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grovescam: 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 2015-09-10 11:26:07 -06:00 committed by Mihai Tudor Panu
parent 5ab01e5a65
commit f567f282ae
1 changed files with 39 additions and 33 deletions
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72
src/grovescam/grovescam.cxx
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@ -25,6 +25,8 @@
*/
#include <iostream>
#include <string>
#include <stdexcept>
#include <errno.h>
#include "grovescam.h"
@ -45,7 +47,8 @@ GROVESCAM::GROVESCAM(int uart, uint8_t camAddr)
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;
}
@ -54,15 +57,18 @@ GROVESCAM::GROVESCAM(int uart, uint8_t camAddr)
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;
}
}
@ -131,7 +137,9 @@ int GROVESCAM::writeData(uint8_t *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;
}
@ -161,7 +169,9 @@ bool GROVESCAM::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;
}
@ -187,7 +197,8 @@ bool GROVESCAM::init()
{
if (retries++ > maxRetries)
{
cerr << __FUNCTION__ << ": retries exceeded" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": maximum retries exceeded");
return false;
}
@ -238,7 +249,8 @@ bool GROVESCAM::preCapture(PIC_FORMATS_T fmt)
{
if (retries++ > maxRetries)
{
cerr << __FUNCTION__ << ": retries exceeded" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": maximum retries exceeded");
return false;
}
@ -276,7 +288,8 @@ bool GROVESCAM::doCapture()
{
if (retries++ > maxRetries)
{
cerr << __FUNCTION__ << ": retries exceeded" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": maximum retries exceeded");
return false;
}
@ -309,7 +322,8 @@ bool GROVESCAM::doCapture()
{
if (retries++ > maxRetries)
{
cerr << __FUNCTION__ << ": retries exceeded" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": maximum retries exceeded");
return false;
}
@ -334,7 +348,8 @@ bool GROVESCAM::doCapture()
{
if (retries++ > maxRetries)
{
cerr << __FUNCTION__ << ": retries exceeded" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": maximum retries exceeded");
return false;
}
@ -373,15 +388,15 @@ bool GROVESCAM::storeImage(const char *fname)
{
if (!fname)
{
cerr << __FUNCTION__ << "@" << __LINE__
<< ": fname is NULL" << endl;
throw std::invalid_argument(std::string(__FUNCTION__) +
": filename is NULL");
return false;
}
if (!m_picTotalLen)
{
cerr << __FUNCTION__ << "@" << __LINE__
<< ": Picture length is zero, you need to capture first." << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": Picture length is zero, you need to capture first.");
return false;
}
@ -390,9 +405,9 @@ bool GROVESCAM::storeImage(const char *fname)
if (!file)
{
cerr << __FUNCTION__ << "@" << __LINE__
<< ": fopen failed: " << strerror(errno) << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": fopen() failed: " +
string(strerror(errno)));
return false;
}
@ -405,7 +420,6 @@ bool GROVESCAM::storeImage(const char *fname)
uint8_t cmd[pktLen] = { 0xaa, 0x0e | m_camAddr, 0x00, 0x00, 0x00, 0x00 };
uint8_t pkt[MAX_PKT_LEN];
int retries = 0;
bool failed = false;
for (unsigned int i = 0; i < pktCnt; i++)
{
@ -425,10 +439,9 @@ bool GROVESCAM::storeImage(const char *fname)
{
if (retries++ > maxRetries)
{
cerr << __FUNCTION__ << ": timeout, max retries exhausted."
<< endl;
failed = true;
break;
throw std::runtime_error(std::string(__FUNCTION__) +
": timeout, maximum retries exceeded");
return false;
}
goto retry;
}
@ -446,10 +459,9 @@ bool GROVESCAM::storeImage(const char *fname)
goto retry;
else
{
cerr << __FUNCTION__ << ": cksum error, max retries exhausted."
<< endl;
failed = true;
break;
throw std::runtime_error(std::string(__FUNCTION__) +
": cksum error, maximum retries exceeded");
return false;
}
}
@ -465,11 +477,5 @@ bool GROVESCAM::storeImage(const char *fname)
// reset the pic length to 0 for another run.
m_picTotalLen = 0;
if (failed)
{
cerr << "Failed to download and store image." << endl;
return false;
}
return true;
}