src/filesystem.cpp
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /** | ||
| 2 | * @file filesystem.cpp | ||
| 3 | * @brief Implementation of file system utilities. | ||
| 4 | * | ||
| 5 | * Provides functions for file system operations, such as retrieving the directory | ||
| 6 | * of the currently executing module. | ||
| 7 | */ | ||
| 8 | |||
| 9 | #include "DetourModKit/filesystem.hpp" | ||
| 10 | |||
| 11 | #include <windows.h> | ||
| 12 | #include <filesystem> | ||
| 13 | #include <iostream> | ||
| 14 | #include <stdexcept> | ||
| 15 | #include <string> | ||
| 16 | |||
| 17 | using namespace DetourModKit; | ||
| 18 | |||
| 19 | namespace | ||
| 20 | { | ||
| 21 | /** | ||
| 22 | * @brief Resolves the directory of the currently executing module. | ||
| 23 | * | ||
| 24 | * @details Called exactly once; the result is cached by the caller. | ||
| 25 | * Diagnostics are written to stderr rather than Logger because this | ||
| 26 | * function executes during Logger construction (via generate_log_file_path), | ||
| 27 | * and calling Logger::get_instance() here would deadlock on the magic-static | ||
| 28 | * guard that is already held by the in-progress Logger singleton init. | ||
| 29 | */ | ||
| 30 | 1 | std::string resolve_module_directory() | |
| 31 | { | ||
| 32 | 1 | HMODULE h_self_module = nullptr; | |
| 33 | 1 | wchar_t module_path_buffer[MAX_PATH] = {0}; | |
| 34 | 1 | std::string result_directory_path; | |
| 35 | |||
| 36 | try | ||
| 37 | { | ||
| 38 | // Use the address of the public function to locate the containing module (DLL or EXE). | ||
| 39 |
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1 | if (!GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, |
| 40 | reinterpret_cast<LPCWSTR>(&Filesystem::get_runtime_directory), | ||
| 41 |
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2 | &h_self_module) || |
| 42 |
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1 | h_self_module == nullptr) |
| 43 | { | ||
| 44 | ✗ | const DWORD last_error = GetLastError(); | |
| 45 | ✗ | throw std::runtime_error("GetModuleHandleExW failed to retrieve module handle. Error: " + std::to_string(last_error)); | |
| 46 | } | ||
| 47 | |||
| 48 |
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1 | const DWORD path_length = GetModuleFileNameW(h_self_module, module_path_buffer, MAX_PATH); |
| 49 |
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1 | if (path_length == 0) |
| 50 | { | ||
| 51 | ✗ | const DWORD last_error = GetLastError(); | |
| 52 | ✗ | throw std::runtime_error("GetModuleFileNameW failed to retrieve module path. Error: " + std::to_string(last_error)); | |
| 53 | } | ||
| 54 |
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1 | if (path_length >= MAX_PATH) |
| 55 | { | ||
| 56 | ✗ | throw std::runtime_error("GetModuleFileNameW failed: Path buffer was too small."); | |
| 57 | } | ||
| 58 | |||
| 59 |
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1 | const std::filesystem::path module_full_path(module_path_buffer); |
| 60 |
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1 | result_directory_path = module_full_path.parent_path().string(); |
| 61 | 1 | } | |
| 62 | ✗ | catch (const std::filesystem::filesystem_error &fs_err) | |
| 63 | { | ||
| 64 | ✗ | std::cerr << "[DMK Filesystem WARNING] Filesystem error: " << fs_err.what() | |
| 65 | ✗ | << ". Attempting to fall back to current working directory." << '\n'; | |
| 66 | ✗ | } | |
| 67 | ✗ | catch (const std::exception &e) | |
| 68 | { | ||
| 69 | ✗ | std::cerr << "[DMK Filesystem WARNING] Failed to determine module directory: " << e.what() | |
| 70 | ✗ | << ". Attempting to fall back to current working directory." << '\n'; | |
| 71 | ✗ | } | |
| 72 | |||
| 73 |
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1 | if (result_directory_path.empty()) |
| 74 | { | ||
| 75 | ✗ | wchar_t current_dir_buffer[MAX_PATH] = {0}; | |
| 76 | ✗ | if (GetCurrentDirectoryW(MAX_PATH, current_dir_buffer) > 0) | |
| 77 | { | ||
| 78 | ✗ | result_directory_path = std::filesystem::path(current_dir_buffer).string(); | |
| 79 | std::cerr << "[DMK Filesystem WARNING] Using current working directory as fallback: " | ||
| 80 | ✗ | << result_directory_path << '\n'; | |
| 81 | } | ||
| 82 | else | ||
| 83 | { | ||
| 84 | ✗ | const DWORD last_error = GetLastError(); | |
| 85 | ✗ | result_directory_path = "."; | |
| 86 | std::cerr << "[DMK Filesystem ERROR] Failed to get current working directory." | ||
| 87 | ✗ | << " Using relative path anchor '.'. Error: " << last_error << '\n'; | |
| 88 | } | ||
| 89 | } | ||
| 90 | 1 | return result_directory_path; | |
| 91 | ✗ | } | |
| 92 | } // anonymous namespace | ||
| 93 | |||
| 94 | 10083 | std::string DetourModKit::Filesystem::get_runtime_directory() | |
| 95 | { | ||
| 96 | // C++11 magic statics guarantee thread-safe, one-time initialization. | ||
| 97 | // The module directory never changes at runtime, so caching is safe. | ||
| 98 |
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10083 | static const std::string cached_directory = resolve_module_directory(); |
| 99 | 10083 | return cached_directory; | |
| 100 | } | ||
| 101 |