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/********************* */
/*! \file open_ostream.cpp
** \verbatim
** Top contributors (to current version):
** Morgan Deters, Tim King
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief [[ Add one-line brief description here ]]
**
** [[ Add lengthier description here ]]
** \todo document this file
**/
#include "options/open_ostream.h"
#include <cerrno>
#include <iostream>
#include <ostream>
#include <sstream>
#include <string>
#include <utility>
#include "lib/strtok_r.h"
#include "options/parser_options.h"
namespace CVC4 {
OstreamOpener::OstreamOpener(const char* channelName)
: d_channelName(channelName)
, d_specialCases()
{}
void OstreamOpener::addSpecialCase(const std::string& name, std::ostream* out){
d_specialCases[name] = out;
}
std::pair< bool, std::ostream* > OstreamOpener::open(const std::string& optarg) const
{
if(optarg == "") {
std::stringstream ss;
ss << "Bad file name setting for " << d_channelName;
throw OptionException(ss.str());
}
if(d_specialCases.find(optarg) != d_specialCases.end()){
return std::make_pair(false, (*d_specialCases.find(optarg)).second);
} else if(!options::filesystemAccess()) {
throw OptionException(std::string("Filesystem access not permitted"));
} else {
errno = 0;
std::ostream* outStream;
outStream = new std::ofstream(optarg.c_str(),
std::ofstream::out | std::ofstream::trunc);
if(outStream == NULL || !*outStream) {
std::stringstream ss;
ss << "Cannot open " << d_channelName << " file: `"
<< optarg << "': " << cvc4_errno_failreason();
throw OptionException(ss.str());
}
return make_pair(true, outStream);
}
}
std::string cvc4_errno_failreason() {
#if HAVE_STRERROR_R
#if STRERROR_R_CHAR_P
if(errno != 0) {
// GNU version of strerror_r: *might* use the given buffer,
// or might not. It returns a pointer to buf, or not.
char buf[80];
return std::string(strerror_r(errno, buf, sizeof buf));
} else {
return "unknown reason";
}
#else /* STRERROR_R_CHAR_P */
if(errno != 0) {
// XSI version of strerror_r: always uses the given buffer.
// Returns an error code.
char buf[80];
if(strerror_r(errno, buf, sizeof buf) == 0) {
return std::string(buf);
} else {
// some error occurred while getting the error string
return "unknown reason";
}
} else {
return "unknown reason";
}
#endif /* STRERROR_R_CHAR_P */
#else /* HAVE_STRERROR_R */
return "unknown reason";
#endif /* HAVE_STRERROR_R */
}
}/* CVC4 namespace */
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