1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
#include "pch.h"
#include "filesystem.h"
#include "hooks.h"
#include "hookutils.h"
#include "sourceinterface.h"
#include "modmanager.h"
#include <iostream>
#include <sstream>
using namespace R2FS;
bool bReadingOriginalFile = false;
std::string sCurrentModPath;
ConVar* Cvar_ns_fs_log_reads;
namespace R2FS
{
std::string ReadVPKFile(const char* path)
{
// read scripts.rson file, todo: check if this can be overwritten
FileHandle_t fileHandle = (*g_pFilesystem)->m_vtable2->Open(&(*g_pFilesystem)->m_vtable2, path, "rb", "GAME", 0);
std::stringstream fileStream;
int bytesRead = 0;
char data[4096];
do
{
bytesRead = (*g_pFilesystem)->m_vtable2->Read(&(*g_pFilesystem)->m_vtable2, data, (int)std::size(data), fileHandle);
fileStream.write(data, bytesRead);
} while (bytesRead == std::size(data));
(*g_pFilesystem)->m_vtable2->Close(*g_pFilesystem, fileHandle);
return fileStream.str();
}
std::string ReadVPKOriginalFile(const char* path)
{
bReadingOriginalFile = true;
std::string ret = ReadVPKFile(path);
bReadingOriginalFile = false;
return ret;
}
SourceInterface<IFileSystem>* g_pFilesystem;
}
typedef void (*AddSearchPathType)(IFileSystem* fileSystem, const char* pPath, const char* pathID, SearchPathAdd_t addType);
AddSearchPathType AddSearchPath;
void AddSearchPathHook(IFileSystem* fileSystem, const char* pPath, const char* pathID, SearchPathAdd_t addType)
{
AddSearchPath(fileSystem, pPath, pathID, addType);
// make sure current mod paths are at head
if (!strcmp(pathID, "GAME") && sCurrentModPath.compare(pPath) && addType == PATH_ADD_TO_HEAD)
{
AddSearchPath(fileSystem, sCurrentModPath.c_str(), "GAME", PATH_ADD_TO_HEAD);
AddSearchPath(fileSystem, GetCompiledAssetsPath().string().c_str(), "GAME", PATH_ADD_TO_HEAD);
}
}
void SetNewModSearchPaths(Mod* mod)
{
// put our new path to the head if we need to read from a different mod path
// in the future we could also determine whether the file we're setting paths for needs a mod dir, or compiled assets
if (mod != nullptr)
{
if ((fs::absolute(mod->ModDirectory) / MOD_OVERRIDE_DIR).string().compare(sCurrentModPath))
{
spdlog::info("changing mod search path from {} to {}", sCurrentModPath, mod->ModDirectory.string());
AddSearchPath(
&*(*g_pFilesystem), (fs::absolute(mod->ModDirectory) / MOD_OVERRIDE_DIR).string().c_str(), "GAME", PATH_ADD_TO_HEAD);
sCurrentModPath = (fs::absolute(mod->ModDirectory) / MOD_OVERRIDE_DIR).string();
}
}
else // push compiled to head
AddSearchPath(&*(*g_pFilesystem), fs::absolute(GetCompiledAssetsPath()).string().c_str(), "GAME", PATH_ADD_TO_HEAD);
}
bool TryReplaceFile(const char* pPath, bool shouldCompile)
{
if (bReadingOriginalFile)
return false;
if (shouldCompile)
g_pModManager->CompileAssetsForFile(pPath);
// idk how efficient the lexically normal check is
// can't just set all /s in path to \, since some paths aren't in writeable memory
auto file = g_pModManager->m_modFiles.find(g_pModManager->NormaliseModFilePath(fs::path(pPath)));
if (file != g_pModManager->m_modFiles.end())
{
SetNewModSearchPaths(file->second.owningMod);
return true;
}
return false;
}
// force modded files to be read from mods, not cache
typedef bool (*ReadFromCacheType)(IFileSystem* filesystem, char* path, void* result);
ReadFromCacheType ReadFromCache;
bool ReadFromCacheHook(IFileSystem* filesystem, char* pPath, void* result)
{
if (TryReplaceFile(pPath, true))
return false;
return ReadFromCache(filesystem, pPath, result);
}
// force modded files to be read from mods, not vpk
typedef FileHandle_t (*ReadFileFromVPKType)(VPKData* vpkInfo, __int64* b, char* filename);
ReadFileFromVPKType ReadFileFromVPK;
FileHandle_t ReadFileFromVPKHook(VPKData* vpkInfo, __int64* b, char* filename)
{
// don't compile here because this is only ever called from OpenEx, which already compiles
if (TryReplaceFile(filename, false))
{
*b = -1;
return b;
}
return ReadFileFromVPK(vpkInfo, b, filename);
}
typedef FileHandle_t (*CBaseFileSystem__OpenExType)(
IFileSystem* filesystem, const char* pPath, const char* pOptions, uint32_t flags, const char* pPathID, char** ppszResolvedFilename);
CBaseFileSystem__OpenExType CBaseFileSystem__OpenEx;
FileHandle_t CBaseFileSystem__OpenExHook(IFileSystem* filesystem, const char* pPath, const char* pOptions, uint32_t flags, const char* pPathID, char **ppszResolvedFilename)
{
TryReplaceFile(pPath, true);
return CBaseFileSystem__OpenEx(filesystem, pPath, pOptions, flags, pPathID, ppszResolvedFilename);
}
typedef VPKData* (*MountVPKType)(IFileSystem* fileSystem, const char* vpkPath);
MountVPKType MountVPK;
VPKData* MountVPKHook(IFileSystem* fileSystem, const char* vpkPath)
{
spdlog::info("MountVPK {}", vpkPath);
VPKData* ret = MountVPK(fileSystem, vpkPath);
for (Mod mod : g_pModManager->m_loadedMods)
{
if (!mod.Enabled)
continue;
for (ModVPKEntry& vpkEntry : mod.Vpks)
{
// if we're autoloading, just load no matter what
if (!vpkEntry.m_bAutoLoad)
{
// resolve vpk name and try to load one with the same name
// todo: we should be unloading these on map unload manually
std::string mapName(fs::path(vpkPath).filename().string());
std::string modMapName(fs::path(vpkEntry.m_sVpkPath.c_str()).filename().string());
if (mapName.compare(modMapName))
continue;
}
VPKData* loaded = MountVPK(fileSystem, vpkEntry.m_sVpkPath.c_str());
if (!ret) // this is primarily for map vpks and stuff, so the map's vpk is what gets returned from here
ret = loaded;
}
}
return ret;
}
ON_DLL_LOAD("filesystem_stdio.dll", Filesystem, [](HMODULE baseAddress)
{
R2FS::g_pFilesystem = new SourceInterface<IFileSystem>("filesystem_stdio.dll", "VFileSystem017");
// create hooks
HookEnabler hook;
ENABLER_CREATEHOOK(hook, (*g_pFilesystem)->m_vtable->ReadFromCache, &ReadFromCacheHook, reinterpret_cast<LPVOID*>(&ReadFromCache));
ENABLER_CREATEHOOK(hook, (char*)baseAddress + 0x5CBA0, &ReadFileFromVPKHook, reinterpret_cast<LPVOID*>(&ReadFileFromVPK));
ENABLER_CREATEHOOK(
hook, (char*)baseAddress + 0x15F50, &CBaseFileSystem__OpenExHook, reinterpret_cast<LPVOID*>(&CBaseFileSystem__OpenEx));
ENABLER_CREATEHOOK(hook, (*g_pFilesystem)->m_vtable->AddSearchPath, &AddSearchPathHook, reinterpret_cast<LPVOID*>(&AddSearchPath));
ENABLER_CREATEHOOK(hook, (*g_pFilesystem)->m_vtable->MountVPK, &MountVPKHook, reinterpret_cast<LPVOID*>(&MountVPK));
})
|
