1 files changed, 102 insertions, 0 deletions
diff --git a/src/options/open_ostream.cpp b/src/options/open_ostream.cpp
new file mode 100644
index 000000000..4c92d056b
--- /dev/null
+++ b/src/options/open_ostream.cpp
@@ -0,0 +1,102 @@
+/*********************                                                        */
+/*! \file open_ostream.cpp
+ ** \verbatim
+ ** Original author: Tim King
+ ** Major contributors: none
+ ** Minor contributors (to current version): none
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2014  New York University and The University of Iowa
+ ** 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
+    throw(OptionException)
+{
+  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 */