Rename sql3util.

ext/closure/closure.go

@@ -12,7 +12,7 @@ import (
 
 	"github.com/ncruces/go-sqlite3"
 	"github.com/ncruces/go-sqlite3/internal/util"
-	"github.com/ncruces/go-sqlite3/util/vtabutil"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
 )
 
 const (
@@ -39,17 +39,17 @@ func Register(db *sqlite3.Conn) error {
 			)
 
 			for _, arg := range arg {
-				key, val := vtabutil.NamedArg(arg)
+				key, val := sql3util.NamedArg(arg)
 				if done.Contains(key) {
 					return nil, fmt.Errorf("transitive_closure: more than one %q parameter", key)
 				}
 				switch key {
 				case "tablename":
-					table = vtabutil.Unquote(val)
+					table = sql3util.Unquote(val)
 				case "idcolumn":
-					column = vtabutil.Unquote(val)
+					column = sql3util.Unquote(val)
 				case "parentcolumn":
-					parent = vtabutil.Unquote(val)
+					parent = sql3util.Unquote(val)
 				default:
 					return nil, fmt.Errorf("transitive_closure: unknown %q parameter", key)
 				}

ext/csv/arg.go

@@ -4,8 +4,7 @@ import (
 	"fmt"
 	"strconv"
 
-	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
-	"github.com/ncruces/go-sqlite3/util/vtabutil"
 )
 
 func uintArg(key, val string) (int, error) {
@@ -20,7 +19,7 @@ func boolArg(key, val string) (bool, error) {
 	if val == "" {
 		return true, nil
 	}
-	b, ok := util.ParseBool(val)
+	b, ok := sql3util.ParseBool(val)
 	if ok {
 		return b, nil
 	}
@@ -28,7 +27,7 @@ func boolArg(key, val string) (bool, error) {
 }
 
 func runeArg(key, val string) (rune, error) {
-	r, _, tail, err := strconv.UnquoteChar(vtabutil.Unquote(val), 0)
+	r, _, tail, err := strconv.UnquoteChar(sql3util.Unquote(val), 0)
 	if tail != "" || err != nil {
 		return 0, fmt.Errorf("csv: invalid %q parameter: %s", key, val)
 	}

ext/csv/arg_test.go

@@ -3,7 +3,7 @@ package csv
 import (
 	"testing"
 
-	"github.com/ncruces/go-sqlite3/util/vtabutil"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
 )
 
 func Test_uintArg(t *testing.T) {
@@ -24,7 +24,7 @@ func Test_uintArg(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.arg, func(t *testing.T) {
-			key, val := vtabutil.NamedArg(tt.arg)
+			key, val := sql3util.NamedArg(tt.arg)
 			if key != tt.key {
 				t.Errorf("NamedArg() %v, want err %v", key, tt.key)
 			}
@@ -62,7 +62,7 @@ func Test_boolArg(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.arg, func(t *testing.T) {
-			key, val := vtabutil.NamedArg(tt.arg)
+			key, val := sql3util.NamedArg(tt.arg)
 			if key != tt.key {
 				t.Errorf("NamedArg() %v, want err %v", key, tt.key)
 			}
@@ -96,7 +96,7 @@ func Test_runeArg(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.arg, func(t *testing.T) {
-			key, val := vtabutil.NamedArg(tt.arg)
+			key, val := sql3util.NamedArg(tt.arg)
 			if key != tt.key {
 				t.Errorf("NamedArg() %v, want err %v", key, tt.key)
 			}

ext/csv/csv.go

@@ -18,7 +18,7 @@ import (
 	"github.com/ncruces/go-sqlite3"
 	"github.com/ncruces/go-sqlite3/internal/util"
 	"github.com/ncruces/go-sqlite3/util/osutil"
-	"github.com/ncruces/go-sqlite3/util/vtabutil"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
 )
 
 // Register registers the CSV virtual table.
@@ -44,17 +44,17 @@ func RegisterFS(db *sqlite3.Conn, fsys fs.FS) error {
 		)
 
 		for _, arg := range arg {
-			key, val := vtabutil.NamedArg(arg)
+			key, val := sql3util.NamedArg(arg)
 			if done.Contains(key) {
 				return nil, fmt.Errorf("csv: more than one %q parameter", key)
 			}
 			switch key {
 			case "filename":
-				filename = vtabutil.Unquote(val)
+				filename = sql3util.Unquote(val)
 			case "data":
-				data = vtabutil.Unquote(val)
+				data = sql3util.Unquote(val)
 			case "schema":
-				schema = vtabutil.Unquote(val)
+				schema = sql3util.Unquote(val)
 			case "header":
 				header, err = boolArg(key, val)
 			case "columns":

ext/csv/types.go

@@ -3,7 +3,7 @@ package csv
 import (
 	"strings"
 
-	"github.com/ncruces/go-sqlite3/util/vtabutil"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
 )
 
 type affinity byte
@@ -17,7 +17,7 @@ const (
 )
 
 func getColumnAffinities(schema string) ([]affinity, error) {
-	tab, err := vtabutil.Parse(schema)
+	tab, err := sql3util.ParseTable(schema)
 	if err != nil {
 		return nil, err
 	}

internal/util/bool.go

@@ -1,22 +0,0 @@
-package util
-
-import "strings"
-
-func ParseBool(s string) (b, ok bool) {
-	if len(s) == 0 {
-		return false, false
-	}
-	if s[0] == '0' {
-		return false, true
-	}
-	if '1' <= s[0] && s[0] <= '9' {
-		return true, true
-	}
-	switch strings.ToLower(s) {
-	case "true", "yes", "on":
-		return true, true
-	case "false", "no", "off":
-		return false, true
-	}
-	return false, false
-}

internal/util/bool_test.go

@@ -1,28 +0,0 @@
-package util
-
-import "testing"
-
-func TestParseBool(t *testing.T) {
-	tests := []struct {
-		str string
-		val bool
-		ok  bool
-	}{
-		{"", false, false},
-		{"0", false, true},
-		{"1", true, true},
-		{"9", true, true},
-		{"T", false, false},
-		{"true", true, true},
-		{"FALSE", false, true},
-		{"false?", false, false},
-	}
-	for _, tt := range tests {
-		t.Run(tt.str, func(t *testing.T) {
-			gotVal, gotOK := ParseBool(tt.str)
-			if gotVal != tt.val || gotOK != tt.ok {
-				t.Errorf("ParseBool(%q) = (%v, %v) want (%v, %v)", tt.str, gotVal, gotOK, tt.val, tt.ok)
-			}
-		})
-	}
-}

tests/db_test.go

@@ -1,19 +1,17 @@
 package tests
 
 import (
+	_ "embed"
 	"os"
 	"path/filepath"
 	"testing"
 
-	_ "embed"
-
 	"github.com/ncruces/go-sqlite3"
 	_ "github.com/ncruces/go-sqlite3/embed"
 	_ "github.com/ncruces/go-sqlite3/internal/testcfg"
 	"github.com/ncruces/go-sqlite3/vfs"
 	_ "github.com/ncruces/go-sqlite3/vfs/adiantum"
 	"github.com/ncruces/go-sqlite3/vfs/memdb"
-	_ "github.com/ncruces/go-sqlite3/vfs/memdb"
 	_ "github.com/ncruces/go-sqlite3/vfs/xts"
 )
 

util/sql3util/README.md

@@ -1,6 +1,7 @@
-# Virtual Table utility functions 
+# SQLite utility functions 
 
-This package implements utilities mostly useful to virtual table implementations.
+This package implements assorted SQLite utilities
+useful to extension writers.
 
 It also wraps a [parser](https://github.com/marcobambini/sqlite-createtable-parser)
 for the [`CREATE`](https://sqlite.org/lang_createtable.html) and

util/sql3util/arg.go

@@ -1,4 +1,4 @@
-package vtabutil
+package sql3util
 
 import "strings"
 
@@ -17,19 +17,44 @@ func Unquote(val string) string {
 	if len(val) < 2 {
 		return val
 	}
-	if val[0] != val[len(val)-1] {
+	fst := val[0]
+	lst := val[len(val)-1]
+	rst := val[1 : len(val)-1]
+	if fst == '[' && lst == ']' {
+		return rst
+	}
+	if fst != lst {
 		return val
 	}
 	var old, new string
-	switch val[0] {
+	switch fst {
 	default:
 		return val
-	case '"':
-		old, new = `""`, `"`
 	case '`':
 		old, new = "``", "`"
+	case '"':
+		old, new = `""`, `"`
 	case '\'':
 		old, new = `''`, `'`
 	}
-	return strings.ReplaceAll(val[1:len(val)-1], old, new)
+	return strings.ReplaceAll(rst, old, new)
+}
+
+func ParseBool(s string) (b, ok bool) {
+	if len(s) == 0 {
+		return false, false
+	}
+	if s[0] == '0' {
+		return false, true
+	}
+	if '1' <= s[0] && s[0] <= '9' {
+		return true, true
+	}
+	switch strings.ToLower(s) {
+	case "true", "yes", "on":
+		return true, true
+	case "false", "no", "off":
+		return false, true
+	}
+	return false, false
 }

util/sql3util/arg_test.go

@@ -0,0 +1,55 @@
+package sql3util_test
+
+import (
+	"testing"
+
+	"github.com/ncruces/go-sqlite3/util/sql3util"
+)
+
+func TestUnquote(t *testing.T) {
+	tests := []struct {
+		val  string
+		want string
+	}{
+		{"a", "a"},
+		{"abc", "abc"},
+		{"abba", "abba"},
+		{"`ab``c`", "ab`c"},
+		{"'ab''c'", "ab'c"},
+		{"'ab``c'", "ab``c"},
+		{"[ab``c]", "ab``c"},
+		{`"ab""c"`, `ab"c`},
+	}
+	for _, tt := range tests {
+		t.Run(tt.val, func(t *testing.T) {
+			if got := sql3util.Unquote(tt.val); got != tt.want {
+				t.Errorf("Unquote(%s) = %s, want %s", tt.val, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestParseBool(t *testing.T) {
+	tests := []struct {
+		str string
+		val bool
+		ok  bool
+	}{
+		{"", false, false},
+		{"0", false, true},
+		{"1", true, true},
+		{"9", true, true},
+		{"T", false, false},
+		{"true", true, true},
+		{"FALSE", false, true},
+		{"false?", false, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.str, func(t *testing.T) {
+			gotVal, gotOK := sql3util.ParseBool(tt.str)
+			if gotVal != tt.val || gotOK != tt.ok {
+				t.Errorf("ParseBool(%q) = (%v, %v) want (%v, %v)", tt.str, gotVal, gotOK, tt.val, tt.ok)
+			}
+		})
+	}
+}

util/sql3util/const.go

@@ -1,4 +1,4 @@
-package vtabutil
+package sql3util
 
 const (
 	_NONE = iota

util/sql3util/parse.go

@@ -1,10 +1,9 @@
-package vtabutil
+package sql3util
 
 import (
 	"context"
-	"sync"
-
 	_ "embed"
+	"sync"
 
 	"github.com/tetratelabs/wazero"
 	"github.com/tetratelabs/wazero/api"
@@ -25,11 +24,11 @@ var (
 	compiled wazero.CompiledModule
 )
 
-// Parse parses a [CREATE] or [ALTER TABLE] command.
+// ParseTable parses a [CREATE] or [ALTER TABLE] command.
 //
 // [CREATE]: https://sqlite.org/lang_createtable.html
 // [ALTER TABLE]: https://sqlite.org/lang_altertable.html
-func Parse(sql string) (_ *Table, err error) {
+func ParseTable(sql string) (_ *Table, err error) {
 	once.Do(func() {
 		ctx := context.Background()
 		cfg := wazero.NewRuntimeConfigInterpreter()

util/sql3util/parse_test.go

@@ -1,13 +1,13 @@
-package vtabutil_test
+package sql3util_test
 
 import (
 	"testing"
 
-	"github.com/ncruces/go-sqlite3/util/vtabutil"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
 )
 
 func TestParse(t *testing.T) {
-	tab, err := vtabutil.Parse(`CREATE TABLE child(x REFERENCES parent)`)
+	tab, err := sql3util.ParseTable(`CREATE TABLE child(x REFERENCES parent)`)
 	if err != nil {
 		t.Fatal(err)
 	}

util/sql3util/sql3util.go

@@ -0,0 +1,2 @@
+// Package sql3util implements SQLite utilities.
+package sql3util

util/vfsutil/wrap.go

@@ -1,4 +1,4 @@
-// Package vtabutil implements virtual filesystem utilities.
+// Package vfsutil implements virtual filesystem utilities.
 package vfsutil
 
 import (

util/vtabutil/vtabutil.go

@@ -1,2 +0,0 @@
-// Package vtabutil implements virtual table utilities.
-package vtabutil

vfs/memdb/example_test.go

@@ -2,11 +2,10 @@ package memdb_test
 
 import (
 	"database/sql"
+	_ "embed"
 	"fmt"
 	"log"
 
-	_ "embed"
-
 	_ "github.com/ncruces/go-sqlite3/driver"
 	_ "github.com/ncruces/go-sqlite3/embed"
 	"github.com/ncruces/go-sqlite3/vfs/memdb"

vfs/memdb/memdb_test.go

@@ -1,9 +1,8 @@
 package memdb
 
 import (
-	"testing"
-
 	_ "embed"
+	"testing"
 
 	"github.com/ncruces/go-sqlite3"
 	_ "github.com/ncruces/go-sqlite3/embed"

vfs/readervfs/example_test.go

@@ -2,12 +2,11 @@ package readervfs_test
 
 import (
 	"database/sql"
+	_ "embed"
 	"fmt"
 	"log"
 	"strings"
 
-	_ "embed"
-
 	"github.com/psanford/httpreadat"
 
 	_ "github.com/ncruces/go-sqlite3/driver"

vfs/shm.go

@@ -203,6 +203,7 @@ func (s *vfsShm) shmUnmap(delete bool) {
 
 func (s *vfsShm) shmBarrier() {
 	s.Lock()
+	//lint:ignore SA2001 memory barrier.
 	s.Unlock()
 }
 

vfs/shm_bsd.go

@@ -273,5 +273,6 @@ func (s *vfsShm) shmUnmap(delete bool) {
 
 func (s *vfsShm) shmBarrier() {
 	s.lockMtx.Lock()
+	//lint:ignore SA2001 memory barrier.
 	s.lockMtx.Unlock()
 }

vfs/tests/speedtest1/speedtest1_test.go

@@ -5,6 +5,7 @@ import (
 	"compress/bzip2"
 	"context"
 	"crypto/rand"
+	_ "embed"
 	"flag"
 	"io"
 	"os"
@@ -14,8 +15,6 @@ import (
 	"strings"
 	"testing"
 
-	_ "embed"
-
 	"github.com/tetratelabs/wazero"
 	"github.com/tetratelabs/wazero/api"
 	"github.com/tetratelabs/wazero/experimental"

vfs/vfs.go

@@ -11,6 +11,7 @@ import (
 	"github.com/tetratelabs/wazero/api"
 
 	"github.com/ncruces/go-sqlite3/internal/util"
+	"github.com/ncruces/go-sqlite3/util/sql3util"
 	"github.com/ncruces/julianday"
 )
 
@@ -146,7 +147,7 @@ func vfsOpen(ctx context.Context, mod api.Module, pVfs, zPath, pFile uint32, fla
 	}
 
 	if file, ok := file.(FilePowersafeOverwrite); ok {
-		if b, ok := util.ParseBool(name.URIParameter("psow")); ok {
+		if b, ok := sql3util.ParseBool(name.URIParameter("psow")); ok {
 			file.SetPowersafeOverwrite(b)
 		}
 	}