103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
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package stdlib
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import (
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"math/rand"
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"github.com/d5/tengo/objects"
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)
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var randModule = map[string]objects.Object{
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"int": &objects.UserFunction{Name: "int", Value: FuncARI64(rand.Int63)},
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"float": &objects.UserFunction{Name: "float", Value: FuncARF(rand.Float64)},
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"intn": &objects.UserFunction{Name: "intn", Value: FuncAI64RI64(rand.Int63n)},
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"exp_float": &objects.UserFunction{Name: "exp_float", Value: FuncARF(rand.ExpFloat64)},
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"norm_float": &objects.UserFunction{Name: "norm_float", Value: FuncARF(rand.NormFloat64)},
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"perm": &objects.UserFunction{Name: "perm", Value: FuncAIRIs(rand.Perm)},
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"seed": &objects.UserFunction{Name: "seed", Value: FuncAI64R(rand.Seed)},
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"read": &objects.UserFunction{
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Name: "read",
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Value: func(args ...objects.Object) (ret objects.Object, err error) {
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if len(args) != 1 {
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return nil, objects.ErrWrongNumArguments
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}
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y1, ok := args[0].(*objects.Bytes)
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if !ok {
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return nil, objects.ErrInvalidArgumentType{
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Name: "first",
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Expected: "bytes",
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Found: args[0].TypeName(),
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}
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}
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res, err := rand.Read(y1.Value)
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if err != nil {
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ret = wrapError(err)
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return
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}
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return &objects.Int{Value: int64(res)}, nil
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},
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},
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"rand": &objects.UserFunction{
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Name: "rand",
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Value: func(args ...objects.Object) (ret objects.Object, err error) {
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if len(args) != 1 {
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return nil, objects.ErrWrongNumArguments
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}
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i1, ok := objects.ToInt64(args[0])
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if !ok {
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return nil, objects.ErrInvalidArgumentType{
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Name: "first",
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Expected: "int(compatible)",
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Found: args[0].TypeName(),
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}
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}
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src := rand.NewSource(i1)
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return randRand(rand.New(src)), nil
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},
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},
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}
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func randRand(r *rand.Rand) *objects.ImmutableMap {
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return &objects.ImmutableMap{
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Value: map[string]objects.Object{
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"int": &objects.UserFunction{Name: "int", Value: FuncARI64(r.Int63)},
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"float": &objects.UserFunction{Name: "float", Value: FuncARF(r.Float64)},
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"intn": &objects.UserFunction{Name: "intn", Value: FuncAI64RI64(r.Int63n)},
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"exp_float": &objects.UserFunction{Name: "exp_float", Value: FuncARF(r.ExpFloat64)},
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"norm_float": &objects.UserFunction{Name: "norm_float", Value: FuncARF(r.NormFloat64)},
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"perm": &objects.UserFunction{Name: "perm", Value: FuncAIRIs(r.Perm)},
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"seed": &objects.UserFunction{Name: "seed", Value: FuncAI64R(r.Seed)},
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"read": &objects.UserFunction{
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Name: "read",
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Value: func(args ...objects.Object) (ret objects.Object, err error) {
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if len(args) != 1 {
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return nil, objects.ErrWrongNumArguments
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}
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y1, ok := args[0].(*objects.Bytes)
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if !ok {
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return nil, objects.ErrInvalidArgumentType{
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Name: "first",
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Expected: "bytes",
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Found: args[0].TypeName(),
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}
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}
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res, err := r.Read(y1.Value)
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if err != nil {
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ret = wrapError(err)
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return
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}
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return &objects.Int{Value: int64(res)}, nil
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},
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},
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},
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}
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}
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