kea/src/lib/eval/eval_context.cc

// Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

#include <eval/eval_context.h>
#include <eval/parser.h>
#include <exceptions/exceptions.h>
#include <fstream>

EvalContext::EvalContext()
  : trace_scanning_(false), trace_parsing_(false)
{
}

EvalContext::~EvalContext()
{
}

int
EvalContext::parseFile(const std::string &filename)
{
    file = filename;
    scanBegin();
    isc::eval::EvalParser parser(*this);
    parser.set_debug_level(trace_parsing_);
    int res = parser.parse();
    scanEnd();
    return res;
}

int
EvalContext::parseString(const std::string& str)
{
    /// @todo: Is there any way for the parser to read from a stream,
    /// rather than a file? It would be better to use stringstream,
    /// but it seems that the lexer operates on FILE* interface.

    // Put the content into a file and then open that file for reading.
    remove("/tmp/eval");
    std::fstream f("/tmp/eval", std::ios::out);

    if (!f.good()) {
        isc_throw(isc::Unexpected, "Can't write /tmp/eval file");
    }
    f << str;
    f.close();

    return (parseFile("/tmp/eval"));
}

void
EvalContext::error(const isc::eval::location& l, const std::string& m)
{
    isc_throw(EvalError, l << ": " << m);
}

void
EvalContext::error (const std::string& m)
{
    isc_throw(EvalError, m);
}