DUK_LOCAL duk_uint8_t *duk__dump_uint32_prop(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func, duk_small_uint_t stridx, duk_uint32_t def_value) {
duk_tval *tv;
duk_uint32_t val;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_GET_STRING(thr, stridx));
if (tv != NULL && DUK_TVAL_IS_NUMBER(tv)) {
val = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv);
} else {
val = def_value;
}
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4, p);
DUK_RAW_WRITE_U32_BE(p, val);
return p;
}
DUK_LOCAL duk_uint8_t *duk__dump_varmap(duk_hthread *thr, duk_uint8_t *p, duk_bufwriter_ctx *bw_ctx, duk_hobject *func) {
duk_tval *tv;
tv = duk_hobject_find_existing_entry_tval_ptr(thr->heap, (duk_hobject *) func, DUK_HTHREAD_STRING_INT_VARMAP(thr));
if (tv != NULL && DUK_TVAL_IS_OBJECT(tv)) {
duk_hobject *h;
duk_uint_fast32_t i;
h = DUK_TVAL_GET_OBJECT(tv);
DUK_ASSERT(h != NULL);
/* We know _Varmap only has own properties so walk property
* table directly. We also know _Varmap is dense and all
* values are numbers; assert for these. GC and finalizers
* shouldn't affect _Varmap so side effects should be fine.
*/
for (i = 0; i < (duk_uint_fast32_t) DUK_HOBJECT_GET_ENEXT(h); i++) {
duk_hstring *key;
duk_tval *tv_val;
duk_uint32_t val;
key = DUK_HOBJECT_E_GET_KEY(thr->heap, h, i);
DUK_ASSERT(key != NULL); /* _Varmap is dense */
DUK_ASSERT(!DUK_HOBJECT_E_SLOT_IS_ACCESSOR(thr->heap, h, i));
tv_val = DUK_HOBJECT_E_GET_VALUE_TVAL_PTR(thr->heap, h, i);
DUK_ASSERT(tv_val != NULL);
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_val)); /* known to be number; in fact an integer */
#if defined(DUK_USE_FASTINT)
DUK_ASSERT(DUK_TVAL_IS_FASTINT(tv_val));
DUK_ASSERT(DUK_TVAL_GET_FASTINT(tv_val) == (duk_int64_t) DUK_TVAL_GET_FASTINT_U32(tv_val)); /* known to be 32-bit */
val = DUK_TVAL_GET_FASTINT_U32(tv_val);
#else
val = (duk_uint32_t) DUK_TVAL_GET_NUMBER(tv_val);
#endif
DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4 + DUK_HSTRING_GET_BYTELEN(key) + 4, p);
p = duk__dump_hstring_raw(p, key);
DUK_RAW_WRITE_U32_BE(p, val);
}
}
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 4, p);
DUK_RAW_WRITE_U32_BE(p, 0); /* end of _Varmap */
return p;
}
duk_bool_t duk_js_toboolean(duk_tval *tv) {
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL:
return 0;
case DUK_TAG_BOOLEAN:
return DUK_TVAL_GET_BOOLEAN(tv);
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h != NULL);
return (h->blen > 0 ? 1 : 0);
}
case DUK_TAG_OBJECT: {
return 1;
}
case DUK_TAG_BUFFER: {
/* mimic semantics for strings */
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
DUK_ASSERT(h != NULL);
return (DUK_HBUFFER_GET_SIZE(h) > 0 ? 1 : 0);
}
case DUK_TAG_POINTER: {
void *p = DUK_TVAL_GET_POINTER(tv);
return (p != NULL ? 1 : 0);
}
default: {
/* number */
int c;
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
c = DUK_FPCLASSIFY(DUK_TVAL_GET_NUMBER(tv));
if (c == DUK_FP_ZERO || c == DUK_FP_NAN) {
return 0;
} else {
return 1;
}
}
}
DUK_UNREACHABLE();
}
DUK_INTERNAL duk_bool_t duk_js_compare_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_int_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_double_t d1, d2;
duk_small_int_t c1, c2;
duk_small_int_t s1, s2;
duk_small_int_t rc;
duk_bool_t retval;
/* Fast path for fastints */
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
duk_int64_t v1 = DUK_TVAL_GET_FASTINT(tv_x);
duk_int64_t v2 = DUK_TVAL_GET_FASTINT(tv_y);
if (v1 < v2) {
/* 'lt is true' */
retval = 1;
} else {
retval = 0;
}
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval ^= 1;
}
return retval;
}
#endif /* DUK_USE_FASTINT */
/* Fast path for numbers (one of which may be a fastint) */
#if 1 /* XXX: make fast paths optional for size minimization? */
if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) {
d1 = DUK_TVAL_GET_NUMBER(tv_x);
d2 = DUK_TVAL_GET_NUMBER(tv_y);
c1 = DUK_FPCLASSIFY(d1);
c2 = DUK_FPCLASSIFY(d2);
if (c1 == DUK_FP_NORMAL && c2 == DUK_FP_NORMAL) {
/* XXX: this is a very narrow check, and doesn't cover
* zeroes, subnormals, infinities, which compare normally.
*/
if (d1 < d2) {
/* 'lt is true' */
retval = 1;
} else {
retval = 0;
}
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval ^= 1;
}
return retval;
}
}
#endif
/* Slow path */
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
if (flags & DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) {
duk_to_primitive(ctx, -2, DUK_HINT_NUMBER);
duk_to_primitive(ctx, -1, DUK_HINT_NUMBER);
} else {
duk_to_primitive(ctx, -1, DUK_HINT_NUMBER);
duk_to_primitive(ctx, -2, DUK_HINT_NUMBER);
}
/* Note: reuse variables */
tv_x = duk_get_tval(ctx, -2);
tv_y = duk_get_tval(ctx, -1);
if (DUK_TVAL_IS_STRING(tv_x) && DUK_TVAL_IS_STRING(tv_y)) {
duk_hstring *h1 = DUK_TVAL_GET_STRING(tv_x);
duk_hstring *h2 = DUK_TVAL_GET_STRING(tv_y);
DUK_ASSERT(h1 != NULL);
DUK_ASSERT(h2 != NULL);
rc = duk_js_string_compare(h1, h2);
if (rc < 0) {
goto lt_true;
} else {
goto lt_false;
}
} else {
/* Ordering should not matter (E5 Section 11.8.5, step 3.a) but
* preserve it just in case.
*/
if (flags & DUK_COMPARE_FLAG_EVAL_LEFT_FIRST) {
d1 = duk_to_number(ctx, -2);
d2 = duk_to_number(ctx, -1);
} else {
d2 = duk_to_number(ctx, -1);
d1 = duk_to_number(ctx, -2);
}
c1 = (duk_small_int_t) DUK_FPCLASSIFY(d1);
s1 = (duk_small_int_t) DUK_SIGNBIT(d1);
c2 = (duk_small_int_t) DUK_FPCLASSIFY(d2);
s2 = (duk_small_int_t) DUK_SIGNBIT(d2);
if (c1 == DUK_FP_NAN || c2 == DUK_FP_NAN) {
goto lt_undefined;
}
if (c1 == DUK_FP_ZERO && c2 == DUK_FP_ZERO) {
/* For all combinations: +0 < +0, +0 < -0, -0 < +0, -0 < -0,
* steps e, f, and g.
*/
goto lt_false;
}
if (d1 == d2) {
goto lt_false;
}
if (c1 == DUK_FP_INFINITE && s1 == 0) {
/* x == +Infinity */
goto lt_false;
}
if (c2 == DUK_FP_INFINITE && s2 == 0) {
/* y == +Infinity */
goto lt_true;
}
if (c2 == DUK_FP_INFINITE && s2 != 0) {
/* y == -Infinity */
goto lt_false;
}
if (c1 == DUK_FP_INFINITE && s1 != 0) {
/* x == -Infinity */
goto lt_true;
}
if (d1 < d2) {
goto lt_true;
}
goto lt_false;
}
lt_undefined:
/* Note: undefined from Section 11.8.5 always results in false
* return (see e.g. Section 11.8.3) - hence special treatment here.
*/
retval = 0;
goto cleanup;
lt_true:
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval = 0;
goto cleanup;
} else {
retval = 1;
goto cleanup;
}
/* never here */
lt_false:
if (flags & DUK_COMPARE_FLAG_NEGATE) {
retval = 1;
goto cleanup;
} else {
retval = 0;
goto cleanup;
}
/* never here */
cleanup:
duk_pop_2(ctx);
return retval;
}
DUK_INTERNAL duk_bool_t duk_js_equals_helper(duk_hthread *thr, duk_tval *tv_x, duk_tval *tv_y, duk_small_int_t flags) {
duk_context *ctx = (duk_context *) thr;
duk_tval *tv_tmp;
/* If flags != 0 (strict or SameValue), thr can be NULL. For loose
* equals comparison it must be != NULL.
*/
DUK_ASSERT(flags != 0 || thr != NULL);
/*
* Same type?
*
* Note: since number values have no explicit tag in the 8-byte
* representation, need the awkward if + switch.
*/
#if defined(DUK_USE_FASTINT)
if (DUK_TVAL_IS_FASTINT(tv_x) && DUK_TVAL_IS_FASTINT(tv_y)) {
if (DUK_TVAL_GET_FASTINT(tv_x) == DUK_TVAL_GET_FASTINT(tv_y)) {
return 1;
} else {
return 0;
}
}
else
#endif
if (DUK_TVAL_IS_NUMBER(tv_x) && DUK_TVAL_IS_NUMBER(tv_y)) {
/* Catches both doubles and cases where only one argument is a fastint */
if (DUK_UNLIKELY((flags & DUK_EQUALS_FLAG_SAMEVALUE) != 0)) {
/* SameValue */
return duk__js_samevalue_number(DUK_TVAL_GET_NUMBER(tv_x),
DUK_TVAL_GET_NUMBER(tv_y));
} else {
/* equals and strict equals */
return duk__js_equals_number(DUK_TVAL_GET_NUMBER(tv_x),
DUK_TVAL_GET_NUMBER(tv_y));
}
} else if (DUK_TVAL_GET_TAG(tv_x) == DUK_TVAL_GET_TAG(tv_y)) {
switch (DUK_TVAL_GET_TAG(tv_x)) {
case DUK_TAG_UNDEFINED:
case DUK_TAG_NULL: {
return 1;
}
case DUK_TAG_BOOLEAN: {
return DUK_TVAL_GET_BOOLEAN(tv_x) == DUK_TVAL_GET_BOOLEAN(tv_y);
}
case DUK_TAG_POINTER: {
return DUK_TVAL_GET_POINTER(tv_x) == DUK_TVAL_GET_POINTER(tv_y);
}
case DUK_TAG_STRING:
case DUK_TAG_OBJECT: {
/* heap pointer comparison suffices */
return DUK_TVAL_GET_HEAPHDR(tv_x) == DUK_TVAL_GET_HEAPHDR(tv_y);
}
case DUK_TAG_BUFFER: {
if ((flags & (DUK_EQUALS_FLAG_STRICT | DUK_EQUALS_FLAG_SAMEVALUE)) != 0) {
/* heap pointer comparison suffices */
return DUK_TVAL_GET_HEAPHDR(tv_x) == DUK_TVAL_GET_HEAPHDR(tv_y);
} else {
/* non-strict equality for buffers compares contents */
duk_hbuffer *h_x = DUK_TVAL_GET_BUFFER(tv_x);
duk_hbuffer *h_y = DUK_TVAL_GET_BUFFER(tv_y);
duk_size_t len_x = DUK_HBUFFER_GET_SIZE(h_x);
duk_size_t len_y = DUK_HBUFFER_GET_SIZE(h_y);
void *buf_x;
void *buf_y;
if (len_x != len_y) {
return 0;
}
buf_x = (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_x);
buf_y = (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_y);
/* if len_x == len_y == 0, buf_x and/or buf_y may
* be NULL, but that's OK.
*/
DUK_ASSERT(len_x == len_y);
DUK_ASSERT(len_x == 0 || buf_x != NULL);
DUK_ASSERT(len_y == 0 || buf_y != NULL);
return (DUK_MEMCMP(buf_x, buf_y, len_x) == 0) ? 1 : 0;
}
}
case DUK_TAG_LIGHTFUNC: {
/* At least 'magic' has a significant impact on function
* identity.
*/
duk_small_uint_t lf_flags_x;
duk_small_uint_t lf_flags_y;
duk_c_function func_x;
duk_c_function func_y;
DUK_TVAL_GET_LIGHTFUNC(tv_x, func_x, lf_flags_x);
DUK_TVAL_GET_LIGHTFUNC(tv_y, func_y, lf_flags_y);
return ((func_x == func_y) && (lf_flags_x == lf_flags_y)) ? 1 : 0;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_x));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv_y));
DUK_UNREACHABLE();
return 0;
}
}
}
if ((flags & (DUK_EQUALS_FLAG_STRICT | DUK_EQUALS_FLAG_SAMEVALUE)) != 0) {
return 0;
}
DUK_ASSERT(flags == 0); /* non-strict equality from here on */
/*
* Types are different; various cases for non-strict comparison
*
* Since comparison is symmetric, we use a "swap trick" to reduce
* code size.
*/
/* Undefined/null are considered equal (e.g. "null == undefined" -> true). */
if ((DUK_TVAL_IS_UNDEFINED(tv_x) && DUK_TVAL_IS_NULL(tv_y)) ||
(DUK_TVAL_IS_NULL(tv_x) && DUK_TVAL_IS_UNDEFINED(tv_y))) {
return 1;
}
/* Number/string-or-buffer -> coerce string to number (e.g. "'1.5' == 1.5" -> true). */
if (DUK_TVAL_IS_NUMBER(tv_x) && (DUK_TVAL_IS_STRING(tv_y) || DUK_TVAL_IS_BUFFER(tv_y))) {
/* the next 'if' is guaranteed to match after swap */
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if ((DUK_TVAL_IS_STRING(tv_x) || DUK_TVAL_IS_BUFFER(tv_x)) && DUK_TVAL_IS_NUMBER(tv_y)) {
/* XXX: this is possible without resorting to the value stack */
duk_double_t d1, d2;
d2 = DUK_TVAL_GET_NUMBER(tv_y);
duk_push_tval(ctx, tv_x);
duk_to_string(ctx, -1); /* buffer values are coerced first to string here */
duk_to_number(ctx, -1);
d1 = duk_require_number(ctx, -1);
duk_pop(ctx);
return duk__js_equals_number(d1, d2);
}
/* Buffer/string -> compare contents. */
if (DUK_TVAL_IS_BUFFER(tv_x) && DUK_TVAL_IS_STRING(tv_y)) {
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if (DUK_TVAL_IS_STRING(tv_x) && DUK_TVAL_IS_BUFFER(tv_y)) {
duk_hstring *h_x = DUK_TVAL_GET_STRING(tv_x);
duk_hbuffer *h_y = DUK_TVAL_GET_BUFFER(tv_y);
duk_size_t len_x = DUK_HSTRING_GET_BYTELEN(h_x);
duk_size_t len_y = DUK_HBUFFER_GET_SIZE(h_y);
void *buf_x;
void *buf_y;
if (len_x != len_y) {
return 0;
}
buf_x = (void *) DUK_HSTRING_GET_DATA(h_x);
buf_y = (void *) DUK_HBUFFER_GET_DATA_PTR(thr->heap, h_y);
/* if len_x == len_y == 0, buf_x and/or buf_y may
* be NULL, but that's OK.
*/
DUK_ASSERT(len_x == len_y);
DUK_ASSERT(len_x == 0 || buf_x != NULL);
DUK_ASSERT(len_y == 0 || buf_y != NULL);
return (DUK_MEMCMP(buf_x, buf_y, len_x) == 0) ? 1 : 0;
}
/* Boolean/any -> coerce boolean to number and try again. If boolean is
* compared to a pointer, the final comparison after coercion now always
* yields false (as pointer vs. number compares to false), but this is
* not special cased.
*/
if (DUK_TVAL_IS_BOOLEAN(tv_x)) {
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if (DUK_TVAL_IS_BOOLEAN(tv_y)) {
/* ToNumber(bool) is +1.0 or 0.0. Tagged boolean value is always 0 or 1. */
duk_bool_t rc;
DUK_ASSERT(DUK_TVAL_GET_BOOLEAN(tv_y) == 0 || DUK_TVAL_GET_BOOLEAN(tv_y) == 1);
duk_push_tval(ctx, tv_x);
duk_push_int(ctx, DUK_TVAL_GET_BOOLEAN(tv_y));
rc = duk_js_equals_helper(thr, duk_get_tval(ctx, -2), duk_get_tval(ctx, -1), 0 /*flags:nonstrict*/);
duk_pop_2(ctx);
return rc;
}
/* String-number-buffer/object -> coerce object to primitive (apparently without hint), then try again. */
if ((DUK_TVAL_IS_STRING(tv_x) || DUK_TVAL_IS_NUMBER(tv_x) || DUK_TVAL_IS_BUFFER(tv_x)) &&
DUK_TVAL_IS_OBJECT(tv_y)) {
tv_tmp = tv_x;
tv_x = tv_y;
tv_y = tv_tmp;
}
if (DUK_TVAL_IS_OBJECT(tv_x) &&
(DUK_TVAL_IS_STRING(tv_y) || DUK_TVAL_IS_NUMBER(tv_y) || DUK_TVAL_IS_BUFFER(tv_y))) {
duk_bool_t rc;
duk_push_tval(ctx, tv_x);
duk_push_tval(ctx, tv_y);
duk_to_primitive(ctx, -2, DUK_HINT_NONE); /* apparently no hint? */
rc = duk_js_equals_helper(thr, duk_get_tval(ctx, -2), duk_get_tval(ctx, -1), 0 /*flags:nonstrict*/);
duk_pop_2(ctx);
return rc;
}
/* Nothing worked -> not equal. */
return 0;
}
DUK_LOCAL void duk__print_tval(duk__dprint_state *st, duk_tval *tv) {
duk_fixedbuffer *fb = st->fb;
if (duk_fb_is_full(fb)) {
return;
}
/* depth check is done when printing an actual type */
if (st->heavy) {
duk_fb_sprintf(fb, "(%p)", (void *) tv);
}
if (!tv) {
duk_fb_put_cstring(fb, "NULL");
return;
}
if (st->binary) {
duk_size_t i;
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LBRACKET);
for (i = 0; i < (duk_size_t) sizeof(*tv); i++) {
duk_fb_sprintf(fb, "%02lx", (unsigned long) ((duk_uint8_t *)tv)[i]);
}
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RBRACKET);
}
if (st->heavy) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_LANGLE);
}
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
duk_fb_put_cstring(fb, "undefined");
break;
}
case DUK_TAG_UNUSED: {
duk_fb_put_cstring(fb, "unused");
break;
}
case DUK_TAG_NULL: {
duk_fb_put_cstring(fb, "null");
break;
}
case DUK_TAG_BOOLEAN: {
duk_fb_put_cstring(fb, DUK_TVAL_GET_BOOLEAN(tv) ? "true" : "false");
break;
}
case DUK_TAG_STRING: {
/* Note: string is a terminal heap object, so no depth check here */
duk__print_hstring(st, DUK_TVAL_GET_STRING(tv), 1);
break;
}
case DUK_TAG_OBJECT: {
duk__print_hobject(st, DUK_TVAL_GET_OBJECT(tv));
break;
}
case DUK_TAG_BUFFER: {
duk__print_hbuffer(st, DUK_TVAL_GET_BUFFER(tv));
break;
}
case DUK_TAG_POINTER: {
duk_fb_sprintf(fb, "pointer:%p", (void *) DUK_TVAL_GET_POINTER(tv));
break;
}
case DUK_TAG_LIGHTFUNC: {
duk_c_function func;
duk_small_uint_t lf_flags;
DUK_TVAL_GET_LIGHTFUNC(tv, func, lf_flags);
duk_fb_sprintf(fb, "lightfunc:");
duk_fb_put_funcptr(fb, (duk_uint8_t *) &func, sizeof(func));
duk_fb_sprintf(fb, ":%04lx", (long) lf_flags);
break;
}
#if defined(DUK_USE_FASTINT)
case DUK_TAG_FASTINT:
#endif
default: {
/* IEEE double is approximately 16 decimal digits; print a couple extra */
DUK_ASSERT(!DUK_TVAL_IS_UNUSED(tv));
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
duk_fb_sprintf(fb, "%.18g", (double) DUK_TVAL_GET_NUMBER(tv));
break;
}
}
if (st->heavy) {
duk_fb_put_byte(fb, (duk_uint8_t) DUK_ASC_RANGLE);
}
}
duk_double_t duk_js_tonumber(duk_hthread *thr, duk_tval *tv) {
duk_context *ctx = (duk_hthread *) thr;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(tv != NULL);
switch (DUK_TVAL_GET_TAG(tv)) {
case DUK_TAG_UNDEFINED: {
/* return a specific NaN (although not strictly necessary) */
duk_double_union du;
DUK_DBLUNION_SET_NAN(&du);
DUK_ASSERT(DUK_DBLUNION_IS_NORMALIZED(&du));
return du.d;
}
case DUK_TAG_NULL: {
/* +0.0 */
return 0.0;
}
case DUK_TAG_BOOLEAN: {
if (DUK_TVAL_IS_BOOLEAN_TRUE(tv)) {
return 1.0;
}
return 0.0;
}
case DUK_TAG_STRING: {
duk_hstring *h = DUK_TVAL_GET_STRING(tv);
duk_push_hstring(ctx, h);
return duk__tonumber_string_raw(thr);
}
case DUK_TAG_OBJECT: {
/* Note: ToPrimitive(object,hint) == [[DefaultValue]](object,hint),
* so use [[DefaultValue]] directly.
*/
duk_double_t d;
duk_push_tval(ctx, tv);
duk_to_defaultvalue(ctx, -1, DUK_HINT_NUMBER); /* 'tv' becomes invalid */
/* recursive call for a primitive value (guaranteed not to cause second
* recursion).
*/
d = duk_js_tonumber(thr, duk_require_tval(ctx, -1));
duk_pop(ctx);
return d;
}
case DUK_TAG_BUFFER: {
/* Coerce like a string. This makes sense because addition also treats
* buffers like strings.
*/
duk_hbuffer *h = DUK_TVAL_GET_BUFFER(tv);
duk_push_hbuffer(ctx, h);
duk_to_string(ctx, -1); /* XXX: expensive, but numconv now expects to see a string */
return duk__tonumber_string_raw(thr);
}
case DUK_TAG_POINTER: {
/* Coerce like boolean. This allows code to do something like:
*
* if (ptr) { ... }
*/
void *p = DUK_TVAL_GET_POINTER(tv);
return (p != NULL ? 1.0 : 0.0);
}
default: {
/* number */
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
return DUK_TVAL_GET_NUMBER(tv);
}
}
DUK_UNREACHABLE();
}
static duk_uint8_t *duk__dump_func(duk_context *ctx, duk_hcompiledfunction *func, duk_bufwriter_ctx *bw_ctx, duk_uint8_t *p) {
duk_hthread *thr;
duk_tval *tv, *tv_end;
duk_instr_t *ins, *ins_end;
duk_hobject **fn, **fn_end;
duk_hstring *h_str;
duk_uint32_t count_instr;
duk_uint32_t tmp32;
duk_uint16_t tmp16;
duk_double_t d;
thr = (duk_hthread *) ctx;
DUK_UNREF(ctx);
DUK_UNREF(thr);
DUK_DD(DUK_DDPRINT("dumping function %p to %p: "
"consts=[%p,%p[ (%ld bytes, %ld items), "
"funcs=[%p,%p[ (%ld bytes, %ld items), "
"code=[%p,%p[ (%ld bytes, %ld items)",
(void *) func,
(void *) p,
(void *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CONSTS_SIZE(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_FUNCS_SIZE(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, func),
(void *) DUK_HCOMPILEDFUNCTION_GET_CODE_END(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CODE_SIZE(thr->heap, func),
(long) DUK_HCOMPILEDFUNCTION_GET_CODE_COUNT(thr->heap, func)));
DUK_ASSERT(DUK_USE_ESBC_MAX_BYTES <= 0x7fffffffUL); /* ensures no overflow */
count_instr = (duk_uint32_t) DUK_HCOMPILEDFUNCTION_GET_CODE_COUNT(thr->heap, func);
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 3 * 4 + 2 * 2 + 3 * 4 + count_instr * 4, p);
/* Fixed header info. */
tmp32 = count_instr;
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp32 = (duk_uint32_t) DUK_HCOMPILEDFUNCTION_GET_CONSTS_COUNT(thr->heap, func);
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp32 = (duk_uint32_t) DUK_HCOMPILEDFUNCTION_GET_FUNCS_COUNT(thr->heap, func);
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp16 = func->nregs;
DUK_RAW_WRITE_U16_BE(p, tmp16);
tmp16 = func->nargs;
DUK_RAW_WRITE_U16_BE(p, tmp16);
#if defined(DUK_USE_DEBUGGER_SUPPORT)
tmp32 = func->start_line;
DUK_RAW_WRITE_U32_BE(p, tmp32);
tmp32 = func->end_line;
DUK_RAW_WRITE_U32_BE(p, tmp32);
#else
DUK_RAW_WRITE_U32_BE(p, 0);
DUK_RAW_WRITE_U32_BE(p, 0);
#endif
tmp32 = ((duk_heaphdr *) func)->h_flags & DUK_HEAPHDR_FLAGS_FLAG_MASK;
DUK_RAW_WRITE_U32_BE(p, tmp32);
/* Bytecode instructions: endian conversion needed unless
* platform is big endian.
*/
ins = DUK_HCOMPILEDFUNCTION_GET_CODE_BASE(thr->heap, func);
ins_end = DUK_HCOMPILEDFUNCTION_GET_CODE_END(thr->heap, func);
DUK_ASSERT((duk_size_t) (ins_end - ins) == (duk_size_t) count_instr);
#if defined(DUK_USE_INTEGER_BE)
DUK_MEMCPY((void *) p, (const void *) ins, (size_t) (ins_end - ins));
p += (size_t) (ins_end - ins);
#else
while (ins != ins_end) {
tmp32 = (duk_uint32_t) (*ins);
DUK_RAW_WRITE_U32_BE(p, tmp32);
ins++;
}
#endif
/* Constants: variable size encoding. */
tv = DUK_HCOMPILEDFUNCTION_GET_CONSTS_BASE(thr->heap, func);
tv_end = DUK_HCOMPILEDFUNCTION_GET_CONSTS_END(thr->heap, func);
while (tv != tv_end) {
/* constants are strings or numbers now */
DUK_ASSERT(DUK_TVAL_IS_STRING(tv) ||
DUK_TVAL_IS_NUMBER(tv));
if (DUK_TVAL_IS_STRING(tv)) {
h_str = DUK_TVAL_GET_STRING(tv);
DUK_ASSERT(h_str != NULL);
DUK_ASSERT(DUK_HSTRING_MAX_BYTELEN <= 0x7fffffffUL); /* ensures no overflow */
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 1 + 4 + DUK_HSTRING_GET_BYTELEN(h_str), p),
*p++ = DUK__SER_STRING;
p = duk__dump_hstring_raw(p, h_str);
} else {
DUK_ASSERT(DUK_TVAL_IS_NUMBER(tv));
p = DUK_BW_ENSURE_RAW(thr, bw_ctx, 1 + 8, p);
*p++ = DUK__SER_NUMBER;
d = DUK_TVAL_GET_NUMBER(tv);
DUK_RAW_WRITE_DOUBLE_BE(p, d);
}
tv++;
}
/* Inner functions recursively. */
fn = (duk_hobject **) DUK_HCOMPILEDFUNCTION_GET_FUNCS_BASE(thr->heap, func);
fn_end = (duk_hobject **) DUK_HCOMPILEDFUNCTION_GET_FUNCS_END(thr->heap, func);
while (fn != fn_end) {
/* XXX: This causes recursion up to inner function depth
* which is normally not an issue, e.g. mark-and-sweep uses
* a recursion limiter to avoid C stack issues. Avoiding
* this would mean some sort of a work list or just refusing
* to serialize deep functions.
*/
DUK_ASSERT(DUK_HOBJECT_IS_COMPILEDFUNCTION(*fn));
p = duk__dump_func(ctx, (duk_hcompiledfunction *) *fn, bw_ctx, p);
fn++;
}
/* Object extra properties.
*
* There are some difference between function templates and functions.
* For example, function templates don't have .length and nargs is
* normally used to instantiate the functions.
*/
p = duk__dump_uint32_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_LENGTH, (duk_uint32_t) func->nargs);
p = duk__dump_string_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_NAME);
p = duk__dump_string_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_FILE_NAME);
p = duk__dump_buffer_prop(thr, p, bw_ctx, (duk_hobject *) func, DUK_STRIDX_INT_PC2LINE);
p = duk__dump_varmap(thr, p, bw_ctx, (duk_hobject *) func);
p = duk__dump_formals(thr, p, bw_ctx, (duk_hobject *) func);
DUK_DD(DUK_DDPRINT("serialized function %p -> final pointer %p", (void *) func, (void *) p));
return p;
}
