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/*
* Copyright (c) 2003-2023, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @addtogroup data
*/
/**
* @file context.h
* @author John Wiegley
*
* @ingroup data
*/
#pragma once
#include "utils.h"
#include "times.h"
#if HAVE_GPGME
#include "gpgme.h"
#endif
namespace ledger {
class journal_t;
class account_t;
class scope_t;
class parse_context_t
{
public:
static const std::size_t MAX_LINE = 4096;
shared_ptr<std::istream> stream;
path pathname;
path current_directory;
journal_t * journal;
account_t * master;
scope_t * scope;
char linebuf[MAX_LINE + 1];
std::istream::pos_type line_beg_pos;
std::istream::pos_type curr_pos;
std::size_t linenum;
std::size_t errors;
std::size_t count;
std::size_t sequence;
std::string last;
explicit parse_context_t(const path& cwd)
: current_directory(cwd), master(NULL), scope(NULL),
linenum(0), errors(0), count(0), sequence(1) {}
explicit parse_context_t(shared_ptr<std::istream> _stream,
const path& cwd)
: stream(_stream), current_directory(cwd), master(NULL),
scope(NULL), linenum(0), errors(0), count(0), sequence(1) {}
parse_context_t(const parse_context_t& context)
: stream(context.stream),
pathname(context.pathname),
current_directory(context.current_directory),
journal(context.journal),
master(context.master),
scope(context.scope),
line_beg_pos(context.line_beg_pos),
curr_pos(context.curr_pos),
linenum(context.linenum),
errors(context.errors),
count(context.count),
sequence(context.sequence) {
std::memcpy(linebuf, context.linebuf, MAX_LINE);
}
string location() const {
return file_context(pathname, linenum);
}
void warning(const string& what) const {
warning_func(location() + " " + what);
}
void warning(const boost::format& what) const {
warning_func(location() + " " + string(what.str()));
}
};
inline parse_context_t open_for_reading(const path& pathname,
const path& cwd)
{
path filename = resolve_path(pathname);
filename = filesystem::absolute(filename, cwd);
if (! exists(filename) || is_directory(filename))
throw_(std::runtime_error,
_f("Cannot read journal file %1%") % filename);
path parent(filename.parent_path());
#if HAVE_GPGME
shared_ptr<std::istream> stream(decrypted_stream_t::open_stream(filename));
#else
shared_ptr<std::istream> stream(new ifstream(filename));
#endif
parse_context_t context(stream, parent);
context.pathname = filename;
return context;
}
class parse_context_stack_t
{
std::list<parse_context_t> parsing_context;
public:
void push() {
parsing_context.push_front(parse_context_t(filesystem::current_path()));
}
void push(shared_ptr<std::istream> stream,
const path& cwd = filesystem::current_path()) {
parsing_context.push_front(parse_context_t(stream, cwd));
}
void push(const path& pathname,
const path& cwd = filesystem::current_path()) {
parsing_context.push_front(open_for_reading(pathname, cwd));
}
void push(const parse_context_t& context) {
parsing_context.push_front(context);
}
void pop() {
assert(! parsing_context.empty());
parsing_context.pop_front();
}
parse_context_t& get_current() {
assert(! parsing_context.empty());
return parsing_context.front();
}
};
} // namespace ledger
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