func goToFloat(value interface{}, nullable bool) unsafe.Pointer {
switch v := value.(type) {
case float32:
return unsafe.Pointer(C.cfish_Float_new(C.double(v)))
case float64:
return unsafe.Pointer(C.cfish_Float_new(C.double(v)))
case Obj:
certifyCF(v, C.CFISH_FLOAT, nullable)
return unsafe.Pointer(C.cfish_incref(unsafe.Pointer(v.TOPTR())))
}
mess := fmt.Sprintf("Can't convert %T to clownfish.Float", value)
panic(NewErr(mess))
}
//export GOLUCY_DefDocReader_Fetch_Doc
func GOLUCY_DefDocReader_Fetch_Doc(ddr *C.lucy_DefaultDocReader,
docID C.int32_t) *C.lucy_HitDoc {
ivars := C.lucy_DefDocReader_IVARS(ddr)
schema := ivars.schema
datInstream := ivars.dat_in
ixInstream := ivars.ix_in
fields := C.cfish_Hash_new(1)
fieldNameCap := C.size_t(31)
var fieldName *C.char = ((*C.char)(C.malloc(fieldNameCap + 1)))
// Get data file pointer from index, read number of fields.
C.LUCY_InStream_Seek(ixInstream, C.int64_t(docID*8))
start := C.LUCY_InStream_Read_U64(ixInstream)
C.LUCY_InStream_Seek(datInstream, C.int64_t(start))
numFields := uint32(C.LUCY_InStream_Read_C32(datInstream))
// Decode stored data and build up the doc field by field.
for i := uint32(0); i < numFields; i++ {
// Read field name.
fieldNameLen := C.size_t(C.LUCY_InStream_Read_C32(datInstream))
if fieldNameLen > fieldNameCap {
fieldNameCap = fieldNameLen
fieldName = ((*C.char)(C.realloc(unsafe.Pointer(fieldName), fieldNameCap+1)))
}
C.LUCY_InStream_Read_Bytes(datInstream, fieldName, fieldNameLen)
// Find the Field's FieldType.
// TODO: Creating and destroying a new string each time is
// inefficient. The solution should be to add a privte
// Schema_Fetch_Type_Utf8 method which takes char* and size_t.
fieldNameStr := C.cfish_Str_new_from_utf8(fieldName, fieldNameLen)
fieldType := C.LUCY_Schema_Fetch_Type(schema, fieldNameStr)
C.cfish_dec_refcount(unsafe.Pointer(fieldNameStr))
// Read the field value.
var value *C.cfish_Obj
switch C.LUCY_FType_Primitive_ID(fieldType) & C.lucy_FType_PRIMITIVE_ID_MASK {
case C.lucy_FType_TEXT:
valueLen := C.size_t(C.LUCY_InStream_Read_C32(datInstream))
buf := ((*C.char)(C.malloc(valueLen + 1)))
C.LUCY_InStream_Read_Bytes(datInstream, buf, valueLen)
C.null_terminate_string(buf, valueLen)
value = ((*C.cfish_Obj)(C.cfish_Str_new_steal_utf8(buf, valueLen)))
case C.lucy_FType_BLOB:
valueLen := C.size_t(C.LUCY_InStream_Read_C32(datInstream))
buf := ((*C.char)(C.malloc(valueLen)))
C.LUCY_InStream_Read_Bytes(datInstream, buf, valueLen)
value = ((*C.cfish_Obj)(C.cfish_Blob_new_steal(buf, valueLen)))
case C.lucy_FType_FLOAT32:
value = ((*C.cfish_Obj)(C.cfish_Float_new(C.double(C.LUCY_InStream_Read_F32(datInstream)))))
case C.lucy_FType_FLOAT64:
value = ((*C.cfish_Obj)(C.cfish_Float_new(C.LUCY_InStream_Read_F64(datInstream))))
case C.lucy_FType_INT32:
value = ((*C.cfish_Obj)(C.cfish_Int_new(C.int64_t(C.LUCY_InStream_Read_C32(datInstream)))))
case C.lucy_FType_INT64:
value = ((*C.cfish_Obj)(C.cfish_Int_new(C.int64_t(C.LUCY_InStream_Read_C64(datInstream)))))
default:
value = nil
panic(clownfish.NewErr("Internal Lucy error: bad type id for field " +
C.GoStringN(fieldName, C.int(fieldNameLen))))
}
// Store the value.
C.CFISH_Hash_Store_Utf8(fields, fieldName, fieldNameLen, value)
}
C.free(unsafe.Pointer(fieldName))
retval := C.lucy_HitDoc_new(unsafe.Pointer(fields), docID, 0.0)
C.cfish_dec_refcount(unsafe.Pointer(fields))
return retval
}