First build with JSON RPC parsing

No responses or real functionality implemented

src/lsp.h

@@ -0,0 +1,90 @@
+#ifndef _LSP_H_
+#define _LSP_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+/* Ref: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/ */
+
+typedef enum lsp_error_enum {
+    // Defined by JSON-RPC
+    LSP_ERR_ParseError = -32700,
+    LSP_ERR_InvalidRequest = -32600,
+    LSP_ERR_MethodNotFound = -32601,
+    LSP_ERR_InvalidParams = -32602,
+    LSP_ERR_InternalError = -32603,
+
+    /**
+     * This is the start range of JSON-RPC reserved error codes.
+     * It doesn't denote a real error code. No LSP error codes should
+     * be defined between the start and end range. For backwards
+     * compatibility the `ServerNotInitialized` and the `UnknownErrorCode`
+     * are left in the range.
+     *
+     * @since 3.16.0
+     */
+    LSP_ERR_jsonrpcReservedErrorRangeStart = -32099,
+    /**
+     * Error code indicating that a server received a notification or
+     * request before the server received the `initialize` request.
+     */
+    LSP_ERR_ServerNotInitialized = -32002,
+    LSP_ERR_UnknownErrorCode = -32001,
+
+    /**
+     * This is the end range of JSON-RPC reserved error codes.
+     * It doesn't denote a real error code.
+     *
+     * @since 3.16.0
+     */
+    LSP_ERR_jsonrpcReservedErrorRangeEnd = -32000,
+
+    /**
+     * This is the start range of LSP reserved error codes.
+     * It doesn't denote a real error code.
+     *
+     * @since 3.16.0
+     */
+    LSP_ERR_lspReservedErrorRangeStart = -32899,
+
+    /**
+     * A request failed but it was syntactically correct, e.g the
+     * method name was known and the parameters were valid. The error
+     * message should contain human readable information about why
+     * the request failed.
+     *
+     * @since 3.17.0
+     */
+    LSP_ERR_RequestFailed = -32803,
+
+    /**
+     * The server cancelled the request. This error code should
+     * only be used for requests that explicitly support being
+     * server cancellable.
+     *
+     * @since 3.17.0
+     */
+    LSP_ERR_ServerCancelled = -32802,
+
+    /**
+     * The server detected that the content of a document got
+     * modified outside normal conditions. A server should
+     * NOT send this error code if it detects a content change
+     * in its unprocessed messages. The result even computed
+     * on an older state might still be useful for the client.
+     *
+     * If a client decides that a result is not of any use anymore
+     * the client should cancel the request.
+     */
+    LSP_ERR_ContentModified = -32801,
+
+    /**
+     * The client has canceled a request and a server has detected
+     * the cancel.
+     */
+    LSP_ERR_RequestCancelled = -32800,
+} lsp_error_e;
+
+#endif /* _LSP_H_ */
+