Use purego #1
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Use purego #1
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- define Go structs mirroring C ADBC and Arrow C Data Interface memory layouts - include structs for schema, array, stream, error, database, connection, statement, partitions - add ADBC status codes and driver manager load flags - introduce purego dependency for foreign function interface compatibility
- add `loadDriverManagerLibrary` to dynamically load the ADBC driver manager shared library - utilize `purego` for platform-specific library loading (darwin, linux, windows) - allow overriding library path via `ADBC_DRIVER_MANAGER_LIB` environment variable - introduce `registerFunctions` as a placeholder for future ADBC function bindings
- register all adbc api functions for database, connection, statement, and error - support both adbc 1.0.0 and 1.1.0 specifications - utilize purego to dynamically load and bind c functions
- introduce utilities for converting between c and go strings - implement conversion from c adbcerror to go adbc.error - handle releasing c adbcerror resources - provide functions for allocating zeroed c arrow and adbcerror structs
- delete c++ implementation of adbc driver manager - remove direct cgo calls and cgo directives from go driver manager wrapper - update string options to use go byte slices instead of cgo char pointers - introduce explicit library loading for the driver manager shared library
- add nil checks to prevent panics when closing already released resources - nullify underlying C pointers after release to ensure proper state
- provide guidance on how to specify the library path - suggest using `ADBC_DRIVER_MANAGER_LIB` environment variable to resolve loading issues
- introduce `loadLibrary` function for platform-specific library loading - use `purego.Dlopen` for Unix-like systems (Linux, macOS) - use `syscall.LoadLibrary` for Windows - decouple `purego` import to platform-specific files
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