cfgsafe

cfgsafe is a specialized configuration engine for C99 that transforms a declarative schema into a strongly-typed, memory-safe single-header library. It eliminates the boilerplate and safety risks associated with manual configuration parsing in C.

Engineering Highlights

• AOT Strong Typing: The generator (cfg-gen) compiles your schema into a native C struct, providing compile-time type safety for all configuration fields.
• Safe Memory Model: Deeply nested strings and arrays are managed by an internal pool, allowing all allocated memory to be cleaned up with a single call.
• Layered Resolution: Automatically merges CLI arguments, environment variables, and INI files with strict, predictable precedence.
• Built-in Validation: Supports deep validation rules including numeric ranges, regex patterns, and file system checks.
• Security First: Automatically redacts fields marked as secret from debug logs and error messages.

Project Impact

By shifting configuration validation to the generator and semantic analysis phases, cfgsafe allows developers to focus on core logic while ensuring their system’s entry points are robust and secure against malformed input.