api_hook.h

#ifndef API_HOOK
#define API_HOOK 

#include "render.h"
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>

/* Defined function pointer hooks to the render library API */
typedef Render*     (*fn_create_ctx)(Render*, int, int, const char*);
typedef int        (*fn_init_ctx)(Render*);
typedef void        (*fn_shutdown)(Render*);
typedef int        (*fn_pump_loop)(Render*);
typedef int        (*fn_draw)(Render*, int);
typedef unsigned long (*fn_time_ms)(void);
typedef int         (*fn_get_dim)(void);
typedef const char* (*fn_get_title)(void);
typedef uint32_t*   (*fn_alloc_fb)(Render*);

static void* dl(void* handle, const char* name) {
    dlerror();
    void* sym = dlsym(handle, name);
    const char* err = dlerror();
    if (!sym || err) {
        fprintf(stderr, "Failed to resolve symbol '%s': %s\n", name, err ? err : "unknown error");
        dlclose(handle);
        exit(EXIT_FAILURE);
    }
    return sym;
}

#endif // API_HOOK