add IPS/UPS/PPF patch support

source/ngc/cheatmgr.h

@@ -9,3 +9,5 @@
  ***************************************************************************/
 
 void SetupCheats();
+
+extern SCheatData Cheat;

source/ngc/memfile.cpp

@@ -0,0 +1,131 @@
+/****************************************************************************
+ * Snes9x 1.51 Nintendo Wii/Gamecube Port
+ *
+ * Tantric October 2008
+ *
+ * memfile.cpp
+ *
+ * Memory-based replacement for standard C file functions
+ * This allows standard file calls to be replaced by memory based ones
+ * With little modification required to the code
+ ***************************************************************************/
+#include <string.h>
+#include <stdlib.h>
+
+#include "memfile.h"
+
+/****************************************************************************
+ * memfopen
+ * memory replacement for fopen
+ *
+ * Creates a memory-based file
+ ***************************************************************************/
+MFILE * memfopen(char * buffer, int size)
+{
+	MFILE *f = (MFILE *)malloc(sizeof(MFILE));
+
+	f->buffer = buffer;
+	f->offset = 0;
+	f->size = size;
+
+	return f;
+}
+
+/****************************************************************************
+ * memfclose
+ * memory replacement for fclose
+ *
+ * 'Closes' the memory file specified
+ ***************************************************************************/
+int memfclose(MFILE * src)
+{
+	free(src);
+	return 0;
+}
+
+/****************************************************************************
+ * memfseek
+ * memory replacement for fseek
+ *
+ * Sets the position indicator associated with the stream to a new position
+ * defined by adding offset to a reference position specified by origin.
+ ***************************************************************************/
+int memfseek ( MFILE * m, long int offset, int origin )
+{
+	int success = 0; // 0 indicates success
+
+	switch(origin)
+	{
+		case MSEEK_SET:
+			if(offset >= 0 && offset <= m->size)
+				m->offset = offset;
+			else
+				success = 1; // failure
+			break;
+		case MSEEK_CUR:
+			if((m->offset + offset) >= 0 && (m->offset + offset) <= m->size)
+				m->offset += offset;
+			else
+				success = 1; // failure
+			break;
+		case MSEEK_END:
+			if((m->size + offset) >= 0 && (m->size + offset) <= m->size)
+				m->offset = m->size + offset;
+			else
+				success = 1; // failure
+			break;
+	}
+	return success;
+}
+
+/****************************************************************************
+ * memftell
+ * memory replacement for ftell
+ *
+ * Get current position in stream (offset + 1)
+ ***************************************************************************/
+long int memftell (MFILE * stream)
+{
+	return stream->offset; // to emulate ftell behavior
+}
+
+/****************************************************************************
+ * memfread
+ * memory replacement for fread
+ *
+ * Reads an array of count elements, each one with a size of size bytes, from
+ * the buffer and stores them in the block of memory specified by ptr. The
+ * postion indicator of the buffer is advanced by the total amount of bytes
+ * read. The total amount of bytes read if successful is (size * count).
+ ***************************************************************************/
+size_t memfread(void * dst, size_t size, size_t count, MFILE * src)
+{
+	if(src->offset >= src->size) // reached end of buffer
+		return 0;
+
+	int numbytes = size*count;
+
+	if((src->offset + numbytes) > src->size) // can't read full # requested
+		numbytes = src->size - src->offset; // do a partial read
+
+	if(numbytes > 0)
+		memcpy(dst, src->buffer+src->offset, numbytes);
+
+	src->offset += numbytes;
+	return numbytes;
+}
+
+/****************************************************************************
+ * memfgetc
+ * memory replacement for fgetc
+ *
+ * Returns the next character in the buffer specified, and advances the
+ * postion indicator of the buffer by 1.
+ ***************************************************************************/
+int memfgetc(MFILE * src)
+{
+	if(src->offset >= src->size) // reached end of buffer
+		return MEOF;
+	else
+		return src->buffer[src->offset++];
+}

source/ngc/memfile.h

@@ -0,0 +1,34 @@
+/****************************************************************************
+ * Snes9x 1.51 Nintendo Wii/Gamecube Port
+ *
+ * Tantric October 2008
+ *
+ * memfile.h
+ *
+ * Memory-based replacement for standard C file functions
+ * This allows standard file calls to be replaced by memory based ones
+ * With little modification required to the code
+ ***************************************************************************/
+
+#ifndef _MEMFILE_H_
+#define _MEMFILE_H_
+
+typedef struct MFile {
+	char *buffer; // pointer to buffer memory
+	long int offset; // current position indicator in buffer
+	long int size; // total file (buffer) size
+} MFILE;
+
+#define MSEEK_SET	0
+#define MSEEK_CUR	1
+#define MSEEK_END	2
+#define MEOF		(-1)
+
+MFILE * memfopen(char * buffer, int size);
+int memfclose(MFILE * src);
+int memfseek ( MFILE * m, long int offset, int origin );
+long int memftell (MFILE * stream);
+size_t memfread(void * dst, size_t size, size_t count, MFILE * src);
+int memfgetc(MFILE * src);
+
+#endif

source/ngc/menu.cpp

@@ -54,23 +54,16 @@ extern "C" {
 #include "menudraw.h"
 #include "cheatmgr.h"
 #include "input.h"
-
-extern void DrawMenu (char items[][50], char *title, int maxitems, int selected, int fontsize);
-
-extern SCheatData Cheat;
-
-extern int menu;
-
-#define SOFTRESET_ADR ((volatile u32*)0xCC003024)
+#include "patch.h"
 
 /****************************************************************************
  * Reboot / Exit
  ***************************************************************************/
 
-#ifndef HW_RVL
-#define PSOSDLOADID 0x7c6000a6
-int *psoid = (int *) 0x80001800;
-void (*PSOReload) () = (void (*)()) 0x80001800;
+#ifdef HW_DOL
+	#define PSOSDLOADID 0x7c6000a6
+	int *psoid = (int *) 0x80001800;
+	void (*PSOReload) () = (void (*)()) 0x80001800;
 #endif
 
 void Reboot()
@@ -78,8 +71,8 @@ void Reboot()
 #ifdef HW_RVL
     SYS_ResetSystem(SYS_RETURNTOMENU, 0, 0);
 #else
-#define SOFTRESET_ADR ((volatile u32*)0xCC003024)
-    *SOFTRESET_ADR = 0x00000000;
+	#define SOFTRESET_ADR ((volatile u32*)0xCC003024)
+	*SOFTRESET_ADR = 0x00000000;
 #endif
 }
 
@@ -106,11 +99,12 @@ LoadManager ()
 {
 	int loadROM = OpenROM(GCSettings.LoadMethod);
 
-	/***
-	* check for autoloadsram / freeze
-	***/
-	if ( loadROM == 1 ) // if ROM was loaded, load the SRAM & settings
+	if (loadROM)
 	{
+		// load UPS/IPS/PPF patch
+		LoadPatch(GCSettings.LoadMethod);
+
+		// load SRAM or snapshot
 		if ( GCSettings.AutoLoad == 1 )
 			LoadSRAM(GCSettings.SaveMethod, SILENT);
 		else if ( GCSettings.AutoLoad == 2 )

source/ngc/menudraw.h

@@ -44,4 +44,6 @@ void ShowProgress (char *msg, int done, int total);
 void DrawPolygon (int vertices, int *varray, u8 r, u8 g, u8 b);
 void DrawLineFast( int startx, int endx, int y, u8 r, u8 g, u8 b );
 
+extern int menu;
+
 #endif

source/ngc/patch.cpp

@@ -0,0 +1,475 @@
+/****************************************************************************
+ * Snes9x 1.51 Nintendo Wii/Gamecube Port
+ *
+ * Tantric October 2008
+ *
+ * patch.cpp
+ *
+ * IPS/UPS/PPF patch support
+ ***************************************************************************/
+
+#include <zlib.h>
+
+#include "memmap.h"
+
+#include "snes9xGX.h"
+#include "menudraw.h"
+#include "fileop.h"
+#include "dvd.h"
+#include "smbop.h"
+#include "memfile.h"
+#include "filesel.h"
+
+static int readInt2(MFILE *f) {
+	int res = 0;
+	int c = memfgetc(f);
+	if (c == MEOF)
+		return -1;
+	res = c;
+	c = memfgetc(f);
+	if (c == MEOF)
+		return -1;
+	return c + (res << 8);
+}
+
+static int readInt3(MFILE *f) {
+	int res = 0;
+	int c = memfgetc(f);
+	if (c == MEOF)
+		return -1;
+	res = c;
+	c = memfgetc(f);
+	if (c == MEOF)
+		return -1;
+	res = c + (res << 8);
+	c = memfgetc(f);
+	if (c == MEOF)
+		return -1;
+	return c + (res << 8);
+}
+
+static s64 readInt4(MFILE *f) {
+	s64 tmp, res = 0;
+	int c;
+
+	for (int i = 0; i < 4; i++) {
+		c = memfgetc(f);
+		if (c == MEOF)
+			return -1;
+		tmp = c;
+		res = res + (tmp << (i * 8));
+	}
+
+	return res;
+}
+
+static s64 readInt8(MFILE *f) {
+	s64 tmp, res = 0;
+	int c;
+
+	for (int i = 0; i < 8; i++) {
+		c = memfgetc(f);
+		if (c == MEOF)
+			return -1;
+		tmp = c;
+		res = res + (tmp << (i * 8));
+	}
+
+	return res;
+}
+
+static s64 readVarPtr(MFILE *f) {
+	s64 offset = 0, shift = 1;
+	for (;;) {
+		int c = memfgetc(f);
+		if (c == MEOF)
+			return 0;
+		offset += (c & 0x7F) * shift;
+		if (c & 0x80)
+			break;
+		shift <<= 7;
+		offset += shift;
+	}
+	return offset;
+}
+
+#ifndef MIN
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+
+static uLong computePatchCRC(MFILE *f, unsigned int size) {
+	Bytef buf[4096];
+	long readed;
+
+	uLong crc = crc32(0L, Z_NULL, 0);
+	do {
+		readed = memfread(buf, 1, MIN(size, sizeof(buf)), f);
+		crc = crc32(crc, buf, readed);
+		size -= readed;
+	} while (readed > 0);
+
+	return crc;
+}
+
+bool patchApplyIPS(MFILE * f, u8 **r, int *s) {
+	// from the IPS spec at http://zerosoft.zophar.net/ips.htm
+
+	bool result = false;
+
+	u8 *rom = *r;
+	int size = *s;
+	if (memfgetc(f) == 'P' && memfgetc(f) == 'A' && memfgetc(f) == 'T'
+			&& memfgetc(f) == 'C' && memfgetc(f) == 'H') {
+		int b;
+		int offset;
+		int len;
+
+		result = true;
+
+		for (;;) {
+			// read offset
+			offset = readInt3(f);
+			// if offset == MEOF, end of patch
+			if (offset == 0x454f46 || offset == -1)
+				break;
+			// read length
+			len = readInt2(f);
+			if (!len) {
+				// len == 0, RLE block
+				len = readInt2(f);
+				// byte to fill
+				int c = memfgetc(f);
+				if (c == -1)
+					break;
+				b = (u8) c;
+			} else
+				b = -1;
+			// check if we need to reallocate our ROM
+			if ((offset + len) >= size) {
+#ifdef NGC
+				size = offset + len;
+#else
+				size *= 2;
+				rom = (u8 *) realloc(rom, size);
+#endif
+				*r = rom;
+				*s = size;
+			}
+			if (b == -1) {
+				// normal block, just read the data
+				if (memfread(&rom[offset], 1, len, f) != (size_t) len)
+					break;
+			} else {
+				// fill the region with the given byte
+				while (len--) {
+					rom[offset++] = b;
+				}
+			}
+		}
+	}
+	return result;
+}
+
+bool patchApplyUPS(MFILE * f, u8 **rom, int *size) {
+
+	s64 srcCRC, dstCRC, patchCRC;
+
+	memfseek(f, 0, MSEEK_END);
+	long int patchSize = memftell(f);
+	if (patchSize < 20) {
+		return false;
+	}
+
+	memfseek(f, 0, MSEEK_SET);
+
+	if (memfgetc(f) != 'U' || memfgetc(f) != 'P' || memfgetc(f) != 'S'
+			|| memfgetc(f) != '1') {
+		return false;
+	}
+
+	memfseek(f, -12, MSEEK_END);
+	srcCRC = readInt4(f);
+	dstCRC = readInt4(f);
+	patchCRC = readInt4(f);
+	if (srcCRC == -1 || dstCRC == -1 || patchCRC == -1) {
+		return false;
+	}
+
+	memfseek(f, 0, MSEEK_SET);
+	u32 crc = computePatchCRC(f, patchSize - 4);
+
+	if (crc != patchCRC) {
+		return false;
+	}
+
+	crc = crc32(0L, Z_NULL, 0);
+	crc = crc32(crc, *rom, *size);
+
+	memfseek(f, 4, MSEEK_SET);
+	s64 dataSize;
+	s64 srcSize = readVarPtr(f);
+	s64 dstSize = readVarPtr(f);
+
+	if (crc == srcCRC) {
+		dataSize = srcSize;
+	} else if (crc == dstCRC) {
+		dataSize = dstSize;
+	} else {
+		return false;
+	}
+	if (dataSize != *size) {
+		return false;
+	}
+
+	s64 relative = 0;
+	u8 *mem;
+	while (memftell(f) < patchSize - 12) {
+		relative += readVarPtr(f);
+		if (relative > dataSize)
+			continue;
+		mem = *rom + relative;
+		for (s64 i = relative; i < dataSize; i++) {
+			int x = memfgetc(f);
+			relative++;
+			if (!x)
+				break;
+			if (i < dataSize) {
+				*mem++ ^= x;
+			}
+		}
+	}
+	return true;
+}
+
+static int ppfVersion(MFILE *f) {
+	memfseek(f, 0, MSEEK_SET);
+	if (memfgetc(f) != 'P' || memfgetc(f) != 'P' || memfgetc(f) != 'F')
+		return 0;
+	switch (memfgetc(f)) {
+	case '1':
+		return 1;
+	case '2':
+		return 2;
+	case '3':
+		return 3;
+	default:
+		return 0;
+	}
+}
+
+int ppfFileIdLen(MFILE *f, int version) {
+	if (version == 2) {
+		memfseek(f, -8, MSEEK_END);
+	} else {
+		memfseek(f, -6, MSEEK_END);
+	}
+
+	if (memfgetc(f) != '.' || memfgetc(f) != 'D' || memfgetc(f) != 'I'
+			|| memfgetc(f) != 'Z')
+		return 0;
+
+	return (version == 2) ? readInt4(f) : readInt2(f);
+}
+
+static bool patchApplyPPF1(MFILE *f, u8 **rom, int *size) {
+	memfseek(f, 0, MSEEK_END);
+	int count = memftell(f);
+	if (count < 56)
+		return false;
+	count -= 56;
+
+	memfseek(f, 56, MSEEK_SET);
+
+	u8 *mem = *rom;
+
+	while (count > 0) {
+		int offset = readInt4(f);
+		if (offset == -1)
+			break;
+		int len = memfgetc(f);
+		if (len == MEOF)
+			break;
+		if (offset + len > *size)
+			break;
+		if (memfread(&mem[offset], 1, len, f) != (size_t) len)
+			break;
+		count -= 4 + 1 + len;
+	}
+
+	return (count == 0);
+}
+
+static bool patchApplyPPF2(MFILE *f, u8 **rom, int *size) {
+	memfseek(f, 0, MSEEK_END);
+	int count = memftell(f);
+	if (count < 56 + 4 + 1024)
+		return false;
+	count -= 56 + 4 + 1024;
+
+	memfseek(f, 56, MSEEK_SET);
+
+	int datalen = readInt4(f);
+	if (datalen != *size)
+		return false;
+
+	u8 *mem = *rom;
+
+	u8 block[1024];
+	memfread(&block, 1, 1024, f);
+	if (memcmp(&mem[0x9320], &block, 1024) != 0)
+		return false;
+
+	int idlen = ppfFileIdLen(f, 2);
+	if (idlen > 0)
+		count -= 16 + 16 + idlen;
+
+	memfseek(f, 56 + 4 + 1024, MSEEK_SET);
+
+	while (count > 0) {
+		int offset = readInt4(f);
+		if (offset == -1)
+			break;
+		int len = memfgetc(f);
+		if (len == MEOF)
+			break;
+		if (offset + len > *size)
+			break;
+		if (memfread(&mem[offset], 1, len, f) != (size_t) len)
+			break;
+		count -= 4 + 1 + len;
+	}
+
+	return (count == 0);
+}
+
+static bool patchApplyPPF3(MFILE *f, u8 **rom, int *size) {
+	memfseek(f, 0, MSEEK_END);
+	int count = memftell(f);
+	if (count < 56 + 4 + 1024)
+		return false;
+	count -= 56 + 4;
+
+	memfseek(f, 56, MSEEK_SET);
+
+	int imagetype = memfgetc(f);
+	int blockcheck = memfgetc(f);
+	int undo = memfgetc(f);
+	memfgetc(f);
+
+	u8 *mem = *rom;
+
+	if (blockcheck) {
+		u8 block[1024];
+		memfread(&block, 1, 1024, f);
+		if (memcmp(&mem[(imagetype == 0) ? 0x9320 : 0x80A0], &block, 1024) != 0)
+			return false;
+		count -= 1024;
+	}
+
+	int idlen = ppfFileIdLen(f, 2);
+	if (idlen > 0)
+		count -= 16 + 16 + idlen;
+
+	memfseek(f, 56 + 4 + (blockcheck ? 1024 : 0), MSEEK_SET);
+
+	while (count > 0) {
+		s64 offset = readInt8(f);
+		if (offset == -1)
+			break;
+		int len = memfgetc(f);
+		if (len == MEOF)
+			break;
+		if (offset + len > *size)
+			break;
+		if (memfread(&mem[offset], 1, len, f) != (size_t) len)
+			break;
+		if (undo)
+			memfseek(f, len, MSEEK_CUR);
+		count -= 8 + 1 + len;
+		if (undo)
+			count -= len;
+	}
+
+	return (count == 0);
+}
+
+bool patchApplyPPF(MFILE *f, u8 **rom, int *size)
+{
+	bool res = false;
+
+	int version = ppfVersion(f);
+	switch (version)
+	{
+		case 1: res = patchApplyPPF1(f, rom, size); break;
+		case 2: res = patchApplyPPF2(f, rom, size); break;
+		case 3: res = patchApplyPPF3(f, rom, size); break;
+	}
+
+	return res;
+}
+
+void LoadPatch(int method)
+{
+	int patchsize = 0;
+	int patchtype = -1;
+
+	AllocSaveBuffer ();
+
+	char patchpath[3][512];
+	memset(patchpath, 0, sizeof(patchpath));
+	sprintf(patchpath[0], "%s/%s.ips", currentdir, Memory.ROMFilename);
+	sprintf(patchpath[1], "%s/%s.ups", currentdir, Memory.ROMFilename);
+	sprintf(patchpath[2], "%s/%s.ppf", currentdir, Memory.ROMFilename);
+
+	ShowAction((char *)"Loading patch...");
+
+	switch (method)
+	{
+		case METHOD_SD:
+		case METHOD_USB:
+			for(int i=0; i<3; i++)
+			{
+				patchsize = LoadBufferFromFAT (patchpath[i], SILENT);
+
+				if(patchsize)
+				{
+					patchtype = i;
+					break;
+				}
+			}
+			break;
+
+		case METHOD_SMB:
+			for(int i=0; i<3; i++)
+			{
+				patchsize = LoadBufferFromSMB (patchpath[i], SILENT);
+
+				if(patchsize)
+				{
+					patchtype = i;
+					break;
+				}
+			}
+	}
+
+	if(patchsize > 0)
+	{
+		// create memory file
+		MFILE * mf = memfopen((char *)savebuffer, patchsize);
+
+		int tmpSize = SNESROMSize;
+
+		if(patchtype == 0)
+			patchApplyIPS(mf, &Memory.ROM, &tmpSize);
+		else if(patchtype == 1)
+			patchApplyUPS(mf, &Memory.ROM, &tmpSize);
+		else
+			patchApplyPPF(mf, &Memory.ROM, &tmpSize);
+
+		SNESROMSize = tmpSize;
+
+		memfclose(mf); // close memory file
+	}
+
+	FreeSaveBuffer ();
+}

source/ngc/patch.h

@@ -0,0 +1,18 @@
+/****************************************************************************
+ * Snes9x 1.51 Nintendo Wii/Gamecube Port
+ *
+ * Tantric October 2008
+ *
+ * patch.h
+ *
+ * IPS/UPS/PPF patch support
+ ***************************************************************************/
+
+#ifndef PATCH_H
+#define PATCH_H
+
+#include "memfile.h"
+
+void LoadPatch(int method);
+
+#endif

source/ngc/snes9xGX.cpp

@@ -180,6 +180,9 @@ emulate ()
 
 			MainMenu (2); // go to game menu
 
+			// save zoom level
+			SavePrefs(GCSettings.SaveMethod, SILENT);
+
 			FrameTimer = 0;
 			setFrameTimerMethod (); // set frametimer method every time a ROM is loaded