From ba735b2993d5e2daa6fa7685e5fe2384db544764 Mon Sep 17 00:00:00 2001
From: ragnarok-clanker <ragnarok-clanker>
Date: Sat, 31 Oct 2026 16:02:15 +0000
Subject: [PATCH] Decompile fn_23499 (CSession::LoadMapPosTable)

Batch #8254 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_23499 CSession::LoadMapPosTable: logic confirmed by peer review

Peer-reviewed-by: Yommy, System4z, pedrao
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
---
 Source/Client/Session.h          |  22 ++++++-
 Source/Contents/MapNameTable.cpp | 106 +++++++++++++++++++++++++++++++
 2 files changed, 127 insertions(+), 1 deletion(-)

diff --git a/Source/Client/Session.h b/Source/Client/Session.h
index 2596cfdb..fc9c6cbc 100644
--- a/Source/Client/Session.h
+++ b/Source/Client/Session.h
@@ -54,6 +54,18 @@ struct AchievementRecordPacket {
 };
 #pragma pack(pop)
 
+struct MapPosRect {
+  /* 0000 */ int left;
+  /* 0004 */ int top;
+  /* 0008 */ int right;
+  /* 000C */ int bottom;
+};
+
+struct MapPosEntry {
+  /* 0000 */ MapPosRect rect;
+  /* 0010 */ int valid;
+};
+
 struct SessionRecord6178Entry {
   /* 0000 */ std::string unknown_0000;
   /* 0018 */ int unknown_0018;
@@ -305,7 +317,12 @@ public:
   /* 52C4 */ std::vector<const char*> m_robeNames;
   /* 52D0 */ std::vector<std::string> m_navigationForbiddenMaps;
   /* 52DC */ std::vector<std::pair<const char*, int>> m_commandOptions;
-  /* 52E8 */ unsigned char unknown_52E8[0x44];
+  /* 52E8 */ unsigned char unknown_52E8[0x28];
+  /* 5310 */ std::map<std::string, MapPosEntry> m_mapPositions;
+  /* 5318 */ std::map<std::string, MapPosEntry>* m_mapPosLists;
+  /* 531C */ std::map<int, MapPosEntry> m_mapPosBounds;
+  /* 5324 */ int unknown_5324;
+  /* 5328 */ int m_mapPosListCount;
   /* 532C */ int unknown_532C;
   /* 5330 */ int unknown_5330;
   /* 5334 */ int unknown_5334;
@@ -567,6 +584,7 @@ public:
   void LoadDamageSkinSettings();
   bool LoadExceptionMinimapNameTable();
   bool LoadMapNameTable();
+  bool LoadMapPosTable();
   bool LoadFogParameters();
   void ClearHomunStatus();
   std::pair<int, int>* InsertPair(int key, int value);
@@ -995,6 +1013,8 @@ static_assert(offsetof(SubChatWndInfo, x) == 0x34);
 static_assert(offsetof(CSession, m_noSubChatWnds) == 0x73C);
 static_assert(offsetof(CSession, m_subChatWnds) == 0x744);
 static_assert(offsetof(CSession, m_prohibitionLog) == 0x754);
+static_assert(offsetof(CSession, m_mapPositions) == 0x5310);
+static_assert(offsetof(CSession, m_mapPosListCount) == 0x5328);
 static_assert(offsetof(SessionRecord6144, unknown_002C) == 0x2C);
 static_assert(offsetof(SessionRecord6144, unknown_0030) == 0x30);
 static_assert(offsetof(CSession, m_additionalSkills) == 0x4);
diff --git a/Source/Contents/MapNameTable.cpp b/Source/Contents/MapNameTable.cpp
index 98000ea2..a7a977c4 100644
--- a/Source/Contents/MapNameTable.cpp
+++ b/Source/Contents/MapNameTable.cpp
@@ -7,6 +7,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <cstdlib>
 #include <string>
 #include <vector>
 
@@ -85,3 +86,108 @@ bool CSession::LoadMapNameTable() {
 
   return loaded;
 }
+
+// OFFSET: 0x00DE8970
+// FUNCTION: fn_23499
+bool CSession::LoadMapPosTable() {
+  this->m_mapPosLists = nullptr;
+  this->m_mapPositions.clear();
+  this->m_mapPosBounds.clear();
+
+  CFile file;
+  if (!file.Open("mapPosTable.txt", 0, true, false)) {
+    return false;
+  }
+
+  const char* cursor = static_cast<const char*>(file.GetData());
+  const char* end = cursor + file.GetSize();
+  int currentId = 0;
+  std::string name;
+  std::vector<std::string> fields;
+  std::string token;
+  int boundsValid = 0;
+  MapPosRect bounds = {};
+  const char* start = cursor;
+  for (; cursor < end; ++cursor) {
+    switch (*cursor) {
+    case '\n':
+    case '\r':
+      start = cursor + 1;
+      break;
+    case '@':
+      if (this->m_mapPosListCount == -1) {
+        this->m_mapPosListCount = std::atoi(std::string(start, cursor).c_str());
+        this->m_mapPosLists = new std::map<std::string, MapPosEntry>[this->m_mapPosListCount];
+      }
+      break;
+    case '#':
+      if (token.size() == 0) {
+        token.assign(start, cursor - start);
+        const int id = std::atoi(std::string(start, cursor).c_str());
+        if (currentId != id && boundsValid != 0) {
+          MapPosEntry& entry = this->m_mapPosBounds[currentId];
+          entry.rect = bounds;
+          entry.valid = boundsValid;
+          bounds = {};
+          boundsValid = 0;
+          currentId = id;
+        }
+      } else if (name.size() == 0) {
+        name.assign(start, cursor - start);
+      } else if (fields.size() < 3) {
+        fields.push_back(std::string(start, cursor));
+      } else {
+        const std::string last(start, cursor);
+        fields.push_back(last);
+        const int bottom = std::atoi(fields[3].c_str());
+        const int right = std::atoi(fields[2].c_str());
+        const int top = std::atoi(fields[1].c_str());
+        MapPosRect rect;
+        rect.left = std::atoi(fields[0].c_str());
+        rect.top = top;
+        rect.right = right;
+        rect.bottom = bottom;
+
+        MapPosEntry& listed = this->m_mapPosLists[currentId][name];
+        listed.rect = rect;
+        listed.valid = 1;
+        MapPosEntry& position = this->m_mapPositions[name];
+        position.rect = rect;
+        position.valid = 1;
+
+        if (boundsValid == 0) {
+          bounds = rect;
+          boundsValid = 1;
+        } else {
+          if (bounds.right < right) {
+            bounds.right = right;
+          }
+          if (bounds.bottom < bottom) {
+            bounds.bottom = bottom;
+          }
+          if (rect.left < bounds.left) {
+            bounds.left = rect.left;
+          }
+          if (top < bounds.top) {
+            bounds.top = top;
+          }
+        }
+
+        token.clear();
+        name.clear();
+        fields.clear();
+      }
+      start = cursor + 1;
+      break;
+    }
+  }
+
+  if (boundsValid != 0) {
+    MapPosEntry& entry = this->m_mapPosBounds[currentId];
+    entry.rect = bounds;
+    entry.valid = boundsValid;
+  }
+
+  file.Close();
+  return true;
+}