Matrix Regedit [new] ◉

1. Introduction The Windows Registry is a hierarchical database used by Microsoft Windows to store low-level settings for the operating system and applications. While typically used for key-value pairs (strings, integers, binary blobs), it can also be leveraged to represent matrix structures (2D arrays) by employing systematic naming conventions, serialization techniques, or multi-key arrangements.

Example: 2×3 matrix of 32-bit floats (24 bytes data + 8 header = 32 bytes total).

[rows:4 bytes][cols:4 bytes][data: rows×cols × element_size] matrix regedit

RegSetValueExW(hKey, valueName, 0, REG_BINARY, buffer.data(), (DWORD)totalSize); RegCloseKey(hKey); Logical naming prevents collision and improves readability.

Write-Host "Matrix ($rowsRead x $colsRead): $matrix" #include <windows.h> #include <vector> #include <cstdint> void WriteBinaryMatrix(HKEY root, LPCWSTR subkey, LPCWSTR valueName, const std::vector<float>& data, uint32_t rows, uint32_t cols) HKEY hKey; RegCreateKeyExW(root, subkey, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE, NULL, &hKey, NULL); Example: 2×3 matrix of 32-bit floats (24 bytes

Each registry key represents a row, with values for columns.

size_t totalSize = 8 + data.size() * sizeof(float); std::vector<uint8_t> buffer(totalSize); memcpy(buffer.data(), &rows, 4); memcpy(buffer.data() + 4, &cols, 4); memcpy(buffer.data() + 8, data.data(), data.size() * sizeof(float)); size_t totalSize = 8 + data

HKEY_LOCAL_MACHINE\SOFTWARE\CompanyName\Product\Matrices ├── TransformMatrix │ Type = REG_SZ "binary" │ Data = REG_BINARY ... ├── LookupTable_3x4 │ Type = REG_SZ "json" │ Data = REG_SZ "..." └── UserPrefMatrix rows = REG_DWORD 5 cols = REG_DWORD 5 data_0_0 = REG_DWORD 1 ... | Method | Read Speed | Write Speed | Memory Overhead | Max Practical Size | |--------|------------|-------------|-----------------|--------------------| | Binary | Very fast | Fast | Low | ~1 MB (registry limit) | | JSON | Medium | Medium | Medium | 64 KB (REG_SZ limit) | | Row-per-key | Slow (many lookups) | Slow | High | Hundreds of keys |