X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=ion_private.h;h=809f8532618933d371cdeab49e131cf9f52c280c;hb=59145a019faf6d4c60cdbbd965c9377e48d59cf8;hp=0192e14ba528691e7154004bdeb2202abfe808a1;hpb=14a010b784f6228a293c90502c46a7143d89afbf;p=awesomized%2Fext-ion

diff --git a/ion_private.h b/ion_private.h
index 0192e14..809f853 100644
--- a/ion_private.h
+++ b/ion_private.h
@@ -15,22 +15,55 @@
 #include "php.h"
 #include "ext/date/php_date.h"
 
-typedef struct php_ion_global_serializer php_ion_global_serializer;
-typedef struct php_ion_global_unserializer php_ion_global_unserializer;
+typedef struct php_ion_serializer {
+	ION_WRITER *writer;
+	ION_WRITER_OPTIONS *options;
+	smart_str *buffer;
+
+	zend_string *call_custom;
+	zend_bool call_magic;
+	zend_bool multi_seq;
+
+	uint32_t level;
+	HashTable *ids;
+	HashTable *tmp;
+} php_ion_serializer;
+
+typedef struct php_ion_annotaions {
+	uint8_t backref:1;
+	uint8_t makeref:1;
+	uint8_t object_prop:1;
+	uint8_t object_type;
+	zend_string *object_class;
+	zend_string *property_class;
+} php_ion_annotations;
+
+typedef struct php_ion_unserializer {
+	ION_READER *reader;
+	ION_READER_OPTIONS *options;
+	ION_TYPE type;
+
+	zend_string *call_custom;
+	zend_bool call_magic;
+	zend_bool multi_seq;
+
+	uint32_t level;
+	HashTable *ids;
+	HashTable *tmp;
+	HashTable *addref;
+
+	php_ion_annotations annotations;
+} php_ion_unserializer;
 
 ZEND_BEGIN_MODULE_GLOBALS(ion)
 
-	struct php_ion_global_serializer {
-		HashTable ids;
-		HashTable tmp;
-		uint64_t level;
-	} serializer;
+	php_ion_serializer serializer;
+	php_ion_unserializer unserializer;
 
-	struct php_ion_global_unserializer {
-		HashTable ids;
-		HashTable tmp;
-		uint64_t level;
-	} unserializer;
+	struct {
+		HashTable serializer[2];
+		HashTable unserializer[3];
+	} _ht;
 
 ZEND_END_MODULE_GLOBALS(ion);
 
@@ -44,76 +77,93 @@ ZEND_DECLARE_MODULE_GLOBALS(ion);
 
 static inline void php_ion_globals_serializer_init(void)
 {
-	php_ion_global_serializer *s = &php_ion_globals.serializer;
+	php_ion_serializer *s = &php_ion_globals.serializer;
+	HashTable *h = php_ion_globals._ht.serializer;
 
-	zend_hash_init(&s->tmp, 0, NULL, ZVAL_PTR_DTOR, 0);
-	zend_hash_init(&s->ids, 0, NULL, NULL, 0);
+	zend_hash_init(s->tmp = &h[0], 0, NULL, ZVAL_PTR_DTOR, 0);
+	zend_hash_init(s->ids = &h[1], 0, NULL, NULL, 0);
 }
 
-static inline void php_ion_globals_serializer_step(void)
+static inline uint32_t php_ion_globals_serializer_step(void)
 {
-	php_ion_global_serializer *s = &php_ion_globals.serializer;
+	php_ion_serializer *s = &php_ion_globals.serializer;
+	uint32_t level;
 
-	if (!s->level++) {
-		zend_hash_clean(&s->ids);
-		zend_hash_clean(&s->tmp);
+	if (!(level = s->level++)) {
+		zend_hash_clean(s->ids);
+		zend_hash_clean(s->tmp);
 	}
+	return level;
 }
 
-static inline void php_ion_globals_serializer_exit(void)
+static inline uint32_t php_ion_globals_serializer_exit(void)
 {
-	php_ion_global_serializer *s = &php_ion_globals.serializer;
+	php_ion_serializer *s = &php_ion_globals.serializer;
 
 	ZEND_ASSERT(s->level);
 	if (!--s->level) {
-		zend_hash_clean(&s->ids);
-		zend_hash_clean(&s->tmp);
+		zend_hash_clean(s->ids);
+		zend_hash_clean(s->tmp);
 	}
+	return s->level;
 }
 
 static inline void php_ion_globals_serializer_dtor(void)
 {
-	php_ion_global_serializer *s = &php_ion_globals.serializer;
+	php_ion_serializer *s = &php_ion_globals.serializer;
 
-	zend_hash_destroy(&s->tmp);
-	zend_hash_destroy(&s->ids);
+	zend_hash_destroy(s->tmp);
+	zend_hash_destroy(s->ids);
 }
 
+void ZVAL_ADDREF(zval *zv)
+{
+	if (Z_ISREF_P(zv)) {
+		Z_TRY_ADDREF_P(Z_REFVAL_P(zv));
+	} else {
+		Z_TRY_ADDREF_P(zv);
+	}
+}
 static inline void php_ion_globals_unserializer_init(void)
 {
-	php_ion_global_unserializer *s = &php_ion_globals.unserializer;
+	php_ion_unserializer *s = &php_ion_globals.unserializer;
+	HashTable *h = php_ion_globals._ht.unserializer;
 
-	zend_hash_init(&s->tmp, 0, NULL, ZVAL_PTR_DTOR, 0);
-	zend_hash_init(&s->ids, 0, NULL, NULL, 0);
+	zend_hash_init(s->tmp = &h[0], 0, NULL, ZVAL_PTR_DTOR, 0);
+	zend_hash_init(s->ids = &h[1], 0, NULL, NULL, 0);
+	zend_hash_init(s->addref = &h[2], 0, NULL, ZVAL_ADDREF, 0);
 }
 
 static inline void php_ion_globals_unserializer_step(void)
 {
-	php_ion_global_unserializer *s = &php_ion_globals.unserializer;
+	php_ion_unserializer *s = &php_ion_globals.unserializer;
 
 	if (!s->level++) {
-		zend_hash_clean(&s->ids);
-		zend_hash_clean(&s->tmp);
+		zend_hash_clean(s->addref);
+		zend_hash_clean(s->ids);
+		zend_hash_clean(s->tmp);
 	}
 }
 
 static inline void php_ion_globals_unserializer_exit(void)
 {
-	php_ion_global_unserializer *s = &php_ion_globals.unserializer;
+	php_ion_unserializer *s = &php_ion_globals.unserializer;
 
 	ZEND_ASSERT(s->level);
 	if (!--s->level) {
-		zend_hash_clean(&s->ids);
-		zend_hash_clean(&s->tmp);
+		zend_hash_clean(s->addref);
+		zend_hash_clean(s->ids);
+		zend_hash_clean(s->tmp);
 	}
 }
 
 static inline void php_ion_globals_unserializer_dtor(void)
 {
-	php_ion_global_unserializer *s = &php_ion_globals.unserializer;
+	php_ion_unserializer *s = &php_ion_globals.unserializer;
 
-	zend_hash_destroy(&s->tmp);
-	zend_hash_destroy(&s->ids);
+	zend_hash_destroy(s->addref);
+	zend_hash_destroy(s->ids);
+	zend_hash_destroy(s->tmp);
 }
 
 static zend_class_entry
@@ -122,8 +172,8 @@ static zend_class_entry
 	*ce_Collection,
 	*ce_Decimal,
 	*ce_Decimal_Context,
-	*ce_PHP_Serializer,
-	*ce_PHP_Unserializer,
+	*ce_Decimal_Context_Rounding,
+	*ce_LOB,
 	*ce_Reader,
 	*ce_Reader_Options,
 	*ce_Reader_Reader,
@@ -131,13 +181,18 @@ static zend_class_entry
 	*ce_Reader_Stream,
 	*ce_Reader_Buffer_Reader,
 	*ce_Reader_Stream_Reader,
+	*ce_Serializer,
+	*ce_Serializer_PHP,
 	*ce_Symbol,
 	*ce_Symbol_ImportLocation,
 	*ce_Symbol_System,
 	*ce_Symbol_System_SID,
 	*ce_Symbol_Table,
 	*ce_Timestamp,
+	*ce_Timestamp_Precision,
 	*ce_Type,
+	*ce_Unserializer,
+	*ce_Unserializer_PHP,
 	*ce_Writer,
 	*ce_Writer_Options,
 	*ce_Writer_Buffer,
@@ -146,44 +201,31 @@ static zend_class_entry
 	*ce_Writer_Stream_Writer,
 	*ce_Writer_Writer
 	;
-static zend_object_handlers
-	oh_catalog,
-	oh_decimal,
-	oh_decimal_ctx,
-	oh_reader_options,
-	oh_reader,
-	oh_symbol,
-	oh_symbol_iloc,
-	oh_symbol_table,
-	oh_timestamp,
-	oh_type,
-	oh_writer_options,
-	oh_writer
-	;
 
-#define php_ion_decl(type, name, ...) \
-	static zend_object *create_ion_ ## name(zend_class_entry *ce) \
+#define php_ion_decl(type, cname, ...) \
+	static zend_object_handlers oh_ ## cname; \
+	static inline zend_object *create_ion_ ## cname(zend_class_entry *ce) \
 	{ \
-		if (!ce) ce = ce_ ## name; \
+		if (!ce) ce = ce_ ## cname; \
 		php_ion_ ## type *o = ecalloc(1, sizeof(*o) + zend_object_properties_size(ce)); \
 		zend_object_std_init(&o->std, ce); \
 		object_properties_init(&o->std, ce); \
-		o->std.handlers = &oh_ ## type; \
+		o->std.handlers = &oh_ ## cname; \
 		return &o->std; \
 	} \
-	static void free_ion_ ## name(zend_object *std) \
+	static inline void free_ion_ ## cname(zend_object *std) \
 	{ \
 		php_ion_ ## type *obj = php_ion_obj(type, std); \
 		__VA_ARGS__; \
 		zend_object_std_dtor(std); \
 		(void) obj; \
 	}
-#define php_ion_register(type, name, ...) do { \
-	ce_ ## name = register_class_ion_ ## name(__VA_ARGS__); \
-	ce_ ## name ->create_object = create_ion_ ## name; \
-	memcpy(&oh_ ## type, zend_get_std_object_handlers(), sizeof(zend_object_handlers)); \
-	oh_ ## type .offset = offsetof(php_ion_ ## type, std); \
-	oh_ ## type .free_obj = free_ion_ ## name; \
+#define php_ion_register(type, cname, ...) do { \
+	ce_ ## cname = register_class_ion_ ## cname(__VA_ARGS__); \
+	ce_ ## cname ->create_object = create_ion_ ## cname; \
+	memcpy(&oh_ ## cname, zend_get_std_object_handlers(), sizeof(zend_object_handlers)); \
+	oh_ ## cname .offset = offsetof(php_ion_ ## type, std); \
+	oh_ ## cname .free_obj = free_ion_ ## cname; \
 } while (0)
 
 #define php_ion_obj(type, obj) \
@@ -218,17 +260,10 @@ static zend_object_handlers
 	PTR_CHECK(*((void **)obj)); \
 } while (0)
 
-static inline ION_STRING *ion_string_from_cstr(ION_STRING *is, const char *s, size_t l)
-{
-	is->length = l;
-	is->value = (BYTE *) s;
-	return is;
-}
-
 static inline ION_STRING *ion_string_from_zend(ION_STRING *is, const zend_string *zs)
 {
-	is->length = ZSTR_LEN(zs);
-	is->value = (BYTE *) ZSTR_VAL(zs);
+	is->length = zs ? zs->len : 0;
+	is->value = (BYTE *) (zs ? zs->val : NULL);
 	return is;
 }
 
@@ -249,6 +284,8 @@ typedef struct php_ion_type {
 	zend_object std;
 } php_ion_type;
 
+php_ion_decl(type, Type);
+
 #define RETURN_IONTYPE(typ) do { \
 	zend_object *__zo = php_ion_type_fetch(typ); \
 	if (UNEXPECTED(!__zo)) { \
@@ -287,17 +324,44 @@ static inline void php_ion_symbol_iloc_dtor(php_ion_symbol_iloc *obj)
 	zend_string_release(obj->name);
 }
 
+php_ion_decl(symbol_iloc, Symbol_ImportLocation, php_ion_symbol_iloc_dtor(obj));
+
 typedef struct php_ion_symbol {
 	ION_SYMBOL sym;
 	zend_string *value;
 	zend_object *iloc, std;
 } php_ion_symbol;
 
+static inline int php_ion_symbol_zval_compare(zval *zv1, zval *zv2) {
+	zend_string *zs1 = zval_get_string(zv1);
+	zend_string *zs2 = zval_get_string(zv2);
+
+	if (EG(exception)) {
+		return 0;
+	}
+
+	int result;
+	if (zs1->len > zs2->len) {
+		result = 1;
+	} else if (zs2->len > zs1->len) {
+		result = -1;
+	} else {
+		result = memcmp(zs1->val, zs2->val, zs1->len);
+	}
+	zend_string_release(zs1);
+	zend_string_release(zs2);
+	return result;
+}
+
 static inline void php_ion_symbol_ctor(php_ion_symbol *obj)
 {
 	zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("sid"),
 		obj->sym.sid);
-	zend_update_property_str(obj->std.ce, &obj->std, ZEND_STRL("value"), obj->value);
+	if (obj->value) {
+		zend_update_property_str(obj->std.ce, &obj->std, ZEND_STRL("value"), obj->value);
+	} else{
+		zend_update_property_null(obj->std.ce, &obj->std, ZEND_STRL("value"));
+	}
 	ion_string_from_zend(&obj->sym.value, obj->value);
 	if (obj->iloc) {
 		update_property_obj(&obj->std, ZEND_STRL("importLocation"), obj->iloc);
@@ -309,7 +373,9 @@ static inline void php_ion_symbol_ctor(php_ion_symbol *obj)
 
 static inline void php_ion_symbol_dtor(php_ion_symbol *obj)
 {
-	zend_string_release(obj->value);
+	if (obj->value) {
+		zend_string_release(obj->value);
+	}
 }
 
 static inline void php_ion_symbol_zval(ION_SYMBOL *sym_ptr, zval *return_value)
@@ -332,36 +398,80 @@ static inline void php_ion_symbol_zval(ION_SYMBOL *sym_ptr, zval *return_value)
 	}
 
 	php_ion_symbol_ctor(sym);
+
+	if (!ION_SYMBOL_IMPORT_LOCATION_IS_NULL(sym_ptr)) {
+		GC_DELREF(sym->iloc);
+	}
 }
 
+php_ion_decl(symbol, Symbol, php_ion_symbol_dtor(obj));
+
 typedef struct php_ion_symbol_table {
 	zend_object std;
 } php_ion_symbol_table;
 
+php_ion_decl(symbol_table, Symbol_Table);
+
 typedef struct php_ion_decimal_ctx {
 	decContext ctx;
 	zend_object std;
 } php_ion_decimal_ctx;
 
+#define php_ion_decimal_ctx_init_max(c, rounding) \
+	php_ion_decimal_ctx_init((c), DEC_MAX_DIGITS, DEC_MAX_EMAX, DEC_MIN_EMIN, (rounding), false)
+static inline void php_ion_decimal_ctx_init(decContext *ctx,
+		zend_long digits, zend_long emax, zend_long emin, zend_long round, zend_bool clamp)
+{
+	memset(ctx, 0, sizeof(*ctx));
+	ctx->digits = digits;
+	ctx->emax = emax;
+	ctx->emin = emin;
+	ctx->round = round;
+	ctx->clamp = clamp;
+}
+
+static inline void php_ion_decimal_ctx_ctor(php_ion_decimal_ctx *obj, zend_object *o_round)
+{
+	if (!obj->ctx.digits) {
+		php_ion_decimal_ctx_init_max(&obj->ctx, DEC_ROUND_HALF_EVEN);
+	}
+	if (o_round) {
+		update_property_obj(&obj->std, ZEND_STRL("round"), o_round);
+	} else {
+		zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("round"), obj->ctx.round);
+	}
+	zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("digits"), obj->ctx.digits);
+	zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("eMax"), obj->ctx.emax);
+	zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("eMin"), obj->ctx.emin);
+	zend_update_property_bool(obj->std.ce, &obj->std, ZEND_STRL("clamp"), obj->ctx.clamp);
+}
+
+php_ion_decl(decimal_ctx, Decimal_Context);
+
 typedef struct php_ion_decimal {
 	ION_DECIMAL dec;
 	zend_object *ctx, std;
 } php_ion_decimal;
 
-static inline void php_ion_decimal_ctor(php_ion_decimal *obj)
+static inline void php_ion_decimal_from_zend_long(ION_DECIMAL *dec, decContext *ctx, zend_long num)
 {
-	if (obj->ctx) {
-		update_property_obj(&obj->std, ZEND_STRL("context"), obj->ctx);
+	if (num <= INT32_MAX && num >= INT32_MIN) {
+		ION_CHECK(ion_decimal_from_int32(dec, num));
+	} else if (num > 0 && num <= UINT32_MAX) {
+		ION_CHECK(ion_decimal_from_uint32(dec, num));
 	} else {
-		zend_update_property_null(obj->std.ce, &obj->std, ZEND_STRL("context"));
+		ION_INT *iint;
+		ION_CHECK(ion_int_alloc(NULL, &iint));
+		ION_CHECK(ion_int_from_long(iint, num),
+				ion_int_free(iint));
+		/* WATCH OUT: BS API */
+		dec->type = ION_DECIMAL_TYPE_QUAD;
+		ION_CHECK(ion_decimal_from_ion_int(dec, ctx, iint),
+				ion_int_free(iint));
+		ion_int_free(iint);
 	}
 }
 
-static inline void php_ion_decimal_dtor(php_ion_decimal *obj)
-{
-	ion_decimal_free(&obj->dec);
-}
-
 static inline zend_string *php_ion_decimal_to_string(ION_DECIMAL *dec)
 {
 	zend_string *zstr = zend_string_alloc(ION_DECIMAL_STRLEN(dec), 0);
@@ -369,44 +479,69 @@ static inline zend_string *php_ion_decimal_to_string(ION_DECIMAL *dec)
 	return zend_string_truncate(zstr, strlen(zstr->val), 0);
 }
 
-static zend_array *php_ion_decimal_get_props_for(zend_object *object, zend_prop_purpose purpose)
+static inline void php_ion_decimal_to_zend_long(ION_DECIMAL *dec, decContext *ctx, zend_long *l)
 {
-	php_ion_decimal *obj = php_ion_obj(decimal, object);
+	ION_INT *ii = NULL;
+	ION_CHECK(ion_int_alloc(NULL, &ii));
+	ION_CHECK(ion_decimal_to_ion_int(dec, ctx, ii), ion_int_free(ii));
+	int64_t i64;
+	ION_CHECK(ion_int_to_int64(ii, &i64), ion_int_free(ii));
+	*l = i64;
+	ion_int_free(ii);
+}
 
-	switch (purpose) {
-		case ZEND_PROP_PURPOSE_DEBUG:
-			zend_array *arr = zend_new_array(1);
-			zval *zv = zend_hash_str_add_empty_element(arr, ZEND_STRL("value"));
-			ZVAL_STR(zv, php_ion_decimal_to_string(&obj->dec));
-			return arr;
+static inline bool php_ion_decimal_fits_zend_long(php_ion_decimal *obj)
+{
+	int32_t result;
 
-		default:
-			return zend_std_get_properties_for(object, purpose);
+	if (!ion_decimal_is_integer(&obj->dec)) {
+		return false;
 	}
-}
 
-typedef php_date_obj php_ion_timestamp;
+	result  = 1;
+	ion_decimal_compare(&obj->dec, &g_ion_dec_zend_max, &g_dec_ctx, &result);
+	if (result == 1) {
+		return false;
+	}
+	result = -1;
+	ion_decimal_compare(&obj->dec, &g_ion_dec_zend_min, &g_dec_ctx, &result);
+	if (result == -1) {
+		return false;
+	}
+	return true;
+}
 
-static inline void php_ion_timestamp_ctor(php_ion_timestamp *obj, zend_long precision, zend_string *fmt, zend_string *dt, zval *tz)
+static inline void php_ion_decimal_ctor(php_ion_decimal *obj)
 {
-	if (!obj->time) {
-		php_date_initialize(obj, dt ? dt->val : "now", dt ? dt->len : 3, fmt ? fmt->val : NULL, tz, PHP_DATE_INIT_CTOR);
+	if (!obj->ctx) {
+		zval zdc;
+		object_init_ex(&zdc, ce_Decimal_Context);
+		obj->ctx = Z_OBJ(zdc);
+		php_ion_decimal_ctx_ctor(php_ion_obj(decimal_ctx, obj->ctx), NULL);
+		GC_DELREF(obj->ctx);
 	}
-	zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("precision"), precision);
-	if (fmt) {
-		zend_update_property_str(obj->std.ce, &obj->std, ZEND_STRL("format"), fmt);
+	update_property_obj(&obj->std, ZEND_STRL("context"), obj->ctx);
+
+	if (php_ion_decimal_fits_zend_long(obj)) {
+		zend_long l;
+		php_ion_decimal_to_zend_long(&obj->dec, &php_ion_obj(decimal_ctx, obj->ctx)->ctx, &l);
+		zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("number"), l);
 	} else {
-		zend_update_property_stringl(obj->std.ce, &obj->std, ZEND_STRL("format"), ZEND_STRL("c"));
+		zend_string *zstr = php_ion_decimal_to_string(&obj->dec);
+		zend_update_property_str(obj->std.ce, &obj->std, ZEND_STRL("number"), zstr);
+		zend_string_release(zstr);
 	}
 }
 
-static inline void php_ion_timestamp_dtor(php_ion_timestamp *obj)
+static inline void php_ion_decimal_dtor(php_ion_decimal *obj)
 {
-	if (obj->time) {
-		timelib_time_dtor(obj->time);
-	}
+	ion_decimal_free(&obj->dec);
 }
 
+php_ion_decl(decimal, Decimal, php_ion_decimal_dtor(obj));
+
+typedef php_date_obj php_ion_timestamp;
+
 static inline zend_long php_usec_from_ion(const decQuad *frac, decContext *ctx)
 {
 	decQuad microsecs, result;
@@ -420,6 +555,26 @@ static inline decQuad *ion_ts_frac_from_usec(decQuad *frac, zend_long usec, decC
  	return decQuadDivide(frac, decQuadFromInt32(&us, usec), decQuadFromInt32(&microsecs, 1000000), ctx);
 }
 
+static inline zend_string *php_dt_format_from_precision(uint8_t precision)
+{
+	switch (precision) {
+	case ION_TS_FRAC:
+		return zend_string_init(ZEND_STRL("c"), 0);
+	case ION_TS_SEC:
+		return zend_string_init(ZEND_STRL("Y-m-d\\TH:i:sP"), 0);
+	case ION_TS_MIN:
+		return zend_string_init(ZEND_STRL("Y-m-d\\TH:iP"), 0);
+	case ION_TS_DAY:
+		return zend_string_init(ZEND_STRL("Y-m-d\\T"), 0);
+	case ION_TS_MONTH:
+		return zend_string_init(ZEND_STRL("Y-m\\T"), 0);
+	case ION_TS_YEAR:
+		return zend_string_init(ZEND_STRL("Y\\T"), 0);
+	default:
+		return zend_string_init(ZEND_STRL("c"), 0);
+	}
+}
+
 static inline timelib_time* php_time_from_ion(const ION_TIMESTAMP *ts, decContext *ctx, zend_string **fmt)
 {
 	timelib_time *time = timelib_time_ctor();
@@ -427,34 +582,30 @@ static inline timelib_time* php_time_from_ion(const ION_TIMESTAMP *ts, decContex
 	switch (ts->precision) {
 	case ION_TS_FRAC:
 		time->us = php_usec_from_ion(&ts->fraction, ctx);
-		if (fmt) *fmt = zend_string_init(ZEND_STRL("c"), 0);
 		/* fallthrough */
 	case ION_TS_SEC:
 		time->s = ts->seconds;
-		if (fmt && !*fmt) *fmt = zend_string_init(ZEND_STRL("Y-m-d\\TH:i:sP"), 0);
 		/* fallthrough */
 	case ION_TS_MIN:
 		time->i = ts->minutes;
 		time->h = ts->hours;
-		if (fmt && !*fmt) *fmt = zend_string_init(ZEND_STRL("Y-m-d\\TH:iP"), 0);
 		/* fallthrough */
 	case ION_TS_DAY:
 		time->d = ts->day;
-		if (fmt && !*fmt) *fmt = zend_string_init(ZEND_STRL("Y-m-d\\T"), 0);
 		/* fallthrough */
 	case ION_TS_MONTH:
 		time->m = ts->month;
-		if (fmt && !*fmt) *fmt = zend_string_init(ZEND_STRL("Y-m\\T"), 0);
 		/* fallthrough */
 	case ION_TS_YEAR:
 		time->y = ts->year;
-		if (fmt && !*fmt) *fmt = zend_string_init(ZEND_STRL("Y\\T"), 0);
 		/* fallthrough */
 	default:
-		if (fmt && !*fmt) *fmt = zend_string_init(ZEND_STRL("c"), 0);
 		time->z = ts->tz_offset * 60;
 	}
 
+	if (fmt) {
+		*fmt = php_dt_format_from_precision(ts->precision);
+	}
 	return time;
 }
 
@@ -495,16 +646,41 @@ static inline ION_TIMESTAMP *ion_timestamp_from_php(ION_TIMESTAMP *buf, php_ion_
 	return buf;
 }
 
+static inline void php_ion_timestamp_ctor(php_ion_timestamp *obj, zend_long precision, zend_string *fmt, zend_string *dt, zval *tz)
+{
+	if (!obj->time) {
+		php_date_initialize(obj, dt ? dt->val : "", dt ? dt->len : 0, fmt ? fmt->val : NULL, tz, PHP_DATE_INIT_CTOR);
+	}
+	zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("precision"), precision);
+
+	fmt = php_dt_format_from_precision(precision);
+	zend_update_property_str(obj->std.ce, &obj->std, ZEND_STRL("format"), fmt);
+	zend_string_release(fmt);
+}
+
+static inline void php_ion_timestamp_dtor(php_ion_timestamp *obj)
+{
+	if (obj->time) {
+		timelib_time_dtor(obj->time);
+	}
+}
+
+php_ion_decl(timestamp, Timestamp, php_ion_timestamp_dtor(obj));
+
 typedef struct php_ion_catalog {
 	ION_CATALOG *cat;
 	zend_object std;
 } php_ion_catalog;
 
+php_ion_decl(catalog, Catalog);
+
 typedef struct php_ion_reader_options {
 	ION_READER_OPTIONS opt;
 	zend_object *cat, *dec_ctx, *cb, std;
 } php_ion_reader_options;
 
+php_ion_decl(reader_options, Reader_Options);
+
 typedef struct php_ion_reader {
 	ION_READER *reader;
 	ION_TYPE state;
@@ -519,14 +695,10 @@ typedef struct php_ion_reader {
 			ION_STRING buf;
 		} stream;
 	};
-	struct {
-		zend_bool call_magic_unserialize;
-		zend_string *custom_unserialize;
-	} php;
 	zend_object *opt, std;
 } php_ion_reader;
 
-static iERR php_ion_reader_stream_handler(struct _ion_user_stream *user)
+static inline iERR php_ion_reader_stream_handler(struct _ion_user_stream *user)
 {
 	php_ion_reader *reader = (php_ion_reader *) user->handler_state;
 	size_t remaining = 0, spare = reader->stream.buf.length;
@@ -552,7 +724,7 @@ static iERR php_ion_reader_stream_handler(struct _ion_user_stream *user)
 	return IERR_READ_ERROR;
 }
 
-static iERR on_context_change(void *context, ION_COLLECTION *imports)
+static inline iERR on_context_change(void *context, ION_COLLECTION *imports)
 {
 	if (context) {
 		php_ion_reader *obj = php_ion_obj(reader, context);
@@ -614,11 +786,15 @@ static inline void php_ion_reader_dtor(php_ion_reader *obj)
 	}
 }
 
+php_ion_decl(reader, Reader_Reader, php_ion_reader_dtor(obj));
+
 typedef struct php_ion_writer_options {
 	ION_WRITER_OPTIONS opt;
 	zend_object *cat, *dec_ctx, *col, std;
 } php_ion_writer_options;
 
+php_ion_decl(writer_options, Writer_Options);
+
 typedef struct php_ion_writer {
 	ION_WRITER *writer;
 	enum {
@@ -635,15 +811,11 @@ typedef struct php_ion_writer {
 			php_stream *ptr;
 		} stream;
 	};
-	struct {
-		zend_bool call_magic_serialize;
-		zend_string *custom_serialize;
-	} php;
 	zend_object *opt, std;
 
 } php_ion_writer;
 
-static iERR php_ion_writer_stream_handler(struct _ion_user_stream *user)
+static inline iERR php_ion_writer_stream_handler(struct _ion_user_stream *user)
 {
 	php_ion_writer *writer = (php_ion_writer *) user->handler_state;
 
@@ -720,7 +892,7 @@ static inline void php_ion_writer_buffer_grow(php_ion_writer *obj)
 	NEW_REF_STR();
 }
 
-static iERR php_ion_writer_buffer_handler(struct _ion_user_stream *user)
+static inline iERR php_ion_writer_buffer_handler(struct _ion_user_stream *user)
 {
 	php_ion_writer *writer = (php_ion_writer *) user->handler_state;
 
@@ -770,20 +942,57 @@ static inline void php_ion_writer_dtor(php_ion_writer *obj)
 			zend_list_delete(obj->stream.ptr->res);
 		}
 	} else {
-		smart_str_0(&obj->buffer.str);
-		zend_string_release(obj->buffer.str.s);
+		if (obj->buffer.str.s) {
+			smart_str_0(&obj->buffer.str);
+			zend_string_release(obj->buffer.str.s);
+		}
 		zval_ptr_dtor(&obj->buffer.val);
 	}
-	if (obj->php.custom_serialize) {
-		zend_string_release(obj->php.custom_serialize);
+}
+
+php_ion_decl(writer, Writer_Writer, php_ion_writer_dtor(obj));
+
+typedef struct php_ion_serializer_php {
+	php_ion_serializer serializer;
+	zend_object *opt, std;
+} php_ion_serializer_php;
+
+static inline void php_ion_serializer_php_ctor(php_ion_serializer_php *ser_obj)
+{
+	php_ion_serializer *global_ser = &php_ion_globals.serializer;
+	ser_obj->serializer.ids = global_ser->ids;
+	ser_obj->serializer.tmp = global_ser->tmp;
+
+	zend_update_property_bool(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callMagicSerialize"),
+			ser_obj->serializer.call_magic);
+	if (ser_obj->serializer.call_custom) {
+		zend_update_property_str(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomSerialize"),
+				ser_obj->serializer.call_custom);
+		ser_obj->serializer.call_custom = zend_string_tolower(ser_obj->serializer.call_custom);
+ 	} else {
+		zend_update_property_null(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomSerialize"));
+	}
+	if (ser_obj->opt) {
+		php_ion_writer_options *o_woptions = php_ion_obj(writer_options, ser_obj->opt);
+		ser_obj->serializer.options = &o_woptions->opt;
+		update_property_obj(&ser_obj->std, ZEND_STRL("writerOptions"), ser_obj->opt);
+	} else {
+		zend_update_property_null(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("writerOptions"));
+	}
+}
+
+static inline void php_ion_serializer_php_dtor(php_ion_serializer_php *obj)
+{
+	if (obj->serializer.call_custom) {
+		zend_string_release(obj->serializer.call_custom);
 	}
 }
 
-static inline void php_ion_serialize_zval(php_ion_writer *, zval *);
+static inline void php_ion_serialize_zval(php_ion_serializer *, zval *);
 
-static inline void php_ion_serialize_struct(php_ion_writer *obj, zend_array *arr)
+static inline void php_ion_serialize_struct(php_ion_serializer *ser, zend_array *arr, bool props)
 {
-	ION_CHECK(ion_writer_start_container(obj->writer, tid_STRUCT));
+	ION_CHECK(ion_writer_start_container(ser->writer, tid_STRUCT));
 
 	zval *v;
 	zend_ulong h;
@@ -791,43 +1000,52 @@ static inline void php_ion_serialize_struct(php_ion_writer *obj, zend_array *arr
 	if (arr) ZEND_HASH_FOREACH_KEY_VAL_IND(arr, h, k, v)
 		ION_STRING is;
 		if (k) {
-			ION_CHECK(ion_writer_write_field_name(obj->writer, ion_string_from_zend(&is, k)));
+			size_t prop_len;
+			const char *class_name, *prop_name;
+			if (props && (SUCCESS == zend_unmangle_property_name_ex(k, &class_name, &prop_name, &prop_len)) && class_name) {
+				ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("p"))));
+				ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, (char *) class_name, prop_name - class_name - 1)));
+			} else {
+				prop_name = k->val;
+				prop_len = k->len;
+			}
+			ION_CHECK(ion_writer_write_field_name(ser->writer, ion_string_assign_cstr(&is, (char *) prop_name, prop_len)));
 		} else {
-			char buf[MAX_LENGTH_OF_LONG + 1], *ptr = zend_print_ulong_to_buf(buf + sizeof(buf), h);
-			ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("i"))));
-			ION_CHECK(ion_writer_write_field_name(obj->writer, ion_string_from_cstr(&is, ptr, buf - ptr)));
+			char buf[MAX_LENGTH_OF_LONG + 1], *end = buf + sizeof(buf) - 1;
+			char *ptr = zend_print_long_to_buf(end, (zend_long) h);
+			ION_CHECK(ion_writer_write_field_name(ser->writer, ion_string_assign_cstr(&is, ptr, end - ptr)));
 		}
 
-		php_ion_serialize_zval(obj, v);
+		php_ion_serialize_zval(ser, v);
 		ION_CATCH();
 	ZEND_HASH_FOREACH_END();
 
-	ION_CHECK(ion_writer_finish_container(obj->writer));
+	ION_CHECK(ion_writer_finish_container(ser->writer));
 }
 
-static inline void php_ion_serialize_list(php_ion_writer *obj, zend_array *arr)
+static inline void php_ion_serialize_list(php_ion_serializer *ser, zend_array *arr)
 {
-	ION_CHECK(ion_writer_start_container(obj->writer, tid_LIST));
+	ION_CHECK(ion_writer_start_container(ser->writer, tid_LIST));
 
 	zval *v;
 	ZEND_HASH_FOREACH_VAL_IND(arr, v)
-		php_ion_serialize_zval(obj, v);
+		php_ion_serialize_zval(ser, v);
 		ION_CATCH();
 	ZEND_HASH_FOREACH_END();
 
-	ION_CHECK(ion_writer_finish_container(obj->writer));
+	ION_CHECK(ion_writer_finish_container(ser->writer));
 }
 
-static inline void php_ion_serialize_array(php_ion_writer *obj, zend_array *arr)
+static inline void php_ion_serialize_array(php_ion_serializer *ser, zend_array *arr)
 {
 	if (zend_array_is_list(arr)) {
-		php_ion_serialize_list(obj, arr);
+		php_ion_serialize_list(ser, arr);
 	} else {
-		php_ion_serialize_struct(obj, arr);
+		php_ion_serialize_struct(ser, arr, false);
 	}
 }
 
-static inline void php_ion_serialize_object_iface(php_ion_writer *obj, zend_object *zobject)
+static inline void php_ion_serialize_object_iface(php_ion_serializer *ser, zend_object *zobject)
 {
 	uint8_t *buf;
 	size_t len;
@@ -836,9 +1054,9 @@ static inline void php_ion_serialize_object_iface(php_ion_writer *obj, zend_obje
 	ZVAL_OBJ(&tmp, zobject);
 	if (SUCCESS == zobject->ce->serialize(&tmp, &buf, &len, NULL)) {
 		ION_STRING is;
-		ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("S"))));
-		ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_zend(&is, zobject->ce->name)));
-		ION_CHECK(ion_writer_write_string(obj->writer, ion_string_from_cstr(&is, (char *) buf, len)));
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("S"))));
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_from_zend(&is, zobject->ce->name)));
+		ION_CHECK(ion_writer_write_string(ser->writer, ion_string_assign_cstr(&is, (char *) buf, len)));
 		efree(buf);
 	} else if (!EG(exception)){
 		zend_throw_exception_ex(spl_ce_UnexpectedValueException, IERR_INTERNAL_ERROR,
@@ -846,19 +1064,19 @@ static inline void php_ion_serialize_object_iface(php_ion_writer *obj, zend_obje
 	}
 }
 
-static inline void php_ion_serialize_object_magic(php_ion_writer *obj, zend_object *zobject, zend_function *fn)
+static inline void php_ion_serialize_object_magic(php_ion_serializer *ser, zend_object *zobject, zend_function *fn)
 {
 	zval rv;
 
 	ZVAL_NULL(&rv);
-	zend_call_method_with_0_params(zobject, zobject->ce, fn ? &fn : &zobject->ce->__serialize, "", &rv);
+	zend_call_known_instance_method_with_0_params(fn ? fn : zobject->ce->__serialize, zobject, &rv);
 	ION_CATCH();
 
 	if (IS_ARRAY == Z_TYPE(rv)) {
 		ION_STRING is;
-		ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL(fn ? "C" : "O"))));
-		ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_zend(&is, zobject->ce->name)));
-		php_ion_serialize_zval(obj, &rv);
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, fn ? "C" : "O", 1)));
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_from_zend(&is, zobject->ce->name)));
+		php_ion_serialize_zval(ser, &rv);
 		zval_ptr_dtor(&rv);
 	} else {
 		zend_throw_exception_ex(spl_ce_UnexpectedValueException, IERR_INTERNAL_ERROR,
@@ -868,41 +1086,32 @@ static inline void php_ion_serialize_object_magic(php_ion_writer *obj, zend_obje
 	}
 }
 
-static inline zend_string *fq_enum_case(zend_object *zobject)
-{
-	zval *cn = zend_enum_fetch_case_name(zobject);
-	zend_string *en = zend_string_alloc(zobject->ce->name->len + Z_STRLEN_P(cn) + strlen("\\"), 0);
-	memcpy(en->val, zobject->ce->name->val, zobject->ce->name->len);
-	en->val[zobject->ce->name->len] = '\\';
-	memcpy(&en->val[zobject->ce->name->len + 1], Z_STRVAL_P(cn), Z_STRLEN_P(cn));
-	en->val[en->len] = 0;
-	return en;
-}
-
-static inline void php_ion_serialize_object_enum(php_ion_writer *obj, zend_object *zobject)
+static inline void php_ion_serialize_object_enum(php_ion_serializer *ser, zend_object *zobject)
 {
 	ION_STRING is;
-	ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("E"))));
+	ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("E"))));
 
-	zend_string *en = fq_enum_case(zobject);
-	ION_CHECK(ion_writer_write_string(obj->writer, ion_string_from_zend(&is, en)));
-	zend_string_release(en);
+	ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_from_zend(&is, zobject->ce->name)));
+	zval *z_cname = zend_enum_fetch_case_name(zobject);
+	ION_CHECK(ion_writer_write_symbol(ser->writer, ion_string_from_zend(&is, Z_STR_P(z_cname))));
 }
 
-static inline void php_ion_serialize_object_std(php_ion_writer *obj, zend_object *zobject)
+static inline void php_ion_serialize_object_std(php_ion_serializer *ser, zend_object *zobject)
 {
 	ION_STRING is;
-	ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("o"))));
 
 	if (zobject->ce != zend_standard_class_def) {
-		ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_zend(&is, zobject->ce->name)));
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("c"))));
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_from_zend(&is, zobject->ce->name)));
+	} else {
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("o"))));
 	}
 
 	zval zobj;
 	ZVAL_OBJ(&zobj, zobject);
 	HashTable *props = zend_get_properties_for(&zobj, ZEND_PROP_PURPOSE_SERIALIZE);
 	if (props) {
-		php_ion_serialize_struct(obj, props);
+		php_ion_serialize_struct(ser, props, true);
 		zend_release_properties(props);
 	} else {
 		zend_throw_exception_ex(spl_ce_UnexpectedValueException, IERR_INTERNAL_ERROR,
@@ -911,28 +1120,43 @@ static inline void php_ion_serialize_object_std(php_ion_writer *obj, zend_object
 	}
 }
 
-static inline bool can_call_magic_serialize(php_ion_writer *obj, zend_class_entry *ce)
+static inline void php_ion_serialize_object_lob(php_ion_serializer *ser, zend_object *zobject)
 {
-	if (ce->__serialize && obj->php.call_magic_serialize) {
-		return true;
+	zval tmp_type, *type = zend_read_property(NULL, zobject, ZEND_STRL("type"), 0, &tmp_type);
+	zval tmp_value, *value = zend_read_property(NULL, zobject, ZEND_STRL("value"), 0, &tmp_value);
+	switch (Z_LVAL_P(zend_enum_fetch_case_value(Z_OBJ_P(type)))) {
+	case tid_BLOB_INT:
+		ION_CHECK(ion_writer_write_blob(ser->writer, (BYTE *) Z_STRVAL_P(value), Z_STRLEN_P(value)));
+		break;
+	case tid_CLOB_INT:
+		ION_CHECK(ion_writer_write_clob(ser->writer, (BYTE *) Z_STRVAL_P(value), Z_STRLEN_P(value)));
+		break;
+	default:
+		zend_throw_exception_ex(spl_ce_InvalidArgumentException, IERR_INVALID_ARG,
+				"Unsupported LOB type: ion\\Type::%s", Z_STRVAL_P(zend_enum_fetch_case_name(Z_OBJ_P(type))));
+		break;
 	}
-	return false;
 }
 
-static inline bool can_call_iface_serialize(php_ion_writer *obj, zend_class_entry *ce)
+static inline bool can_call_magic_serialize(php_ion_serializer *ser, zend_class_entry *ce)
+{
+	return ce->__serialize && ser->call_magic;
+}
+
+static inline bool can_call_iface_serialize(php_ion_serializer *, zend_class_entry *ce)
 {
 	return !!ce->serialize;
 }
 
-static inline bool can_call_custom_serialize(php_ion_writer *obj, zend_object *zobject, zend_function **fn)
+static inline bool can_call_custom_serialize(php_ion_serializer *ser, zend_object *zobject, zend_function **fn)
 {
-	if (obj->php.custom_serialize) {
-		return !!((*fn = zend_hash_find_ptr(&zobject->ce->function_table, obj->php.custom_serialize)));
+	if (ser->call_custom) {
+		return !!(*fn = zend_hash_find_ptr(&zobject->ce->function_table, ser->call_custom));
 	}
 	return false;
 }
 
-static inline void php_ion_serialize_object(php_ion_writer *obj, zend_object *zobject)
+static inline void php_ion_serialize_object(php_ion_serializer *ser, zend_object *zobject)
 {
 	zend_function *fn;
 	zend_class_entry *ce = zobject->ce;
@@ -944,345 +1168,536 @@ static inline void php_ion_serialize_object(php_ion_writer *obj, zend_object *zo
 		return;
 	}
 
-	if (can_call_magic_serialize(obj, ce)) {
-		php_ion_serialize_object_magic(obj, zobject, NULL);
-	} else if (can_call_iface_serialize(obj, ce)) {
-		php_ion_serialize_object_iface(obj, zobject);
-	} else if (can_call_custom_serialize(obj, zobject, &fn)) {
-		php_ion_serialize_object_magic(obj, zobject, fn);
+	if (can_call_magic_serialize(ser, ce)) {
+		php_ion_serialize_object_magic(ser, zobject, NULL);
+	} else if (can_call_iface_serialize(ser, ce)) {
+		php_ion_serialize_object_iface(ser, zobject);
+	} else if (can_call_custom_serialize(ser, zobject, &fn)) {
+		php_ion_serialize_object_magic(ser, zobject, fn);
 	} else if (zobject->ce->ce_flags & ZEND_ACC_ENUM) {
-		php_ion_serialize_object_enum(obj, zobject);
+		php_ion_serialize_object_enum(ser, zobject);
 	} else if (ce == ce_Symbol) {
-		ION_CHECK(ion_writer_write_ion_symbol(obj->writer, &php_ion_obj(symbol, zobject)->sym));
+		ION_CHECK(ion_writer_write_ion_symbol(ser->writer, &php_ion_obj(symbol, zobject)->sym));
 	} else if (ce == ce_Decimal) {
-		ION_CHECK(ion_writer_write_ion_decimal(obj->writer, &php_ion_obj(decimal, zobject)->dec));
+		ION_CHECK(ion_writer_write_ion_decimal(ser->writer, &php_ion_obj(decimal, zobject)->dec));
 	} else if (ce == ce_Timestamp) {
 		ION_TIMESTAMP its;
 		php_ion_timestamp *pts = php_ion_obj(timestamp, zobject);
-		php_ion_writer_options *opt = php_ion_obj(writer_options, obj->opt);
-		decContext *ctx = opt ? opt->opt.decimal_context : NULL;
-		ION_CHECK(ion_writer_write_timestamp(obj->writer, ion_timestamp_from_php(&its, pts, ctx)));
+		decContext *ctx = ser->options ? ser->options->decimal_context : NULL;
+		ION_CHECK(ion_writer_write_timestamp(ser->writer, ion_timestamp_from_php(&its, pts, ctx)));
+	} else if (ce == ce_LOB) {
+		php_ion_serialize_object_lob(ser, zobject);
 	} else {
-		php_ion_serialize_object_std(obj, zobject);
+		php_ion_serialize_object_std(ser, zobject);
 	}
 }
 
-static inline void php_ion_serialize_refcounted(php_ion_writer *obj, zval *zv)
+static inline void php_ion_serialize_refcounted(php_ion_serializer *ser, zval *zv)
 {
 	zend_ulong idx = (zend_ulong) (uintptr_t) Z_COUNTED_P(zv);
 
 	ION_STRING is;
-	if (zend_hash_index_exists(&php_ion_globals.serializer.ids, idx)) {
-		zval *num = zend_hash_index_find(&php_ion_globals.serializer.ids, idx);
+	if (zend_hash_index_exists(ser->ids, idx)) {
+		zval *num = zend_hash_index_find(ser->ids, idx);
 
-		ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("r"))));
-		ION_CHECK(ion_writer_write_int64(obj->writer, Z_LVAL_P(num)));
+		ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("r"))));
+		ION_CHECK(ion_writer_write_int64(ser->writer, Z_LVAL_P(num)));
 	} else {
 		zval num;
 
-		ZVAL_LONG(&num, zend_hash_num_elements(&php_ion_globals.serializer.ids));
-		zend_hash_index_add(&php_ion_globals.serializer.ids, idx, &num);
+		ZVAL_LONG(&num, zend_hash_num_elements(ser->ids));
+		zend_hash_index_add(ser->ids, idx, &num);
 
 		Z_TRY_ADDREF_P(zv);
-		zend_hash_next_index_insert(&php_ion_globals.serializer.tmp, zv);
+		zend_hash_next_index_insert(ser->tmp, zv);
 
 		switch (Z_TYPE_P(zv)) {
 		case IS_STRING:
-			ION_CHECK(ion_writer_write_string(obj->writer, ion_string_from_zend(&is, Z_STR_P(zv))));
+			ION_CHECK(ion_writer_write_string(ser->writer, ion_string_from_zend(&is, Z_STR_P(zv))));
 			break;
 
 		case IS_ARRAY:
-			php_ion_serialize_array(obj, Z_ARRVAL_P(zv));
+			php_ion_serialize_array(ser, Z_ARRVAL_P(zv));
 			break;
 
 		case IS_OBJECT:
-			php_ion_serialize_object(obj, Z_OBJ_P(zv));
+			php_ion_serialize_object(ser, Z_OBJ_P(zv));
 			break;
 
 		case IS_REFERENCE:
-			ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("R"))));
-			php_ion_serialize_zval(obj, Z_REFVAL_P(zv));
+			ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("R"))));
+			php_ion_serialize_zval(ser, Z_REFVAL_P(zv));
 			break;
 		}
 	}
 }
 
-static inline void php_ion_serialize_zval(php_ion_writer *obj, zval *zv)
+static inline void php_ion_serialize_zval(php_ion_serializer *ser, zval *zv)
 {
-	OBJ_CHECK(obj);
+	OBJ_CHECK(ser);
 
 	switch (Z_TYPE_P(zv)) {
 	case IS_NULL:
-		ION_CHECK(ion_writer_write_null(obj->writer));
+		ION_CHECK(ion_writer_write_null(ser->writer));
 		break;
 	case IS_TRUE:
-		ION_CHECK(ion_writer_write_bool(obj->writer, TRUE));
+		ION_CHECK(ion_writer_write_bool(ser->writer, TRUE));
 		break;
 	case IS_FALSE:
-		ION_CHECK(ion_writer_write_bool(obj->writer, FALSE));
+		ION_CHECK(ion_writer_write_bool(ser->writer, FALSE));
 		break;
 	case IS_LONG:
-		ION_CHECK(ion_writer_write_int64(obj->writer, Z_LVAL_P(zv)));
+		ION_CHECK(ion_writer_write_int64(ser->writer, Z_LVAL_P(zv)));
 		break;
 	case IS_DOUBLE:
-		ION_CHECK(ion_writer_write_double(obj->writer, Z_DVAL_P(zv)));
+		ION_CHECK(ion_writer_write_double(ser->writer, Z_DVAL_P(zv)));
 		break;
 	case IS_STRING:
 	case IS_ARRAY:
 	case IS_OBJECT:
 	case IS_REFERENCE:
-		php_ion_serialize_refcounted(obj, zv);
+		php_ion_serialize_refcounted(ser, zv);
 		break;
 	default:
 		zend_throw_exception_ex(spl_ce_InvalidArgumentException, IERR_INVALID_ARG,
-				"Failed to serialize value of type %s", zend_zval_get_legacy_type(zv)->val);
+				"Failed to serialize value of type %s", zend_zval_type_name(zv));
 	}
 }
 
-void php_ion_serialize(php_ion_writer *obj, zval *zv, zval *return_value)
+php_ion_decl(serializer_php, Serializer_PHP, php_ion_serializer_php_dtor(obj));
+
+static inline void php_ion_serialize_ex(php_ion_serializer *ser, zval *zv)
 {
-	zval zwriter;
+	HashPosition pos;
+	HashTable *arr = NULL;
 
-	if (obj) {
-		ZVAL_OBJ_COPY(&zwriter, &obj->std);
-	} else {
-		object_init_ex(&zwriter, ce_Writer_Buffer_Writer);
-		obj = php_ion_obj(writer, Z_OBJ(zwriter));
-		obj->type = BUFFER_WRITER;
-		php_ion_writer_ctor(obj);
+	if (ser->multi_seq) {
+		if (Z_TYPE_P(zv) != IS_ARRAY || !zend_array_is_list(Z_ARRVAL_P(zv))) {
+			zend_throw_exception_ex(spl_ce_InvalidArgumentException, IERR_INVALID_ARG,
+					"Expected a packed, consecutively numerically indexed array as argument to the multi sequence serializer");
+			return;
+		}
+
+		arr = Z_ARRVAL_P(zv);
+
+		zend_hash_internal_pointer_reset_ex(arr, &pos);
+		zv = zend_hash_get_current_data_ex(arr, &pos);
 	}
 
-	php_ion_globals_serializer_step();
+	while (zv) {
+		/* start off with a global PHP annotation instead of repeating it all over the place */
+		if (0 == php_ion_globals_serializer_step()) {
+			ION_STRING is;
+			ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("PHP"))));
+		}
+		php_ion_serialize_zval(ser, zv);
+		php_ion_globals_serializer_exit();
 
-	/* start off with a global PHP annotation instead of repeating it all over the place */
-	ION_STRING is;
-	ION_CHECK(ion_writer_add_annotation(obj->writer, ion_string_from_cstr(&is, ZEND_STRL("PHP"))));
+		if (!ser->multi_seq) {
+			break;
+		}
+		zend_hash_move_forward_ex(arr, &pos);
+		zv = zend_hash_get_current_data_ex(arr, &pos);
+	}
+}
 
-	php_ion_serialize_zval(obj, zv);
+void php_ion_serialize(php_ion_serializer *ser, zval *zv, zval *return_value)
+{
+	zend_object *zo_opt = NULL, *zo_ser = NULL;
 
-	/* make sure to flush when done, else str.s might not contain everything until the writer is closed */
-	ion_writer_flush(obj->writer, NULL);
-	RETVAL_STR_COPY(obj->buffer.str.s);
+	if (!ser) {
+		zo_ser = create_ion_Serializer_PHP(NULL);
+		php_ion_serializer_php *o_ser = php_ion_obj(serializer_php, zo_ser);
+		PTR_CHECK(o_ser);
+		o_ser->serializer.call_magic = true;
+		php_ion_serializer_php_ctor(o_ser);
+		ION_CATCH();
+		ser = &o_ser->serializer;
+	}
+
+	zend_object *zo_writer = create_ion_Writer_Writer(ce_Writer_Buffer_Writer);
+	php_ion_writer *writer = php_ion_obj(writer, zo_writer);
+	writer->type = BUFFER_WRITER;
+
+	if (ser->options) {
+		zo_opt = writer->opt = create_ion_Writer_Options(NULL);
+		php_ion_obj(writer_options, writer->opt)->opt = *ser->options;
+	}
+
+	php_ion_writer_ctor(writer);
+	ser->writer = writer->writer;
+	ser->buffer = &writer->buffer.str;
 
-	php_ion_globals_serializer_exit();
+	if (!EG(exception)) {
+		php_ion_serialize_ex(ser, zv);
+	}
+
+	/* make sure to flush when done, else str.s might not contain everything until the writer is closed */
+	ion_writer_flush(ser->writer, NULL);
+	RETVAL_STR_COPY(ser->buffer->s);
 
-	zval_ptr_dtor(&zwriter);
+	OBJ_RELEASE(zo_writer);
+	if (zo_opt) {
+		OBJ_RELEASE(zo_opt);
+	}
+	if (zo_ser) {
+		OBJ_RELEASE(zo_ser);
+	}
 }
 
-static inline void php_ion_unserialize_zval(php_ion_reader *obj, zval *return_value);
+typedef struct php_ion_unserializer_php {
+	php_ion_unserializer unserializer;
+	zend_object *opt, std;
+} php_ion_unserializer_php;
+
+static inline void php_ion_unserializer_php_ctor(php_ion_unserializer_php *ser_obj)
+{
+	php_ion_unserializer *global_ser = &php_ion_globals.unserializer;
+	ser_obj->unserializer.ids = global_ser->ids;
+	ser_obj->unserializer.tmp = global_ser->tmp;
+	ser_obj->unserializer.addref = global_ser->addref;
+
+	zend_update_property_bool(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callMagicSerialize"),
+			ser_obj->unserializer.call_magic);
+	if (ser_obj->unserializer.call_custom) {
+		zend_update_property_str(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomSerialize"),
+				ser_obj->unserializer.call_custom);
+		ser_obj->unserializer.call_custom = zend_string_tolower(ser_obj->unserializer.call_custom);
+	} else {
+		zend_update_property_null(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomSerialize"));
+	}
+	if (ser_obj->opt) {
+		php_ion_reader_options *o_roptions = php_ion_obj(reader_options, ser_obj->opt);
+		ser_obj->unserializer.options = &o_roptions->opt;
+		update_property_obj(&ser_obj->std, ZEND_STRL("readerOptions"), ser_obj->opt);
+	} else {
+		zend_update_property_null(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("readerOptions"));
+	}
+}
 
-static inline bool can_call_magic_unserialize(php_ion_reader *obj, zend_class_entry *ce)
+static inline void php_ion_unserializer_php_dtor(php_ion_unserializer_php *obj)
 {
-	if (ce->__unserialize && obj->php.call_magic_unserialize) {
-		return true;
+	if (obj->unserializer.call_custom) {
+		zend_string_release(obj->unserializer.call_custom);
 	}
-	return false;
 }
 
-static inline bool can_call_iface_unserialize(php_ion_reader *obj, zend_class_entry *ce)
+static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *return_value, ION_TYPE *typ);
+
+static inline bool can_call_magic_unserialize(php_ion_unserializer *ser, zend_class_entry *ce)
 {
-	return !!ce->unserialize;
+	return (ce && ce->__unserialize && ser->call_magic);
 }
 
-static inline bool can_call_custom_unserialize(php_ion_reader *obj, zend_object *zobject, zend_function **fn)
+static inline bool can_call_iface_unserialize(php_ion_unserializer *ser, zend_class_entry *ce)
 {
-	if (obj->php.custom_unserialize) {
-		return !!((*fn = zend_hash_find_ptr(&zobject->ce->function_table, obj->php.custom_unserialize)));
+	return (ce && ce->unserialize);
+}
+
+static inline bool can_call_custom_unserialize(php_ion_unserializer *ser, zend_object *zobject, zend_function **fn)
+{
+	if (ser->call_custom) {
+		return !!(*fn = zend_hash_find_ptr(&zobject->ce->function_table, ser->call_custom));
 	}
 	return false;
 }
 
-static inline zval *php_ion_unserialize_class(php_ion_reader *obj, zend_string *class_name, zval *return_value)
+static inline zval *php_ion_unserialize_class(php_ion_unserializer *ser, zval *return_value)
 {
-	zend_class_entry *ce = zend_lookup_class(class_name);
+	zend_class_entry *ce = zend_lookup_class(ser->annotations.object_class);
 
 	if (ce) {
 		object_init_ex(return_value, ce);
-		return zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+		return zend_hash_next_index_insert(ser->ids, return_value);
 	}
 
 	zend_throw_exception_ex(spl_ce_RuntimeException, IERR_IMPORT_NOT_FOUND,
-			"Could not find class %s", class_name->val);
+			"Could not find class %s", ser->annotations.object_class->val);
 	return NULL;
 }
 
-static inline void php_ion_unserialize_object_iface(php_ion_reader *obj, zend_string *class_name, zval *return_value)
+static inline void php_ion_unserialize_object_enum(php_ion_unserializer *ser, zval *return_value)
 {
-	ZEND_ASSERT(Z_TYPE_P(return_value) == IS_STRING);
-	zend_string *s = Z_STR_P(return_value);
-
-	zval *backref = php_ion_unserialize_class(obj, class_name, return_value);
+	zend_string *zs_case = zval_get_string(return_value);
 	ION_CATCH();
 
-	zend_class_entry *ce = Z_OBJCE_P(return_value);
-	if (can_call_iface_unserialize(obj, ce)) {
+	zend_class_entry *ce = zend_lookup_class(ser->annotations.object_class);
+	if (!ce || !(ce->ce_flags & ZEND_ACC_ENUM)) {
+		zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
+				"Not a valid enum: %s", ser->annotations.object_class->val);
+		return;
+	}
+	if (!zend_hash_exists(CE_CONSTANTS_TABLE(ce), zs_case)) {
+		zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
+				"Not a valid enum case: %s::%s", ser->annotations.object_class->val, zs_case->val);
+		return;
+	}
+	RETVAL_OBJ_COPY(zend_enum_get_case(ce, zs_case));
+	zend_hash_next_index_insert(ser->ids, return_value);
+	zend_string_release(zs_case);
+}
+
+static inline void php_ion_unserialize_object_iface(php_ion_unserializer *ser, zval *return_value)
+{
+	zend_class_entry *ce = zend_lookup_class(ser->annotations.object_class);
+	if (can_call_iface_unserialize(ser, ce)) {
+		zend_string *s = zval_get_string(return_value);
+		ZVAL_NULL(return_value);
+		zval *backref = zend_hash_next_index_insert(ser->ids, return_value);
 		if (SUCCESS == ce->unserialize(backref, ce, (BYTE *) s->val, s->len, NULL)) {
-			// remove all this Serializable crap in PHP-9
-			zval_ptr_dtor(return_value);
-			ZVAL_COPY_VALUE(return_value, backref);
+			RETVAL_ZVAL(backref, 0, 0);
 		} else if (!EG(exception)) {
 			zend_throw_exception_ex(spl_ce_UnexpectedValueException, IERR_INTERNAL_ERROR,
 					"Failed to unserialize class %s", ce->name->val);
 		}
+		zend_string_release(s);
 	} else {
 		zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
-				"Class %s does not implement Serializable", class_name->val);
+				"Class %s does not implement Serializable", ser->annotations.object_class->val);
 	}
+}
 
-	zend_string_release(s);
+static inline void php_ion_unserialize_field_name(php_ion_unserializer *ser, zend_string **key)
+{
+	// FIXME: symbol table
+	ION_STRING name;
+	ION_CHECK(ion_reader_get_field_name(ser->reader, &name));
+	if (!name.length) {
+		ION_SYMBOL *is_ptr;
+		ION_CHECK(ion_reader_get_field_name_symbol(ser->reader, &is_ptr));
+		if (!ION_SYMBOL_IS_NULL(is_ptr) && is_ptr->value.length) {
+			name = is_ptr->value;
+		} else if (is_ptr) {
+			char buf[MAX_LENGTH_OF_LONG + 1 + 1] = {0}, *end = buf + sizeof(buf) - 1, *ptr;
+			ptr = zend_print_long_to_buf(end, is_ptr->sid);
+			*--ptr = '$';
+			*key = zend_string_init(ptr, end - ptr, 0);
+			return;
+		}
+	}
+	*key = zend_string_from_ion(&name);
 }
 
-static inline void php_ion_unserialize_hash(php_ion_reader *obj, zval *return_value)
+static void php_ion_unserialize_props(php_ion_unserializer *ser, zval *return_value)
 {
-	ION_CHECK(ion_reader_step_in(obj->reader));
+	zend_hash_next_index_insert(ser->ids, return_value);
+
+	ION_CHECK(ion_reader_step_in(ser->reader));
 
-	ION_TYPE typ;
 	while (true) {
-		ION_CHECK(ion_reader_next(obj->reader, &typ));
+		ION_TYPE typ;
+		ION_CHECK(ion_reader_next(ser->reader, &typ));
 
 		if (typ == tid_EOF) {
 			break;
 		}
 
-		ION_STRING name;
-		ION_CHECK(ion_reader_get_field_name(obj->reader, &name));
-
-		zend_string *zkey = zend_string_from_ion(&name);
-		zval *zvalue = zend_hash_add_empty_element(HASH_OF(return_value), zkey);
-		php_ion_unserialize_zval(obj, zvalue);
-		zend_string_release(zkey);
+		zend_string *key;
+		php_ion_unserialize_field_name(ser, &key);
 		ION_CATCH();
+
+		zval zvalue;
+		php_ion_unserialize_zval(ser, &zvalue, &typ);
+		ION_CATCH(zend_string_release(key));
+
+		zend_class_entry *ce = Z_OBJCE_P(return_value);
+		if (ser->annotations.object_prop && ser->annotations.property_class->val[0] != '*') {
+			ce = zend_lookup_class(ser->annotations.property_class);
+		}
+		zend_update_property_ex(ce, Z_OBJ_P(return_value), key, &zvalue);
+		zval_ptr_dtor(&zvalue);
+		zend_string_release(key);
 	}
 
-	ION_CHECK(ion_reader_step_out(obj->reader));
+	ION_CHECK(ion_reader_step_out(ser->reader));
 }
 
-static inline void php_ion_unserialize_object_magic(php_ion_reader *obj, zend_string *class_name, bool custom, zval *return_value)
+/**
+ * @link https://amzn.github.io/ion-docs/docs/spec.html#struct
+ * When two fields in the same struct have the same name [...] Implementations must preserve all such fields,
+ * i.e., they may not discard fields that have repeated names. However, implementations may reorder fields
+ * (the binary format identifies structs that are sorted by symbolID), so certain operations may lead to
+ * nondeterministic behavior.
+ */
+static inline void php_ion_unserialize_hash(php_ion_unserializer *ser, zval *return_value)
 {
-	php_ion_unserialize_class(obj, class_name, return_value);
-	ION_CATCH();
+	zend_hash_next_index_insert(ser->ids, return_value);
 
-	zend_object *zobject = Z_OBJ_P(return_value);
-	zend_function *fn = NULL;
-	if (custom) {
-		if (!can_call_custom_unserialize(obj, Z_OBJ_P(return_value), &fn)) {
-			zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
-					"Could not find custom serializer method of %s", class_name->val);
-			return;
+	ION_CHECK(ion_reader_step_in(ser->reader));
+
+	while (true) {
+		ION_TYPE typ;
+		ION_CHECK(ion_reader_next(ser->reader, &typ));
+
+		if (typ == tid_EOF) {
+			break;
 		}
-	} else {
-		if (!can_call_magic_unserialize(obj, zobject->ce)) {
-			zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
-					"Could not find method %s::__serialize()", class_name->val);
+
+		zend_string *key;
+		php_ion_unserialize_field_name(ser, &key);
+		ION_CATCH();
+
+		zval zvalue;
+		php_ion_unserialize_zval(ser, &zvalue, &typ);
+		ION_CATCH(zend_string_release(key));
+
+		// FIXME:: too naive; b0rked if the previous value is an array
+		if (zend_symtable_exists(HASH_OF(return_value), key)) {
+			zval tmp, *prev = zend_hash_find(HASH_OF(return_value), key);
+			if (Z_TYPE_P(prev) != IS_ARRAY) {
+				array_init(&tmp);
+				Z_TRY_ADDREF_P(prev);
+				zend_hash_next_index_insert(Z_ARRVAL(tmp), prev);
+				prev = zend_hash_update(HASH_OF(return_value), key, &tmp);
+			}
+			zend_hash_next_index_insert(Z_ARRVAL_P(prev), &zvalue);
+		} else {
+			zend_symtable_update(HASH_OF(return_value), key, &zvalue);
 		}
+		zend_string_release(key);
 	}
 
-	zval sv;
-	array_init(&sv);
-	php_ion_unserialize_hash(obj, &sv);
-	ION_CATCH(zval_ptr_dtor(&sv));
-
-	zval rv;
-	ZVAL_NULL(&rv);
-	zend_call_method_with_1_params(zobject, zobject->ce, fn ? &fn : &zobject->ce->__serialize, "", &rv, &sv);
-	zval_ptr_dtor(&rv);
-	zval_ptr_dtor(&sv);
+	ION_CHECK(ion_reader_step_out(ser->reader));
 }
 
-static inline void php_ion_unserialize_object_of_class(php_ion_reader *obj, uint8_t object_type, zend_string *class_name, zval *return_value)
+static inline void verify_unserializer(php_ion_unserializer *ser, zend_object *zobject, zend_function **fn)
 {
-	switch (object_type) {
-	case 'S':
-		php_ion_unserialize_object_iface(obj, class_name, return_value);
+	switch (ser->annotations.object_type) {
+	case 'c':
+		*fn = NULL;
 		break;
 
 	case 'C':
-		php_ion_unserialize_object_magic(obj, class_name, true, return_value);
+		if (!can_call_custom_unserialize(ser, zobject, fn)) {
+			zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
+					"Could not find custom serializer method of %s", ser->annotations.object_class->val);
+		}
 		break;
 
 	case 'O':
-		php_ion_unserialize_object_magic(obj, class_name, false, return_value);
+		if (!can_call_magic_unserialize(ser, zobject->ce)) {
+			zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
+					"Could not find method %s::__unserialize()", ser->annotations.object_class->val);
+		}
+		*fn = zobject->ce->__unserialize;
 		break;
 
 	default:
 		zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
-				"Invalid object type %c", object_type);
+				"Invalid object type %c", ser->annotations.object_type);
 	}
 }
 
-static inline void php_ion_unserialize_struct(php_ion_reader *obj, uint8_t object_type, zend_string *class_name, zval *return_value)
+static inline void php_ion_unserialize_object(php_ion_unserializer *ser, zval *return_value)
 {
-	if (class_name) {
-		php_ion_unserialize_object_of_class(obj, object_type, class_name, return_value);
-	} else if (!object_type) {
+	// backup possible backref to array returned by magic/custom __serialize()
+	zval *input = zend_hash_next_index_insert(ser->tmp, return_value);
+
+	php_ion_unserialize_class(ser, return_value);
+	ION_CATCH();
+
+	zend_function *fn = NULL;
+	zend_object *zobject = Z_OBJ_P(return_value);
+	verify_unserializer(ser, zobject, &fn);
+	ION_CATCH();
+
+	// plain object
+	if (!fn) {
+		php_ion_unserialize_props(ser, return_value);
+		return;
+	}
+
+	// magic object
+	if (Z_TYPE_P(input) != IS_ARRAY) {
+		zval_ptr_dtor(input);
+		array_init(input);
+		zend_hash_real_init_mixed(Z_ARRVAL_P(input));
+		php_ion_unserialize_hash(ser, input);
+		ION_CATCH();
+	}
+	zval rv;
+	ZVAL_NULL(&rv);
+	zend_call_method_with_1_params(zobject, zobject->ce, &fn, "", &rv, input);
+	zval_ptr_dtor(&rv);
+}
+
+static inline void php_ion_unserialize_struct(php_ion_unserializer *ser, zval *return_value)
+{
+	if (ser->annotations.object_class) {
+		switch (ser->annotations.object_type) {
+		case 'S':
+			php_ion_unserialize_object_iface(ser, return_value);
+			break;
+		case 'E':
+			php_ion_unserialize_object_enum(ser, return_value);
+			break;
+		default:
+			php_ion_unserialize_object(ser, return_value);
+		}
+	} else if (!ser->annotations.object_type) {
 		array_init(return_value);
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
-		php_ion_unserialize_hash(obj, return_value);
-	} else if (object_type == 'o') {
+		php_ion_unserialize_hash(ser, return_value);
+	} else if (ser->annotations.object_type == 'o') {
 		object_init(return_value);
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
-		php_ion_unserialize_hash(obj, return_value);
+		php_ion_unserialize_hash(ser, return_value);
 	} else {
 		zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_TOKEN,
-				"Invalid object type %c", object_type);
+				"Invalid object annotation %c::", ser->annotations.object_type);
 	}
 }
 
-static inline void php_ion_unserialize_list(php_ion_reader *obj, zval *return_value)
+static inline void php_ion_unserialize_list(php_ion_unserializer *ser, zval *return_value)
 {
-	ION_CHECK(ion_reader_step_in(obj->reader));
+	ION_CHECK(ion_reader_step_in(ser->reader));
 	array_init(return_value);
-	zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+	zend_hash_next_index_insert(ser->ids, return_value);
 
-	ION_TYPE typ;
-	HashTable *ht = Z_ARRVAL_P(return_value);
 	while (true) {
-		zval next;
-		php_ion_unserialize_zval(obj, &next);
-		ION_CATCH();
+		ION_TYPE typ;
+		ION_CHECK(ion_reader_next(ser->reader, &typ));
 
-		ION_CHECK(ion_reader_get_type(obj->reader, &typ));
 		if (typ == tid_EOF) {
 			break;
 		}
 
-		zend_hash_next_index_insert(ht, &next);
+		zval next;
+		php_ion_unserialize_zval(ser, &next, &typ);
+		ION_CATCH();
+
+		zend_hash_next_index_insert(Z_ARRVAL_P(return_value), &next);
 	}
 
-	ION_CHECK(ion_reader_step_out(obj->reader));
+	ION_CHECK(ion_reader_step_out(ser->reader));
 }
 
-static inline void php_ion_unserialize_lob(php_ion_reader *obj, zval *return_value)
+static inline void php_ion_reader_read_lob(ION_READER *reader, zval *return_value)
 {
 	zend_string *zstr = zend_string_alloc(0x1000, 0);
 again:
 	SIZE read = 0;
-	iERR err = ion_reader_read_lob_bytes(obj->reader, (BYTE *) zstr->val, zstr->len, &read);
+	iERR err = ion_reader_read_lob_bytes(reader, (BYTE *) zstr->val, zstr->len, &read);
 	if (err == IERR_BUFFER_TOO_SMALL) {
 		zstr = zend_string_extend(zstr, zstr->len << 2, 0);
 		goto again;
 	}
 	ION_CHECK(err, zend_string_release(zstr));
 	if (zstr->len > read) {
+		zstr->val[read] = 0;
 		zstr = zend_string_truncate(zstr, read, 0);
 	}
 	RETURN_STR(zstr);
 }
 
-static inline void php_ion_unserialize_timestamp(php_ion_reader *obj, zval *return_value)
+static inline void php_ion_reader_read_timestamp(ION_READER *reader, ION_READER_OPTIONS *opt, zval *return_value)
 {
 	ION_TIMESTAMP ts;
-	ION_CHECK(ion_reader_read_timestamp(obj->reader, &ts));
-
-	decContext *ctx = NULL;
-	if (obj->opt) {
-		ctx = php_ion_obj(reader_options, obj->opt)->opt.decimal_context;
-	}
+	ION_CHECK(ion_reader_read_timestamp(reader, &ts));
 
 	object_init_ex(return_value, ce_Timestamp);
 	php_ion_timestamp *ts_obj = php_ion_obj(timestamp, Z_OBJ_P(return_value));
 
 	zend_string *fmt = NULL;
+	decContext *ctx = opt ? opt->decimal_context : NULL;
 	ts_obj->time = php_time_from_ion(&ts, ctx, &fmt);
 	php_ion_timestamp_ctor(ts_obj, ts.precision, fmt, NULL, NULL);
 	zend_string_release(fmt);
@@ -1290,11 +1705,11 @@ static inline void php_ion_unserialize_timestamp(php_ion_reader *obj, zval *retu
 	OBJ_CHECK(ts_obj);
 }
 
-static inline void php_ion_unserialize_int(php_ion_reader *obj, zval *return_value)
+static inline void php_ion_reader_read_int(ION_READER *reader, zval *return_value)
 {
 	ION_INT *num = NULL;
-	ION_CHECK(ion_int_alloc(obj->reader, &num));
-	ION_CHECK(ion_reader_read_ion_int(obj->reader, num));
+	ION_CHECK(ion_int_alloc(reader, &num));
+	ION_CHECK(ion_reader_read_ion_int(reader, num));
 
 	// TODO: SIZEOF_ZEND_LONG == 4
 	int64_t i64;
@@ -1307,10 +1722,10 @@ static inline void php_ion_unserialize_int(php_ion_reader *obj, zval *return_val
 	case IERR_NUMERIC_OVERFLOW:
 		SIZE max, len;
 		ION_CHECK(ion_int_char_length(num, &max));
-		zend_string *zs = zend_string_alloc(max-1, 0);
+		zend_string *zs = zend_string_alloc(max, 0);
 
 		err = ion_int_to_char(num, (BYTE *) zs->val, max, &len);
-		ZEND_ASSERT(len == zs->len);
+		zs->val[zs->len = len] = 0;
 		RETVAL_STR(zs);
 		/* fall through */
 
@@ -1321,137 +1736,221 @@ static inline void php_ion_unserialize_int(php_ion_reader *obj, zval *return_val
 	}
 }
 
-static inline void php_ion_unserialize_backref(php_ion_reader *obj, zval *return_value)
+static inline void php_ion_unserialize_backref(php_ion_unserializer *ser, zval *return_value)
 {
-	php_ion_global_unserializer *u = &php_ion_globals.unserializer;
-	zval *backref = zend_hash_index_find(&u->ids, Z_LVAL_P(return_value));
+	zval *backref = zend_hash_index_find(ser->ids, Z_LVAL_P(return_value));
 
 	if (backref) {
-		ZVAL_COPY(return_value, backref);
+		ZVAL_COPY_VALUE(return_value, backref);
+		zend_hash_next_index_insert(ser->addref, return_value);
 	} else {
 		zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INTERNAL_ERROR,
-				"Could not find backref %ld", Z_LVAL_P(return_value));
+				"Could not find back reference %ld", Z_LVAL_P(return_value));
 	}
 }
 
-static inline void php_ion_unserialize_zval(php_ion_reader *obj, zval *return_value)
+static inline void php_ion_unserialize_annotations(php_ion_unserializer *ser)
 {
-	ION_TYPE typ;
-	ION_CHECK(ion_reader_next(obj->reader, &typ));
+	memset(&ser->annotations, 0, sizeof(ser->annotations));
 
-#define next_annotation() do { \
-	if (ann_count) { \
-		--ann_count; \
-		ION_CHECK(ion_reader_get_an_annotation(obj->reader, ann_index++, &annotation)); \
-	} \
-} while (0)
-#define has_annotation(a) (has_annotations && annotation.length == 1 && annotation.value[0] == a)
+	int32_t ann_cnt;
+	ION_CHECK(ion_reader_get_annotation_count(ser->reader, &ann_cnt));
+	for (int32_t i = 0; i < ann_cnt; ++i) {
+		ION_STRING ann_str;
+		ION_CHECK(ion_reader_get_an_annotation(ser->reader, i, &ann_str));
+
+		if (ann_str.length != 1) {
+			continue;
+		}
+
+		switch (*ann_str.value) {
+		case 'R':
+			if (ser->annotations.makeref) {
+				zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+						"Invalid multiple reference annotations");
+				return;
+			}
+			ser->annotations.makeref = true;
+			break;
+
+		case 'r':
+			if (ser->annotations.backref) {
+				zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+						"Invalid multiple back reference annotations");
+				return;
+			}
+			ser->annotations.backref = true;
+			break;
 
-	BOOL has_annotations;
-	int32_t ann_index = 0, ann_count = 0;
-	ION_STRING annotation = {0};
-	ION_CHECK(ion_reader_has_any_annotations(obj->reader, &has_annotations));
-	if (has_annotations) {
-		ION_CHECK(ion_reader_get_annotation_count(obj->reader, &ann_count));
-		next_annotation();
+		case 'p':
+			if (ser->annotations.object_prop) {
+				zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+						"Invalid multiple object property annotations");
+				return;
+			}
+			ser->annotations.object_prop = true;
+
+			ION_STRING prop_class;
+			ION_CHECK(ion_reader_get_an_annotation(ser->reader, ++i, &prop_class));
+			ser->annotations.property_class = zend_string_from_ion(&prop_class);
+
+			zval zptmp;
+			ZVAL_STR(&zptmp, ser->annotations.property_class);
+			zend_hash_next_index_insert(ser->tmp, &zptmp);
+			break;
+
+		case 'E':
+		case 'S':
+		case 'O':
+		case 'C':
+		case 'o':
+		case 'c':
+			if (ser->annotations.object_type) {
+				zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+						"Invalid multiple object type annotations: %c::%c",
+						ser->annotations.object_type, *ann_str.value);
+				return;
+			}
+			if ('o' != (ser->annotations.object_type = *ann_str.value)) {
+				ION_STRING class_name;
+				ION_CHECK(ion_reader_get_an_annotation(ser->reader, ++i, &class_name));
+				ser->annotations.object_class = zend_string_from_ion(&class_name);
+
+				zval zctmp;
+				ZVAL_STR(&zctmp, ser->annotations.object_class);
+				zend_hash_next_index_insert(ser->tmp, &zctmp);
+			}
+			break;
+		}
+
+		// sanity checks
+		if (ser->annotations.object_type && ser->annotations.object_type != 'o' && !ser->annotations.object_class) {
+			zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+					"Invalid object annotation without class name: %c::", ser->annotations.object_type);
+			return;
+		}
+		if (ser->annotations.object_type == 'o' && ser->annotations.object_class) {
+			zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+					"Invalid object annotation with class name: o::%s", ser->annotations.object_class->val);
+			return;
+		}
 	}
+}
 
-	if (has_annotation('r')) {
-		// BACKREF
-		php_ion_unserialize_int(obj, return_value);
-		ION_CATCH();
-		php_ion_unserialize_backref(obj, return_value);
-		ION_CATCH();
-		return;
+static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *return_value, ION_TYPE *typ)
+{
+	if (typ) {
+		memcpy(&ser->type, typ, sizeof(ser->type));
+	} else {
+		typ = &ser->type;
+		ION_CHECK(ion_reader_next(ser->reader, typ));
 	}
 
-	if (has_annotation('R')) {
-		// REFERENCE
+	php_ion_unserialize_annotations(ser);
+	ION_CATCH();
+
+	if (ser->annotations.makeref) {
 		ZVAL_MAKE_REF(return_value);
+		zend_hash_next_index_insert(ser->ids, return_value);
 		ZVAL_DEREF(return_value);
-		next_annotation();
 	}
 
-	BOOL bval;
-	ION_CHECK(ion_reader_is_null(obj->reader, &bval));
-	if (bval) {
-		goto read_null;
+	if (ION_TYPE_INT(*typ) > 0) {
+		BOOL is_null;
+		ION_CHECK(ion_reader_is_null(ser->reader, &is_null));
+		if (is_null) {
+			RETURN_NULL();
+		}
 	}
 
-	switch (ION_TYPE_INT(typ)) {
+	switch (ION_TYPE_INT(*typ)) {
 	case tid_NULL_INT:
-	read_null: ;
-		ION_CHECK(ion_reader_read_null(obj->reader, &typ));
+		ION_CHECK(ion_reader_read_null(ser->reader, typ));
 		RETURN_NULL();
 
 	case tid_BOOL_INT:
-		ION_CHECK(ion_reader_read_bool(obj->reader, &bval));
+		BOOL bval;
+		ION_CHECK(ion_reader_read_bool(ser->reader, &bval));
 		RETURN_BOOL(bval);
 
 	case tid_INT_INT:
-		php_ion_unserialize_int(obj, return_value);
+		php_ion_reader_read_int(ser->reader, return_value);
+		if (ser->annotations.backref) {
+			ION_CATCH();
+			php_ion_unserialize_backref(ser, return_value);
+		}
+		if (ser->annotations.object_type) {
+			if (!ser->annotations.backref) {
+				zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INVALID_SYNTAX,
+						"Invalid object type annotation: %c::" ZEND_LONG_FMT,
+						ser->annotations.object_type, Z_LVAL_P(return_value));
+				return;
+			}
+			goto unserialize_struct;
+		}
 		return;
 
 	case tid_FLOAT_INT:
-		ION_CHECK(ion_reader_read_double(obj->reader, &Z_DVAL_P(return_value)));
-		return;
+		double d;
+		ION_CHECK(ion_reader_read_double(ser->reader, &d));
+		RETURN_DOUBLE(d);
 
 	case tid_DECIMAL_INT:
 		object_init_ex(return_value, ce_Decimal);
 		php_ion_decimal *dec = php_ion_obj(decimal, Z_OBJ_P(return_value));
-		ION_CHECK(ion_reader_read_ion_decimal(obj->reader, &dec->dec));
+		ION_CHECK(ion_reader_read_ion_decimal(ser->reader, &dec->dec));
 		php_ion_decimal_ctor(dec);
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+		zend_hash_next_index_insert(ser->ids, return_value);
 		return;
 
 	case tid_TIMESTAMP_INT:
-		php_ion_unserialize_timestamp(obj, return_value);
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+		php_ion_reader_read_timestamp(ser->reader, ser->options, return_value);
+		zend_hash_next_index_insert(ser->ids, return_value);
 		return;
 
 	case tid_SYMBOL_INT:
 		ION_SYMBOL sym;
-		ION_CHECK(ion_reader_read_ion_symbol(obj->reader, &sym));
+		ION_CHECK(ion_reader_read_ion_symbol(ser->reader, &sym));
 		php_ion_symbol_zval(&sym, return_value);
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+		if (ser->annotations.object_type) {
+			zend_hash_next_index_insert(ser->tmp, return_value);
+			goto unserialize_struct;
+		}
+		zend_hash_next_index_insert(ser->ids, return_value);
 		return;
 
 	case tid_STRING_INT:
 		ION_STRING str;
-		ION_CHECK(ion_reader_read_string(obj->reader, &str));
+		ION_CHECK(ion_reader_read_string(ser->reader, &str));
 		RETVAL_STRINGL((char *) str.value, str.length);
-		if (has_annotation('S')) {
-			goto serializable;
+		if (ser->annotations.object_type) {
+			zend_hash_next_index_insert(ser->tmp, return_value);
+			goto unserialize_struct;
 		}
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+		zend_hash_next_index_insert(ser->ids, return_value);
 		return;
 
 	case tid_CLOB_INT:
 	case tid_BLOB_INT:
-		php_ion_unserialize_lob(obj, return_value);
-		if (has_annotation('S')) {
-			goto serializable;
+		php_ion_reader_read_lob(ser->reader, return_value);
+		if (ser->annotations.object_type) {
+			zend_hash_next_index_insert(ser->tmp, return_value);
+			goto unserialize_struct;
 		}
-		zend_hash_next_index_insert(&php_ion_globals.unserializer.ids, return_value);
+		zend_hash_next_index_insert(ser->ids, return_value);
 		return;
 
 	case tid_LIST_INT:
 	case tid_SEXP_INT: // FIXME
-		php_ion_unserialize_list(obj, return_value);
-		return;
+		php_ion_unserialize_list(ser, return_value);
+		if (!ser->annotations.object_type) {
+			return;
+		}
+		/* fall through */
 
 	case tid_STRUCT_INT:
-	serializable: ;
-		zend_string *class_name = NULL;
-		uint8_t object_type = annotation.length == 1 ? annotation.value[0] : 0;
-		if (object_type && object_type != 'o') {
-			next_annotation();
-			class_name = zend_string_from_ion(&annotation);
-		}
-		php_ion_unserialize_struct(obj, object_type, class_name, return_value);
-		if (class_name) {
-			zend_string_release(class_name);
-		}
+unserialize_struct: ;
+		php_ion_unserialize_struct(ser, return_value);
 		return;
 
 	case tid_none_INT:
@@ -1459,28 +1958,90 @@ static inline void php_ion_unserialize_zval(php_ion_reader *obj, zval *return_va
 		break;
 
 	case tid_DATAGRAM_INT:
+		ZEND_ASSERT(!"datagram");
 	case tid_EOF_INT:
 		return;
 	}
 }
 
-void php_ion_unserialize(php_ion_reader *obj, zend_string *zstr, zval *return_value)
+php_ion_decl(unserializer_php, Unserializer_PHP, php_ion_unserializer_php_dtor(obj));
+
+static inline void php_ion_unserialize_ex(php_ion_unserializer *ser, zval *return_value)
+{
+	if (ser->multi_seq) {
+		array_init(return_value);
+	}
+
+	do {
+		zval tmp;
+		ZVAL_NULL(&tmp);
+		php_ion_globals_unserializer_step();
+		php_ion_unserialize_zval(ser, &tmp, NULL);
+		php_ion_globals_unserializer_exit();
+		ION_CATCH(zval_ptr_dtor(&tmp));
+
+		if (!ser->multi_seq) {
+			RETURN_COPY_VALUE(&tmp);
+		} else if (ser->type != tid_EOF) {
+			zend_hash_next_index_insert(Z_ARRVAL_P(return_value), &tmp);
+		}
+	} while (ser->type != tid_EOF);
+}
+
+void php_ion_unserialize(php_ion_unserializer *ser, zval *zdata, zval *return_value)
 {
-	zval zreader;
+	zend_object *zo_opt = NULL, *zo_ser = NULL;
 
-	if (obj) {
-		ZVAL_OBJ_COPY(&zreader, &obj->std);
+	if (!ser) {
+		zo_ser = create_ion_Unserializer_PHP(NULL);
+		php_ion_unserializer_php *o_ser = php_ion_obj(unserializer_php, zo_ser);
+		PTR_CHECK(o_ser);
+		o_ser->unserializer.call_magic = true;
+		php_ion_unserializer_php_ctor(o_ser);
+		ION_CATCH();
+		ser = &o_ser->unserializer;
+	}
+
+	zend_object *zo_reader;
+	php_ion_reader *reader;
+	ZVAL_DEREF(zdata);
+
+	if (Z_TYPE_P(zdata) == IS_RESOURCE) {
+		zo_reader = create_ion_Reader_Reader(ce_Reader_Stream_Reader);
+		reader = php_ion_obj(reader, zo_reader);
+		reader->type = STREAM_READER;
+		php_stream_from_zval_no_verify(reader->stream.ptr, zdata);
+	} else if (Z_TYPE_P(zdata) <= IS_STRING) {
+		zo_reader = create_ion_Reader_Reader(ce_Reader_Buffer_Reader);
+		reader = php_ion_obj(reader, zo_reader);
+		reader->type = BUFFER_READER;
+		reader->buffer = zval_get_string(zdata);
 	} else {
-		object_init_ex(&zreader, ce_Reader_Buffer_Reader);
-		obj = php_ion_obj(reader, Z_OBJ(zreader));
-		obj->type = BUFFER_READER;
-		obj->buffer = zend_string_copy(zstr);
-		php_ion_reader_ctor(obj);
+		zend_throw_exception_ex(spl_ce_InvalidArgumentException, IERR_INVALID_ARG,
+				"Invalid source to unserialize; expected string or resource");
+		if (zo_ser) {
+			OBJ_RELEASE(zo_ser);
+		}
+		return;
+	}
+
+	if (ser->options) {
+		zo_opt = reader->opt = create_ion_Reader_Options(NULL);
+		php_ion_obj(reader_options, reader->opt)->opt = *ser->options;
 	}
 
-	php_ion_globals_serializer_step();
-	php_ion_unserialize_zval(obj, return_value);
-	php_ion_globals_serializer_exit();
+	php_ion_reader_ctor(reader);
+	ser->reader = reader->reader;
 
-	zval_ptr_dtor(&zreader);
+	if (!EG(exception)) {
+		php_ion_unserialize_ex(ser, return_value);
+	}
+
+	OBJ_RELEASE(zo_reader);
+	if (zo_opt)  {
+		OBJ_RELEASE(zo_opt);
+	}
+	if (zo_ser) {
+		OBJ_RELEASE(zo_ser);
+	}
 }