Rava/loader/loader.h

#ifndef RAVA_LOADER_H
#define RAVA_LOADER_H

#include <stddef.h>
#include <stdbool.h>
#include <stdint.h>

#define RAVA_MAX_NATIVE_METHODS 256
#define RAVA_MAX_NATIVE_LIBRARIES 32
#define RAVA_MAX_METHOD_PARAMS 16

typedef enum {
    RAVA_NATIVE_VOID,
    RAVA_NATIVE_INT,
    RAVA_NATIVE_LONG,
    RAVA_NATIVE_DOUBLE,
    RAVA_NATIVE_BOOLEAN,
    RAVA_NATIVE_STRING,
    RAVA_NATIVE_OBJECT,
    RAVA_NATIVE_ARRAY
} RavaNativeType_e;

typedef struct {
    RavaNativeType_e type;
    union {
        int32_t int_val;
        int64_t long_val;
        double double_val;
        bool bool_val;
        char *string_val;
        void *object_val;
        void *array_val;
    } data;
} RavaNativeValue_t;

typedef RavaNativeValue_t (*RavaNativeFunction_fn)(RavaNativeValue_t *args, size_t arg_count, void *user_data);

typedef struct {
    char *class_name;
    char *method_name;
    RavaNativeType_e return_type;
    RavaNativeType_e param_types[RAVA_MAX_METHOD_PARAMS];
    size_t param_count;
    RavaNativeFunction_fn function;
    void *user_data;
} RavaNativeMethod_t;

typedef struct {
    char *name;
    char *path;
    void *handle;
    RavaNativeMethod_t *methods;
    size_t method_count;
    size_t method_capacity;
} RavaNativeLibrary_t;

typedef struct {
    RavaNativeLibrary_t *libraries[RAVA_MAX_NATIVE_LIBRARIES];
    size_t library_count;
    RavaNativeMethod_t *method_cache[RAVA_MAX_NATIVE_METHODS];
    size_t cache_count;
} RavaNativeRegistry_t;

RavaNativeRegistry_t* rava_native_registry_create(void);
void rava_native_registry_destroy(RavaNativeRegistry_t *registry);

RavaNativeLibrary_t* rava_native_library_load(RavaNativeRegistry_t *registry, const char *path);
void rava_native_library_unload(RavaNativeRegistry_t *registry, RavaNativeLibrary_t *lib);

bool rava_native_register_method(RavaNativeRegistry_t *registry,
                                  const char *class_name,
                                  const char *method_name,
                                  RavaNativeType_e return_type,
                                  RavaNativeType_e *param_types,
                                  size_t param_count,
                                  RavaNativeFunction_fn function,
                                  void *user_data);

RavaNativeMethod_t* rava_native_find_method(RavaNativeRegistry_t *registry,
                                             const char *class_name,
                                             const char *method_name);

RavaNativeValue_t rava_native_invoke(RavaNativeMethod_t *method,
                                      RavaNativeValue_t *args,
                                      size_t arg_count);


RavaNativeValue_t rava_native_int(int32_t val);
RavaNativeValue_t rava_native_long(int64_t val);
RavaNativeValue_t rava_native_double(double val);
RavaNativeValue_t rava_native_boolean(bool val);
RavaNativeValue_t rava_native_string(const char *val);
RavaNativeValue_t rava_native_void(void);
RavaNativeValue_t rava_native_null(void);

typedef void (*RavaLibraryRegisterFn)(RavaNativeRegistry_t *registry);
#define RAVA_LIBRARY_REGISTER_SYMBOL "rava_library_register"

#endif