vendor/github.com/mattn/go-sqlite3/convert.go - Code Metrics - Inspection of "Add golangci lint" - fraenky8/tables-to-go - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Pull Request — master (#36)

by Frank

created 2022-01-29 03:58 UTC

vendor/github.com/mattn/go-sqlite3/convert.go F

↳ Parent: Project

Size/Duplication

Total Lines	290
Duplicated Lines	0 %

Importance

Changes

Metric	Value
cc	80
eloc	220
dl	0
loc	290
rs	2
c	0
b	0
f	0

5 Methods

Rating	Name	Size	Complexity
B	sqlite3.asBytes	17	7
A	sqlite3.strconvErr	5	2
B	sqlite3.asString	21	8
F	sqlite3.convertAssign	215	61
A	sqlite3.cloneBytes	7	2

// Extracted from Go database/sql source code

// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Type conversions for Scan.

package sqlite3

import (
	"database/sql"
	"database/sql/driver"
	"errors"
	"fmt"
	"reflect"
	"strconv"
	"time"
)

var errNilPtr = errors.New("destination pointer is nil") // embedded in descriptive error

// convertAssign copies to dest the value in src, converting it if possible.
// An error is returned if the copy would result in loss of information.
// dest should be a pointer type.
func convertAssign(dest, src interface{}) error {
	// Common cases, without reflect.
	switch s := src.(type) {
	case string:
		switch d := dest.(type) {
		case *string:
			if d == nil {
				return errNilPtr
			}
			*d = s
			return nil
		case *[]byte:
			if d == nil {
				return errNilPtr
			}
			*d = []byte(s)
			return nil
		case *sql.RawBytes:
			if d == nil {
				return errNilPtr
			}
			*d = append((*d)[:0], s...)
			return nil
		}
	case []byte:
		switch d := dest.(type) {
		case *string:
			if d == nil {
				return errNilPtr
			}
			*d = string(s)
			return nil
		case *interface{}:
			if d == nil {
				return errNilPtr
			}
			*d = cloneBytes(s)
			return nil
		case *[]byte:
			if d == nil {
				return errNilPtr
			}
			*d = cloneBytes(s)
			return nil
		case *sql.RawBytes:
			if d == nil {
				return errNilPtr
			}
			*d = s
			return nil
		}
	case time.Time:
		switch d := dest.(type) {
		case *time.Time:
			*d = s
			return nil
		case *string:
			*d = s.Format(time.RFC3339Nano)
			return nil
		case *[]byte:
			if d == nil {
				return errNilPtr
			}
			*d = []byte(s.Format(time.RFC3339Nano))
			return nil
		case *sql.RawBytes:
			if d == nil {
				return errNilPtr
			}
			*d = s.AppendFormat((*d)[:0], time.RFC3339Nano)
			return nil
		}
	case nil:
		switch d := dest.(type) {
		case *interface{}:
			if d == nil {
				return errNilPtr
			}
			*d = nil
			return nil
		case *[]byte:
			if d == nil {
				return errNilPtr
			}
			*d = nil
			return nil
		case *sql.RawBytes:
			if d == nil {
				return errNilPtr
			}
			*d = nil
			return nil
		}
	}

	var sv reflect.Value

	switch d := dest.(type) {
	case *string:
		sv = reflect.ValueOf(src)
		switch sv.Kind() {
		case reflect.Bool,
			reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
			reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
			reflect.Float32, reflect.Float64:
			*d = asString(src)
			return nil
		}
	case *[]byte:
		sv = reflect.ValueOf(src)
		if b, ok := asBytes(nil, sv); ok {
			*d = b
			return nil
		}
	case *sql.RawBytes:
		sv = reflect.ValueOf(src)
		if b, ok := asBytes([]byte(*d)[:0], sv); ok {
			*d = sql.RawBytes(b)
			return nil
		}
	case *bool:
		bv, err := driver.Bool.ConvertValue(src)
		if err == nil {
			*d = bv.(bool)
		}
		return err
	case *interface{}:
		*d = src
		return nil
	}

	if scanner, ok := dest.(sql.Scanner); ok {
		return scanner.Scan(src)
	}

	dpv := reflect.ValueOf(dest)
	if dpv.Kind() != reflect.Ptr {
		return errors.New("destination not a pointer")
	}
	if dpv.IsNil() {
		return errNilPtr
	}

	if !sv.IsValid() {
		sv = reflect.ValueOf(src)
	}

	dv := reflect.Indirect(dpv)
	if sv.IsValid() && sv.Type().AssignableTo(dv.Type()) {
		switch b := src.(type) {
		case []byte:
			dv.Set(reflect.ValueOf(cloneBytes(b)))
		default:
			dv.Set(sv)
		}
		return nil
	}

	if dv.Kind() == sv.Kind() && sv.Type().ConvertibleTo(dv.Type()) {
		dv.Set(sv.Convert(dv.Type()))
		return nil
	}

	// The following conversions use a string value as an intermediate representation
	// to convert between various numeric types.
	//
	// This also allows scanning into user defined types such as "type Int int64".
	// For symmetry, also check for string destination types.
	switch dv.Kind() {
	case reflect.Ptr:
		if src == nil {
			dv.Set(reflect.Zero(dv.Type()))
			return nil
		}
		dv.Set(reflect.New(dv.Type().Elem()))
		return convertAssign(dv.Interface(), src)
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		s := asString(src)
		i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
		if err != nil {
			err = strconvErr(err)
			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
		}
		dv.SetInt(i64)
		return nil
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		s := asString(src)
		u64, err := strconv.ParseUint(s, 10, dv.Type().Bits())
		if err != nil {
			err = strconvErr(err)
			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
		}
		dv.SetUint(u64)
		return nil
	case reflect.Float32, reflect.Float64:
		s := asString(src)
		f64, err := strconv.ParseFloat(s, dv.Type().Bits())
		if err != nil {
			err = strconvErr(err)
			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
		}
		dv.SetFloat(f64)
		return nil
	case reflect.String:
		switch v := src.(type) {
		case string:
			dv.SetString(v)
			return nil
		case []byte:
			dv.SetString(string(v))
			return nil
		}
	}

	return fmt.Errorf("unsupported Scan, storing driver.Value type %T into type %T", src, dest)
}

func strconvErr(err error) error {
	if ne, ok := err.(*strconv.NumError); ok {
		return ne.Err
	}
	return err
}

func cloneBytes(b []byte) []byte {
	if b == nil {
		return nil
	}
	c := make([]byte, len(b))
	copy(c, b)
	return c
}

func asString(src interface{}) string {
	switch v := src.(type) {
	case string:
		return v
	case []byte:
		return string(v)
	}
	rv := reflect.ValueOf(src)
	switch rv.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.FormatInt(rv.Int(), 10)
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return strconv.FormatUint(rv.Uint(), 10)
	case reflect.Float64:
		return strconv.FormatFloat(rv.Float(), 'g', -1, 64)
	case reflect.Float32:
		return strconv.FormatFloat(rv.Float(), 'g', -1, 32)
	case reflect.Bool:
		return strconv.FormatBool(rv.Bool())
	}
	return fmt.Sprintf("%v", src)
}

func asBytes(buf []byte, rv reflect.Value) (b []byte, ok bool) {
	switch rv.Kind() {
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return strconv.AppendInt(buf, rv.Int(), 10), true
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return strconv.AppendUint(buf, rv.Uint(), 10), true
	case reflect.Float32:
		return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 32), true
	case reflect.Float64:
		return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 64), true
	case reflect.Bool:
		return strconv.AppendBool(buf, rv.Bool()), true
	case reflect.String:
		s := rv.String()
		return append(buf, s...), true
	}
	return
}


1			// Extracted from Go database/sql source code
2
3			// Copyright 2011 The Go Authors. All rights reserved.
4			// Use of this source code is governed by a BSD-style
5			// license that can be found in the LICENSE file.
6
7			// Type conversions for Scan.
8
9			package sqlite3
10
11			import (
12			"database/sql"
13			"database/sql/driver"
14			"errors"
15			"fmt"
16			"reflect"
17			"strconv"
18			"time"
19			)
20
21			var errNilPtr = errors.New("destination pointer is nil") // embedded in descriptive error
22
23			// convertAssign copies to dest the value in src, converting it if possible.
24			// An error is returned if the copy would result in loss of information.
25			// dest should be a pointer type.
26			func convertAssign(dest, src interface{}) error {
27			// Common cases, without reflect.
28			switch s := src.(type) {
29			case string:
30			switch d := dest.(type) {
31			case *string:
32			if d == nil {
33			return errNilPtr
34			}
35			*d = s
36			return nil
37			case *[]byte:
38			if d == nil {
39			return errNilPtr
40			}
41			*d = []byte(s)
42			return nil
43			case *sql.RawBytes:
44			if d == nil {
45			return errNilPtr
46			}
47			d = append((d)[:0], s...)
48			return nil
49			}
50			case []byte:
51			switch d := dest.(type) {
52			case *string:
53			if d == nil {
54			return errNilPtr
55			}
56			*d = string(s)
57			return nil
58			case *interface{}:
59			if d == nil {
60			return errNilPtr
61			}
62			*d = cloneBytes(s)
63			return nil
64			case *[]byte:
65			if d == nil {
66			return errNilPtr
67			}
68			*d = cloneBytes(s)
69			return nil
70			case *sql.RawBytes:
71			if d == nil {
72			return errNilPtr
73			}
74			*d = s
75			return nil
76			}
77			case time.Time:
78			switch d := dest.(type) {
79			case *time.Time:
80			*d = s
81			return nil
82			case *string:
83			*d = s.Format(time.RFC3339Nano)
84			return nil
85			case *[]byte:
86			if d == nil {
87			return errNilPtr
88			}
89			*d = []byte(s.Format(time.RFC3339Nano))
90			return nil
91			case *sql.RawBytes:
92			if d == nil {
93			return errNilPtr
94			}
95			d = s.AppendFormat((d)[:0], time.RFC3339Nano)
96			return nil
97			}
98			case nil:
99			switch d := dest.(type) {
100			case *interface{}:
101			if d == nil {
102			return errNilPtr
103			}
104			*d = nil
105			return nil
106			case *[]byte:
107			if d == nil {
108			return errNilPtr
109			}
110			*d = nil
111			return nil
112			case *sql.RawBytes:
113			if d == nil {
114			return errNilPtr
115			}
116			*d = nil
117			return nil
118			}
119			}
120
121			var sv reflect.Value
122
123			switch d := dest.(type) {
124			case *string:
125			sv = reflect.ValueOf(src)
126			switch sv.Kind() {
127			case reflect.Bool,
128			reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
129			reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
130			reflect.Float32, reflect.Float64:
131			*d = asString(src)
132			return nil
133			}
134			case *[]byte:
135			sv = reflect.ValueOf(src)
136			if b, ok := asBytes(nil, sv); ok {
137			*d = b
138			return nil
139			}
140			case *sql.RawBytes:
141			sv = reflect.ValueOf(src)
142			if b, ok := asBytes([]byte(*d)[:0], sv); ok {
143			*d = sql.RawBytes(b)
144			return nil
145			}
146			case *bool:
147			bv, err := driver.Bool.ConvertValue(src)
148			if err == nil {
149			*d = bv.(bool)
150			}
151			return err
152			case *interface{}:
153			*d = src
154			return nil
155			}
156
157			if scanner, ok := dest.(sql.Scanner); ok {
158			return scanner.Scan(src)
159			}
160
161			dpv := reflect.ValueOf(dest)
162			if dpv.Kind() != reflect.Ptr {
163			return errors.New("destination not a pointer")
164			}
165			if dpv.IsNil() {
166			return errNilPtr
167			}
168
169			if !sv.IsValid() {
170			sv = reflect.ValueOf(src)
171			}
172
173			dv := reflect.Indirect(dpv)
174			if sv.IsValid() && sv.Type().AssignableTo(dv.Type()) {
175			switch b := src.(type) {
176			case []byte:
177			dv.Set(reflect.ValueOf(cloneBytes(b)))
178			default:
179			dv.Set(sv)
180			}
181			return nil
182			}
183
184			if dv.Kind() == sv.Kind() && sv.Type().ConvertibleTo(dv.Type()) {
185			dv.Set(sv.Convert(dv.Type()))
186			return nil
187			}
188
189			// The following conversions use a string value as an intermediate representation
190			// to convert between various numeric types.
191			//
192			// This also allows scanning into user defined types such as "type Int int64".
193			// For symmetry, also check for string destination types.
194			switch dv.Kind() {
195			case reflect.Ptr:
196			if src == nil {
197			dv.Set(reflect.Zero(dv.Type()))
198			return nil
199			}
200			dv.Set(reflect.New(dv.Type().Elem()))
201			return convertAssign(dv.Interface(), src)
202			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
203			s := asString(src)
204			i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
205			if err != nil {
206			err = strconvErr(err)
207			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
208			}
209			dv.SetInt(i64)
210			return nil
211			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
212			s := asString(src)
213			u64, err := strconv.ParseUint(s, 10, dv.Type().Bits())
214			if err != nil {
215			err = strconvErr(err)
216			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
217			}
218			dv.SetUint(u64)
219			return nil
220			case reflect.Float32, reflect.Float64:
221			s := asString(src)
222			f64, err := strconv.ParseFloat(s, dv.Type().Bits())
223			if err != nil {
224			err = strconvErr(err)
225			return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
226			}
227			dv.SetFloat(f64)
228			return nil
229			case reflect.String:
230			switch v := src.(type) {
231			case string:
232			dv.SetString(v)
233			return nil
234			case []byte:
235			dv.SetString(string(v))
236			return nil
237			}
238			}
239
240			return fmt.Errorf("unsupported Scan, storing driver.Value type %T into type %T", src, dest)
241			}
242
243			func strconvErr(err error) error {
244			if ne, ok := err.(*strconv.NumError); ok {
245			return ne.Err
246			}
247			return err
248			}
249
250			func cloneBytes(b []byte) []byte {
251			if b == nil {
252			return nil
253			}
254			c := make([]byte, len(b))
255			copy(c, b)
256			return c
257			}
258
259			func asString(src interface{}) string {
260			switch v := src.(type) {
261			case string:
262			return v
263			case []byte:
264			return string(v)
265			}
266			rv := reflect.ValueOf(src)
267			switch rv.Kind() {
268			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
269			return strconv.FormatInt(rv.Int(), 10)
270			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
271			return strconv.FormatUint(rv.Uint(), 10)
272			case reflect.Float64:
273			return strconv.FormatFloat(rv.Float(), 'g', -1, 64)
274			case reflect.Float32:
275			return strconv.FormatFloat(rv.Float(), 'g', -1, 32)
276			case reflect.Bool:
277			return strconv.FormatBool(rv.Bool())
278			}
279			return fmt.Sprintf("%v", src)
280			}
281
282			func asBytes(buf []byte, rv reflect.Value) (b []byte, ok bool) {
283			switch rv.Kind() {
284			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
285			return strconv.AppendInt(buf, rv.Int(), 10), true
286			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
287			return strconv.AppendUint(buf, rv.Uint(), 10), true
288			case reflect.Float32:
289			return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 32), true
290			case reflect.Float64:
291			return strconv.AppendFloat(buf, rv.Float(), 'g', -1, 64), true
292			case reflect.Bool:
293			return strconv.AppendBool(buf, rv.Bool()), true
294			case reflect.String:
295			s := rv.String()
296			return append(buf, s...), true
297			}
298			return
299			}
300

fraenky8 / tables-to-go

Pull Request — master (#36)

vendor/github.com/mattn/go-sqlite3/convert.go F

Size/Duplication

Importance

5 Methods

Duplication Side-by-Side

Filter issues like