886 lines
24 KiB
Go
886 lines
24 KiB
Go
/*
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* Copyright 2021 ByteDance Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package encoder
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import (
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`fmt`
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`reflect`
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`strconv`
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`strings`
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`unsafe`
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`github.com/bytedance/sonic/internal/resolver`
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`github.com/bytedance/sonic/internal/rt`
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`github.com/bytedance/sonic/option`
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)
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type _Op uint8
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const (
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_OP_null _Op = iota + 1
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_OP_empty_arr
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_OP_empty_obj
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_OP_bool
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_OP_i8
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_OP_i16
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_OP_i32
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_OP_i64
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_OP_u8
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_OP_u16
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_OP_u32
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_OP_u64
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_OP_f32
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_OP_f64
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_OP_str
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_OP_bin
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_OP_quote
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_OP_number
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_OP_eface
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_OP_iface
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_OP_byte
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_OP_text
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_OP_deref
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_OP_index
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_OP_load
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_OP_save
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_OP_drop
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_OP_drop_2
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_OP_recurse
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_OP_is_nil
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_OP_is_nil_p1
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_OP_is_zero_1
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_OP_is_zero_2
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_OP_is_zero_4
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_OP_is_zero_8
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_OP_is_zero_map
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_OP_goto
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_OP_map_iter
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_OP_map_stop
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_OP_map_check_key
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_OP_map_write_key
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_OP_map_value_next
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_OP_slice_len
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_OP_slice_next
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_OP_marshal
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_OP_marshal_p
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_OP_marshal_text
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_OP_marshal_text_p
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_OP_cond_set
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_OP_cond_testc
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)
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const (
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_INT_SIZE = 32 << (^uint(0) >> 63)
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_PTR_SIZE = 32 << (^uintptr(0) >> 63)
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_PTR_BYTE = unsafe.Sizeof(uintptr(0))
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)
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const (
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_MAX_ILBUF = 100000 // cutoff at 100k of IL instructions
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_MAX_FIELDS = 50 // cutoff at 50 fields struct
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)
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var _OpNames = [256]string {
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_OP_null : "null",
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_OP_empty_arr : "empty_arr",
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_OP_empty_obj : "empty_obj",
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_OP_bool : "bool",
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_OP_i8 : "i8",
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_OP_i16 : "i16",
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_OP_i32 : "i32",
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_OP_i64 : "i64",
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_OP_u8 : "u8",
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_OP_u16 : "u16",
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_OP_u32 : "u32",
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_OP_u64 : "u64",
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_OP_f32 : "f32",
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_OP_f64 : "f64",
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_OP_str : "str",
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_OP_bin : "bin",
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_OP_quote : "quote",
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_OP_number : "number",
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_OP_eface : "eface",
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_OP_iface : "iface",
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_OP_byte : "byte",
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_OP_text : "text",
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_OP_deref : "deref",
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_OP_index : "index",
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_OP_load : "load",
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_OP_save : "save",
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_OP_drop : "drop",
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_OP_drop_2 : "drop_2",
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_OP_recurse : "recurse",
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_OP_is_nil : "is_nil",
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_OP_is_nil_p1 : "is_nil_p1",
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_OP_is_zero_1 : "is_zero_1",
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_OP_is_zero_2 : "is_zero_2",
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_OP_is_zero_4 : "is_zero_4",
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_OP_is_zero_8 : "is_zero_8",
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_OP_is_zero_map : "is_zero_map",
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_OP_goto : "goto",
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_OP_map_iter : "map_iter",
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_OP_map_stop : "map_stop",
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_OP_map_check_key : "map_check_key",
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_OP_map_write_key : "map_write_key",
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_OP_map_value_next : "map_value_next",
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_OP_slice_len : "slice_len",
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_OP_slice_next : "slice_next",
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_OP_marshal : "marshal",
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_OP_marshal_p : "marshal_p",
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_OP_marshal_text : "marshal_text",
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_OP_marshal_text_p : "marshal_text_p",
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_OP_cond_set : "cond_set",
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_OP_cond_testc : "cond_testc",
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}
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func (self _Op) String() string {
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if ret := _OpNames[self]; ret != "" {
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return ret
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} else {
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return "<invalid>"
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}
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}
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func _OP_int() _Op {
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switch _INT_SIZE {
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case 32: return _OP_i32
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case 64: return _OP_i64
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default: panic("unsupported int size")
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}
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}
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func _OP_uint() _Op {
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switch _INT_SIZE {
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case 32: return _OP_u32
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case 64: return _OP_u64
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default: panic("unsupported uint size")
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}
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}
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func _OP_uintptr() _Op {
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switch _PTR_SIZE {
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case 32: return _OP_u32
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case 64: return _OP_u64
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default: panic("unsupported pointer size")
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}
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}
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func _OP_is_zero_ints() _Op {
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switch _INT_SIZE {
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case 32: return _OP_is_zero_4
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case 64: return _OP_is_zero_8
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default: panic("unsupported integer size")
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}
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}
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type _Instr struct {
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u uint64 // union {op: 8, _: 8, vi: 48}, vi maybe int or len(str)
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p unsafe.Pointer // maybe GoString.Ptr, or *GoType
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}
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func packOp(op _Op) uint64 {
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return uint64(op) << 56
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}
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func newInsOp(op _Op) _Instr {
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return _Instr{u: packOp(op)}
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}
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func newInsVi(op _Op, vi int) _Instr {
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return _Instr{u: packOp(op) | rt.PackInt(vi)}
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}
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func newInsVs(op _Op, vs string) _Instr {
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return _Instr {
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u: packOp(op) | rt.PackInt(len(vs)),
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p: (*rt.GoString)(unsafe.Pointer(&vs)).Ptr,
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}
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}
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func newInsVt(op _Op, vt reflect.Type) _Instr {
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return _Instr {
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u: packOp(op),
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p: unsafe.Pointer(rt.UnpackType(vt)),
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}
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}
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func newInsVp(op _Op, vt reflect.Type, pv bool) _Instr {
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i := 0
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if pv {
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i = 1
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}
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return _Instr {
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u: packOp(op) | rt.PackInt(i),
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p: unsafe.Pointer(rt.UnpackType(vt)),
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}
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}
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func (self _Instr) op() _Op {
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return _Op(self.u >> 56)
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}
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func (self _Instr) vi() int {
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return rt.UnpackInt(self.u)
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}
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func (self _Instr) vf() uint8 {
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return (*rt.GoType)(self.p).KindFlags
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}
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func (self _Instr) vs() (v string) {
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(*rt.GoString)(unsafe.Pointer(&v)).Ptr = self.p
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(*rt.GoString)(unsafe.Pointer(&v)).Len = self.vi()
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return
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}
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func (self _Instr) vk() reflect.Kind {
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return (*rt.GoType)(self.p).Kind()
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}
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func (self _Instr) vt() reflect.Type {
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return (*rt.GoType)(self.p).Pack()
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}
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func (self _Instr) vp() (vt reflect.Type, pv bool) {
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return (*rt.GoType)(self.p).Pack(), rt.UnpackInt(self.u) == 1
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}
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func (self _Instr) i64() int64 {
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return int64(self.vi())
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}
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func (self _Instr) vlen() int {
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return int((*rt.GoType)(self.p).Size)
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}
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func (self _Instr) isBranch() bool {
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switch self.op() {
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case _OP_goto : fallthrough
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case _OP_is_nil : fallthrough
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case _OP_is_nil_p1 : fallthrough
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case _OP_is_zero_1 : fallthrough
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case _OP_is_zero_2 : fallthrough
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case _OP_is_zero_4 : fallthrough
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case _OP_is_zero_8 : fallthrough
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case _OP_map_check_key : fallthrough
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case _OP_map_write_key : fallthrough
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case _OP_slice_next : fallthrough
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case _OP_cond_testc : return true
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default : return false
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}
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}
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func (self _Instr) disassemble() string {
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switch self.op() {
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case _OP_byte : return fmt.Sprintf("%-18s%s", self.op().String(), strconv.QuoteRune(rune(self.vi())))
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case _OP_text : return fmt.Sprintf("%-18s%s", self.op().String(), strconv.Quote(self.vs()))
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case _OP_index : return fmt.Sprintf("%-18s%d", self.op().String(), self.vi())
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case _OP_recurse : fallthrough
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case _OP_map_iter : fallthrough
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case _OP_marshal : fallthrough
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case _OP_marshal_p : fallthrough
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case _OP_marshal_text : fallthrough
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case _OP_marshal_text_p : return fmt.Sprintf("%-18s%s", self.op().String(), self.vt())
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case _OP_goto : fallthrough
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case _OP_is_nil : fallthrough
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case _OP_is_nil_p1 : fallthrough
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case _OP_is_zero_1 : fallthrough
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case _OP_is_zero_2 : fallthrough
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case _OP_is_zero_4 : fallthrough
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case _OP_is_zero_8 : fallthrough
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case _OP_is_zero_map : fallthrough
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case _OP_cond_testc : fallthrough
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case _OP_map_check_key : fallthrough
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case _OP_map_write_key : return fmt.Sprintf("%-18sL_%d", self.op().String(), self.vi())
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case _OP_slice_next : return fmt.Sprintf("%-18sL_%d, %s", self.op().String(), self.vi(), self.vt())
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default : return self.op().String()
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}
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}
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type (
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_Program []_Instr
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)
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func (self _Program) pc() int {
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return len(self)
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}
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func (self _Program) tag(n int) {
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if n >= _MaxStack {
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panic("type nesting too deep")
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}
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}
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func (self _Program) pin(i int) {
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v := &self[i]
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v.u &= 0xffff000000000000
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v.u |= rt.PackInt(self.pc())
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}
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func (self _Program) rel(v []int) {
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for _, i := range v {
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self.pin(i)
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}
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}
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func (self *_Program) add(op _Op) {
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*self = append(*self, newInsOp(op))
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}
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func (self *_Program) key(op _Op) {
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*self = append(*self,
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newInsVi(_OP_byte, '"'),
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newInsOp(op),
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newInsVi(_OP_byte, '"'),
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)
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}
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func (self *_Program) int(op _Op, vi int) {
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*self = append(*self, newInsVi(op, vi))
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}
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func (self *_Program) str(op _Op, vs string) {
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*self = append(*self, newInsVs(op, vs))
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}
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func (self *_Program) rtt(op _Op, vt reflect.Type) {
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*self = append(*self, newInsVt(op, vt))
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}
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func (self *_Program) vp(op _Op, vt reflect.Type, pv bool) {
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*self = append(*self, newInsVp(op, vt, pv))
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}
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func (self _Program) disassemble() string {
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nb := len(self)
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tab := make([]bool, nb + 1)
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ret := make([]string, 0, nb + 1)
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/* prescan to get all the labels */
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for _, ins := range self {
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if ins.isBranch() {
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tab[ins.vi()] = true
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}
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}
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/* disassemble each instruction */
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for i, ins := range self {
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if !tab[i] {
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ret = append(ret, "\t" + ins.disassemble())
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} else {
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ret = append(ret, fmt.Sprintf("L_%d:\n\t%s", i, ins.disassemble()))
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}
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}
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/* add the last label, if needed */
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if tab[nb] {
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ret = append(ret, fmt.Sprintf("L_%d:", nb))
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}
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/* add an "end" indicator, and join all the strings */
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return strings.Join(append(ret, "\tend"), "\n")
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}
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type _Compiler struct {
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opts option.CompileOptions
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pv bool
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tab map[reflect.Type]bool
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rec map[reflect.Type]uint8
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}
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func newCompiler() *_Compiler {
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return &_Compiler {
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opts: option.DefaultCompileOptions(),
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tab: map[reflect.Type]bool{},
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rec: map[reflect.Type]uint8{},
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}
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}
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func (self *_Compiler) apply(opts option.CompileOptions) *_Compiler {
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self.opts = opts
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if self.opts.RecursiveDepth > 0 {
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self.rec = map[reflect.Type]uint8{}
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}
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return self
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}
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func (self *_Compiler) rescue(ep *error) {
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if val := recover(); val != nil {
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if err, ok := val.(error); ok {
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*ep = err
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} else {
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panic(val)
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}
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}
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}
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func (self *_Compiler) compile(vt reflect.Type, pv bool) (ret _Program, err error) {
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defer self.rescue(&err)
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self.compileOne(&ret, 0, vt, pv)
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return
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}
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func (self *_Compiler) compileOne(p *_Program, sp int, vt reflect.Type, pv bool) {
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if self.tab[vt] {
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p.vp(_OP_recurse, vt, pv)
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} else {
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self.compileRec(p, sp, vt, pv)
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}
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}
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func (self *_Compiler) compileRec(p *_Program, sp int, vt reflect.Type, pv bool) {
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pr := self.pv
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pt := reflect.PtrTo(vt)
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/* check for addressable `json.Marshaler` with pointer receiver */
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if pv && pt.Implements(jsonMarshalerType) {
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p.rtt(_OP_marshal_p, pt)
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return
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}
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/* check for `json.Marshaler` */
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if vt.Implements(jsonMarshalerType) {
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self.compileMarshaler(p, _OP_marshal, vt, jsonMarshalerType)
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return
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}
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/* check for addressable `encoding.TextMarshaler` with pointer receiver */
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if pv && pt.Implements(encodingTextMarshalerType) {
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p.rtt(_OP_marshal_text_p, pt)
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return
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}
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/* check for `encoding.TextMarshaler` */
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if vt.Implements(encodingTextMarshalerType) {
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self.compileMarshaler(p, _OP_marshal_text, vt, encodingTextMarshalerType)
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return
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}
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/* enter the recursion, and compile the type */
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self.pv = pv
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self.tab[vt] = true
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self.compileOps(p, sp, vt)
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/* exit the recursion */
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self.pv = pr
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delete(self.tab, vt)
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}
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func (self *_Compiler) compileOps(p *_Program, sp int, vt reflect.Type) {
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switch vt.Kind() {
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case reflect.Bool : p.add(_OP_bool)
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case reflect.Int : p.add(_OP_int())
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case reflect.Int8 : p.add(_OP_i8)
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case reflect.Int16 : p.add(_OP_i16)
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case reflect.Int32 : p.add(_OP_i32)
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case reflect.Int64 : p.add(_OP_i64)
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case reflect.Uint : p.add(_OP_uint())
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case reflect.Uint8 : p.add(_OP_u8)
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case reflect.Uint16 : p.add(_OP_u16)
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case reflect.Uint32 : p.add(_OP_u32)
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case reflect.Uint64 : p.add(_OP_u64)
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case reflect.Uintptr : p.add(_OP_uintptr())
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case reflect.Float32 : p.add(_OP_f32)
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case reflect.Float64 : p.add(_OP_f64)
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case reflect.String : self.compileString (p, vt)
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case reflect.Array : self.compileArray (p, sp, vt.Elem(), vt.Len())
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case reflect.Interface : self.compileInterface (p, vt)
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case reflect.Map : self.compileMap (p, sp, vt)
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case reflect.Ptr : self.compilePtr (p, sp, vt.Elem())
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case reflect.Slice : self.compileSlice (p, sp, vt.Elem())
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case reflect.Struct : self.compileStruct (p, sp, vt)
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default : panic (error_type(vt))
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}
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}
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func (self *_Compiler) compileNil(p *_Program, sp int, vt reflect.Type, nil_op _Op, fn func(*_Program, int, reflect.Type)) {
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x := p.pc()
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p.add(_OP_is_nil)
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fn(p, sp, vt)
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e := p.pc()
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p.add(_OP_goto)
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p.pin(x)
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p.add(nil_op)
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p.pin(e)
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}
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func (self *_Compiler) compilePtr(p *_Program, sp int, vt reflect.Type) {
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|
self.compileNil(p, sp, vt, _OP_null, self.compilePtrBody)
|
|
}
|
|
|
|
func (self *_Compiler) compilePtrBody(p *_Program, sp int, vt reflect.Type) {
|
|
p.tag(sp)
|
|
p.add(_OP_save)
|
|
p.add(_OP_deref)
|
|
self.compileOne(p, sp + 1, vt, true)
|
|
p.add(_OP_drop)
|
|
}
|
|
|
|
func (self *_Compiler) compileMap(p *_Program, sp int, vt reflect.Type) {
|
|
self.compileNil(p, sp, vt, _OP_empty_obj, self.compileMapBody)
|
|
}
|
|
|
|
func (self *_Compiler) compileMapBody(p *_Program, sp int, vt reflect.Type) {
|
|
p.tag(sp + 1)
|
|
p.int(_OP_byte, '{')
|
|
p.add(_OP_save)
|
|
p.rtt(_OP_map_iter, vt)
|
|
p.add(_OP_save)
|
|
i := p.pc()
|
|
p.add(_OP_map_check_key)
|
|
u := p.pc()
|
|
p.add(_OP_map_write_key)
|
|
self.compileMapBodyKey(p, vt.Key())
|
|
p.pin(u)
|
|
p.int(_OP_byte, ':')
|
|
p.add(_OP_map_value_next)
|
|
self.compileOne(p, sp + 2, vt.Elem(), false)
|
|
j := p.pc()
|
|
p.add(_OP_map_check_key)
|
|
p.int(_OP_byte, ',')
|
|
v := p.pc()
|
|
p.add(_OP_map_write_key)
|
|
self.compileMapBodyKey(p, vt.Key())
|
|
p.pin(v)
|
|
p.int(_OP_byte, ':')
|
|
p.add(_OP_map_value_next)
|
|
self.compileOne(p, sp + 2, vt.Elem(), false)
|
|
p.int(_OP_goto, j)
|
|
p.pin(i)
|
|
p.pin(j)
|
|
p.add(_OP_map_stop)
|
|
p.add(_OP_drop_2)
|
|
p.int(_OP_byte, '}')
|
|
}
|
|
|
|
func (self *_Compiler) compileMapBodyKey(p *_Program, vk reflect.Type) {
|
|
if !vk.Implements(encodingTextMarshalerType) {
|
|
self.compileMapBodyTextKey(p, vk)
|
|
} else {
|
|
self.compileMapBodyUtextKey(p, vk)
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileMapBodyTextKey(p *_Program, vk reflect.Type) {
|
|
switch vk.Kind() {
|
|
case reflect.Invalid : panic("map key is nil")
|
|
case reflect.Bool : p.key(_OP_bool)
|
|
case reflect.Int : p.key(_OP_int())
|
|
case reflect.Int8 : p.key(_OP_i8)
|
|
case reflect.Int16 : p.key(_OP_i16)
|
|
case reflect.Int32 : p.key(_OP_i32)
|
|
case reflect.Int64 : p.key(_OP_i64)
|
|
case reflect.Uint : p.key(_OP_uint())
|
|
case reflect.Uint8 : p.key(_OP_u8)
|
|
case reflect.Uint16 : p.key(_OP_u16)
|
|
case reflect.Uint32 : p.key(_OP_u32)
|
|
case reflect.Uint64 : p.key(_OP_u64)
|
|
case reflect.Uintptr : p.key(_OP_uintptr())
|
|
case reflect.Float32 : p.key(_OP_f32)
|
|
case reflect.Float64 : p.key(_OP_f64)
|
|
case reflect.String : self.compileString(p, vk)
|
|
default : panic(error_type(vk))
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileMapBodyUtextKey(p *_Program, vk reflect.Type) {
|
|
if vk.Kind() != reflect.Ptr {
|
|
p.rtt(_OP_marshal_text, vk)
|
|
} else {
|
|
self.compileMapBodyUtextPtr(p, vk)
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileMapBodyUtextPtr(p *_Program, vk reflect.Type) {
|
|
i := p.pc()
|
|
p.add(_OP_is_nil)
|
|
p.rtt(_OP_marshal_text, vk)
|
|
j := p.pc()
|
|
p.add(_OP_goto)
|
|
p.pin(i)
|
|
p.str(_OP_text, "\"\"")
|
|
p.pin(j)
|
|
}
|
|
|
|
func (self *_Compiler) compileSlice(p *_Program, sp int, vt reflect.Type) {
|
|
self.compileNil(p, sp, vt, _OP_empty_arr, self.compileSliceBody)
|
|
}
|
|
|
|
func (self *_Compiler) compileSliceBody(p *_Program, sp int, vt reflect.Type) {
|
|
if isSimpleByte(vt) {
|
|
p.add(_OP_bin)
|
|
} else {
|
|
self.compileSliceArray(p, sp, vt)
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileSliceArray(p *_Program, sp int, vt reflect.Type) {
|
|
p.tag(sp)
|
|
p.int(_OP_byte, '[')
|
|
p.add(_OP_save)
|
|
p.add(_OP_slice_len)
|
|
i := p.pc()
|
|
p.rtt(_OP_slice_next, vt)
|
|
self.compileOne(p, sp + 1, vt, true)
|
|
j := p.pc()
|
|
p.rtt(_OP_slice_next, vt)
|
|
p.int(_OP_byte, ',')
|
|
self.compileOne(p, sp + 1, vt, true)
|
|
p.int(_OP_goto, j)
|
|
p.pin(i)
|
|
p.pin(j)
|
|
p.add(_OP_drop)
|
|
p.int(_OP_byte, ']')
|
|
}
|
|
|
|
func (self *_Compiler) compileArray(p *_Program, sp int, vt reflect.Type, nb int) {
|
|
p.tag(sp)
|
|
p.int(_OP_byte, '[')
|
|
p.add(_OP_save)
|
|
|
|
/* first item */
|
|
if nb != 0 {
|
|
self.compileOne(p, sp + 1, vt, self.pv)
|
|
p.add(_OP_load)
|
|
}
|
|
|
|
/* remaining items */
|
|
for i := 1; i < nb; i++ {
|
|
p.int(_OP_byte, ',')
|
|
p.int(_OP_index, i * int(vt.Size()))
|
|
self.compileOne(p, sp + 1, vt, self.pv)
|
|
p.add(_OP_load)
|
|
}
|
|
|
|
/* end of array */
|
|
p.add(_OP_drop)
|
|
p.int(_OP_byte, ']')
|
|
}
|
|
|
|
func (self *_Compiler) compileString(p *_Program, vt reflect.Type) {
|
|
if vt != jsonNumberType {
|
|
p.add(_OP_str)
|
|
} else {
|
|
p.add(_OP_number)
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileStruct(p *_Program, sp int, vt reflect.Type) {
|
|
if sp >= self.opts.MaxInlineDepth || p.pc() >= _MAX_ILBUF || (sp > 0 && vt.NumField() >= _MAX_FIELDS) {
|
|
p.vp(_OP_recurse, vt, self.pv)
|
|
if self.opts.RecursiveDepth > 0 {
|
|
if self.pv {
|
|
self.rec[vt] = 1
|
|
} else {
|
|
self.rec[vt] = 0
|
|
}
|
|
}
|
|
} else {
|
|
self.compileStructBody(p, sp, vt)
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileStructBody(p *_Program, sp int, vt reflect.Type) {
|
|
p.tag(sp)
|
|
p.int(_OP_byte, '{')
|
|
p.add(_OP_save)
|
|
p.add(_OP_cond_set)
|
|
|
|
/* compile each field */
|
|
for _, fv := range resolver.ResolveStruct(vt) {
|
|
var s []int
|
|
var o resolver.Offset
|
|
|
|
/* "omitempty" for arrays */
|
|
if fv.Type.Kind() == reflect.Array {
|
|
if fv.Type.Len() == 0 && (fv.Opts & resolver.F_omitempty) != 0 {
|
|
continue
|
|
}
|
|
}
|
|
|
|
/* index to the field */
|
|
for _, o = range fv.Path {
|
|
if p.int(_OP_index, int(o.Size)); o.Kind == resolver.F_deref {
|
|
s = append(s, p.pc())
|
|
p.add(_OP_is_nil)
|
|
p.add(_OP_deref)
|
|
}
|
|
}
|
|
|
|
/* check for "omitempty" option */
|
|
if fv.Type.Kind() != reflect.Struct && fv.Type.Kind() != reflect.Array && (fv.Opts & resolver.F_omitempty) != 0 {
|
|
s = append(s, p.pc())
|
|
self.compileStructFieldZero(p, fv.Type)
|
|
}
|
|
|
|
/* add the comma if not the first element */
|
|
i := p.pc()
|
|
p.add(_OP_cond_testc)
|
|
p.int(_OP_byte, ',')
|
|
p.pin(i)
|
|
|
|
/* compile the key and value */
|
|
ft := fv.Type
|
|
p.str(_OP_text, Quote(fv.Name) + ":")
|
|
|
|
/* check for "stringnize" option */
|
|
if (fv.Opts & resolver.F_stringize) == 0 {
|
|
self.compileOne(p, sp + 1, ft, self.pv)
|
|
} else {
|
|
self.compileStructFieldStr(p, sp + 1, ft)
|
|
}
|
|
|
|
/* patch the skipping jumps and reload the struct pointer */
|
|
p.rel(s)
|
|
p.add(_OP_load)
|
|
}
|
|
|
|
/* end of object */
|
|
p.add(_OP_drop)
|
|
p.int(_OP_byte, '}')
|
|
}
|
|
|
|
func (self *_Compiler) compileStructFieldStr(p *_Program, sp int, vt reflect.Type) {
|
|
pc := -1
|
|
ft := vt
|
|
sv := false
|
|
|
|
/* dereference the pointer if needed */
|
|
if ft.Kind() == reflect.Ptr {
|
|
ft = ft.Elem()
|
|
}
|
|
|
|
/* check if it can be stringized */
|
|
switch ft.Kind() {
|
|
case reflect.Bool : sv = true
|
|
case reflect.Int : sv = true
|
|
case reflect.Int8 : sv = true
|
|
case reflect.Int16 : sv = true
|
|
case reflect.Int32 : sv = true
|
|
case reflect.Int64 : sv = true
|
|
case reflect.Uint : sv = true
|
|
case reflect.Uint8 : sv = true
|
|
case reflect.Uint16 : sv = true
|
|
case reflect.Uint32 : sv = true
|
|
case reflect.Uint64 : sv = true
|
|
case reflect.Uintptr : sv = true
|
|
case reflect.Float32 : sv = true
|
|
case reflect.Float64 : sv = true
|
|
case reflect.String : sv = true
|
|
}
|
|
|
|
/* if it's not, ignore the "string" and follow the regular path */
|
|
if !sv {
|
|
self.compileOne(p, sp, vt, self.pv)
|
|
return
|
|
}
|
|
|
|
/* dereference the pointer */
|
|
if vt.Kind() == reflect.Ptr {
|
|
pc = p.pc()
|
|
vt = vt.Elem()
|
|
p.add(_OP_is_nil)
|
|
p.add(_OP_deref)
|
|
}
|
|
|
|
/* special case of a double-quoted string */
|
|
if ft != jsonNumberType && ft.Kind() == reflect.String {
|
|
p.add(_OP_quote)
|
|
} else {
|
|
self.compileStructFieldQuoted(p, sp, vt)
|
|
}
|
|
|
|
/* the "null" case of the pointer */
|
|
if pc != -1 {
|
|
e := p.pc()
|
|
p.add(_OP_goto)
|
|
p.pin(pc)
|
|
p.add(_OP_null)
|
|
p.pin(e)
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileStructFieldZero(p *_Program, vt reflect.Type) {
|
|
switch vt.Kind() {
|
|
case reflect.Bool : p.add(_OP_is_zero_1)
|
|
case reflect.Int : p.add(_OP_is_zero_ints())
|
|
case reflect.Int8 : p.add(_OP_is_zero_1)
|
|
case reflect.Int16 : p.add(_OP_is_zero_2)
|
|
case reflect.Int32 : p.add(_OP_is_zero_4)
|
|
case reflect.Int64 : p.add(_OP_is_zero_8)
|
|
case reflect.Uint : p.add(_OP_is_zero_ints())
|
|
case reflect.Uint8 : p.add(_OP_is_zero_1)
|
|
case reflect.Uint16 : p.add(_OP_is_zero_2)
|
|
case reflect.Uint32 : p.add(_OP_is_zero_4)
|
|
case reflect.Uint64 : p.add(_OP_is_zero_8)
|
|
case reflect.Uintptr : p.add(_OP_is_nil)
|
|
case reflect.Float32 : p.add(_OP_is_zero_4)
|
|
case reflect.Float64 : p.add(_OP_is_zero_8)
|
|
case reflect.String : p.add(_OP_is_nil_p1)
|
|
case reflect.Interface : p.add(_OP_is_nil_p1)
|
|
case reflect.Map : p.add(_OP_is_zero_map)
|
|
case reflect.Ptr : p.add(_OP_is_nil)
|
|
case reflect.Slice : p.add(_OP_is_nil_p1)
|
|
default : panic(error_type(vt))
|
|
}
|
|
}
|
|
|
|
func (self *_Compiler) compileStructFieldQuoted(p *_Program, sp int, vt reflect.Type) {
|
|
p.int(_OP_byte, '"')
|
|
self.compileOne(p, sp, vt, self.pv)
|
|
p.int(_OP_byte, '"')
|
|
}
|
|
|
|
func (self *_Compiler) compileInterface(p *_Program, vt reflect.Type) {
|
|
x := p.pc()
|
|
p.add(_OP_is_nil_p1)
|
|
|
|
/* iface and efaces are different */
|
|
if vt.NumMethod() == 0 {
|
|
p.add(_OP_eface)
|
|
} else {
|
|
p.add(_OP_iface)
|
|
}
|
|
|
|
/* the "null" value */
|
|
e := p.pc()
|
|
p.add(_OP_goto)
|
|
p.pin(x)
|
|
p.add(_OP_null)
|
|
p.pin(e)
|
|
}
|
|
|
|
func (self *_Compiler) compileMarshaler(p *_Program, op _Op, vt reflect.Type, mt reflect.Type) {
|
|
pc := p.pc()
|
|
vk := vt.Kind()
|
|
|
|
/* direct receiver */
|
|
if vk != reflect.Ptr {
|
|
p.rtt(op, vt)
|
|
return
|
|
}
|
|
|
|
/* value receiver with a pointer type, check for nil before calling the marshaler */
|
|
p.add(_OP_is_nil)
|
|
p.rtt(op, vt)
|
|
i := p.pc()
|
|
p.add(_OP_goto)
|
|
p.pin(pc)
|
|
p.add(_OP_null)
|
|
p.pin(i)
|
|
}
|