Added C Binding similar to ffish.js with dllbinding_usage.md #944
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| FSF_API int fsf_validate_fen(const char* fen, const char* variant, bool is960) { | ||
| return ffish::validate_fen(fen ? fen : "", variant ? variant : "chess", is960); | ||
| } | ||
| FSF_API const char* fsf_starting_fen(const char* variant) { | ||
| return to_cstr(ffish::starting_fen(variant ? variant : "chess")); |
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The C entry points that only query metadata (fsf_validate_fen, fsf_starting_fen, fsf_captures_to_hand) call ffish::starting_fen/validate_fen, which in turn dereference variants.find("chess")->second in get_variant without first ensuring variants.init() has run. If a client queries a starting FEN or validates a FEN before invoking fsf_init or creating a board—an expected first step when discovering available variants—the global map is still empty and this dereference is undefined and will crash. These functions should either call fsf_init (or check Board::sfInitialized) before touching variants.
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C Binding similar to ffish.js, no credits to me.
Used GPT-CODEX5.1-max to create it, for self use (basically a copy-paste of ffish.js to a C binding DLL)
Cheers 🥰