Move the llmodel C API to new top-level directory and version it.

gpt4all-backend/mpt.h

@@ -0,0 +1,36 @@
+#ifndef MPT_H
+#define MPT_H
+
+#include <string>
+#include <functional>
+#include <vector>
+#include "llmodel.h"
+
+class MPTPrivate;
+class MPT : public LLModel {
+public:
+    MPT();
+    ~MPT();
+
+    bool loadModel(const std::string &modelPath) override;
+    bool isModelLoaded() const override;
+    size_t stateSize() const override;
+    size_t saveState(uint8_t *dest) const override;
+    size_t restoreState(const uint8_t *src) override;
+    void prompt(const std::string &prompt,
+        std::function<bool(int32_t)> promptCallback,
+        std::function<bool(int32_t, const std::string&)> responseCallback,
+        std::function<bool(bool)> recalculateCallback,
+        PromptContext &ctx) override;
+    void setThreadCount(int32_t n_threads) override;
+    int32_t threadCount() override;
+
+protected:
+    void recalculateContext(PromptContext &promptCtx,
+        std::function<bool(bool)> recalculate) override;
+
+private:
+    MPTPrivate *d_ptr;
+};
+
+#endif // MPT_H