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luacstruct.h
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luacstruct.h
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/*
* Copyright (c) 2021 YASUOKA Masahiko <yasuoka@yasuoka.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef LUACSTRUCT_H
#define LUACSTRUCT_H 1
#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <lua.h>
enum luacstruct_type {
LUACS_TINT8,
LUACS_TINT16,
LUACS_TINT32,
LUACS_TINT64,
LUACS_TUINT8,
LUACS_TUINT16,
LUACS_TUINT32,
LUACS_TUINT64,
LUACS_TENUM,
LUACS_TBOOL,
LUACS_TSTRING,
LUACS_TSTRPTR,
LUACS_TBYTEARRAY,
LUACS_TOBJREF,
LUACS_TOBJENT,
LUACS_TEXTREF,
LUACS_TARRAY,
LUACS_TMETHOD,
LUACS_TCONST
};
#define LUACS_FREADONLY 0x01
#define LUACS_FENDIANBIG 0x02
#define LUACS_FENDIANLITTLE 0x04
#define LUACS_FENDIAN (LUACS_FENDIANBIG | LUACS_FENDIANLITTLE)
#ifdef __cplusplus
extern "C" {
#endif
int luacs_newstruct0(lua_State *, const char *, const char *);
int luacs_declare_method(lua_State *, const char *, int (*)(lua_State *));
int luacs_declare_const(lua_State *, const char *, int);
int luacs_delstruct(lua_State *, const char *);
int luacs_declare_field(lua_State *, enum luacstruct_type,
const char *, const char *, size_t, int, int, unsigned);
int luacs_newobject(lua_State *, const char *, void *);
void *luacs_object_pointer(lua_State *, int, const char *);
void luacs_object_clear(lua_State *, int);
int luacs_object_typename(lua_State *);
void *luacs_checkobject(lua_State *, int, const char *);
int luacs_newenum0(lua_State *, const char *, size_t);
int luacs_newenumval(lua_State *, const char *, intmax_t);
int luacs_delenum(lua_State *, const char *);
int luacs_enum_declare_value(lua_State *, const char *, intmax_t);
int luacs_checkenumval(lua_State *, int, const char *);
int luacs_newarray(lua_State *, enum luacstruct_type, const char *,
size_t, int, unsigned, void *);
int luacs_newarraytype(lua_State *, const char *, enum luacstruct_type,
const char *, size_t, int, unsigned);
#ifdef __cplusplus
}
#endif
#define luacs_newstruct(_L, _typename) \
do { \
{ struct _typename; /* check valid for type */} \
luacs_newstruct0((_L), #_typename, NULL); \
} while(0/*CONSTCOND*/)
#define luacs_newenum(_L, _enumname) \
do { \
{ enum _enumname; /* check valid for enum */} \
luacs_newenum0((_L), #_enumname, \
sizeof(enum _enumname)); \
} while(0/*CONSTCOND*/)
#define validintwidth(_w) \
((_w) == 1 || (_w) == 2 || (_w) == 4 || (_w) == 8)
#define luacs_int_field(_L, _type, _field, _flags) \
do { \
static_assert(validintwidth( \
sizeof((struct _type *)0)->_field), \
"`"#_field"' is an unsupported int type"); \
enum luacstruct_type _itype; \
switch(sizeof(((struct _type *)0)->_field)) { \
case 1: _itype = LUACS_TINT8; break; \
case 2: _itype = LUACS_TINT16; break; \
case 4: _itype = LUACS_TINT32; break; \
case 8: _itype = LUACS_TINT64; break; \
} \
luacs_declare_field((_L), _itype, NULL, #_field,\
sizeof(((struct _type *)0)->_field), \
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_unsigned_field(_L, _type, _field, _flags) \
do { \
static_assert(validintwidth( \
sizeof((struct _type *)0)->_field), \
"`"#_field"' is an unsupported int type"); \
enum luacstruct_type _itype; \
switch (sizeof(((struct _type *)0)->_field)) { \
case 1: _itype = LUACS_TUINT8; break; \
case 2: _itype = LUACS_TUINT16; break; \
case 4: _itype = LUACS_TUINT32; break; \
case 8: _itype = LUACS_TUINT64; break; \
} \
luacs_declare_field((_L), _itype, NULL, #_field,\
sizeof(((struct _type *)0)->_field), \
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_enum_field(_L, _type, _etype, _field, _flags) \
do { \
static_assert(validintwidth( \
sizeof((struct _type *)0)->_field), \
"`"#_field"' is an unsupported int type"); \
luacs_declare_field((_L), LUACS_TENUM, #_etype, \
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_bool_field(_L, _type, _field, _flags) \
do { \
static_assert(sizeof(bool) == \
sizeof(((struct _type *)0)->_field), \
"`"#_field"' is not a bool value"); \
luacs_declare_field((_L), LUACS_TBOOL, NULL, \
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_bytearray_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TBYTEARRAY, NULL,\
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_string_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TSTRING, NULL, \
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_strptr_field(_L, _type, _field, _flags) \
do { \
static_assert(sizeof(char *) == \
sizeof(((struct _type *)0)->_field), \
"`"#_field"' is not a pointer value"); \
luacs_declare_field((_L), LUACS_TSTRPTR, NULL, \
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_objref_field(_L, _type, _tname, _field, _flags) \
do { \
static_assert(sizeof(void *) == \
sizeof(((struct _type *)0)->_field), \
"`"#_field"' is not a pointer value"); \
luacs_declare_field((_L), LUACS_TOBJREF, #_tname,\
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_nested_field(_L, _type, _tname, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TOBJENT, #_tname,\
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
#define luacs_extref_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TEXTREF, NULL, \
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), 0, _flags); \
} while (0/*CONSTCOND*/)
/*
* When using Lua 5.1 and the pseudo value might reference the parent object,
* you need to explicitly clear the value or call luacs_object_clear().
* luacstruct uses a weak reference to manage the reference from the object to
* the pseudo values, but since a weak table in Lua 5.1 is not an ephemeron
* table, it doesn't work properly.
*/
#define luacs_pseudo_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TEXTREF, NULL, \
#_field, 0, 0, 0, _flags); \
} while (0/*CONSTCOND*/)
#define _nitems(_x) (sizeof(_x) / sizeof((_x)[0]))
#define luacs_int_array_field(_L, _type, _field, _flags) \
do { \
static_assert(validintwidth( \
sizeof((struct _type *)0)->_field[0]), \
"`"#_field"' is an unsupported int type"); \
enum luacstruct_type _itype; \
switch(sizeof(((struct _type *)0)->_field[0])) {\
case 1: _itype = LUACS_TINT8; break; \
case 2: _itype = LUACS_TINT16; break; \
case 4: _itype = LUACS_TINT32; break; \
case 8: _itype = LUACS_TINT64; break; \
} \
luacs_declare_field((_L), _itype, NULL, #_field,\
sizeof(((struct _type *)0)->_field[0]), \
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_unsigned_array_field(_L, _type, _field, _flags) \
do { \
static_assert(validintwidth( \
sizeof((struct _type *)0)->_field[0]), \
"`"#_field"' is an unsupported int type"); \
enum luacstruct_type _itype; \
switch (sizeof(((struct _type *)0)->_field[0])){\
case 1: _itype = LUACS_TUINT8; break; \
case 2: _itype = LUACS_TUINT16; break; \
case 4: _itype = LUACS_TUINT32; break; \
case 8: _itype = LUACS_TUINT64; break; \
} \
luacs_declare_field((_L), _itype, NULL, #_field,\
sizeof(((struct _type *)0)->_field[0]), \
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_enum_array_field(_L, _type, _etype, _field, _flags)\
do { \
static_assert(validintwidth( \
sizeof((struct _type *)0)->_field[0]), \
"`"#_field"' is an unsupported int type"); \
luacs_declare_field((_L), LUACS_TENUM, #_etype, \
#_field, sizeof(((struct _type *)0)->_field),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_bool_array_field(_L, _type, _field, _flags) \
do { \
static_assert(sizeof(bool) == \
sizeof(((struct _type *)0)->_field[0]), \
"`"#_field"' is not a bool value"); \
luacs_declare_field((_L), LUACS_TBOOL, NULL, \
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_bytearray_array_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TBYTEARRAY, NULL,\
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_string_array_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TSTRING, NULL, \
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_strptr_array_field(_L, _type, _field, _flags) \
do { \
static_assert(sizeof(char *) == \
sizeof(((struct _type *)0)->_field[0]), \
"`"#_field"' is not a pointer value"); \
luacs_declare_field((_L), LUACS_TSTRPTR, NULL, \
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_objref_array_field(_L, _type, _tname, _field, _flags)\
do { \
static_assert(sizeof(void *) == \
sizeof(((struct _type *)0)->_field[0]), \
"`"#_field"' is not a pointer value"); \
luacs_declare_field((_L), LUACS_TOBJREF, #_tname,\
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_nested_array_field(_L, _type, _tname, _field, _flags)\
do { \
luacs_declare_field((_L), LUACS_TOBJENT, #_tname,\
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_extref_array_field(_L, _type, _field, _flags) \
do { \
luacs_declare_field((_L), LUACS_TEXTREF, NULL, \
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#define luacs_array_array_field(_L, _type, _tname, _field, _flags)\
do { \
luacs_declare_field((_L), LUACS_TARRAY, #_tname,\
#_field, sizeof(((struct _type *)0)->_field[0]),\
offsetof(struct _type, _field), \
_nitems(((struct _type *)0)->_field), _flags);\
} while (0/*CONSTCOND*/)
#endif