lookup.c

#define BAD_ID -1

typedef struct { 
  char *key; 
  int val; 
} msp_commands_t;

static msp_commands_t lookupTable[] = {
    { "MSP_API_VERSION", MSP_API_VERSION }, { "MSP_FC_VARIANT", MSP_FC_VARIANT }, { "MSP_FC_VERSION", MSP_FC_VERSION }, { "MSP_BOARD_INFO", MSP_BOARD_INFO },
    { "MSP_BUILD_INFO", MSP_BUILD_INFO }, { "MSP_NAME", MSP_NAME }, { "MSP_SET_NAME", MSP_SET_NAME }, { "MSP_IDENT", MSP_IDENT }, { "MSP_STATUS", MSP_STATUS },
    { "MSP_RAW_IMU", MSP_RAW_IMU }, { "MSP_SERVO", MSP_SERVO }, { "MSP_MOTOR", MSP_MOTOR}, { "MSP_RC", MSP_RC }, { "MSP_ATTITUDE", MSP_ATTITUDE }, { "MSP_ALTITUDE", MSP_ALTITUDE },
    { "MSP_PID", MSP_PID }, { "MSP_BOX", MSP_BOX }, { "MSP_BOXNAMES", MSP_BOXNAMES }, { "MSP_PIDNAMES", MSP_PIDNAMES }, { "MSP_BOXIDS", MSP_BOXIDS },
    { "MSP_SET_RAW_RC", MSP_SET_RAW_RC }, { "MSP_SET_RAW_GPS", MSP_SET_RAW_GPS }, { "MSP_SET_PID", MSP_SET_PID }, { "MSP_SET_BOX", MSP_SET_BOX },
    { "MSP_SET_RC_TUNING", MSP_SET_RC_TUNING }, { "MSP_ACC_CALIBRATION", MSP_ACC_CALIBRATION }, { "MSP_MAG_CALIBRATION", MSP_MAG_CALIBRATION }, { "MSP_SET_MISC", MSP_SET_MISC },
    { "MSP_RESET_CONF", MSP_RESET_CONF }, { "MSP_SET_WP", MSP_SET_WP }, { "MSP_SELECT_SETTING", MSP_SELECT_SETTING }, { "MSP_SET_HEAD", MSP_SET_HEAD }
};

#define NKEYS (sizeof(lookupTable)/sizeof(msp_commands_t))

int idLookup(char *key) {
  for (int i = 0; i < NKEYS; i++) {
      msp_commands_t sym = lookupTable[i];

      if (!strcmp(sym.key, key))
          return sym.val;
  }

  return BAD_ID;
}