hanzo-devandClaude Opus 4.8
764539773a
Fork of ncruces/go-sqlite3 (MIT, retained). Renames module to github.com/hanzoai/sqlite3 (wasm blob stays upstream ncruces/go-sqlite3-wasm) and adds the hanzovfs package: a pure-Go, no-FUSE SQLite VFS that seals pages with ChaCha20-Poly1305 (per-tenant DEK, HIP-0302) for per-tenant SQLite ⇒ hanzoai/vfs ⇒ S3. Deprecates modernc.org/sqlite (no custom-VFS hook) and direct ncruces use. Benchmarked 3.6x faster writes / ~92x faster point-reads than FUSE; encryption ~free. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
73 lines
1.5 KiB
Go
73 lines
1.5 KiB
Go
// Package zorder provides functions for z-order transformations.
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//
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// https://sqlite.org/src/doc/tip/ext/misc/zorder.c
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package zorder
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import (
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"errors"
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"github.com/hanzoai/sqlite3"
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"github.com/hanzoai/sqlite3/internal/errutil"
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)
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// Register registers the zorder and unzorder SQL functions.
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func Register(db *sqlite3.Conn) error {
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const flags = sqlite3.DETERMINISTIC | sqlite3.INNOCUOUS
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return errors.Join(
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db.CreateFunction("zorder", -1, flags, zorder),
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db.CreateFunction("unzorder", 3, flags, unzorder))
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}
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func zorder(ctx sqlite3.Context, arg ...sqlite3.Value) {
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var x [24]int64
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if n := len(arg); n < 2 || n > 24 {
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ctx.ResultError(errutil.ErrorString("zorder: needs between 2 and 24 dimensions"))
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return
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}
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for i := range arg {
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x[i] = arg[i].Int64()
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}
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var z int64
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for i := range 63 {
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j := i % len(arg)
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z |= (x[j] & 1) << i
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x[j] >>= 1
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}
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for i := range arg {
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if x[i] != 0 {
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ctx.ResultError(errutil.ErrorString("zorder: argument out of range"))
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return
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}
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}
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ctx.ResultInt64(z)
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}
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func unzorder(ctx sqlite3.Context, arg ...sqlite3.Value) {
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i := arg[2].Int64()
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n := arg[1].Int64()
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z := arg[0].Int64()
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if n < 2 || n > 24 {
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ctx.ResultError(errutil.ErrorString("unzorder: needs between 2 and 24 dimensions"))
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return
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}
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if i < 0 || i >= n {
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ctx.ResultError(errutil.ErrorString("unzorder: index out of range"))
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return
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}
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if z < 0 {
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ctx.ResultError(errutil.ErrorString("unzorder: argument out of range"))
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return
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}
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var k int
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var x int64
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for j := i; j < 63; j += n {
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x |= ((z >> j) & 1) << k
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k++
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}
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ctx.ResultInt64(x)
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}
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