/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1996-2013. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#ifndef _ERL_INTERFACE_H
#define _ERL_INTERFACE_H
/************************************************************************/
/* This file defines the complete interface to erl_interface */
/* Note: the 'ei' interface is the prefered C API. */
/************************************************************************/
/* FIXME only include if needed? */
#include "ei.h" /* ei is the base */
/* -------------------------------------------------------------------- */
/* Public defines */
/* -------------------------------------------------------------------- */
#define ERL_COMPOUND (1 << 7)
#define ERL_UNDEF 0
#define ERL_INTEGER 1
#define ERL_U_INTEGER 2 /* unsigned int */
#define ERL_ATOM 3
#define ERL_PID 4
#define ERL_PORT 5
#define ERL_REF 6
#define ERL_CONS (7 | ERL_COMPOUND)
#define ERL_LIST ERL_CONS
#define ERL_NIL 8
#define ERL_EMPTY_LIST ERL_NIL
#define ERL_TUPLE (9 | ERL_COMPOUND)
#define ERL_BINARY 10
#define ERL_FLOAT 11
#define ERL_VARIABLE (12 | ERL_COMPOUND) /* used in patterns */
#define ERL_SMALL_BIG 13
#define ERL_U_SMALL_BIG 14
#define ERL_FUNCTION (15 | ERL_COMPOUND)
#define ERL_BIG 16
#define ERL_LONGLONG 17
#define ERL_U_LONGLONG 18
#define ERL_TYPE(x) (ERL_HEADER(x)->type)
/* FIXME some macros left in erl_eterm.h should probably be documented */
#define ERL_IS_INTEGER(x) (ERL_TYPE(x) == ERL_INTEGER)
#define ERL_IS_UNSIGNED_INTEGER(x) (ERL_TYPE(x) == ERL_U_INTEGER)
#define ERL_IS_LONGLONG(x) (ERL_TYPE(x) == ERL_LONGLONG)
#define ERL_IS_UNSIGNED_LONGLONG(x) (ERL_TYPE(x) == ERL_U_LONGLONG)
#define ERL_IS_FLOAT(x) (ERL_TYPE(x) == ERL_FLOAT)
#define ERL_IS_ATOM(x) (ERL_TYPE(x) == ERL_ATOM)
#define ERL_IS_PID(x) (ERL_TYPE(x) == ERL_PID)
#define ERL_IS_PORT(x) (ERL_TYPE(x) == ERL_PORT)
#define ERL_IS_REF(x) (ERL_TYPE(x) == ERL_REF)
#define ERL_IS_TUPLE(x) (ERL_TYPE(x) == ERL_TUPLE)
#define ERL_IS_BINARY(x) (ERL_TYPE(x) == ERL_BINARY)
#define ERL_IS_NIL(x) (ERL_TYPE(x) == ERL_NIL)
#define ERL_IS_EMPTY_LIST(x) ERL_IS_NIL(x)
#define ERL_IS_CONS(x) (ERL_TYPE(x) == ERL_CONS)
#define ERL_IS_LIST(x) (ERL_IS_CONS(x) || ERL_IS_EMPTY_LIST(x))
/*
* Macros used for XXXX
*/
#define ERL_HEADER(x) ((Erl_Header *)x)
#define ERL_COUNT(x) (ERL_HEADER(x)->count)
/*
* Macros used for retrieving values from Erlang terms.
*/
#define ERL_INT_VALUE(x) ((x)->uval.ival.i)
#define ERL_INT_UVALUE(x) ((x)->uval.uival.u)
#define ERL_LL_VALUE(x) ((x)->uval.llval.i)
#define ERL_LL_UVALUE(x) ((x)->uval.ullval.u)
#define ERL_FLOAT_VALUE(x) ((x)->uval.fval.f)
#define ERL_ATOM_PTR(x) erl_atom_ptr_latin1((Erl_Atom_data*) &(x)->uval.aval.d)
#define ERL_ATOM_PTR_UTF8(x) erl_atom_ptr_utf8((Erl_Atom_data*) &(x)->uval.aval.d)
#define ERL_ATOM_SIZE(x) erl_atom_size_latin1((Erl_Atom_data*) &(x)->uval.aval.d)
#define ERL_ATOM_SIZE_UTF8(x) erl_atom_size_utf8((Erl_Atom_data*) &(x)->uval.aval.d)
#define ERL_PID_NODE(x) erl_atom_ptr_latin1((Erl_Atom_data*) &(x)->uval.pidval.node)
#define ERL_PID_NODE_UTF8(x) erl_atom_ptr_utf8((Erl_Atom_data*) &(x)->uval.pidval.node)
#define ERL_PID_NUMBER(x) ((x)->uval.pidval.number)
#define ERL_PID_SERIAL(x) ((x)->uval.pidval.serial)
#define ERL_PID_CREATION(x) ((x)->uval.pidval.creation)
#define ERL_PORT_NODE(x) erl_atom_ptr_latin1((Erl_Atom_data*) &(x)->uval.portval.node)
#define ERL_PORT_NODE_UTF8(x) erl_atom_ptr_utf8((Erl_Atom_data*) &(x)->uval.portval.node)
#define ERL_PORT_NUMBER(x) ((x)->uval.portval.number)
#define ERL_PORT_CREATION(x) ((x)->uval.portval.creation)
#define ERL_REF_NODE(x) erl_atom_ptr_latin1((Erl_Atom_data*) &(x)->uval.refval.node)
#define ERL_REF_NODE_UTF8(x) erl_atom_ptr_utf8((Erl_Atom_data*) &(x)->uval.refval.node)
#define ERL_REF_NUMBER(x) ((x)->uval.refval.n[0])
#define ERL_REF_NUMBERS(x) ((x)->uval.refval.n)
#define ERL_REF_LEN(x) ((x)->uval.refval.len)
#define ERL_REF_CREATION(x) ((x)->uval.refval.creation)
#define ERL_TUPLE_SIZE(x) ((x)->uval.tval.size)
/* NOTE!!! This is 0-based!! (first item is number 0)
* Note too that element/2 (in Erlang) and
* erl_element() are both 1-based.
*/
#define ERL_TUPLE_ELEMS(x) ((x)->uval.tval.elems)
#define ERL_TUPLE_ELEMENT(x, i) (ERL_TUPLE_ELEMS(x)[(i)])
#define ERL_BIN_SIZE(x) ((x)->uval.bval.size)
#define ERL_BIN_PTR(x) ((x)->uval.bval.b)
#define ERL_CONS_HEAD(x) ((x)->uval.lval.head)
#define ERL_CONS_TAIL(x) ((x)->uval.lval.tail)
#define ERL_VAR_LEN(x) ((x)->uval.vval.len)
#define ERL_VAR_NAME(x) ((x)->uval.vval.name)
#define ERL_VAR_VALUE(x) ((x)->uval.vval.v)
#define ERL_CLOSURE_SIZE(x) ((x)->uval.funcval.size)
#define ERL_FUN_CREATOR(x) ((x)->uval.funcval.creator)
#define ERL_FUN_MODULE(x) ((x)->uval.funcval.module)
#define ERL_FUN_UNIQ(x) ((x)->uval.funcval.uniq)
#define ERL_FUN_INDEX(x) ((x)->uval.funcval.index)
#define ERL_FUN_ARITY(x) ((x)->uval.funcval.arity)
#define ERL_FUN_NEW_INDEX(x) ((x)->uval.funcval.new_index)
#define ERL_FUN_MD5(x) ((x)->uval.funcval.md5)
#define ERL_CLOSURE(x) ((x)->uval.funcval.closure)
#define ERL_CLOSURE_ELEMENT(x,i) (ERL_CLOSURE(x)[(i)])
#ifdef __cplusplus
extern "C" {
#endif
/* -------------------------------------------------------------------- */
/* Type definitions of Erlang terms in C */
/* -------------------------------------------------------------------- */
typedef struct {
unsigned int count:24; /* reference counter */
unsigned int type:8; /* type of Erlang term */
} Erl_Header;
typedef struct {
Erl_Header h;
int i;
} Erl_Integer;
typedef struct {
Erl_Header h;
unsigned int u;
} Erl_Uinteger;
typedef struct {
Erl_Header h;
long long i;
} Erl_LLInteger;
typedef struct {
Erl_Header h;
unsigned long long u;
} Erl_ULLInteger;
typedef struct {
Erl_Header h;
double f;
} Erl_Float;
typedef struct {
char *utf8;
int lenU;
char *latin1;
int lenL;
} Erl_Atom_data;
char* erl_atom_ptr_latin1(Erl_Atom_data*);
char* erl_atom_ptr_utf8(Erl_Atom_data*);
int erl_atom_size_latin1(Erl_Atom_data*);
int erl_atom_size_utf8(Erl_Atom_data*);
char* erl_atom_init_latin1(Erl_Atom_data*, const char*);
typedef struct {
Erl_Header h;
Erl_Atom_data d;
} Erl_Atom;
typedef struct {
Erl_Header h;
Erl_Atom_data node;
unsigned int number;
unsigned int serial;
unsigned int creation;
} Erl_Pid;
typedef struct {
Erl_Header h;
Erl_Atom_data node;
unsigned int number;
unsigned int creation;
} Erl_Port;
typedef struct {
Erl_Header h;
Erl_Atom_data node;
int len;
unsigned int n[3];
unsigned int creation;
} Erl_Ref;
typedef struct {
Erl_Header h;
int arity;
int is_neg;
unsigned short *digits;
} Erl_Big;
struct _eterm; /* forward */
typedef struct {
Erl_Header h;
struct _eterm *head;
struct _eterm *tail;
} Erl_List;
typedef struct {
Erl_Header h;
} Erl_EmptyList;
typedef struct {
Erl_Header h;
int size;
struct _eterm **elems;
} Erl_Tuple;
typedef struct {
Erl_Header h;
int size;
unsigned char *b;
} Erl_Binary;
/* Variables may only exist in patterns.
* Note: identical variable names in a pattern
* denotes the same value.
*/
typedef struct {
Erl_Header h;
int len;
char *name;
struct _eterm *v;
} Erl_Variable;
typedef struct {
Erl_Header h;
int size; /* size of closure */
int arity; /* arity for new (post R7) external funs */
unsigned char md5[16]; /* md5 for new funs */
int new_index; /* new funs */
struct _eterm* creator; /* pid */
struct _eterm* module; /* module */
struct _eterm* index;
struct _eterm* uniq;
struct _eterm** closure;
} Erl_Function;
typedef struct _eterm {
union {
Erl_Integer ival;
Erl_Uinteger uival;
Erl_LLInteger llval;
Erl_ULLInteger ullval;
Erl_Float fval;
Erl_Atom aval;
Erl_Pid pidval;
Erl_Port portval;
Erl_Ref refval;
Erl_List lval;
Erl_EmptyList nval;
Erl_Tuple tval;
Erl_Binary bval;
Erl_Variable vval;
Erl_Function funcval;
Erl_Big bigval;
} uval;
} ETERM;
#define MAXREGLEN (255*4) /* max length of registered (atom) name */
typedef struct {
int type; /* one of the message type constants in eiext.h */
ETERM *msg; /* the actual message */
ETERM *from;
ETERM *to;
char to_name[MAXREGLEN+1];
} ErlMessage;
typedef unsigned char Erl_Heap;
/* -------------------------------------------------------------------- */
/* The functions */
/* -------------------------------------------------------------------- */
void erl_init(void *x, long y);
void erl_set_compat_rel(unsigned);
int erl_connect_init(int, char*,short);
int erl_connect_xinit(char*,char*,char*,struct in_addr*,char*,short);
int erl_connect(char*);
int erl_xconnect(struct in_addr*,char *);
int erl_close_connection(int);
int erl_receive(int, unsigned char*, int);
int erl_receive_msg(int, unsigned char*, int, ErlMessage*);
int erl_xreceive_msg(int, unsigned char**, int*, ErlMessage*);
int erl_send(int, ETERM*, ETERM*);
int erl_reg_send(int, char*, ETERM*);
ETERM *erl_rpc(int,char*,char*,ETERM*);
int erl_rpc_to(int,char*,char*,ETERM*);
int erl_rpc_from(int,int,ErlMessage*);
/* erl_publish returns open descriptor on success, or -1 */
int erl_publish(int port);
int erl_accept(int,ErlConnect*);
const char *erl_thiscookie(void);
const char *erl_thisnodename(void);
const char *erl_thishostname(void);
const char *erl_thisalivename(void);
short erl_thiscreation(void);
/* returns 0 on success, -1 if node not known to epmd or epmd not reached */
int erl_unpublish(const char *alive);
/* Report generic error to stderr. */
void erl_err_msg(const char * __template, ...)
__attribute__ ((__format__ (printf, 1, 2)));
/* Report generic error to stderr and die. */
void erl_err_quit(const char * __template, ...)
__attribute__ ((__format__ (printf, 1, 2), __noreturn__));
/* Report system/libc error to stderr. */
void erl_err_ret(const char * __template, ...)
__attribute__ ((__format__ (printf, 1, 2)));
/* Report system/libc error to stderr and die. */
void erl_err_sys(const char * __template, ...)
__attribute__ ((__format__ (printf, 1, 2), __noreturn__));
ETERM *erl_cons(ETERM*,ETERM*);
ETERM *erl_copy_term(const ETERM*);
ETERM *erl_element(int,const ETERM*);
ETERM *erl_hd(const ETERM*);
ETERM* erl_iolist_to_binary(const ETERM* term);
char* erl_iolist_to_string(const ETERM* term);
int erl_iolist_length(const ETERM*);
int erl_length(const ETERM*);
ETERM *erl_mk_atom(const char*);
ETERM *erl_mk_binary(const char*,int);
ETERM *erl_mk_empty_list(void);
ETERM *erl_mk_estring(const char*, int);
ETERM *erl_mk_float(double);
ETERM *erl_mk_int(int);
ETERM *erl_mk_longlong(long long);
ETERM *erl_mk_list(ETERM**,int);
ETERM *erl_mk_pid(const char*,unsigned int,unsigned int,unsigned char);
ETERM *erl_mk_port(const char*,unsigned int,unsigned char);
ETERM *erl_mk_ref(const char*,unsigned int,unsigned char);
ETERM *erl_mk_long_ref(const char*,unsigned int,unsigned int,
unsigned int,unsigned char);
ETERM *erl_mk_string(const char*);
ETERM *erl_mk_tuple(ETERM**,int);
ETERM *erl_mk_uint(unsigned int);
ETERM *erl_mk_ulonglong(unsigned long long);
ETERM *erl_mk_var(const char*);
int erl_print_term(FILE*,const ETERM*);
/* int erl_sprint_term(char*,const ETERM*); */
int erl_size(const ETERM*);
ETERM *erl_tl(const ETERM*);
ETERM *erl_var_content(const ETERM*, const char*);
ETERM *erl_format(char*, ... );
int erl_match(ETERM*, ETERM*);
char **erl_global_names(int fd, int *count);
int erl_global_register(int fd, const char *name, ETERM *pid);
int erl_global_unregister(int fd, const char *name);
ETERM *erl_global_whereis(int fd, const char *name, char *node);
void erl_init_malloc(Erl_Heap*,long);
ETERM *erl_alloc_eterm(unsigned char);
void erl_eterm_release(void);
void erl_eterm_statistics(unsigned long*,unsigned long*);
void erl_free_array(ETERM**,int);
void erl_free_term(ETERM*);
void erl_free_compound(ETERM*);
void *erl_malloc(long);
void erl_free(void*);
int erl_compare_ext(unsigned char*, unsigned char*);
ETERM *erl_decode(unsigned char*);
ETERM *erl_decode_buf(unsigned char**);
int erl_encode(ETERM*,unsigned char*t);
int erl_encode_buf(ETERM*,unsigned char**);
int erl_ext_size(unsigned char*);
unsigned char erl_ext_type(unsigned char*); /* Note: returned 'char' before R9C */
unsigned char *erl_peek_ext(unsigned char*,int);
int erl_term_len(ETERM*);
int cmp_latin1_vs_utf8(const char* sL, int lenL, const char* sU, int lenU);
/* -------------------------------------------------------------------- */
/* Wrappers around ei functions */
/* -------------------------------------------------------------------- */
/*
* Undocumented before R9C, included for compatibility with old code
*/
struct hostent *erl_gethostbyname(const char *name);
struct hostent *erl_gethostbyaddr(const char *addr, int len, int type);
struct hostent *erl_gethostbyname_r(const char *name,
struct hostent *hostp,
char *buffer,
int buflen,
int *h_errnop);
struct hostent *erl_gethostbyaddr_r(const char *addr,
int length,
int type,
struct hostent *hostp,
char *buffer,
int buflen,
int *h_errnop);
/*
* Undocumented, included for compatibility with old code
*/
void erl_init_resolve(void);
int erl_distversion(int fd);
int erl_epmd_connect(struct in_addr *inaddr);
int erl_epmd_port(struct in_addr *inaddr, const char *alive, int *dist);
#ifdef __cplusplus
}
#endif
#endif
