forked from rebolsource/r3
/
t-struct.c
1066 lines (956 loc) · 26.2 KB
/
t-struct.c
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/***********************************************************************
**
** REBOL [R3] Language Interpreter and Run-time Environment
**
** Copyright 2014 Atronix Engineering, Inc.
** REBOL is a trademark of REBOL Technologies
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
**
************************************************************************
**
** Module: t-strut.c
** Summary: C struct object datatype
** Section: datatypes
** Author: Shixin Zeng
** Notes:
**
***********************************************************************/
#include "sys-core.h"
#define STATIC_ASSERT(e) do {(void)sizeof(char[1 - 2*!(e)]);} while(0)
#define IS_INTEGER_TYPE(t) ((t) < STRUCT_TYPE_INTEGER)
#define IS_DECIMAL_TYPE(t) ((t) > STRUCT_TYPE_INTEGER && (t) < STRUCT_TYPE_DECIMAL)
#define IS_NUMERIC_TYPE(t) (IS_INTEGER_TYPE(t) || IS_DECIMAL_TYPE(t))
REBFLG MT_Struct(REBVAL *out, REBVAL *data, REBCNT type);
static const REBINT type_to_sym [STRUCT_TYPE_MAX] = {
SYM_UINT8,
SYM_INT8,
SYM_UINT16,
SYM_INT16,
SYM_UINT32,
SYM_INT32,
SYM_UINT64,
SYM_INT64,
-1, //SYM_INTEGER,
SYM_FLOAT,
SYM_DOUBLE,
-1, //SYM_DECIMAL,
SYM_POINTER,
-1, //SYM_STRUCT
SYM_REBVAL
//STRUCT_TYPE_MAX
};
static get_scalar(REBSTU *stu,
struct Struct_Field *field,
REBCNT n, /* element index, starting from 0 */
REBVAL *val)
{
REBYTE *data = SERIES_SKIP(STRUCT_DATA_BIN(stu),
STRUCT_OFFSET(stu) + field->offset + n * field->size);
switch (field->type) {
case STRUCT_TYPE_UINT8:
SET_INTEGER(val, *(u8*)data);
break;
case STRUCT_TYPE_INT8:
SET_INTEGER(val, *(i8*)data);
break;
case STRUCT_TYPE_UINT16:
SET_INTEGER(val, *(u16*)data);
break;
case STRUCT_TYPE_INT16:
SET_INTEGER(val, *(i8*)data);
break;
case STRUCT_TYPE_UINT32:
SET_INTEGER(val, *(u32*)data);
break;
case STRUCT_TYPE_INT32:
SET_INTEGER(val, *(i32*)data);
break;
case STRUCT_TYPE_UINT64:
SET_INTEGER(val, *(u64*)data);
break;
case STRUCT_TYPE_INT64:
SET_INTEGER(val, *(i64*)data);
break;
case STRUCT_TYPE_FLOAT:
SET_DECIMAL(val, *(float*)data);
break;
case STRUCT_TYPE_DOUBLE:
SET_DECIMAL(val, *(double*)data);
break;
case STRUCT_TYPE_POINTER:
SET_INTEGER(val, (u64)*(void**)data);
break;
case STRUCT_TYPE_STRUCT:
{
SET_TYPE(val, REB_STRUCT);
VAL_STRUCT_FIELDS(val) = field->fields;
VAL_STRUCT_SPEC(val) = field->spec;
VAL_STRUCT_DATA(val) = Make_Series(1, sizeof(struct Struct_Data), FALSE);
VAL_STRUCT_DATA_BIN(val) = STRUCT_DATA_BIN(stu);
VAL_STRUCT_OFFSET(val) = data - SERIES_DATA(VAL_STRUCT_DATA_BIN(val));
VAL_STRUCT_LEN(val) = field->size;
}
break;
case STRUCT_TYPE_REBVAL:
memcpy(val, data, sizeof(REBVAL));
break;
default:
/* should never be here */
return FALSE;
}
return TRUE;
}
/***********************************************************************
**
*/ static REBFLG Get_Struct_Var(REBSTU *stu, REBVAL *word, REBVAL *val)
/*
***********************************************************************/
{
struct Struct_Field *field = NULL;
REBCNT i = 0;
field = (struct Struct_Field *)SERIES_DATA(stu->fields);
for (i = 0; i < SERIES_TAIL(stu->fields); i ++, field ++) {
if (VAL_WORD_CANON(word) == VAL_SYM_CANON(BLK_SKIP(PG_Word_Table.series, field->sym))) {
if (field->array) {
REBSER *ser = Make_Block(field->dimension);
REBCNT n = 0;
SET_TYPE(val, REB_BLOCK);
for (n = 0; n < field->dimension; n ++) {
REBVAL elem;
get_scalar(stu, field, n, &elem);
Append_Val(ser, &elem);
}
VAL_SERIES(val) = ser;
VAL_INDEX(val) = 0;
} else {
get_scalar(stu, field, 0, val);
}
return TRUE;
}
}
return FALSE;
}
/***********************************************************************
**
*/ static void Set_Struct_Vars(REBSTU *strut, REBVAL *blk)
/*
***********************************************************************/
{
}
/***********************************************************************
**
*/ REBSER *Struct_To_Block(REBSTU *stu)
/*
** Used by MOLD to create a block.
**
***********************************************************************/
{
REBSER *ser = Make_Block(10);
struct Struct_Field *field = (struct Struct_Field*) SERIES_DATA(stu->fields);
REBCNT i;
for(i = 0; i < SERIES_TAIL(stu->fields); i ++, field ++) {
REBVAL *val = NULL;
REBVAL *type_blk = NULL;
/* required field name */
val = Append_Value(ser);
Init_Word(val, field->sym);
SET_TYPE(val, REB_SET_WORD);
/* required type */
type_blk = Append_Value(ser);
VAL_SERIES(type_blk) = Make_Block(1);
SET_TYPE(type_blk, REB_BLOCK);
val = Append_Value(VAL_SERIES(type_blk));
if (field->type == STRUCT_TYPE_STRUCT) {
REBVAL *nested = NULL;
DS_PUSH_NONE;
nested = DS_TOP;
Init_Word(val, SYM_STRUCT_TYPE);
get_scalar(stu, field, 0, nested);
val = Append_Value(VAL_SERIES(type_blk));
SET_TYPE(val, REB_BLOCK);
VAL_SERIES(val) = Struct_To_Block(&VAL_STRUCT(nested));
DS_POP;
} else {
REBINT sym = type_to_sym[field->type];
Init_Word(val, sym);
}
/* optional dimension */
if (field->dimension > 1) {
REBSER *dim = Make_Block(1);
REBVAL *dv = NULL;
val = Append_Value(VAL_SERIES(type_blk));
SET_TYPE(val, REB_BLOCK);
VAL_SERIES(val) = dim;
dv = Append_Value(dim);
SET_INTEGER(dv, field->dimension);
}
/* optional initialization */
if (field->dimension > 1) {
REBSER *dim = Make_Block(1);
REBCNT n = 0;
val = Append_Value(ser);
SET_TYPE(val, REB_BLOCK);
VAL_SERIES(val) = dim;
for (n = 0; n < field->dimension; n ++) {
REBVAL *dv = Append_Value(dim);
get_scalar(stu, field, n, dv);
}
} else {
val = Append_Value(ser);
get_scalar(stu, field, 0, val);
}
}
return ser;
}
static REBOOL same_fields(REBSER *tgt, REBSER *src)
{
struct Struct_Field *tgt_fields = (struct Struct_Field *) SERIES_DATA(tgt);
struct Struct_Field *src_fields = (struct Struct_Field *) SERIES_DATA(src);
REBCNT n;
if (SERIES_TAIL(tgt) != SERIES_TAIL(src)) {
return FALSE;
}
for(n = 0; n < SERIES_TAIL(src); n ++) {
if (tgt_fields[n].type != src_fields[n].type) {
return FALSE;
}
if (VAL_SYM_CANON(BLK_SKIP(PG_Word_Table.series, tgt_fields[n].sym))
!= VAL_SYM_CANON(BLK_SKIP(PG_Word_Table.series, src_fields[n].sym))
|| tgt_fields[n].offset != src_fields[n].offset
|| tgt_fields[n].dimension != src_fields[n].dimension
|| tgt_fields[n].size != src_fields[n].size) {
return FALSE;
}
if (tgt_fields[n].type == STRUCT_TYPE_STRUCT
&& ! same_fields(tgt_fields[n].fields, src_fields[n].fields)) {
return FALSE;
}
}
return TRUE;
}
static REBOOL assign_scalar(REBSTU *stu,
struct Struct_Field *field,
REBCNT n, /* element index, starting from 0 */
REBVAL *val)
{
u64 i = 0;
double d = 0;
void *data = SERIES_SKIP(STRUCT_DATA_BIN(stu),
STRUCT_OFFSET(stu) + field->offset + n * field->size);
if (field->type == STRUCT_TYPE_REBVAL) {
memcpy(data, val, sizeof(REBVAL));
return TRUE;
}
switch (VAL_TYPE(val)) {
case REB_DECIMAL:
if (!IS_NUMERIC_TYPE(field->type)) {
Trap_Type(val);
}
d = VAL_DECIMAL(val);
i = (u64) d;
break;
case REB_INTEGER:
if (!IS_NUMERIC_TYPE(field->type)
&& field->type != STRUCT_TYPE_POINTER) {
Trap_Type(val);
}
i = (u64) VAL_INT64(val);
d = (double)i;
break;
case REB_STRUCT:
if (STRUCT_TYPE_STRUCT != field->type) {
Trap_Type(val);
}
break;
default:
Trap_Type(val);
}
switch (field->type) {
case STRUCT_TYPE_INT8:
*(i8*)data = (i8)i;
break;
case STRUCT_TYPE_UINT8:
*(u8*)data = (u8)i;
break;
case STRUCT_TYPE_INT16:
*(i16*)data = (i16)i;
break;
case STRUCT_TYPE_UINT16:
*(u16*)data = (u16)i;
break;
case STRUCT_TYPE_INT32:
*(i32*)data = (i32)i;
break;
case STRUCT_TYPE_UINT32:
*(u32*)data = (u32)i;
break;
case STRUCT_TYPE_INT64:
*(i64*)data = (i64)i;
break;
case STRUCT_TYPE_UINT64:
*(u64*)data = (u64)i;
break;
case STRUCT_TYPE_POINTER:
*(void**)data = (void*)i;
break;
case STRUCT_TYPE_FLOAT:
*(float*)data = (float)d;
break;
case STRUCT_TYPE_DOUBLE:
*(double*)data = (double)d;
break;
case STRUCT_TYPE_STRUCT:
if (field->size != VAL_STRUCT_LEN(val)) {
Trap_Arg(val);
}
if (same_fields(field->fields, VAL_STRUCT_FIELDS(val))) {
memcpy(data, SERIES_SKIP(VAL_STRUCT_DATA_BIN(val), VAL_STRUCT_OFFSET(val)), field->size);
} else {
Trap_Arg(val);
}
break;
default:
/* should never be here */
return FALSE;
}
return TRUE;
}
/***********************************************************************
**
*/ static REBFLG Set_Struct_Var(REBSTU *stu, REBVAL *word, REBVAL *elem, REBVAL *val)
/*
***********************************************************************/
{
struct Struct_Field *field = NULL;
REBCNT i = 0;
field = (struct Struct_Field *)SERIES_DATA(stu->fields);
for (i = 0; i < SERIES_TAIL(stu->fields); i ++, field ++) {
if (VAL_WORD_CANON(word) == VAL_SYM_CANON(BLK_SKIP(PG_Word_Table.series, field->sym))) {
if (field->array) {
if (elem == NULL) { //set the whole array
REBCNT n = 0;
if ((!IS_BLOCK(val) || field->dimension != VAL_LEN(val))) {
return FALSE;
}
for(n = 0; n < field->dimension; n ++) {
if (!assign_scalar(stu, field, n, VAL_BLK_SKIP(val, n))) {
return FALSE;
}
}
} else {// set only one element
if (!IS_INTEGER(elem)
|| VAL_INT32(elem) <= 0
|| VAL_INT32(elem) > field->dimension) {
return FALSE;
}
return assign_scalar(stu, field, VAL_INT32(elem) - 1, val);
}
return TRUE;
} else {
return assign_scalar(stu, field, 0, val);
}
return TRUE;
}
}
return FALSE;
}
/* parse struct attribute */
static void parse_attr (REBVAL *blk, REBINT *raw_size, REBUPT *raw_addr)
{
*raw_size = -1;
*raw_addr = 0;
REBVAL *attr = VAL_BLK_DATA(blk);
while (NOT_END(attr)) {
if (IS_SET_WORD(attr)) {
switch (VAL_WORD_CANON(attr)) {
case SYM_RAW_SIZE:
++ attr;
if (IS_INTEGER(attr)) {
if (*raw_size > 0) { /* duplicate raw-size */
Trap_Arg(attr);
}
*raw_size = VAL_INT64(attr);
if (*raw_size <= 0) {
Trap_Arg(attr);
}
} else {
Trap_Arg(attr);
}
break;
case SYM_RAW_MEMORY:
++ attr;
if (IS_INTEGER(attr)) {
if (*raw_addr != 0) { /* duplicate raw-memory */
Trap_Arg(attr);
}
*raw_addr = VAL_UNT64(attr);
if (*raw_addr == 0) {
Trap_Arg(attr);
}
} else {
Trap_Arg(attr);
}
break;
case SYM_EXTERN:
++ attr;
if (*raw_addr != 0) /* raw-memory is exclusive with extern */
Trap_Arg(attr);
if (!IS_BLOCK(attr)
|| VAL_LEN(attr) != 2) {
Trap_Arg(attr);
} else {
REBVAL *lib;
REBVAL *sym;
void *addr;
lib = VAL_BLK_SKIP(attr, 0);
sym = VAL_BLK_SKIP(attr, 1);
if (!IS_LIBRARY(lib))
Trap_Arg(attr);
if (IS_CLOSED_LIB(VAL_LIB_HANDLE(lib)))
Trap0(RE_BAD_LIBRARY);
if (!ANY_BINSTR(sym))
Trap_Arg(sym);
addr = OS_FIND_FUNCTION(LIB_FD(VAL_LIB_HANDLE(lib)), VAL_DATA(sym));
if (!addr)
Trap1(RE_SYMBOL_NOT_FOUND, sym);
*raw_addr = (REBUPT)addr;
}
break;
/*
case SYM_ALIGNMENT:
++ attr;
if (IS_INTEGER(attr)) {
alignment = VAL_INT64(attr);
} else {
Trap_Arg(attr);
}
break;
*/
default:
Trap_Arg(attr);
}
} else {
Trap_Arg(attr);
}
++ attr;
}
}
/* set storage memory to external addr: raw_addr */
static void set_ext_storage (REBVAL *out, REBINT raw_size, REBUPT raw_addr)
{
REBSER *ser = NULL;
if (raw_size >= 0 && raw_size != VAL_STRUCT_LEN(out)) {
Trap0(RE_INVALID_DATA);
}
ser = (REBSER *)Make_Node(SERIES_POOL);
Prop_Series(ser, VAL_STRUCT_DATA_BIN(out));
ser->data = (REBYTE*)raw_addr;
EXT_SERIES(ser);
VAL_STRUCT_DATA_BIN(out) = ser;
}
static REBOOL parse_field_type(struct Struct_Field *field, REBVAL *spec, REBVAL *inner, REBVAL **init)
{
REBVAL *val = VAL_BLK_DATA(spec);
if (IS_WORD(val)){
switch (VAL_WORD_CANON(val)) {
case SYM_UINT8:
field->type = STRUCT_TYPE_UINT8;
field->size = 1;
break;
case SYM_INT8:
field->type = STRUCT_TYPE_INT8;
field->size = 1;
break;
case SYM_UINT16:
field->type = STRUCT_TYPE_UINT16;
field->size = 2;
break;
case SYM_INT16:
field->type = STRUCT_TYPE_INT16;
field->size = 2;
break;
case SYM_UINT32:
field->type = STRUCT_TYPE_UINT32;
field->size = 4;
break;
case SYM_INT32:
field->type = STRUCT_TYPE_INT32;
field->size = 4;
break;
case SYM_UINT64:
field->type = STRUCT_TYPE_UINT64;
field->size = 8;
break;
case SYM_INT64:
field->type = STRUCT_TYPE_INT64;
field->size = 8;
break;
case SYM_FLOAT:
field->type = STRUCT_TYPE_FLOAT;
field->size = 4;
break;
case SYM_DOUBLE:
field->type = STRUCT_TYPE_DOUBLE;
field->size = 8;
break;
case SYM_POINTER:
field->type = STRUCT_TYPE_POINTER;
field->size = sizeof(void*);
break;
case SYM_STRUCT_TYPE:
++ val;
if (IS_BLOCK(val)) {
REBFLG res;
res = MT_Struct(inner, val, REB_STRUCT);
if (!res) {
//RL_Print("Failed to make nested struct!\n");
return FALSE;
}
field->size = SERIES_TAIL(VAL_STRUCT_DATA_BIN(inner));
field->type = STRUCT_TYPE_STRUCT;
field->fields = VAL_STRUCT_FIELDS(inner);
field->spec = VAL_STRUCT_SPEC(inner);
*init = inner; /* a shortcut for struct intialization */
} else {
Trap_Types(RE_EXPECT_VAL, REB_BLOCK, VAL_TYPE(val));
}
break;
case SYM_REBVAL:
field->type = STRUCT_TYPE_REBVAL;
field->size = sizeof(REBVAL);
break;
default:
Trap_Type(val);
}
} else if (IS_STRUCT(val)) { //[b: [struct-a] val-a]
field->size = SERIES_TAIL(VAL_STRUCT_DATA_BIN(val));
field->type = STRUCT_TYPE_STRUCT;
field->fields = VAL_STRUCT_FIELDS(val);
field->spec = VAL_STRUCT_SPEC(val);
*init = val;
} else {
Trap_Type(val);
}
++ val;
if (IS_BLOCK(val)) {// make struct! [a: [int32 [2]] [0 0]]
REBVAL *ret = Do_Blk(VAL_SERIES(val), 0);
if (!IS_INTEGER(ret)) {
Trap_Types(RE_EXPECT_VAL, REB_INTEGER, VAL_TYPE(val));
}
field->dimension = (REBCNT)VAL_INT64(ret);
field->array = TRUE;
++ val;
} else {
field->dimension = 1; /* scalar */
field->array = FALSE;
}
if (NOT_END(val)) {
Trap_Type(val);
}
return TRUE;
}
/***********************************************************************
**
*/ REBFLG MT_Struct(REBVAL *out, REBVAL *data, REBCNT type)
/*
* Format:
* make struct! [
* field1 [type1]
* field2: [type2] field2-init-value
* field3: [struct [field1 [type1]]]
* field4: [type1[3]]
* ...
* ]
***********************************************************************/
{
//RL_Print("%s\n", __func__);
REBINT max_fields = 16;
VAL_STRUCT_FIELDS(out) = Make_Series(max_fields, sizeof(struct Struct_Field), FALSE);
BARE_SERIES(VAL_STRUCT_FIELDS(out));
if (IS_BLOCK(data)) {
//Reduce_Block_No_Set(VAL_SERIES(data), 0, NULL);
//data = DS_POP;
REBVAL *blk = VAL_BLK_DATA(data);
REBINT field_idx = 0; /* for field index */
u64 offset = 0; /* offset in data */
REBCNT eval_idx = 0; /* for spec block evaluation */
REBVAL *init = NULL; /* for result to save in data */
REBOOL expect_init = FALSE;
REBINT raw_size = -1;
REBUPT raw_addr = 0;
REBCNT alignment = 0;
VAL_STRUCT_SPEC(out) = Copy_Series(VAL_SERIES(data));
VAL_STRUCT_DATA(out) = Make_Series(1, sizeof(struct Struct_Data), FALSE);
EXPAND_SERIES_TAIL(VAL_STRUCT_DATA(out), 1);
BARE_SERIES(VAL_STRUCT_DATA(out));
VAL_STRUCT_DATA_BIN(out) = Make_Series(max_fields << 2, 1, FALSE);
BARE_SERIES(VAL_STRUCT_DATA_BIN(out));
VAL_STRUCT_OFFSET(out) = 0;
/* set type early such that GC will handle it correctly, i.e, not collect series in the struct */
SET_TYPE(out, REB_STRUCT);
if (IS_BLOCK(blk)) {
parse_attr(blk, &raw_size, &raw_addr);
++ blk;
}
while (NOT_END(blk)) {
REBVAL *inner;
struct Struct_Field *field = NULL;
u64 step = 0;
EXPAND_SERIES_TAIL(VAL_STRUCT_FIELDS(out), 1);
DS_PUSH_NONE;
inner = DS_TOP; /* save in stack so that it won't be GC'ed when MT_Struct is recursively called */
field = (struct Struct_Field *)SERIES_SKIP(VAL_STRUCT_FIELDS(out), field_idx);
field->offset = (REBCNT)offset;
if (IS_SET_WORD(blk)) {
field->sym = VAL_WORD_SYM(blk);
expect_init = TRUE;
if (raw_addr) {
/* initialization is not allowed for raw memory struct */
Trap_Arg(blk);
}
} else if (IS_WORD(blk)) {
field->sym = VAL_WORD_SYM(blk);
expect_init = FALSE;
} else {
Trap_Type(blk);
}
++ blk;
if (!IS_BLOCK(blk)) {
Trap_Arg(blk);
}
if (!parse_field_type(field, blk, inner, &init)) { return FALSE; }
++ blk;
STATIC_ASSERT(sizeof(field->size) <= 4);
STATIC_ASSERT(sizeof(field->dimension) <= 4);
step = (u64)field->size * (u64)field->dimension;
if (step > VAL_STRUCT_LIMIT) {
Trap1(RE_SIZE_LIMIT, out);
}
EXPAND_SERIES_TAIL(VAL_STRUCT_DATA_BIN(out), step);
if (expect_init) {
if (IS_BLOCK(blk)) {
Reduce_Block(VAL_SERIES(blk), 0, NULL); //result is on stack
init = DS_POP;
++ blk;
} else {
eval_idx = blk - VAL_BLK_DATA(data);
eval_idx = Do_Next(VAL_SERIES(data), eval_idx, 0);
blk = VAL_BLK_SKIP(data, eval_idx);
init = DS_POP; //Do_Next saves result on stack
}
if (field->array) {
if (IS_INTEGER(init)) { /* interpreted as a C pointer */
void *ptr = (void *)VAL_INT64(init);
/* assuming it's an valid pointer and holding enough space */
memcpy(SERIES_SKIP(VAL_STRUCT_DATA_BIN(out), (REBCNT)offset), ptr, field->size * field->dimension);
} else if (IS_BLOCK(init)) {
REBCNT n = 0;
if (VAL_LEN(init) != field->dimension) {
Trap_Arg(init);
}
/* assign */
for (n = 0; n < field->dimension; n ++) {
if (!assign_scalar(&VAL_STRUCT(out), field, n, VAL_BLK_SKIP(init, n))) {
//RL_Print("Failed to assign element value\n");
goto failed;
}
}
} else {
Trap_Types(RE_EXPECT_VAL, REB_BLOCK, VAL_TYPE(blk));
}
} else {
/* scalar */
if (!assign_scalar(&VAL_STRUCT(out), field, 0, init)) {
//RL_Print("Failed to assign scalar value\n");
goto failed;
}
}
} else if (raw_addr == 0) {
if (field->type == STRUCT_TYPE_STRUCT) {
REBCNT n = 0;
for (n = 0; n < field->dimension; n ++) {
memcpy(SERIES_SKIP(VAL_STRUCT_DATA_BIN(out), ((REBCNT)offset) + n * field->size), SERIES_DATA(VAL_STRUCT_DATA_BIN(init)), field->size);
}
} else if (field->type == STRUCT_TYPE_REBVAL) {
REBVAL unset;
REBCNT n = 0;
SET_UNSET(&unset);
for (n = 0; n < field->dimension; n ++) {
if (!assign_scalar(&VAL_STRUCT(out), field, n, &unset)) {
//RL_Print("Failed to assign element value\n");
goto failed;
}
}
} else {
memset(SERIES_SKIP(VAL_STRUCT_DATA_BIN(out), (REBCNT)offset), 0, field->size * field->dimension);
}
}
offset += step;
/*
if (alignment != 0) {
offset = ((offset + alignment - 1) / alignment) * alignment;
}
*/
if (offset > VAL_STRUCT_LIMIT) {
Trap1(RE_SIZE_LIMIT, out);
}
field->done = TRUE;
++ field_idx;
DS_POP; /* pop up the inner struct*/
}
VAL_STRUCT_LEN(out) = (REBCNT)offset;
if (raw_addr) {
set_ext_storage(out, raw_size, raw_addr);
}
return TRUE;
}
failed:
Free_Series(VAL_STRUCT_FIELDS(out));
Free_Series(VAL_STRUCT_SPEC(out));
Free_Series(VAL_STRUCT_DATA_BIN(out));
Free_Series(VAL_STRUCT_DATA(out));
return FALSE;
}
/***********************************************************************
**
*/ REBINT PD_Struct(REBPVS *pvs)
/*
***********************************************************************/
{
struct Struct_Field *field = NULL;
REBCNT i = 0;
REBSTU *stu = &VAL_STRUCT(pvs->value);
if (!IS_WORD(pvs->select)) {
return PE_BAD_SELECT;
}
if (! pvs->setval || NOT_END(pvs->path + 1)) {
if (!Get_Struct_Var(stu, pvs->select, pvs->store)) {
return PE_BAD_SELECT;
}
/* Setting element to an array in the struct:
* struct/field/1: 0
* */
if (pvs->setval
&& IS_BLOCK(pvs->store)
&& IS_END(pvs->path + 2)) {
REBVAL *sel = pvs->select;
pvs->value = pvs->store;
Next_Path(pvs); // sets value in pvs->value
if (!Set_Struct_Var(stu, sel, pvs->select, pvs->value)) {
return PE_BAD_SET;
}
return PE_OK;
}
return PE_USE;
} else {// setval && END
if (!Set_Struct_Var(stu, pvs->select, NULL, pvs->setval)) {
return PE_BAD_SET;
}
return PE_OK;
}
return PE_BAD_SELECT;
}
REBINT Cmp_Struct(REBVAL *s, REBVAL *t)
{
REBINT n = VAL_STRUCT_FIELDS(s) - VAL_STRUCT_FIELDS(t);
if (n != 0) {
return n;
}
n = VAL_STRUCT_DATA(s) - VAL_STRUCT_DATA(t);
return n;
}
/***********************************************************************
**
*/ REBINT CT_Struct(REBVAL *a, REBVAL *b, REBINT mode)
/*
***********************************************************************/
{
//printf("comparing struct a (%p) with b (%p), mode: %d\n", a, b, mode);
switch (mode) {
case 3: /* same? */
case 2: /* strict equality */
return 0 == Cmp_Struct(a, b);
case 1: /* equvilance */
case 0: /* coersed equality*/
if (Cmp_Struct(a, b) == 0) {
return 1;
}
return IS_STRUCT(a) && IS_STRUCT(b)
&& same_fields(VAL_STRUCT_FIELDS(a), VAL_STRUCT_FIELDS(b))
&& VAL_STRUCT_LEN(a) == VAL_STRUCT_LEN(b)
&& !memcmp(SERIES_DATA(VAL_STRUCT_DATA_BIN(a)), SERIES_DATA(VAL_STRUCT_DATA_BIN(b)), VAL_STRUCT_LEN(a));
default:
return -1;
}
return -1;
}
void Copy_Struct(REBSTU *src, REBSTU *dst)
{
/* Read only fields */
dst->spec = src->spec;
dst->fields = src->fields;
/* writable field */
dst->data = Copy_Series(src->data);
BARE_SERIES(dst->data);
STRUCT_DATA_BIN(dst) = Copy_Series(STRUCT_DATA_BIN(src));
}
void Copy_Struct_Val(REBVAL *src, REBVAL *dst)
{
SET_TYPE(dst, REB_STRUCT);
Copy_Struct(&VAL_STRUCT(src), &VAL_STRUCT(dst));
}
/* a: make struct! [uint 8 i: 1]
* b: make a [i: 10]
*/
static void init_fields(REBVAL *ret, REBVAL *spec)
{
REBVAL *blk = NULL;
for (blk = VAL_BLK_DATA(spec); NOT_END(blk); blk += 2) {
struct Struct_Field *fld = NULL;
REBSER *fields = VAL_STRUCT_FIELDS(ret);
int i = 0;
REBVAL *word = blk;
REBVAL *fld_val = blk + 1;
if (IS_BLOCK(word)) { /* options: raw-memory, etc */
REBINT raw_size = -1;
REBUPT raw_addr = 0;
if (VAL_TAIL(spec) != 1) { /* make sure no other field initialization */
Trap_Arg(spec);
}
parse_attr(word, &raw_size, &raw_addr);
set_ext_storage(ret, raw_size, raw_addr);
break;
} else if (! IS_SET_WORD(word)) {
Trap_Arg(word);
}
if (IS_END(fld_val)) {
Trap1(RE_NEED_VALUE, fld_val);
}
for (i = 0; i < SERIES_TAIL(fields); i ++) {
fld = (struct Struct_Field*)SERIES_SKIP(fields, i);
if (fld->sym == VAL_WORD_CANON(word)) {
if (fld->dimension > 1) {
REBCNT n = 0;
if (IS_BLOCK(fld_val)) {
if (VAL_LEN(fld_val) != fld->dimension) {
Trap_Arg(fld_val);
}
for(n = 0; n < fld->dimension; n ++) {
if (!assign_scalar(&VAL_STRUCT(ret), fld, n, VAL_BLK_SKIP(fld_val, n))) {
Trap_Arg(fld_val);
}
}
} else if (IS_INTEGER(fld_val)) {
void *ptr = (void *)VAL_INT64(fld_val);
/* assuming it's an valid pointer and holding enough space */
memcpy(SERIES_SKIP(VAL_STRUCT_DATA_BIN(ret), fld->offset), ptr, fld->size * fld->dimension);
} else {
Trap_Arg(fld_val);
}
} else {
if (!assign_scalar(&VAL_STRUCT(ret), fld, 0, fld_val)) {
Trap_Arg(fld_val);
}
}
break;
}
}
if (i == SERIES_TAIL(fields)) {
Trap_Arg(word); /* field not found in the parent struct */
}
}
}
/***********************************************************************
**
*/ REBTYPE(Struct)
/*
***********************************************************************/
{
REBVAL *val;
REBVAL *arg;
REBSTU *strut;
REBVAL *ret;
arg = D_ARG(2);
val = D_ARG(1);
strut = 0;
ret = DS_RETURN;
// unary actions
switch(action) {
case A_MAKE:
//RL_Print("%s, %d, Make struct action\n", __func__, __LINE__);
case A_TO:
//RL_Print("%s, %d, To struct action\n", __func__, __LINE__);
// Clone an existing STRUCT:
if (IS_STRUCT(val)) {