/
value_json.go
196 lines (160 loc) · 3.38 KB
/
value_json.go
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// transform golang native value into json encoded value.
// cnf: -
package gson
import "fmt"
import "strconv"
import "encoding/json"
func value2json(value interface{}, out []byte, config *Config) int {
var err error
var outsl []byte
if value == nil {
return copy(out, "null")
}
switch v := value.(type) {
case bool:
if v {
return copy(out, "true")
}
return copy(out, "false")
case byte:
out = strconv.AppendInt(out[:0], int64(v), 10)
return len(out)
case int8:
out = strconv.AppendInt(out[:0], int64(v), 10)
return len(out)
case int16:
out = strconv.AppendInt(out[:0], int64(v), 10)
return len(out)
case uint16:
out = strconv.AppendInt(out[:0], int64(v), 10)
return len(out)
case int32:
out = strconv.AppendInt(out[:0], int64(v), 10)
return len(out)
case uint32:
out = strconv.AppendInt(out[:0], int64(v), 10)
return len(out)
case int:
out = strconv.AppendFloat(out[:0], float64(v), 'f', -1, 64)
return len(out)
case uint:
out = strconv.AppendFloat(out[:0], float64(v), 'f', -1, 64)
return len(out)
case int64:
switch config.nk {
case FloatNumber:
out = strconv.AppendFloat(out[:0], float64(v), 'f', -1, 64)
case SmartNumber:
out = strconv.AppendInt(out[:0], v, 10)
default:
panic(fmt.Errorf("unknown number kind %v", config.nk))
}
return len(out)
case uint64:
switch config.nk {
case FloatNumber:
out = strconv.AppendFloat(out[:0], float64(v), 'f', -1, 64)
case SmartNumber:
out = strconv.AppendUint(out[:0], v, 10)
default:
panic(fmt.Errorf("unknown number kind %v", config.nk))
}
return len(out)
case float32:
out = strconv.AppendFloat(out[:0], float64(v), 'f', -1, 64)
return len(out)
case float64:
out = strconv.AppendFloat(out[:0], v, 'f', -1, 64)
return len(out)
case string:
out, err = encodeString(str2bytes(v), out[:0])
if err != nil {
panic("error encoding string")
}
return len(out)
case json.Number:
return copy(out, v)
case []interface{}:
n := 0
out[n] = '['
n++
for i, x := range v {
n += value2json(x, out[n:], config)
if i < len(v)-1 {
out[n] = ','
n++
}
}
out[n] = ']'
n++
return n
case map[string]interface{}:
n := 0
out[n] = '{'
n++
mkeys := config.mkeysh.getmkeys(len(v))
count := len(v)
for _, key := range mkeys.sortProps1(v) {
outsl, err = encodeString(str2bytes(key), out[n:n])
if err != nil {
panic("error encoding key")
}
n += len(outsl)
out[n] = ':'
n++
n += value2json(v[key], out[n:], config)
count--
if count > 0 {
out[n] = ','
n++
}
}
out[n] = '}'
n++
config.mkeysh.putmkeys(mkeys)
return n
case map[string]uint64:
n := 0
out[n] = '{'
n++
mkeys := config.mkeysh.getmkeys(len(v))
count := len(v)
for _, key := range mkeys.sortProps2(v) {
outsl, err = encodeString(str2bytes(key), out[n:n])
if err != nil {
panic("error encoding key")
}
n += len(outsl)
out[n] = ':'
n++
n += value2json(v[key], out[n:], config)
count--
if count > 0 {
out[n] = ','
n++
}
}
out[n] = '}'
n++
config.mkeysh.putmkeys(mkeys)
return n
case [][2]interface{}:
n := 0
out[n] = '{'
n++
for i, item := range v {
n += value2json(item[0], out[n:], config)
out[n] = ':'
n++
n += value2json(item[1], out[n:], config)
if i < len(v)-1 {
out[n] = ','
n++
}
}
out[n] = '}'
n++
return n
}
return 0
}