mirror of
https://github.com/ncruces/go-sqlite3.git
synced 2026-01-12 05:59:14 +00:00
55 lines
1.7 KiB
Go
55 lines
1.7 KiB
Go
package sqlite3
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/ncruces/go-sqlite3/internal/util"
|
|
"github.com/tetratelabs/wazero"
|
|
"github.com/tetratelabs/wazero/api"
|
|
)
|
|
|
|
// CreateCollation defines a new collating sequence.
|
|
//
|
|
// https://www.sqlite.org/c3ref/create_collation.html
|
|
func (c *Conn) CreateCollation(name string, fn func(a, b []byte) int) error {
|
|
namePtr := c.arena.string(name)
|
|
funcPtr := util.AddHandle(c.ctx, fn)
|
|
r := c.call(c.api.createCollation,
|
|
uint64(c.handle), uint64(namePtr), uint64(funcPtr))
|
|
if err := c.error(r); err != nil {
|
|
util.DelHandle(c.ctx, funcPtr)
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func exportHostFunctions(env wazero.HostModuleBuilder) wazero.HostModuleBuilder {
|
|
util.ExportFuncVI(env, "go_destroy", cbDestroy)
|
|
util.ExportFuncIIIIII(env, "go_compare", cbCompare)
|
|
util.ExportFuncVIII(env, "go_func", cbFunc)
|
|
util.ExportFuncVIII(env, "go_step", cbStep)
|
|
util.ExportFuncVI(env, "go_final", cbFinal)
|
|
util.ExportFuncVI(env, "go_value", cbValue)
|
|
util.ExportFuncVIII(env, "go_inverse", cbInverse)
|
|
return env
|
|
}
|
|
|
|
func cbDestroy(ctx context.Context, mod api.Module, pArg uint32) {
|
|
util.DelHandle(ctx, pArg)
|
|
}
|
|
|
|
func cbCompare(ctx context.Context, mod api.Module, pArg, nKey1, pKey1, nKey2, pKey2 uint32) uint32 {
|
|
fn := util.GetHandle(ctx, pArg).(func(a, b []byte) int)
|
|
return uint32(fn(util.View(mod, pKey1, uint64(nKey1)), util.View(mod, pKey2, uint64(nKey2))))
|
|
}
|
|
|
|
func cbFunc(ctx context.Context, mod api.Module, pCtx, nArg, pArg uint32) {}
|
|
|
|
func cbStep(ctx context.Context, mod api.Module, pCtx, nArg, pArg uint32) {}
|
|
|
|
func cbFinal(ctx context.Context, mod api.Module, pCtx uint32) {}
|
|
|
|
func cbValue(ctx context.Context, mod api.Module, pCtx uint32) {}
|
|
|
|
func cbInverse(ctx context.Context, mod api.Module, pCtx, nArg, pArg uint32) {}
|