diff options
Diffstat (limited to 'plugins/MirLua/Modules/ffi/src/ffi.c')
| -rw-r--r-- | plugins/MirLua/Modules/ffi/src/ffi.c | 3554 |
1 files changed, 0 insertions, 3554 deletions
diff --git a/plugins/MirLua/Modules/ffi/src/ffi.c b/plugins/MirLua/Modules/ffi/src/ffi.c deleted file mode 100644 index 20dcfbdc49..0000000000 --- a/plugins/MirLua/Modules/ffi/src/ffi.c +++ /dev/null @@ -1,3554 +0,0 @@ -/* vim: ts=4 sw=4 sts=4 et tw=78
- * Portions copyright (c) 2015-present, Facebook, Inc. All rights reserved.
- * Portions copyright (c) 2011 James R. McKaskill.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-#include "ffi.h"
-#include <math.h>
-
-/* Set to 1 to get extra debugging on print */
-#define DEBUG_TOSTRING 0
-
-int jit_key;
-int ctype_mt_key;
-int cdata_mt_key;
-int callback_mt_key;
-int cmodule_mt_key;
-int constants_key;
-int types_key;
-int gc_key;
-int callbacks_key;
-int functions_key;
-int abi_key;
-int next_unnamed_key;
-int niluv_key;
-int asmname_key;
-
-void push_upval(lua_State* L, int* key)
-{
- lua_pushlightuserdata(L, key);
- lua_rawget(L, LUA_REGISTRYINDEX);
-}
-
-void set_upval(lua_State* L, int* key)
-{
- lua_pushlightuserdata(L, key);
- lua_insert(L, -2);
- lua_rawset(L, LUA_REGISTRYINDEX);
-}
-
-int equals_upval(lua_State* L, int idx, int* key)
-{
- int ret;
- lua_pushvalue(L, idx);
- push_upval(L, key);
- ret = lua_rawequal(L, -2, -1);
- lua_pop(L, 2);
- return ret;
-}
-
-struct jit* get_jit(lua_State* L)
-{
- struct jit* jit;
- push_upval(L, &jit_key);
- jit = (struct jit*) lua_touserdata(L, -1);
- jit->L = L;
- lua_pop(L, 1); /* still in registry */
- return jit;
-}
-
-static int type_error(lua_State* L, int idx, const char* to_type, int to_usr, const struct ctype* to_ct)
-{
- luaL_Buffer B;
- struct ctype ft;
-
- assert(to_type || (to_usr && to_ct));
- if (to_usr) {
- to_usr = lua_absindex(L, to_usr);
- }
-
- idx = lua_absindex(L, idx);
-
- luaL_buffinit(L, &B);
- to_cdata(L, idx, &ft);
-
- if (ft.type != INVALID_TYPE) {
- push_type_name(L, -1, &ft);
- lua_pushfstring(L, "unable to convert argument %d from cdata<%s> to cdata<", idx, lua_tostring(L, -1));
- lua_remove(L, -2);
- luaL_addvalue(&B);
- } else {
- lua_pushfstring(L, "unable to convert argument %d from lua<%s> to cdata<", idx, luaL_typename(L, idx));
- luaL_addvalue(&B);
- }
-
- if (to_ct) {
- push_type_name(L, to_usr, to_ct);
- luaL_addvalue(&B);
- } else {
- luaL_addstring(&B, to_type);
- }
-
- luaL_addchar(&B, '>');
-
- luaL_pushresult(&B);
- return lua_error(L);
-}
-
-static void* userdata_toptr(lua_State* L, int idx)
-{
- void* ptr = lua_touserdata(L, idx);
- int isfile = 0;
-
- // check for FILE*
- lua_getmetatable(L, idx);
- luaL_getmetatable(L, LUA_FILEHANDLE);
- isfile = lua_rawequal(L, -1, -2);
- lua_pop(L, 2);
-
- if (isfile) {
-#if LUA_VERSION_NUM == 501
- FILE** stream = (FILE**) ptr;
- return *stream;
-#else
- luaL_Stream* stream = (luaL_Stream*) ptr;
- return stream->f;
-#endif
- }
-
- return ptr;
-}
-
-static int cdata_tointeger(lua_State* L, int idx, ptrdiff_t* val)
-{
- struct ctype ct;
- void* addr = to_cdata(L, idx, &ct);
- lua_pop(L, 1);
-
- if (ct.pointers) {
- return 0;
- }
-
- switch (ct.type) {
- case INT8_TYPE:
- *val = *(int8_t*)addr;
- return 1;
- case INT16_TYPE:
- *val = *(int16_t*)addr;
- return 1;
- case INT32_TYPE:
- *val = *(int32_t*)addr;
- return 1;
- case INT64_TYPE:
- *val = *(int64_t*)addr;
- return 1;
- default:
- return 0;
- }
-}
-
-static int64_t check_intptr(lua_State* L, int idx, void* p, struct ctype* ct)
-{
- if (ct->type == INVALID_TYPE) {
- int64_t ret;
- memset(ct, 0, sizeof(*ct));
- ct->base_size = 8;
- ct->type = INT64_TYPE;
- ct->is_defined = 1;
- ret = luaL_checknumber(L, idx);
- return ret;
-
- } else if (ct->pointers) {
- return (intptr_t) p;
- }
-
- switch (ct->type) {
- case INTPTR_TYPE:
- case FUNCTION_PTR_TYPE:
- return *(intptr_t*) p;
-
- case INT64_TYPE:
- return *(int64_t*) p;
-
- case INT32_TYPE:
- return ct->is_unsigned ? (int64_t) *(uint32_t*) p : (int64_t) *(int32_t*) p;
-
- case INT16_TYPE:
- return ct->is_unsigned ? (int64_t) *(uint16_t*) p : (int64_t) *(int16_t*) p;
-
- case INT8_TYPE:
- return ct->is_unsigned ? (int64_t) *(uint8_t*) p : (int64_t) *(int8_t*) p;
-
- default:
- type_error(L, idx, "intptr_t", 0, NULL);
- return 0;
- }
-}
-
-static int get_cfunction_address(lua_State* L, int idx, cfunction* addr);
-
-#define TO_NUMBER(TYPE, ALLOW_POINTERS) \
- TYPE ret = 0; \
- void* p; \
- struct ctype ct; \
- cfunction f; \
- \
- switch (lua_type(L, idx)) { \
- case LUA_TBOOLEAN: \
- ret = (TYPE) lua_toboolean(L, idx); \
- break; \
- \
- case LUA_TNUMBER: \
- ret = (TYPE) lua_tonumber(L, idx); \
- break; \
- \
- case LUA_TSTRING: \
- if (!ALLOW_POINTERS) { \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
- ret = (TYPE) (intptr_t) lua_tostring(L, idx); \
- break; \
- \
- case LUA_TLIGHTUSERDATA: \
- if (!ALLOW_POINTERS) { \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
- ret = (TYPE) (intptr_t) lua_topointer(L, idx); \
- break; \
- \
- case LUA_TFUNCTION: \
- if (!ALLOW_POINTERS) { \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
- if (!get_cfunction_address(L, idx, &f)) { \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
- ret = (TYPE) (intptr_t) f; \
- break; \
- \
- case LUA_TUSERDATA: \
- p = to_cdata(L, idx, &ct); \
- \
- if (ct.type == INVALID_TYPE) { \
- if (!ALLOW_POINTERS) { \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
- ret = (TYPE) (intptr_t) userdata_toptr(L, idx); \
- } else if (ct.pointers || ct.type == STRUCT_TYPE || ct.type == UNION_TYPE) {\
- if (!ALLOW_POINTERS) { \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
- ret = (TYPE) (intptr_t) p; \
- } else if (ct.type == COMPLEX_DOUBLE_TYPE) { \
- ret = (TYPE) creal(*(complex_double*) p); \
- } else if (ct.type == COMPLEX_FLOAT_TYPE) { \
- ret = (TYPE) crealf(*(complex_float*) p); \
- } else if (ct.type == DOUBLE_TYPE) { \
- ret = (TYPE) *(double*) p; \
- } else if (ct.type == FLOAT_TYPE) { \
- ret = (TYPE) *(float*) p; \
- } else { \
- ret = check_intptr(L, idx, p, &ct); \
- } \
- lua_pop(L, 1); \
- break; \
- \
- case LUA_TNIL: \
- ret = (TYPE) 0; \
- break; \
- \
- default: \
- type_error(L, idx, #TYPE, 0, NULL); \
- } \
-
-static int64_t cast_int64(lua_State* L, int idx, int is_cast)
-{ TO_NUMBER(int64_t, is_cast); return ret; }
-
-static uint64_t cast_uint64(lua_State* L, int idx, int is_cast)
-{ TO_NUMBER(uint64_t, is_cast); return ret; }
-
-int32_t check_int32(lua_State* L, int idx)
-{ return (int32_t) cast_int64(L, idx, 0); }
-
-uint32_t check_uint32(lua_State* L, int idx)
-{ return (uint32_t) cast_uint64(L, idx, 0); }
-
-int64_t check_int64(lua_State* L, int idx)
-{ return cast_int64(L, idx, 0); }
-
-uint64_t check_uint64(lua_State* L, int idx)
-{ return cast_uint64(L, idx, 0); }
-
-double check_double(lua_State* L, int idx)
-{ TO_NUMBER(double, 0); return ret; }
-
-float check_float(lua_State* L, int idx)
-{ TO_NUMBER(double, 0); return ret; }
-
-uintptr_t check_uintptr(lua_State* L, int idx)
-{ TO_NUMBER(uintptr_t, 1); return ret; }
-
-complex_double check_complex_double(lua_State* L, int idx)
-{
- double real = 0, imag = 0;
- void* p;
- struct ctype ct;
-
- switch (lua_type(L, idx)) {
- case LUA_TNUMBER:
- real = (double) lua_tonumber(L, idx);
- break;
- case LUA_TTABLE:
- lua_rawgeti(L, idx, 1);
- real = check_double(L, -1);
- lua_pop(L, 1);
-
- lua_rawgeti(L, idx, 2);
- if (lua_isnil(L, -1)) {
- imag = real;
- } else {
- imag = check_double(L, -1);
- }
- lua_pop(L, 1);
- break;
- case LUA_TUSERDATA:
- p = to_cdata(L, idx, &ct);
- if (ct.type == COMPLEX_DOUBLE_TYPE) {
- real = creal(*(complex_double*) p);
- imag = cimag(*(complex_double*) p);
- } else if (ct.type == COMPLEX_FLOAT_TYPE) {
- real = crealf(*(complex_float*) p);
- imag = cimagf(*(complex_float*) p);
- } else if (ct.type == DOUBLE_TYPE) {
- real = *(double*) p;
- } else if (ct.type == FLOAT_TYPE) {
- real = *(float*) p;
- } else {
- real = check_intptr(L, idx, p, &ct);
- }
- lua_pop(L, 1);
- break;
-
- default:
- type_error(L, idx, "complex", 0, NULL);
- }
-
- return mk_complex_double(real, imag);
-}
-
-complex_float check_complex_float(lua_State* L, int idx)
-{
- complex_double d = check_complex_double(L, idx);
- return mk_complex_float(creal(d), cimag(d));
-}
-
-static size_t unpack_vararg(lua_State* L, int i, char* to)
-{
- void* p;
- struct ctype ct;
-
- switch (lua_type(L, i)) {
- case LUA_TBOOLEAN:
- *(int*) to = lua_toboolean(L, i);
- return sizeof(int);
-
- case LUA_TNUMBER:
- *(double*) to = lua_tonumber(L, i);
- return sizeof(double);
-
- case LUA_TSTRING:
- *(const char**) to = lua_tostring(L, i);
- return sizeof(const char*);
-
- case LUA_TLIGHTUSERDATA:
- *(void**) to = lua_touserdata(L, i);
- return sizeof(void*);
-
- case LUA_TUSERDATA:
- p = to_cdata(L, i, &ct);
- lua_pop(L, 1);
-
- if (ct.type == INVALID_TYPE) {
- *(void**) to = userdata_toptr(L, i);
- return sizeof(void*);
-
- } else if (ct.pointers || ct.type == INTPTR_TYPE) {
- *(void**) to = p;
- return sizeof(void*);
-
- } else if (ct.type == INT32_TYPE) {
- *(int32_t*) to = *(int32_t*) p;
- return sizeof(int32_t);
-
- } else if (ct.type == INT64_TYPE) {
- *(int64_t*) to = *(int64_t*) p;
- return sizeof(int64_t);
- }
- goto err;
-
- case LUA_TNIL:
- *(void**) to = NULL;
- return sizeof(void*);
-
- default:
- goto err;
- }
-
-err:
- return type_error(L, i, "vararg", 0, NULL);
-}
-
-void unpack_varargs_stack(lua_State* L, int first, int last, char* to)
-{
- int i;
-
- for (i = first; i <= last; i++) {
- to += unpack_vararg(L, i, to);
- }
-}
-
-void unpack_varargs_stack_skip(lua_State* L, int first, int last, int ints_to_skip, int floats_to_skip, char* to)
-{
- int i;
-
- for (i = first; i <= last; i++) {
- int type = lua_type(L, i);
-
- if (type == LUA_TNUMBER && --floats_to_skip >= 0) {
- continue;
- } else if (type != LUA_TNUMBER && --ints_to_skip >= 0) {
- continue;
- }
-
- to += unpack_vararg(L, i, to);
- }
-}
-
-void unpack_varargs_float(lua_State* L, int first, int last, int max, char* to)
-{
- int i;
-
- for (i = first; i <= last && max > 0; i++) {
- if (lua_type(L, i) == LUA_TNUMBER) {
- unpack_vararg(L, i, to);
- to += sizeof(double);
- max--;
- }
- }
-}
-
-void unpack_varargs_int(lua_State* L, int first, int last, int max, char* to)
-{
- int i;
-
- for (i = first; i <= last && max > 0; i++) {
- if (lua_type(L, i) != LUA_TNUMBER) {
- unpack_vararg(L, i, to);
- to += sizeof(void*);
- max--;
- }
- }
-}
-
-void unpack_varargs_reg(lua_State* L, int first, int last, char* to)
-{
- int i;
-
- for (i = first; i <= last; i++) {
- unpack_vararg(L, i, to);
- to += sizeof(double);
- }
-}
-
-/* to_enum tries to convert a value at idx to the enum type indicated by to_ct
- * and uv to_usr. For strings this means it will do a string lookup for the
- * enum type. It leaves the stack unchanged. Will throw an error if the type
- * at idx can't be conerted.
- */
-int32_t check_enum(lua_State* L, int idx, int to_usr, const struct ctype* to_ct)
-{
- int32_t ret;
-
- switch (lua_type(L, idx)) {
- case LUA_TSTRING:
- /* lookup string in to_usr to find value */
- to_usr = lua_absindex(L, to_usr);
- lua_pushvalue(L, idx);
- lua_rawget(L, to_usr);
-
- if (lua_isnil(L, -1)) {
- goto err;
- }
-
- ret = (int32_t) lua_tointeger(L, -1);
- lua_pop(L, 1);
- return ret;
-
- case LUA_TUSERDATA:
- return check_int32(L, idx);
-
- case LUA_TNIL:
- return (int32_t) 0;
-
- case LUA_TNUMBER:
- return (int32_t) lua_tointeger(L, idx);
-
- default:
- goto err;
- }
-
-err:
- return type_error(L, idx, NULL, to_usr, to_ct);
-}
-
-/* to_pointer tries converts a value at idx to a pointer. It fills out ct and
- * pushes the uv of the found type. It will throw a lua error if it can not
- * convert the value to a pointer. */
-static void* check_pointer(lua_State* L, int idx, struct ctype* ct)
-{
- void* p;
- memset(ct, 0, sizeof(*ct));
- idx = lua_absindex(L, idx);
-
- switch (lua_type(L, idx)) {
- case LUA_TNIL:
- ct->type = VOID_TYPE;
- ct->pointers = 1;
- ct->is_null = 1;
- lua_pushnil(L);
- return NULL;
-
- case LUA_TNUMBER:
- ct->type = INTPTR_TYPE;
- ct->is_unsigned = 1;
- ct->pointers = 0;
- lua_pushnil(L);
- return (void*) (uintptr_t) lua_tonumber(L, idx);
-
- case LUA_TLIGHTUSERDATA:
- ct->type = VOID_TYPE;
- ct->pointers = 1;
- lua_pushnil(L);
- return lua_touserdata(L, idx);
-
- case LUA_TSTRING:
- ct->type = INT8_TYPE;
- ct->pointers = 1;
- ct->is_unsigned = IS_CHAR_UNSIGNED;
- ct->is_array = 1;
- ct->base_size = 1;
- ct->const_mask = 2;
- lua_pushnil(L);
- return (void*) lua_tolstring(L, idx, &ct->array_size);
-
- case LUA_TUSERDATA:
- p = to_cdata(L, idx, ct);
-
- if (ct->type == INVALID_TYPE) {
- /* some other type of user data */
- ct->type = VOID_TYPE;
- ct->pointers = 1;
- return userdata_toptr(L, idx);
- } else if (ct->type == STRUCT_TYPE || ct->type == UNION_TYPE) {
- return p;
- } else {
- return (void*) (intptr_t) check_intptr(L, idx, p, ct);
- }
- break;
- }
-
- type_error(L, idx, "pointer", 0, NULL);
- return NULL;
-}
-
-static int is_void_ptr(const struct ctype* ct)
-{
- return ct->type == VOID_TYPE
- && ct->pointers == 1;
-}
-
-static int is_same_type(lua_State* L, int usr1, int usr2, const struct ctype* t1, const struct ctype* t2)
-{
- if (t1->type != t2->type) {
- return 0;
- }
-
-#if LUA_VERSION_NUM == 501
- if (lua_isnil(L, usr1) != lua_isnil(L, usr2)) {
- int ret;
- usr1 = lua_absindex(L, usr1);
- usr2 = lua_absindex(L, usr2);
- push_upval(L, &niluv_key);
-
- ret = lua_rawequal(L, usr1, -1)
- || lua_rawequal(L, usr2, -1);
-
- lua_pop(L, 1);
-
- if (ret) {
- return 1;
- }
- }
-#endif
-
- return lua_rawequal(L, usr1, usr2);
-}
-
-static void set_struct(lua_State* L, int idx, void* to, int to_usr, const struct ctype* tt, int check_pointers);
-
-/* to_typed_pointer converts a value at idx to a type tt with target uv to_usr
- * checking all types. May push a temporary value so that it can create
- * structs on the fly. */
-void* check_typed_pointer(lua_State* L, int idx, int to_usr, const struct ctype* tt)
-{
- struct ctype ft;
- void* p;
-
- to_usr = lua_absindex(L, to_usr);
- idx = lua_absindex(L, idx);
-
- if (tt->pointers == 1 && (tt->type == STRUCT_TYPE || tt->type == UNION_TYPE) && lua_type(L, idx) == LUA_TTABLE) {
- /* need to construct a struct of the target type */
- struct ctype ct = *tt;
- ct.pointers = ct.is_array = 0;
- p = push_cdata(L, to_usr, &ct);
- set_struct(L, idx, p, to_usr, &ct, 1);
- return p;
- }
-
- p = check_pointer(L, idx, &ft);
-
- if (tt->pointers == 1 && ft.pointers == 0 && (ft.type == STRUCT_TYPE || ft.type == UNION_TYPE)) {
- /* auto dereference structs */
- ft.pointers = 1;
- ft.const_mask <<= 1;
- }
-
- if (is_void_ptr(tt)) {
- /* any pointer can convert to void* */
- goto suc;
-
- } else if (is_void_ptr(&ft) && (ft.pointers || ft.is_reference)) {
- /* void* can convert to any pointer */
- goto suc;
-
- } else if (ft.is_null) {
- /* NULL can convert to any pointer */
- goto suc;
-
- } else if (!is_same_type(L, to_usr, -1, tt, &ft)) {
- /* the base type is different */
- goto err;
-
- } else if (tt->pointers != ft.pointers) {
- goto err;
-
- } else if (ft.const_mask & ~tt->const_mask) {
- /* for every const in from it must be in to, there are further rules
- * for const casting (see the c++ spec), but they are hard to test
- * quickly */
- goto err;
- }
-
-suc:
- return p;
-
-err:
- type_error(L, idx, NULL, to_usr, tt);
- return NULL;
-}
-
-/**
- * gets the address of the wrapped C function for the lua function value at idx
- * and returns 1 if it exists; otherwise returns 0 and nothing is pushed */
-static int get_cfunction_address(lua_State* L, int idx, cfunction* addr)
-{
- int top = 0;
- int n = 2;
- cfunction* f = NULL;
- if (!lua_isfunction(L, idx)) return 0;
-
- top = lua_gettop(L);
-
- // Get the last upvalue
- while (lua_getupvalue(L, idx, n)) {
- lua_pop(L, 1);
- n++;
- }
-
- if (!lua_getupvalue(L, idx, n - 1))
- return 0;
-
- if (!lua_isuserdata(L, -1) || !lua_getmetatable(L, -1)) {
- lua_pop(L, 1);
- return 0;
- }
-
- push_upval(L, &callback_mt_key);
- if (!lua_rawequal(L, -1, -2)) {
- lua_pop(L, 3);
- return 0;
- }
-
- /* stack is:
- * userdata upval
- * metatable
- * callback_mt
- */
-
- f = (cfunction*)lua_touserdata(L, -3);
- *addr = f[1];
- lua_pop(L, 3);
- return 1;
-}
-
-/* to_cfunction converts a value at idx with usr table at to_usr and type tt
- * into a function. Leaves the stack unchanged. */
-static cfunction check_cfunction(lua_State* L, int idx, int to_usr, const struct ctype* tt, int check_pointers)
-{
- void* p;
- struct ctype ft;
- cfunction f;
- int top = lua_gettop(L);
-
- idx = lua_absindex(L, idx);
- to_usr = lua_absindex(L, to_usr);
-
- switch (lua_type(L, idx)) {
- case LUA_TFUNCTION:
- if (get_cfunction_address(L, idx, &f)) {
- return f;
- }
-
- /* Function cdatas are pinned and must be manually cleaned up by
- * calling func:free(). */
- push_upval(L, &callbacks_key);
- f = compile_callback(L, idx, to_usr, tt);
- lua_pushboolean(L, 1);
- lua_rawset(L, -3);
- lua_pop(L, 1); /* callbacks tbl */
- return f;
-
- case LUA_TNIL:
- return NULL;
-
- case LUA_TLIGHTUSERDATA:
- if (check_pointers) {
- goto err;
- } else {
- return (cfunction) lua_touserdata(L, idx);
- }
-
- case LUA_TUSERDATA:
- p = to_cdata(L, idx, &ft);
- assert(lua_gettop(L) == top + 1);
-
- if (ft.type == INVALID_TYPE) {
- if (check_pointers) {
- goto err;
- } else {
- lua_pop(L, 1);
- return (cfunction) lua_touserdata(L, idx);
- }
-
- } else if (ft.is_null) {
- lua_pop(L, 1);
- return NULL;
-
- } else if (!check_pointers && (ft.pointers || ft.type == INTPTR_TYPE)) {
- lua_pop(L, 1);
- return (cfunction) *(void**) p;
-
- } else if (ft.type != FUNCTION_PTR_TYPE) {
- goto err;
-
- } else if (!check_pointers) {
- lua_pop(L, 1);
- return *(cfunction*) p;
-
- } else if (ft.calling_convention != tt->calling_convention) {
- goto err;
-
- } else if (!is_same_type(L, -1, to_usr, &ft, tt)) {
- goto err;
-
- } else {
- lua_pop(L, 1);
- return *(cfunction*) p;
- }
-
- default:
- goto err;
- }
-
-err:
- type_error(L, idx, NULL, to_usr, tt);
- return NULL;
-}
-
-/* to_type_cfunction converts a value at idx with uv at to_usr and type tt to
- * a cfunction. Leaves the stack unchanged. */
-cfunction check_typed_cfunction(lua_State* L, int idx, int to_usr, const struct ctype* tt)
-{ return check_cfunction(L, idx, to_usr, tt, 1); }
-
-static void set_value(lua_State* L, int idx, void* to, int to_usr, const struct ctype* tt, int check_pointers);
-
-static void set_array(lua_State* L, int idx, void* to, int to_usr, const struct ctype* tt, int check_pointers)
-{
- size_t i, sz, esz;
- struct ctype et;
-
- idx = lua_absindex(L, idx);
- to_usr = lua_absindex(L, to_usr);
-
- switch (lua_type(L, idx)) {
- case LUA_TSTRING:
- if (tt->pointers == 1 && tt->type == INT8_TYPE) {
- const char* str = lua_tolstring(L, idx, &sz);
-
- if (!tt->is_variable_array && sz >= tt->array_size) {
- memcpy(to, str, tt->array_size);
- } else {
- /* include nul terminator */
- memcpy(to, str, sz+1);
- }
- } else {
- goto err;
- }
- break;
-
- case LUA_TTABLE:
- et = *tt;
- et.pointers--;
- et.const_mask >>= 1;
- et.is_array = 0;
- esz = et.pointers ? sizeof(void*) : et.base_size;
-
- lua_rawgeti(L, idx, 2);
-
- if (tt->is_variable_array) {
- /* we have no idea how big the array is, so set values based off
- * how many items were given to us */
- lua_pop(L, 1);
- for (i = 0; i < lua_rawlen(L, idx); i++) {
- lua_rawgeti(L, idx, (int) i + 1);
- set_value(L, -1, (char*) to + esz * i, to_usr, &et, check_pointers);
- lua_pop(L, 1);
- }
-
- } else if (lua_isnil(L, -1)) {
- /* there is no second element, so we set the whole array to the
- * first element (or nil - ie 0) if there is no first element) */
- lua_pop(L, 1);
- lua_rawgeti(L, idx, 1);
-
- if (lua_isnil(L, -1)) {
- memset(to, 0, ctype_size(L, tt));
- } else {
- /* if its still variable we have no idea how many values to set */
- for (i = 0; i < tt->array_size; i++) {
- set_value(L, -1, (char*) to + esz * i, to_usr, &et, check_pointers);
- }
- }
-
- lua_pop(L, 1);
-
- } else {
- /* there is a second element, so we set each element using the
- * equiv index in the table initializer */
- lua_pop(L, 1);
- for (i = 0; i < tt->array_size; i++) {
- lua_rawgeti(L, idx, (int) (i+1));
-
- if (lua_isnil(L, -1)) {
- /* we've hit the end of the values provided in the
- * initializer, so memset the rest to zero */
- lua_pop(L, 1);
- memset((char*) to + esz * i, 0, (tt->array_size - i) * esz);
- break;
-
- } else {
- set_value(L, -1, (char*) to + esz * i, to_usr, &et, check_pointers);
- lua_pop(L, 1);
- }
- }
- }
- break;
-
- default:
- goto err;
- }
-
- return;
-
-err:
- type_error(L, idx, NULL, to_usr, tt);
-}
-
-/* pops the member key from the stack, leaves the member user value on the
- * stack. Returns the member offset. Returns -ve if the member can not be
- * found. */
-static ptrdiff_t get_member(lua_State* L, int usr, const struct ctype* ct, struct ctype* mt)
-{
- ptrdiff_t off;
- lua_rawget(L, usr);
-
- if (lua_isnil(L, -1)) {
- lua_pop(L, 1);
- return -1;
- }
-
- *mt = *(const struct ctype*) lua_touserdata(L, -1);
- lua_getuservalue(L, -1);
- lua_replace(L, -2);
-
- if (mt->is_variable_array && ct->variable_size_known) {
- /* eg char mbr[?] */
- size_t sz = (mt->pointers > 1) ? sizeof(void*) : mt->base_size;
- assert(ct->is_variable_struct && mt->is_array);
- mt->array_size = ct->variable_increment / sz;
- mt->is_variable_array = 0;
-
- } else if (mt->is_variable_struct && ct->variable_size_known) {
- /* eg struct {char a; char b[?]} mbr; */
- assert(ct->is_variable_struct);
- mt->variable_size_known = 1;
- mt->variable_increment = ct->variable_increment;
- }
-
- off = mt->offset;
- mt->offset = 0;
- return off;
-}
-
-static void set_struct(lua_State* L, int idx, void* to, int to_usr, const struct ctype* tt, int check_pointers)
-{
- int have_first = 0;
- int have_other = 0;
- struct ctype mt;
- void* p;
-
- to_usr = lua_absindex(L, to_usr);
- idx = lua_absindex(L, idx);
-
- switch (lua_type(L, idx)) {
- case LUA_TTABLE:
- /* match up to the members based off the table initializers key - this
- * will match both numbered and named members in the user table
- * we need a special case for when no entries in the initializer -
- * zero initialize the c struct, and only one entry in the initializer
- * - set all members to this value */
- memset(to, 0, ctype_size(L, tt));
- lua_pushnil(L);
- while (lua_next(L, idx)) {
- ptrdiff_t off;
-
- if (!have_first && lua_tonumber(L, -2) == 1 && lua_tonumber(L, -1) != 0) {
- have_first = 1;
- } else if (!have_other && (lua_type(L, -2) != LUA_TNUMBER || lua_tonumber(L, -2) != 1)) {
- have_other = 1;
- }
-
- lua_pushvalue(L, -2);
- off = get_member(L, to_usr, tt, &mt);
- assert(off >= 0);
- set_value(L, -2, (char*) to + off, -1, &mt, check_pointers);
-
- /* initializer value, mt usr */
- lua_pop(L, 2);
- }
-
- /* if we only had a single non zero value then initialize all members to that value */
- if (!have_other && have_first && tt->type != UNION_TYPE) {
- size_t i, sz;
- ptrdiff_t off;
- lua_rawgeti(L, idx, 1);
- sz = lua_rawlen(L, to_usr);
-
- for (i = 2; i < sz; i++) {
- lua_pushinteger(L, i);
- off = get_member(L, to_usr, tt, &mt);
- assert(off >= 0);
- set_value(L, -2, (char*) to + off, -1, &mt, check_pointers);
- lua_pop(L, 1); /* mt usr */
- }
-
- lua_pop(L, 1); /* initializer table */
- }
- break;
-
- case LUA_TUSERDATA:
- if (check_pointers) {
- p = check_typed_pointer(L, idx, to_usr, tt);
- } else {
- struct ctype ct;
- p = check_pointer(L, idx, &ct);
- }
- memcpy(to, p, tt->base_size);
- lua_pop(L, 1);
- break;
-
- default:
- goto err;
- }
-
- return;
-
-err:
- type_error(L, idx, NULL, to_usr, tt);
-}
-
-static void set_value(lua_State* L, int idx, void* to, int to_usr, const struct ctype* tt, int check_pointers)
-{
- int top = lua_gettop(L);
-
- if (tt->is_array) {
- set_array(L, idx, to, to_usr, tt, check_pointers);
-
- } else if (tt->pointers || tt->is_reference) {
- union {
- uint8_t c[sizeof(void*)];
- void* p;
- } u;
-
- if (lua_istable(L, idx)) {
- luaL_error(L, "Can't set a pointer member to a struct that's about to be freed");
- }
-
- if (check_pointers) {
- u.p = check_typed_pointer(L, idx, to_usr, tt);
- } else {
- struct ctype ct;
- u.p = check_pointer(L, idx, &ct);
- }
-
-#ifndef ALLOW_MISALIGNED_ACCESS
- if ((uintptr_t) to & PTR_ALIGN_MASK) {
- memcpy(to, u.c, sizeof(void*));
- } else
-#endif
- {
- *(void**) to = u.p;
- }
-
- lua_pop(L, 1);
-
- } else if (tt->is_bitfield) {
-
- uint64_t hi_mask = UINT64_C(0) - (UINT64_C(1) << (tt->bit_offset + tt->bit_size));
- uint64_t low_mask = (UINT64_C(1) << tt->bit_offset) - UINT64_C(1);
- uint64_t val = check_uint64(L, idx);
- val &= (UINT64_C(1) << tt->bit_size) - 1;
- val <<= tt->bit_offset;
- *(uint64_t*) to = val | (*(uint64_t*) to & (hi_mask | low_mask));
-
- } else if (tt->type == STRUCT_TYPE || tt->type == UNION_TYPE) {
- set_struct(L, idx, to, to_usr, tt, check_pointers);
-
- } else {
-
-#ifndef ALLOW_MISALIGNED_ACCESS
- union {
- uint8_t c[8];
- _Bool b;
- uint64_t u64;
- float f;
- double d;
- cfunction func;
- } misalign;
-
- void* origto = to;
-
- if ((uintptr_t) origto & (tt->base_size - 1)) {
- to = misalign.c;
- }
-#endif
-
- switch (tt->type) {
- case BOOL_TYPE:
- *(_Bool*) to = (cast_int64(L, idx, !check_pointers) != 0);
- break;
- case INT8_TYPE:
- if (tt->is_unsigned) {
- *(uint8_t*) to = (uint8_t) cast_uint64(L, idx, !check_pointers);
- } else {
- *(int8_t*) to = (int8_t) cast_int64(L, idx, !check_pointers);
- }
- break;
- case INT16_TYPE:
- if (tt->is_unsigned) {
- *(uint16_t*) to = (uint16_t) cast_uint64(L, idx, !check_pointers);
- } else {
- *(int16_t*) to = (int16_t) cast_int64(L, idx, !check_pointers);
- }
- break;
- case INT32_TYPE:
- if (tt->is_unsigned) {
- *(uint32_t*) to = (uint32_t) cast_uint64(L, idx, !check_pointers);
- } else {
- *(int32_t*) to = (int32_t) cast_int64(L, idx, !check_pointers);
- }
- break;
- case INT64_TYPE:
- if (tt->is_unsigned) {
- *(uint64_t*) to = cast_uint64(L, idx, !check_pointers);
- } else {
- *(int64_t*) to = cast_int64(L, idx, !check_pointers);
- }
- break;
- case FLOAT_TYPE:
- *(float*) to = (float) check_double(L, idx);
- break;
- case DOUBLE_TYPE:
- *(double*) to = check_double(L, idx);
- break;
- case COMPLEX_FLOAT_TYPE:
- *(complex_float*) to = check_complex_float(L, idx);
- break;
- case COMPLEX_DOUBLE_TYPE:
- *(complex_double*) to = check_complex_double(L, idx);
- break;
- case INTPTR_TYPE:
- *(uintptr_t*) to = check_uintptr(L, idx);
- break;
- case ENUM_TYPE:
- *(int32_t*) to = check_enum(L, idx, to_usr, tt);
- break;
- case FUNCTION_PTR_TYPE:
- *(cfunction*) to = check_cfunction(L, idx, to_usr, tt, check_pointers);
- break;
- default:
- goto err;
- }
-
-#ifndef ALLOW_MISALIGNED_ACCESS
- if ((uintptr_t) origto & (tt->base_size - 1)) {
- memcpy(origto, misalign.c, tt->base_size);
- }
-#endif
- }
-
- assert(lua_gettop(L) == top);
- return;
-err:
- type_error(L, idx, NULL, to_usr, tt);
-}
-
-static int ffi_typeof(lua_State* L)
-{
- struct ctype ct;
- check_ctype(L, 1, &ct);
- push_ctype(L, -1, &ct);
- return 1;
-}
-
-static void setmintop(lua_State* L, int idx)
-{
- if (lua_gettop(L) < idx) {
- lua_settop(L, idx);
- }
-}
-
-/* warning: in the case that it finds an array size, it removes that index */
-static void get_variable_array_size(lua_State* L, int idx, struct ctype* ct)
-{
- /* we only care about the variable buisness for the variable array
- * directly ie ffi.new('char[?]') or the struct that contains the variable
- * array ffi.new('struct {char v[?]}'). A pointer to the struct doesn't
- * care about the variable size (it treats it as a zero sized array). */
-
- if (ct->is_variable_array) {
- assert(ct->is_array);
- ct->array_size = (size_t) luaL_checknumber(L, idx);
- ct->is_variable_array = 0;
- lua_remove(L, idx);
-
- } else if (ct->is_variable_struct && !ct->variable_size_known) {
- assert(ct->type == STRUCT_TYPE && !ct->is_array);
- ct->variable_increment *= (size_t) luaL_checknumber(L, idx);
- ct->variable_size_known = 1;
- lua_remove(L, idx);
- }
-}
-
-static int is_scalar(struct ctype* ct)
-{
- int type = ct->type;
- if (ct->pointers || ct->is_reference) {
- return !ct->is_array;
- }
- return type != STRUCT_TYPE && type != UNION_TYPE && !IS_COMPLEX(type);
-}
-
-static int should_pack(lua_State *L, int ct_usr, struct ctype* ct, int idx)
-{
- struct ctype argt;
- int same = 0;
- ct_usr = lua_absindex(L, ct_usr);
-
- if (IS_COMPLEX(ct->type)) {
- return 0;
- }
-
- switch (lua_type(L, idx)) {
- case LUA_TTABLE:
- return 0;
- case LUA_TSTRING:
- return ct->type == STRUCT_TYPE;
- case LUA_TUSERDATA:
- // don't pack if the argument is a cdata with the same type
- to_cdata(L, idx, &argt);
- same = is_same_type(L, ct_usr, -1, ct, &argt);
- lua_pop(L, 1);
- return !same;
- default:
- return 1;
- }
-}
-
-static int do_new(lua_State* L, int is_cast)
-{
- int cargs, i;
- void* p;
- struct ctype ct;
- int check_ptrs = !is_cast;
- int scalar = 0;
-
- check_ctype(L, 1, &ct);
-
- /* don't push a callback when we have a c function, as cb:set needs a
- * compiled callback from a lua function to work */
- if (!ct.pointers && ct.type == FUNCTION_PTR_TYPE && (lua_isnil(L, 2) || lua_isfunction(L, 2))) {
- // Get the bound C function if this is a ffi lua function
- cfunction func;
- if (get_cfunction_address(L, 2, &func)) {
- p = push_cdata(L, -1, &ct);
- *(cfunction*) p = func;
- return 1;
- }
-
- /* Function cdatas are pinned and must be manually cleaned up by
- * calling func:free(). */
- compile_callback(L, 2, -1, &ct);
- push_upval(L, &callbacks_key);
- lua_pushvalue(L, -2);
- lua_pushboolean(L, 1);
- lua_rawset(L, -3);
- lua_pop(L, 1); /* callbacks tbl */
- return 1;
- }
-
- /* this removes the vararg argument if its needed, and errors if its invalid */
- if (!is_cast) {
- get_variable_array_size(L, 2, &ct);
- }
-
- p = push_cdata(L, -1, &ct);
-
- /* if the user mt has a __gc function then call ffi.gc on this value */
- if (push_user_mt(L, -2, &ct)) {
- push_upval(L, &gc_key);
- lua_pushvalue(L, -3);
-
- /* user_mt.__gc */
- lua_pushliteral(L, "__gc");
- lua_rawget(L, -4);
-
- lua_rawset(L, -3); /* gc_upval[cdata] = user_mt.__gc */
- lua_pop(L, 2); /* user_mt and gc_upval */
- }
-
- /* stack is:
- * ctype arg
- * ctor args ... 0+
- * ctype usr
- * cdata
- */
-
- cargs = lua_gettop(L) - 3;
-
- if (cargs == 0) {
- return 1;
- }
-
- scalar = is_scalar(&ct);
- if (scalar && cargs > 1) {
- return luaL_error(L, "too many initializers");
- }
-
- if (cargs > 1 || (!scalar && should_pack(L, -2, &ct, 2))) {
- lua_createtable(L, cargs, 0);
- lua_replace(L, 1);
- for (i = 1; i <= cargs; i++) {
- lua_pushvalue(L, i + 1);
- lua_rawseti(L, 1, i);
- }
- assert(lua_gettop(L) == cargs + 3);
- set_value(L, 1, p, -2, &ct, check_ptrs);
- return 1;
- }
-
- set_value(L, 2, p, -2, &ct, check_ptrs);
- return 1;
-}
-
-static int ffi_new(lua_State* L)
-{ return do_new(L, 0); }
-
-static int ffi_cast(lua_State* L)
-{ return do_new(L, 1); }
-
-static int ctype_new(lua_State* L)
-{ return do_new(L, 0); }
-
-static int ctype_call(lua_State* L)
-{
- struct ctype ct;
- int top = lua_gettop(L);
-
- check_ctype(L, 1, &ct);
-
- if (push_user_mt(L, -1, &ct)) {
- lua_pushstring(L, "__new");
- lua_rawget(L, -2);
- if (!lua_isnil(L, -1)) {
- lua_insert(L, 1); // function at bottom of stack under args
- lua_pop(L, 2);
- lua_call(L, top, 1);
- return 1;
- }
- lua_pop(L, 2);
- }
- lua_pop(L, 1);
-
- assert(lua_gettop(L) == top);
- return do_new(L, 0);
-}
-
-static int ffi_sizeof(lua_State* L)
-{
- struct ctype ct;
- check_ctype(L, 1, &ct);
- get_variable_array_size(L, 2, &ct);
- lua_pushinteger(L, ctype_size(L, &ct));
- return 1;
-}
-
-static int ffi_alignof(lua_State* L)
-{
- struct ctype ct, mt;
- lua_settop(L, 2);
- check_ctype(L, 1, &ct);
-
- /* if no member is specified then we return the alignment of the type */
- if (lua_isnil(L, 2)) {
- lua_pushinteger(L, ct.align_mask + 1);
- return 1;
- }
-
- /* get the alignment of the member */
- lua_pushvalue(L, 2);
- if (get_member(L, -2, &ct, &mt) < 0) {
- push_type_name(L, 3, &ct);
- return luaL_error(L, "type %s has no member %s", lua_tostring(L, -1), lua_tostring(L, 2));
- }
-
- lua_pushinteger(L, mt.align_mask + 1);
- return 1;
-}
-
-static int ffi_offsetof(lua_State* L)
-{
- ptrdiff_t off;
- struct ctype ct, mt;
- lua_settop(L, 2);
- check_ctype(L, 1, &ct);
-
- lua_pushvalue(L, 2);
- off = get_member(L, -2, &ct, &mt); /* this replaces the member key at -1 with the mbr usr value */
- if (off < 0) {
- push_type_name(L, 3, &ct);
- return luaL_error(L, "type %s has no member %s", lua_tostring(L, -1), lua_tostring(L, 2));
- }
-
- lua_pushinteger(L, off);
-
- if (!mt.is_bitfield) {
- return 1;
- }
-
- lua_pushinteger(L, mt.bit_offset);
- lua_pushinteger(L, mt.bit_size);
- return 3;
-}
-
-static int ffi_istype(lua_State* L)
-{
- struct ctype tt, ft;
- check_ctype(L, 1, &tt);
- to_cdata(L, 2, &ft);
-
- if (ft.type == INVALID_TYPE) {
- goto fail;
- }
-
- if (!is_same_type(L, 3, 4, &tt, &ft)) {
- goto fail;
- }
-
- if (tt.pointers != ft.pointers) {
- goto fail;
- }
-
- if (tt.is_array != ft.is_array) {
- goto fail;
- }
-
- if (tt.is_array && tt.array_size != ft.array_size) {
- goto fail;
- }
-
- if (tt.calling_convention != ft.calling_convention) {
- goto fail;
- }
-
- lua_pushboolean(L, 1);
- return 1;
-
-fail:
- lua_pushboolean(L, 0);
- return 1;
-}
-
-static int cdata_gc(lua_State* L)
-{
- struct ctype ct;
- check_cdata(L, 1, &ct);
- lua_settop(L, 1);
-
- /* call the gc func if there is any registered */
- lua_pushvalue(L, 1);
- lua_rawget(L, lua_upvalueindex(2));
- if (!lua_isnil(L, -1)) {
- lua_pushvalue(L, 1);
- lua_pcall(L, 1, 0, 0);
- }
-
- /* unset the closure */
- lua_pushvalue(L, 1);
- lua_pushnil(L);
- lua_rawset(L, lua_upvalueindex(1));
-
- return 0;
-}
-
-static int callback_free(lua_State* L)
-{
- cfunction* p = (cfunction*) lua_touserdata(L, 1);
- // FIXME: temporarily disabled to prevent SIGTRAP on exit
- // free_code(get_jit(L), L, *p);
- return 0;
-}
-
-static int cdata_free(lua_State* L)
-{
- struct ctype ct;
- cfunction* p = (cfunction*) check_cdata(L, 1, &ct);
- lua_settop(L, 1);
-
- /* unset the closure */
- lua_pushvalue(L, 1);
- lua_pushnil(L);
- lua_rawset(L, lua_upvalueindex(1));
-
- if (ct.is_jitted) {
- free_code(get_jit(L), L, *p);
- *p = NULL;
- }
-
- return 0;
-}
-
-static int cdata_set(lua_State* L)
-{
- struct ctype ct;
- cfunction* p = (cfunction*) check_cdata(L, 1, &ct);
- luaL_checktype(L, 2, LUA_TFUNCTION);
-
- if (!ct.is_jitted) {
- luaL_error(L, "can't set the function for a non-lua callback");
- }
-
- if (*p == NULL) {
- luaL_error(L, "can't set the function for a free'd callback");
- }
-
- push_func_ref(L, *p);
- lua_pushvalue(L, 2);
- lua_rawseti(L, -2, CALLBACK_FUNC_USR_IDX);
-
- /* remove the closure for this callback as it embeds the function pointer
- * value */
- lua_pushvalue(L, 1);
- lua_pushboolean(L, 1);
- lua_rawset(L, lua_upvalueindex(1));
-
- return 0;
-}
-
-static int cdata_call(lua_State* L)
-{
- struct ctype ct;
- int top = lua_gettop(L);
- cfunction* p = (cfunction*) check_cdata(L, 1, &ct);
-
- if (push_user_mt(L, -1, &ct)) {
- lua_pushliteral(L, "__call");
- lua_rawget(L, -2);
-
- if (!lua_isnil(L, -1)) {
- lua_insert(L, 1);
- lua_pop(L, 2); /* ct_usr, user_mt */
- lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
- return lua_gettop(L);
- }
- }
- if (ct.pointers || ct.type != FUNCTION_PTR_TYPE) {
- return luaL_error(L, "only function callbacks are callable");
- }
-
- lua_pushvalue(L, 1);
- lua_rawget(L, lua_upvalueindex(1));
-
- if (!lua_isfunction(L, -1)) {
- lua_pop(L, 1);
- compile_function(L, *p, -1, &ct);
-
- assert(lua_gettop(L) == top + 2); /* uv, closure */
-
- /* closures[func] = closure */
- lua_pushvalue(L, 1);
- lua_pushvalue(L, -2);
- lua_rawset(L, lua_upvalueindex(1));
-
- lua_replace(L, 1);
- } else {
- lua_replace(L, 1);
- }
-
- lua_pop(L, 1); /* uv */
- assert(lua_gettop(L) == top);
-
- lua_call(L, lua_gettop(L) - 1, LUA_MULTRET);
- return lua_gettop(L);
-}
-
-static int user_mt_key;
-
-static int ffi_metatype(lua_State* L)
-{
- struct ctype ct;
- lua_settop(L, 2);
-
- check_ctype(L, 1, &ct);
- if (lua_type(L, 2) != LUA_TTABLE && lua_type(L, 2) != LUA_TNIL) {
- return luaL_argerror(L, 2, "metatable must be a table or nil");
- }
-
- lua_pushlightuserdata(L, &user_mt_key);
- lua_pushvalue(L, 2);
- lua_rawset(L, 3); /* user[user_mt_key] = mt */
-
- /* return the passed in ctype */
- push_ctype(L, 3, &ct);
- return 1;
-}
-
-/* push_user_mt returns 1 if the type has a user metatable and pushes it onto
- * the stack, otherwise it returns 0 and pushes nothing */
-int push_user_mt(lua_State* L, int ct_usr, const struct ctype* ct)
-{
- if (ct->type != STRUCT_TYPE && ct->type != UNION_TYPE && !IS_COMPLEX(ct->type)) {
- return 0;
- }
- if (!lua_istable(L, ct_usr)) {
- return 0;
- }
-
- ct_usr = lua_absindex(L, ct_usr);
- lua_pushlightuserdata(L, &user_mt_key);
- lua_rawget(L, ct_usr);
-
- if (lua_isnil(L, -1)) {
- lua_pop(L, 1);
- return 0;
- }
- return 1;
-}
-
-static int ffi_gc(lua_State* L)
-{
- struct ctype ct;
- lua_settop(L, 2);
- check_cdata(L, 1, &ct);
-
- push_upval(L, &gc_key);
- lua_pushvalue(L, 1);
- lua_pushvalue(L, 2);
- lua_rawset(L, -3);
-
- /* return the cdata back */
- lua_settop(L, 1);
- return 1;
-}
-
-/* lookup_cdata_index returns the offset of the found type and user value on
- * the stack if valid. Otherwise returns -ve and doesn't touch the stack.
- */
-static ptrdiff_t lookup_cdata_index(lua_State* L, int idx, int ct_usr, struct ctype* ct)
-{
- struct ctype mt;
- ptrdiff_t off;
- int type = 0;
-
- ct_usr = lua_absindex(L, ct_usr);
- type = lua_type(L, idx);
-
- switch (type) {
- case LUA_TNUMBER:
- case LUA_TUSERDATA:
- /* possibilities are array, pointer */
-
- if (!ct->pointers || is_void_ptr(ct)) {
- return -1;
- }
-
- // unbox cdata
- if (type == LUA_TUSERDATA) {
- if (!cdata_tointeger(L, idx, &off)) {
- return -1;
- }
- } else {
- off = lua_tointeger(L, idx);
- }
-
- ct->is_array = 0;
- ct->pointers--;
- ct->const_mask >>= 1;
- ct->is_reference = 0;
-
- lua_pushvalue(L, ct_usr);
-
- return (ct->pointers ? sizeof(void*) : ct->base_size) * off;
-
- case LUA_TSTRING:
- /* possibilities are struct/union, pointer to struct/union */
-
- if ((ct->type != STRUCT_TYPE && ct->type != UNION_TYPE) || ct->is_array || ct->pointers > 1) {
- return -1;
- }
-
- lua_pushvalue(L, idx);
- off = get_member(L, ct_usr, ct, &mt);
- if (off < 0) {
- return -1;
- }
-
- *ct = mt;
- return off;
-
- default:
- return -1;
- }
-}
-
-static int cdata_newindex(lua_State* L)
-{
- struct ctype tt;
- char* to;
- ptrdiff_t off;
-
- lua_settop(L, 3);
-
- to = (char*) check_cdata(L, 1, &tt);
- off = lookup_cdata_index(L, 2, -1, &tt);
-
- if (off < 0) {
- if (!push_user_mt(L, -1, &tt)) {
- goto err;
- }
-
- lua_pushliteral(L, "__newindex");
- lua_rawget(L, -2);
-
- if (lua_isnil(L, -1)) {
- goto err;
- }
-
- lua_insert(L, 1);
- lua_settop(L, 4);
- lua_call(L, 3, LUA_MULTRET);
- return lua_gettop(L);
- }
-
- if (tt.const_mask & 1) {
- return luaL_error(L, "can't set const data");
- }
-
- set_value(L, 3, to + off, -1, &tt, 1);
- return 0;
-
-err:
- push_type_name(L, 4, &tt);
- return luaL_error(L, "type %s has no member %s", lua_tostring(L, -1), lua_tostring(L, 2));
-}
-
-static int cdata_index(lua_State* L)
-{
- void* to;
- struct ctype ct;
- char* data;
- ptrdiff_t off;
-
- lua_settop(L, 2);
- data = (char*) check_cdata(L, 1, &ct);
- assert(lua_gettop(L) == 3);
-
- if (!ct.pointers) {
- switch (ct.type) {
- case FUNCTION_PTR_TYPE:
- /* Callbacks use the same metatable as standard cdata values, but have set
- * and free members. So instead of mt.__index = mt, we do the equiv here. */
- lua_getmetatable(L, 1);
- lua_pushvalue(L, 2);
- lua_rawget(L, -2);
- return 1;
-
- /* This provides the .re and .im virtual members */
- case COMPLEX_DOUBLE_TYPE:
- case COMPLEX_FLOAT_TYPE:
- if (!lua_isstring(L, 2)) {
- luaL_error(L, "invalid member for complex number");
-
- } else if (strcmp(lua_tostring(L, 2), "re") == 0) {
- lua_pushnumber(L, ct.type == COMPLEX_DOUBLE_TYPE ? creal(*(complex_double*) data) : crealf(*(complex_float*) data));
-
- } else if (strcmp(lua_tostring(L, 2), "im") == 0) {
- lua_pushnumber(L, ct.type == COMPLEX_DOUBLE_TYPE ? cimag(*(complex_double*) data) : cimagf(*(complex_float*) data));
-
- } else {
- luaL_error(L, "invalid member for complex number");
- }
- return 1;
- }
- }
-
- off = lookup_cdata_index(L, 2, -1, &ct);
-
- if (off < 0) {
- assert(lua_gettop(L) == 3);
- if (!push_user_mt(L, -1, &ct)) {
- goto err;
- }
-
- lua_pushliteral(L, "__index");
- lua_rawget(L, -2);
-
- if (lua_isnil(L, -1)) {
- goto err;
- }
-
- if (lua_istable(L, -1)) {
- lua_pushvalue(L, 2);
- lua_gettable(L, -2);
- return 1;
- }
-
- lua_insert(L, 1);
- lua_settop(L, 3);
- lua_call(L, 2, LUA_MULTRET);
- return lua_gettop(L);
-
-err:
- push_type_name(L, 3, &ct);
- return luaL_error(L, "type %s has no member %s", lua_tostring(L, -1), lua_tostring(L, 2));
- }
-
- assert(lua_gettop(L) == 4); /* ct, key, ct_usr, mbr_usr */
- data += off;
-
- if (ct.is_array) {
- /* push a reference to the array */
- ct.is_reference = 1;
- to = push_cdata(L, -1, &ct);
- *(void**) to = data;
- return 1;
-
- } else if (ct.is_bitfield) {
-
- if (ct.type == INT64_TYPE) {
- struct ctype rt;
- uint64_t val = *(uint64_t*) data;
- val >>= ct.bit_offset;
- val &= (UINT64_C(1) << ct.bit_size) - 1;
-
- memset(&rt, 0, sizeof(rt));
- rt.base_size = 8;
- rt.type = INT64_TYPE;
- rt.is_unsigned = 1;
- rt.is_defined = 1;
-
- to = push_cdata(L, 0, &rt);
- *(uint64_t*) to = val;
-
- return 1;
-
- } else if (ct.type == BOOL_TYPE) {
- uint64_t val = *(uint64_t*) data;
- lua_pushboolean(L, (int) (val & (UINT64_C(1) << ct.bit_offset)));
- return 1;
-
- } else {
- uint64_t val = *(uint64_t*) data;
- val >>= ct.bit_offset;
- val &= (UINT64_C(1) << ct.bit_size) - 1;
- lua_pushinteger(L, val);
- return 1;
- }
-
- } else if (ct.pointers) {
-#ifndef ALLOW_MISALIGNED_ACCESS
- union {
- uint8_t c[8];
- void* p;
- } misalignbuf;
-
- if ((uintptr_t) data & PTR_ALIGN_MASK) {
- memcpy(misalignbuf.c, data, sizeof(void*));
- data = misalignbuf.c;
- }
-#endif
- to = push_cdata(L, -1, &ct);
- *(void**) to = *(void**) data;
- return 1;
-
- } else if (ct.type == STRUCT_TYPE || ct.type == UNION_TYPE) {
- /* push a reference to the member */
- ct.is_reference = 1;
- to = push_cdata(L, -1, &ct);
- *(void**) to = data;
- return 1;
-
- } else if (ct.type == FUNCTION_PTR_TYPE) {
- cfunction* pf = (cfunction*) push_cdata(L, -1, &ct);
- *pf = *(cfunction*) data;
- return 1;
-
- } else {
-#ifndef ALLOW_MISALIGNED_ACCESS
- union {
- uint8_t c[8];
- double d;
- float f;
- uint64_t u64;
- } misalignbuf;
-
- assert(ct.base_size <= 8);
-
- if ((uintptr_t) data & (ct.base_size - 1)) {
- memcpy(misalignbuf.c, data, ct.base_size);
- data = misalignbuf.c;
- }
-#endif
-
- switch (ct.type) {
- case BOOL_TYPE:
- lua_pushboolean(L, *(_Bool*) data);
- break;
- case INT8_TYPE:
- lua_pushinteger(L, ct.is_unsigned ? (lua_Integer) *(uint8_t*) data : (lua_Integer) *(int8_t*) data);
- break;
- case INT16_TYPE:
- lua_pushinteger(L, ct.is_unsigned ? (lua_Integer) *(uint16_t*) data : (lua_Integer) *(int16_t*) data);
- break;
- case ENUM_TYPE:
- case INT32_TYPE:
- lua_pushinteger(L, ct.is_unsigned ? (lua_Integer) *(uint32_t*) data : (lua_Integer) *(int32_t*) data);
- break;
- case INT64_TYPE:
- to = push_cdata(L, -1, &ct);
- *(int64_t*) to = *(int64_t*) data;
- break;
- case INTPTR_TYPE:
- to = push_cdata(L, -1, &ct);
- *(intptr_t*) to = *(intptr_t*) data;
- break;
- case FLOAT_TYPE:
- lua_pushnumber(L, *(float*) data);
- break;
- case DOUBLE_TYPE:
- lua_pushnumber(L, *(double*) data);
- break;
- case COMPLEX_DOUBLE_TYPE:
- to = push_cdata(L, -1, &ct);
- *(complex_double*) to = *(complex_double*) data;
- break;
- case COMPLEX_FLOAT_TYPE:
- to = push_cdata(L, -1, &ct);
- *(complex_float*) to = *(complex_float*) data;
- break;
- default:
- luaL_error(L, "internal error: invalid member type");
- }
-
- return 1;
- }
-}
-
-static complex_double check_complex(lua_State* L, int idx, void* p, struct ctype* ct)
-{
- if (ct->type == INVALID_TYPE) {
- double d = luaL_checknumber(L, idx);
-#ifdef HAVE_COMPLEX
- return d;
-#else
- complex_double c;
- c.real = d;
- c.imag = 0;
- return c;
-#endif
- } else if (ct->type == COMPLEX_DOUBLE_TYPE) {
- return *(complex_double*) p;
- } else if (ct->type == COMPLEX_FLOAT_TYPE) {
- complex_float* f = (complex_float*) p;
-#ifdef HAVE_COMPLEX
- return *f;
-#else
- complex_double d;
- d.real = f->real;
- d.imag = f->imag;
- return d;
-#endif
- } else {
- complex_double dummy;
- type_error(L, idx, "complex", 0, NULL);
- memset(&dummy, 0, sizeof(dummy));
- return dummy;
- }
-}
-
-static int rank(const struct ctype* ct)
-{
- if (ct->pointers) {
- return 5;
- }
-
- switch (ct->type) {
- case COMPLEX_DOUBLE_TYPE:
- return 7;
- case COMPLEX_FLOAT_TYPE:
- return 6;
- case INTPTR_TYPE:
- return sizeof(intptr_t) >= sizeof(int64_t) ? 4 : 1;
- case INT64_TYPE:
- return ct->is_unsigned ? 3 : 2;
- case INT32_TYPE:
- case INT16_TYPE:
- case INT8_TYPE:
- return 2;
- default:
- return 0;
- }
-}
-
-static void push_complex(lua_State* L, complex_double res, int ct_usr, const struct ctype* ct)
-{
- if (ct->type == COMPLEX_DOUBLE_TYPE) {
- complex_double* p = (complex_double*) push_cdata(L, ct_usr, ct);
- *p = res;
- } else {
- complex_float* p = (complex_float*) push_cdata(L, ct_usr, ct);
-#ifdef HAVE_COMPLEX
- *p = (complex float) res;
-#else
- p->real = (float) res.real;
- p->imag = (float) res.imag;
-#endif
- }
-}
-
-static void push_number(lua_State* L, int64_t val, int ct_usr, const struct ctype* ct)
-{
- if ((ct->pointers || ct->type == INTPTR_TYPE) && sizeof(intptr_t) != sizeof(int64_t)) {
- intptr_t* p = (intptr_t*) push_cdata(L, ct_usr, ct);
- *p = val;
- } else {
- int64_t* p = (int64_t*) push_cdata(L, ct_usr, ct);
- *p = val;
- }
-}
-
-static int call_user_op(lua_State* L, const char* opfield, int idx, int ct_usr, const struct ctype* ct)
-{
- idx = lua_absindex(L, idx);
-
- if (push_user_mt(L, ct_usr, ct)) {
- lua_pushstring(L, opfield);
- lua_rawget(L, -2);
- if (!lua_isnil(L, -1)) {
- int top = lua_gettop(L);
- lua_pushvalue(L, idx);
- lua_call(L, 1, LUA_MULTRET);
- return lua_gettop(L) - top + 1;
- }
- lua_pop(L, 2);
- }
- return -1;
-}
-
-static int cdata_unm(lua_State* L)
-{
- struct ctype ct;
- void* p;
- int64_t val;
- int ret;
-
- lua_settop(L, 1);
- p = to_cdata(L, 1, &ct);
-
- ret = call_user_op(L, "__unm", 1, 2, &ct);
- if (ret >= 0) {
- return ret;
- }
-
- val = check_intptr(L, 1, p, &ct);
-
- if (ct.pointers) {
- luaL_error(L, "can't negate a pointer value");
- } else {
- memset(&ct, 0, sizeof(ct));
- ct.type = INT64_TYPE;
- ct.base_size = 8;
- ct.is_defined = 1;
- push_number(L, -val, 0, &ct);
- }
-
- return 1;
-}
-
-/* returns -ve if no binop was called otherwise returns the number of return
- * arguments */
-static int call_user_binop(lua_State* L, const char* opfield, int lidx, int lusr, const struct ctype* lt, int ridx, int rusr, const struct ctype* rt)
-{
- lidx = lua_absindex(L, lidx);
- ridx = lua_absindex(L, ridx);
-
- if (push_user_mt(L, lusr, lt)) {
- lua_pushstring(L, opfield);
- lua_rawget(L, -2);
-
- if (!lua_isnil(L, -1)) {
- int top = lua_gettop(L);
- lua_pushvalue(L, lidx);
- lua_pushvalue(L, ridx);
- lua_call(L, 2, LUA_MULTRET);
- return lua_gettop(L) - top + 1;
- }
-
- lua_pop(L, 2); /* user_mt and user_mt.op */
- }
-
- if (push_user_mt(L, rusr, rt)) {
- lua_pushstring(L, opfield);
- lua_rawget(L, -2);
-
- if (!lua_isnil(L, -1)) {
- int top = lua_gettop(L);
- lua_pushvalue(L, lidx);
- lua_pushvalue(L, ridx);
- lua_call(L, 2, LUA_MULTRET);
- return lua_gettop(L) - top + 1;
- }
-
- lua_pop(L, 2); /* user_mt and user_mt.op */
- }
-
- return -1;
-}
-
-static int cdata_concat(lua_State* L)
-{
- struct ctype lt, rt;
- int ret;
-
- lua_settop(L, 2);
- to_cdata(L, 1, <);
- to_cdata(L, 2, &rt);
-
- ret = call_user_binop(L, "__concat", 1, 3, <, 2, 4, &rt);
- if (ret >= 0) {
- return ret;
- }
-
- return luaL_error(L, "NYI");
-}
-
-static int cdata_len(lua_State* L)
-{
- struct ctype ct;
- int ret;
-
- lua_settop(L, 1);
- to_cdata(L, 1, &ct);
-
- ret = call_user_op(L, "__len", 1, 2, &ct);
- if (ret >= 0) {
- return ret;
- }
-
- push_type_name(L, 2, &ct);
- return luaL_error(L, "type %s does not implement the __len metamethod", lua_tostring(L, -1));
-}
-
-static int cdata_pairs(lua_State* L)
-{
- struct ctype ct;
- int ret;
-
- lua_settop(L, 1);
- to_cdata(L, 1, &ct);
-
- ret = call_user_op(L, "__pairs", 1, 2, &ct);
- if (ret >= 0) {
- return ret;
- }
-
- push_type_name(L, 2, &ct);
- return luaL_error(L, "type %s does not implement the __pairs metamethod", lua_tostring(L, -1));
-}
-
-static int cdata_ipairs(lua_State* L)
-{
- struct ctype ct;
- int ret;
-
- lua_settop(L, 1);
- to_cdata(L, 1, &ct);
-
- ret = call_user_op(L, "__ipairs", 1, 2, &ct);
- if (ret >= 0) {
- return ret;
- }
-
- push_type_name(L, 2, &ct);
- return luaL_error(L, "type %s does not implement the __ipairs metamethod", lua_tostring(L, -1));
-}
-
-static int cdata_add(lua_State* L)
-{
- struct ctype lt, rt, ct;
- void *lp, *rp;
- int ct_usr;
- int ret;
-
- lua_settop(L, 2);
-
- lp = to_cdata(L, 1, <);
- rp = to_cdata(L, 2, &rt);
- assert(lua_gettop(L) == 4);
-
- ret = call_user_binop(L, "__add", 1, 3, <, 2, 4, &rt);
- if (ret >= 0) {
- return ret;
- }
- assert(lua_gettop(L) == 4);
-
- ct_usr = rank(<) > rank(&rt) ? 3 : 4;
- ct = rank(<) > rank(&rt) ? lt : rt;
-
- if (IS_COMPLEX(ct.type)) {
- complex_double left, right, res;
-
- left = check_complex(L, 1, lp, <);
- right = check_complex(L, 2, rp, &rt);
- assert(lua_gettop(L) == 4);
-
-#ifdef HAVE_COMPLEX
- res = left + right;
-#else
- res.real = left.real + right.real;
- res.imag = left.imag + right.imag;
-#endif
-
- push_complex(L, res, ct_usr, &ct);
- return 1;
-
- } else {
- int64_t left = check_intptr(L, 1, lp, <);
- int64_t right = check_intptr(L, 2, rp, &rt);
- assert(lua_gettop(L) == 4);
-
- /* note due to 2s complement it doesn't matter if we do the addition as int or uint,
- * but the result needs to be uint64_t if either of the sources are */
-
- if (lt.pointers && rt.pointers) {
- luaL_error(L, "can't add two pointers");
-
- } else if (lt.pointers) {
- int64_t res = left + (lt.pointers > 1 ? sizeof(void*) : lt.base_size) * right;
- lt.is_array = 0;
- push_number(L, res, 3, <);
-
- } else if (rt.pointers) {
- int64_t res = right + (rt.pointers > 1 ? sizeof(void*) : rt.base_size) * left;
- rt.is_array = 0;
- push_number(L, res, 4, &rt);
-
- } else {
- push_number(L, left + right, ct_usr, &ct);
- }
-
- return 1;
- }
-}
-
-static int cdata_sub(lua_State* L)
-{
- struct ctype lt, rt, ct;
- void *lp, *rp;
- int ct_usr;
- int ret;
-
- lua_settop(L, 2);
-
- lp = to_cdata(L, 1, <);
- rp = to_cdata(L, 2, &rt);
-
- ret = call_user_binop(L, "__sub", 1, 3, <, 2, 4, &rt);
- if (ret >= 0) {
- return ret;
- }
-
- ct_usr = rank(<) > rank(&rt) ? 3 : 4;
- ct = rank(<) > rank(&rt) ? lt : rt;
-
- if (IS_COMPLEX(ct.type)) {
- complex_double left, right, res;
-
- left = check_complex(L, 1, lp, <);
- right = check_complex(L, 2, rp, &rt);
-
-#ifdef HAVE_COMPLEX
- res = left - right;
-#else
- res.real = left.real - right.real;
- res.imag = left.imag - right.imag;
-#endif
-
- push_complex(L, res, ct_usr, &ct);
- return 1;
-
- } else {
- int64_t left = check_intptr(L, 1, lp, <);
- int64_t right = check_intptr(L, 2, rp, &rt);
-
- if (rt.pointers) {
- luaL_error(L, "NYI: can't subtract a pointer value");
-
- } else if (lt.pointers) {
- int64_t res = left - (lt.pointers > 1 ? sizeof(void*) : lt.base_size) * right;
- lt.is_array = 0;
- push_number(L, res, 3, <);
-
- } else {
- int64_t res = left - right;
- push_number(L, res, ct_usr, &ct);
- }
-
- return 1;
- }
-}
-
-/* TODO fix for unsigned */
-#define NUMBER_ONLY_BINOP(OPSTR, DO_NORMAL, DO_COMPLEX) \
- struct ctype lt, rt, ct; \
- void *lp, *rp; \
- int ct_usr; \
- int ret; \
- \
- lua_settop(L, 2); \
- \
- lp = to_cdata(L, 1, <); \
- rp = to_cdata(L, 2, &rt); \
- \
- ret = call_user_binop(L, OPSTR, 1, 3, <, 2, 4, &rt); \
- if (ret >= 0) { \
- return ret; \
- } \
- \
- ct_usr = rank(<) > rank(&rt) ? 3 : 4; \
- ct = rank(<) > rank(&rt) ? lt : rt; \
- \
- if (IS_COMPLEX(ct.type)) { \
- complex_double res; \
- complex_double left = check_complex(L, 1, lp, <); \
- complex_double right = check_complex(L, 2, rp, &rt); \
- \
- DO_COMPLEX(left, right, res); \
- push_complex(L, res, ct_usr, &ct); \
- \
- } else if (lt.pointers || rt.pointers) { \
- luaL_error(L, "can't operate on a pointer value"); \
- \
- } else { \
- int64_t res; \
- int64_t left = check_intptr(L, 1, lp, <); \
- int64_t right = check_intptr(L, 2, rp, &rt); \
- \
- DO_NORMAL(left, right, res); \
- push_number(L, res, ct_usr, &ct); \
- } \
- \
- return 1
-
-#define MUL(l,r,s) s = l * r
-#define DIV(l,r,s) s = l / r
-#define MOD(l,r,s) s = l % r
-#define POW(l,r,s) s = pow(l, r)
-
-#ifdef HAVE_COMPLEX
-#define MULC(l,r,s) s = l * r
-#define DIVC(l,r,s) s = l / r
-#define MODC(l,r,s) (void) l, (void) r, memset(&s, 0, sizeof(s)), luaL_error(L, "NYI: complex mod")
-#define POWC(l,r,s) s = cpow(l, r)
-#else
-#define MULC(l,r,s) s.real = l.real * r.real - l.imag * r.imag, s.imag = l.real * r.imag + l.imag * r.real
-#define DIVC(l,r,s) s.real = (l.real * r.real + l.imag * r.imag) / (r.real * r.real + r.imag * r.imag), \
- s.imag = (l.imag * r.real - l.real * r.imag) / (r.real * r.real + r.imag * r.imag)
-#define MODC(l,r,s) (void) l, (void) r, memset(&s, 0, sizeof(s)), luaL_error(L, "NYI: complex mod")
-#define POWC(l,r,s) (void) l, (void) r, memset(&s, 0, sizeof(s)), luaL_error(L, "NYI: complex pow")
-#endif
-
-static int cdata_mul(lua_State* L)
-{ NUMBER_ONLY_BINOP("__mul", MUL, MULC); }
-
-static int cdata_div(lua_State* L)
-{ NUMBER_ONLY_BINOP("__div", DIV, DIVC); }
-
-static int cdata_mod(lua_State* L)
-{ NUMBER_ONLY_BINOP("__mod", MOD, MODC); }
-
-static int cdata_pow(lua_State* L)
-{ NUMBER_ONLY_BINOP("__pow", POW, POWC); }
-
-#define COMPARE_BINOP(OPSTR, OP, OPC) \
- struct ctype lt, rt; \
- void *lp, *rp; \
- int ret, res; \
- \
- lua_settop(L, 2); \
- \
- lp = to_cdata(L, 1, <); \
- rp = to_cdata(L, 2, &rt); \
- \
- ret = call_user_binop(L, OPSTR, 1, 3, <, 2, 4, &rt); \
- if (ret >= 0) { \
- return ret; \
- } \
- \
- if (IS_COMPLEX(lt.type) || IS_COMPLEX(rt.type)) { \
- complex_double left = check_complex(L, 1, lp, <); \
- complex_double right = check_complex(L, 2, rp, &rt); \
- \
- res = OPC(left, right); \
- \
- lua_pushboolean(L, res); \
- \
- } else { \
- int64_t left = check_intptr(L, 1, lp, <); \
- int64_t right = check_intptr(L, 2, rp, &rt); \
- \
- if (lt.pointers && rt.pointers) { \
- if (is_void_ptr(<) || is_void_ptr(&rt) || is_same_type(L, 3, 4, <, &rt)) { \
- res = OP((uint64_t) left, (uint64_t) right); \
- } else { \
- goto err; \
- } \
- \
- } else if (lt.is_null && rt.type == FUNCTION_PTR_TYPE) { \
- res = OP((uint64_t) left, (uint64_t) right); \
- \
- } else if (rt.is_null && lt.type == FUNCTION_PTR_TYPE) { \
- res = OP((uint64_t) left, (uint64_t) right); \
- \
- } else if (lt.pointers && rt.type == INTPTR_TYPE && rt.is_unsigned) {\
- res = OP((uint64_t) left, (uint64_t) right); \
- \
- } else if (rt.pointers && lt.type == INTPTR_TYPE && lt.is_unsigned) {\
- res = OP((uint64_t) left, (uint64_t) right); \
- \
- } else if (rt.pointers || lt.pointers) { \
- goto err; \
- \
- } else if (lt.is_unsigned && rt.is_unsigned) { \
- res = OP((uint64_t) left, (uint64_t) right); \
- \
- } else if (lt.is_unsigned) { \
- res = OP((int64_t) (uint64_t) left, right); \
- \
- } else if (rt.is_unsigned) { \
- res = OP(left, (int64_t) (uint64_t) right); \
- \
- } else { \
- res = OP(left, right); \
- } \
- \
- lua_pushboolean(L, res); \
- } \
- return 1
-
-#define EQ(l, r) (l) == (r)
-#define LT(l, r) (l) < (r)
-#define LE(l, r) (l) <= (r)
-
-#ifdef HAVE_COMPLEX
-#define EQC(l, r) (l) == (r)
-#else
-#define EQC(l, r) (l).real == (r).real && (l).imag == (r).imag
-#endif
-
-#define LEC(l, r) EQC(l, r), luaL_error(L, "complex numbers are non-orderable")
-#define LTC(l, r) EQC(l, r), luaL_error(L, "complex numbers are non-orderable")
-
-static int cdata_eq(lua_State* L)
-{
- COMPARE_BINOP("__eq", EQ, EQC);
-err:
- lua_pushboolean(L, 0);
- return 1;
-}
-
-static int cdata_lt(lua_State* L)
-{
- COMPARE_BINOP("__lt", LT, LTC);
-err:
- lua_getuservalue(L, 1);
- lua_getuservalue(L, 2);
- push_type_name(L, -2, <);
- push_type_name(L, -2, <);
- return luaL_error(L, "trying to compare incompatible types %s and %s", lua_tostring(L, -2), lua_tostring(L, -1));
-}
-
-static int cdata_le(lua_State* L)
-{
- COMPARE_BINOP("__le", LE, LEC);
-err:
- lua_getuservalue(L, 1);
- lua_getuservalue(L, 2);
- push_type_name(L, -2, <);
- push_type_name(L, -2, <);
- return luaL_error(L, "trying to compare incompatible types %s and %s", lua_tostring(L, -2), lua_tostring(L, -1));
-}
-
-static const char* etype_tostring(int type)
-{
- switch (type) {
- case VOID_TYPE: return "void";
- case DOUBLE_TYPE: return "double";
- case FLOAT_TYPE: return "float";
- case COMPLEX_DOUBLE_TYPE: return "complex double";
- case COMPLEX_FLOAT_TYPE: return "complex float";
- case BOOL_TYPE: return "bool";
- case INT8_TYPE: return "int8";
- case INT16_TYPE: return "int16";
- case INT32_TYPE: return "int32";
- case INT64_TYPE: return "int64";
- case INTPTR_TYPE: return "intptr";
- case ENUM_TYPE: return "enum";
- case UNION_TYPE: return "union";
- case STRUCT_TYPE: return "struct";
- case FUNCTION_PTR_TYPE: return "function ptr";
- case FUNCTION_TYPE: return "function";
- default: return "invalid";
- }
-}
-
-static void print_type(lua_State* L, const struct ctype* ct)
-{
- lua_pushfstring(L, " sz %d %d %d align %d ptr %d %d %d type %s%s %d %d %d name %d call %d %d var %d %d %d bit %d %d %d %d jit %d",
- /* sz */
- ct->base_size,
- ct->array_size,
- ct->offset,
- /* align */
- ct->align_mask,
- /* ptr */
- ct->is_array,
- ct->pointers,
- ct->const_mask,
- /* type */
- ct->is_unsigned ? "u" : "",
- etype_tostring(ct->type),
- ct->is_reference,
- ct->is_defined,
- ct->is_null,
- /* name */
- ct->has_member_name,
- /* call */
- ct->calling_convention,
- ct->has_var_arg,
- /* var */
- ct->is_variable_array,
- ct->is_variable_struct,
- ct->variable_size_known,
- /* bit */
- ct->is_bitfield,
- ct->has_bitfield,
- ct->bit_offset,
- ct->bit_size,
- /* jit */
- ct->is_jitted);
-}
-
-static int ctype_tostring(lua_State* L)
-{
- struct ctype ct;
- assert(lua_type(L, 1) == LUA_TUSERDATA);
- lua_settop(L, 1);
- check_ctype(L, 1, &ct);
- assert(lua_gettop(L) == 2);
- push_type_name(L, -1, &ct);
- lua_pushfstring(L, "ctype<%s>", lua_tostring(L, -1));
-
- if (DEBUG_TOSTRING) {
- print_type(L, &ct);
- lua_concat(L, 2);
- }
-
- return 1;
-}
-
-static int cdata_tostring(lua_State* L)
-{
- struct ctype ct;
- char buf[64];
- void* p;
- int ret;
-
- lua_settop(L, 1);
- p = to_cdata(L, 1, &ct);
-
- ret = call_user_op(L, "__tostring", 1, 2, &ct);
- if (ret >= 0) {
- return ret;
- }
-
- if (ct.pointers > 0 || ct.is_reference || ct.type == STRUCT_TYPE || ct.type == UNION_TYPE) {
- push_type_name(L, -1, &ct);
- lua_pushfstring(L, "cdata<%s>: %p", lua_tostring(L, -1), p);
-
- if (DEBUG_TOSTRING) {
- print_type(L, &ct);
- lua_concat(L, 2);
- }
-
- return 1;
- }
-
- switch (ct.type) {
- case COMPLEX_DOUBLE_TYPE:
- {
- complex_double c = *(complex_double*) p;
- lua_pushfstring(L, "%f+%fi", creal(c), cimag(c));
- }
- return 1;
-
- case COMPLEX_FLOAT_TYPE:
- {
- complex_float c = *(complex_float*) p;
- lua_pushfstring(L, "%f+%fi", crealf(c), cimagf(c));
- }
- return 1;
-
- case FUNCTION_PTR_TYPE:
- p = *(void**) p;
- push_type_name(L, -1, &ct);
- lua_pushfstring(L, "cdata<%s>: %p", lua_tostring(L, -1), *(void**) p);
- return 1;
-
- case INTPTR_TYPE:
- lua_pushfstring(L, "%p", *(uintptr_t*) p);
- return 1;
-
- case INT64_TYPE:
- sprintf(buf, ct.is_unsigned ? "%"PRIu64 : "%"PRId64, *(uint64_t*) p);
- lua_pushstring(L, buf);
- return 1;
-
- default:
- sprintf(buf, ct.is_unsigned ? "%"PRId64 : "%"PRId64, (int64_t) check_intptr(L, 1, p, &ct));
- lua_pushstring(L, buf);
- return 1;
- }
-}
-
-static int ffi_errno(lua_State* L)
-{
- struct jit* jit = get_jit(L);
-
- if (!lua_isnoneornil(L, 1)) {
- lua_pushinteger(L, jit->last_errno);
- jit->last_errno = luaL_checknumber(L, 1);
- } else {
- lua_pushinteger(L, jit->last_errno);
- }
-
- return 1;
-}
-
-static int ffi_type(lua_State* L)
-{
- if (lua_isuserdata(L, 1) && lua_getmetatable(L, 1)) {
- if (equals_upval(L, -1, &cdata_mt_key) || equals_upval(L, -1, &ctype_mt_key)) {
- lua_pushstring(L, "cdata");
- return 1;
- }
- lua_pop(L, 1); /* mt */
- }
-
- /* call the old _G.type, we use an upvalue as _G.type is set
- * to this function */
- lua_pushvalue(L, lua_upvalueindex(1));
- lua_insert(L, 1);
- lua_call(L, lua_gettop(L)-1, LUA_MULTRET);
- return lua_gettop(L);
-}
-
-static int ffi_number(lua_State* L)
-{
- struct ctype ct;
- void* data = to_cdata(L, 1, &ct);
-
- if (ct.type != INVALID_TYPE) {
- lua_pushinteger(L, check_intptr(L, 1, data, &ct));
- return 1;
- } else {
- /* call the old _G.tonumber, we use an upvalue as _G.tonumber is set
- * to this function */
- lua_pushvalue(L, lua_upvalueindex(1));
- lua_insert(L, 1);
- lua_call(L, lua_gettop(L)-1, LUA_MULTRET);
- return lua_gettop(L);
- }
-}
-
-static int ffi_string(lua_State* L)
-{
- struct ctype ct;
- char* data;
- lua_settop(L, 2);
-
- data = (char*) check_cdata(L, 1, &ct);
-
- if (is_void_ptr(&ct)) {
- lua_pushlstring(L, data, (size_t) luaL_checknumber(L, 2));
- return 1;
-
- } else if (ct.type == INT8_TYPE && ct.pointers == 1) {
- size_t sz;
-
- if (lua_isuserdata(L, 2)) {
- ptrdiff_t val;
- if (!cdata_tointeger(L, 2, &val)) {
- type_error(L, 2, "int", 0, NULL);
- }
- sz = (size_t) val;
- } else if (!lua_isnil(L, 2)) {
- sz = (size_t) luaL_checknumber(L, 2);
-
- } else if (ct.is_array && !ct.is_variable_array) {
- char* nul = memchr(data, '\0', ct.array_size);
- sz = nul ? nul - data : ct.array_size;
-
- } else {
- sz = strlen(data);
- }
-
- lua_pushlstring(L, data, sz);
- return 1;
- }
-
- return luaL_error(L, "unable to convert cdata to string");
-}
-
-static int ffi_copy(lua_State* L)
-{
- struct ctype ft, tt;
- char *to, *from;
-
- setmintop(L, 3);
- to = (char*) check_pointer(L, 1, &tt);
- from = (char*) check_pointer(L, 2, &ft);
-
- if (!lua_isnoneornil(L, 3)) {
- memcpy(to, from, (size_t) luaL_checknumber(L, 3));
-
- } else if (ft.type == INT8_TYPE && ft.pointers == 1) {
- size_t sz = ft.is_array ? ft.array_size : strlen(from);
- memcpy(to, from, sz);
- to[sz] = '\0';
- }
-
- return 0;
-}
-
-static int ffi_fill(lua_State* L)
-{
- struct ctype ct;
- void* to;
- size_t sz;
- int val = 0;
-
- setmintop(L, 3);
- to = check_pointer(L, 1, &ct);
- sz = (size_t) luaL_checknumber(L, 2);
-
- if (!lua_isnoneornil(L, 3)) {
- val = (int) luaL_checkinteger(L, 3);
- }
-
- memset(to, val, sz);
- return 0;
-}
-
-static int ffi_abi(lua_State* L)
-{
- luaL_checkstring(L, 1);
- push_upval(L, &abi_key);
- lua_pushvalue(L, 1);
- lua_rawget(L, -2);
- lua_pushboolean(L, lua_toboolean(L, -1));
- return 1;
-}
-
-static int ffi_load(lua_State* L)
-{
- const char* libname = luaL_checkstring(L, 1);
- void** lib = (void**) lua_newuserdata(L, sizeof(void*));
-
- *lib = LoadLibraryA(libname);
-
-#ifdef LIB_FORMAT_1
- if (!*lib) {
- libname = lua_pushfstring(L, LIB_FORMAT_1, lua_tostring(L, 1));
- *lib = LoadLibraryA(libname);
- lua_pop(L, 1);
- }
-#endif
-
-#ifdef LIB_FORMAT_2
- if (!*lib) {
- libname = lua_pushfstring(L, LIB_FORMAT_2, lua_tostring(L, 1));
- *lib = LoadLibraryA(libname);
- lua_pop(L, 1);
- }
-#endif
-
- if (!*lib) {
- return luaL_error(L, "could not load library %s", lua_tostring(L, 1));
- }
-
- lua_newtable(L);
- lua_setuservalue(L, -2);
-
- push_upval(L, &cmodule_mt_key);
- lua_setmetatable(L, -2);
- return 1;
-}
-
-static void* find_symbol(lua_State* L, int modidx, const char* asmname)
-{
- size_t i;
- void** libs;
- size_t num;
- void* sym = NULL;
-
- libs = (void**) lua_touserdata(L, modidx);
- num = lua_rawlen(L, modidx) / sizeof(void*);
-
- for (i = 0; i < num && sym == NULL; i++) {
- if (libs[i]) {
- sym = GetProcAddressA(libs[i], asmname);
- }
- }
-
- return sym;
-}
-
-/* pushes the user table */
-static void* lookup_global(lua_State* L, int modidx, int nameidx, const char** pname, struct ctype* ct)
-{
- int top = lua_gettop(L);
- void* sym;
-
- modidx = lua_absindex(L, modidx);
- nameidx = lua_absindex(L, nameidx);
-
- *pname = luaL_checkstring(L, nameidx);
-
- /* get the ctype */
- push_upval(L, &functions_key);
- lua_pushvalue(L, nameidx);
- lua_rawget(L, -2);
- if (lua_isnil(L, -1)) {
- luaL_error(L, "missing declaration for function/global %s", *pname);
- return NULL;
- }
-
- /* leave just the ct_usr on the stack */
- *ct = *(const struct ctype*) lua_touserdata(L, -1);
- lua_getuservalue(L, -1);
- lua_replace(L, top + 1);
- lua_pop(L, 1);
-
- assert(lua_gettop(L) == top + 1);
-
- /* get the assembly name */
- push_upval(L, &asmname_key);
- lua_pushvalue(L, nameidx);
- lua_rawget(L, -2);
- if (lua_isstring(L, -1)) {
- *pname = lua_tostring(L, -1);
- }
- lua_pop(L, 2);
-
- sym = find_symbol(L, modidx, *pname);
-
- assert(lua_gettop(L) == top + 1);
- return sym;
-}
-
-static int cmodule_index(lua_State* L)
-{
- const char* asmname;
- struct ctype ct;
- void *sym;
-
- lua_settop(L, 2);
-
- /* see if we have already loaded the function */
- lua_getuservalue(L, 1);
- lua_pushvalue(L, 2);
- lua_rawget(L, -2);
- if (!lua_isnil(L, -1)) {
- return 1;
- }
- lua_pop(L, 2);
-
- /* check the constants table */
- push_upval(L, &constants_key);
- lua_pushvalue(L, 2);
- lua_rawget(L, -2);
- if (!lua_isnil(L, -1)) {
- return 1;
- }
- lua_pop(L, 2);
-
- /* lookup_global pushes the ct_usr */
- sym = lookup_global(L, 1, 2, &asmname, &ct);
-
-#if defined _WIN32 && !defined _WIN64 && (defined __i386__ || defined _M_IX86)
- if (!sym && ct.type == FUNCTION_TYPE) {
- ct.calling_convention = STD_CALL;
- lua_pushfstring(L, "_%s@%d", asmname, x86_return_size(L, -1, &ct));
- sym = find_symbol(L, 1, lua_tostring(L, -1));
- lua_pop(L, 1);
- }
-
- if (!sym && ct.type == FUNCTION_TYPE) {
- ct.calling_convention = FAST_CALL;
- lua_pushfstring(L, "@%s@%d", asmname, x86_return_size(L, -1, &ct));
- sym = find_symbol(L, 1, lua_tostring(L, -1));
- lua_pop(L, 1);
- }
-#endif
-
- if (!sym) {
- return luaL_error(L, "failed to find function/global %s", asmname);
- }
-
- assert(lua_gettop(L) == 3); /* module, name, ct_usr */
-
- if (ct.type == FUNCTION_TYPE) {
- compile_function(L, (cfunction) sym, -1, &ct);
- assert(lua_gettop(L) == 4); /* module, name, ct_usr, function */
-
- /* set module usr value[luaname] = function to cache for next time */
- lua_getuservalue(L, 1);
- lua_pushvalue(L, 2);
- lua_pushvalue(L, -3);
- lua_rawset(L, -3);
- lua_pop(L, 1); /* module uv */
- return 1;
- }
-
- /* extern const char* foo; and extern const char foo[]; */
- if (ct.pointers == 1 && ct.type == INT8_TYPE) {
- char* str = (char*) sym;
- if (!ct.is_array) {
- str = *(char**) sym;
- }
- lua_pushstring(L, str);
- return 1;
- }
-
- /* extern struct foo foo[], extern void* foo[]; and extern struct foo foo; */
- if (ct.is_array || (!ct.pointers && (ct.type == UNION_TYPE || ct.type == STRUCT_TYPE))) {
- void* p;
- ct.is_reference = 1;
- p = push_cdata(L, -1, &ct);
- *(void**) p = sym;
- return 1;
- }
-
- /* extern void* foo; and extern void (*foo)(); */
- if (ct.pointers || ct.type == FUNCTION_PTR_TYPE) {
- void* p = push_cdata(L, -1, &ct);
- *(void**) p = *(void**) sym;
- return 1;
- }
-
- switch (ct.type) {
- case COMPLEX_DOUBLE_TYPE:
- case COMPLEX_FLOAT_TYPE:
- case INTPTR_TYPE:
- case INT64_TYPE:
- {
- /* TODO: complex float/double need to be references if .re and
- * .imag are setable */
- void* p = push_cdata(L, -1, &ct);
- memcpy(p, sym, ct.base_size);
- return 1;
- }
-
- case DOUBLE_TYPE:
- lua_pushnumber(L, *(double*) sym);
- return 1;
-
- case FLOAT_TYPE:
- lua_pushnumber(L, *(float*) sym);
- return 1;
-
- case BOOL_TYPE:
- lua_pushboolean(L, *(bool*) sym);
- return 1;
-
- case INT8_TYPE:
- lua_pushinteger(L, ct.is_unsigned ? (lua_Integer) *(uint8_t*) sym : (lua_Integer) *(int8_t*) sym);
- return 1;
-
- case INT16_TYPE:
- lua_pushinteger(L, ct.is_unsigned ? (lua_Integer) *(uint16_t*) sym : (lua_Integer) *(int16_t*) sym);
- return 1;
-
- case INT32_TYPE:
- case ENUM_TYPE:
- lua_pushinteger(L, ct.is_unsigned ? (lua_Integer) *(uint32_t*) sym : (lua_Integer) *(int32_t*) sym);
- return 1;
- }
-
- return luaL_error(L, "NYI - global value type");
-}
-
-static int cmodule_newindex(lua_State* L)
-{
- const char* name;
- void* sym;
- struct ctype ct;
-
- lua_settop(L, 3);
-
- /* pushes the ct_usr */
- sym = lookup_global(L, 1, 2, &name, &ct);
- assert(lua_gettop(L) == 4); /* module, name, value, ct_usr */
-
- if (sym == NULL) {
- return luaL_error(L, "failed to find global %s", name);
- }
-
- if (ct.type == FUNCTION_TYPE || ct.is_array || (ct.const_mask & 1)) {
- return luaL_error(L, "can not set global %s", name);
- }
-
- set_value(L, 3, sym, -1, &ct, 1);
- return 0;
-}
-
-static int jit_gc(lua_State* L)
-{
- size_t i;
- struct jit* jit = get_jit(L);
- dasm_free(jit);
- for (i = 0; i < jit->pagenum; i++) {
- FreePage(jit->pages[i], jit->pages[i]->size);
- }
- free(jit->globals);
- return 0;
-}
-
-static int ffi_debug(lua_State* L)
-{
- lua_newtable(L);
- push_upval(L, &ctype_mt_key);
- lua_setfield(L, -2, "ctype_mt");
- push_upval(L, &cdata_mt_key);
- lua_setfield(L, -2, "cdata_mt");
- push_upval(L, &cmodule_mt_key);
- lua_setfield(L, -2, "cmodule_mt");
- push_upval(L, &constants_key);
- lua_setfield(L, -2, "constants");
- push_upval(L, &types_key);
- lua_setfield(L, -2, "types");
- push_upval(L, &jit_key);
- lua_setfield(L, -2, "jit");
- push_upval(L, &gc_key);
- lua_setfield(L, -2, "gc");
- push_upval(L, &callbacks_key);
- lua_setfield(L, -2, "callbacks");
- push_upval(L, &functions_key);
- lua_setfield(L, -2, "functions");
- push_upval(L, &abi_key);
- lua_setfield(L, -2, "abi");
- push_upval(L, &next_unnamed_key);
- lua_setfield(L, -2, "next_unnamed");
- return 1;
-}
-
-static int do64(lua_State* L, int is_unsigned)
-{
- lua_Number low, high;
- struct ctype ct;
- int64_t val;
-
- lua_settop(L, 2);
-
- if (!lua_isnil(L, 2)) {
- high = luaL_checknumber(L, 1);
- low = luaL_checknumber(L, 2);
- } else {
- high = 0;
- low = luaL_checknumber(L, 1);
- }
-
- val = ((int64_t) (uint32_t) high << 32) | (int64_t) (uint32_t) low;
-
- if (!is_unsigned && (high < 0 || low < 0)) {
- val = -val;
- }
-
- memset(&ct, 0, sizeof(ct));
- ct.type = INT64_TYPE;
- ct.is_unsigned = is_unsigned;
- ct.is_defined = 1;
- ct.base_size = sizeof(int64_t);
- push_number(L, (int64_t) val, 0, &ct);
-
- return 1;
-}
-
-static int ffi_i64(lua_State* L)
-{ return do64(L, 0); }
-
-static int ffi_u64(lua_State* L)
-{ return do64(L, 1); }
-
-static const luaL_Reg cdata_mt[] = {
- {"__gc", &cdata_gc},
- {"__call", &cdata_call},
- {"free", &cdata_free},
- {"set", &cdata_set},
- {"__index", &cdata_index},
- {"__newindex", &cdata_newindex},
- {"__add", &cdata_add},
- {"__sub", &cdata_sub},
- {"__mul", &cdata_mul},
- {"__div", &cdata_div},
- {"__mod", &cdata_mod},
- {"__pow", &cdata_pow},
- {"__unm", &cdata_unm},
- {"__eq", &cdata_eq},
- {"__lt", &cdata_lt},
- {"__le", &cdata_le},
- {"__tostring", &cdata_tostring},
- {"__concat", &cdata_concat},
- {"__len", &cdata_len},
- {"__pairs", &cdata_pairs},
- {"__ipairs", &cdata_ipairs},
- {NULL, NULL}
-};
-
-static const luaL_Reg callback_mt[] = {
- {"__gc", &callback_free},
- {NULL, NULL}
-};
-
-static const luaL_Reg ctype_mt[] = {
- {"__call", &ctype_call},
- {"__new", &ctype_new},
- {"__tostring", &ctype_tostring},
- {NULL, NULL}
-};
-
-static const luaL_Reg cmodule_mt[] = {
- {"__index", &cmodule_index},
- {"__newindex", &cmodule_newindex},
- {NULL, NULL}
-};
-
-static const luaL_Reg jit_mt[] = {
- {"__gc", &jit_gc},
- {NULL, NULL}
-};
-
-static const luaL_Reg ffi_reg[] = {
- {"cdef", &ffi_cdef},
- {"load", &ffi_load},
- {"new", &ffi_new},
- {"typeof", &ffi_typeof},
- {"cast", &ffi_cast},
- {"metatype", &ffi_metatype},
- {"gc", &ffi_gc},
- {"sizeof", &ffi_sizeof},
- {"alignof", &ffi_alignof},
- {"offsetof", &ffi_offsetof},
- {"istype", &ffi_istype},
- {"errno", &ffi_errno},
- {"string", &ffi_string},
- {"copy", &ffi_copy},
- {"fill", &ffi_fill},
- {"abi", &ffi_abi},
- {"debug", &ffi_debug},
- {"i64", &ffi_i64},
- {"u64", &ffi_u64},
- {NULL, NULL}
-};
-
-/* leaves the usr table on the stack */
-static void push_builtin(lua_State* L, struct ctype* ct, const char* name, int type, int size, int align, int is_unsigned)
-{
- memset(ct, 0, sizeof(*ct));
- ct->type = type;
- ct->base_size = size;
- ct->align_mask = align;
- ct->is_defined = 1;
- ct->is_unsigned = is_unsigned;
-
- if (IS_COMPLEX(type)) {
- lua_newtable(L);
- } else {
- lua_pushnil(L);
- }
-
- push_upval(L, &types_key);
- push_ctype(L, -2, ct);
- lua_setfield(L, -2, name);
- lua_pop(L, 2); /* types, usr table */
-}
-
-static void push_builtin_undef(lua_State* L, struct ctype* ct, const char* name, int type)
-{
- memset(ct, 0, sizeof(*ct));
- ct->type = type;
-
- push_upval(L, &types_key);
- push_ctype(L, 0, ct);
- lua_setfield(L, -2, name);
- lua_pop(L, 1); /* types */
-}
-
-static void add_typedef(lua_State* L, const char* from, const char* to)
-{
- struct ctype ct;
- struct parser P;
- P.line = 1;
- P.align_mask = DEFAULT_ALIGN_MASK;
- P.next = P.prev = from;
-
- push_upval(L, &types_key);
- parse_type(L, &P, &ct);
- parse_argument(L, &P, -1, &ct, NULL, NULL);
- push_ctype(L, -1, &ct);
-
- /* stack is at +4: types, type usr, arg usr, ctype */
-
- lua_setfield(L, -4, to);
- lua_pop(L, 3); /* types, type usr, arg usr */
-}
-
-static int setup_upvals(lua_State* L)
-{
- struct jit* jit = get_jit(L);
-
- /* jit setup */
- {
- dasm_init(jit, 64);
-#ifdef _WIN32
- {
- SYSTEM_INFO si;
- GetSystemInfo(&si);
- jit->align_page_size = si.dwAllocationGranularity - 1;
- }
-#else
- jit->align_page_size = sysconf(_SC_PAGE_SIZE) - 1;
-#endif
- jit->globals = (void**) malloc(64 * sizeof(void*));
- dasm_setupglobal(jit, jit->globals, 64);
- compile_globals(jit, L);
- }
-
- /* ffi.C */
- {
-#ifdef _WIN32
- size_t sz = sizeof(HMODULE) * 6;
- HMODULE* libs = lua_newuserdata(L, sz);
- memset(libs, 0, sz);
-
- /* exe */
- GetModuleHandle(NULL);
- /* lua dll */
-#ifdef LUA_DLL_NAME
-#define STR2(tok) #tok
-#define STR(tok) STR2(tok)
- libs[1] = LoadLibraryA(STR(LUA_DLL_NAME));
-#undef STR
-#undef STR2
-#endif
-
- /* crt */
-#ifdef UNDER_CE
- libs[2] = LoadLibraryA("coredll.dll");
-#else
- GetModuleHandleExA(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS, (char*) &_fmode, &libs[2]);
- libs[3] = LoadLibraryA("kernel32.dll");
- libs[4] = LoadLibraryA("user32.dll");
- libs[5] = LoadLibraryA("gdi32.dll");
-#endif
-
- jit->lua_dll = libs[1];
- jit->kernel32_dll = libs[3];
-
-#else /* !_WIN32 */
- size_t sz = sizeof(void*) * 5;
- void** libs = lua_newuserdata(L, sz);
- memset(libs, 0, sz);
-
- libs[0] = LoadLibraryA(NULL); /* exe */
- libs[1] = LoadLibraryA("libc.so");
-#ifdef __GNUC__
- libs[2] = LoadLibraryA("libgcc.so");
-#endif
- libs[3] = LoadLibraryA("libm.so");
- libs[4] = LoadLibraryA("libdl.so");
-#endif
-
- lua_newtable(L);
- lua_setuservalue(L, -2);
-
- push_upval(L, &cmodule_mt_key);
- lua_setmetatable(L, -2);
-
- lua_setfield(L, 1, "C");
- }
-
- /* setup builtin types */
- {
- complex_double* pc;
- struct {char ch; uint16_t v;} a16;
- struct {char ch; uint32_t v;} a32;
- struct {char ch; uint64_t v;} a64;
- struct {char ch; float v;} af;
- struct {char ch; double v;} ad;
-#ifdef HAVE_LONG_DOUBLE
- struct {char ch; long double v;} ald;
-#endif
- struct {char ch; uintptr_t v;} aptr;
- struct ctype ct;
- struct {char ch; complex_float v;} cf;
- struct {char ch; complex_double v;} cd;
-#if defined HAVE_LONG_DOUBLE && defined HAVE_COMPLEX
- struct {char ch; complex long double v;} cld;
-#endif
-
- push_builtin(L, &ct, "void", VOID_TYPE, 0, 0, 0);
- push_builtin(L, &ct, "bool", BOOL_TYPE, sizeof(_Bool), sizeof(_Bool) -1, 1);
- push_builtin(L, &ct, "uint8_t", INT8_TYPE, sizeof(uint8_t), 0, 1);
- push_builtin(L, &ct, "int8_t", INT8_TYPE, sizeof(int8_t), 0, 0);
- push_builtin(L, &ct, "uint16_t", INT16_TYPE, sizeof(uint16_t), ALIGNOF(a16), 1);
- push_builtin(L, &ct, "int16_t", INT16_TYPE, sizeof(int16_t), ALIGNOF(a16), 0);
- push_builtin(L, &ct, "uint32_t", INT32_TYPE, sizeof(uint32_t), ALIGNOF(a32), 1);
- push_builtin(L, &ct, "int32_t", INT32_TYPE, sizeof(int32_t), ALIGNOF(a32), 0);
- push_builtin(L, &ct, "uint64_t", INT64_TYPE, sizeof(uint64_t), ALIGNOF(a64), 1);
- push_builtin(L, &ct, "int64_t", INT64_TYPE, sizeof(int64_t), ALIGNOF(a64), 0);
- push_builtin(L, &ct, "float", FLOAT_TYPE, sizeof(float), ALIGNOF(af), 0);
- push_builtin(L, &ct, "double", DOUBLE_TYPE, sizeof(double), ALIGNOF(ad), 0);
-#ifdef HAVE_LONG_DOUBLE
- push_builtin(L, &ct, "long double", LONG_DOUBLE_TYPE, sizeof(long double), ALIGNOF(ald), 0);
-#else
- push_builtin_undef(L, &ct, "long double", LONG_DOUBLE_TYPE);
-#endif
- push_builtin(L, &ct, "uintptr_t", INTPTR_TYPE, sizeof(uintptr_t), ALIGNOF(aptr), 1);
- push_builtin(L, &ct, "intptr_t", INTPTR_TYPE, sizeof(uintptr_t), ALIGNOF(aptr), 0);
- push_builtin(L, &ct, "complex float", COMPLEX_FLOAT_TYPE, sizeof(complex_float), ALIGNOF(cf), 0);
- push_builtin(L, &ct, "complex double", COMPLEX_DOUBLE_TYPE, sizeof(complex_double), ALIGNOF(cd), 0);
-#if defined HAVE_LONG_DOUBLE && defined HAVE_COMPLEX
- push_builtin(L, &ct, "complex long double", COMPLEX_LONG_DOUBLE_TYPE, sizeof(complex long double), ALIGNOF(cld), 0);
-#else
- push_builtin_undef(L, &ct, "complex long double", COMPLEX_LONG_DOUBLE_TYPE);
-#endif
-
- /* add NULL and i constants */
- push_upval(L, &constants_key);
-
- memset(&ct, 0, sizeof(ct));
- ct.type = VOID_TYPE;
- ct.is_defined = 1;
- ct.pointers = 1;
- ct.is_null = 1;
-
- /* add ffi.C.NULL */
- push_cdata(L, 0, &ct);
- lua_setfield(L, -2, "NULL");
-
- /* add ffi.NULL */
- push_cdata(L, 0, &ct);
- lua_setfield(L, 1, "NULL");
-
- memset(&ct, 0, sizeof(ct));
- ct.type = COMPLEX_DOUBLE_TYPE;
- ct.is_defined = 1;
- ct.base_size = sizeof(complex_double);
- pc = (complex_double*) push_cdata(L, 0, &ct);
-#ifdef HAVE_COMPLEX
- *pc = 1i;
-#else
- pc->real = 0;
- pc->imag = 1;
-#endif
- lua_setfield(L, -2, "i");
-
- lua_pop(L, 1); /* constants */
- }
-
- assert(lua_gettop(L) == 1);
-
- /* setup builtin typedefs */
- {
- add_typedef(L, "bool", "_Bool");
-
- if (sizeof(uint32_t) == sizeof(size_t)) {
- add_typedef(L, "uint32_t", "size_t");
- add_typedef(L, "int32_t", "ssize_t");
- } else if (sizeof(uint64_t) == sizeof(size_t)) {
- add_typedef(L, "uint64_t", "size_t");
- add_typedef(L, "int64_t", "ssize_t");
- }
-
- if (sizeof(int32_t) == sizeof(intptr_t)) {
- add_typedef(L, "int32_t", "intptr_t");
- add_typedef(L, "int32_t", "ptrdiff_t");
- } else if (sizeof(int64_t) == sizeof(intptr_t)) {
- add_typedef(L, "int64_t", "intptr_t");
- add_typedef(L, "int64_t", "ptrdiff_t");
- }
-
- if (sizeof(uint8_t) == sizeof(wchar_t)) {
- add_typedef(L, "uint8_t", "wchar_t");
- } else if (sizeof(uint16_t) == sizeof(wchar_t)) {
- add_typedef(L, "uint16_t", "wchar_t");
- } else if (sizeof(uint32_t) == sizeof(wchar_t)) {
- add_typedef(L, "uint32_t", "wchar_t");
- }
-
- if (sizeof(va_list) == sizeof(char*)) {
- add_typedef(L, "char*", "va_list");
- } else {
- struct {char ch; va_list v;} av;
- lua_pushfstring(L, "struct {char data[%d] __attribute__((align(%d)));}", (int) sizeof(va_list), (int) ALIGNOF(av) + 1);
- add_typedef(L, lua_tostring(L, -1), "va_list");
- lua_pop(L, 1);
- }
-
- add_typedef(L, "va_list", "__builtin_va_list");
- add_typedef(L, "va_list", "__gnuc_va_list");
- }
-
- assert(lua_gettop(L) == 1);
-
- /* setup ABI params table */
- push_upval(L, &abi_key);
-
-#if defined ARCH_X86 || defined ARCH_ARM
- lua_pushboolean(L, 1);
- lua_setfield(L, -2, "32bit");
-#elif defined ARCH_X64
- lua_pushboolean(L, 1);
- lua_setfield(L, -2, "64bit");
-#else
-#error
-#endif
-
-#if defined ARCH_X86 || defined ARCH_X64 || defined ARCH_ARM
- lua_pushboolean(L, 1);
- lua_setfield(L, -2, "le");
-#else
-#error
-#endif
-
-#if defined ARCH_X86 || defined ARCH_X64
- lua_pushboolean(L, 1);
- lua_setfield(L, -2, "fpu");
-#elif defined ARCH_ARM
- lua_pushboolean(L, 1);
- lua_setfield(L, -2, "softfp");
-#else
-#error
-#endif
- lua_pop(L, 1); /* abi tbl */
-
-
- /* GC table - shouldn't pin cdata values */
- push_upval(L, &gc_key);
- lua_newtable(L);
- lua_pushliteral(L, "k");
- lua_setfield(L, -2, "__mode");
- lua_setmetatable(L, -2);
- lua_pop(L, 1); /* gc table */
-
-
- /* ffi.os */
-#if defined OS_CE
- lua_pushliteral(L, "WindowsCE");
-#elif defined OS_WIN
- lua_pushliteral(L, "Windows");
-#elif defined OS_OSX
- lua_pushliteral(L, "OSX");
-#elif defined OS_LINUX
- lua_pushliteral(L, "Linux");
-#elif defined OS_BSD
- lua_pushliteral(L, "BSD");
-#elif defined OS_POSIX
- lua_pushliteral(L, "POSIX");
-#else
- lua_pushliteral(L, "Other");
-#endif
- lua_setfield(L, 1, "os");
-
-
- /* ffi.arch */
-#if defined ARCH_X86
- lua_pushliteral(L, "x86");
-#elif defined ARCH_X64
- lua_pushliteral(L, "x64");
-#elif defined ARCH_ARM
- lua_pushliteral(L, "arm");
-#else
-# error
-#endif
- lua_setfield(L, 1, "arch");
-
- assert(lua_gettop(L) == 1);
-
- return 0;
-}
-
-static void setup_mt(lua_State* L, const luaL_Reg* mt, int upvals)
-{
- lua_pushboolean(L, 1);
- lua_setfield(L, -upvals-2, "__metatable");
- luaL_setfuncs(L, mt, upvals);
-}
-
-int luaopen_ffi(lua_State* L)
-{
- lua_settop(L, 0);
-
- lua_newtable(L);
- set_upval(L, &niluv_key);
-
- lua_newtable(L);
- setup_mt(L, ctype_mt, 0);
- set_upval(L, &ctype_mt_key);
-
- lua_newtable(L);
- set_upval(L, &callbacks_key);
-
- lua_newtable(L);
- set_upval(L, &gc_key);
-
- lua_newtable(L);
- push_upval(L, &callbacks_key);
- push_upval(L, &gc_key);
- setup_mt(L, cdata_mt, 2);
- set_upval(L, &cdata_mt_key);
-
- lua_newtable(L);
- setup_mt(L, callback_mt, 0);
- set_upval(L, &callback_mt_key);
-
- lua_newtable(L);
- setup_mt(L, cmodule_mt, 0);
- set_upval(L, &cmodule_mt_key);
-
- memset(lua_newuserdata(L, sizeof(struct jit)), 0, sizeof(struct jit));
- lua_newtable(L);
- setup_mt(L, jit_mt, 0);
- lua_setmetatable(L, -2);
- set_upval(L, &jit_key);
-
- lua_newtable(L);
- set_upval(L, &constants_key);
-
- lua_newtable(L);
- set_upval(L, &types_key);
-
- lua_newtable(L);
- set_upval(L, &functions_key);
-
- lua_newtable(L);
- set_upval(L, &asmname_key);
-
- lua_newtable(L);
- set_upval(L, &abi_key);
-
- lua_pushinteger(L, 1);
- set_upval(L, &next_unnamed_key);
-
- assert(lua_gettop(L) == 0);
-
- /* ffi table */
- lua_newtable(L);
- luaL_setfuncs(L, ffi_reg, 0);
-
- /* setup_upvals(ffi tbl) */
- lua_pushcfunction(L, &setup_upvals);
- lua_pushvalue(L, 1);
- lua_call(L, 1, 0);
-
- assert(lua_gettop(L) == 1);
-
- lua_getglobal(L, "tonumber");
- lua_pushcclosure(L, &ffi_number, 1);
- lua_pushvalue(L, -1);
- lua_setglobal(L, "tonumber");
- lua_setfield(L, -2, "number"); /* ffi.number */
-
- lua_getglobal(L, "type");
- lua_pushcclosure(L, &ffi_type, 1);
- lua_pushvalue(L, -1);
- lua_setglobal(L, "type");
- lua_setfield(L, -2, "type"); /* ffi.type */
- return 1;
-}
|