feat: add ToBigInt

2026-02-04 12:52:28 +08:00 · 2024-12-02 11:25:16 +08:00
parent 8f3ea60636
commit 7fb49515ce
7 changed files with 217 additions and 61 deletions
--- a/convertor/convertor.go
+++ b/convertor/convertor.go
@@ -14,11 +14,13 @@ import (
 	"fmt"
 	"io"
 	"math"
+	"math/big"
 	"reflect"
 	"strconv"
 	"strings"

 	"github.com/duke-git/lancet/v2/structs"
+	"golang.org/x/exp/constraints"
 	"golang.org/x/text/encoding/simplifiedchinese"
 	"golang.org/x/text/transform"
 )
@@ -483,3 +485,36 @@ func ToRawUrlBase64(value any) string {
 		return base64.RawURLEncoding.EncodeToString(marshal)
 	}
 }
+
+// ToBigInt converts an integer of any supported type (int, int64, uint64, etc.) to *big.Int
+// Play: todo
+func ToBigInt[T constraints.Integer](v T) (*big.Int, error) {
+	result := new(big.Int)
+
+	switch v := any(v).(type) {
+	case int:
+		result.SetInt64(int64(v)) // Convert to int64 for big.Int
+	case int8:
+		result.SetInt64(int64(v))
+	case int16:
+		result.SetInt64(int64(v))
+	case int32:
+		result.SetInt64(int64(v))
+	case int64:
+		result.SetInt64(v)
+	case uint:
+		result.SetUint64(uint64(v)) // Convert to uint64 for big.Int
+	case uint8:
+		result.SetUint64(uint64(v))
+	case uint16:
+		result.SetUint64(uint64(v))
+	case uint32:
+		result.SetUint64(uint64(v))
+	case uint64:
+		result.SetUint64(v)
+	default:
+		return nil, fmt.Errorf("unsupported type: %T", v)
+	}
+
+	return result, nil
+}
--- a/convertor/convertor_example_test.go
+++ b/convertor/convertor_example_test.go
@@ -571,3 +571,12 @@ func ExampleToRawUrlBase64() {
 	// dHJ1ZQ
 	// ZXJy
 }
+
+func ExampleToBigInt() {
+	n := 9876543210
+	bigInt, _ := ToBigInt(n)
+
+	fmt.Println(bigInt)
+	// Output:
+	// 9876543210
+}
--- a/convertor/convertor_test.go
+++ b/convertor/convertor_test.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"math/big"
 	"reflect"
 	"strconv"
 	"testing"
@@ -741,3 +742,52 @@ func TestToRawUrlBase64(t *testing.T) {
 	d15, _ := base64.RawURLEncoding.DecodeString(r15)
 	assert.Equal("4+3/4?=", string(d15))
 }
+
+func TestToBigInt(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestToBigInt")
+
+	tests := []struct {
+		name  string
+		input int64
+		want  *big.Int
+	}{
+		{
+			name:  "int",
+			input: 42,
+			want:  big.NewInt(42),
+		},
+		{
+			name:  "int8",
+			input: int64(int8(127)),
+			want:  big.NewInt(127),
+		},
+		{
+			name:  "int16",
+			input: int64(int16(32000)),
+			want:  big.NewInt(32000),
+		},
+		{
+			name:  "int32",
+			input: int64(int32(123456)),
+			want:  big.NewInt(123456),
+		},
+		{
+			name:  "int64",
+			input: int64(987654321),
+			want:  big.NewInt(987654321),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := ToBigInt(tt.input)
+			if err != nil {
+				t.Errorf("ToBigInt() error = %v", err)
+				return
+			}
+
+			assert.Equal(tt.want, got)
+		})
+	}
+}
--- a/cryptor/rsa_private_example.pem
+++ b/cryptor/rsa_private_example.pem
@@ -1,51 +1,51 @@
 -----BEGIN rsa private key-----
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 -----END rsa private key-----
--- a/cryptor/rsa_public_example.pem
+++ b/cryptor/rsa_public_example.pem
@@ -1,14 +1,14 @@
 -----BEGIN rsa public key-----
-MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxZGG6vSSETKwW7bxx7NA
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 -----END rsa public key-----
--- a/docs/api/packages/convertor.md
+++ b/docs/api/packages/convertor.md
@@ -47,6 +47,7 @@ import (
 -   [ToUrlBase64](#ToUrlBase64)
 -   [ToRawStdBase64](#ToRawStdBase64)
 -   [ToRawUrlBase64](#ToRawUrlBase64)
+-   [ToBigInt](#ToBigInt)

 <div STYLE="page-break-after: always;"></div>

@@ -1148,4 +1149,34 @@ func main() {
    // dHJ1ZQ
    // ZXJy
 }
+```
+
+### <span id="ToBigInt">ToBigInt</span>
+
+<p>值转换为bigInt。</p>
+
+<b>函数签名:<span style="float:right;display:inline-block;">[运行](todo)</span></b>
+
+```go
+func ToBigInt[T constraints.Integer](v T) (*big.Int, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    n := 9876543210
+    bigInt, _ := convertor.ToBigInt(n)
+
+    fmt.Println(bigInt)
+    // Output:
+    // 9876543210
+}
 ```
--- a/docs/en/api/packages/convertor.md
+++ b/docs/en/api/packages/convertor.md
@@ -47,6 +47,7 @@ import (
 -   [ToUrlBase64](#ToUrlBase64)
 -   [ToRawStdBase64](#ToRawStdBase64)
 -   [ToRawUrlBase64](#ToRawUrlBase64)
+-   [ToBigInt](#ToBigInt)

 <div STYLE="page-break-after: always;"></div>

@@ -1116,4 +1117,34 @@ func main() {
    // map[a:1 b:2] false
    // &{test 1 0.1 true <nil> } false
 }
+```
+
+### <span id="ToBigInt">ToBigInt</span>
+
+<p>Converts an integer of any supported type (int, int64, uint64, etc.) to *big.Int</p>
+
+<b>Signature:<span style="float:right;display:inline-block;">[Run](todo)</span></b>
+
+```go
+func ToBigInt[T constraints.Integer](v T) (*big.Int, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/convertor"
+)
+
+func main() {
+    n := 9876543210
+    bigInt, _ := convertor.ToBigInt(n)
+
+    fmt.Println(bigInt)
+    // Output:
+    // 9876543210
+}
 ```