local ffi = require'ffi'
require'libcrypto_types_h'
ffi.cdef[[
typedef struct FILE FILE;

typedef struct {
    char *section;
    char *name;
    char *value;
} CONF_VALUE;

struct conf_st;
struct conf_method_st;
typedef struct conf_method_st CONF_METHOD;

struct conf_method_st {
    const char *name;
    CONF *(*create) (CONF_METHOD *meth);
    int (*init) (CONF *conf);
    int (*destroy) (CONF *conf);
    int (*destroy_data) (CONF *conf);
    int (*load_bio) (CONF *conf, BIO *bp, long *eline);
    int (*dump) (const CONF *conf, BIO *bp);
    int (*is_number) (const CONF *conf, char c);
    int (*to_int) (const CONF *conf, char c);
    int (*load) (CONF *conf, const char *name, long *eline);
};

typedef struct conf_imodule_st CONF_IMODULE;
typedef struct conf_module_st CONF_MODULE;

typedef int conf_init_func (CONF_IMODULE *md, const CONF *cnf);
typedef void conf_finish_func (CONF_IMODULE *md);

enum {
    CONF_MFLAGS_IGNORE_ERRORS       = 0x1,
    CONF_MFLAGS_IGNORE_RETURN_CODES = 0x2,
    CONF_MFLAGS_SILENT              = 0x4,
    CONF_MFLAGS_NO_DSO              = 0x8,
    CONF_MFLAGS_IGNORE_MISSING_FILE = 0x10,
    CONF_MFLAGS_DEFAULT_SECTION     = 0x20,
};

int CONF_set_default_method(CONF_METHOD *meth);
void CONF_set_nconf(CONF *conf, struct lhash_st_CONF_VALUE *hash);
struct lhash_st_CONF_VALUE *CONF_load(struct lhash_st_CONF_VALUE *conf, const char *file, long *eline);
struct lhash_st_CONF_VALUE *CONF_load_fp(struct lhash_st_CONF_VALUE *conf, FILE *fp, long *eline);
struct lhash_st_CONF_VALUE *CONF_load_bio(struct lhash_st_CONF_VALUE *conf, BIO *bp, long *eline);
struct lhash_st_CONF_VALUE *CONF_get_section(struct lhash_st_CONF_VALUE *conf, const char *section);
char *CONF_get_string(struct lhash_st_CONF_VALUE *conf, const char *group, const char *name);
long CONF_get_number(struct lhash_st_CONF_VALUE *conf, const char *group, const char *name);
void CONF_free(struct lhash_st_CONF_VALUE *conf);
int CONF_dump_fp(struct lhash_st_CONF_VALUE *conf, FILE *out);
int CONF_dump_bio(struct lhash_st_CONF_VALUE *conf, BIO *out);
void OPENSSL_config(const char *config_name);

/*
 * New conf code.  The semantics are different from the functions above. If
 * that wasn't the case, the above functions would have been replaced
 */

struct conf_st {
    CONF_METHOD *meth;
    void *meth_data;
    struct lhash_st_CONF_VALUE *data;
};

CONF *NCONF_new(CONF_METHOD *meth);
CONF_METHOD *NCONF_default(void);
CONF_METHOD *NCONF_WIN32(void);
void NCONF_free(CONF *conf);
void NCONF_free_data(CONF *conf);

int NCONF_load(CONF *conf, const char *file, long *eline);
int NCONF_load_fp(CONF *conf, FILE *fp, long *eline);
int NCONF_load_bio(CONF *conf, BIO *bp, long *eline);
struct stack_st_CONF_VALUE *NCONF_get_section(const CONF *conf, const char *section);
char *NCONF_get_string(const CONF *conf, const char *group, const char *name);
int NCONF_get_number_e(const CONF *conf, const char *group, const char *name, long *result);
int NCONF_dump_fp(const CONF *conf, FILE *out);
int NCONF_dump_bio(const CONF *conf, BIO *out);

/* Module functions */

int CONF_modules_load(const CONF *cnf, const char *appname, unsigned long flags);
int CONF_modules_load_file(const char *filename, const char *appname, unsigned long flags);
void CONF_modules_unload(int all);
void CONF_modules_finish(void);
int CONF_module_add(const char *name, conf_init_func *ifunc, conf_finish_func *ffunc);
const char *CONF_imodule_get_name(const CONF_IMODULE *md);
const char *CONF_imodule_get_value(const CONF_IMODULE *md);
void *CONF_imodule_get_usr_data(const CONF_IMODULE *md);
void CONF_imodule_set_usr_data(CONF_IMODULE *md, void *usr_data);
CONF_MODULE *CONF_imodule_get_module(const CONF_IMODULE *md);
unsigned long CONF_imodule_get_flags(const CONF_IMODULE *md);
void CONF_imodule_set_flags(CONF_IMODULE *md, unsigned long flags);
void *CONF_module_get_usr_data(CONF_MODULE *pmod);
void CONF_module_set_usr_data(CONF_MODULE *pmod, void *usr_data);

char *CONF_get1_default_config_file(void);

int CONF_parse_list(const char *list, int sep, int nospc, int (*list_cb) (const char *elem, int len, void *usr), void *arg);

void OPENSSL_load_builtin_modules(void);
]]
