draft package.xml
[awesomized/ext-ion] / ion_private.h
index 342b1646867a5a1fac90335c7b682068de03cc5e..50d99213dbc236740c9ece3ebad95491d43f9c60 100644 (file)
 */
 
 #include "php.h"
+#include "ext/standard/php_var.h"
 #include "ext/date/php_date.h"
 
+#if PHP_DEBUG
+# define LOCAL static
+#else
+# define LOCAL static inline
+#endif
+
 #define DECNUMDIGITS 34 /* DECQUAD_Pmax */
 #include "ionc/ion.h"
 
 #define PHP_ION_SYMBOL_TABLE_VERSION 1
-#define PHP_ION_SYMBOL(e, s) {0, {sizeof(e)-1, (BYTE *) e}, {sizeof(s)-1, (BYTE *) s}},
+#define PHP_ION_SYMBOL(c, s) { \
+       { \
+               0, \
+               { sizeof(s)-1, (BYTE *) s }, \
+               { { 0, NULL }, 0 }, \
+               0 \
+       }, \
+       { sizeof(c)-1, (BYTE *) c } \
+},
 
 typedef struct php_ion_global_symbol {
-       SID id;
+       ION_SYMBOL s;
        ION_STRING e;
-       ION_STRING s;
 } php_ion_global_symbol;
 
 static php_ion_global_symbol g_sym_tab_php_sym[] = {
-       PHP_ION_SYMBOL("PHP", "PHP")
-       PHP_ION_SYMBOL("Reference", "R")
-       PHP_ION_SYMBOL("Backref", "r")
-       PHP_ION_SYMBOL("Property", "p")
-       PHP_ION_SYMBOL("ClassObject", "c")
-       PHP_ION_SYMBOL("CustomObject", "C")
-       PHP_ION_SYMBOL("Object", "o")
-       PHP_ION_SYMBOL("MagicObject", "O")
-       PHP_ION_SYMBOL("Serializable", "S")
+#define PHP_ION_SYMBOL_PHP                             (g_sym_tab_php_sym[0]).s
+       PHP_ION_SYMBOL("PHP",                   "PHP")
+#define PHP_ION_SYMBOL_REFERENCE               (g_sym_tab_php_sym[1]).s
+       PHP_ION_SYMBOL("Reference",             "R")
+#define PHP_ION_SYMBOL_BACKREF                 (g_sym_tab_php_sym[2]).s
+       PHP_ION_SYMBOL("Backref",               "r")
+#define PHP_ION_SYMBOL_PROPERTY                        (g_sym_tab_php_sym[3]).s
+       PHP_ION_SYMBOL("Property",              "p")
+#define PHP_ION_SYMBOL_CLASS_OBJECT            (g_sym_tab_php_sym[4]).s
+       PHP_ION_SYMBOL("ClassObject",   "c")
+#define PHP_ION_SYMBOL_CUSTOM_OBJECT   (g_sym_tab_php_sym[5]).s
+       PHP_ION_SYMBOL("CustomObject",  "C")
+#define PHP_ION_SYMBOL_OBJECT                  (g_sym_tab_php_sym[6]).s
+       PHP_ION_SYMBOL("Object",                "o")
+#define PHP_ION_SYMBOL_MAGIC_OBJECT            (g_sym_tab_php_sym[7]).s
+       PHP_ION_SYMBOL("MagicObject",   "O")
+#define PHP_ION_SYMBOL_SERIALIZEABLE   (g_sym_tab_php_sym[8]).s
+       PHP_ION_SYMBOL("Serializable",  "S")
+#define PHP_ION_SYMBOL_ENUM                            (g_sym_tab_php_sym[9]).s
        PHP_ION_SYMBOL("Enum", "E")
-       {0}
+       {{0}, {0}}
 };
 #undef PHP_ION_SYMBOL
 
@@ -54,7 +78,7 @@ static HashTable g_sym_map;
        g_sym_map_add(ION_SYS_SID_ ## c_name, enum_name, sizeof(enum_name)-1); \
 } while (0)
 
-static inline void g_sym_hash_add(int sid, const char *str, size_t len)
+LOCAL void g_sym_hash_add(int sid, const char *str, size_t len)
 {
        zval zl, zs;
        ZVAL_LONG(&zl, sid);
@@ -63,14 +87,14 @@ static inline void g_sym_hash_add(int sid, const char *str, size_t len)
        zend_hash_index_add(&g_sym_hash, sid, &zs);
 }
 
-static inline void g_sym_map_add(int sid, const char *str, size_t len)
+LOCAL void g_sym_map_add(int sid, const char *str, size_t len)
 {
        zval zv;
        ZVAL_LONG(&zv, sid);
        zend_hash_str_add(&g_sym_map, str, len, &zv);
 }
 
-static inline int g_sym_init(void)
+LOCAL int g_sym_init(void)
 {
        zend_hash_init(&g_sym_hash, 0, NULL, NULL, 1);
        zend_hash_init(&g_sym_map, 0, NULL, NULL, 1);
@@ -94,17 +118,37 @@ static inline int g_sym_init(void)
        }
        php_ion_global_symbol *ptr = g_sym_tab_php_sym;
        ion_symbol_table_set_version(g_sym_tab_php, PHP_ION_SYMBOL_TABLE_VERSION);
-       ion_symbol_table_set_name(g_sym_tab_php, &ptr->s);
+       ion_symbol_table_set_name(g_sym_tab_php, &ptr->s.value);
        while (ptr->e.value) {
-               ion_symbol_table_add_symbol(g_sym_tab_php, &ptr->s, &ptr->id);
-               g_sym_hash_add(sys_max_id + ptr->id, (const char *) ptr->s.value, ptr->s.length);
-               g_sym_map_add(sys_max_id + ptr->id, (const char *) ptr->e.value, ptr->e.length);
+               ion_symbol_table_add_symbol(g_sym_tab_php, &ptr->s.value, &ptr->s.sid);
+               g_sym_hash_add(sys_max_id + ptr->s.sid, (const char *) ptr->s.value.value, ptr->s.value.length);
+               g_sym_map_add(sys_max_id + ptr->s.sid, (const char *) ptr->e.value, ptr->e.length);
                ++ptr;
        }
        ion_symbol_table_lock(g_sym_tab_php);
        return SUCCESS;
 }
 
+static struct {
+       zend_string *Year, *Month, *Day, *Min, *Sec, *Frac, *MinTZ, *SecTZ, *FracTZ;
+} g_intern_str;
+
+static void g_intern_str_init()
+{
+#define NEW_INTERN_STR(s) \
+       g_intern_str.s = zend_string_init_interned(#s, sizeof(#s)-1, 1)
+       NEW_INTERN_STR(Year);
+       NEW_INTERN_STR(Month);
+       NEW_INTERN_STR(Day);
+       NEW_INTERN_STR(Min);
+       NEW_INTERN_STR(Sec);
+       NEW_INTERN_STR(Frac);
+       NEW_INTERN_STR(MinTZ);
+       NEW_INTERN_STR(SecTZ);
+       NEW_INTERN_STR(FracTZ);
+#undef NEW_INTERN_STR
+}
+
 typedef struct php_ion_serializer {
        ION_WRITER *writer;
        ION_WRITER_OPTIONS *options;
@@ -119,7 +163,8 @@ typedef struct php_ion_serializer {
        HashTable *tmp;
 } php_ion_serializer;
 
-typedef struct php_ion_annotaions {
+typedef struct php_ion_annotations {
+       uint8_t shared_symtab:1;
        uint8_t backref:1;
        uint8_t makeref:1;
        uint8_t object_prop:1;
@@ -177,7 +222,6 @@ ZEND_DECLARE_MODULE_GLOBALS(ion);
 
 static zend_class_entry
        *ce_Catalog,
-       *ce_Collection,
        *ce_Decimal,
        *ce_Decimal_Context,
        *ce_Decimal_Context_Rounding,
@@ -200,6 +244,7 @@ static zend_class_entry
        *ce_Symbol_Table_Shared,
        *ce_Symbol_Table_System,
        *ce_Timestamp,
+       *ce_Timestamp_Format,
        *ce_Timestamp_Precision,
        *ce_Type,
        *ce_Unserializer,
@@ -213,17 +258,17 @@ static zend_class_entry
        *ce_Writer_Writer
        ;
 
-static inline void php_ion_globals_symbols_init(void)
+LOCAL void php_ion_globals_symbols_init(void)
 {
        zend_hash_init(&php_ion_globals.symbol.cache, 0, NULL, ZVAL_PTR_DTOR, 0);
 }
 
-static inline void php_ion_globals_symbols_dtor(void)
+LOCAL void php_ion_globals_symbols_dtor(void)
 {
        zend_hash_destroy(&php_ion_globals.symbol.cache);
 }
 
-static inline void php_ion_globals_serializer_init(void)
+LOCAL void php_ion_globals_serializer_init(void)
 {
        php_ion_serializer *s = &php_ion_globals.serializer;
        HashTable *h = php_ion_globals._ht.serializer;
@@ -232,7 +277,7 @@ static inline void php_ion_globals_serializer_init(void)
        zend_hash_init(s->ids = &h[1], 0, NULL, NULL, 0);
 }
 
-static inline uint32_t php_ion_globals_serializer_step(void)
+LOCAL uint32_t php_ion_globals_serializer_step(void)
 {
        php_ion_serializer *s = &php_ion_globals.serializer;
        uint32_t level;
@@ -244,7 +289,7 @@ static inline uint32_t php_ion_globals_serializer_step(void)
        return level;
 }
 
-static inline uint32_t php_ion_globals_serializer_exit(void)
+LOCAL uint32_t php_ion_globals_serializer_exit(void)
 {
        php_ion_serializer *s = &php_ion_globals.serializer;
 
@@ -256,7 +301,7 @@ static inline uint32_t php_ion_globals_serializer_exit(void)
        return s->level;
 }
 
-static inline void php_ion_globals_serializer_dtor(void)
+LOCAL void php_ion_globals_serializer_dtor(void)
 {
        php_ion_serializer *s = &php_ion_globals.serializer;
 
@@ -272,7 +317,7 @@ void ZVAL_ADDREF(zval *zv)
                Z_TRY_ADDREF_P(zv);
        }
 }
-static inline void php_ion_globals_unserializer_init(void)
+LOCAL void php_ion_globals_unserializer_init(void)
 {
        php_ion_unserializer *s = &php_ion_globals.unserializer;
        HashTable *h = php_ion_globals._ht.unserializer;
@@ -282,7 +327,7 @@ static inline void php_ion_globals_unserializer_init(void)
        zend_hash_init(s->addref = &h[2], 0, NULL, ZVAL_ADDREF, 0);
 }
 
-static inline void php_ion_globals_unserializer_step(void)
+LOCAL void php_ion_globals_unserializer_step(void)
 {
        php_ion_unserializer *s = &php_ion_globals.unserializer;
 
@@ -293,7 +338,7 @@ static inline void php_ion_globals_unserializer_step(void)
        }
 }
 
-static inline void php_ion_globals_unserializer_exit(void)
+LOCAL void php_ion_globals_unserializer_exit(void)
 {
        php_ion_unserializer *s = &php_ion_globals.unserializer;
 
@@ -305,7 +350,7 @@ static inline void php_ion_globals_unserializer_exit(void)
        }
 }
 
-static inline void php_ion_globals_unserializer_dtor(void)
+LOCAL void php_ion_globals_unserializer_dtor(void)
 {
        php_ion_unserializer *s = &php_ion_globals.unserializer;
 
@@ -314,9 +359,18 @@ static inline void php_ion_globals_unserializer_dtor(void)
        zend_hash_destroy(s->tmp);
 }
 
-#define php_ion_decl(type, cname, ...) \
+#define php_ion_obj(type, zo) \
+       ((php_ion_ ##type *) php_ion_obj_ex(zo, XtOffsetOf(php_ion_ ## type, std)))
+LOCAL void *php_ion_obj_ex(void *obj, ptrdiff_t offset) {
+       if (obj) {
+               return ((char *) obj) - offset;
+       }
+       return NULL;
+}
+
+#define php_ion_decl(type, cname) \
        static zend_object_handlers oh_ ## cname; \
-       static inline zend_object *create_ion_ ## cname(zend_class_entry *ce) \
+       LOCAL zend_object *create_ion_ ## cname(zend_class_entry *ce) \
        { \
                if (!ce) ce = ce_ ## cname; \
                php_ion_ ## type *o = ecalloc(1, sizeof(*o) + zend_object_properties_size(ce)); \
@@ -325,12 +379,19 @@ static inline void php_ion_globals_unserializer_dtor(void)
                o->std.handlers = &oh_ ## cname; \
                return &o->std; \
        } \
-       static inline void free_ion_ ## cname(zend_object *std) \
+       LOCAL void free_ion_ ## cname(zend_object *std) \
        { \
                php_ion_ ## type *obj = php_ion_obj(type, std); \
-               __VA_ARGS__; \
+               php_ion_ ## type ## _dtor(obj); \
                zend_object_std_dtor(std); \
-               (void) obj; \
+       } \
+       LOCAL zend_object *clone_ion_ ## cname(zend_object *std) \
+       { \
+               php_ion_ ## type *old_obj = php_ion_obj(type, std), \
+                                                *new_obj = php_ion_obj(type, create_ion_ ## cname(std->ce)); \
+               php_ion_ ## type ## _copy(new_obj, old_obj); \
+               (void) old_obj; \
+               return &new_obj->std; \
        }
 #define php_ion_register(type, cname, ...) do { \
        ce_ ## cname = register_class_ion_ ## cname(__VA_ARGS__); \
@@ -338,14 +399,12 @@ static inline void php_ion_globals_unserializer_dtor(void)
        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; \
+       oh_ ## cname .clone_obj = clone_ion_ ## cname; \
 } while (0)
 
-#define php_ion_obj(type, obj) \
-       ((php_ion_ ## type *) (obj ? ((char *)(obj) - XtOffsetOf(php_ion_ ## type, std)) : NULL))
-
 #define ION_CHECK_RETURN(r, err, ...) do { \
        iERR __err = err; \
-       if (__err) { \
+       if (UNEXPECTED(__err)) { \
                zend_throw_exception_ex(spl_ce_RuntimeException, __err, "%s: %s", ion_error_to_str(__err), #err); \
                __VA_ARGS__; \
                return r; \
@@ -356,51 +415,46 @@ static inline void php_ion_globals_unserializer_dtor(void)
        ION_CHECK_RETURN(, err, __VA_ARGS__)
 
 #define ION_CATCH(...) do { \
-       if (EG(exception)) { \
+       if (UNEXPECTED(EG(exception))) { \
                __VA_ARGS__; \
                return; \
        } \
 } while (0)
 
-#define PTR_CHECK(ptr, ...) do { \
-       if (!(ptr)) { \
+#define PTR_CHECK_RETURN(ret, ptr, ...) do { \
+       if (UNEXPECTED(!(ptr))) { \
                zend_throw_error(NULL, "Uninitialized object"); \
                __VA_ARGS__; \
-               return; \
+               return ret; \
        } \
 } while (0)
+#define PTR_CHECK(ptr, ...) PTR_CHECK_RETURN(, ptr, __VA_ARGS__)
 
-#define OBJ_CHECK(obj, ...) do { \
-       PTR_CHECK(obj, __VA_ARGS__); \
-       PTR_CHECK(*((void **)obj), __VA_ARGS__); \
+#define OBJ_CHECK_RETURN(ret, obj, ...) do { \
+       PTR_CHECK_RETURN(ret, obj, __VA_ARGS__); \
+       PTR_CHECK_RETURN(ret, *((void **)obj), __VA_ARGS__); \
 } while (0)
+#define OBJ_CHECK(obj, ...) OBJ_CHECK_RETURN(, obj, __VA_ARGS__)
 
-static inline ION_STRING *ion_string_from_zend(ION_STRING *is, const zend_string *zs)
+LOCAL ION_STRING *ion_string_from_zend(ION_STRING *is, const zend_string *zs)
 {
-       is->length = zs ? zs->len : 0;
+       is->length = zs ? (SIZE) zs->len : 0;
        is->value = (BYTE *) (zs ? zs->val : NULL);
        return is;
 }
 
-static inline zend_string *zend_string_from_ion(const ION_STRING *s)
+LOCAL zend_string *zend_string_from_ion(const ION_STRING *s)
 {
        return zend_string_init((const char *) s->value, s->length, 0);
 }
 
-static inline void update_property_obj(zend_object *obj, const char *n, size_t l, zend_object *p)
+LOCAL void update_property_obj(zend_object *obj, const char *n, size_t l, zend_object *p)
 {
        zval zobj;
        ZVAL_OBJ(&zobj, p);
        zend_update_property(obj->ce, obj, n, l, &zobj);
 }
 
-typedef struct php_ion_type {
-       ION_TYPE typ;
-       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)) { \
@@ -409,7 +463,7 @@ php_ion_decl(type, Type);
        RETURN_OBJ_COPY(__zo); \
 } while(0)
 
-static inline zend_object *php_ion_type_fetch(ION_TYPE typ)
+LOCAL zend_object *php_ion_type_fetch(ION_TYPE typ)
 {
        zend_long index = ION_TYPE_INT(typ);
        zval *ztype = zend_hash_index_find(ce_Type->backed_enum_table, index);
@@ -421,25 +475,38 @@ static inline zend_object *php_ion_type_fetch(ION_TYPE typ)
        return zend_enum_get_case(ce_Type, Z_STR_P(ztype));
 }
 
+LOCAL ION_TYPE ion_type_from_enum(zend_object *zo)
+{
+       return (ION_TYPE) Z_LVAL_P(zend_enum_fetch_case_value(zo));
+}
+
 typedef struct php_ion_symbol_iloc {
        ION_SYMBOL_IMPORT_LOCATION loc;
        zend_string *name;
        zend_object std;
 } php_ion_symbol_iloc;
 
-static inline void php_ion_symbol_iloc_ctor(php_ion_symbol_iloc *obj)
+LOCAL void php_ion_symbol_iloc_ctor(php_ion_symbol_iloc *obj)
 {
        zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("location"), obj->loc.location);
        zend_update_property_str(obj->std.ce, &obj->std, ZEND_STRL("name"), obj->name);
        ion_string_from_zend(&obj->loc.name, obj->name);
 }
 
-static inline void php_ion_symbol_iloc_dtor(php_ion_symbol_iloc *obj)
+LOCAL 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));
+LOCAL void php_ion_symbol_iloc_copy(php_ion_symbol_iloc *new_obj, php_ion_symbol_iloc *old_obj)
+{
+       zend_objects_clone_members(&new_obj->std, &old_obj->std);
+       new_obj->name = zend_string_copy(old_obj->name);
+       ion_string_from_zend(&new_obj->loc.name, new_obj->name);
+       new_obj->loc.location = old_obj->loc.location;
+}
+
+php_ion_decl(symbol_iloc, Symbol_ImportLocation);
 
 typedef struct php_ion_symbol {
        ION_SYMBOL sym;
@@ -447,7 +514,7 @@ typedef struct php_ion_symbol {
        zend_object *iloc, std;
 } php_ion_symbol;
 
-static inline int php_ion_symbol_zval_compare(zval *zv1, zval *zv2) {
+LOCAL int php_ion_symbol_zval_compare(zval *zv1, zval *zv2) {
        zend_string *zs1 = zval_get_string(zv1);
        zend_string *zs2 = zval_get_string(zv2);
 
@@ -468,7 +535,7 @@ static inline int php_ion_symbol_zval_compare(zval *zv1, zval *zv2) {
        return result;
 }
 
-static inline void php_ion_symbol_ctor(php_ion_symbol *obj)
+LOCAL void php_ion_symbol_ctor(php_ion_symbol *obj)
 {
        zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("sid"),
                obj->sym.sid);
@@ -486,14 +553,28 @@ static inline void php_ion_symbol_ctor(php_ion_symbol *obj)
        }
 }
 
-static inline void php_ion_symbol_dtor(php_ion_symbol *obj)
+LOCAL void php_ion_symbol_dtor(php_ion_symbol *obj)
 {
        if (obj->value) {
                zend_string_release(obj->value);
        }
 }
 
-static inline void php_ion_symbol_zval(ION_SYMBOL *sym_ptr, zval *return_value)
+LOCAL void php_ion_symbol_copy(php_ion_symbol *new_obj, php_ion_symbol *old_obj)
+{
+       zend_objects_clone_members(&new_obj->std, &old_obj->std);
+       new_obj->sym = old_obj->sym;
+       if (old_obj->value) {
+               new_obj->value = zend_string_copy(old_obj->value);
+               ion_string_from_zend(&new_obj->sym.value, new_obj->value);
+       }
+
+       if ((new_obj->iloc = old_obj->iloc)) {
+               new_obj->sym.import_location = php_ion_obj(symbol_iloc, new_obj->iloc)->loc;
+       }
+}
+
+LOCAL void php_ion_symbol_zval(ION_SYMBOL *sym_ptr, zval *return_value)
 {
        object_init_ex(return_value, ce_Symbol);
        php_ion_symbol *sym = php_ion_obj(symbol, Z_OBJ_P(return_value));
@@ -519,7 +600,28 @@ static inline void php_ion_symbol_zval(ION_SYMBOL *sym_ptr, zval *return_value)
        }
 }
 
-php_ion_decl(symbol, Symbol, php_ion_symbol_dtor(obj));
+LOCAL zval *php_ion_global_symbol_fetch_by_enum(zend_string *name)
+{
+       zval *zgs = zend_hash_find(&php_ion_globals.symbol.cache, name);
+       if (!zgs) {
+               zval *zid = zend_hash_find(&g_sym_map, name);
+               if (zid) {
+                       zval *zss = zend_hash_index_find(&g_sym_hash, Z_LVAL_P(zid));
+                       if (zss) {
+                               zval zsym;
+                               object_init_ex(&zsym, ce_Symbol);
+                               php_ion_symbol *sym = php_ion_obj(symbol, Z_OBJ(zsym));
+                               sym->sym.sid = Z_LVAL_P(zid);
+                               sym->value = zval_get_string(zss);
+                               php_ion_symbol_ctor(sym);
+                               zgs = zend_hash_add(&php_ion_globals.symbol.cache, name, &zsym);
+                       }
+               }
+       }
+       return zgs;
+}
+
+php_ion_decl(symbol, Symbol);
 
 typedef struct php_ion_symbol_table {
        ION_SYMBOL_TABLE *tab;
@@ -527,21 +629,25 @@ typedef struct php_ion_symbol_table {
        zend_object std;
 } php_ion_symbol_table;
 
-static inline void php_ion_symbol_table_ctor(php_ion_symbol_table *obj)
+LOCAL void php_ion_symbol_table_ctor(php_ion_symbol_table *obj)
 {
        OBJ_CHECK(obj);
 
-       ION_STRING is;
-       if (IERR_OK == ion_symbol_table_get_name(obj->tab, &is)) {
-               zend_update_property_stringl(obj->std.ce, &obj->std, ZEND_STRL("name"), (char *) is.value, is.length);
-       }
-       int32_t iv;
-       if (IERR_OK == ion_symbol_table_get_version(obj->tab, &iv)) {
-               zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("version"), iv);
+       ION_SYMBOL_TABLE_TYPE typ = ist_EMPTY;
+       ion_symbol_table_get_type(obj->tab, &typ);
+       if (typ != ist_LOCAL) {
+               ION_STRING is;
+               if (IERR_OK == ion_symbol_table_get_name(obj->tab, &is)) {
+                       zend_update_property_stringl(obj->std.ce, &obj->std, ZEND_STRL("name"), (char *) is.value, is.length);
+               }
+               int32_t iv;
+               if (IERR_OK == ion_symbol_table_get_version(obj->tab, &iv)) {
+                       zend_update_property_long(obj->std.ce, &obj->std, ZEND_STRL("version"), iv);
+               }
        }
 }
 
-static inline void php_ion_symbol_table_dtor(php_ion_symbol_table *obj)
+LOCAL void php_ion_symbol_table_dtor(php_ion_symbol_table *obj)
 {
        if (obj->tab) {
                if (obj->dtor) {
@@ -551,7 +657,20 @@ static inline void php_ion_symbol_table_dtor(php_ion_symbol_table *obj)
        }
 }
 
-static inline void php_ion_symbol_table_import(php_ion_symbol_table *obj, php_ion_symbol_table *import)
+LOCAL void php_ion_symbol_table_copy(php_ion_symbol_table *new_obj, php_ion_symbol_table *old_obj)
+{
+       // do not clone cache members
+       // zend_objects_clone_members(...)
+       if ((new_obj->dtor = old_obj->dtor)) {
+               ION_CHECK(ion_symbol_table_clone_with_owner(old_obj->tab, &new_obj->tab, NULL));
+       } else {
+               new_obj->tab = old_obj->tab;
+       }
+       // update non-cache members
+       php_ion_symbol_table_ctor(new_obj);
+}
+
+LOCAL void php_ion_symbol_table_import(php_ion_symbol_table *obj, php_ion_symbol_table *import)
 {
        OBJ_CHECK(obj);
        OBJ_CHECK(import);
@@ -571,7 +690,7 @@ static inline void php_ion_symbol_table_import(php_ion_symbol_table *obj, php_io
        }
 }
 
-static inline void php_ion_symbol_table_symbol_zval(php_ion_symbol_table *obj, ION_SYMBOL *sym, zval *return_value)
+LOCAL void php_ion_symbol_table_symbol_zval(php_ion_symbol_table *obj, ION_SYMBOL *sym, zval *return_value)
 {
        zval tmp;
        zval *zsyms = zend_read_property(obj->std.ce, &obj->std, ZEND_STRL("symbols"), 0, &tmp);
@@ -591,7 +710,7 @@ static inline void php_ion_symbol_table_symbol_zval(php_ion_symbol_table *obj, I
        }
 }
 
-php_ion_decl(symbol_table, Symbol_Table, php_ion_symbol_table_dtor(obj));
+php_ion_decl(symbol_table, Symbol_Table);
 
 typedef struct php_ion_decimal_ctx {
        decContext ctx;
@@ -600,8 +719,8 @@ typedef struct 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)
+LOCAL void php_ion_decimal_ctx_init(decContext *ctx,
+               int digits, int emax, int emin, enum rounding round, zend_bool clamp)
 {
        memset(ctx, 0, sizeof(*ctx));
        ctx->digits = digits;
@@ -611,7 +730,7 @@ static inline void php_ion_decimal_ctx_init(decContext *ctx,
        ctx->clamp = clamp;
 }
 
-static inline void php_ion_decimal_ctx_ctor(php_ion_decimal_ctx *obj, zend_object *o_round)
+LOCAL 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);
@@ -627,6 +746,16 @@ static inline void php_ion_decimal_ctx_ctor(php_ion_decimal_ctx *obj, zend_objec
        zend_update_property_bool(obj->std.ce, &obj->std, ZEND_STRL("clamp"), obj->ctx.clamp);
 }
 
+LOCAL void php_ion_decimal_ctx_dtor(php_ion_decimal_ctx *obj)
+{
+}
+
+LOCAL void php_ion_decimal_ctx_copy(php_ion_decimal_ctx *new_obj, php_ion_decimal_ctx *old_obj)
+{
+       zend_objects_clone_members(&new_obj->std, &old_obj->std);
+       new_obj->ctx = old_obj->ctx;
+}
+
 php_ion_decl(decimal_ctx, Decimal_Context);
 
 typedef struct php_ion_decimal {
@@ -634,7 +763,7 @@ typedef struct php_ion_decimal {
        zend_object *ctx, std;
 } php_ion_decimal;
 
-static inline void php_ion_decimal_from_zend_long(ION_DECIMAL *dec, decContext *ctx, zend_long num)
+LOCAL void php_ion_decimal_from_zend_long(ION_DECIMAL *dec, decContext *ctx, zend_long num)
 {
        if (num <= INT32_MAX && num >= INT32_MIN) {
                ION_CHECK(ion_decimal_from_int32(dec, num));
@@ -653,14 +782,14 @@ static inline void php_ion_decimal_from_zend_long(ION_DECIMAL *dec, decContext *
        }
 }
 
-static inline zend_string *php_ion_decimal_to_string(ION_DECIMAL *dec)
+LOCAL zend_string *php_ion_decimal_to_string(ION_DECIMAL *dec)
 {
        zend_string *zstr = zend_string_alloc(ION_DECIMAL_STRLEN(dec), 0);
        (void) ion_decimal_to_string(dec, zstr->val);
        return zend_string_truncate(zstr, strlen(zstr->val), 0);
 }
 
-static inline void php_ion_decimal_to_zend_long(ION_DECIMAL *dec, decContext *ctx, zend_long *l)
+LOCAL void php_ion_decimal_to_zend_long(ION_DECIMAL *dec, decContext *ctx, zend_long *l)
 {
        ION_INT *ii = NULL;
        ION_CHECK(ion_int_alloc(NULL, &ii));
@@ -671,7 +800,7 @@ static inline void php_ion_decimal_to_zend_long(ION_DECIMAL *dec, decContext *ct
        ion_int_free(ii);
 }
 
-static inline bool php_ion_decimal_fits_zend_long(php_ion_decimal *obj)
+LOCAL bool php_ion_decimal_fits_zend_long(php_ion_decimal *obj)
 {
        int32_t result;
 
@@ -692,7 +821,7 @@ static inline bool php_ion_decimal_fits_zend_long(php_ion_decimal *obj)
        return true;
 }
 
-static inline void php_ion_decimal_ctor(php_ion_decimal *obj)
+LOCAL void php_ion_decimal_ctor(php_ion_decimal *obj)
 {
        if (!obj->ctx) {
                zval zdc;
@@ -714,16 +843,23 @@ static inline void php_ion_decimal_ctor(php_ion_decimal *obj)
        }
 }
 
-static inline void php_ion_decimal_dtor(php_ion_decimal *obj)
+LOCAL void php_ion_decimal_dtor(php_ion_decimal *obj)
 {
        ion_decimal_free(&obj->dec);
 }
 
-php_ion_decl(decimal, Decimal, php_ion_decimal_dtor(obj));
+LOCAL void php_ion_decimal_copy(php_ion_decimal *new_obj, php_ion_decimal *old_obj)
+{
+       zend_objects_clone_members(&new_obj->std, &old_obj->std);
+       new_obj->ctx = old_obj->ctx;
+       ION_CHECK(ion_decimal_copy(&new_obj->dec, &old_obj->dec));
+}
+
+php_ion_decl(decimal, Decimal);
 
 typedef php_date_obj php_ion_timestamp;
 
-static inline zend_long php_usec_from_ion(const decQuad *frac, decContext *ctx)
+LOCAL zend_long php_usec_from_ion(const decQuad *frac, decContext *ctx)
 {
        if (!ctx) {
                ctx = &php_ion_globals.decimal.ctx;
@@ -733,7 +869,7 @@ static inline zend_long php_usec_from_ion(const decQuad *frac, decContext *ctx)
        return (zend_long) decQuadToUInt32(&result, ctx, DEC_ROUND_HALF_EVEN);
 }
 
-static inline decQuad *ion_ts_frac_from_usec(decQuad *frac, zend_long usec, decContext *ctx)
+LOCAL decQuad *ion_ts_frac_from_usec(decQuad *frac, int usec, decContext *ctx)
 {
        if (!ctx) {
                ctx = &php_ion_globals.decimal.ctx;
@@ -742,33 +878,47 @@ 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(int precision)
+LOCAL zend_string *php_ion_timestamp_format_fetch(zend_string *fmt_case)
 {
-       switch (precision & 0x7f) {
+       return Z_STR_P(zend_enum_fetch_case_value(zend_enum_get_case(ce_Timestamp_Format, fmt_case)));
+}
+
+LOCAL zend_string *php_dt_format_from_precision(uint8_t precision)
+{
+       switch (precision) {
+       case ION_TS_FRAC | 0x80:
+               return php_ion_timestamp_format_fetch(g_intern_str.FracTZ);
        case ION_TS_FRAC:
-               return zend_string_init(ZEND_STRL("c"), 0);
+               return php_ion_timestamp_format_fetch(g_intern_str.Frac);
+       case ION_TS_SEC | 0x80:
+               return php_ion_timestamp_format_fetch(g_intern_str.SecTZ);
        case ION_TS_SEC:
-               return zend_string_init(ZEND_STRL("Y-m-d\\TH:i:sP"), 0);
+               return php_ion_timestamp_format_fetch(g_intern_str.Sec);
+       case ION_TS_MIN | 0x80:
+               return php_ion_timestamp_format_fetch(g_intern_str.MinTZ);
        case ION_TS_MIN:
-               return zend_string_init(ZEND_STRL("Y-m-d\\TH:iP"), 0);
+               return php_ion_timestamp_format_fetch(g_intern_str.Min);
        case ION_TS_DAY:
-               return zend_string_init(ZEND_STRL("Y-m-d\\T"), 0);
+               return php_ion_timestamp_format_fetch(g_intern_str.Day);
        case ION_TS_MONTH:
-               return zend_string_init(ZEND_STRL("Y-m\\T"), 0);
+               return php_ion_timestamp_format_fetch(g_intern_str.Month);
        case ION_TS_YEAR:
-               return zend_string_init(ZEND_STRL("Y\\T"), 0);
+               return php_ion_timestamp_format_fetch(g_intern_str.Year);
        default:
-               return zend_string_init(ZEND_STRL("c"), 0);
+               return ZSTR_CHAR('c');
        }
 }
 
-static inline timelib_time* php_time_from_ion(const ION_TIMESTAMP *ts, decContext *ctx, zend_string **fmt)
+LOCAL timelib_time* php_time_from_ion(const ION_TIMESTAMP *ts, decContext *ctx, zend_string **fmt)
 {
-       timelib_time *time = timelib_time_ctor();
+       timelib_time *time = ecalloc(1, sizeof(*time));
 
-       int precision = ION_TS_FRAC;
-       ion_timestamp_get_precision(ts,  &precision);
-       switch (precision) {
+       /* defaults */
+       time->y = 1970;
+       time->m = 1;
+       time->d = 1;
+
+       switch (ts->precision & 0x7f) {
        case ION_TS_FRAC:
                time->us = php_usec_from_ion(&ts->fraction, ctx);
                /* fallthrough */
@@ -790,7 +940,7 @@ static inline timelib_time* php_time_from_ion(const ION_TIMESTAMP *ts, decContex
                /* fallthrough */
        default:
                time->z = ts->tz_offset * 60;
-               if (time->z) {
+               if (time->z || ts->precision & 0x80) {
                        time->zone_type = TIMELIB_ZONETYPE_OFFSET;
                } else {
                        time->zone_type = TIMELIB_ZONETYPE_ID;
@@ -799,24 +949,24 @@ static inline timelib_time* php_time_from_ion(const ION_TIMESTAMP *ts, decContex
        }
 
        if (fmt) {
-               *fmt = php_dt_format_from_precision(precision);
+               *fmt = php_dt_format_from_precision(ts->precision);
        }
        return time;
 }
 
-static inline ION_TIMESTAMP *ion_timestamp_from_php(ION_TIMESTAMP *buf, php_ion_timestamp *ts, decContext *ctx)
+LOCAL ION_TIMESTAMP *ion_timestamp_from_php(ION_TIMESTAMP *buf, php_ion_timestamp *ts, decContext *ctx)
 {
        memset(buf, 0, sizeof(*buf));
 
        zval tmp;
        int precision = Z_LVAL_P(zend_read_property(ts->std.ce, &ts->std, ZEND_STRL("precision"), 0, &tmp));
 
-       if (!precision || precision > ION_TS_FRAC) {
+       if (!precision || precision > (ION_TS_FRAC|0x80)) {
                zend_throw_exception_ex(spl_ce_InvalidArgumentException, IERR_INVALID_ARG,
                                "Invalid precision (%d) of ion\\Timestamp", precision);
-       } else switch ((buf->precision = precision)) {
+       } else switch ((buf->precision = precision) & 0x7f) {
        case ION_TS_FRAC:
-               ion_ts_frac_from_usec(&buf->fraction, ts->time->us, ctx);
+               ion_ts_frac_from_usec(&buf->fraction, (int) ts->time->us, ctx);
                /* fallthrough */
        case ION_TS_SEC:
                buf->seconds = ts->time->s;
@@ -835,7 +985,7 @@ static inline ION_TIMESTAMP *ion_timestamp_from_php(ION_TIMESTAMP *buf, php_ion_
                buf->year = ts->time->y;
                /* fallthrough */
        default:
-               buf->tz_offset = ts->time->z / 60;
+               buf->tz_offset = (short) (ts->time->z / 60);
                if (buf->tz_offset) {
                        buf->precision |= 0x80;
                }
@@ -844,7 +994,7 @@ 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)
+LOCAL 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);
@@ -861,19 +1011,54 @@ typedef struct php_ion_catalog {
        zend_object std;
 } php_ion_catalog;
 
-static inline void php_ion_catalog_ctor(php_ion_catalog *obj)
+LOCAL void php_ion_catalog_ctor(php_ion_catalog *obj)
 {
        ION_CHECK(ion_catalog_open(&obj->cat));
 }
 
-static inline void php_ion_catalog_dtor(php_ion_catalog *obj)
+LOCAL void php_ion_catalog_dtor(php_ion_catalog *obj)
 {
        if (obj->cat) {
                ion_catalog_close(obj->cat);
        }
 }
 
-static inline zend_string *ion_symbol_table_to_key(ION_SYMBOL_TABLE *tab)
+LOCAL ION_COLLECTION *php_ion_catalog_collection(php_ion_catalog *cat)
+{
+       /* do not look too close */
+       struct {
+               void *owner;
+               ION_SYMBOL_TABLE *sys;
+               ION_COLLECTION collection;
+       } *cat_ptr = (void *) cat->cat;
+       return &cat_ptr->collection;
+}
+// see https://github.com/amzn/ion-c/issues/269
+#ifndef IPCN_pNODE_TO_pDATA
+# define IPCN_pNODE_TO_pDATA(x)    (&((x)->_data[0]))
+#endif
+
+LOCAL void php_ion_catalog_copy(php_ion_catalog *new_obj, php_ion_catalog *old_obj)
+{
+       // do not clone cache members
+       php_ion_catalog_ctor(new_obj);
+       OBJ_CHECK(new_obj);
+
+       ION_COLLECTION *col = php_ion_catalog_collection(old_obj);
+       if (!ION_COLLECTION_IS_EMPTY(col)) {
+               ION_COLLECTION_CURSOR cur;
+               ION_COLLECTION_OPEN(col, cur);
+               while (cur) {
+                       ION_SYMBOL_TABLE **ptr;
+                       ION_COLLECTION_NEXT(cur, ptr);
+                       if (*ptr) {
+                               ION_CHECK(ion_catalog_add_symbol_table(new_obj->cat, *ptr));
+                       }
+               }
+       }
+}
+
+LOCAL zend_string *ion_symbol_table_to_key(ION_SYMBOL_TABLE *tab)
 {
        int32_t version;
        ION_STRING is;
@@ -889,7 +1074,7 @@ static inline zend_string *ion_symbol_table_to_key(ION_SYMBOL_TABLE *tab)
        return s.s;
 }
 
-static inline void php_ion_catalog_add_symbol_table(php_ion_catalog *obj, php_ion_symbol_table *tab)
+LOCAL void php_ion_catalog_add_symbol_table(php_ion_catalog *obj, php_ion_symbol_table *tab)
 {
        OBJ_CHECK(obj);
        OBJ_CHECK(tab);
@@ -915,7 +1100,7 @@ static inline void php_ion_catalog_add_symbol_table(php_ion_catalog *obj, php_io
        }
 }
 
-static inline void php_ion_catalog_symbol_table_zval(php_ion_catalog *obj, ION_SYMBOL_TABLE *tab, zval *return_value)
+LOCAL void php_ion_catalog_symbol_table_zval(php_ion_catalog *obj, ION_SYMBOL_TABLE *tab, zval *return_value)
 {
        zend_string *key = ion_symbol_table_to_key(tab);
        PTR_CHECK(key);
@@ -927,16 +1112,12 @@ static inline void php_ion_catalog_symbol_table_zval(php_ion_catalog *obj, ION_S
                if (ztab) {
                        zend_string_release(key);
                        RETURN_COPY(ztab);
-               } else {
-                       fprintf(stderr, "FAIL\n");
                }
        }
 
-       php_error_docref(NULL, E_NOTICE, "Previously unknown ion\\Symbol\\Table encountered: %s", key->val);
-
        object_init_ex(return_value, ce_Symbol_Table_Shared);
        php_ion_symbol_table *o_tab = php_ion_obj(symbol_table, Z_OBJ_P(return_value));
-       OBJ_CHECK(o_tab, zend_string_release(key));
+       o_tab->tab = tab;
        php_ion_symbol_table_ctor(o_tab);
 
        if (ztabs) {
@@ -949,15 +1130,52 @@ static inline void php_ion_catalog_symbol_table_zval(php_ion_catalog *obj, ION_S
        zend_string_release(key);
 }
 
-php_ion_decl(catalog, Catalog, php_ion_catalog_dtor(obj));
+php_ion_decl(catalog, Catalog);
+
+typedef struct php_ion_reader_options_ccn_ctx {
+       zend_object *obj;
+       zend_fcall_info fci;
+       zend_fcall_info_cache fcc;
+} php_ion_reader_options_ccn_ctx;
 
 typedef struct php_ion_reader_options {
        ION_READER_OPTIONS opt;
+       php_ion_reader_options_ccn_ctx ccn;
        zend_object *cat, *dec_ctx, *cb, std;
 } php_ion_reader_options;
 
+LOCAL void php_ion_reader_options_dtor(php_ion_reader_options *obj)
+{
+       if (obj->cb) {
+               zend_fcall_info_args_clear(&obj->ccn.fci, true);
+       }
+}
+
+LOCAL void php_ion_reader_options_copy(php_ion_reader_options *new_obj, php_ion_reader_options *old_obj)
+{
+       zend_objects_clone_members(&new_obj->std, &old_obj->std);
+
+       new_obj->opt = old_obj->opt;
+       new_obj->cat = old_obj->cat;
+       new_obj->dec_ctx = old_obj->dec_ctx;
+       new_obj->cb = old_obj->cb;
+       if (new_obj->cb) {
+               zval zcb;
+               ZVAL_OBJ(&zcb, new_obj->cb);
+               zend_fcall_info_init(&zcb, 0, &new_obj->ccn.fci, &new_obj->ccn.fcc, NULL, NULL);
+               new_obj->opt.context_change_notifier.context = &new_obj->ccn;
+       }
+}
+
 php_ion_decl(reader_options, Reader_Options);
 
+LOCAL zend_object *php_ion_reader_options_new(void)
+{
+       zend_object *obj = create_ion_Reader_Options(NULL);
+       zend_call_known_instance_method_with_0_params(obj->ce->constructor, obj, NULL);
+       return obj;
+}
+
 typedef struct php_ion_reader {
        ION_READER *reader;
        ION_TYPE state;
@@ -975,7 +1193,7 @@ typedef struct php_ion_reader {
        zend_object *opt, std;
 } php_ion_reader;
 
-static inline iERR php_ion_reader_stream_handler(struct _ion_user_stream *user)
+LOCAL 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;
@@ -1001,49 +1219,51 @@ static inline iERR php_ion_reader_stream_handler(struct _ion_user_stream *user)
        return IERR_READ_ERROR;
 }
 
-static inline iERR on_context_change(void *context, ION_COLLECTION *imports)
+LOCAL iERR on_context_change(void *context, ION_COLLECTION *imports)
 {
+       iERR e = IERR_OK;
+
        if (context) {
-               php_ion_reader *obj = php_ion_obj(reader, context);
-               (void) obj;
+               php_ion_reader_options_ccn_ctx *ctx = context;
+
+               zval zobj;
+               ZVAL_OBJ(&zobj, ctx->obj);
+               zend_fcall_info_argn(&ctx->fci, 1, &zobj);
+               if (SUCCESS != zend_fcall_info_call(&ctx->fci, &ctx->fcc, NULL, NULL)) {
+                       e = IERR_INTERNAL_ERROR;
+               }
+               zend_fcall_info_args_clear(&ctx->fci, false);
        }
-       return IERR_OK;
+       return e;
 }
 
-static ION_READER_CONTEXT_CHANGE_NOTIFIER EMPTY_READER_CHANGE_NOTIFIER = {
-       on_context_change,
-       NULL
-};
-
-static inline void php_ion_reader_ctor(php_ion_reader *obj)
+LOCAL void php_ion_reader_ctor(php_ion_reader *obj)
 {
        iERR err;
        php_ion_reader_options *opt = php_ion_obj(reader_options, obj->opt);
 
-       if (opt) {
-               opt->opt.context_change_notifier.context = obj;
+       if (opt && opt->opt.context_change_notifier.context) {
+               php_ion_reader_options_ccn_ctx *ctx = opt->opt.context_change_notifier.context;
+               ctx->obj = &obj->std;
+               opt->opt.context_change_notifier.notify = on_context_change;
        }
        if (obj->type == STREAM_READER) {
                PTR_CHECK(obj->stream.ptr);
                GC_ADDREF(obj->stream.ptr->res);
 
-               obj->stream.buf.length = opt && opt->opt.allocation_page_size ? opt->opt.allocation_page_size : 0x10000;
+               obj->stream.buf.length = opt && opt->opt.chunk_threshold ? opt->opt.chunk_threshold : 0x4000;
                obj->stream.buf.value = emalloc(obj->stream.buf.length);
                err = ion_reader_open_stream(&obj->reader, obj, php_ion_reader_stream_handler, opt ? &opt->opt : NULL);
 
        } else {
-               err = ion_reader_open_buffer(&obj->reader,
-                               (BYTE *) obj->buffer->val, obj->buffer->len,
-                               opt ? &opt->opt : NULL);
-       }
-       if (opt) {
-               opt->opt.context_change_notifier.context = NULL;
+               err = ion_reader_open_buffer(&obj->reader, (BYTE *) obj->buffer->val, (SIZE) obj->buffer->len, opt ? &opt->opt : NULL);
        }
 
        ION_CHECK(err);
        OBJ_CHECK(obj);
 }
-static inline void php_ion_reader_dtor(php_ion_reader *obj)
+
+LOCAL void php_ion_reader_dtor(php_ion_reader *obj)
 {
        if (obj->reader) {
                ion_reader_close(obj->reader);
@@ -1062,15 +1282,37 @@ static inline void php_ion_reader_dtor(php_ion_reader *obj)
        }
 }
 
-php_ion_decl(reader, Reader_Reader, php_ion_reader_dtor(obj));
+#define php_ion_reader_copy(n,o)
+php_ion_decl(reader, Reader_Reader);
+#define clone_ion_Reader_Reader NULL
 
 typedef struct php_ion_writer_options {
        ION_WRITER_OPTIONS opt;
-       zend_object *cat, *dec_ctx, *col, std;
+       zend_object *cat, *dec_ctx, std;
 } php_ion_writer_options;
 
+LOCAL void php_ion_writer_options_copy(php_ion_writer_options *new_obj, php_ion_writer_options *old_obj)
+{
+       zend_objects_clone_members(&new_obj->std, &old_obj->std);
+
+       new_obj->opt = old_obj->opt;
+       new_obj->cat = old_obj->cat;
+       new_obj->dec_ctx = old_obj->dec_ctx;
+}
+
+LOCAL void php_ion_writer_options_dtor(php_ion_writer_options *obj)
+{
+}
+
 php_ion_decl(writer_options, Writer_Options);
 
+LOCAL zend_object *php_ion_writer_options_new(void)
+{
+       zend_object *obj = create_ion_Writer_Options(NULL);
+       zend_call_known_instance_method_with_0_params(obj->ce->constructor, obj, NULL);
+       return obj;
+}
+
 typedef struct php_ion_writer {
        ION_WRITER *writer;
        enum {
@@ -1079,8 +1321,8 @@ typedef struct php_ion_writer {
        } type;
        union {
                struct {
-                       zval val;
                        smart_str str;
+                       struct _ion_user_stream *usr;
                } buffer;
                struct {
                        ION_STRING buf;
@@ -1091,7 +1333,7 @@ typedef struct php_ion_writer {
 
 } php_ion_writer;
 
-static inline iERR php_ion_writer_stream_handler(struct _ion_user_stream *user)
+LOCAL iERR php_ion_writer_stream_handler(struct _ion_user_stream *user)
 {
        php_ion_writer *writer = (php_ion_writer *) user->handler_state;
 
@@ -1106,92 +1348,117 @@ static inline iERR php_ion_writer_stream_handler(struct _ion_user_stream *user)
        return IERR_OK;
 }
 
-#define REF_STR() do { \
-       ZVAL_NEW_STR(ref, obj->buffer.str.s); \
-       GC_ADDREF(obj->buffer.str.s); \
-} while (0)
-
-#define NEW_REF_STR() do {\
-       if (Z_STR_P(ref) != obj->buffer.str.s) { \
-               zval_ptr_dtor(ref); \
-               REF_STR(); \
-       } \
-} while(0)
-
-static inline void php_ion_writer_stream_init(php_ion_writer *obj, php_ion_writer_options *opt)
+LOCAL void php_ion_writer_stream_init(php_ion_writer *obj, php_ion_writer_options *opt)
 {
        PTR_CHECK(obj->stream.ptr);
        GC_ADDREF(obj->stream.ptr->res);
 
-       obj->stream.buf.length = opt ? opt->opt.allocation_page_size : 0x1000;
+       obj->stream.buf.length = opt ? opt->opt.temp_buffer_size : 0x1000;
        obj->stream.buf.value = emalloc(obj->stream.buf.length);
 }
-static inline void php_ion_writer_buffer_init(php_ion_writer *obj)
+
+LOCAL void php_ion_writer_buffer_offer(php_ion_writer *obj)
+{
+       if (obj->buffer.usr) {
+               obj->buffer.usr->curr = (BYTE *) &obj->buffer.str.s->val[obj->buffer.str.s->len];
+               obj->buffer.usr->limit = obj->buffer.usr->curr + obj->buffer.str.a - obj->buffer.str.s->len;
+       }
+}
+
+LOCAL void php_ion_writer_buffer_init(php_ion_writer *obj)
+{
+       smart_str_alloc(&obj->buffer.str, 0, false);
+       php_ion_writer_buffer_offer(obj);
+}
+
+LOCAL void php_ion_writer_buffer_reset(php_ion_writer *obj)
 {
-       zval *ref = &obj->buffer.val;
-       ZVAL_DEREF(ref);
+       smart_str_free(&obj->buffer.str);
+       memset(&obj->buffer.str, 0, sizeof(obj->buffer.str));
+       php_ion_writer_buffer_init(obj);
+}
 
-       smart_str_alloc(&obj->buffer.str, 0, 0);
+LOCAL zend_string *php_ion_writer_buffer_copy(php_ion_writer *obj)
+{
+       if (obj->buffer.usr) {
+               // ensure that brain-dead ion_stream interface calls us again
+               obj->buffer.usr->curr = NULL;
+               obj->buffer.usr->limit = NULL;
+       }
        smart_str_0(&obj->buffer.str);
-       REF_STR();
+       return zend_string_copy(obj->buffer.str.s);
 }
 
-static inline void php_ion_writer_buffer_grow(php_ion_writer *obj)
+LOCAL void php_ion_writer_buffer_separate(php_ion_writer *obj, bool grow)
 {
-       zval *ref = &obj->buffer.val;
-       ZVAL_DEREF(ref);
+       // see zend_string_separate and smart_str_erealloc
+       zend_string *old_str = obj->buffer.str.s;
+       zend_string *new_str = zend_string_alloc(obj->buffer.str.a << grow, false);
+       memcpy(new_str->val, old_str->val, new_str->len = old_str->len);
+       zend_string_release(old_str);
+       obj->buffer.str.s = new_str;
+}
 
-       switch (GC_REFCOUNT(obj->buffer.str.s)) {
-       case 2:
-               // nothing to do
-               break;
-       case 1:
-               // we've been separated
-               GC_ADDREF(obj->buffer.str.s);
-               break;
-       default:
-               // we have to separate
-               fprintf(stderr, "SEPARATE\n");
-               obj->buffer.str.s = zend_string_dup(obj->buffer.str.s, 0);
-               break;
+LOCAL void php_ion_writer_buffer_grow(php_ion_writer *obj)
+{
+       if (obj->buffer.usr && obj->buffer.usr->curr) {
+               obj->buffer.str.s->len = obj->buffer.usr->curr - (BYTE *) obj->buffer.str.s->val;
        }
-
-       zend_string *old = obj->buffer.str.s;
-       GC_DELREF(old);
-       smart_str_erealloc(&obj->buffer.str, obj->buffer.str.a << 1);
-       if (old == obj->buffer.str.s) {
-               GC_ADDREF(old);
-       } else if(old == Z_STR_P(ref)) {
-               ZVAL_NULL(ref);
+       if (obj->buffer.usr && obj->buffer.usr->curr && obj->buffer.usr->curr == obj->buffer.usr->limit) {
+               if (UNEXPECTED(GC_REFCOUNT(obj->buffer.str.s) > 1)) {
+                       php_ion_writer_buffer_separate(obj, true);
+               } else {
+                       smart_str_erealloc(&obj->buffer.str, obj->buffer.str.a << 1);
+               }
+       } else if (UNEXPECTED(GC_REFCOUNT(obj->buffer.str.s) > 1)) {
+               php_ion_writer_buffer_separate(obj, false);
        }
-
-       NEW_REF_STR();
+       php_ion_writer_buffer_offer(obj);
 }
 
-static inline iERR php_ion_writer_buffer_handler(struct _ion_user_stream *user)
+
+LOCAL iERR php_ion_writer_buffer_handler(struct _ion_user_stream *user)
 {
        php_ion_writer *writer = (php_ion_writer *) user->handler_state;
+       writer->buffer.usr = user;
+       php_ion_writer_buffer_grow(writer);
+       return IERR_OK;
+}
 
-       if (user->curr) {
-               writer->buffer.str.s->len += user->curr - (BYTE *) &writer->buffer.str.s->val[writer->buffer.str.s->len];
-               smart_str_0(&writer->buffer.str);
-               if (user->limit == user->curr) {
-                       php_ion_writer_buffer_grow(writer);
+LOCAL void php_ion_writer_options_init_shared_imports(php_ion_writer_options *opt)
+{
+       php_ion_catalog *cat = php_ion_obj(catalog, opt->cat);
+       OBJ_CHECK(cat);
+
+       ION_CHECK(ion_writer_options_initialize_shared_imports(&opt->opt));
+
+       ION_COLLECTION *col = php_ion_catalog_collection(cat);
+       if (!ION_COLLECTION_IS_EMPTY(col)) {
+               // holy, nah, forget it batman...
+               ION_COLLECTION_CURSOR cur;
+               ION_COLLECTION_OPEN(col, cur);
+               while (cur) {
+                       ION_SYMBOL_TABLE **ptr;
+                       ION_COLLECTION_NEXT(cur, ptr);
+                       if (*ptr) {
+                               ION_CHECK(ion_writer_options_add_shared_imports_symbol_tables(&opt->opt, ptr, 1));
+                       }
                }
        }
-       user->curr = (BYTE *) &writer->buffer.str.s->val[writer->buffer.str.s->len];
-       user->limit = user->curr + writer->buffer.str.a - writer->buffer.str.s->len;
-
-       return IERR_OK;
 }
 
-static inline void php_ion_writer_ctor(php_ion_writer *obj)
+LOCAL void php_ion_writer_ctor(php_ion_writer *obj)
 {
+       php_ion_writer_options *opt = NULL;
+
        if (obj->opt) {
                update_property_obj(&obj->std, ZEND_STRL("options"), obj->opt);
+               opt = php_ion_obj(writer_options, obj->opt);
+               if (opt->cat) {
+                       php_ion_writer_options_init_shared_imports(opt);
+               }
        }
 
-       php_ion_writer_options *opt = php_ion_obj(writer_options, obj->opt);
        ION_STREAM_HANDLER h;
        if (obj->type == STREAM_WRITER) {
                h = php_ion_writer_stream_handler;
@@ -1201,15 +1468,22 @@ static inline void php_ion_writer_ctor(php_ion_writer *obj)
                php_ion_writer_buffer_init(obj);
        }
 
+
        ION_CHECK(ion_writer_open_stream(&obj->writer, h, obj, opt ? &opt->opt : NULL));
        OBJ_CHECK(obj);
 }
 
-static inline void php_ion_writer_dtor(php_ion_writer *obj)
+LOCAL void php_ion_writer_dtor(php_ion_writer *obj)
 {
        if (obj->writer) {
                ion_writer_close(obj->writer);
        }
+       if (obj->opt) {
+               php_ion_writer_options *opt = php_ion_obj(writer_options, obj->opt);
+               if (opt->cat) {
+                       ion_writer_options_close_shared_imports(&opt->opt);
+               }
+       }
        if (obj->type == STREAM_WRITER) {
                if (obj->stream.buf.value) {
                        efree(obj->stream.buf.value);
@@ -1222,23 +1496,26 @@ static inline void php_ion_writer_dtor(php_ion_writer *obj)
                        smart_str_0(&obj->buffer.str);
                        zend_string_release(obj->buffer.str.s);
                }
-               zval_ptr_dtor(&obj->buffer.val);
        }
 }
 
-php_ion_decl(writer, Writer_Writer, php_ion_writer_dtor(obj));
+#define php_ion_writer_copy(o,n)
+php_ion_decl(writer, Writer_Writer);
+#define clone_ion_Writer_Writer NULL
 
 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)
+LOCAL 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("multiSequence"),
+                       ser_obj->serializer.multi_seq);
        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) {
@@ -1249,7 +1526,7 @@ static inline void php_ion_serializer_php_ctor(php_ion_serializer_php *ser_obj)
                zend_update_property_null(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomSerialize"));
        }
        if (!ser_obj->opt) {
-               ser_obj->opt = create_ion_Writer_Options(NULL);
+               ser_obj->opt = php_ion_writer_options_new();
        } else {
                GC_ADDREF(ser_obj->opt);
        }
@@ -1258,16 +1535,16 @@ static inline void php_ion_serializer_php_ctor(php_ion_serializer_php *ser_obj)
        GC_DELREF(ser_obj->opt);
 }
 
-static inline void php_ion_serializer_php_dtor(php_ion_serializer_php *obj)
+LOCAL 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_serializer *, zval *);
+LOCAL void php_ion_serialize_zval(php_ion_serializer *, zval *);
 
-static inline void php_ion_serialize_struct(php_ion_serializer *ser, zend_array *arr, bool props)
+LOCAL void php_ion_serialize_struct(php_ion_serializer *ser, zend_array *arr, bool unmangle_props, bool annotate_props)
 {
        ION_CHECK(ion_writer_start_container(ser->writer, tid_STRUCT));
 
@@ -1275,22 +1552,25 @@ static inline void php_ion_serialize_struct(php_ion_serializer *ser, zend_array
        zend_ulong h;
        zend_string *k = NULL;
        if (arr) ZEND_HASH_FOREACH_KEY_VAL_IND(arr, h, k, v)
+               char buf[MAX_LENGTH_OF_LONG + 1];
                ION_STRING is;
                if (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)));
+                       if (unmangle_props && (SUCCESS == zend_unmangle_property_name_ex(k, &class_name, &prop_name, &prop_len)) && class_name) {
+                               if (annotate_props) {
+                                       ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_PROPERTY));
+                                       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_string_assign_cstr(&is, (char *) prop_name, prop_len);
+                       ion_string_assign_cstr(&is, (char *) prop_name, (SIZE) prop_len);
                } else {
-                       char buf[MAX_LENGTH_OF_LONG + 1], *end = buf + sizeof(buf) - 1;
+                       char *end = buf + sizeof(buf) - 1;
                        char *ptr = zend_print_long_to_buf(end, (zend_long) h);
-                       ion_string_assign_cstr(&is, ptr, end - ptr);
+                       ion_string_assign_cstr(&is, ptr, (SIZE) (end - ptr));
                }
 
                // WATCH OUT: field names need to be copied
@@ -1305,7 +1585,7 @@ static inline void php_ion_serialize_struct(php_ion_serializer *ser, zend_array
        ION_CHECK(ion_writer_finish_container(ser->writer));
 }
 
-static inline void php_ion_serialize_list(php_ion_serializer *ser, zend_array *arr)
+LOCAL void php_ion_serialize_list(php_ion_serializer *ser, zend_array *arr)
 {
        ION_CHECK(ion_writer_start_container(ser->writer, tid_LIST));
 
@@ -1318,16 +1598,16 @@ static inline void php_ion_serialize_list(php_ion_serializer *ser, zend_array *a
        ION_CHECK(ion_writer_finish_container(ser->writer));
 }
 
-static inline void php_ion_serialize_array(php_ion_serializer *ser, zend_array *arr)
+LOCAL void php_ion_serialize_array(php_ion_serializer *ser, zend_array *arr)
 {
        if (zend_array_is_list(arr)) {
                php_ion_serialize_list(ser, arr);
        } else {
-               php_ion_serialize_struct(ser, arr, false);
+               php_ion_serialize_struct(ser, arr, false, false);
        }
 }
 
-static inline void php_ion_serialize_object_iface(php_ion_serializer *ser, zend_object *zobject)
+LOCAL void php_ion_serialize_object_iface(php_ion_serializer *ser, zend_object *zobject)
 {
        uint8_t *buf;
        size_t len;
@@ -1336,9 +1616,9 @@ static inline void php_ion_serialize_object_iface(php_ion_serializer *ser, zend_
        ZVAL_OBJ(&tmp, zobject);
        if (SUCCESS == zobject->ce->serialize(&tmp, &buf, &len, NULL)) {
                ION_STRING is;
-               ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("S"))));
+               ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_SERIALIZEABLE));
                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)));
+               ION_CHECK(ion_writer_write_clob(ser->writer, buf, len));
                efree(buf);
        } else if (!EG(exception)){
                zend_throw_exception_ex(spl_ce_UnexpectedValueException, IERR_INTERNAL_ERROR,
@@ -1346,7 +1626,7 @@ static inline void php_ion_serialize_object_iface(php_ion_serializer *ser, zend_
        }
 }
 
-static inline void php_ion_serialize_object_magic(php_ion_serializer *ser, zend_object *zobject, zend_function *fn)
+LOCAL void php_ion_serialize_object_magic(php_ion_serializer *ser, zend_object *zobject, zend_function *fn)
 {
        zval rv;
 
@@ -1356,7 +1636,7 @@ static inline void php_ion_serialize_object_magic(php_ion_serializer *ser, zend_
 
        if (IS_ARRAY == Z_TYPE(rv)) {
                ION_STRING is;
-               ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, fn ? "C" : "O", 1)));
+               ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, fn ? &PHP_ION_SYMBOL_CUSTOM_OBJECT : &PHP_ION_SYMBOL_MAGIC_OBJECT));
                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);
@@ -1368,32 +1648,32 @@ static inline void php_ion_serialize_object_magic(php_ion_serializer *ser, zend_
        }
 }
 
-static inline void php_ion_serialize_object_enum(php_ion_serializer *ser, zend_object *zobject)
+LOCAL void php_ion_serialize_object_enum(php_ion_serializer *ser, zend_object *zobject)
 {
        ION_STRING is;
-       ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("E"))));
+       ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_ENUM));
 
        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_serializer *ser, zend_object *zobject)
+LOCAL void php_ion_serialize_object_std(php_ion_serializer *ser, zend_object *zobject)
 {
        ION_STRING is;
 
        if (zobject->ce != zend_standard_class_def) {
-               ION_CHECK(ion_writer_add_annotation(ser->writer, ion_string_assign_cstr(&is, ZEND_STRL("c"))));
+               ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_CLASS_OBJECT));
                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"))));
+               ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_OBJECT));
        }
 
        zval zobj;
        ZVAL_OBJ(&zobj, zobject);
        HashTable *props = zend_get_properties_for(&zobj, ZEND_PROP_PURPOSE_SERIALIZE);
        if (props) {
-               php_ion_serialize_struct(ser, props, true);
+               php_ion_serialize_struct(ser, props, true, true);
                zend_release_properties(props);
        } else {
                zend_throw_exception_ex(spl_ce_UnexpectedValueException, IERR_INTERNAL_ERROR,
@@ -1402,10 +1682,10 @@ static inline void php_ion_serialize_object_std(php_ion_serializer *ser, zend_ob
        }
 }
 
-static inline void php_ion_serialize_object_lob(php_ion_serializer *ser, zend_object *zobject)
+LOCAL void php_ion_serialize_object_lob(php_ion_serializer *ser, zend_object *zobject)
 {
-       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);
+       zval tmp_type, *type = zend_read_property_ex(NULL, zobject, ZSTR_KNOWN(ZEND_STR_TYPE), 0, &tmp_type);
+       zval tmp_value, *value = zend_read_property_ex(NULL, zobject, ZSTR_KNOWN(ZEND_STR_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)));
@@ -1420,25 +1700,26 @@ static inline void php_ion_serialize_object_lob(php_ion_serializer *ser, zend_ob
        }
 }
 
-static inline bool can_call_magic_serialize(php_ion_serializer *ser, zend_class_entry *ce)
+LOCAL 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)
+LOCAL bool can_call_iface_serialize(php_ion_serializer *ser, zend_class_entry *ce)
 {
-       return !!ce->serialize;
+  (void) ser;
+       return !!ce->serialize; // NOLINT
 }
 
-static inline bool can_call_custom_serialize(php_ion_serializer *ser, zend_object *zobject, zend_function **fn)
+LOCAL bool can_call_custom_serialize(php_ion_serializer *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 !!(*fn = zend_hash_find_ptr(&zobject->ce->function_table, ser->call_custom)); // NOLINT
        }
        return false;
 }
 
-static inline void php_ion_serialize_object(php_ion_serializer *ser, zend_object *zobject)
+LOCAL void php_ion_serialize_object(php_ion_serializer *ser, zend_object *zobject)
 {
        zend_function *fn;
        zend_class_entry *ce = zobject->ce;
@@ -1474,17 +1755,32 @@ static inline void php_ion_serialize_object(php_ion_serializer *ser, zend_object
        }
 }
 
-static inline void php_ion_serialize_refcounted(php_ion_serializer *ser, zval *zv)
+LOCAL bool php_ion_serialize_system_value(php_ion_serializer *ser, zval *zv)
 {
-       zend_ulong idx = (zend_ulong) (uintptr_t) Z_COUNTED_P(zv);
+       if (1 == php_ion_globals.serializer.level) {
+               if (Z_TYPE_P(zv) == IS_OBJECT) {
+                       if (Z_OBJCE_P(zv) == ce_Symbol_Table_Shared) {
+                               php_ion_symbol_table *obj = php_ion_obj(symbol_table, Z_OBJ_P(zv));
+                               ION_CHECK_RETURN(true, ion_symbol_table_unload(obj->tab, ser->writer));
+                               return true;
+                       }
+               }
+       }
+       return false;
+}
 
-       ION_STRING is;
-       if (zend_hash_index_exists(ser->ids, idx)) {
-               zval *num = zend_hash_index_find(ser->ids, idx);
+LOCAL bool php_ion_serialize_backref(php_ion_serializer *ser, zval *zv)
+{
+       if (Z_TYPE_P(zv) == IS_STRING && Z_STR_P(zv) == zend_empty_string) {
+               return false;
+       }
+       if (Z_TYPE_P(zv) == IS_ARRAY && Z_ARR_P(zv) == &zend_empty_array) {
+               return false;
+       }
 
-               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 {
+       zend_ulong idx = (zend_ulong) (uintptr_t) Z_COUNTED_P(zv);
+       zval *ref = zend_hash_index_find(ser->ids, idx);
+       if (!ref) {
                zval num;
 
                ZVAL_LONG(&num, zend_hash_num_elements(ser->ids));
@@ -1493,28 +1789,45 @@ static inline void php_ion_serialize_refcounted(php_ion_serializer *ser, zval *z
                Z_TRY_ADDREF_P(zv);
                zend_hash_next_index_insert(ser->tmp, zv);
 
-               switch (Z_TYPE_P(zv)) {
-               case IS_STRING:
-                       ION_CHECK(ion_writer_write_string(ser->writer, ion_string_from_zend(&is, Z_STR_P(zv))));
-                       break;
+               return false;
+       }
 
-               case IS_ARRAY:
-                       php_ion_serialize_array(ser, Z_ARRVAL_P(zv));
-                       break;
+       ION_CHECK_RETURN(true, ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_BACKREF));
+       ION_CHECK_RETURN(true, ion_writer_write_int64(ser->writer, Z_LVAL_P(ref)));
+       return true;
+}
 
-               case IS_OBJECT:
-                       php_ion_serialize_object(ser, Z_OBJ_P(zv));
-                       break;
+LOCAL void php_ion_serialize_refcounted(php_ion_serializer *ser, zval *zv)
+{
+       if (php_ion_serialize_system_value(ser, zv)) {
+               return;
+       }
+       if (php_ion_serialize_backref(ser, zv)) {
+               return;
+       }
 
-               case IS_REFERENCE:
-                       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;
-               }
+       ION_STRING is;
+       switch (Z_TYPE_P(zv)) {
+       case IS_STRING:
+               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(ser, Z_ARRVAL_P(zv));
+               break;
+
+       case IS_OBJECT:
+               php_ion_serialize_object(ser, Z_OBJ_P(zv));
+               break;
+
+       case IS_REFERENCE:
+               ION_CHECK(ion_writer_add_annotation_symbol(ser->writer, &PHP_ION_SYMBOL_REFERENCE));
+               php_ion_serialize_zval(ser, Z_REFVAL_P(zv));
+               break;
        }
 }
 
-static inline void php_ion_serialize_zval(php_ion_serializer *ser, zval *zv)
+LOCAL void php_ion_serialize_zval(php_ion_serializer *ser, zval *zv)
 {
        OBJ_CHECK(ser);
 
@@ -1546,9 +1859,11 @@ static inline void php_ion_serialize_zval(php_ion_serializer *ser, zval *zv)
        }
 }
 
-php_ion_decl(serializer_php, Serializer_PHP, php_ion_serializer_php_dtor(obj));
+#define php_ion_serializer_php_copy(o,n)
+php_ion_decl(serializer_php, Serializer_PHP);
+#define clone_ion_Serializer_PHP NULL
 
-static inline void php_ion_serialize_ex(php_ion_serializer *ser, zval *zv)
+LOCAL void php_ion_serialize_ex(php_ion_serializer *ser, zval *zv)
 {
        HashPosition pos;
        HashTable *arr = NULL;
@@ -1598,7 +1913,7 @@ void php_ion_serialize(php_ion_serializer *ser, zval *zv, zval *return_value)
        writer->type = BUFFER_WRITER;
 
        if (ser->options) {
-               zo_opt = writer->opt = create_ion_Writer_Options(NULL);
+               zo_opt = writer->opt = php_ion_writer_options_new();
                php_ion_obj(writer_options, writer->opt)->opt = *ser->options;
        }
 
@@ -1628,24 +1943,26 @@ typedef struct php_ion_unserializer_php {
        zend_object *opt, std;
 } php_ion_unserializer_php;
 
-static inline void php_ion_unserializer_php_ctor(php_ion_unserializer_php *ser_obj)
+LOCAL 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"),
+       zend_update_property_bool(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("multiSequence"),
+                       ser_obj->unserializer.multi_seq);
+       zend_update_property_bool(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callMagicUnserialize"),
                        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"),
+               zend_update_property_str(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomUnserialize"),
                                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"));
+               zend_update_property_null(ser_obj->std.ce, &ser_obj->std, ZEND_STRL("callCustomUnserialize"));
        }
        if (!ser_obj->opt) {
-               ser_obj->opt = create_ion_Reader_Options(NULL);
+               ser_obj->opt = php_ion_reader_options_new();
        } else {
                GC_ADDREF(ser_obj->opt);
        }
@@ -1654,34 +1971,34 @@ static inline void php_ion_unserializer_php_ctor(php_ion_unserializer_php *ser_o
        GC_DELREF(ser_obj->opt);
 }
 
-static inline void php_ion_unserializer_php_dtor(php_ion_unserializer_php *obj)
+LOCAL void php_ion_unserializer_php_dtor(php_ion_unserializer_php *obj)
 {
        if (obj->unserializer.call_custom) {
                zend_string_release(obj->unserializer.call_custom);
        }
 }
 
-static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *return_value, ION_TYPE *typ);
+LOCAL 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)
+LOCAL bool can_call_magic_unserialize(php_ion_unserializer *ser, zend_class_entry *ce)
 {
        return (ce && ce->__unserialize && ser->call_magic);
 }
 
-static inline bool can_call_iface_unserialize(php_ion_unserializer *ser, zend_class_entry *ce)
+LOCAL bool can_call_iface_unserialize(php_ion_unserializer *ser, zend_class_entry *ce)
 {
        return (ce && ce->unserialize);
 }
 
-static inline bool can_call_custom_unserialize(php_ion_unserializer *ser, zend_object *zobject, zend_function **fn)
+LOCAL 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 !!(*fn = zend_hash_find_ptr(&zobject->ce->function_table, ser->call_custom)); // NOLINT
        }
        return false;
 }
 
-static inline zval *php_ion_unserialize_class(php_ion_unserializer *ser, zval *return_value)
+LOCAL zval *php_ion_unserialize_class(php_ion_unserializer *ser, zval *return_value)
 {
        zend_class_entry *ce = zend_lookup_class(ser->annotations.object_class);
 
@@ -1695,9 +2012,11 @@ static inline zval *php_ion_unserialize_class(php_ion_unserializer *ser, zval *r
        return NULL;
 }
 
-static inline void php_ion_unserialize_object_enum(php_ion_unserializer *ser, zval *return_value)
+LOCAL void php_ion_unserialize_object_enum(php_ion_unserializer *ser, zval *return_value)
 {
        zend_string *zs_case = zval_get_string(return_value);
+       zend_hash_next_index_insert(ser->tmp, return_value);
+       ZVAL_NULL(return_value);
        ION_CATCH();
 
        zend_class_entry *ce = zend_lookup_class(ser->annotations.object_class);
@@ -1716,18 +2035,23 @@ static inline void php_ion_unserialize_object_enum(php_ion_unserializer *ser, zv
        zend_string_release(zs_case);
 }
 
-static inline void php_ion_unserialize_object_iface(php_ion_unserializer *ser, zval *return_value)
+LOCAL 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);
+               zend_hash_next_index_insert(ser->tmp, 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)) {
                        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);
+               } else {
+                       zval_ptr_dtor(backref);
+                       ZVAL_NULL(backref);
+                       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 {
@@ -1736,25 +2060,47 @@ static inline void php_ion_unserialize_object_iface(php_ion_unserializer *ser, z
        }
 }
 
-static inline void php_ion_unserialize_field_name(php_ion_unserializer *ser, zend_string **key)
+LOCAL void php_ion_unserialize_field_name_ex(php_ion_unserializer *ser, ION_STRING *name, SID *sid)
 {
-       // FIXME: symbol table
-       ION_STRING name;
-       ION_CHECK(ion_reader_get_field_name(ser->reader, &name));
-       if (!name.length) {
+       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 = '$';
-                       *key = zend_string_init(ptr, end - ptr, 0);
-                       return;
+                       ION_STRING_ASSIGN(name, &is_ptr->value);
+               } else {
+                       *sid = is_ptr->sid;
+               }
+       }
+}
+
+LOCAL void php_ion_unserialize_field_name(php_ion_unserializer *ser, zend_string **key, bool is_prop)
+{
+       // FIXME: symbol table
+       ION_STRING name;
+       SID sid = UNKNOWN_SID;
+       char buf[MAX_LENGTH_OF_LONG + 1 + 1] = {0}, *end = buf + sizeof(buf) - 1, *ptr;
+
+       php_ion_unserialize_field_name_ex(ser, &name, &sid);
+       ION_CATCH();
+
+       switch (name.length) {
+       case 0:
+               ptr = zend_print_long_to_buf(end, sid);
+               *--ptr = '$';
+               *key = zend_string_init(ptr, end - ptr, 0);
+               break;
+       case 1:
+               *key = ZSTR_CHAR(*name.value);
+               break;
+       default:
+               if (is_prop) {
+                       *key = zend_string_init_interned((char *) name.value, name.length, 0);
+               } else {
+                       *key = zend_string_from_ion(&name);
                }
+               break;
        }
-       *key = zend_string_from_ion(&name);
 }
 
 static void php_ion_unserialize_props(php_ion_unserializer *ser, zval *return_value)
@@ -1772,7 +2118,7 @@ static void php_ion_unserialize_props(php_ion_unserializer *ser, zval *return_va
                }
 
                zend_string *key;
-               php_ion_unserialize_field_name(ser, &key);
+               php_ion_unserialize_field_name(ser, &key, true);
                ION_CATCH();
 
                zval zvalue;
@@ -1798,7 +2144,7 @@ static void php_ion_unserialize_props(php_ion_unserializer *ser, zval *return_va
  * (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)
+LOCAL void php_ion_unserialize_hash(php_ion_unserializer *ser, zval *return_value)
 {
        zend_hash_next_index_insert(ser->ids, return_value);
 
@@ -1813,7 +2159,7 @@ static inline void php_ion_unserialize_hash(php_ion_unserializer *ser, zval *ret
                }
 
                zend_string *key;
-               php_ion_unserialize_field_name(ser, &key);
+               php_ion_unserialize_field_name(ser, &key, false);
                ION_CATCH();
 
                zval zvalue;
@@ -1839,7 +2185,7 @@ static inline void php_ion_unserialize_hash(php_ion_unserializer *ser, zval *ret
        ION_CHECK(ion_reader_step_out(ser->reader));
 }
 
-static inline void verify_unserializer(php_ion_unserializer *ser, zend_object *zobject, zend_function **fn)
+LOCAL void verify_unserializer(php_ion_unserializer *ser, zend_object *zobject, zend_function **fn)
 {
        switch (ser->annotations.object_type) {
        case 'c':
@@ -1867,11 +2213,11 @@ static inline void verify_unserializer(php_ion_unserializer *ser, zend_object *z
        }
 }
 
-static inline void php_ion_unserialize_object(php_ion_unserializer *ser, zval *return_value)
+LOCAL void php_ion_unserialize_object(php_ion_unserializer *ser, zval *return_value)
 {
        // backup possible backref to array returned by magic/custom __serialize()
        zval *input = zend_hash_next_index_insert(ser->tmp, return_value);
-
+       ZVAL_NULL(return_value);
        php_ion_unserialize_class(ser, return_value);
        ION_CATCH();
 
@@ -1900,7 +2246,7 @@ static inline void php_ion_unserialize_object(php_ion_unserializer *ser, zval *r
        zval_ptr_dtor(&rv);
 }
 
-static inline void php_ion_unserialize_struct(php_ion_unserializer *ser, zval *return_value)
+LOCAL void php_ion_unserialize_struct(php_ion_unserializer *ser, zval *return_value)
 {
        if (ser->annotations.object_class) {
                switch (ser->annotations.object_type) {
@@ -1914,8 +2260,16 @@ static inline void php_ion_unserialize_struct(php_ion_unserializer *ser, zval *r
                        php_ion_unserialize_object(ser, return_value);
                }
        } else if (!ser->annotations.object_type) {
+               bool is_shared_symtab = ser->annotations.shared_symtab;
                array_init(return_value);
                php_ion_unserialize_hash(ser, return_value);
+               if (is_shared_symtab) {
+                       zval zobj;
+                       object_init_ex(&zobj, ce_Symbol_Table_Shared);
+                       zend_call_known_function(Z_OBJCE(zobj)->constructor, Z_OBJ(zobj), Z_OBJCE(zobj), NULL, 0, NULL, Z_ARRVAL_P(return_value));
+                       zval_ptr_dtor(return_value);
+                       RETURN_COPY_VALUE(&zobj);
+               }
        } else if (ser->annotations.object_type == 'o') {
                object_init(return_value);
                php_ion_unserialize_hash(ser, return_value);
@@ -1925,7 +2279,7 @@ static inline void php_ion_unserialize_struct(php_ion_unserializer *ser, zval *r
        }
 }
 
-static inline void php_ion_unserialize_list(php_ion_unserializer *ser, zval *return_value)
+LOCAL void php_ion_unserialize_list(php_ion_unserializer *ser, zval *return_value)
 {
        ION_CHECK(ion_reader_step_in(ser->reader));
        array_init(return_value);
@@ -1949,12 +2303,12 @@ static inline void php_ion_unserialize_list(php_ion_unserializer *ser, zval *ret
        ION_CHECK(ion_reader_step_out(ser->reader));
 }
 
-static inline void php_ion_reader_read_lob(ION_READER *reader, zval *return_value)
+LOCAL void php_ion_reader_read_lob(ION_READER *reader, zval *return_value)
 {
        zend_string *zstr = zend_string_alloc(0x1000, 0);
-again:
+again: ;
        SIZE read = 0;
-       iERR err = ion_reader_read_lob_bytes(reader, (BYTE *) zstr->val, zstr->len, &read);
+       iERR err = ion_reader_read_lob_bytes(reader, (BYTE *) zstr->val, (SIZE) zstr->len, &read);
        if (err == IERR_BUFFER_TOO_SMALL) {
                zstr = zend_string_extend(zstr, zstr->len << 2, 0);
                goto again;
@@ -1967,7 +2321,7 @@ again:
        RETURN_STR(zstr);
 }
 
-static inline void php_ion_reader_read_timestamp(ION_READER *reader, ION_READER_OPTIONS *opt, zval *return_value)
+LOCAL 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(reader, &ts));
@@ -1984,7 +2338,7 @@ static inline void php_ion_reader_read_timestamp(ION_READER *reader, ION_READER_
        OBJ_CHECK(ts_obj);
 }
 
-static inline void php_ion_reader_read_int(ION_READER *reader, zval *return_value)
+LOCAL void php_ion_reader_read_int(ION_READER *reader, zval *return_value)
 {
        ION_INT *num = NULL;
        ION_CHECK(ion_int_alloc(reader, &num));
@@ -1998,7 +2352,7 @@ static inline void php_ion_reader_read_int(ION_READER *reader, zval *return_valu
                RETVAL_LONG(i64);
                goto done;
 
-       case IERR_NUMERIC_OVERFLOW:
+       case IERR_NUMERIC_OVERFLOW: ;
                SIZE max, len;
                ION_CHECK(ion_int_char_length(num, &max));
                zend_string *zs = zend_string_alloc(max, 0);
@@ -2015,7 +2369,7 @@ static inline void php_ion_reader_read_int(ION_READER *reader, zval *return_valu
        }
 }
 
-static inline void php_ion_unserialize_backref(php_ion_unserializer *ser, zval *return_value)
+LOCAL void php_ion_unserialize_backref(php_ion_unserializer *ser, zval *return_value)
 {
        zval *backref = zend_hash_index_find(ser->ids, Z_LVAL_P(return_value));
 
@@ -2024,11 +2378,11 @@ static inline void php_ion_unserialize_backref(php_ion_unserializer *ser, zval *
                zend_hash_next_index_insert(ser->addref, return_value);
        } else {
                zend_throw_exception_ex(spl_ce_RuntimeException, IERR_INTERNAL_ERROR,
-                               "Could not find back reference %ld", Z_LVAL_P(return_value));
+                               "Could not find back reference " ZEND_LONG_FMT, Z_LVAL_P(return_value));
        }
 }
 
-static inline void php_ion_unserialize_annotations(php_ion_unserializer *ser)
+LOCAL void php_ion_unserialize_annotations(php_ion_unserializer *ser)
 {
        memset(&ser->annotations, 0, sizeof(ser->annotations));
 
@@ -2039,6 +2393,9 @@ static inline void php_ion_unserialize_annotations(php_ion_unserializer *ser)
                ION_CHECK(ion_reader_get_an_annotation(ser->reader, i, &ann_str));
 
                if (ann_str.length != 1) {
+                       if (ION_STRING_EQUALS(&ann_str, &ION_SYMBOL_SHARED_SYMBOL_TABLE_STRING)) {
+                               ser->annotations.shared_symtab = true;
+                       }
                        continue;
                }
 
@@ -2116,10 +2473,10 @@ static inline void php_ion_unserialize_annotations(php_ion_unserializer *ser)
        }
 }
 
-static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *return_value, ION_TYPE *typ)
+LOCAL void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *return_value, ION_TYPE *typ)
 {
        if (typ) {
-               memcpy(&ser->type, typ, sizeof(ser->type));
+               memcpy(&ser->type, typ, sizeof(ser->type)); // NOLINT
        } else {
                typ = &ser->type;
                ION_CHECK(ion_reader_next(ser->reader, typ));
@@ -2147,7 +2504,7 @@ static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *ret
                ION_CHECK(ion_reader_read_null(ser->reader, typ));
                RETURN_NULL();
 
-       case tid_BOOL_INT:
+       case tid_BOOL_INT: ;
                BOOL bval;
                ION_CHECK(ion_reader_read_bool(ser->reader, &bval));
                RETURN_BOOL(bval);
@@ -2169,7 +2526,7 @@ static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *ret
                }
                return;
 
-       case tid_FLOAT_INT:
+       case tid_FLOAT_INT: ;
                double d;
                ION_CHECK(ion_reader_read_double(ser->reader, &d));
                RETURN_DOUBLE(d);
@@ -2187,23 +2544,21 @@ static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *ret
                zend_hash_next_index_insert(ser->ids, return_value);
                return;
 
-       case tid_SYMBOL_INT:
+       case tid_SYMBOL_INT: ;
                ION_SYMBOL sym;
                ION_CHECK(ion_reader_read_ion_symbol(ser->reader, &sym));
                php_ion_symbol_zval(&sym, 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:
+       case tid_STRING_INT: ;
                ION_STRING str;
                ION_CHECK(ion_reader_read_string(ser->reader, &str));
                RETVAL_STRINGL((char *) str.value, str.length);
                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);
@@ -2213,7 +2568,6 @@ static inline void php_ion_unserialize_zval(php_ion_unserializer *ser, zval *ret
        case tid_BLOB_INT:
                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(ser->ids, return_value);
@@ -2243,9 +2597,11 @@ unserialize_struct: ;
        }
 }
 
-php_ion_decl(unserializer_php, Unserializer_PHP, php_ion_unserializer_php_dtor(obj));
+#define php_ion_unserializer_php_copy(o,n)
+php_ion_decl(unserializer_php, Unserializer_PHP);
+#define clone_ion_Unserializer_PHP NULL
 
-static inline void php_ion_unserialize_ex(php_ion_unserializer *ser, zval *return_value)
+LOCAL void php_ion_unserialize_ex(php_ion_unserializer *ser, zval *return_value)
 {
        if (ser->multi_seq) {
                array_init(return_value);
@@ -2297,7 +2653,8 @@ void php_ion_unserialize(php_ion_unserializer *ser, zval *zdata, zval *return_va
                reader->buffer = zval_get_string(zdata);
        } else {
                zend_throw_exception_ex(spl_ce_InvalidArgumentException, IERR_INVALID_ARG,
-                               "Invalid source to unserialize; expected string or resource");
+                               "Invalid source to unserialize: expected string or resource, got %s",
+                                                               zend_zval_type_name(zdata));
                if (zo_ser) {
                        OBJ_RELEASE(zo_ser);
                }
@@ -2305,7 +2662,7 @@ void php_ion_unserialize(php_ion_unserializer *ser, zval *zdata, zval *return_va
        }
 
        if (ser->options) {
-               zo_opt = reader->opt = create_ion_Reader_Options(NULL);
+               zo_opt = reader->opt = php_ion_reader_options_new();
                php_ion_obj(reader_options, reader->opt)->opt = *ser->options;
        }
 
@@ -2324,24 +2681,3 @@ void php_ion_unserialize(php_ion_unserializer *ser, zval *zdata, zval *return_va
                OBJ_RELEASE(zo_ser);
        }
 }
-
-static inline zval *php_ion_global_symbol_fetch_by_enum(zend_string *name)
-{
-       zval *zgs = zend_hash_find(&php_ion_globals.symbol.cache, name);
-       if (!zgs) {
-               zval *zid = zend_hash_find(&g_sym_map, name);
-               if (zid) {
-                       zval *zss = zend_hash_index_find(&g_sym_hash, Z_LVAL_P(zid));
-                       if (zss) {
-                               zval zsym;
-                               object_init_ex(&zsym, ce_Symbol);
-                               php_ion_symbol *sym = php_ion_obj(symbol, Z_OBJ(zsym));
-                               sym->sym.sid = Z_LVAL_P(zid);
-                               sym->value = zval_get_string(zss);
-                               php_ion_symbol_ctor(sym);
-                               zgs = zend_hash_add(&php_ion_globals.symbol.cache, name, &zsym);
-                       }
-               }
-       }
-       return zgs;
-}