dim/sdk/c_cxx/dim_sdk.h

#ifndef _H_PLUG
#define _H_PLUG

#include <stdio.h>

#define BUF_SZ 2048

#ifdef _WIN32
#define PATH_SEP "\\"
#else
#define PATH_SEP "/"
#endif

typedef enum log_level_t {
    ERROR=1,
    WARN=2,
    INFO=3,
    DEBUG=4,
} log_level_t;

typedef struct plug_info_t {
    char* name;
    char* version;
    char* license;
} plug_info_t;

typedef struct plug_funcs_ctx_t {
    void (*log)(char* module, log_level_t level, char* s);
} plug_funcs_ctx_t;

typedef struct plug_ctx_t {
    char* config_dir;
    plug_funcs_ctx_t funcs;
    char* buf;
} plug_ctx_t;

typedef struct plug_msg_t {
    char* name;
    char* value;
} plug_msg_t;

// Functions defs
// User defined funcs
int  plug_init(plug_ctx_t*);             // Loads when DIM initialises
void* plug_pre_reload();                  // Return a pointer to save state
int  plug_post_reload(void*);            // returns the same pointer after reload
int  plug_on_msg(plug_msg_t*);           // Write the message to `buf` with max `size` characters 
int  plug_free();                        // Free everything before being killed

// Lib funcs
void setup_ctx(plug_ctx_t* ctx);
void _log(char* module, log_level_t level, char* s);


// Macros
#define PLUG_INFO(_name, _version, _license)                                                   \
static plug_info_t PLUG_INFO_VAR = { .name=(_name), .version=(_version), .license=(_license)}; \
void* plug_get_info() {                                                                        \
    return &PLUG_INFO_VAR;                                                                     \
}                                      

#define log(level, ...) do { \
    char* buf = (char*)malloc(BUF_SZ*sizeof(char));         \
    char* mod = (char*)malloc(BUF_SZ*sizeof(char));         \
    snprintf(mod, BUF_SZ*sizeof(char),                      \
            "(plug) %s/%s", PLUG_INFO_VAR.name, __FILE__); \
    snprintf(buf, BUF_SZ*sizeof(char), __VA_ARGS__);        \
    _log(mod, level, buf);                                  \
    free(buf);                                              \
    free(mod);                                              \
} while (0)

#ifdef PLUG_IMPL
static plug_ctx_t CTX = {0};

void setup_ctx(plug_ctx_t* ctx) {
    CTX = *ctx;
}

void _log(char* module, log_level_t level, char* s) {
    (CTX.funcs.log)(module, level, s);
}

#endif
#endif