serialbase.cpp

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//======================================================================
//======================================================================
 
#include "sdhlibrary_settings.h"
 
//----------------------------------------------------------------------
// System Includes - include with <>
//----------------------------------------------------------------------
 
#include <fcntl.h>
#include <stdio.h>
#if ! SDH_USE_VCC
# include <termios.h>
# include <unistd.h>
# include <sys/select.h>
# include <sys/ioctl.h>
#endif
#include <errno.h>
//#include <string.h>
 
#include <iostream>
#include <exception>
#include <stdarg.h>
#include <cstring>    // needed in gcc-4.3 for prototypes like strcmp according to http://gcc.gnu.org/gcc-4.3/porting_to.html
 
//----------------------------------------------------------------------
// Project Includes - include with ""
//----------------------------------------------------------------------
 
#include "serialbase.h"
#include "simpletime.h"
 
//----------------------------------------------------------------------
// Defines, enums, unions, structs,
//----------------------------------------------------------------------
 
 
//----------------------------------------------------------------------
// Global variables
//----------------------------------------------------------------------
 
 
//----------------------------------------------------------------------
// Function and class member implementation (function definitions)
//----------------------------------------------------------------------
 
using namespace std;
USING_NAMESPACE_SDH
 
char* cSerialBase::readline( char* line, int size, char const* eol, bool return_on_less_data )
{
    line[0] = '\0';
    int len = 0;
    int n;
    char c;
 
    if (ungetch_valid)
    {
        line[len++] = ungetch;
        ungetch_valid = false;
    }
 
    long timeout_us;
    if ( timeout >= 0.0 )
        timeout_us = (long) (timeout*1000000.0);
    else
        timeout_us = -1L;
    while (true)
    {
        //    n = ::read(fd, line + len, 1);
        n = Read( line + len, 1, timeout_us, return_on_less_data );
 
        if (n>0)
        {
            c = line[ len ];
            len += n;
 
            //cout << "read '" << c << "' from device\n"; cout.flush();
 
            if (strchr( eol, c ) != NULL)
                break;
 
 
            if (size > 0  &&  len >= size-1)
                break;
        }
        else
        {
            throw new cSerialBaseException( cMsg( "Timeout while reading line from device (timeout_us=%ld line=\"%s\")", timeout_us, line ) );
        }
    }
    // mark end of line
    line[ len ] = '\0';
 
    return line;
}
//----------------------------------------------------------------------
 
char const* cSerialBase::GetErrorMessage( tErrorCode dw )
{
    static char return_msg[512];
#if SDH_USE_VCC
    LPVOID lpMsgBuf;
 
    FormatMessageA( FORMAT_MESSAGE_ALLOCATE_BUFFER |
                    FORMAT_MESSAGE_FROM_SYSTEM |
                    FORMAT_MESSAGE_IGNORE_INSERTS,
                    NULL,
                    dw,
                    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                    (LPSTR) &lpMsgBuf,
                    0,
                    NULL );
 
    StringCchPrintfA( return_msg,
                      511,
                      "error 0x%x = %d = \"%s\"",
                      dw, dw, lpMsgBuf );
    LocalFree(lpMsgBuf);
#else
    snprintf( return_msg, 511, "error 0x%x = %d = \"%s\"", dw, dw, strerror( dw ) );
#endif
    return return_msg;
}
//----------------------------------------------------------------------
 
 
//======================================================================
/*
  Here are some settings for the emacs/xemacs editor (and can be safely ignored):
  (e.g. to explicitely set C++ mode for *.h header files)
 
  Local Variables:
  mode:C++
  mode:ELSE
  End:
*/
//======================================================================