open_source / socket-cpp

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src/exception.cpp 1.21 KB
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ea9eaf95   Peter M. Groen   Fixed Headers 
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  #include "socket-cpp/exception.h"
  #include "socket-cpp/platform.h"
48b4c725   Peter M. Groen   Setting up Socket-pp 
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  #include <cstring>
  
  // Used to explicitly ignore the returned value of a function call.
  #define ignore_result(x) if (x) {}
  
  using namespace std;
ea9eaf95   Peter M. Groen   Fixed Headers 
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  using namespace osdev::components::socket-cpp;
48b4c725   Peter M. Groen   Setting up Socket-pp 
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  sys_error::sys_error(int err) : runtime_error(error_str(err)), errno_(err)
  {
  }
  
  std::string sys_error::error_str(int err)
  {
  	char buf[1024];
  	buf[0] = '\x0';
  
  	#if defined(_WIN32)
  		FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
  			NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
  			buf, sizeof(buf), NULL);
      #else
      	#ifdef _GNU_SOURCE
  			#if !defined(__GLIBC__)
  			// use the XSI standard behavior.
  				int e = strerror_r(err, buf, sizeof(buf));
  				auto s = strerror(e);
  				return s ? std::string(s) : std::string();
  			#else
  			// assume GNU exception
  				auto s = strerror_r(err, buf, sizeof(buf));
  				return s ? std::string(s) : std::string();
  			#endif
          #else
              ignore_result(strerror_r(err, buf, sizeof(buf)));
          #endif
      #endif
  	return std::string(buf);
  }
  
  getaddrinfo_error::getaddrinfo_error(int err, const string& hostname)
      : runtime_error(gai_strerror(err)), error_(err), hostname_(hostname)
  {
  }