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// Copyright (C) 2018-2021 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <netconf/parser_context.h>
#include <netconf/netconf_parser.h>
#include <netconf/netconf_log.h>
#include <exceptions/exceptions.h>
//#include <cc/dhcp_config_error.h>
#include <cc/data.h>
#include <fstream>
#include <sstream>
#include <limits>
namespace isc {
namespace netconf {
ParserContext::ParserContext()
: sfile_(0), ctx_(NO_KEYWORDS), trace_scanning_(false), trace_parsing_(false)
{
}
ParserContext::~ParserContext()
{
}
isc::data::ElementPtr
ParserContext::parseString(const std::string& str, ParserType parser_type)
{
scanStringBegin(str, parser_type);
return (parseCommon());
}
isc::data::ElementPtr
ParserContext::parseFile(const std::string& filename, ParserType parser_type) {
FILE* f = fopen(filename.c_str(), "r");
if (!f) {
isc_throw(ParseError, "Unable to open file " << filename);
}
scanFileBegin(f, filename, parser_type);
return (parseCommon());
}
isc::data::ElementPtr
ParserContext::parseCommon() {
isc::netconf::NetconfParser parser(*this);
// Uncomment this to get detailed parser logs.
// trace_parsing_ = true;
parser.set_debug_level(trace_parsing_);
try {
int res = parser.parse();
if (res != 0) {
isc_throw(ParseError, "Parser abort");
}
scanEnd();
}
catch (...) {
scanEnd();
throw;
}
if (stack_.size() == 1) {
return (stack_[0]);
} else {
isc_throw(ParseError, "Expected exactly one terminal Element expected, found "
<< stack_.size());
}
}
void
ParserContext::error(const isc::netconf::location& loc,
const std::string& what,
size_t pos)
{
if (pos == 0) {
isc_throw(ParseError, loc << ": " << what);
} else {
isc_throw(ParseError, loc << " (near " << pos << "): " << what);
}
}
void
ParserContext::error(const std::string& what)
{
isc_throw(ParseError, what);
}
void
ParserContext::fatal(const std::string& what)
{
isc_throw(ParseError, what);
}
isc::data::Element::Position
ParserContext::loc2pos(isc::netconf::location& loc)
{
const std::string& file = *loc.begin.filename;
const uint32_t line = loc.begin.line;
const uint32_t pos = loc.begin.column;
return (isc::data::Element::Position(file, line, pos));
}
void
ParserContext::require(const std::string& name,
isc::data::Element::Position open_loc,
isc::data::Element::Position close_loc)
{
ConstElementPtr value = stack_.back()->get(name);
if (!value) {
isc_throw(ParseError,
"missing parameter '" << name << "' ("
<< stack_.back()->getPosition() << ") ["
<< contextName() << " map between "
<< open_loc << " and " << close_loc << "]");
}
}
void
ParserContext::unique(const std::string& name,
isc::data::Element::Position loc)
{
ConstElementPtr value = stack_.back()->get(name);
if (value) {
if (ctx_ != NO_KEYWORDS) {
isc_throw(ParseError, loc << ": duplicate " << name
<< " entries in " << contextName()
<< " map (previous at " << value->getPosition() << ")");
} else {
isc_throw(ParseError, loc << ": duplicate " << name
<< " entries in JSON"
<< " map (previous at " << value->getPosition() << ")");
}
}
}
void
ParserContext::enter(const LexerContext& ctx)
{
cstack_.push_back(ctx_);
ctx_ = ctx;
}
void
ParserContext::leave()
{
if (cstack_.empty()) {
fatal("unbalanced syntactic context");
}
ctx_ = cstack_.back();
cstack_.pop_back();
}
const std::string
ParserContext::contextName()
{
switch (ctx_) {
case NO_KEYWORDS:
return ("__no keywords__");
case CONFIG:
return ("toplevel");
case NETCONF:
return ("Netconf");
case MANAGED_SERVERS:
return ("managed-servers");
case SERVER:
return ("managed-servers entry");
case CONTROL_SOCKET:
return ("control-socket");
case SOCKET_TYPE:
return ("socket-type");
case HOOKS_LIBRARIES:
return ("hooks-libraries");
case LOGGERS:
return ("loggers");
case OUTPUT_OPTIONS:
return ("output-options");
default:
return ("__unknown__");
}
}
void
ParserContext::warning(const isc::netconf::location& loc,
const std::string& what) {
std::ostringstream msg;
msg << loc << ": " << what;
LOG_WARN(netconf_logger, NETCONF_CONFIG_SYNTAX_WARNING)
.arg(msg.str());
}
void
ParserContext::warnAboutExtraCommas(const isc::netconf::location& loc) {
warning(loc, "Extraneous comma. A piece of configuration may have been omitted.");
}
} // namespace netconf
} // namespace isc
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