add UPS/IPS/PPF patch support

source/ngc/fileop.cpp

@@ -249,6 +249,15 @@ LoadFATSzFile(char * filepath, unsigned char * rbuffer)
  ***************************************************************************/
 int
 LoadBufferFromFAT (char *filepath, bool silent)
+{
+	return LoadBufferFromFAT((char *)savebuffer, filepath, silent);
+}
+
+/****************************************************************************
+ * Load buffer from FAT file
+ ***************************************************************************/
+int
+LoadBufferFromFAT (char * buffer, char *filepath, bool silent)
 {
     int size = 0;
 

source/ngc/fileop.h

@@ -27,6 +27,7 @@ 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);
+int LoadBufferFromFAT (char *buffer, char *filepath, bool silent);
 
 extern char currFATdir[MAXPATHLEN];
 extern FILE * fatfile;

source/ngc/filesel.h

@@ -13,7 +13,7 @@
 
 #include <unistd.h>
 
-#define SAVEBUFFERSIZE (512 * 1024)
+#define SAVEBUFFERSIZE (1024 * 1024 * 2)
 #define MAXJOLIET 255
 #define MAXDISPLAY 40
 

source/ngc/vbasupport.cpp

@@ -16,6 +16,7 @@
 #include "unzip.h"
 #include "Util.h"
 #include "Flash.h"
+#include "Patch.h"
 #include "Port.h"
 #include "RTC.h"
 #include "Sound.h"
@@ -589,6 +590,80 @@ static void ApplyPerImagePreferences()
 	}
 }
 
+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,ROMFilename);
+	sprintf(patchpath[1], "%s/%s.ups",currentdir,ROMFilename);
+	sprintf(patchpath[2], "%s/%s.ppf",currentdir,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);
+
+		if(cartridgeType == 1)
+		{
+			if(patchtype == 0)
+				patchApplyIPS(mf, &gbRom, &gbRomSize);
+			else if(patchtype == 1)
+				patchApplyUPS(mf, &gbRom, &gbRomSize);
+			else
+				patchApplyPPF(mf, &gbRom, &gbRomSize);
+		}
+		else
+		{
+			if(patchtype == 0)
+				patchApplyIPS(mf, &rom, &GBAROMSize);
+			else if(patchtype == 1)
+				patchApplyUPS(mf, &rom, &GBAROMSize);
+			else
+				patchApplyPPF(mf, &rom, &GBAROMSize);
+		}
+
+		memfclose(mf); // close memory file
+	}
+
+	FreeSaveBuffer ();
+}
+
 extern bool gbUpdateSizes();
 
 bool LoadGBROM(int method)
@@ -721,7 +796,7 @@ bool LoadVBAROM(int method)
 		// Setup GX
 		GX_Render_Init( srcWidth, srcHeight, hAspect, vAspect );
 
-		if ( cartridgeType == 1 )
+		if (cartridgeType == 1)
 		{
 			gbGetHardwareType();
 
@@ -729,7 +804,7 @@ bool LoadVBAROM(int method)
 			//if (gbHardware & 5)
 			//gbCPUInit(gbBiosFileName, useBios);
 
-			//applyPatch(patch, &gbRom, &size);
+			LoadPatch(method);
 
 			gbSoundReset();
 			gbSoundSetQuality(soundQuality);
@@ -752,7 +827,7 @@ bool LoadVBAROM(int method)
 			soundReset();
 			soundSetQuality(soundQuality);
 			CPUInit("BIOS.GBA", 1);
-			//applyPatch(patch, &gbRom, &size);
+			LoadPatch(method);
 			CPUReset();
 		}
 

source/ngc/vmmem.cpp

@@ -38,7 +38,7 @@ extern "C" {
 
 unsigned int MEM2Storage = 0x91000000;
 
-static u32 GBAROMSize = 0;
+int GBAROMSize = 0;
 
 #ifdef USE_VM
 //extern u32 loadtimeradjust;

source/ngc/vmmem.h

@@ -20,5 +20,7 @@ u16 VMRead16( u32 address );
 u8 VMRead8( u32 address );
 #endif
 
+extern int GBAROMSize;
+
 #endif
 

source/vba/Patch.cpp

@@ -0,0 +1,467 @@
+// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
+// Copyright (C) 1999-2003 Forgotten
+// Copyright (C) 2004-2006 Forgotten and the VBA development team
+// Copyright (C) 2007-2008 VBA-M development team and Shay Green
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2, or(at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software Foundation,
+// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <zlib.h>
+
+#include "System.h"
+#include "memfile.h"
+
+/*
+#ifdef __GNUC__
+typedef off64_t __off64_t;
+#endif
+*/
+#ifndef _MSC_VER
+#define _stricmp strcasecmp
+#endif // ! _MSC_VER
+
+#ifdef _MSC_VER
+#define fseeko64 _fseeki64
+#define ftello64 _ftelli64
+typedef	__int64 __off64_t;
+#endif
+
+#if defined(__APPLE__) || defined (MACOSX)
+#define	fseeko64 fseeko
+#define	ftello64 ftello
+typedef	off_t __off64_t;
+#endif /* __APPLE__ || MACOSX */
+
+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) {
+				size *= 2;
+				rom = (u8 *) realloc(rom, size);
+				*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;
+}
+
+bool applyPatch(const char *patchname, u8 **rom, int *size)
+{
+	bool result = false;
+
+	if (strlen(patchname) < 5)
+		return false;
+	const char * p = strrchr(patchname, '.');
+	if (p == NULL)
+		return false;
+
+	FILE *f = fopen(patchname, "rb");
+	if (!f)
+		return false;
+
+	// read in file
+	fseek(f, 0, SEEK_END); // go to end of file
+	int filesize = ftell(f); // get filesize
+	fseek(f, 0, SEEK_SET); // go to start of file
+	char * pbuffer = (char *) malloc(filesize);
+	fread (pbuffer, 1, filesize, f);
+	fclose(f);
+
+	MFILE * mf = memfopen(pbuffer, filesize); // create memory file
+
+	if (_stricmp(p, ".ips") == 0)
+		result = patchApplyIPS(mf, rom, size);
+	else if (_stricmp(p, ".ups") == 0)
+		result = patchApplyUPS(mf, rom, size);
+	else if (_stricmp(p, ".ppf") == 0)
+		result = patchApplyPPF(mf, rom, size);
+
+	memfclose(mf); // close memory file
+	free(pbuffer); // free buffer
+
+	return result;
+}

source/vba/Patch.h

@@ -0,0 +1,31 @@
+// -*- C++ -*-
+// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
+// Copyright (C) 1999-2003 Forgotten
+// Copyright (C) 2004 Forgotten and the VBA development team
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2, or(at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software Foundation,
+// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#ifndef VBA_PATCH_H
+#define VBA_PATCH_H
+
+#include "memfile.h"
+#include "System.h"
+
+bool applyPatch(const char *patchname, u8 **rom, int *size);
+bool patchApplyIPS(MFILE * f, u8 **r, int *s);
+bool patchApplyUPS(MFILE * f, u8 **rom, int *size);
+bool patchApplyPPF(MFILE *f, u8 **rom, int *size);
+
+#endif

source/vba/memfile.cpp

@@ -0,0 +1,132 @@
+/****************************************************************************
+ * 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
+ *
+ * Written By: Daryl Borth, October 2008
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ ***************************************************************************/
+#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/vba/memfile.h

@@ -0,0 +1,30 @@
+/****************************************************************************
+ * 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
+ *
+ * Written By: Daryl Borth, October 2008
+ *
+ * This code is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ ***************************************************************************/
+
+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);