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// parse_dpkg_status.cc
//
// Copyright (C) 2008 Daniel Burrows
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; see the file COPYING. If not, write to
// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
#include "parse_dpkg_status.h"
#include <aptitude.h>
#include <stdlib.h>
namespace aptitude
{
namespace apt
{
namespace
{
// Status constants.
const std::string status_pmerror("pmerror");
const std::string status_pmconffile("pmconffile");
// Parses [[:space:]]* and returns the next character.
const char *parse_whitespace(const char * &start,
const char * const end)
{
while(start < end && isspace(*start))
++start;
return start;
}
// Parses [^:]*:, stripping whitespace and returning the text.
std::string parse_colon_fragment(const char * &start,
const char * const end)
{
const char * const begin = parse_whitespace(start, end);
while(start < end && *start != ':')
++start;
const char *last = start;
if(start < end)
++start;
while(last != begin && isspace(last[-1]))
--last;
return std::string(begin, last);
}
// Parses '[^']', returning the enclosed text.
std::string parse_single_quoted_string(const char * start,
const char * const end)
{
parse_whitespace(start, end);
if(start == end || *start != '\'')
// Erk!
return _("<aptitude: internal parse error: no apostrophe>");
++start;
const char * const rval_begin = start;
while(start < end && *start != '\'')
++start;
if(start >= end)
return _("<aptitude: internal parse error: missing terminal apostrophe>");
const char * const rval_end = start;
++start;
return std::string(rval_begin, rval_end);
}
std::string strip_range(const char *begin, const char *end)
{
while(begin < end && isspace(*begin))
++begin;
while(end > begin && isspace(end[-1]))
--end;
return std::string(begin, end);
}
}
std::ostream &operator<<(std::ostream &out, const dpkg_status_message &msg)
{
switch(msg.get_type())
{
case dpkg_status_message::error:
out << "error(percent = "
<< msg.get_percent()
<< ", package = "
<< msg.get_package()
<< ", text = "
<< msg.get_text()
<< ")";
break;
case dpkg_status_message::conffile:
out << "conffile(existing_filename = "
<< msg.get_existing_filename()
<< ", new_filename = "
<< msg.get_new_filename()
<< ", percent = "
<< msg.get_percent()
<< ", text = "
<< msg.get_text()
<< ")";
break;
case dpkg_status_message::status:
out << "status(percent = "
<< msg.get_percent()
<< ", package = "
<< msg.get_package()
<< ", text = "
<< msg.get_text()
<< ")";
break;
}
return out;
}
dpkg_status_message dpkg_status_message::parse(const char *buf, size_t len)
{
const char * const end = buf + len;
const char *where = buf;
// First find out what type of message it is.
const std::string status(parse_colon_fragment(where, end));
if(status == status_pmerror)
{
// error: pkg: percent: message
const std::string pkg(parse_colon_fragment(where, end));
const std::string percent_str(parse_colon_fragment(where, end));
const std::string msg(strip_range(where, end));
const double percent = strtod(percent_str.c_str(), NULL);
return dpkg_status_message::make_error(percent, pkg, msg);
}
else if(status == status_pmconffile)
{
// pmconffile: conffile-display-name: percent: 'old-file' 'new-file'
const std::string conffile(parse_colon_fragment(where, end));
const std::string percent_str(parse_colon_fragment(where, end));
const std::string msg(strip_range(where, end));
const double percent = strtod(percent_str.c_str(), NULL);
const std::string old_filename(parse_single_quoted_string(where, end));
const std::string new_filename(parse_single_quoted_string(where, end));
return dpkg_status_message::make_conffile(old_filename,
new_filename,
percent,
conffile);
}
else
{
// (status): pkg: percent: message
const std::string package(parse_colon_fragment(where, end));
const std::string percent_str(parse_colon_fragment(where, end));
const std::string msg(strip_range(where, end));
const double percent = strtod(percent_str.c_str(), NULL);
return dpkg_status_message::make_status(percent, package, msg);
}
}
dpkg_status_parser::dpkg_status_parser()
: msg()
{
}
void dpkg_status_parser::process_input(const char *buf, size_t len)
{
const char *begin = buf;
const char * const end = buf + len;
const char *where = begin;
while(where < end)
{
while(where < end && *where != '\n')
++where;
msg.append(begin, where);
pending_messages.push_back(dpkg_status_message::parse(msg.c_str(), msg.size()));
msg.clear();
if(where < end)
++where;
begin = where;
}
}
}
}
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