Golang bindings initial working version(#534)

* WIP

* Fix includes

* Try to fix linking issues

* Refinements

* allow to load MPT and llama models too

* cleanup, add example, add README

gpt4all-bindings/golang/options.go

@@ -0,0 +1,127 @@
+package gpt4all
+
+type PredictOptions struct {
+	ContextSize, RepeatLastN, Tokens, TopK, Batch  int
+	TopP, Temperature, ContextErase, RepeatPenalty float64
+}
+
+type PredictOption func(p *PredictOptions)
+
+var DefaultOptions PredictOptions = PredictOptions{
+	Tokens:        200,
+	TopK:          10,
+	TopP:          0.90,
+	Temperature:   0.96,
+	Batch:         1,
+	ContextErase:  0.55,
+	ContextSize:   1024,
+	RepeatLastN:   10,
+	RepeatPenalty: 1.2,
+}
+
+var DefaultModelOptions ModelOptions = ModelOptions{
+	Threads:   4,
+	ModelType: GPTJType,
+}
+
+type ModelOptions struct {
+	Threads   int
+	ModelType ModelType
+}
+type ModelOption func(p *ModelOptions)
+
+type ModelType int
+
+const (
+	LLaMAType ModelType = 0
+	GPTJType  ModelType = iota
+	MPTType   ModelType = iota
+)
+
+// SetTokens sets the number of tokens to generate.
+func SetTokens(tokens int) PredictOption {
+	return func(p *PredictOptions) {
+		p.Tokens = tokens
+	}
+}
+
+// SetTopK sets the value for top-K sampling.
+func SetTopK(topk int) PredictOption {
+	return func(p *PredictOptions) {
+		p.TopK = topk
+	}
+}
+
+// SetTopP sets the value for nucleus sampling.
+func SetTopP(topp float64) PredictOption {
+	return func(p *PredictOptions) {
+		p.TopP = topp
+	}
+}
+
+// SetRepeatPenalty sets the repeat penalty.
+func SetRepeatPenalty(ce float64) PredictOption {
+	return func(p *PredictOptions) {
+		p.RepeatPenalty = ce
+	}
+}
+
+// SetRepeatLastN sets the RepeatLastN.
+func SetRepeatLastN(ce int) PredictOption {
+	return func(p *PredictOptions) {
+		p.RepeatLastN = ce
+	}
+}
+
+// SetContextErase sets the context erase %.
+func SetContextErase(ce float64) PredictOption {
+	return func(p *PredictOptions) {
+		p.ContextErase = ce
+	}
+}
+
+// SetTemperature sets the temperature value for text generation.
+func SetTemperature(temp float64) PredictOption {
+	return func(p *PredictOptions) {
+		p.Temperature = temp
+	}
+}
+
+// SetBatch sets the batch size.
+func SetBatch(size int) PredictOption {
+	return func(p *PredictOptions) {
+		p.Batch = size
+	}
+}
+
+// Create a new PredictOptions object with the given options.
+func NewPredictOptions(opts ...PredictOption) PredictOptions {
+	p := DefaultOptions
+	for _, opt := range opts {
+		opt(&p)
+	}
+	return p
+}
+
+// SetThreads sets the number of threads to use for text generation.
+func SetThreads(c int) ModelOption {
+	return func(p *ModelOptions) {
+		p.Threads = c
+	}
+}
+
+// SetModelType sets the model type.
+func SetModelType(c ModelType) ModelOption {
+	return func(p *ModelOptions) {
+		p.ModelType = c
+	}
+}
+
+// Create a new PredictOptions object with the given options.
+func NewModelOptions(opts ...ModelOption) ModelOptions {
+	p := DefaultModelOptions
+	for _, opt := range opts {
+		opt(&p)
+	}
+	return p
+}