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wt5001: throw exception(s) on fatal errors

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Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit is contained in:
Jon Trulson 2015-09-11 12:40:59 -06:00 committed by Mihai Tudor Panu
parent 1fefdcbdf1
commit 64777bd0ef
1 changed files with 30 additions and 9 deletions
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39
src/wt5001/wt5001.cxx
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@ -23,6 +23,9 @@
*/
#include <iostream>
#include <sstream>
#include <string>
#include <stdexcept>
#include "wt5001.h"
@ -37,7 +40,8 @@ WT5001::WT5001(int uart)
if ( !(m_uart = mraa_uart_init(uart)) )
{
cerr << __FUNCTION__ << ": mraa_uart_init() failed" << endl;
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_uart_init() failed");
return;
}
@ -46,15 +50,18 @@ WT5001::WT5001(int uart)
if (!devPath)
{
cerr << __FUNCTION__ << ": mraa_uart_get_dev_path() failed" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": mraa_uart_get_dev_path() failed");
return;
}
// now open the tty
if ( (m_ttyFd = open(devPath, O_RDWR)) == -1)
{
cerr << __FUNCTION__ << ": open of " << devPath << " failed: "
<< strerror(errno) << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": open of " +
string(devPath) + " failed: " +
string(strerror(errno)));
return;
}
}
@ -102,7 +109,12 @@ int WT5001::readData(char *buffer, int len)
int rv = read(m_ttyFd, buffer, len);
if (rv < 0)
cerr << __FUNCTION__ << ": read failed: " << strerror(errno) << endl;
{
throw std::runtime_error(std::string(__FUNCTION__) +
": read() failed: " +
string(strerror(errno)));
return rv;
}
return rv;
}
@ -119,7 +131,9 @@ int WT5001::writeData(char *buffer, int len)
if (rv < 0)
{
cerr << __FUNCTION__ << ": write failed: " << strerror(errno) << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": write() failed: " +
string(strerror(errno)));
return rv;
}
@ -149,7 +163,9 @@ bool WT5001::setupTty(speed_t baud)
// make it so
if (tcsetattr(m_ttyFd, TCSAFLUSH, &termio) < 0)
{
cerr << __FUNCTION__ << ": tcsetattr failed: " << strerror(errno) << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": tcsetattr() failed: " +
string(strerror(errno)));
return false;
}
@ -267,8 +283,13 @@ bool WT5001::setVolume(uint8_t vol)
{
if (vol > WT5001_MAX_VOLUME)
{
cerr << __FUNCTION__ << ": volume must be between 0 and "
<< WT5001_MAX_VOLUME << endl;
// C++11 std::to_string() would be nice, but...
std::ostringstream str;
str << WT5001_MAX_VOLUME;
throw std::out_of_range(std::string(__FUNCTION__) +
": angle must be between 0 and " +
str.str());
return false;
}