github.com/99designs/gqlgen@v0.17.45/graphql/int.go (about)

     1  package graphql
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  	"io"
     7  	"strconv"
     8  )
     9  
    10  func MarshalInt(i int) Marshaler {
    11  	return WriterFunc(func(w io.Writer) {
    12  		io.WriteString(w, strconv.Itoa(i))
    13  	})
    14  }
    15  
    16  func UnmarshalInt(v interface{}) (int, error) {
    17  	switch v := v.(type) {
    18  	case string:
    19  		return strconv.Atoi(v)
    20  	case int:
    21  		return v, nil
    22  	case int64:
    23  		return int(v), nil
    24  	case json.Number:
    25  		return strconv.Atoi(string(v))
    26  	default:
    27  		return 0, fmt.Errorf("%T is not an int", v)
    28  	}
    29  }
    30  
    31  func MarshalInt64(i int64) Marshaler {
    32  	return WriterFunc(func(w io.Writer) {
    33  		io.WriteString(w, strconv.FormatInt(i, 10))
    34  	})
    35  }
    36  
    37  func UnmarshalInt64(v interface{}) (int64, error) {
    38  	switch v := v.(type) {
    39  	case string:
    40  		return strconv.ParseInt(v, 10, 64)
    41  	case int:
    42  		return int64(v), nil
    43  	case int64:
    44  		return v, nil
    45  	case json.Number:
    46  		return strconv.ParseInt(string(v), 10, 64)
    47  	default:
    48  		return 0, fmt.Errorf("%T is not an int", v)
    49  	}
    50  }
    51  
    52  func MarshalInt32(i int32) Marshaler {
    53  	return WriterFunc(func(w io.Writer) {
    54  		io.WriteString(w, strconv.FormatInt(int64(i), 10))
    55  	})
    56  }
    57  
    58  func UnmarshalInt32(v interface{}) (int32, error) {
    59  	switch v := v.(type) {
    60  	case string:
    61  		iv, err := strconv.ParseInt(v, 10, 32)
    62  		if err != nil {
    63  			return 0, err
    64  		}
    65  		return int32(iv), nil
    66  	case int:
    67  		return int32(v), nil
    68  	case int64:
    69  		return int32(v), nil
    70  	case json.Number:
    71  		iv, err := strconv.ParseInt(string(v), 10, 32)
    72  		if err != nil {
    73  			return 0, err
    74  		}
    75  		return int32(iv), nil
    76  	default:
    77  		return 0, fmt.Errorf("%T is not an int", v)
    78  	}
    79  }