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|
package optdec
import (
"fmt"
"reflect"
caching "github.com/bytedance/sonic/internal/optcaching"
"github.com/bytedance/sonic/internal/rt"
"github.com/bytedance/sonic/internal/resolver"
)
const (
_MAX_FIELDS = 50 // cutoff at 50 fields struct
)
func (c *compiler) compileIntStringOption(vt reflect.Type) decFunc {
switch vt.Size() {
case 4:
switch vt.Kind() {
case reflect.Uint:
fallthrough
case reflect.Uintptr:
return &u32StringDecoder{}
case reflect.Int:
return &i32StringDecoder{}
}
case 8:
switch vt.Kind() {
case reflect.Uint:
fallthrough
case reflect.Uintptr:
return &u64StringDecoder{}
case reflect.Int:
return &i64StringDecoder{}
}
default:
panic("not supported pointer size: " + fmt.Sprint(vt.Size()))
}
panic("unreachable")
}
func isInteger(vt reflect.Type) bool {
switch vt.Kind() {
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint, reflect.Uintptr, reflect.Int: return true
default: return false
}
}
func (c *compiler) assertStringOptTypes(vt reflect.Type) {
if c.depth > _CompileMaxDepth {
panic(*stackOverflow)
}
c.depth += 1
defer func () {
c.depth -= 1
}()
if isInteger(vt) {
return
}
switch vt.Kind() {
case reflect.String, reflect.Bool, reflect.Float32, reflect.Float64:
return
case reflect.Ptr: c.assertStringOptTypes(vt.Elem())
default:
panicForInvalidStrType(vt)
}
}
func (c *compiler) compileFieldStringOption(vt reflect.Type) decFunc {
c.assertStringOptTypes(vt)
unmDec := c.tryCompilePtrUnmarshaler(vt, true)
if unmDec != nil {
return unmDec
}
switch vt.Kind() {
case reflect.String:
if vt == jsonNumberType {
return &numberStringDecoder{}
}
return &strStringDecoder{}
case reflect.Bool:
return &boolStringDecoder{}
case reflect.Int8:
return &i8StringDecoder{}
case reflect.Int16:
return &i16StringDecoder{}
case reflect.Int32:
return &i32StringDecoder{}
case reflect.Int64:
return &i64StringDecoder{}
case reflect.Uint8:
return &u8StringDecoder{}
case reflect.Uint16:
return &u16StringDecoder{}
case reflect.Uint32:
return &u32StringDecoder{}
case reflect.Uint64:
return &u64StringDecoder{}
case reflect.Float32:
return &f32StringDecoder{}
case reflect.Float64:
return &f64StringDecoder{}
case reflect.Uint:
fallthrough
case reflect.Uintptr:
fallthrough
case reflect.Int:
return c.compileIntStringOption(vt)
case reflect.Ptr:
return &ptrStrDecoder{
typ: rt.UnpackType(vt.Elem()),
deref: c.compileFieldStringOption(vt.Elem()),
}
default:
panicForInvalidStrType(vt)
return nil
}
}
func (c *compiler) compileStruct(vt reflect.Type) decFunc {
c.enter(vt)
defer c.exit(vt)
if c.namedPtr {
c.namedPtr = false
return c.compileStructBody(vt)
}
if c.depth >= c.opts.MaxInlineDepth + 1 || (c.counts > 0 && vt.NumField() >= _MAX_FIELDS) {
return &recuriveDecoder{
typ: rt.UnpackType(vt),
}
} else {
return c.compileStructBody(vt)
}
}
func (c *compiler) compileStructBody(vt reflect.Type) decFunc {
fv := resolver.ResolveStruct(vt)
entries := make([]fieldEntry, 0, len(fv))
for _, f := range fv {
var dec decFunc
/* dealt with field tag options */
if f.Opts&resolver.F_stringize != 0 {
dec = c.compileFieldStringOption(f.Type)
} else {
dec = c.compile(f.Type)
}
/* deal with embedded pointer fields */
if f.Path[0].Kind == resolver.F_deref {
dec = &embeddedFieldPtrDecoder{
field: f,
fieldDec: dec,
fieldName: f.Name,
}
}
entries = append(entries, fieldEntry{
FieldMeta: f,
fieldDec: dec,
})
}
return &structDecoder{
fieldMap: caching.NewFieldLookup(fv),
fields: entries,
structName: vt.Name(),
typ: vt,
}
}
|
