allwpilib/src/ntcore.cpp

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2015. All Rights Reserved.                             */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project.                                                               */
/*----------------------------------------------------------------------------*/

#include "ntcore.h"

#include <cassert>
#include <cstdlib>
#include <fstream>

#include "Storage.h"

using namespace ntimpl;

/*
 * Table Functions
 */

void NT_GetEntryValue(const char *name, unsigned int name_len,
                      struct NT_Value *value) {}

int NT_SetEntryValue(const char *name, unsigned int name_len,
                     const struct NT_Value *value) {
  return 0;
}

void NT_SetEntryTypeValue(const char *name, unsigned int name_len,
                          const struct NT_Value *value) {}

void NT_SetEntryFlags(const char *name, size_t name_len, unsigned int flags) {}

unsigned int NT_GetEntryFlags(const char *name, size_t name_len) {
  return 0;
}

void NT_DeleteEntry(const char *name, unsigned int name_len) {}

void NT_DeleteAllEntries(void) {}

struct NT_EntryInfo *NT_GetEntryInfo(const char *prefix,
                                     unsigned int prefix_len, int types,
                                     unsigned int *count) {
  return nullptr;
}

void NT_Flush(void) {}

/*
 * Callback Creation Functions
 */

unsigned int NT_AddEntryListener(const char *prefix, size_t prefix_len,
                                 void *data,
                                 NT_EntryListenerCallback callback) {
  return 0;
}
void NT_RemoveEntryListener(unsigned int entry_listener_uid) {}
unsigned int NT_AddConnectionListener(void *data,
                                      NT_ConnectionListenerCallback callback) {
  return 0;
}
void NT_RemoveConnectionListener(unsigned int conn_listener_uid) {}

/*
 * Remote Procedure Call Functions
 */

unsigned int NT_CreateRpc(const char *name, size_t name_len,
                          const NT_RpcDefinition *def, void *data,
                          NT_RpcCallback callback);
void NT_DeleteRpc(unsigned int rpc_uid);
unsigned int NT_CallRpc(const char *name, size_t name_len,
                        const NT_Value *params, size_t params_len);
NT_Value *NT_GetRpcResult(unsigned int result_uid, size_t *results_len);

/*
 * Client/Server Functions
 */

void NT_SetNetworkIdentity(const char *name, size_t name_len) {}
void NT_StartServer(const char *persist_filename, const char *listen_address,
                    unsigned int port) {}
void NT_StopServer(void) {}
void NT_StartClient(const char *server_name, unsigned int port) {}
void NT_StopClient(void) {}
void NT_SetUpdateRate(double interval) {}
struct NT_ConnectionInfo *NT_GetConnections(size_t *count) {
  return nullptr;
}

/*
 * Persistent Functions
 */

const char *NT_SavePersistent(const char *filename) {
  const Storage& storage = Storage::GetInstance();
  std::ofstream os(filename);
  if (!os) return "could not open file";
  storage.SavePersistent(os);
  return nullptr;
}

const char *NT_LoadPersistent(const char *filename,
                              void (*warn)(size_t line, const char *msg)) {
  Storage& storage = Storage::GetInstance();
  std::ifstream is(filename);
  if (!is) return "could not open file";
  if (!storage.LoadPersistent(is, warn)) return "error reading file";
  return nullptr;
}

/*
 * Utility Functions
 */

void NT_DisposeValue(NT_Value *value) {
  switch (value->type) {
    case NT_UNASSIGNED:
    case NT_BOOLEAN:
    case NT_DOUBLE:
      break;
    case NT_STRING:
    case NT_RAW:
    case NT_RPC:
      std::free(value->data.v_string.str);
      break;
    case NT_BOOLEAN_ARRAY:
      std::free(value->data.arr_boolean.arr);
      break;
    case NT_DOUBLE_ARRAY:
      std::free(value->data.arr_double.arr);
      break;
    case NT_STRING_ARRAY: {
      for (size_t i = 0; i < value->data.arr_string.size; i++)
        std::free(value->data.arr_string.arr[i].str);
      std::free(value->data.arr_string.arr);
      break;
    }
    default:
      assert(0 && "unknown value type");
  }
  value->type = NT_UNASSIGNED;
  value->last_change = 0;
}

void NT_InitValue(NT_Value *value) {
  value->type = NT_UNASSIGNED;
  value->last_change = 0;
}

void NT_DisposeString(NT_String *str) {
  std::free(str->str);
  str->str = nullptr;
  str->len = 0;
}

void NT_InitString(NT_String *str) {
  str->str = nullptr;
  str->len = 0;
}

void NT_DisposeConnectionInfoArray(NT_ConnectionInfo *arr, size_t count) {
  unsigned int i;
  for (i = 0; i < count; i++)
    std::free(arr[i].remote_id.str);
  std::free(arr);
}