From 1cf40e1082a97403385388304a0ade95138b928f Mon Sep 17 00:00:00 2001
From: Blu3train <frtempra@gmail.com>
Date: Fri, 21 Apr 2023 18:40:02 +0200
Subject: [PATCH 1/2] DMM engine hooks

---
 texthook/engine/engine.cc  | 97 ++++++++++++++++++++++++++++++++++++++
 texthook/engine/engine.h   |  2 +
 texthook/engine/match32.cc |  4 ++
 3 files changed, 103 insertions(+)

diff --git a/texthook/engine/engine.cc b/texthook/engine/engine.cc
index 61d5140..f282db9 100644
--- a/texthook/engine/engine.cc
+++ b/texthook/engine/engine.cc
@@ -21728,6 +21728,103 @@ bool InsertNamcoPS2Hook()
 }
 #endif // 0
 
+bool DmmFilter(LPVOID data, DWORD *size, HookParam *, BYTE)
+{
+  auto text = reinterpret_cast<LPSTR>(data);
+  auto len = reinterpret_cast<size_t *>(size);
+  StringCharReplacer(text, len, "\\n", 2, ' ');
+  StringCharReplacer(text, len, "\\k", 2, ' ');
+
+  if (cpp_strnstr(text, "{W", *len)) {
+    StringFilterBetween(text, len, "{", 1, "}", 1);
+  }
+  return true;
+}
+
+bool InsertDmm1Hook()
+{
+    //by Blu3train
+    /*
+    * Sample games:
+    * https://vndb.org/r76933
+    * https://vndb.org/v18717
+    */
+    bool found = false;
+    const BYTE pattern[] = {
+        0x8A, 0x02,
+        0x42,
+        0x84, 0xC0,
+        0x75, 0xF9,
+        0x2B, 0xD6,
+        0x8D, 0xBB, XX4,
+        0x8A, 0x47, 0x01,
+        0x47,
+        0x84, 0xC0,
+        0x75, 0xF8,
+        0x8B, 0xCA,
+        0xC1, 0xE9, 0x02,	// <--
+        0xF3, 0xA5,
+        0x8B, 0xCA
+    };
+  enum { addr_offset = 25 };
+
+    for (auto addr : Util::SearchMemory(pattern, sizeof(pattern), PAGE_EXECUTE, processStartAddress, processStopAddress))
+    {
+        HookParam hp = {};
+        hp.address = addr+addr_offset;
+        hp.offset = pusha_esi_off - 4;
+        hp.codepage = 65001;
+        hp.type = USING_STRING | NO_CONTEXT;
+		hp.filter_fun = DmmFilter;
+        ConsoleOutput("Textractor: INSERT DMM1");
+        NewHook(hp, "DMM1");
+        found = true;
+    }
+    if (!found) ConsoleOutput("Textractor:DMM1: pattern not found");
+    return found;
+}
+
+bool InsertDmm2Hook()
+{
+    //by Blu3train
+    /*
+    * Sample games:
+    * https://vndb.org/r76933
+    */
+    bool found = false;
+    const BYTE pattern[] = {
+        0x52,
+        0xFF, 0x71, 0x24,
+        0x50,
+        0xFF, 0xB7, 0x38, 0x02, 0x00, 0x00,
+        0xE8, 0x17, 0x66, 0xFF, 0xFF,
+        0x5F,     // <--
+        0xB0, 0x01,
+        0x5E,
+        0xC3,
+        0x51
+    };
+  enum { addr_offset = 16 };
+
+    for (auto addr : Util::SearchMemory(pattern, sizeof(pattern), PAGE_EXECUTE, processStartAddress, processStopAddress))
+    {
+        HookParam hp = {};
+        hp.address = addr+addr_offset;
+        hp.offset = pusha_ebp_off - 4;
+        hp.codepage = 65001;
+        hp.type = USING_STRING | NO_CONTEXT;
+		hp.filter_fun = DmmFilter;
+        ConsoleOutput("Textractor: INSERT DMM2");
+        NewHook(hp, "DMM2");
+        found = true;
+    }
+    if (!found) ConsoleOutput("Textractor:DMM2: pattern not found");
+    return found;
+}
+
+bool InsertDmmHooks()
+{ return InsertDmm1Hook() || InsertDmm2Hook();}
+
 } // namespace Engine
 
 // EOF
diff --git a/texthook/engine/engine.h b/texthook/engine/engine.h
index e8e401e..ff308d1 100644
--- a/texthook/engine/engine.h
+++ b/texthook/engine/engine.h
@@ -170,6 +170,8 @@ bool InsertWaffleHook();        // WAFFLE: cg.pak
 bool InsertCircusHook1();
 bool InsertCircusHook2();
 
+bool InsertDmmHooks();          // DMM: Data/Exi_UT2.sdat
+
 } // namespace Engine
 
 // EOF
diff --git a/texthook/engine/match32.cc b/texthook/engine/match32.cc
index fffc4c7..c27a881 100644
--- a/texthook/engine/match32.cc
+++ b/texthook/engine/match32.cc
@@ -370,6 +370,10 @@ bool DetermineEngineByFile3()
 
 bool DetermineEngineByFile4()
 {
+  if (Util::CheckFile(L"Data/Exi_UT2.sdat")) {
+    if (InsertDmmHooks())
+      return true;
+  }
   if (Util::CheckFile(L"EAGLS.dll")) { // jichi 3/24/2014: E.A.G.L.S
     //ConsoleOutput("vnreng: IGNORE EAGLS");
     InsertEaglsHook();

From 82a885102da464553da34e7b0fd9fb4b53f0b59c Mon Sep 17 00:00:00 2001
From: Blu3train <frtempra@gmail.com>
Date: Fri, 21 Apr 2023 23:22:15 +0200
Subject: [PATCH 2/2] DMM engine hooks fix

---
 texthook/engine/engine.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/texthook/engine/engine.cc b/texthook/engine/engine.cc
index f282db9..135f31b 100644
--- a/texthook/engine/engine.cc
+++ b/texthook/engine/engine.cc
@@ -21735,7 +21735,7 @@ bool DmmFilter(LPVOID data, DWORD *size, HookParam *, BYTE)
   StringCharReplacer(text, len, "\\n", 2, ' ');
   StringCharReplacer(text, len, "\\k", 2, ' ');
 
-  if (cpp_strnstr(text, "{W", *len)) {
+  if (cpp_strnstr(text, "{", *len)) {
     StringFilterBetween(text, len, "{", 1, "}", 1);
   }
   return true;