ = 1;
+			for (SzI = 0; SzI < SzDb.Database.NumFiles; SzI++)
+			{
+				SzF = SzDb.Database.Files + SzI;
+
+				// skip directories
+				if (SzF->IsDirectory)
+					continue;
+
+				// do not exceed MAXFILES to avoid possible buffer overflows
+				if (SzJ == (MAXFILES - 1))
+					break;
+
+				// parse information about this file to the dvd file list structure
+				strncpy(filelist[SzJ].filename, SzF->Name, MAXJOLIET); // copy joliet name (useless...)
+				filelist[SzJ].filename[MAXJOLIET] = 0; // terminate string
+				strncpy(filelist[SzJ].displayname, SzF->Name, MAXDISPLAY+1);	// crop name for display
+				filelist[SzJ].length = SzF->Size; // filesize
+				filelist[SzJ].offset = SzI; // the extraction function identifies the file with this number
+				filelist[SzJ].flags = 0; // only files will be displayed (-> no flags)
+				SzJ++;
+			}
+
+			// update maxfiles and select the first entry
+			offset = selection = 0;
+			nbfiles = SzJ;
+		}
+		else
+		{
+			SzArDbExFree(&SzDb, SzAllocImp.Free);
+		}
+	}
+
+	// close file
+	switch (method)
+	{
+		case METHOD_SD:
+		case METHOD_USB:
+			fclose(fatfile);
+			break;
+		case METHOD_SMB:
+			SMB_CloseFile (smbfile);
+			break;
+	}
+	return nbfiles;
+}
+
+/****************************************************************************
+* SzClose
+*
+* Closes a 7z file
+***************************************************************************/
+
+void SzClose()
+{
+	if(SzDb.Database.NumFiles > 0)
+		SzArDbExFree(&SzDb, SzAllocImp.Free);
+}
+
+/****************************************************************************
+* SzExtractFile
+*
+* Extracts the given file # into the buffer specified
+* Must parse the 7z BEFORE running this function
+***************************************************************************/
+
+int SzExtractFile(int i, unsigned char *buffer)
+{
+   // prepare some variables
+   SzBlockIndex = 0xFFFFFFFF;
+   SzOffset = 0;
+
+   // Unzip the file
+   ShowAction((char *)"Unzipping file. Please wait...");
+
+   SzRes = SzExtract2(
+           &SzArchiveStream.InStream,
+           &SzDb,
+           i,                      // index of file
+           &SzBlockIndex,          // index of solid block
+           &buffer,
+           &SzBufferSize,
+           &SzOffset,              // offset of stream for required file in *outBuffer
+           &SzOutSizeProcessed,    // size of file in *outBuffer
+           &SzAllocImp,
+           &SzAllocTempImp);
+
+   // close 7Zip archive and free memory
+	SzClose();
+
+   // check for errors
+   if(SzRes != SZ_OK)
+   {
+   	// display error message
+   	SzDisplayError(SzRes);
+       return 0;
+   }
+   else
+   {
+   	return SzOutSizeProcessed;
+   }
+}

source/ngc/unzip.h

@@ -16,9 +16,10 @@
 
 extern int IsZipFile (char *buffer);
 char * GetFirstZipFilename(int method);
-int UnZipFile (unsigned char *outbuffer, FILE* infile); // Reading from FAT
+int UnZipBuffer (unsigned char *outbuffer, int method);
-int UnZipFile (unsigned char *outbuffer, u64 inoffset); // Reading from DVD
+int SzParse(char * filepath, int method);
-int UnZipFile (unsigned char *outbuffer, SMBFILE infile); // Reading from SMB
+int SzExtractFile(int i, unsigned char *buffer);
+void SzClose();
 
 /*
  * Zip file header definition

source/snes9x/memmap.cpp

@@ -197,7 +197,7 @@
 #else
 #include <gccore.h>
 
-extern unsigned long ROMSize;
+extern unsigned long SNESROMSize;
 #endif
 
 #include "controls.h"
@@ -1142,7 +1142,7 @@ uint32 CMemory::FileLoader (uint8 *buffer, const char *filename, int32 maxsize)
 		 ***/
 		HeaderCount = 0;
 		uint8 *ptr = buffer;
-		uint32	size = ROMSize;
+		uint32	size = SNESROMSize;
 
 		size = HeaderRemove(size, HeaderCount, ptr);
 		ptr += size;

source/sz/7zAlloc.c

@@ -0,0 +1,70 @@
+/* 7zAlloc.c */
+
+#include <stdlib.h>
+#include "7zAlloc.h"
+
+/* #define _SZ_ALLOC_DEBUG */
+/* use _SZ_ALLOC_DEBUG to debug alloc/free operations */
+
+#ifdef _SZ_ALLOC_DEBUG
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
+#include <stdio.h>
+int g_allocCount = 0;
+int g_allocCountTemp = 0;
+#endif
+
+void *SzAlloc(size_t size)
+{
+  if (size == 0)
+    return 0;
+  #ifdef _SZ_ALLOC_DEBUG
+  fprintf(stderr, "\nAlloc %10d bytes; count = %10d", size, g_allocCount);
+  g_allocCount++;
+  #endif
+  return malloc(size);
+}
+
+void SzFree(void *address)
+{
+  #ifdef _SZ_ALLOC_DEBUG
+  if (address != 0)
+  {
+    g_allocCount--;
+    fprintf(stderr, "\nFree; count = %10d", g_allocCount);
+  }
+  #endif
+  free(address);
+}
+
+void *SzAllocTemp(size_t size)
+{
+  if (size == 0)
+    return 0;
+  #ifdef _SZ_ALLOC_DEBUG
+  fprintf(stderr, "\nAlloc_temp %10d bytes;  count = %10d", size, g_allocCountTemp);
+  g_allocCountTemp++;
+  #ifdef _WIN32
+  return HeapAlloc(GetProcessHeap(), 0, size);
+  #endif
+  #endif
+  return malloc(size);
+}
+
+void SzFreeTemp(void *address)
+{
+  #ifdef _SZ_ALLOC_DEBUG
+  if (address != 0)
+  {
+    g_allocCountTemp--;
+    fprintf(stderr, "\nFree_temp; count = %10d", g_allocCountTemp);
+  }
+  #ifdef _WIN32
+  HeapFree(GetProcessHeap(), 0, address);
+  return;
+  #endif
+  #endif
+  free(address);
+}

source/sz/7zAlloc.h

@@ -0,0 +1,20 @@
+/* 7zAlloc.h */
+
+#ifndef __7Z_ALLOC_H
+#define __7Z_ALLOC_H
+
+#include <stddef.h>
+
+typedef struct _ISzAlloc
+{
+  void *(*Alloc)(size_t size);
+  void (*Free)(void *address); /* address can be 0 */
+} ISzAlloc;
+
+void *SzAlloc(size_t size);
+void SzFree(void *address);
+
+void *SzAllocTemp(size_t size);
+void SzFreeTemp(void *address);
+
+#endif

source/sz/7zBuffer.c

@@ -0,0 +1,29 @@
+/* 7zBuffer.c */
+
+#include "7zBuffer.h"
+#include "7zAlloc.h"
+
+void SzByteBufferInit(CSzByteBuffer *buffer)
+{
+  buffer->Capacity = 0;
+  buffer->Items = 0;
+}
+
+int SzByteBufferCreate(CSzByteBuffer *buffer, size_t newCapacity, void * (*allocFunc)(size_t size))
+{
+  buffer->Capacity = newCapacity;
+  if (newCapacity == 0)
+  {
+    buffer->Items = 0;
+    return 1;
+  }
+  buffer->Items = (Byte *)allocFunc(newCapacity);
+  return (buffer->Items != 0);
+}
+
+void SzByteBufferFree(CSzByteBuffer *buffer, void (*freeFunc)(void *))
+{
+  freeFunc(buffer->Items);
+  buffer->Items = 0;
+  buffer->Capacity = 0;
+}

source/sz/7zBuffer.h

@@ -0,0 +1,19 @@
+/* 7zBuffer.h */
+
+#ifndef __7Z_BUFFER_H
+#define __7Z_BUFFER_H
+
+#include <stddef.h>
+#include "7zTypes.h"
+
+typedef struct _CSzByteBuffer
+{    
+	size_t Capacity;
+  Byte *Items;
+}CSzByteBuffer;
+
+void SzByteBufferInit(CSzByteBuffer *buffer);
+int SzByteBufferCreate(CSzByteBuffer *buffer, size_t newCapacity, void * (*allocFunc)(size_t size));
+void SzByteBufferFree(CSzByteBuffer *buffer, void (*freeFunc)(void *));
+
+#endif

source/sz/7zCrc.c

@@ -0,0 +1,76 @@
+/* 7zCrc.c */
+
+#include "7zCrc.h"
+
+#define kCrcPoly 0xEDB88320
+
+UInt32 g_CrcTable[256];
+
+void InitCrcTable()
+{
+  UInt32 i;
+  for (i = 0; i < 256; i++)
+  {
+    UInt32 r = i;
+    int j;
+    for (j = 0; j < 8; j++)
+      if (r & 1) 
+        r = (r >> 1) ^ kCrcPoly;
+      else     
+        r >>= 1;
+    g_CrcTable[i] = r;
+  }
+}
+
+void CrcInit(UInt32 *crc) { *crc = 0xFFFFFFFF; }
+UInt32 CrcGetDigest(UInt32 *crc) { return *crc ^ 0xFFFFFFFF; } 
+
+void CrcUpdateByte(UInt32 *crc, Byte b)
+{
+  *crc = g_CrcTable[((Byte)(*crc)) ^ b] ^ (*crc >> 8);
+}
+
+void CrcUpdateUInt16(UInt32 *crc, UInt16 v)
+{
+  CrcUpdateByte(crc, (Byte)v);
+  CrcUpdateByte(crc, (Byte)(v >> 8));
+}
+
+void CrcUpdateUInt32(UInt32 *crc, UInt32 v)
+{
+  int i;
+  for (i = 0; i < 4; i++)
+    CrcUpdateByte(crc, (Byte)(v >> (8 * i)));
+}
+
+void CrcUpdateUInt64(UInt32 *crc, UInt64 v)
+{
+  int i;
+  for (i = 0; i < 8; i++)
+  {
+    CrcUpdateByte(crc, (Byte)(v));
+    v >>= 8;
+  }
+}
+
+void CrcUpdate(UInt32 *crc, const void *data, size_t size)
+{
+  UInt32 v = *crc;
+  const Byte *p = (const Byte *)data;
+  for (; size > 0 ; size--, p++)
+    v = g_CrcTable[((Byte)(v)) ^ *p] ^ (v >> 8);
+  *crc = v;
+}
+
+UInt32 CrcCalculateDigest(const void *data, size_t size)
+{
+  UInt32 crc;
+  CrcInit(&crc);
+  CrcUpdate(&crc, data, size);
+  return CrcGetDigest(&crc);
+}
+
+int CrcVerifyDigest(UInt32 digest, const void *data, size_t size)
+{
+  return (CrcCalculateDigest(data, size) == digest);
+}

source/sz/7zCrc.h

@@ -0,0 +1,24 @@
+/* 7zCrc.h */
+
+#ifndef __7Z_CRC_H
+#define __7Z_CRC_H
+
+#include <stddef.h>
+
+#include "7zTypes.h"
+
+extern UInt32 g_CrcTable[256];
+void InitCrcTable();
+
+void CrcInit(UInt32 *crc);
+UInt32 CrcGetDigest(UInt32 *crc);
+void CrcUpdateByte(UInt32 *crc, Byte v);
+void CrcUpdateUInt16(UInt32 *crc, UInt16 v);
+void CrcUpdateUInt32(UInt32 *crc, UInt32 v);
+void CrcUpdateUInt64(UInt32 *crc, UInt64 v);
+void CrcUpdate(UInt32 *crc, const void *data, size_t size);
+ 
+UInt32 CrcCalculateDigest(const void *data, size_t size);
+int CrcVerifyDigest(UInt32 digest, const void *data, size_t size);
+
+#endif

source/sz/7zDecode.c

@@ -0,0 +1,309 @@
+/* 7zDecode.c */
+
+#include "7zDecode.h"
+#ifdef _SZ_ONE_DIRECTORY
+#include "LzmaDecode.h"
+#else
+#include "../../Compress/LZMA_C/LzmaDecode.h"
+#endif
+
+#ifdef _LZMA_OUT_READ
+#include <string.h> // for memcpy
+#endif
+
+CMethodID k_Copy = { { 0x0 }, 1 };
+CMethodID k_LZMA = { { 0x3, 0x1, 0x1 }, 3 };
+
+#ifdef _LZMA_IN_CB
+
+typedef struct _CLzmaInCallbackImp
+{
+  ILzmaInCallback InCallback;
+  ISzInStream *InStream;
+  size_t Size;
+} CLzmaInCallbackImp;
+
+int LzmaReadImp(void *object, const unsigned char **buffer, SizeT *size)
+{
+  CLzmaInCallbackImp *cb = (CLzmaInCallbackImp *)object;
+  size_t processedSize;
+  SZ_RESULT res;
+  *size = 0;
+  res = cb->InStream->Read((void *)cb->InStream, (void **)buffer, cb->Size, &processedSize);
+  *size = (SizeT)processedSize;
+  if (processedSize > cb->Size)
+    return (int)SZE_FAIL;
+  cb->Size -= processedSize;
+  if (res == SZ_OK)
+    return 0;
+  return (int)res;
+}
+
+#endif
+
+SZ_RESULT SzDecode(const CFileSize *packSizes, const CFolder *folder,
+    #ifdef _LZMA_IN_CB
+    ISzInStream *inStream,
+    #else
+    const Byte *inBuffer,
+    #endif
+    Byte *outBuffer, size_t outSize,
+    size_t *outSizeProcessed, ISzAlloc *allocMain)
+{
+  UInt32 si;
+  size_t inSize = 0;
+  CCoderInfo *coder;
+  if (folder->NumPackStreams != 1)
+    return SZE_NOTIMPL;
+  if (folder->NumCoders != 1)
+    return SZE_NOTIMPL;
+  coder = folder->Coders;
+  *outSizeProcessed = 0;
+
+  for (si = 0; si < folder->NumPackStreams; si++)
+    inSize += (size_t)packSizes[si];
+
+  if (AreMethodsEqual(&coder->MethodID, &k_Copy))
+  {
+    size_t i;
+    if (inSize != outSize)
+      return SZE_DATA_ERROR;
+    #ifdef _LZMA_IN_CB
+    for (i = 0; i < inSize;)
+    {
+      size_t j;
+      Byte *inBuffer;
+      size_t bufferSize;
+      RINOK(inStream->Read((void *)inStream,  (void **)&inBuffer, inSize - i, &bufferSize));
+      if (bufferSize == 0)
+        return SZE_DATA_ERROR;
+      if (bufferSize > inSize - i)
+        return SZE_FAIL;
+      *outSizeProcessed += bufferSize;
+      for (j = 0; j < bufferSize && i < inSize; j++, i++)
+        outBuffer[i] = inBuffer[j];
+    }
+    #else
+    for (i = 0; i < inSize; i++)
+      outBuffer[i] = inBuffer[i];
+    *outSizeProcessed = inSize;
+    #endif
+    return SZ_OK;
+  }
+
+  if (AreMethodsEqual(&coder->MethodID, &k_LZMA))
+  {
+    #ifdef _LZMA_IN_CB
+    CLzmaInCallbackImp lzmaCallback;
+    #else
+    SizeT inProcessed;
+    #endif
+
+    CLzmaDecoderState state;  /* it's about 24-80 bytes structure, if int is 32-bit */
+    int result;
+    SizeT outSizeProcessedLoc;
+
+    #ifdef _LZMA_IN_CB
+    lzmaCallback.Size = inSize;
+    lzmaCallback.InStream = inStream;
+    lzmaCallback.InCallback.Read = LzmaReadImp;
+    #endif
+
+    if (LzmaDecodeProperties(&state.Properties, coder->Properties.Items,
+        coder->Properties.Capacity) != LZMA_RESULT_OK)
+      return SZE_FAIL;
+
+    state.Probs = (CProb *)allocMain->Alloc(LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
+    if (state.Probs == 0)
+      return SZE_OUTOFMEMORY;
+
+    #ifdef _LZMA_OUT_READ
+    if (state.Properties.DictionarySize == 0)
+      state.Dictionary = 0;
+    else
+    {
+      state.Dictionary = (unsigned char *)allocMain->Alloc(state.Properties.DictionarySize);
+      if (state.Dictionary == 0)
+      {
+        allocMain->Free(state.Probs);
+        return SZE_OUTOFMEMORYDIC;
+      }
+    }
+    LzmaDecoderInit(&state);
+    #endif
+
+    result = LzmaDecode(&state,
+        #ifdef _LZMA_IN_CB
+        &lzmaCallback.InCallback,
+        #else
+        inBuffer, (SizeT)inSize, &inProcessed,
+        #endif
+        outBuffer, (SizeT)outSize, &outSizeProcessedLoc);
+    *outSizeProcessed = (size_t)outSizeProcessedLoc;
+    allocMain->Free(state.Probs);
+    #ifdef _LZMA_OUT_READ
+    allocMain->Free(state.Dictionary);
+    #endif
+    if (result == LZMA_RESULT_DATA_ERROR)
+      return SZE_DATA_ERROR;
+    if (result != LZMA_RESULT_OK)
+      return SZE_FAIL;
+    return SZ_OK;
+  }
+  return SZE_NOTIMPL;
+}
+
+#ifdef _LZMA_OUT_READ
+// like SzDecode but uses less memory
+SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,
+    ISzInStream *inStream,
+    Byte *outBuffer, size_t outSize,
+    size_t *outSizeProcessed, ISzAlloc *allocMain,
+	size_t *fileOffset, size_t *fileSize)
+{
+  UInt32 si;
+  size_t inSize = 0;
+  CCoderInfo *coder;
+  if (folder->NumPackStreams != 1)
+    return SZE_NOTIMPL;
+  if (folder->NumCoders != 1)
+    return SZE_NOTIMPL;
+  coder = folder->Coders;
+  *outSizeProcessed = 0;
+
+  for (si = 0; si < folder->NumPackStreams; si++)
+    inSize += (size_t)packSizes[si];
+
+  if (AreMethodsEqual(&coder->MethodID, &k_Copy))
+  {
+    size_t i;
+    if (inSize != outSize)
+      return SZE_DATA_ERROR;
+    #ifdef _LZMA_IN_CB
+    for (i = 0; i < inSize;)
+    {
+      size_t j;
+      Byte *inBuffer;
+      size_t bufferSize;
+      RINOK(inStream->Read((void *)inStream,  (void **)&inBuffer, inSize - i, &bufferSize));
+      if (bufferSize == 0)
+        return SZE_DATA_ERROR;
+      if (bufferSize > inSize - i)
+        return SZE_FAIL;
+      *outSizeProcessed += bufferSize;
+      for (j = 0; j < bufferSize && i < inSize; j++, i++)
+        outBuffer[i] = inBuffer[j];
+    }
+    #else
+    for (i = 0; i < inSize; i++)
+      outBuffer[i] = inBuffer[i];
+    *outSizeProcessed = inSize;
+    #endif
+    return SZ_OK;
+  }
+
+  if (AreMethodsEqual(&coder->MethodID, &k_LZMA))
+  {
+    #ifdef _LZMA_IN_CB
+    CLzmaInCallbackImp lzmaCallback;
+    #else
+    SizeT inProcessed;
+    #endif
+
+    CLzmaDecoderState state;  /* it's about 24-80 bytes structure, if int is 32-bit */
+    int result;
+    SizeT outSizeProcessedLoc;
+
+    #ifdef _LZMA_IN_CB
+    lzmaCallback.Size = inSize;
+    lzmaCallback.InStream = inStream;
+    lzmaCallback.InCallback.Read = LzmaReadImp;
+    #endif
+
+    if (LzmaDecodeProperties(&state.Properties, coder->Properties.Items,
+        coder->Properties.Capacity) != LZMA_RESULT_OK)
+      return SZE_FAIL;
+
+    state.Probs = (CProb *)allocMain->Alloc(LzmaGetNumProbs(&state.Properties) * sizeof(CProb));
+    if (state.Probs == 0)
+      return SZE_OUTOFMEMORY;
+
+    if (state.Properties.DictionarySize == 0)
+      state.Dictionary = 0;
+    else
+    {
+      state.Dictionary = (unsigned char *)allocMain->Alloc(state.Properties.DictionarySize);
+      if (state.Dictionary == 0)
+      {
+        allocMain->Free(state.Probs);
+        return SZE_OUTOFMEMORY;
+      }
+    }
+    LzmaDecoderInit(&state);
+
+    // allocate memory for the temporary buffer
+    Byte *tmpBuffer = (Byte *)allocMain->Alloc(_LZMA_TEMP_BUFFER_SIZE);
+
+    // decompress data in _LZMA_TEMP_BUFFER_SIZE byte steps and copy the wanted file to outBuffer
+	size_t bytesLeft = *fileSize; // total bytes remaining to be read
+	size_t bytesToRead = 0; // bytes to read on this pass
+	size_t bytesRead = 0; // total bytes read
+	size_t offset = 0; // buffer offset
+	do
+	{
+		if(bytesLeft > _LZMA_TEMP_BUFFER_SIZE)
+			bytesToRead = _LZMA_TEMP_BUFFER_SIZE;
+		else
+			bytesToRead = bytesLeft;
+
+		bytesLeft -= bytesToRead;
+
+		// decompress next bytes
+		result = LzmaDecode(&state,
+							#ifdef _LZMA_IN_CB
+							&lzmaCallback.InCallback,
+							#else
+							//inBuffer, (SizeT)inSize, &inProcessed, //TODO!
+							#endif
+							tmpBuffer, bytesToRead, &outSizeProcessedLoc
+							);
+
+		// check result
+		if(result == LZMA_RESULT_DATA_ERROR)
+			return SZE_DATA_ERROR;
+		else if(result != LZMA_RESULT_OK)
+			return SZE_FAIL;
+
+		// normally this should never happen
+		if(outSizeProcessedLoc > _LZMA_TEMP_BUFFER_SIZE)
+		{
+			return SZE_FAIL;
+		}
+
+		memcpy(outBuffer + offset, tmpBuffer, outSizeProcessedLoc);
+		bytesRead += bytesToRead;
+		offset += outSizeProcessedLoc;
+	}
+	while(bytesLeft > 0);
+
+/*    result = LzmaDecode(&state,
+        #ifdef _LZMA_IN_CB
+        &lzmaCallback.InCallback,
+        #else
+        inBuffer, (SizeT)inSize, &inProcessed,
+        #endif
+        outBuffer, (SizeT)outSize, &outSizeProcessedLoc);*/
+    //*outSizeProcessed = (size_t)outSizeProcessedLoc;
+    *outSizeProcessed = offset;
+    allocMain->Free(tmpBuffer); // free the temporary buffer again
+    allocMain->Free(state.Probs);
+    allocMain->Free(state.Dictionary);
+/*    if (result == LZMA_RESULT_DATA_ERROR)
+      return SZE_DATA_ERROR;
+    if (result != LZMA_RESULT_OK)
+      return SZE_FAIL;*/
+    return SZ_OK;
+  }
+  return SZE_NOTIMPL;
+}
+#endif

source/sz/7zDecode.h

@@ -0,0 +1,37 @@
+/* 7zDecode.h */
+
+#if defined(_LZMA_OUT_READ) && !defined(_LZMA_IN_CB)
+#error "Fixme: _LZMA_OUT_READ && _LZMA_IN_CB isn't currently possible!"
+#endif
+
+#ifndef __7Z_DECODE_H
+#define __7Z_DECODE_H
+
+#include "7zItem.h"
+#include "7zAlloc.h"
+#ifdef _LZMA_IN_CB
+#include "7zIn.h"
+#endif
+
+SZ_RESULT SzDecode(const CFileSize *packSizes, const CFolder *folder,
+    #ifdef _LZMA_IN_CB
+    ISzInStream *stream,
+    #else
+    const Byte *inBuffer,
+    #endif
+    Byte *outBuffer, size_t outSize,
+    size_t *outSizeProcessed, ISzAlloc *allocMain);
+
+#ifdef _LZMA_OUT_READ
+#ifndef _LZMA_TEMP_BUFFER_SIZE
+#define _LZMA_TEMP_BUFFER_SIZE (2048) // size of the temporary buffer in bytes
+#endif
+
+SZ_RESULT SzDecode2(const CFileSize *packSizes, const CFolder *folder,
+    ISzInStream *stream,
+    Byte *outBuffer, size_t outSize,
+    size_t *outSizeProcessed, ISzAlloc *allocMain,
+	size_t *fileOffset, size_t *fileSize);
+#endif // #ifdef _LZMA_OUT_READ
+
+#endif

source/sz/7zExtract.c

@@ -0,0 +1,254 @@
+/* 7zExtract.c */
+
+#include "7zExtract.h"
+#include "7zDecode.h"
+#include "7zCrc.h"
+
+SZ_RESULT SzExtract(
+    ISzInStream *inStream,
+    CArchiveDatabaseEx *db,
+    UInt32 fileIndex,
+    UInt32 *blockIndex,
+    Byte **outBuffer,
+    size_t *outBufferSize,
+    size_t *offset,
+    size_t *outSizeProcessed,
+    ISzAlloc *allocMain,
+    ISzAlloc *allocTemp)
+{
+  UInt32 folderIndex = db->FileIndexToFolderIndexMap[fileIndex];
+  SZ_RESULT res = SZ_OK;
+  *offset = 0;
+  *outSizeProcessed = 0;
+  if (folderIndex == (UInt32)-1)
+  {
+    allocMain->Free(*outBuffer);
+    *blockIndex = folderIndex;
+    *outBuffer = 0;
+    *outBufferSize = 0;
+    return SZ_OK;
+  }
+
+  if (*outBuffer == 0 || *blockIndex != folderIndex)
+  {
+    CFolder *folder = db->Database.Folders + folderIndex;
+    CFileSize unPackSize = SzFolderGetUnPackSize(folder);
+    #ifndef _LZMA_IN_CB
+    CFileSize packSize = SzArDbGetFolderFullPackSize(db, folderIndex);
+    Byte *inBuffer = 0;
+    size_t processedSize;
+    #endif
+    *blockIndex = folderIndex;
+    allocMain->Free(*outBuffer);
+    *outBuffer = 0;
+
+    RINOK(inStream->Seek(inStream, SzArDbGetFolderStreamPos(db, folderIndex, 0)));
+
+    #ifndef _LZMA_IN_CB
+    if (packSize != 0)
+    {
+      inBuffer = (Byte *)allocTemp->Alloc((size_t)packSize);
+      if (inBuffer == 0)
+        return SZE_OUTOFMEMORY;
+    }
+    res = inStream->Read(inStream, inBuffer, (size_t)packSize, &processedSize);
+    if (res == SZ_OK && processedSize != (size_t)packSize)
+      res = SZE_FAIL;
+    #endif
+    if (res == SZ_OK)
+    {
+      *outBufferSize = (size_t)unPackSize;
+      if (unPackSize != 0)
+      {
+        *outBuffer = (Byte *)allocMain->Alloc((size_t)unPackSize);
+        if (*outBuffer == 0)
+          res = SZE_OUTOFMEMORY;
+      }
+      if (res == SZ_OK)
+      {
+        size_t outRealSize;
+        res = SzDecode(db->Database.PackSizes +
+          db->FolderStartPackStreamIndex[folderIndex], folder,
+          #ifdef _LZMA_IN_CB
+          inStream,
+          #else
+          inBuffer,
+          #endif
+          *outBuffer, (size_t)unPackSize, &outRealSize, allocTemp);
+        if (res == SZ_OK)
+        {
+          if (outRealSize == (size_t)unPackSize)
+          {
+            if (folder->UnPackCRCDefined)
+            {
+              if (!CrcVerifyDigest(folder->UnPackCRC, *outBuffer, (size_t)unPackSize))
+                res = SZE_FAIL;
+            }
+          }
+          else
+            res = SZE_FAIL;
+        }
+      }
+    }
+    #ifndef _LZMA_IN_CB
+    allocTemp->Free(inBuffer);
+    #endif
+  }
+  if (res == SZ_OK)
+  {
+    UInt32 i;
+    CFileItem *fileItem = db->Database.Files + fileIndex;
+    *offset = 0;
+    for(i = db->FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
+      *offset += (UInt32)db->Database.Files[i].Size;
+    *outSizeProcessed = (size_t)fileItem->Size;
+    if (*offset + *outSizeProcessed > *outBufferSize)
+      return SZE_FAIL;
+    {
+      if (fileItem->IsFileCRCDefined)
+      {
+        if (!CrcVerifyDigest(fileItem->FileCRC, *outBuffer + *offset, *outSizeProcessed))
+          res = SZE_FAIL;
+      }
+    }
+  }
+  return res;
+}
+
+#ifdef _LZMA_OUT_READ
+// similar to SzExtract but needs less memory
+SZ_RESULT SzExtract2(
+    ISzInStream *inStream,
+    CArchiveDatabaseEx *db,
+    UInt32 fileIndex,
+    UInt32 *blockIndex,
+    Byte **outBuffer,
+    size_t *outBufferSize,
+    size_t *offset,
+    size_t *outSizeProcessed,
+    ISzAlloc *allocMain,
+    ISzAlloc *allocTemp)
+{
+  UInt32 folderIndex = db->FileIndexToFolderIndexMap[fileIndex];
+  SZ_RESULT res = SZ_OK;
+  *offset = 0;
+  *outSizeProcessed = 0;
+  if (folderIndex == (UInt32)-1)
+  {
+    *blockIndex = folderIndex;
+    #ifndef NGC
+    allocMain->Free(*outBuffer);
+    *outBuffer = 0;
+    #endif
+    *outBufferSize = 0;
+    return SZ_OK;
+  }
+
+//  if (*outBuffer == 0 || *blockIndex != folderIndex)
+//  {
+    CFolder *folder = db->Database.Folders + folderIndex;
+    CFileSize unPackSize = SzFolderGetUnPackSize(folder);
+    #ifndef _LZMA_IN_CB
+    CFileSize packSize = SzArDbGetFolderFullPackSize(db, folderIndex);
+    Byte *inBuffer = 0;
+    size_t processedSize;
+    #endif
+    *blockIndex = folderIndex;
+    #ifndef NGC
+    allocMain->Free(*outBuffer);
+    *outBuffer = 0;
+    #endif
+
+    RINOK(inStream->Seek(inStream, SzArDbGetFolderStreamPos(db, folderIndex, 0)));
+
+    #ifndef _LZMA_IN_CB
+    if (packSize != 0)
+    {
+      inBuffer = (Byte *)allocTemp->Alloc((size_t)packSize);
+      if (inBuffer == 0)
+        return SZE_OUTOFMEMORY;
+    }
+    res = inStream->Read(inStream, inBuffer, (size_t)packSize, &processedSize);
+    if (res == SZ_OK && processedSize != (size_t)packSize)
+      res = SZE_FAIL;
+    #endif
+    if (res == SZ_OK)
+    {
+	  // calculate file offset and filesize
+      CFileItem *fileItem = db->Database.Files + fileIndex;
+	  UInt32 i;
+	  *offset = 0;
+	  for(i = db->FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
+		*offset += (UInt32)db->Database.Files[i].Size;
+	  *outSizeProcessed = (size_t)fileItem->Size;
+      *outBufferSize = (size_t)fileItem->Size;
+      if (unPackSize != 0)
+      {
+		#ifndef NGC
+        *outBuffer = (Byte *)allocMain->Alloc((size_t)fileItem->Size);
+        if (*outBuffer == 0)
+          res = SZE_OUTOFMEMORY;
+        #endif
+      }
+      if (res == SZ_OK)
+      {
+
+        size_t outRealSize;
+        res = SzDecode2(db->Database.PackSizes +
+          db->FolderStartPackStreamIndex[folderIndex], folder,
+          #ifdef _LZMA_IN_CB
+          inStream,
+          #else
+          inBuffer,
+          #endif
+          *outBuffer, (size_t)unPackSize, &outRealSize, allocTemp,
+		  offset, outSizeProcessed
+		  );
+		  *outSizeProcessed = outRealSize;
+/*        if (res == SZ_OK) // we can't validate the CRC of the whole data stream because we only extracted the wanted file
+        {
+          if (outRealSize == (size_t)unPackSize)
+          {
+            if (folder->UnPackCRCDefined)
+            {
+              if (!CrcVerifyDigest(folder->UnPackCRC, *outBuffer, (size_t)unPackSize))
+                res = SZE_FAIL;
+            }
+          }
+          else
+            res = SZE_FAIL;
+        }*/
+      }
+//    }
+    #ifndef _LZMA_IN_CB
+    allocTemp->Free(inBuffer);
+    #endif
+  }
+  if (res == SZ_OK)
+  {
+/*    UInt32 i;
+    CFileItem *fileItem = db->Database.Files + fileIndex;
+    *offset = 0;
+    for(i = db->FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
+      *offset += (UInt32)db->Database.Files[i].Size;
+    *outSizeProcessed = (size_t)fileItem->Size;*/
+    //CFileItem *fileItem = db->Database.Files + fileIndex;
+    if (/**offset +*/ *outSizeProcessed > *outBufferSize)
+      return SZE_FAIL;
+    {
+      //if (fileItem->IsFileCRCDefined)
+      //{
+       // if (!CrcVerifyDigest(fileItem->FileCRC, *outBuffer/* + *offset*/, *outSizeProcessed))
+        //  res = SZE_CRC_ERROR; // why does SzExtract return SZE_FAIL when we can return SZE_CRC_ERROR?
+      //}
+    }
+  }
+
+  // change *offset to 0 because SzExtract normally decompresses the whole solid block
+  // and sets *offset to the offset of the wanted file.
+  // SzDecode2 does only copy the needed file to the output buffer and has to set *offset
+  // to 0 to ensure compatibility with SzExtract
+  *offset = 0;
+  return res;
+}
+#endif

source/sz/7zExtract.h

@@ -0,0 +1,60 @@
+/* 7zExtract.h */
+
+#if defined(_LZMA_OUT_READ) && !defined(_LZMA_IN_CB)
+#error "Fixme: _LZMA_OUT_READ && _LZMA_IN_CB isn't currently possible!"
+#endif
+
+#ifndef __7Z_EXTRACT_H
+#define __7Z_EXTRACT_H
+
+#include "7zIn.h"
+
+/*
+  SzExtract extracts file from archive
+  
+  SzExtract2 does the same but needs less memory
+
+  *outBuffer must be 0 before first call for each new archive. 
+
+  Extracting cache:
+    If you need to decompress more than one file, you can send 
+    these values from previous call:
+      *blockIndex, 
+      *outBuffer, 
+      *outBufferSize
+    You can consider "*outBuffer" as cache of solid block. If your archive is solid, 
+    it will increase decompression speed.
+  
+    If you use external function, you can declare these 3 cache variables 
+    (blockIndex, outBuffer, outBufferSize) as static in that external function.
+    
+    Free *outBuffer and set *outBuffer to 0, if you want to flush cache.
+*/
+
+SZ_RESULT SzExtract(
+    ISzInStream *inStream, 
+    CArchiveDatabaseEx *db,
+    UInt32 fileIndex,         /* index of file */
+    UInt32 *blockIndex,       /* index of solid block */
+    Byte **outBuffer,         /* pointer to pointer to output buffer (allocated with allocMain) */
+    size_t *outBufferSize,    /* buffer size for output buffer */
+    size_t *offset,           /* offset of stream for required file in *outBuffer */
+    size_t *outSizeProcessed, /* size of file in *outBuffer */
+    ISzAlloc *allocMain,
+    ISzAlloc *allocTemp);
+    
+#ifdef _LZMA_OUT_READ
+SZ_RESULT SzExtract2(
+    ISzInStream *inStream, 
+    CArchiveDatabaseEx *db,
+    UInt32 fileIndex,         /* index of file */
+    UInt32 *blockIndex,       /* index of solid block */
+    Byte **outBuffer,         /* pointer to pointer to output buffer (allocated with allocMain) */
+    size_t *outBufferSize,    /* buffer size for output buffer */
+    size_t *offset,           /* offset of stream for required file in *outBuffer */
+    size_t *outSizeProcessed, /* size of file in *outBuffer */
+    ISzAlloc *allocMain,
+    ISzAlloc *allocTemp);
+#endif
+
+#endif

source/sz/7zHeader.c

@@ -0,0 +1,5 @@
+/*  7zHeader.c */
+
+#include "7zHeader.h"
+
+Byte k7zSignature[k7zSignatureSize] = {'7', 'z', 0xBC, 0xAF, 0x27, 0x1C};

source/sz/7zHeader.h

@@ -0,0 +1,55 @@
+/* 7zHeader.h */
+
+#ifndef __7Z_HEADER_H
+#define __7Z_HEADER_H
+
+#include "7zTypes.h"
+
+#define k7zSignatureSize 6
+extern Byte k7zSignature[k7zSignatureSize];
+
+#define k7zMajorVersion 0
+
+#define k7zStartHeaderSize 0x20
+
+enum EIdEnum
+{
+  k7zIdEnd,
+    
+  k7zIdHeader,
+    
+  k7zIdArchiveProperties,
+    
+  k7zIdAdditionalStreamsInfo,
+  k7zIdMainStreamsInfo,
+  k7zIdFilesInfo,
+  
+  k7zIdPackInfo,
+  k7zIdUnPackInfo,
+  k7zIdSubStreamsInfo,
+  
+  k7zIdSize,
+  k7zIdCRC,
+  
+  k7zIdFolder,
+  
+  k7zIdCodersUnPackSize,
+  k7zIdNumUnPackStream,
+  
+  k7zIdEmptyStream,
+  k7zIdEmptyFile,
+  k7zIdAnti,
+  
+  k7zIdName,
+  k7zIdCreationTime,
+  k7zIdLastAccessTime,
+  k7zIdLastWriteTime,
+  k7zIdWinAttributes,
+  k7zIdComment,
+  
+  k7zIdEncodedHeader,
+  
+  k7zIdStartPos
+};
+
+#endif

source/sz/7zIn.h

@@ -0,0 +1,55 @@
+/* 7zIn.h */
+
+#ifndef __7Z_IN_H
+#define __7Z_IN_H
+
+#include "7zHeader.h"
+#include "7zItem.h"
+#include "7zAlloc.h"
+ 
+typedef struct _CInArchiveInfo
+{
+  CFileSize StartPositionAfterHeader; 
+  CFileSize DataStartPosition;
+}CInArchiveInfo;
+
+typedef struct _CArchiveDatabaseEx
+{
+  CArchiveDatabase Database;
+  CInArchiveInfo ArchiveInfo;
+  UInt32 *FolderStartPackStreamIndex;
+  CFileSize *PackStreamStartPositions;
+  UInt32 *FolderStartFileIndex;
+  UInt32 *FileIndexToFolderIndexMap;
+}CArchiveDatabaseEx;
+
+void SzArDbExInit(CArchiveDatabaseEx *db);
+void SzArDbExFree(CArchiveDatabaseEx *db, void (*freeFunc)(void *));
+CFileSize SzArDbGetFolderStreamPos(CArchiveDatabaseEx *db, UInt32 folderIndex, UInt32 indexInFolder);
+CFileSize SzArDbGetFolderFullPackSize(CArchiveDatabaseEx *db, UInt32 folderIndex);
+
+typedef struct _ISzInStream
+{
+  #ifdef _LZMA_IN_CB
+  SZ_RESULT (*Read)(
+      void *object,           /* pointer to ISzInStream itself */
+      void **buffer,          /* out: pointer to buffer with data */
+      size_t maxRequiredSize, /* max required size to read */
+      size_t *processedSize); /* real processed size. 
+                                 processedSize can be less than maxRequiredSize.
+                                 If processedSize == 0, then there are no more 
+                                 bytes in stream. */
+  #else
+  SZ_RESULT (*Read)(void *object, void *buffer, size_t size, size_t *processedSize);
+  #endif
+  SZ_RESULT (*Seek)(void *object, CFileSize pos);
+} ISzInStream;
+
+ 
+int SzArchiveOpen(
+    ISzInStream *inStream, 
+    CArchiveDatabaseEx *db,
+    ISzAlloc *allocMain, 
+    ISzAlloc *allocTemp);
+ 
+#endif

source/sz/7zItem.c

@@ -0,0 +1,133 @@
+/* 7zItem.c */
+
+#include "7zItem.h"
+#include "7zAlloc.h"
+
+void SzCoderInfoInit(CCoderInfo *coder)
+{
+  SzByteBufferInit(&coder->Properties);
+}
+
+void SzCoderInfoFree(CCoderInfo *coder, void (*freeFunc)(void *p))
+{
+  SzByteBufferFree(&coder->Properties, freeFunc);
+  SzCoderInfoInit(coder);
+}
+
+void SzFolderInit(CFolder *folder)
+{
+  folder->NumCoders = 0;
+  folder->Coders = 0;
+  folder->NumBindPairs = 0;
+  folder->BindPairs = 0;
+  folder->NumPackStreams = 0;
+  folder->PackStreams = 0;
+  folder->UnPackSizes = 0;
+  folder->UnPackCRCDefined = 0;
+  folder->UnPackCRC = 0;
+  folder->NumUnPackStreams = 0;
+}
+
+void SzFolderFree(CFolder *folder, void (*freeFunc)(void *p))
+{
+  UInt32 i;
+  for (i = 0; i < folder->NumCoders; i++)
+    SzCoderInfoFree(&folder->Coders[i], freeFunc);
+  freeFunc(folder->Coders);
+  freeFunc(folder->BindPairs);
+  freeFunc(folder->PackStreams);
+  freeFunc(folder->UnPackSizes);
+  SzFolderInit(folder);
+}
+
+UInt32 SzFolderGetNumOutStreams(CFolder *folder)
+{
+  UInt32 result = 0;
+  UInt32 i;
+  for (i = 0; i < folder->NumCoders; i++)
+    result += folder->Coders[i].NumOutStreams;
+  return result;
+}
+
+int SzFolderFindBindPairForInStream(CFolder *folder, UInt32 inStreamIndex)
+{
+  UInt32 i;
+  for(i = 0; i < folder->NumBindPairs; i++)
+    if (folder->BindPairs[i].InIndex == inStreamIndex)
+      return i;
+  return -1;
+}
+
+
+int SzFolderFindBindPairForOutStream(CFolder *folder, UInt32 outStreamIndex)
+{
+  UInt32 i;
+  for(i = 0; i < folder->NumBindPairs; i++)
+    if (folder->BindPairs[i].OutIndex == outStreamIndex)
+      return i;
+  return -1;
+}
+
+CFileSize SzFolderGetUnPackSize(CFolder *folder)
+{ 
+  int i = (int)SzFolderGetNumOutStreams(folder);
+  if (i == 0)
+    return 0;
+  for (i--; i >= 0; i--)
+    if (SzFolderFindBindPairForOutStream(folder, i) < 0)
+      return folder->UnPackSizes[i];
+  /* throw 1; */
+  return 0;
+}
+
+/*
+int FindPackStreamArrayIndex(int inStreamIndex) const
+{
+  for(int i = 0; i < PackStreams.Size(); i++)
+  if (PackStreams[i] == inStreamIndex)
+    return i;
+  return -1;
+}
+*/
+
+void SzFileInit(CFileItem *fileItem)
+{
+  fileItem->IsFileCRCDefined = 0;
+  fileItem->HasStream = 1;
+  fileItem->IsDirectory = 0;
+  fileItem->IsAnti = 0;
+  fileItem->Name = 0;
+}
+
+void SzFileFree(CFileItem *fileItem, void (*freeFunc)(void *p))
+{
+  freeFunc(fileItem->Name);
+  SzFileInit(fileItem);
+}
+
+void SzArchiveDatabaseInit(CArchiveDatabase *db)
+{
+  db->NumPackStreams = 0;
+  db->PackSizes = 0;
+  db->PackCRCsDefined = 0;
+  db->PackCRCs = 0;
+  db->NumFolders = 0;
+  db->Folders = 0;
+  db->NumFiles = 0;
+  db->Files = 0;
+}
+
+void SzArchiveDatabaseFree(CArchiveDatabase *db, void (*freeFunc)(void *))
+{
+  UInt32 i;
+  for (i = 0; i < db->NumFolders; i++)
+    SzFolderFree(&db->Folders[i], freeFunc);
+  for (i = 0; i < db->NumFiles; i++)
+    SzFileFree(&db->Files[i], freeFunc);
+  freeFunc(db->PackSizes);
+  freeFunc(db->PackCRCsDefined);
+  freeFunc(db->PackCRCs);
+  freeFunc(db->Folders);
+  freeFunc(db->Files);
+  SzArchiveDatabaseInit(db);
+}

source/sz/7zItem.h

@@ -0,0 +1,90 @@
+/* 7zItem.h */
+
+#ifndef __7Z_ITEM_H
+#define __7Z_ITEM_H
+
+#include "7zMethodID.h"
+#include "7zHeader.h"
+#include "7zBuffer.h"
+
+typedef struct _CCoderInfo
+{
+  UInt32 NumInStreams;
+  UInt32 NumOutStreams;
+  CMethodID MethodID;
+  CSzByteBuffer Properties;
+}CCoderInfo;
+
+void SzCoderInfoInit(CCoderInfo *coder);
+void SzCoderInfoFree(CCoderInfo *coder, void (*freeFunc)(void *p));
+
+typedef struct _CBindPair
+{
+  UInt32 InIndex;
+  UInt32 OutIndex;
+}CBindPair;
+
+typedef struct _CFolder
+{
+  UInt32 NumCoders;
+  CCoderInfo *Coders;
+  UInt32 NumBindPairs;
+  CBindPair *BindPairs;
+  UInt32 NumPackStreams; 
+  UInt32 *PackStreams;
+  CFileSize *UnPackSizes;
+  int UnPackCRCDefined;
+  UInt32 UnPackCRC;
+
+  UInt32 NumUnPackStreams;
+}CFolder;
+
+void SzFolderInit(CFolder *folder);
+CFileSize SzFolderGetUnPackSize(CFolder *folder);
+int SzFolderFindBindPairForInStream(CFolder *folder, UInt32 inStreamIndex);
+UInt32 SzFolderGetNumOutStreams(CFolder *folder);
+CFileSize SzFolderGetUnPackSize(CFolder *folder);
+
+/* #define CArchiveFileTime UInt64 */
+
+typedef struct _CFileItem
+{
+  /*
+  CArchiveFileTime LastWriteTime;
+  CFileSize StartPos;
+  UInt32 Attributes; 
+  */
+  CFileSize Size;
+  UInt32 FileCRC;
+  char *Name;
+
+  Byte IsFileCRCDefined;
+  Byte HasStream;
+  Byte IsDirectory;
+  Byte IsAnti;
+  /*
+  int AreAttributesDefined;
+  int IsLastWriteTimeDefined;
+  int IsStartPosDefined;
+  */
+}CFileItem;
+
+void SzFileInit(CFileItem *fileItem);
+
+typedef struct _CArchiveDatabase
+{
+  UInt32 NumPackStreams;
+  CFileSize *PackSizes;
+  Byte *PackCRCsDefined;
+  UInt32 *PackCRCs;
+  UInt32 NumFolders;
+  CFolder *Folders;
+  UInt32 NumFiles;
+  CFileItem *Files;
+}CArchiveDatabase;
+
+void SzArchiveDatabaseInit(CArchiveDatabase *db);
+void SzArchiveDatabaseFree(CArchiveDatabase *db, void (*freeFunc)(void *));
+
+
+#endif

source/sz/7zMethodID.c

@@ -0,0 +1,14 @@
+/* 7zMethodID.c */
+
+#include "7zMethodID.h"
+
+int AreMethodsEqual(CMethodID *a1, CMethodID *a2)
+{
+  int i;
+  if (a1->IDSize != a2->IDSize)
+    return 0;
+  for (i = 0; i < a1->IDSize; i++)
+    if (a1->ID[i] != a2->ID[i])
+      return 0;
+  return 1;
+}

source/sz/7zMethodID.h

@@ -0,0 +1,18 @@
+/* 7zMethodID.h */
+
+#ifndef __7Z_METHOD_ID_H
+#define __7Z_METHOD_ID_H
+
+#include "7zTypes.h"
+
+#define kMethodIDSize 15
+  
+typedef struct _CMethodID
+{
+  Byte ID[kMethodIDSize];
+  Byte IDSize;
+} CMethodID;
+
+int AreMethodsEqual(CMethodID *a1, CMethodID *a2);
+
+#endif

source/sz/7zTypes.h

@@ -0,0 +1,71 @@
+/* 7zTypes.h */
+
+#ifndef __COMMON_TYPES_H
+#define __COMMON_TYPES_H
+
+#ifndef _7ZIP_BYTE_DEFINED
+#define _7ZIP_BYTE_DEFINED
+#ifndef ZCONF_H
+typedef unsigned char Byte;
+#endif
+#endif
+
+#ifndef _7ZIP_UINT16_DEFINED
+#define _7ZIP_UINT16_DEFINED
+typedef unsigned short UInt16;
+#endif
+
+#ifndef _7ZIP_UINT32_DEFINED
+#define _7ZIP_UINT32_DEFINED
+#ifdef _LZMA_UINT32_IS_ULONG
+typedef unsigned long UInt32;
+#else
+typedef unsigned int UInt32;
+#endif
+#endif
+
+/* #define _SZ_NO_INT_64 */
+/* define it your compiler doesn't support long long int */
+
+#ifndef _7ZIP_UINT64_DEFINED
+#define _7ZIP_UINT64_DEFINED
+#ifdef _SZ_NO_INT_64
+typedef unsigned long UInt64;
+#else
+#ifdef _MSC_VER
+typedef unsigned __int64 UInt64;
+#else
+typedef unsigned long long int UInt64;
+#endif
+#endif
+#endif
+
+
+/* #define _SZ_FILE_SIZE_64 */
+/* Use _SZ_FILE_SIZE_64 if you need support for files larger than 4 GB*/
+
+#ifndef CFileSize
+#ifdef _SZ_FILE_SIZE_64
+typedef UInt64 CFileSize;
+#else
+typedef UInt32 CFileSize;
+#endif
+#endif
+
+#define SZ_RESULT int
+
+#define SZ_OK (0)
+#define SZE_DATA_ERROR (1)
+#define SZE_OUTOFMEMORY (2)
+#define SZE_CRC_ERROR (3)
+
+#define SZE_NOTIMPL (4)
+#define SZE_FAIL (5)
+
+#define SZE_ARCHIVE_ERROR (6)
+
+#define SZE_OUTOFMEMORYDIC (7)
+
+#define RINOK(x) { int __result_ = (x); if(__result_ != 0) return __result_; }
+
+#endif

source/sz/LzmaDecode.c

@@ -0,0 +1,584 @@
+/*
+  LzmaDecode.c
+  LZMA Decoder (optimized for Speed version)
+  
+  LZMA SDK 4.40 Copyright (c) 1999-2006 Igor Pavlov (2006-05-01)
+  http://www.7-zip.org/
+
+  LZMA SDK is licensed under two licenses:
+  1) GNU Lesser General Public License (GNU LGPL)
+  2) Common Public License (CPL)
+  It means that you can select one of these two licenses and 
+  follow rules of that license.
+
+  SPECIAL EXCEPTION:
+  Igor Pavlov, as the author of this Code, expressly permits you to 
+  statically or dynamically link your Code (or bind by name) to the 
+  interfaces of this file without subjecting your linked Code to the 
+  terms of the CPL or GNU LGPL. Any modifications or additions 
+  to this file, however, are subject to the LGPL or CPL terms.
+*/
+
+#include "LzmaDecode.h"
+
+#define kNumTopBits 24
+#define kTopValue ((UInt32)1 << kNumTopBits)
+
+#define kNumBitModelTotalBits 11
+#define kBitModelTotal (1 << kNumBitModelTotalBits)
+#define kNumMoveBits 5
+
+#define RC_READ_BYTE (*Buffer++)
+
+#define RC_INIT2 Code = 0; Range = 0xFFFFFFFF; \
+  { int i; for(i = 0; i < 5; i++) { RC_TEST; Code = (Code << 8) | RC_READ_BYTE; }}
+
+#ifdef _LZMA_IN_CB
+
+#define RC_TEST { if (Buffer == BufferLim) \
+  { SizeT size; int result = InCallback->Read(InCallback, &Buffer, &size); if (result != LZMA_RESULT_OK) return result; \
+  BufferLim = Buffer + size; if (size == 0) return LZMA_RESULT_DATA_ERROR; }}
+
+#define RC_INIT Buffer = BufferLim = 0; RC_INIT2
+
+#else
+
+#define RC_TEST { if (Buffer == BufferLim) return LZMA_RESULT_DATA_ERROR; }
+
+#define RC_INIT(buffer, bufferSize) Buffer = buffer; BufferLim = buffer + bufferSize; RC_INIT2
+ 
+#endif
+
+#define RC_NORMALIZE if (Range < kTopValue) { RC_TEST; Range <<= 8; Code = (Code << 8) | RC_READ_BYTE; }
+
+#define IfBit0(p) RC_NORMALIZE; bound = (Range >> kNumBitModelTotalBits) * *(p); if (Code < bound)
+#define UpdateBit0(p) Range = bound; *(p) += (kBitModelTotal - *(p)) >> kNumMoveBits;
+#define UpdateBit1(p) Range -= bound; Code -= bound; *(p) -= (*(p)) >> kNumMoveBits;
+
+#define RC_GET_BIT2(p, mi, A0, A1) IfBit0(p) \
+  { UpdateBit0(p); mi <<= 1; A0; } else \
+  { UpdateBit1(p); mi = (mi + mi) + 1; A1; } 
+  
+#define RC_GET_BIT(p, mi) RC_GET_BIT2(p, mi, ; , ;)               
+
+#define RangeDecoderBitTreeDecode(probs, numLevels, res) \
+  { int i = numLevels; res = 1; \
+  do { CProb *p = probs + res; RC_GET_BIT(p, res) } while(--i != 0); \
+  res -= (1 << numLevels); }
+
+
+#define kNumPosBitsMax 4
+#define kNumPosStatesMax (1 << kNumPosBitsMax)
+
+#define kLenNumLowBits 3
+#define kLenNumLowSymbols (1 << kLenNumLowBits)
+#define kLenNumMidBits 3
+#define kLenNumMidSymbols (1 << kLenNumMidBits)
+#define kLenNumHighBits 8
+#define kLenNumHighSymbols (1 << kLenNumHighBits)
+
+#define LenChoice 0
+#define LenChoice2 (LenChoice + 1)
+#define LenLow (LenChoice2 + 1)
+#define LenMid (LenLow + (kNumPosStatesMax << kLenNumLowBits))
+#define LenHigh (LenMid + (kNumPosStatesMax << kLenNumMidBits))
+#define kNumLenProbs (LenHigh + kLenNumHighSymbols) 
+
+
+#define kNumStates 12
+#define kNumLitStates 7
+
+#define kStartPosModelIndex 4
+#define kEndPosModelIndex 14
+#define kNumFullDistances (1 << (kEndPosModelIndex >> 1))
+
+#define kNumPosSlotBits 6
+#define kNumLenToPosStates 4
+
+#define kNumAlignBits 4
+#define kAlignTableSize (1 << kNumAlignBits)
+
+#define kMatchMinLen 2
+
+#define IsMatch 0
+#define IsRep (IsMatch + (kNumStates << kNumPosBitsMax))
+#define IsRepG0 (IsRep + kNumStates)
+#define IsRepG1 (IsRepG0 + kNumStates)
+#define IsRepG2 (IsRepG1 + kNumStates)
+#define IsRep0Long (IsRepG2 + kNumStates)
+#define PosSlot (IsRep0Long + (kNumStates << kNumPosBitsMax))
+#define SpecPos (PosSlot + (kNumLenToPosStates << kNumPosSlotBits))
+#define Align (SpecPos + kNumFullDistances - kEndPosModelIndex)
+#define LenCoder (Align + kAlignTableSize)
+#define RepLenCoder (LenCoder + kNumLenProbs)
+#define Literal (RepLenCoder + kNumLenProbs)
+
+#if Literal != LZMA_BASE_SIZE
+StopCompilingDueBUG
+#endif
+
+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size)
+{
+  unsigned char prop0;
+  if (size < LZMA_PROPERTIES_SIZE)
+    return LZMA_RESULT_DATA_ERROR;
+  prop0 = propsData[0];
+  if (prop0 >= (9 * 5 * 5))
+    return LZMA_RESULT_DATA_ERROR;
+  {
+    for (propsRes->pb = 0; prop0 >= (9 * 5); propsRes->pb++, prop0 -= (9 * 5));
+    for (propsRes->lp = 0; prop0 >= 9; propsRes->lp++, prop0 -= 9);
+    propsRes->lc = prop0;
+    /*
+    unsigned char remainder = (unsigned char)(prop0 / 9);
+    propsRes->lc = prop0 % 9;
+    propsRes->pb = remainder / 5;
+    propsRes->lp = remainder % 5;
+    */
+  }
+
+  #ifdef _LZMA_OUT_READ
+  {
+    int i;
+    propsRes->DictionarySize = 0;
+    for (i = 0; i < 4; i++)
+      propsRes->DictionarySize += (UInt32)(propsData[1 + i]) << (i * 8);
+    if (propsRes->DictionarySize == 0)
+      propsRes->DictionarySize = 1;
+  }
+  #endif
+  return LZMA_RESULT_OK;
+}
+
+#define kLzmaStreamWasFinishedId (-1)
+
+int LzmaDecode(CLzmaDecoderState *vs,
+    #ifdef _LZMA_IN_CB
+    ILzmaInCallback *InCallback,
+    #else
+    const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
+    #endif
+    unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed)
+{
+  CProb *p = vs->Probs;
+  SizeT nowPos = 0;
+  Byte previousByte = 0;
+  UInt32 posStateMask = (1 << (vs->Properties.pb)) - 1;
+  UInt32 literalPosMask = (1 << (vs->Properties.lp)) - 1;
+  int lc = vs->Properties.lc;
+
+  #ifdef _LZMA_OUT_READ
+  
+  UInt32 Range = vs->Range;
+  UInt32 Code = vs->Code;
+  #ifdef _LZMA_IN_CB
+  const Byte *Buffer = vs->Buffer;
+  const Byte *BufferLim = vs->BufferLim;
+  #else
+  const Byte *Buffer = inStream;
+  const Byte *BufferLim = inStream + inSize;
+  #endif
+  int state = vs->State;
+  UInt32 rep0 = vs->Reps[0], rep1 = vs->Reps[1], rep2 = vs->Reps[2], rep3 = vs->Reps[3];
+  int len = vs->RemainLen;
+  UInt32 globalPos = vs->GlobalPos;
+  UInt32 distanceLimit = vs->DistanceLimit;
+
+  Byte *dictionary = vs->Dictionary;
+  UInt32 dictionarySize = vs->Properties.DictionarySize;
+  UInt32 dictionaryPos = vs->DictionaryPos;
+
+  Byte tempDictionary[4];
+
+  #ifndef _LZMA_IN_CB
+  *inSizeProcessed = 0;
+  #endif
+  *outSizeProcessed = 0;
+  if (len == kLzmaStreamWasFinishedId)
+    return LZMA_RESULT_OK;
+
+  if (dictionarySize == 0)
+  {
+    dictionary = tempDictionary;
+    dictionarySize = 1;
+    tempDictionary[0] = vs->TempDictionary[0];
+  }
+
+  if (len == kLzmaNeedInitId)
+  {
+    {
+      UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
+      UInt32 i;
+      for (i = 0; i < numProbs; i++)
+        p[i] = kBitModelTotal >> 1; 
+      rep0 = rep1 = rep2 = rep3 = 1;
+      state = 0;
+      globalPos = 0;
+      distanceLimit = 0;
+      dictionaryPos = 0;
+      dictionary[dictionarySize - 1] = 0;
+      #ifdef _LZMA_IN_CB
+      RC_INIT;
+      #else
+      RC_INIT(inStream, inSize);
+      #endif
+    }
+    len = 0;
+  }
+  while(len != 0 && nowPos < outSize)
+  {
+    UInt32 pos = dictionaryPos - rep0;
+    if (pos >= dictionarySize)
+      pos += dictionarySize;
+    outStream[nowPos++] = dictionary[dictionaryPos] = dictionary[pos];
+    if (++dictionaryPos == dictionarySize)
+      dictionaryPos = 0;
+    len--;
+  }
+  if (dictionaryPos == 0)
+    previousByte = dictionary[dictionarySize - 1];
+  else
+    previousByte = dictionary[dictionaryPos - 1];
+
+  #else /* if !_LZMA_OUT_READ */
+
+  int state = 0;
+  UInt32 rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1;
+  int len = 0;
+  const Byte *Buffer;
+  const Byte *BufferLim;
+  UInt32 Range;
+  UInt32 Code;
+
+  #ifndef _LZMA_IN_CB
+  *inSizeProcessed = 0;
+  #endif
+  *outSizeProcessed = 0;
+
+  {
+    UInt32 i;
+    UInt32 numProbs = Literal + ((UInt32)LZMA_LIT_SIZE << (lc + vs->Properties.lp));
+    for (i = 0; i < numProbs; i++)
+      p[i] = kBitModelTotal >> 1;
+  }
+  
+  #ifdef _LZMA_IN_CB
+  RC_INIT;
+  #else
+  RC_INIT(inStream, inSize);
+  #endif
+
+  #endif /* _LZMA_OUT_READ */
+
+  while(nowPos < outSize)
+  {
+    CProb *prob;
+    UInt32 bound;
+    int posState = (int)(
+        (nowPos 
+        #ifdef _LZMA_OUT_READ
+        + globalPos
+        #endif
+        )
+        & posStateMask);
+
+    prob = p + IsMatch + (state << kNumPosBitsMax) + posState;
+    IfBit0(prob)
+    {
+      int symbol = 1;
+      UpdateBit0(prob)
+      prob = p + Literal + (LZMA_LIT_SIZE * 
+        (((
+        (nowPos 
+        #ifdef _LZMA_OUT_READ
+        + globalPos
+        #endif
+        )
+        & literalPosMask) << lc) + (previousByte >> (8 - lc))));
+
+      if (state >= kNumLitStates)
+      {
+        int matchByte;
+        #ifdef _LZMA_OUT_READ
+        UInt32 pos = dictionaryPos - rep0;
+        if (pos >= dictionarySize)
+          pos += dictionarySize;
+        matchByte = dictionary[pos];
+        #else
+        matchByte = outStream[nowPos - rep0];
+        #endif
+        do
+        {
+          int bit;
+          CProb *probLit;
+          matchByte <<= 1;
+          bit = (matchByte & 0x100);
+          probLit = prob + 0x100 + bit + symbol;
+          RC_GET_BIT2(probLit, symbol, if (bit != 0) break, if (bit == 0) break)
+        }
+        while (symbol < 0x100);
+      }
+      while (symbol < 0x100)
+      {
+        CProb *probLit = prob + symbol;
+        RC_GET_BIT(probLit, symbol)
+      }
+      previousByte = (Byte)symbol;
+
+      outStream[nowPos++] = previousByte;
+      #ifdef _LZMA_OUT_READ
+      if (distanceLimit < dictionarySize)
+        distanceLimit++;
+
+      dictionary[dictionaryPos] = previousByte;
+      if (++dictionaryPos == dictionarySize)
+        dictionaryPos = 0;
+      #endif
+      if (state < 4) state = 0;
+      else if (state < 10) state -= 3;
+      else state -= 6;
+    }
+    else             
+    {
+      UpdateBit1(prob);
+      prob = p + IsRep + state;
+      IfBit0(prob)
+      {
+        UpdateBit0(prob);
+        rep3 = rep2;
+        rep2 = rep1;
+        rep1 = rep0;
+        state = state < kNumLitStates ? 0 : 3;
+        prob = p + LenCoder;
+      }
+      else
+      {
+        UpdateBit1(prob);
+        prob = p + IsRepG0 + state;
+        IfBit0(prob)
+        {
+          UpdateBit0(prob);
+          prob = p + IsRep0Long + (state << kNumPosBitsMax) + posState;
+          IfBit0(prob)
+          {
+            #ifdef _LZMA_OUT_READ
+            UInt32 pos;
+            #endif
+            UpdateBit0(prob);
+            
+            #ifdef _LZMA_OUT_READ
+            if (distanceLimit == 0)
+            #else
+            if (nowPos == 0)
+            #endif
+              return LZMA_RESULT_DATA_ERROR;
+            
+            state = state < kNumLitStates ? 9 : 11;
+            #ifdef _LZMA_OUT_READ
+            pos = dictionaryPos - rep0;
+            if (pos >= dictionarySize)
+              pos += dictionarySize;
+            previousByte = dictionary[pos];
+            dictionary[dictionaryPos] = previousByte;
+            if (++dictionaryPos == dictionarySize)
+              dictionaryPos = 0;
+            #else
+            previousByte = outStream[nowPos - rep0];
+            #endif
+            outStream[nowPos++] = previousByte;
+            #ifdef _LZMA_OUT_READ
+            if (distanceLimit < dictionarySize)
+              distanceLimit++;
+            #endif
+
+            continue;
+          }
+          else
+          {
+            UpdateBit1(prob);
+          }
+        }
+        else
+        {
+          UInt32 distance;
+          UpdateBit1(prob);
+          prob = p + IsRepG1 + state;
+          IfBit0(prob)
+          {
+            UpdateBit0(prob);
+            distance = rep1;
+          }
+          else 
+          {
+            UpdateBit1(prob);
+            prob = p + IsRepG2 + state;
+            IfBit0(prob)
+            {
+              UpdateBit0(prob);
+              distance = rep2;
+            }
+            else
+            {
+              UpdateBit1(prob);
+              distance = rep3;
+              rep3 = rep2;
+            }
+            rep2 = rep1;
+          }
+          rep1 = rep0;
+          rep0 = distance;
+        }
+        state = state < kNumLitStates ? 8 : 11;
+        prob = p + RepLenCoder;
+      }
+      {
+        int numBits, offset;
+        CProb *probLen = prob + LenChoice;
+        IfBit0(probLen)
+        {
+          UpdateBit0(probLen);
+          probLen = prob + LenLow + (posState << kLenNumLowBits);
+          offset = 0;
+          numBits = kLenNumLowBits;
+        }
+        else
+        {
+          UpdateBit1(probLen);
+          probLen = prob + LenChoice2;
+          IfBit0(probLen)
+          {
+            UpdateBit0(probLen);
+            probLen = prob + LenMid + (posState << kLenNumMidBits);
+            offset = kLenNumLowSymbols;
+            numBits = kLenNumMidBits;
+          }
+          else
+          {
+            UpdateBit1(probLen);
+            probLen = prob + LenHigh;
+            offset = kLenNumLowSymbols + kLenNumMidSymbols;
+            numBits = kLenNumHighBits;
+          }
+        }
+        RangeDecoderBitTreeDecode(probLen, numBits, len);
+        len += offset;
+      }
+
+      if (state < 4)
+      {
+        int posSlot;
+        state += kNumLitStates;
+        prob = p + PosSlot +
+            ((len < kNumLenToPosStates ? len : kNumLenToPosStates - 1) << 
+            kNumPosSlotBits);
+        RangeDecoderBitTreeDecode(prob, kNumPosSlotBits, posSlot);
+        if (posSlot >= kStartPosModelIndex)
+        {
+          int numDirectBits = ((posSlot >> 1) - 1);
+          rep0 = (2 | ((UInt32)posSlot & 1));
+          if (posSlot < kEndPosModelIndex)
+          {
+            rep0 <<= numDirectBits;
+            prob = p + SpecPos + rep0 - posSlot - 1;
+          }
+          else
+          {
+            numDirectBits -= kNumAlignBits;
+            do
+            {
+              RC_NORMALIZE
+              Range >>= 1;
+              rep0 <<= 1;
+              if (Code >= Range)
+              {
+                Code -= Range;
+                rep0 |= 1;
+              }
+            }
+            while (--numDirectBits != 0);
+            prob = p + Align;
+            rep0 <<= kNumAlignBits;
+            numDirectBits = kNumAlignBits;
+          }
+          {
+            int i = 1;
+            int mi = 1;
+            do
+            {
+              CProb *prob3 = prob + mi;
+              RC_GET_BIT2(prob3, mi, ; , rep0 |= i);
+              i <<= 1;
+            }
+            while(--numDirectBits != 0);
+          }
+        }
+        else
+          rep0 = posSlot;
+        if (++rep0 == (UInt32)(0))
+        {
+          /* it's for stream version */
+          len = kLzmaStreamWasFinishedId;
+          break;
+        }
+      }
+
+      len += kMatchMinLen;
+      #ifdef _LZMA_OUT_READ
+      if (rep0 > distanceLimit) 
+      #else
+      if (rep0 > nowPos)
+      #endif
+        return LZMA_RESULT_DATA_ERROR;
+
+      #ifdef _LZMA_OUT_READ
+      if (dictionarySize - distanceLimit > (UInt32)len)
+        distanceLimit += len;
+      else
+        distanceLimit = dictionarySize;
+      #endif
+
+      do
+      {
+        #ifdef _LZMA_OUT_READ
+        UInt32 pos = dictionaryPos - rep0;
+        if (pos >= dictionarySize)
+          pos += dictionarySize;
+        previousByte = dictionary[pos];
+        dictionary[dictionaryPos] = previousByte;
+        if (++dictionaryPos == dictionarySize)
+          dictionaryPos = 0;
+        #else
+        previousByte = outStream[nowPos - rep0];
+        #endif
+        len--;
+        outStream[nowPos++] = previousByte;
+      }
+      while(len != 0 && nowPos < outSize);
+    }
+  }
+  RC_NORMALIZE;
+
+  #ifdef _LZMA_OUT_READ
+  vs->Range = Range;
+  vs->Code = Code;
+  vs->DictionaryPos = dictionaryPos;
+  vs->GlobalPos = globalPos + (UInt32)nowPos;
+  vs->DistanceLimit = distanceLimit;
+  vs->Reps[0] = rep0;
+  vs->Reps[1] = rep1;
+  vs->Reps[2] = rep2;
+  vs->Reps[3] = rep3;
+  vs->State = state;
+  vs->RemainLen = len;
+  vs->TempDictionary[0] = tempDictionary[0];
+  #endif
+
+  #ifdef _LZMA_IN_CB
+  vs->Buffer = Buffer;
+  vs->BufferLim = BufferLim;
+  #else
+  *inSizeProcessed = (SizeT)(Buffer - inStream);
+  #endif
+  *outSizeProcessed = nowPos;
+  return LZMA_RESULT_OK;
+}

source/sz/LzmaDecode.h

@@ -0,0 +1,113 @@
+/* 
+  LzmaDecode.h
+  LZMA Decoder interface
+
+  LZMA SDK 4.40 Copyright (c) 1999-2006 Igor Pavlov (2006-05-01)
+  http://www.7-zip.org/
+
+  LZMA SDK is licensed under two licenses:
+  1) GNU Lesser General Public License (GNU LGPL)
+  2) Common Public License (CPL)
+  It means that you can select one of these two licenses and 
+  follow rules of that license.
+
+  SPECIAL EXCEPTION:
+  Igor Pavlov, as the author of this code, expressly permits you to 
+  statically or dynamically link your code (or bind by name) to the 
+  interfaces of this file without subjecting your linked code to the 
+  terms of the CPL or GNU LGPL. Any modifications or additions 
+  to this file, however, are subject to the LGPL or CPL terms.
+*/
+
+#ifndef __LZMADECODE_H
+#define __LZMADECODE_H
+
+#include "LzmaTypes.h"
+
+/* #define _LZMA_IN_CB */
+/* Use callback for input data */
+
+/* #define _LZMA_OUT_READ */
+/* Use read function for output data */
+
+/* #define _LZMA_PROB32 */
+/* It can increase speed on some 32-bit CPUs, 
+   but memory usage will be doubled in that case */
+
+/* #define _LZMA_LOC_OPT */
+/* Enable local speed optimizations inside code */
+
+#ifdef _LZMA_PROB32
+#define CProb UInt32
+#else
+#define CProb UInt16
+#endif
+
+#define LZMA_RESULT_OK 0
+#define LZMA_RESULT_DATA_ERROR 1
+
+#ifdef _LZMA_IN_CB
+typedef struct _ILzmaInCallback
+{
+  int (*Read)(void *object, const unsigned char **buffer, SizeT *bufferSize);
+} ILzmaInCallback;
+#endif
+
+#define LZMA_BASE_SIZE 1846
+#define LZMA_LIT_SIZE 768
+
+#define LZMA_PROPERTIES_SIZE 5
+
+typedef struct _CLzmaProperties
+{
+  int lc;
+  int lp;
+  int pb;
+  #ifdef _LZMA_OUT_READ
+  UInt32 DictionarySize;
+  #endif
+}CLzmaProperties;
+
+int LzmaDecodeProperties(CLzmaProperties *propsRes, const unsigned char *propsData, int size);
+
+#define LzmaGetNumProbs(Properties) (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << ((Properties)->lc + (Properties)->lp)))
+
+#define kLzmaNeedInitId (-2)
+
+typedef struct _CLzmaDecoderState
+{
+  CLzmaProperties Properties;
+  CProb *Probs;
+
+  #ifdef _LZMA_IN_CB
+  const unsigned char *Buffer;
+  const unsigned char *BufferLim;
+  #endif
+
+  #ifdef _LZMA_OUT_READ
+  unsigned char *Dictionary;
+  UInt32 Range;
+  UInt32 Code;
+  UInt32 DictionaryPos;
+  UInt32 GlobalPos;
+  UInt32 DistanceLimit;
+  UInt32 Reps[4];
+  int State;
+  int RemainLen;
+  unsigned char TempDictionary[4];
+  #endif
+} CLzmaDecoderState;
+
+#ifdef _LZMA_OUT_READ
+#define LzmaDecoderInit(vs) { (vs)->RemainLen = kLzmaNeedInitId; }
+#endif
+
+int LzmaDecode(CLzmaDecoderState *vs,
+    #ifdef _LZMA_IN_CB
+    ILzmaInCallback *inCallback,
+    #else
+    const unsigned char *inStream, SizeT inSize, SizeT *inSizeProcessed,
+    #endif
+    unsigned char *outStream, SizeT outSize, SizeT *outSizeProcessed);
+
+#endif

source/sz/LzmaTypes.h

@@ -0,0 +1,45 @@
+/* 
+LzmaTypes.h 
+
+Types for LZMA Decoder
+
+This file written and distributed to public domain by Igor Pavlov.
+This file is part of LZMA SDK 4.40 (2006-05-01)
+*/
+
+#ifndef __LZMATYPES_H
+#define __LZMATYPES_H
+
+#ifndef _7ZIP_BYTE_DEFINED
+#define _7ZIP_BYTE_DEFINED
+typedef unsigned char Byte;
+#endif 
+
+#ifndef _7ZIP_UINT16_DEFINED
+#define _7ZIP_UINT16_DEFINED
+typedef unsigned short UInt16;
+#endif 
+
+#ifndef _7ZIP_UINT32_DEFINED
+#define _7ZIP_UINT32_DEFINED
+#ifdef _LZMA_UINT32_IS_ULONG
+typedef unsigned long UInt32;
+#else
+typedef unsigned int UInt32;
+#endif
+#endif 
+
+/* #define _LZMA_SYSTEM_SIZE_T */
+/* Use system's size_t. You can use it to enable 64-bit sizes supporting */
+
+#ifndef _7ZIP_SIZET_DEFINED
+#define _7ZIP_SIZET_DEFINED
+#ifdef _LZMA_SYSTEM_SIZE_T
+#include <stddef.h>
+typedef size_t SizeT;
+#else
+typedef UInt32 SizeT;
+#endif
+#endif
+
+#endif