use std::ffi::c_void;
use crate::{
fixed_sized::Bit,
handles::{CData, CDataMut},
Error, RowSetBuffer,
};
use super::{
column_with_indicator::{
OptBitColumn, OptDateColumn, OptF32Column, OptF64Column, OptI16Column, OptI32Column,
OptI64Column, OptI8Column, OptIt, OptTimeColumn, OptTimestampColumn, OptU8Column,
},
BufferDescription, BufferKind, TextColumn, TextColumnIt,
};
use odbc_sys::{CDataType, Date, Time, Timestamp};
#[derive(Debug)]
pub enum AnyColumnView<'a> {
Text(TextColumnIt<'a>),
Date(&'a [Date]),
Time(&'a [Time]),
Timestamp(&'a [Timestamp]),
F64(&'a [f64]),
F32(&'a [f32]),
I8(&'a [i8]),
I16(&'a [i16]),
I32(&'a [i32]),
I64(&'a [i64]),
U8(&'a [u8]),
Bit(&'a [Bit]),
NullableDate(OptIt<'a, Date>),
NullableTime(OptIt<'a, Time>),
NullableTimestamp(OptIt<'a, Timestamp>),
NullableF64(OptIt<'a, f64>),
NullableF32(OptIt<'a, f32>),
NullableI8(OptIt<'a, i8>),
NullableI16(OptIt<'a, i16>),
NullableI32(OptIt<'a, i32>),
NullableI64(OptIt<'a, i64>),
NullableU8(OptIt<'a, u8>),
NullableBit(OptIt<'a, Bit>),
}
#[derive(Debug)]
enum AnyColumnBuffer {
Text(TextColumn),
Date(Vec<Date>),
Time(Vec<Time>),
Timestamp(Vec<Timestamp>),
F64(Vec<f64>),
F32(Vec<f32>),
I8(Vec<i8>),
I16(Vec<i16>),
I32(Vec<i32>),
I64(Vec<i64>),
U8(Vec<u8>),
Bit(Vec<Bit>),
NullableDate(OptDateColumn),
NullableTime(OptTimeColumn),
NullableTimestamp(OptTimestampColumn),
NullableF64(OptF64Column),
NullableF32(OptF32Column),
NullableI8(OptI8Column),
NullableI16(OptI16Column),
NullableI32(OptI32Column),
NullableI64(OptI64Column),
NullableU8(OptU8Column),
NullableBit(OptBitColumn),
}
impl AnyColumnBuffer {
pub fn new(max_rows: u32, desc: BufferDescription) -> Self {
match (desc.kind, desc.nullable) {
(BufferKind::Text { max_str_len }, _) => {
AnyColumnBuffer::Text(TextColumn::new(max_rows as usize, max_str_len))
}
(BufferKind::Date, false) => {
AnyColumnBuffer::Date(vec![Date::default(); max_rows as usize])
}
(BufferKind::Time, false) => {
AnyColumnBuffer::Time(vec![Time::default(); max_rows as usize])
}
(BufferKind::Timestamp, false) => {
AnyColumnBuffer::Timestamp(vec![Timestamp::default(); max_rows as usize])
}
(BufferKind::F64, false) => {
AnyColumnBuffer::F64(vec![f64::default(); max_rows as usize])
}
(BufferKind::F32, false) => {
AnyColumnBuffer::F32(vec![f32::default(); max_rows as usize])
}
(BufferKind::I8, false) => AnyColumnBuffer::I8(vec![i8::default(); max_rows as usize]),
(BufferKind::I16, false) => {
AnyColumnBuffer::I16(vec![i16::default(); max_rows as usize])
}
(BufferKind::I32, false) => {
AnyColumnBuffer::I32(vec![i32::default(); max_rows as usize])
}
(BufferKind::I64, false) => {
AnyColumnBuffer::I64(vec![i64::default(); max_rows as usize])
}
(BufferKind::U8, false) => AnyColumnBuffer::U8(vec![u8::default(); max_rows as usize]),
(BufferKind::Bit, false) => {
AnyColumnBuffer::Bit(vec![Bit::default(); max_rows as usize])
}
(BufferKind::Date, true) => {
AnyColumnBuffer::NullableDate(OptDateColumn::new(max_rows as usize))
}
(BufferKind::Time, true) => {
AnyColumnBuffer::NullableTime(OptTimeColumn::new(max_rows as usize))
}
(BufferKind::Timestamp, true) => {
AnyColumnBuffer::NullableTimestamp(OptTimestampColumn::new(max_rows as usize))
}
(BufferKind::F64, true) => {
AnyColumnBuffer::NullableF64(OptF64Column::new(max_rows as usize))
}
(BufferKind::F32, true) => {
AnyColumnBuffer::NullableF32(OptF32Column::new(max_rows as usize))
}
(BufferKind::I8, true) => {
AnyColumnBuffer::NullableI8(OptI8Column::new(max_rows as usize))
}
(BufferKind::I16, true) => {
AnyColumnBuffer::NullableI16(OptI16Column::new(max_rows as usize))
}
(BufferKind::I32, true) => {
AnyColumnBuffer::NullableI32(OptI32Column::new(max_rows as usize))
}
(BufferKind::I64, true) => {
AnyColumnBuffer::NullableI64(OptI64Column::new(max_rows as usize))
}
(BufferKind::U8, true) => {
AnyColumnBuffer::NullableU8(OptU8Column::new(max_rows as usize))
}
(BufferKind::Bit, true) => {
AnyColumnBuffer::NullableBit(OptBitColumn::new(max_rows as usize))
}
}
}
fn inner_cdata(&self) -> &dyn CData {
match self {
AnyColumnBuffer::Text(col) => col,
AnyColumnBuffer::F64(col) => col,
AnyColumnBuffer::F32(col) => col,
AnyColumnBuffer::Date(col) => col,
AnyColumnBuffer::Time(col) => col,
AnyColumnBuffer::Timestamp(col) => col,
AnyColumnBuffer::I8(col) => col,
AnyColumnBuffer::I16(col) => col,
AnyColumnBuffer::I32(col) => col,
AnyColumnBuffer::I64(col) => col,
AnyColumnBuffer::Bit(col) => col,
AnyColumnBuffer::U8(col) => col,
AnyColumnBuffer::NullableF64(col) => col,
AnyColumnBuffer::NullableF32(col) => col,
AnyColumnBuffer::NullableDate(col) => col,
AnyColumnBuffer::NullableTime(col) => col,
AnyColumnBuffer::NullableTimestamp(col) => col,
AnyColumnBuffer::NullableI8(col) => col,
AnyColumnBuffer::NullableI16(col) => col,
AnyColumnBuffer::NullableI32(col) => col,
AnyColumnBuffer::NullableI64(col) => col,
AnyColumnBuffer::NullableBit(col) => col,
AnyColumnBuffer::NullableU8(col) => col,
}
}
fn inner_cdata_mut(&mut self) -> &mut dyn CDataMut {
match self {
AnyColumnBuffer::Text(col) => col,
AnyColumnBuffer::F64(col) => col,
AnyColumnBuffer::F32(col) => col,
AnyColumnBuffer::Date(col) => col,
AnyColumnBuffer::Time(col) => col,
AnyColumnBuffer::Timestamp(col) => col,
AnyColumnBuffer::I8(col) => col,
AnyColumnBuffer::I16(col) => col,
AnyColumnBuffer::I32(col) => col,
AnyColumnBuffer::I64(col) => col,
AnyColumnBuffer::Bit(col) => col,
AnyColumnBuffer::U8(col) => col,
AnyColumnBuffer::NullableF64(col) => col,
AnyColumnBuffer::NullableF32(col) => col,
AnyColumnBuffer::NullableDate(col) => col,
AnyColumnBuffer::NullableTime(col) => col,
AnyColumnBuffer::NullableTimestamp(col) => col,
AnyColumnBuffer::NullableI8(col) => col,
AnyColumnBuffer::NullableI16(col) => col,
AnyColumnBuffer::NullableI32(col) => col,
AnyColumnBuffer::NullableI64(col) => col,
AnyColumnBuffer::NullableBit(col) => col,
AnyColumnBuffer::NullableU8(col) => col,
}
}
pub unsafe fn view(&self, num_rows: usize) -> AnyColumnView {
match self {
AnyColumnBuffer::Text(col) => AnyColumnView::Text(col.iter(num_rows)),
AnyColumnBuffer::Date(col) => AnyColumnView::Date(&col[0..num_rows]),
AnyColumnBuffer::Time(col) => AnyColumnView::Time(&col[0..num_rows]),
AnyColumnBuffer::Timestamp(col) => AnyColumnView::Timestamp(&col[0..num_rows]),
AnyColumnBuffer::F64(col) => AnyColumnView::F64(&col[0..num_rows]),
AnyColumnBuffer::F32(col) => AnyColumnView::F32(&col[0..num_rows]),
AnyColumnBuffer::I8(col) => AnyColumnView::I8(&col[0..num_rows]),
AnyColumnBuffer::I16(col) => AnyColumnView::I16(&col[0..num_rows]),
AnyColumnBuffer::I32(col) => AnyColumnView::I32(&col[0..num_rows]),
AnyColumnBuffer::I64(col) => AnyColumnView::I64(&col[0..num_rows]),
AnyColumnBuffer::U8(col) => AnyColumnView::U8(&col[0..num_rows]),
AnyColumnBuffer::Bit(col) => AnyColumnView::Bit(&col[0..num_rows]),
AnyColumnBuffer::NullableDate(col) => AnyColumnView::NullableDate(col.iter(num_rows)),
AnyColumnBuffer::NullableTime(col) => AnyColumnView::NullableTime(col.iter(num_rows)),
AnyColumnBuffer::NullableTimestamp(col) => {
AnyColumnView::NullableTimestamp(col.iter(num_rows))
}
AnyColumnBuffer::NullableF64(col) => AnyColumnView::NullableF64(col.iter(num_rows)),
AnyColumnBuffer::NullableF32(col) => AnyColumnView::NullableF32(col.iter(num_rows)),
AnyColumnBuffer::NullableI8(col) => AnyColumnView::NullableI8(col.iter(num_rows)),
AnyColumnBuffer::NullableI16(col) => AnyColumnView::NullableI16(col.iter(num_rows)),
AnyColumnBuffer::NullableI32(col) => AnyColumnView::NullableI32(col.iter(num_rows)),
AnyColumnBuffer::NullableI64(col) => AnyColumnView::NullableI64(col.iter(num_rows)),
AnyColumnBuffer::NullableU8(col) => AnyColumnView::NullableU8(col.iter(num_rows)),
AnyColumnBuffer::NullableBit(col) => AnyColumnView::NullableBit(col.iter(num_rows)),
}
}
}
unsafe impl CData for AnyColumnBuffer {
fn cdata_type(&self) -> CDataType {
self.inner_cdata().cdata_type()
}
fn indicator_ptr(&self) -> *const isize {
self.inner_cdata().indicator_ptr()
}
fn value_ptr(&self) -> *const c_void {
self.inner_cdata().value_ptr()
}
fn buffer_length(&self) -> isize {
self.inner_cdata().buffer_length()
}
}
unsafe impl CDataMut for AnyColumnBuffer {
fn mut_indicator_ptr(&mut self) -> *mut isize {
self.inner_cdata_mut().mut_indicator_ptr()
}
fn mut_value_ptr(&mut self) -> *mut c_void {
self.inner_cdata_mut().mut_value_ptr()
}
}
pub struct ColumnarRowSet {
num_rows: Box<usize>,
max_rows: u32,
columns: Vec<AnyColumnBuffer>,
}
impl ColumnarRowSet {
pub fn new(max_rows: u32, description: impl Iterator<Item = BufferDescription>) -> Self {
let columns = description
.map(|desc| AnyColumnBuffer::new(max_rows, desc))
.collect();
ColumnarRowSet {
num_rows: Box::new(0),
max_rows,
columns,
}
}
pub fn column(&self, column_index: usize) -> AnyColumnView<'_> {
unsafe { self.columns[column_index].view(*self.num_rows) }
}
pub fn num_rows(&self) -> usize {
*self.num_rows
}
}
unsafe impl RowSetBuffer for ColumnarRowSet {
fn bind_type(&self) -> u32 {
0
}
fn row_array_size(&self) -> u32 {
self.max_rows
}
fn mut_num_fetch_rows(&mut self) -> &mut usize {
self.num_rows.as_mut()
}
unsafe fn bind_to_cursor(&mut self, cursor: &mut impl crate::Cursor) -> Result<(), Error> {
let mut col_number = 1;
for column in &mut self.columns {
cursor.bind_col(col_number, column)?;
col_number += 1;
}
Ok(())
}
}