Added ability to extract data from DIFF files

arm9/source/filesys/filetype.c

@@ -3,6 +3,7 @@
 #include "fatmbr.h"
 #include "nand.h"
 #include "game.h"
+#include "disadiff.h"
 #include "keydb.h"
 #include "ctrtransfer.h"
 #include "scripting.h"
@@ -11,6 +12,8 @@
 
 u64 IdentifyFileType(const char* path) {
     const u8 romfs_magic[] = { ROMFS_MAGIC };
+    const u8 diff_magic[] = { DIFF_MAGIC };
+    // const u8 disa_magic[] = { DISA_MAGIC };
     const u8 tickdb_magic[] = { TICKDB_MAGIC };
     const u8 smdh_magic[] = { SMDH_MAGIC };
     const u8 threedsx_magic[] = { THREEDSX_EXT_MAGIC };
@@ -88,8 +91,10 @@ u64 IdentifyFileType(const char* path) {
             return SYS_FIRM; // FIRM file
         } else if ((ValidateAgbSaveHeader((AgbSaveHeader*) data) == 0) && (fsize >= AGBSAVE_MAX_SIZE)) {
             return SYS_AGBSAVE; // AGBSAVE file
-        } else if (memcmp(header + 0x100, tickdb_magic, sizeof(tickdb_magic)) == 0) {
+        } else if (memcmp(header + 0x100, diff_magic, sizeof(diff_magic)) == 0) { // DIFF file
-            return SYS_TICKDB; // ticket.db
+            if (memcmp(header + 0x100, tickdb_magic, sizeof(tickdb_magic)) == 0) // ticket.db file
+                return SYS_DIFF | SYS_TICKDB; // ticket.db
+            return SYS_DIFF;
         } else if (memcmp(header, smdh_magic, sizeof(smdh_magic)) == 0) {
             return GAME_SMDH; // SMDH file
         } else if (ValidateTwlHeader((TwlHeader*) data) == 0) {

arm9/source/filesys/filetype.h

@@ -19,18 +19,20 @@
 #define GAME_GBA    (1ULL<<14)
 #define GAME_TAD    (1ULL<<15)
 #define SYS_FIRM    (1ULL<<16)
-#define SYS_AGBSAVE (1ULL<<17)
+#define SYS_DIFF    (1ULL<<17)
-#define SYS_TICKDB  (1ULL<<18)
+#define SYS_DISA    (1ULL<<18) // not yet used
-#define BIN_NCCHNFO (1ULL<<19)
+#define SYS_AGBSAVE (1ULL<<19)
-#define BIN_TIKDB   (1ULL<<20)
+#define SYS_TICKDB  (1ULL<<20)
-#define BIN_KEYDB   (1ULL<<21)
+#define BIN_NCCHNFO (1ULL<<21)
-#define BIN_LEGKEY  (1ULL<<22)
+#define BIN_TIKDB   (1ULL<<22)
-#define TXT_SCRIPT  (1ULL<<23)
+#define BIN_KEYDB   (1ULL<<23)
-#define TXT_GENERIC (1ULL<<24)
+#define BIN_LEGKEY  (1ULL<<24)
-#define GFX_PCX     (1ULL<<25)
+#define TXT_SCRIPT  (1ULL<<25)
-#define FONT_PBM    (1ULL<<26)
+#define TXT_GENERIC (1ULL<<26)
-#define NOIMG_NAND  (1ULL<<27)
+#define GFX_PCX     (1ULL<<27)
-#define HDR_NAND    (1ULL<<28)
+#define FONT_PBM    (1ULL<<28)
+#define NOIMG_NAND  (1ULL<<29)
+#define HDR_NAND    (1ULL<<30)
 #define TYPE_BASE   0xFFFFFFFFULL // 32 bit reserved for base types
 
 // #define FLAG_FIRM   (1ULL<<58) // <--- for CXIs containing FIRMs
@@ -54,6 +56,7 @@
 #define FTYPE_TRANSFERABLE(tp)  ((u64) (tp&(IMG_FAT|FLAG_CTR)) == (u64) (IMG_FAT|FLAG_CTR))
 #define FTYPE_NCSDFIXABLE(tp)   (tp&(HDR_NAND|NOIMG_NAND))
 #define FTYPE_HASCODE(tp)       ((u64) (tp&(GAME_NCCH|FLAG_CXI)) == (u64) (GAME_NCCH|FLAG_CXI))
+#define FTYPE_ISDISADIFF(tp)    (tp&(SYS_DIFF|SYS_DISA))
 #define FTYPE_RESTORABLE(tp)    (tp&(IMG_NAND))
 #define FTYPE_EBACKUP(tp)       (tp&(IMG_NAND))
 // #define FTYPE_XORPAD(tp)        (tp&(BIN_NCCHNFO)) // deprecated

arm9/source/godmode.c

@@ -9,6 +9,7 @@
 #include "virtual.h"
 #include "vcart.h"
 #include "game.h"
+#include "disadiff.h"
 #include "unittype.h"
 #include "entrypoints.h"
 #include "bootfirm.h"
@@ -1015,6 +1016,7 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
     bool transferable = (FTYPE_TRANSFERABLE(filetype) && IS_A9LH && (drvtype & DRV_FAT));
     bool hsinjectable = (FTYPE_HASCODE(filetype));
     bool extrcodeable = (FTYPE_HASCODE(filetype));
+    bool extrdiffable = (FTYPE_ISDISADIFF(filetype));
     bool restorable = (FTYPE_RESTORABLE(filetype) && IS_A9LH && !(drvtype & DRV_SYSNAND));
     bool ebackupable = (FTYPE_EBACKUP(filetype));
     bool ncsdfixable = (FTYPE_NCSDFIXABLE(filetype));
@@ -1038,7 +1040,7 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
         extrcodeable = (FTYPE_HASCODE(filetype_cxi));
     }
     
-    bool special_opt = mountable || verificable || decryptable || encryptable || cia_buildable || cia_buildable_legit || cxi_dumpable || tik_buildable || key_buildable || titleinfo || renamable || transferable || hsinjectable || restorable || xorpadable || ebackupable || ncsdfixable || extrcodeable || keyinitable || keyinstallable || bootable || scriptable || fontable || viewable || installable || agbexportable || agbimportable;
+    bool special_opt = mountable || verificable || decryptable || encryptable || cia_buildable || cia_buildable_legit || cxi_dumpable || tik_buildable || key_buildable || titleinfo || renamable || transferable || hsinjectable || restorable || xorpadable || ebackupable || ncsdfixable || extrcodeable || extrdiffable || keyinitable || keyinstallable || bootable || scriptable || fontable || viewable || installable || agbexportable || agbimportable;
     
     char pathstr[32+1];
     TruncateString(pathstr, file_path, 32, 8);
@@ -1082,7 +1084,8 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
         (filetype & GAME_3DSX)  ? "Show 3DSX title info"  :
         (filetype & SYS_FIRM  ) ? "FIRM image options..." :
         (filetype & SYS_AGBSAVE)? (agbimportable) ? "AGBSAVE options..." : "Dump GBA VC save" :
-        (filetype & SYS_TICKDB) ? (tik_buildable) ? "Ticket.db options..." : "Mount as ticket.db" :
+        (filetype & SYS_TICKDB) ? "Ticket.db options..."  :
+        (filetype & SYS_DIFF)   ? "Extract DIFF data"     :
         (filetype & BIN_TIKDB)  ? "Titlekey options..."   :
         (filetype & BIN_KEYDB)  ? "AESkeydb options..."   :
         (filetype & BIN_LEGKEY) ? "Build " KEYDB_NAME     :
@@ -1224,6 +1227,7 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
     int ctrtransfer = (transferable) ? ++n_opt : -1;
     int hsinject = (hsinjectable) ? ++n_opt : -1;
     int extrcode = (extrcodeable) ? ++n_opt : -1;
+    int extrdiff = (extrdiffable) ? ++n_opt : -1;
     int rename = (renamable) ? ++n_opt : -1;
     int xorpad = (xorpadable) ? ++n_opt : -1;
     int xorpad_inplace = (xorpadable) ? ++n_opt : -1;
@@ -1256,6 +1260,7 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
     if (xorpad > 0) optionstr[xorpad-1] = "Build XORpads (SD output)";
     if (xorpad_inplace > 0) optionstr[xorpad_inplace-1] = "Build XORpads (inplace)";
     if (extrcode > 0) optionstr[extrcode-1] = "Extract " EXEFS_CODE_NAME;
+    if (extrdiff > 0) optionstr[extrdiff-1] = "Extract DIFF data";
     if (keyinit > 0) optionstr[keyinit-1] = "Init " KEYDB_NAME;
     if (keyinstall > 0) optionstr[keyinstall-1] = "Install " KEYDB_NAME;
     if (install > 0) optionstr[install-1] = "Install FIRM";
@@ -1576,7 +1581,7 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
         }
         return 0;
     }
-    else if (user_select == extrcode) { // -> Extract code
+    else if ((user_select == extrcode) || (user_select == extrdiff)) { // -> Extract .code or DIFF partition
         if ((n_marked > 1) && ShowPrompt(true, "Try to extract all %lu selected files?", n_marked)) {
             u32 n_success = 0;
             u32 n_other = 0;
@@ -1591,19 +1596,29 @@ u32 FileHandlerMenu(char* current_path, u32* cursor, u32* scroll, PaneData** pan
                     continue;
                 }
                 DrawDirContents(current_dir, (*cursor = i), scroll);
-                if (filetype & GAME_TMD) {
+                if (filetype & SYS_DIFF) {
+                    if (ExtractDataFromDisaDiff(path) == 0) n_success++;
+                    else continue;
+                } else if (filetype & GAME_TMD) {
                     char cxi_pathl[256] = { 0 };
                     if ((GetTmdContentPath(cxi_pathl, path) == 0) && PathExist(cxi_pathl) && 
                         (ExtractCodeFromCxiFile(cxi_pathl, NULL, NULL) == 0)) {
                         n_success++;
-                    }
+                    } else continue;
-                } else if (ExtractCodeFromCxiFile(path, NULL, NULL) == 0) n_success++;
+                } else {
+                    if (ExtractCodeFromCxiFile(path, NULL, NULL) == 0) n_success++;
                     else continue;
+                }
                 current_dir->entry[i].marked = false;
             }
             if (n_other) ShowPrompt(false, "%lu/%lu files extracted ok\n%lu/%lu not of same type",
                 n_success, n_marked, n_other, n_marked);
             else ShowPrompt(false, "%lu/%lu files extracted ok", n_success, n_marked); 
+        } else if (filetype & SYS_DIFF) {
+            ShowString("%s\nExtracting data, please wait...", pathstr);
+            if (ExtractDataFromDisaDiff(file_path) == 0) {
+                ShowPrompt(false, "%s\ndata extracted to " OUTPUT_PATH, pathstr);
+            } else ShowPrompt(false, "%s\ndata extract failed", pathstr);
         } else {
             char extstr[8] = { 0 };
             ShowString("%s\nExtracting .code, please wait...", pathstr);

arm9/source/utils/gameutil.c

@@ -1574,6 +1574,66 @@ u32 ExtractCodeFromCxiFile(const char* path, const char* path_out, char* extstr)
     return 0;
 }
 
+u32 ExtractDataFromDisaDiff(const char* path) {
+    char dest[256];
+    u32 ret = 0;
+    
+    // build output name
+    char* name = strrchr(path, '/');
+    if (!name) return 1;
+    snprintf(dest, 256, "%s/%s", OUTPUT_PATH, ++name);
+    
+    // replace extension
+    char* dot = strrchr(dest, '.');
+    if (!dot || (dot < strrchr(dest, '/')))
+        dot = dest + strnlen(dest, 256);
+    snprintf(dot, 16, ".%s", "bin");
+        
+    if (!CheckWritePermissions(dest)) return 1;
+    
+    // prepare DISA / DIFF read
+    DisaDiffReaderInfo info;
+    u8* lvl2_cache = NULL;
+    if ((GetDisaDiffReaderInfo(path, &info, false) != 0) ||
+        !(lvl2_cache = (u8*) malloc(info.size_dpfs_lvl2)) ||
+        (BuildDisaDiffDpfsLvl2Cache(path, &info, lvl2_cache, info.size_dpfs_lvl2) != 0)) {
+        if (lvl2_cache) free(lvl2_cache);
+        return 1;
+    }
+    
+    // prepare buffer
+    u8* buffer = (u8*) malloc(STD_BUFFER_SIZE);
+    if (!buffer) {
+        free(lvl2_cache);
+        return 1;
+    }
+    
+    // open output file
+    FIL file;
+    if (fvx_open(&file, dest, FA_WRITE | FA_CREATE_ALWAYS) != FR_OK) {
+        free(buffer);
+        free(lvl2_cache);
+        return 1;
+    }
+    
+    // actually extract the partition
+    u32 total_size = 0;
+    for (u32 i = 0; ret == 0; i += STD_BUFFER_SIZE) {
+        UINT btr;
+        u32 add_size = ReadDisaDiffIvfcLvl4(path, &info, i, STD_BUFFER_SIZE, buffer);
+        if (!add_size) break;
+        if ((fvx_write(&file, buffer, add_size, &btr) != FR_OK) || (btr != add_size)) ret = 1;
+        total_size += add_size;
+    }
+    
+    // wrap it up
+    if (!total_size) ret = 1;
+    free(buffer);
+    free(lvl2_cache);
+    fvx_close(&file);
+    return ret;
+}
+
 u32 LoadSmdhFromGameFile(const char* path, Smdh* smdh) {
     u64 filetype = IdentifyFileType(path);
     

arm9/source/utils/gameutil.h

@@ -8,6 +8,7 @@ u32 CryptGameFile(const char* path, bool inplace, bool encrypt);
 u32 BuildCiaFromGameFile(const char* path, bool force_legit);
 u32 DumpCxiSrlFromTmdFile(const char* path);
 u32 ExtractCodeFromCxiFile(const char* path, const char* path_out, char* extstr);
+u32 ExtractDataFromDisaDiff(const char* path);
 u32 ShowGameFileTitleInfo(const char* path);
 u32 GetTmdContentPath(char* path_content, const char* path_tmd);
 u32 BuildNcchInfoXorpads(const char* destdir, const char* path);