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1246 lines (1077 loc) · 41.3 KB
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#include "devs_internal.h"
#include "devs_objects.h"
// #define LOG_TAG "obj"
#include "devs_logging.h"
void devs_map_clear(devs_ctx_t *ctx, devs_map_t *map) {
if (map->data) {
devs_free(ctx, map->data);
map->data = NULL;
map->capacity = 0;
map->length = 0;
}
}
static inline uint16_t *short_keys(devs_short_map_t *map) {
return (uint16_t *)(map->short_data + map->capacity);
}
static value_t *lookup_short(devs_ctx_t *ctx, devs_short_map_t *map, uint16_t key) {
unsigned len = map->length;
uint16_t *keys = short_keys(map);
for (unsigned i = 0; i < len; i++) {
if (keys[i] == key) {
return &map->short_data[i];
}
}
return NULL;
}
static value_t *lookup(devs_ctx_t *ctx, devs_map_t *map, value_t key) {
if (!devs_is_string(ctx, key))
return NULL;
value_t *data = map->data;
uint32_t kh = devs_handle_value(key);
unsigned len2 = map->length * 2;
// do a quick reference-only check
for (unsigned i = 0; i < len2; i += 2) {
// check the low bits first, since they are more likely to be different
if (devs_handle_value(data[i]) == kh && data[i].u64 == key.u64) {
return &data[i + 1];
}
}
// slow path - compare strings
unsigned ksz, csz;
const char *cp, *kp = devs_string_get_utf8(ctx, key, &ksz);
for (unsigned i = 0; i < len2; i += 2) {
cp = devs_string_get_utf8(ctx, data[i], &csz);
if (csz == ksz && memcmp(kp, cp, ksz) == 0)
return &data[i + 1];
}
// nothing found...
return NULL;
}
static value_t proto_value(devs_ctx_t *ctx, const devs_builtin_proto_entry_t *p) {
unsigned idx = p->builtin_idx;
if (idx <= DEVS_BUILTIN_OBJECT___MAX)
return devs_builtin_object_value(ctx, idx);
JD_ASSERT(idx >= DEVS_FIRST_BUILTIN_FUNCTION);
return devs_value_from_handle(DEVS_HANDLE_TYPE_STATIC_FUNCTION, idx);
}
unsigned devs_maplike_iter(devs_ctx_t *ctx, devs_maplike_t *src, void *userdata,
devs_map_iter_cb_t cb) {
if (devs_is_service_spec(ctx, src)) {
// Object.keys() etc or debugger inspection on compiled spec
// return empty for now, do not crash
return 0;
} else if (devs_is_builtin_proto(src)) {
const devs_builtin_proto_t *proto = (const devs_builtin_proto_t *)src;
const devs_builtin_proto_entry_t *p = proto->entries;
while (p->builtin_string_id) {
if (cb)
cb(ctx, userdata, devs_builtin_string(p->builtin_string_id), proto_value(ctx, p));
p++;
}
return p - proto->entries;
} else {
JD_ASSERT(devs_is_map(src));
devs_map_t *srcmap = (devs_map_t *)src;
unsigned len = srcmap->length;
if (cb != NULL) {
unsigned len2 = srcmap->length * 2;
value_t *data = srcmap->data;
for (unsigned i = 0; i < len2; i += 2) {
cb(ctx, userdata, data[i], data[i + 1]);
}
}
if (devs_gc_tag(srcmap) == DEVS_GC_TAG_HALF_STATIC_MAP)
len += devs_maplike_iter(ctx, srcmap->proto, userdata, cb);
return len;
}
}
void devs_map_copy_into(devs_ctx_t *ctx, devs_map_t *dst, devs_maplike_t *src) {
devs_maplike_iter(ctx, src, dst, (devs_map_iter_cb_t)devs_map_set);
}
struct kv_ctx {
unsigned dp;
bool keys;
devs_array_t *arr;
};
static void kv_add(devs_ctx_t *ctx, void *userdata, value_t k, value_t v) {
struct kv_ctx *acc = userdata;
acc->arr->data[acc->dp++] = acc->keys ? k : v;
}
bool devs_maplike_is_map(devs_ctx_t *ctx, devs_maplike_t *src) {
if (src == NULL || devs_is_builtin_proto(src) || devs_is_service_spec(ctx, src))
return false;
JD_ASSERT(devs_is_map(src));
return true;
}
void devs_maplike_keys_or_values(devs_ctx_t *ctx, devs_maplike_t *src, devs_array_t *arr,
bool keys) {
struct kv_ctx acc = {
.dp = arr->length,
.arr = arr,
.keys = keys,
};
unsigned len = devs_maplike_iter(ctx, src, NULL, NULL);
if (devs_array_insert(ctx, arr, acc.dp, len) != 0)
return;
devs_maplike_iter(ctx, src, &acc, kv_add);
}
static int grow_len(int capacity) {
int newlen = capacity * 10 / 8;
if (newlen < 4)
newlen = 4;
return newlen;
}
void devs_map_set(devs_ctx_t *ctx, devs_map_t *map, value_t key, value_t v) {
value_t *tmp = lookup(ctx, map, key);
if (tmp != NULL) {
*tmp = v;
return;
}
if (!devs_is_string(ctx, key)) {
devs_throw_expecting_error(ctx, DEVS_BUILTIN_STRING_STRING, key);
return;
}
JD_ASSERT(map->capacity >= map->length);
if (map->capacity == map->length) {
int newlen = grow_len(map->capacity);
tmp = devs_try_alloc(ctx, newlen * (2 * sizeof(value_t)));
if (!tmp)
return;
map->capacity = newlen;
if (map->length) {
memcpy(tmp, map->data, map->length * sizeof(value_t) * 2);
}
map->data = tmp;
jd_gc_unpin(ctx->gc, tmp);
}
map->data[map->length * 2] = key;
map->data[map->length * 2 + 1] = v;
map->length++;
}
void devs_short_map_set(devs_ctx_t *ctx, devs_short_map_t *map, uint16_t key, value_t v) {
value_t *tmp = lookup_short(ctx, map, key);
if (tmp != NULL) {
*tmp = v;
return;
}
JD_ASSERT(map->capacity >= map->length);
if (map->capacity == map->length) {
int newlen = grow_len(map->capacity);
tmp = devs_try_alloc(ctx, newlen * (sizeof(value_t) + sizeof(uint16_t)));
if (!tmp)
return;
uint16_t *srckeys = short_keys(map);
map->capacity = newlen;
if (map->length) {
memcpy(tmp, map->short_data, map->length * sizeof(value_t));
memcpy(tmp + newlen, srckeys, map->length * sizeof(uint16_t));
}
map->short_data = tmp;
jd_gc_unpin(ctx->gc, tmp);
}
map->short_data[map->length] = v;
short_keys(map)[map->length] = key;
map->length++;
}
int devs_map_delete(devs_ctx_t *ctx, devs_map_t *map, value_t key) {
value_t *tmp = lookup(ctx, map, key);
if (tmp == NULL) {
return -1;
}
tmp--;
unsigned off = tmp - map->data;
unsigned trailing = map->length - off / 2 - 1;
map->length--;
if (trailing)
memmove(tmp, tmp + 2, trailing * 2 * sizeof(value_t));
return 0;
}
bool devs_is_service_spec(devs_ctx_t *ctx, const void *ptr) {
return (uintptr_t)((const uint8_t *)ptr -
(const uint8_t *)devs_img_get_service_spec(ctx->img, 0)) <
(sizeof(devs_service_spec_t) * ctx->img.header->num_service_specs);
}
value_t devs_map_get(devs_ctx_t *ctx, devs_map_t *map, value_t key) {
value_t *tmp = lookup(ctx, map, key);
if (tmp == NULL)
return devs_undefined;
return *tmp;
}
value_t devs_short_map_get(devs_ctx_t *ctx, devs_short_map_t *map, uint16_t key) {
value_t *tmp = lookup_short(ctx, map, key);
if (tmp == NULL)
return devs_undefined;
return *tmp;
}
static const devs_builtin_proto_t *get_static_built_in_proto(devs_ctx_t *ctx, unsigned idx) {
JD_ASSERT(idx <= DEVS_BUILTIN_OBJECT___MAX);
if (devs_builtin_protos[idx].entries == NULL)
return NULL; // not there?
return &devs_builtin_protos[idx];
}
static const uint8_t builtin_proto_idx[] = {
[DEVS_BUILTIN_OBJECT_MATH] = 1,
[DEVS_BUILTIN_OBJECT_BUFFER_PROTOTYPE] = 2,
[DEVS_BUILTIN_OBJECT_ARRAY_PROTOTYPE] = 3,
[DEVS_BUILTIN_OBJECT_STRING_PROTOTYPE] = 4,
[DEVS_BUILTIN_OBJECT_DSREGISTER_PROTOTYPE] = 5,
[DEVS_BUILTIN_OBJECT_DSROLE_PROTOTYPE] = 6,
[DEVS_BUILTIN_OBJECT_DSEVENT_PROTOTYPE] = 7,
[DEVS_BUILTIN_OBJECT_DEVICESCRIPT] = 8,
[DEVS_BUILTIN_OBJECT_IMAGE_PROTOTYPE] = 9,
[DEVS_BUILTIN_OBJECT_BUFFER] = 10,
[DEVS_BUILTIN_OBJECT_GPIO_PROTOTYPE] = 11,
[DEVS_BUILTIN_OBJECT_GPIO] = 12,
};
#define MAX_PROTO 12
devs_maplike_t *devs_get_builtin_object(devs_ctx_t *ctx, unsigned idx) {
if (idx < sizeof(builtin_proto_idx)) {
unsigned midx = builtin_proto_idx[idx];
if (midx > 0) {
midx--;
if (ctx->_builtin_protos == NULL) {
ctx->_builtin_protos = devs_try_alloc(ctx, sizeof(void *) * MAX_PROTO);
ctx->_num_builtin_protos = MAX_PROTO;
if (ctx->_builtin_protos == NULL)
return NULL; // whoops
}
JD_ASSERT(midx < MAX_PROTO);
devs_map_t *m = ctx->_builtin_protos[midx];
if (m == NULL) {
m = devs_any_try_alloc(ctx, DEVS_GC_TAG_HALF_STATIC_MAP, sizeof(devs_map_t));
if (m != NULL) {
ctx->_builtin_protos[midx] = m;
m->proto = (devs_maplike_t *)get_static_built_in_proto(ctx, idx);
}
}
return (devs_maplike_t *)m;
}
}
return (devs_maplike_t *)get_static_built_in_proto(ctx, idx);
}
bool devs_static_streq(devs_ctx_t *ctx, unsigned stridx, const char *other, unsigned other_len) {
unsigned size;
const char *r = devs_img_get_utf8(ctx->img, stridx, &size);
if (other_len != size)
return false;
return memcmp(r, other, size) == 0;
}
#define MAX_OFF_BITS (DEVS_PACK_SHIFT - DEVS_ROLE_BITS)
value_t devs_value_from_service_spec_idx(devs_ctx_t *ctx, unsigned idx) {
return devs_value_from_handle(DEVS_HANDLE_TYPE_ROLE_MEMBER,
DEVS_ROLE_INVALID | (idx << DEVS_ROLE_BITS));
}
value_t devs_value_from_service_spec(devs_ctx_t *ctx, const devs_service_spec_t *spec) {
unsigned idx = spec - devs_img_get_service_spec(ctx->img, 0);
JD_ASSERT(idx < ctx->img.header->num_service_specs);
return devs_value_from_service_spec_idx(ctx, idx);
}
value_t devs_value_from_packet_spec(devs_ctx_t *ctx, const devs_packet_spec_t *pkt) {
if (pkt == NULL)
return devs_undefined;
const uint32_t *baseoff = (const void *)devs_img_get_service_spec(ctx->img, 0);
uintptr_t off = (const uint32_t *)pkt - baseoff;
JD_ASSERT(off < (1 << MAX_OFF_BITS));
return devs_value_from_handle(DEVS_HANDLE_TYPE_ROLE_MEMBER,
DEVS_ROLE_INVALID | (off << DEVS_ROLE_BITS));
}
int devs_value_to_service_spec_idx(devs_ctx_t *ctx, value_t v) {
if (devs_handle_type(v) != DEVS_HANDLE_TYPE_ROLE_MEMBER)
return -1;
unsigned off = devs_handle_value(v) >> DEVS_ROLE_BITS;
if (off < ctx->img.header->num_service_specs)
return off;
return -1;
}
const devs_service_spec_t *devs_value_to_service_spec(devs_ctx_t *ctx, value_t v) {
int off = devs_value_to_service_spec_idx(ctx, v);
if (off < 0)
return NULL;
return devs_img_get_service_spec(ctx->img, off);
}
const devs_packet_spec_t *devs_decode_role_packet(devs_ctx_t *ctx, value_t v, unsigned *roleidx) {
if (roleidx)
*roleidx = DEVS_ROLE_INVALID;
if (devs_handle_type(v) != DEVS_HANDLE_TYPE_ROLE_MEMBER)
return NULL;
if (devs_value_to_service_spec(ctx, v))
return NULL;
uint32_t h = devs_handle_value(v);
if (roleidx)
*roleidx = h & DEVS_ROLE_MASK;
return devs_img_get_packet_spec(ctx->img, h >> DEVS_ROLE_BITS);
}
int devs_spec_idx(devs_ctx_t *ctx, const devs_service_spec_t *spec) {
if (spec == NULL)
return -1;
unsigned idx = spec - devs_img_get_service_spec(ctx->img, 0);
JD_ASSERT(idx < ctx->img.header->num_service_specs);
return idx;
}
const devs_service_spec_t *devs_role_spec_for_class(devs_ctx_t *ctx, uint32_t cls) {
for (unsigned i = 0; i < ctx->img.header->num_service_specs; ++i) {
const devs_service_spec_t *spec = devs_img_get_service_spec(ctx->img, i);
if (spec->service_class == cls)
return spec;
}
return NULL;
}
int devs_packet_spec_parent(devs_ctx_t *ctx, const devs_packet_spec_t *pspec) {
int off = (uint8_t *)pspec - ctx->img.data - ctx->img.header->service_specs.start;
for (unsigned i = 0; i < ctx->img.header->num_service_specs; ++i) {
const devs_service_spec_t *spec = devs_img_get_service_spec(ctx->img, i);
int idx = off - 4 * spec->packets_offset;
if (0 <= idx && idx < (int)(spec->num_packets * sizeof(devs_packet_spec_t)))
return i;
}
JD_PANIC();
return -1;
}
const devs_service_spec_t *devs_role_spec(devs_ctx_t *ctx, unsigned roleidx) {
if (roleidx >= DEVS_ROLE_FIRST_SPEC) {
unsigned specidx = roleidx - DEVS_ROLE_FIRST_SPEC;
if (specidx >= ctx->img.header->num_service_specs)
return NULL;
return devs_img_get_service_spec(ctx->img, specidx);
}
devs_role_t *r = devs_role(ctx, roleidx);
if (!r)
return NULL;
return devs_role_spec_for_class(ctx, r->jdrole->service_class);
}
devs_role_t *devs_role_or_fail(devs_ctx_t *ctx, unsigned roleidx) {
devs_role_t *r = devs_role(ctx, roleidx);
if (r == NULL)
devs_invalid_program(ctx, 60130);
return r;
}
jd_device_service_t *devs_role_service(devs_ctx_t *ctx, unsigned roleidx) {
devs_role_t *r = devs_role(ctx, roleidx);
if (r == NULL)
return NULL;
return r->jdrole->service;
}
const char *devs_role_name(devs_ctx_t *ctx, unsigned idx) {
devs_role_t *r = devs_role(ctx, idx);
if (r == NULL)
return "???";
return r->jdrole->name;
}
const devs_service_spec_t *devs_get_base_spec(devs_ctx_t *ctx, const devs_service_spec_t *spec) {
if (spec->service_class == JD_SERVICE_CLASS_BASE)
return NULL;
int idx = spec->flags & DEVS_SERVICESPEC_FLAG_DERIVE_MASK;
JD_ASSERT(idx <= DEVS_SERVICESPEC_FLAG_DERIVE_LAST);
return devs_img_get_service_spec(ctx->img, idx);
}
value_t devs_spec_lookup(devs_ctx_t *ctx, const devs_service_spec_t *spec, value_t key) {
while (spec) {
JD_ASSERT(devs_is_service_spec(ctx, spec));
const devs_packet_spec_t *pkts = devs_img_get_packet_spec(ctx->img, spec->packets_offset);
unsigned num_packets = spec->num_packets;
if (devs_handle_type(key) == DEVS_HANDLE_TYPE_IMG_BUFFERISH) {
unsigned kidx = devs_handle_value(key);
for (unsigned i = 0; i < num_packets; ++i) {
if (pkts[i].name_idx == kidx)
return devs_value_from_packet_spec(ctx, &pkts[i]);
}
}
unsigned ksz;
const char *kptr = devs_string_get_utf8(ctx, key, &ksz);
if (ksz == 0)
return devs_undefined;
for (unsigned i = 0; i < num_packets; ++i) {
if (devs_static_streq(ctx, pkts[i].name_idx, kptr, ksz))
return devs_value_from_packet_spec(ctx, &pkts[i]);
}
spec = devs_get_base_spec(ctx, spec);
}
return devs_undefined;
}
static value_t devs_proto_lookup(devs_ctx_t *ctx, const devs_builtin_proto_t *proto, value_t key) {
JD_ASSERT(devs_is_proto(proto));
while (proto) {
const devs_builtin_proto_entry_t *p = proto->entries;
if (devs_handle_type(key) == DEVS_HANDLE_TYPE_IMG_BUFFERISH &&
(devs_handle_value(key) >> DEVS_STRIDX__SHIFT) == DEVS_STRIDX_BUILTIN) {
unsigned kidx = devs_handle_value(key) & ((1 << DEVS_STRIDX__SHIFT) - 1);
while (p->builtin_string_id) {
if (p->builtin_string_id == kidx)
return proto_value(ctx, p);
p++;
}
} else {
unsigned ksz;
const char *kptr = devs_string_get_utf8(ctx, key, &ksz);
if (ksz != strlen(kptr))
return devs_undefined;
while (p->builtin_string_id) {
if (strcmp(devs_builtin_string_by_idx(p->builtin_string_id), kptr) == 0)
return proto_value(ctx, p);
p++;
}
}
proto = proto->parent;
}
return devs_undefined;
}
static value_t devs_function_bind_alloc(devs_ctx_t *ctx, value_t obj, value_t fn) {
devs_bound_function_t *res =
devs_any_try_alloc(ctx, DEVS_GC_TAG_BOUND_FUNCTION, sizeof(devs_bound_function_t));
if (res == NULL)
return devs_undefined;
res->this_val = obj;
res->func = fn;
return devs_value_from_gc_obj(ctx, res);
}
static const devs_builtin_function_t *devs_get_property_desc(devs_ctx_t *ctx, value_t fn) {
int htp = devs_handle_type(fn);
if (htp != DEVS_HANDLE_TYPE_STATIC_FUNCTION)
return NULL;
unsigned fidx = devs_handle_value(fn);
int bltin = fidx - DEVS_FIRST_BUILTIN_FUNCTION;
if (bltin >= 0) {
JD_ASSERT(bltin < devs_num_builtin_functions);
const devs_builtin_function_t *h = &devs_builtin_functions[bltin];
if (h->flags & DEVS_BUILTIN_FLAG_IS_PROPERTY) {
JD_ASSERT(h->num_args == 0);
return h;
}
}
return NULL;
}
// if `fn` is a static function, return `(obj, fn)` tuple
// if `fn` is a role member and `obj` is role, return (a different) `(obj, fn)` tuple
// otherwise return `obj`
// it may allocate an object for the tuple, but typically it doesn't
value_t devs_function_bind(devs_ctx_t *ctx, value_t obj, value_t fn) {
int htp = devs_handle_type(fn);
if (htp == DEVS_HANDLE_TYPE_ROLE_MEMBER && devs_handle_type(obj) == DEVS_HANDLE_TYPE_ROLE &&
!devs_value_to_service_spec(ctx, fn)) {
uint32_t role = devs_handle_value(obj);
JD_ASSERT((role & DEVS_ROLE_MASK) == role);
role |= devs_handle_value(fn) & ~DEVS_ROLE_MASK;
return devs_value_from_handle(DEVS_HANDLE_TYPE_ROLE_MEMBER, role);
}
if (htp == DEVS_HANDLE_TYPE_CLOSURE)
return devs_function_bind_alloc(ctx, obj, fn);
if (htp != DEVS_HANDLE_TYPE_STATIC_FUNCTION)
return fn;
const devs_builtin_function_t *h = devs_get_property_desc(ctx, fn);
if (h)
return h->handler.prop(ctx, obj);
unsigned fidx = devs_handle_value(fn);
int otp = devs_handle_type(obj);
if (fidx <= 0xffff)
switch (otp) {
case DEVS_HANDLE_TYPE_SPECIAL:
case DEVS_HANDLE_TYPE_FIBER:
case DEVS_HANDLE_TYPE_ROLE:
case DEVS_HANDLE_TYPE_ROLE_MEMBER:
case DEVS_HANDLE_TYPE_STATIC_FUNCTION:
case DEVS_HANDLE_TYPE_IMG_BUFFERISH: {
uint32_t hv = devs_handle_value(obj);
JD_ASSERT((((uint32_t)otp << DEVS_PACK_SHIFT) >> DEVS_PACK_SHIFT) == (uint32_t)otp);
JD_ASSERT((hv >> DEVS_PACK_SHIFT) == 0);
JD_ASSERT(devs_handle_high_value(obj) == 0);
return devs_value_from_handle(DEVS_HANDLE_TYPE_BOUND_FUNCTION_STATIC | (fidx << 4),
(otp << DEVS_PACK_SHIFT) | hv);
}
case DEVS_HANDLE_TYPE_GC_OBJECT:
JD_ASSERT(devs_handle_high_value(obj) == 0);
return devs_value_from_handle(DEVS_HANDLE_TYPE_BOUND_FUNCTION | (fidx << 4),
devs_handle_value(obj));
}
return devs_function_bind_alloc(ctx, obj, fn);
}
value_t devs_make_closure(devs_ctx_t *ctx, devs_activation_t *closure, unsigned fnidx) {
JD_ASSERT(fnidx <= 0xffff);
return devs_value_from_pointer(ctx, DEVS_HANDLE_TYPE_CLOSURE | (fnidx << 4), closure);
}
static int devs_get_fnidx_core(devs_ctx_t *ctx, value_t src, value_t *this_val,
devs_activation_t **closure, int depth) {
*closure = NULL;
*this_val = devs_undefined;
if (depth > 2)
return -1;
uint32_t hv = devs_handle_value(src);
switch (devs_handle_type(src)) {
case DEVS_HANDLE_TYPE_STATIC_FUNCTION:
*this_val = devs_undefined;
return hv;
case DEVS_HANDLE_TYPE_BOUND_FUNCTION_STATIC:
*this_val =
devs_value_from_handle(hv >> DEVS_PACK_SHIFT, hv & ((1 << DEVS_PACK_SHIFT) - 1));
return devs_handle_high_value(src);
case DEVS_HANDLE_TYPE_BOUND_FUNCTION:
*this_val = devs_value_from_handle(DEVS_HANDLE_TYPE_GC_OBJECT, hv);
return devs_handle_high_value(src);
case DEVS_HANDLE_TYPE_CLOSURE:
*closure = devs_handle_ptr_value(ctx, src);
return devs_handle_high_value(src);
case DEVS_HANDLE_TYPE_GC_OBJECT: {
devs_bound_function_t *bnd = devs_handle_ptr_value(ctx, src);
if (devs_gc_tag(bnd) == DEVS_GC_TAG_BOUND_FUNCTION) {
int r = devs_get_fnidx_core(ctx, bnd->func, this_val, closure, depth + 1);
*this_val = bnd->this_val;
return r;
} else {
return -1;
}
}
default: {
if (devs_is_nullish(src))
return -1;
value_t f = devs_object_get_built_in_field(ctx, src, DEVS_BUILTIN_STRING___FUNC__);
if (devs_is_undefined(f))
return -1;
else {
int r = devs_get_fnidx_core(ctx, f, this_val, closure, depth + 1);
*this_val = src;
return r;
}
}
}
}
int devs_get_fnidx(devs_ctx_t *ctx, value_t src, value_t *this_val, devs_activation_t **closure) {
return devs_get_fnidx_core(ctx, src, this_val, closure, 0);
}
#define ATTACH_RW 0x01
#define ATTACH_ENUM 0x02
#define ATTACH_DIRECT 0x04
static void throw_field_error_str(devs_ctx_t *ctx, unsigned attach_flags, const char *objdesc) {
const char *op = attach_flags & ATTACH_RW ? "setting" : "getting";
char *objd = jd_strdup(objdesc);
if (devs_is_undefined(ctx->diag_field))
devs_throw_type_error(ctx, "%s fields of %s", op, objd);
else
devs_throw_type_error(ctx, "%s field '%s' of %s", op, devs_show_value(ctx, ctx->diag_field),
objd);
jd_free(objd);
}
static void throw_field_error(devs_ctx_t *ctx, unsigned attach_flags, value_t v) {
throw_field_error_str(ctx, attach_flags, devs_show_value(ctx, v));
}
static devs_maplike_t *devs_get_static_proto(devs_ctx_t *ctx, int tp, unsigned attach_flags) {
if ((attach_flags & (ATTACH_DIRECT | ATTACH_ENUM)) == ATTACH_ENUM)
return NULL;
devs_maplike_t *r = devs_get_builtin_object(ctx, tp);
// accessing prototype on static object - can't attach properties
if (attach_flags & ATTACH_RW) {
if (attach_flags & ATTACH_DIRECT) {
if (devs_is_builtin_proto(r)) {
throw_field_error_str(ctx, attach_flags, "a builtin frozen object");
return NULL;
} else {
JD_ASSERT(devs_is_map(r));
return r;
}
} else {
// note that in ES writing to string/... properties is no-op
// we make it an error
throw_field_error_str(ctx, attach_flags, "a primitive");
return NULL;
}
} else {
return r;
}
}
devs_map_t *devs_get_spec_proto(devs_ctx_t *ctx, uint32_t spec_idx) {
value_t r = devs_short_map_get(ctx, ctx->spec_protos, spec_idx);
if (!devs_is_undefined(r))
return devs_value_to_gc_obj(ctx, r);
devs_map_t *m = devs_any_try_alloc(ctx, DEVS_GC_TAG_HALF_STATIC_MAP, sizeof(devs_map_t));
if (m == NULL)
return NULL;
value_t v = devs_value_from_gc_obj(ctx, m);
devs_value_pin(ctx, v);
m->proto = (const void *)devs_img_get_service_spec(ctx->img, spec_idx);
devs_short_map_set(ctx, ctx->spec_protos, spec_idx, v);
devs_value_unpin(ctx, v);
return m;
}
devs_map_t *devs_get_role_proto(devs_ctx_t *ctx, unsigned roleidx) {
devs_role_t *r = devs_role(ctx, roleidx);
if (!r)
return NULL;
const devs_service_spec_t *spec = devs_role_spec_for_class(ctx, r->jdrole->service_class);
int idx = devs_spec_idx(ctx, spec);
if (idx < 0)
return NULL; // ???
return devs_get_spec_proto(ctx, idx);
}
static devs_maplike_t *devs_object_get_attached(devs_ctx_t *ctx, value_t v, unsigned attach_flags) {
static const uint8_t proto_by_object_type[] = {
[DEVS_OBJECT_TYPE_NUMBER] = DEVS_BUILTIN_OBJECT_NUMBER_PROTOTYPE,
[DEVS_OBJECT_TYPE_FIBER] = DEVS_BUILTIN_OBJECT_DSFIBER_PROTOTYPE,
[DEVS_OBJECT_TYPE_ROLE] = DEVS_BUILTIN_OBJECT_DSROLE_PROTOTYPE,
[DEVS_OBJECT_TYPE_FUNCTION] = DEVS_BUILTIN_OBJECT_FUNCTION_PROTOTYPE,
[DEVS_OBJECT_TYPE_STRING] = DEVS_BUILTIN_OBJECT_STRING_PROTOTYPE,
[DEVS_OBJECT_TYPE_BUFFER] = DEVS_BUILTIN_OBJECT_BUFFER_PROTOTYPE,
[DEVS_OBJECT_TYPE_IMAGE] = DEVS_BUILTIN_OBJECT_IMAGE_PROTOTYPE,
[DEVS_OBJECT_TYPE_BOOL] = DEVS_BUILTIN_OBJECT_BOOLEAN_PROTOTYPE,
[DEVS_OBJECT_TYPE_EXOTIC] = DEVS_BUILTIN_OBJECT_OBJECT_PROTOTYPE,
};
if (devs_is_null_or_undefined(v)) {
throw_field_error(ctx, attach_flags, v);
return NULL;
}
int htp = devs_handle_type(v);
if (htp == DEVS_HANDLE_TYPE_ROLE_MEMBER) {
unsigned roleidx;
int pt;
const devs_packet_spec_t *spec = devs_decode_role_packet(ctx, v, &roleidx);
if (roleidx == DEVS_ROLE_INVALID)
pt = devs_value_to_service_spec(ctx, v) ? DEVS_BUILTIN_OBJECT_DSSERVICESPEC_PROTOTYPE
: DEVS_BUILTIN_OBJECT_DSPACKETSPEC_PROTOTYPE;
else
switch (spec->code & DEVS_PACKETSPEC_CODE_MASK) {
case DEVS_PACKETSPEC_CODE_REGISTER:
pt = DEVS_BUILTIN_OBJECT_DSREGISTER_PROTOTYPE;
break;
case DEVS_PACKETSPEC_CODE_EVENT:
pt = DEVS_BUILTIN_OBJECT_DSEVENT_PROTOTYPE;
break;
case DEVS_PACKETSPEC_CODE_COMMAND:
pt = DEVS_BUILTIN_OBJECT_DSCOMMAND_PROTOTYPE;
break;
case DEVS_PACKETSPEC_CODE_REPORT:
pt = DEVS_BUILTIN_OBJECT_DSREPORT_PROTOTYPE;
break;
default:
JD_PANIC();
}
return devs_get_static_proto(ctx, pt, attach_flags);
}
if (htp == DEVS_HANDLE_TYPE_ROLE) {
unsigned roleidx = devs_handle_value(v);
devs_role_t *rl = devs_role(ctx, roleidx);
if (!rl)
return NULL;
const void *r = rl->attached;
if (r || (attach_flags & ATTACH_ENUM))
return r;
r = devs_get_role_proto(ctx, roleidx);
if (!r)
return NULL;
if (attach_flags & ATTACH_RW) {
devs_map_t *m = devs_map_try_alloc(ctx, r);
rl->attached = m;
r = m;
}
return r;
}
if (htp != DEVS_HANDLE_TYPE_GC_OBJECT) {
int pt = 0;
int tp = devs_value_typeof(ctx, v);
if (tp == DEVS_OBJECT_TYPE_MAP && devs_is_special(v)) {
uint32_t hv = devs_handle_value(v);
if (devs_handle_is_builtin(hv))
return devs_get_static_proto(ctx, hv - DEVS_SPECIAL_BUILTIN_OBJ_FIRST,
attach_flags | ATTACH_DIRECT);
}
if (tp == DEVS_OBJECT_TYPE_FUNCTION) {
value_t this_val;
devs_activation_t *closure;
int fidx = devs_get_fnidx(ctx, v, &this_val, &closure);
if (fidx >= 0) {
value_t r = devs_short_map_get(ctx, ctx->fn_values, fidx);
if (devs_is_undefined(r) && attach_flags) {
r = devs_value_from_gc_obj(
ctx,
devs_map_try_alloc(ctx, devs_get_builtin_object(
ctx, DEVS_BUILTIN_OBJECT_FUNCTION_PROTOTYPE)));
if (!devs_is_undefined(r)) {
devs_value_pin(ctx, r);
devs_short_map_set(ctx, ctx->fn_values, fidx, r);
devs_value_unpin(ctx, r);
}
}
if (!devs_is_undefined(r))
return devs_value_to_gc_obj(ctx, r);
}
}
if (tp < (int)sizeof(proto_by_object_type)) {
pt = proto_by_object_type[tp];
}
JD_ASSERT(pt != 0);
return devs_get_static_proto(ctx, pt, attach_flags);
}
devs_gc_object_t *obj = devs_handle_ptr_value(ctx, v);
devs_map_t **attached;
int builtin;
switch (devs_gc_tag(obj)) {
case DEVS_GC_TAG_BUFFER:
attached = &((devs_buffer_t *)obj)->attached;
builtin = DEVS_BUILTIN_OBJECT_BUFFER_PROTOTYPE;
break;
case DEVS_GC_TAG_IMAGE:
attached = &((devs_gimage_t *)obj)->attached;
builtin = DEVS_BUILTIN_OBJECT_IMAGE_PROTOTYPE;
break;
case DEVS_GC_TAG_ARRAY:
attached = &((devs_array_t *)obj)->attached;
builtin = DEVS_BUILTIN_OBJECT_ARRAY_PROTOTYPE;
break;
case DEVS_GC_TAG_PACKET:
attached = &((devs_packet_t *)obj)->attached;
builtin = DEVS_BUILTIN_OBJECT_DSPACKET_PROTOTYPE;
break;
case DEVS_GC_TAG_HALF_STATIC_MAP:
case DEVS_GC_TAG_MAP:
return (devs_maplike_t *)obj;
case DEVS_GC_TAG_STRING_JMP:
case DEVS_GC_TAG_STRING:
return devs_get_static_proto(ctx, DEVS_BUILTIN_OBJECT_STRING_PROTOTYPE, attach_flags);
case DEVS_GC_TAG_BOUND_FUNCTION:
return devs_get_static_proto(ctx, DEVS_BUILTIN_OBJECT_FUNCTION_PROTOTYPE, attach_flags);
case DEVS_GC_TAG_BUILTIN_PROTO:
case DEVS_GC_TAG_SHORT_MAP:
default:
JD_PANIC();
break;
}
devs_map_t *map = *attached;
if (!map && (attach_flags & ATTACH_RW)) {
map = *attached = devs_map_try_alloc(ctx, devs_get_builtin_object(ctx, builtin));
if (map == NULL)
return NULL;
}
if (map || (attach_flags & ATTACH_ENUM))
return (devs_maplike_t *)map;
else
return devs_get_builtin_object(ctx, builtin);
}
devs_map_t *devs_object_get_attached_rw(devs_ctx_t *ctx, value_t v) {
const void *r = devs_object_get_attached(ctx, v, ATTACH_RW);
JD_ASSERT(r == NULL || devs_is_map(r));
ctx->diag_field = devs_undefined;
return (void *)r;
}
devs_maplike_t *devs_object_get_attached_ro(devs_ctx_t *ctx, value_t v) {
devs_maplike_t *r = devs_object_get_attached(ctx, v, 0);
ctx->diag_field = devs_undefined;
return r;
}
devs_maplike_t *devs_object_get_attached_enum(devs_ctx_t *ctx, value_t v) {
devs_maplike_t *r = devs_object_get_attached(ctx, v, ATTACH_ENUM);
ctx->diag_field = devs_undefined;
return r;
}
devs_maplike_t *devs_maplike_get_proto(devs_ctx_t *ctx, devs_maplike_t *obj) {
const void *res;
if (devs_is_builtin_proto(obj)) {
res = ((const devs_builtin_proto_t *)obj)->parent;
} else if (devs_is_service_spec(ctx, obj)) {
res = devs_get_builtin_object(ctx, DEVS_BUILTIN_OBJECT_DSROLE_PROTOTYPE);
} else {
JD_ASSERT(devs_is_map(obj));
devs_map_t *map = (devs_map_t *)obj;
return map->proto;
}
if (res == NULL)
res = devs_get_builtin_object(ctx, DEVS_BUILTIN_OBJECT_OBJECT_PROTOTYPE);
if (obj == res) // Object.prototype.__proto__ == NULL
return NULL;
return res;
}
devs_maplike_t *devs_get_prototype_field(devs_ctx_t *ctx, value_t cls) {
value_t cls_proto_val = devs_object_get_built_in_field(ctx, cls, DEVS_BUILTIN_STRING_PROTOTYPE);
if (devs_is_undefined(cls_proto_val)) {
if (!ctx->in_throw)
devs_throw_type_error(ctx, "no .prototype");
return NULL;
} else {
devs_maplike_t *cls_proto = devs_object_get_attached_enum(ctx, cls_proto_val);
if (cls_proto == NULL)
devs_throw_type_error(ctx, "invalid .prototype");
return cls_proto;
}
}
bool devs_instance_of(devs_ctx_t *ctx, value_t obj, devs_maplike_t *cls_proto) {
if (cls_proto == NULL || devs_is_nullish(obj))
return false;
devs_maplike_t *proto = devs_object_get_attached_ro(ctx, obj);
devs_maplike_t *en = devs_object_get_attached_enum(ctx, obj);
if (proto && proto == en)
proto = devs_maplike_get_proto(ctx, proto);
if (proto == NULL)
return false;
while (proto) {
if (cls_proto == proto)
return true;
proto = devs_maplike_get_proto(ctx, proto);
}
return false;
}
value_t devs_maplike_get_no_bind(devs_ctx_t *ctx, devs_maplike_t *proto, value_t key) {
value_t ptmp, *tmp = NULL;
while (proto) {
devs_map_t *map;
if (devs_is_builtin_proto(proto)) {
ptmp = devs_proto_lookup(ctx, (const devs_builtin_proto_t *)proto, key);
tmp = &ptmp;
break;
} else if (devs_is_service_spec(ctx, proto)) {
ptmp = devs_spec_lookup(ctx, (const devs_service_spec_t *)proto, key);
if (!devs_is_undefined(ptmp)) {
tmp = &ptmp;
break;
} else {
proto = devs_get_builtin_object(ctx, DEVS_BUILTIN_OBJECT_DSROLE_PROTOTYPE);
continue;
}
} else {
JD_ASSERT(devs_is_map(proto));
map = (devs_map_t *)proto;
tmp = lookup(ctx, map, key);
if (tmp)
break;
}
proto = map->proto;
}
if (tmp == NULL)
return devs_undefined;
return *tmp;
}
value_t devs_object_get(devs_ctx_t *ctx, value_t obj, value_t key) {
ctx->diag_field = key;
value_t tmp = devs_maplike_get_no_bind(ctx, devs_object_get_attached_ro(ctx, obj), key);
return devs_function_bind(ctx, obj, tmp);
}
value_t devs_object_get_built_in_field(devs_ctx_t *ctx, value_t obj, unsigned idx) {
value_t key = devs_builtin_string(idx);
ctx->diag_field = key;
value_t fn = devs_maplike_get_no_bind(ctx, devs_object_get_attached_ro(ctx, obj), key);
const devs_builtin_function_t *h = devs_get_property_desc(ctx, fn);
if (h)
return h->handler.prop(ctx, obj);
return fn;
}
value_t devs_seq_get(devs_ctx_t *ctx, value_t seq, unsigned idx) {
if (idx > DEVS_MAX_ALLOC)
return devs_undefined;
unsigned len;
const uint8_t *p = devs_bufferish_data(ctx, seq, &len);
if (p && idx < len) {
if (devs_is_string(ctx, seq)) {
int off = devs_string_index(ctx, seq, idx);
if (off < 0)
return devs_undefined;
p += off;
unsigned len = devs_utf8_code_point_length((const char *)p);
return devs_value_from_gc_obj(ctx,
devs_string_try_alloc_init(ctx, (const char *)p, len));