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package native
import (
"github.com/ziutek/mymysql/mysql"
"time"
"unsafe"
)
type paramValue struct {
typ uint16
addr unsafe.Pointer
raw bool
length int // >=0 - length of value, <0 - unknown length
}
func (pv *paramValue) SetAddr(addr uintptr) {
pv.addr = unsafe.Pointer(addr)
}
func (val *paramValue) Len() int {
if val.addr == nil {
// Invalid Value was binded
return 0
}
// val.addr always points to the pointer - lets dereference it
ptr := *(*unsafe.Pointer)(val.addr)
if ptr == nil {
// Binded Ptr Value is nil
return 0
}
if val.length >= 0 {
return val.length
}
switch val.typ {
case MYSQL_TYPE_STRING:
return lenStr(*(*string)(ptr))
case MYSQL_TYPE_DATE:
return lenDate(*(*mysql.Date)(ptr))
case MYSQL_TYPE_TIMESTAMP, MYSQL_TYPE_DATETIME:
return lenTime(*(*time.Time)(ptr))
case MYSQL_TYPE_TIME:
return lenDuration(*(*time.Duration)(ptr))
case MYSQL_TYPE_TINY: // val.length < 0 so this is bool
return 1
}
// MYSQL_TYPE_VAR_STRING, MYSQL_TYPE_BLOB and type of Raw value
return lenBin(*(*[]byte)(ptr))
}
func (pw *pktWriter) writeValue(val *paramValue) {
if val.addr == nil {
// Invalid Value was binded
return
}
// val.addr always points to the pointer - lets dereference it
ptr := *(*unsafe.Pointer)(val.addr)
if ptr == nil {
// Binded Ptr Value is nil
return
}
if val.raw || val.typ == MYSQL_TYPE_VAR_STRING ||
val.typ == MYSQL_TYPE_BLOB {
pw.writeBin(*(*[]byte)(ptr))
return
}
// We don't need unsigned bit to check type
switch val.typ & ^MYSQL_UNSIGNED_MASK {
case MYSQL_TYPE_NULL:
// Don't write null values
case MYSQL_TYPE_STRING:
s := *(*string)(ptr)
pw.writeBin([]byte(s))
case MYSQL_TYPE_LONG, MYSQL_TYPE_FLOAT:
pw.writeU32(*(*uint32)(ptr))
case MYSQL_TYPE_SHORT:
pw.writeU16(*(*uint16)(ptr))
case MYSQL_TYPE_TINY:
if val.length == -1 {
// Translate bool value to MySQL tiny
if *(*bool)(ptr) {
pw.writeByte(1)
} else {
pw.writeByte(0)
}
} else {
pw.writeByte(*(*byte)(ptr))
}
case MYSQL_TYPE_LONGLONG, MYSQL_TYPE_DOUBLE:
pw.writeU64(*(*uint64)(ptr))
case MYSQL_TYPE_DATE:
pw.writeDate(*(*mysql.Date)(ptr))
case MYSQL_TYPE_TIMESTAMP, MYSQL_TYPE_DATETIME:
pw.writeTime(*(*time.Time)(ptr))
case MYSQL_TYPE_TIME:
pw.writeDuration(*(*time.Duration)(ptr))
default:
panic(mysql.ErrBindUnkType)
}
return
}
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