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wip: Restore db from file.

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Spencer Brower
2026-05-03 13:03:14 -04:00
parent 8f2c241963
commit 346452accf
6 changed files with 272 additions and 82 deletions
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44
zig-vendor/zig-sqlite/vtab.zig
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@@ -766,7 +766,8 @@ pub fn VirtualTable(
//
const nullable_state: ?*State = @fieldParentPtr("vtab", vtab);
const vtab_ptr: *c.sqlite3_vtab = @ptrCast(vtab);
const nullable_state: ?*State = @fieldParentPtr("vtab", vtab_ptr);
const state = nullable_state orelse unreachable;
var arena = heap.ArenaAllocator.init(state.module_context.allocator);
@@ -789,7 +790,8 @@ pub fn VirtualTable(
}
fn xDisconnect(vtab: [*c]c.sqlite3_vtab) callconv(.c) c_int {
const nullable_state: ?*State = @fieldParentPtr("vtab", vtab);
const vtab_ptr: *c.sqlite3_vtab = @ptrCast(vtab);
const nullable_state: ?*State = @fieldParentPtr("vtab", vtab_ptr);
const state = nullable_state orelse unreachable;
state.deinit();
@@ -806,7 +808,8 @@ pub fn VirtualTable(
}
fn xOpen(vtab: [*c]c.sqlite3_vtab, vtab_cursor: [*c][*c]c.sqlite3_vtab_cursor) callconv(.c) c_int {
const nullable_state: ?*State = @fieldParentPtr("vtab", vtab);
const vtab_ptr: *c.sqlite3_vtab = @ptrCast(vtab);
const nullable_state: ?*State = @fieldParentPtr("vtab", vtab_ptr);
const state = nullable_state orelse unreachable;
const cursor_state = CursorState.init(state.module_context, state.table) catch |err| {
@@ -819,7 +822,8 @@ pub fn VirtualTable(
}
fn xClose(vtab_cursor: [*c]c.sqlite3_vtab_cursor) callconv(.c) c_int {
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor);
const vtab_cursor_ptr: *c.sqlite3_vtab_cursor = @ptrCast(vtab_cursor);
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor_ptr);
const cursor_state = nullable_cursor_state orelse unreachable;
cursor_state.deinit();
@@ -828,7 +832,8 @@ pub fn VirtualTable(
}
fn xEof(vtab_cursor: [*c]c.sqlite3_vtab_cursor) callconv(.c) c_int {
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor);
const vtab_cursor_ptr: *c.sqlite3_vtab_cursor = @ptrCast(vtab_cursor);
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor_ptr);
const cursor_state = nullable_cursor_state orelse unreachable;
const cursor = cursor_state.cursor;
@@ -866,7 +871,8 @@ pub fn VirtualTable(
}
fn xFilter(vtab_cursor: [*c]c.sqlite3_vtab_cursor, idx_num: c_int, idx_str: [*c]const u8, argc: c_int, argv: [*c]?*c.sqlite3_value) callconv(.c) c_int {
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor);
const vtab_cursor_ptr: *c.sqlite3_vtab_cursor = @ptrCast(vtab_cursor);
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor_ptr);
const cursor_state = nullable_cursor_state orelse unreachable;
const cursor = cursor_state.cursor;
@@ -892,7 +898,8 @@ pub fn VirtualTable(
}
fn xNext(vtab_cursor: [*c]c.sqlite3_vtab_cursor) callconv(.c) c_int {
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor);
const vtab_cursor_ptr: *c.sqlite3_vtab_cursor = @ptrCast(vtab_cursor);
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor_ptr);
const cursor_state = nullable_cursor_state orelse unreachable;
const cursor = cursor_state.cursor;
@@ -911,7 +918,8 @@ pub fn VirtualTable(
}
fn xColumn(vtab_cursor: [*c]c.sqlite3_vtab_cursor, ctx: ?*c.sqlite3_context, n: c_int) callconv(.c) c_int {
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor);
const vtab_cursor_ptr: *c.sqlite3_vtab_cursor = @ptrCast(vtab_cursor);
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor_ptr);
const cursor_state = nullable_cursor_state orelse unreachable;
const cursor = cursor_state.cursor;
@@ -955,7 +963,8 @@ pub fn VirtualTable(
}
fn xRowid(vtab_cursor: [*c]c.sqlite3_vtab_cursor, row_id_ptr: [*c]c.sqlite3_int64) callconv(.c) c_int {
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor);
const vtab_cursor_ptr: *c.sqlite3_vtab_cursor = @ptrCast(vtab_cursor);
const nullable_cursor_state: ?*CursorState = @fieldParentPtr("vtab_cursor", vtab_cursor_ptr);
const cursor_state = nullable_cursor_state orelse unreachable;
const cursor = cursor_state.cursor;
@@ -1023,7 +1032,9 @@ const TestVirtualTable = struct {
//
const data = &[_][]const u8{
"Vincent", "José", "Michel",
"Vincent",
"José",
"Michel",
};
var rand = std.Random.DefaultPrng.init(204882485);
@@ -1064,13 +1075,18 @@ const TestVirtualTable = struct {
debug.print("connect\n", .{});
}
pub const BuildBestIndexError = error{} || mem.Allocator.Error;
pub const BuildBestIndexError = error{} || mem.Allocator.Error || error{WriteFailed};
pub fn buildBestIndex(self: *TestVirtualTable, diags: *VTabDiagnostics, builder: *BestIndexBuilder) BuildBestIndexError!void {
pub fn buildBestIndex(
self: *TestVirtualTable,
diags: *VTabDiagnostics,
builder: *BestIndexBuilder,
) BuildBestIndexError!void {
_ = self;
_ = diags;
var id_str_writer = builder.id_str_buffer.writer(builder.allocator);
// var id_str_writer = builder.id_str_buffer.writer(builder.allocator);
var id_str_writer = std.Io.Writer.fromArrayList(&builder.id_str_buffer);
var argv_index: i32 = 0;
for (builder.constraints) |*constraint| {
@@ -1174,7 +1190,7 @@ const TestVirtualTableCursor = struct {
// 3 chars for the '=' marker
// 6 chars because we format all columns in a 6 char wide string
const col_str = id[pos + 1 .. pos + 1 + 6];
const col = try fmt.parseInt(i32, mem.trimRight(u8, col_str, " "), 10);
const col = try fmt.parseInt(i32, mem.trimEnd(u8, col_str, " "), 10);
id = id[pos + 1 + 6 ..];