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* Parser for debian database files
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* Copyright (C) 2003 Enrico Zini <enrico@debian.org>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include "debdbparser.h"
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using namespace Tagcoll;
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using namespace aptFront;
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using namespace utils;
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// Eat spaces and empty lines
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// Returns the number of '\n' encountered
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int DebDBParser::eatSpacesAndEmptyLines() throw (ParserException)
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while ((c = in.nextChar()) != ParserInput::Eof && (isblank(c) || c == '\n'))
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if (c == ParserInput::Eof)
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// Get the ^([A-Za-z0-9]+) field name
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std::string DebDBParser::getFieldName() throw (ParserException)
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throw ParserException(in, "field must start at the beginning of the line");
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while ((c = in.nextChar()) != ParserInput::Eof && (isalnum(c) || c == '-'))
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if (c == ParserInput::Eof)
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throw ParserException(in, "field is truncated at end of file. Last line begins with: \"" + res + "\n");
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// Eat the \s*: characters that divide the field name and the field
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void DebDBParser::eatFieldSep() throw (ParserException)
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while ((c = in.nextChar()) != ParserInput::Eof && isblank(c))
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if (c == ParserInput::Eof)
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throw ParserException(in, "field is truncated at end of file");
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throw ParserException(in, string("invalid character `") + (char)c + "' expecting `:'");
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// Get the \s*(.+?)\s*\n of a body line
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void DebDBParser::appendFieldBody(string& body) throw (ParserException)
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// Skip leading spaces
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while ((c = in.nextChar()) != ParserInput::Eof && isblank(c))
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for ( ; c != ParserInput::Eof && c != '\n'; c = in.nextChar())
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// Delete trailing spaces
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unsigned int end = body.find_last_not_of(" \t");
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if (end != string::npos)
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body.resize(end + 1);
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if (c == ParserInput::Eof)
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DebDBParser::DebDBParser(ParserInput& input) throw (ParserException) :
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in(input), isBOL(true), isEOF(false)
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// Go at the start of the next record
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eatSpacesAndEmptyLines();
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// Read a record and positions itself at the start of the next one
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// Returns false when there are no more records available
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bool DebDBParser::nextRecord(Record& rec) throw (ParserException)
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// Read the field name
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string field = getFieldName();
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//fprintf(stderr, "Got field: %.*s\n", field.size(), field.data());
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// Read the first line of the field body
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appendFieldBody(body);
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//fprintf(stderr, "Got body: %.*s\n", body.size(), body.data());
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// Read the continuation lines of field body
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while ((n = eatSpacesAndEmptyLines()) == 0 && ! isBOL)
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size_t start_size = body.size();
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appendFieldBody(body);
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// Check for dot-only lines to be changed to empty lines
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if (body.size() - start_size == 1 && body[body.size() - 1] == '.')
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body.resize(body.size() - 1);
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//fprintf(stderr, "Appended body: %.*s\n", body.size(), body.data());
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//fprintf(stderr, "Trailing newlines: %d\n", n);
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rec.insert(pair<string,string>(field, body));
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} while (!isEOF && !n);
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void State::read(const char* file)
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while (p.nextRecord(rec))
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//fprintf(stderr, "Got record:\n");
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//for (record::const_iterator i = rec.begin(); i != rec.end(); i++)
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//fprintf(stderr, "\t%.*s: %.*s\n", i->first.size(), i->first.data(), i->second.size(), i->second.data());
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record::const_iterator i = rec.find("Name");
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throw ParserException(file, p.getLine(),
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"No Name: field found in record %d", rnum);
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if (find(i->second) != end())
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throw ParserException(file, p.getLine(),
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"Duplicate record %d for variable %.*s", rnum,
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(int)i->second.size(), i->second.data());
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const string& name = i->second;
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// Variable description
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i = rec.find("Description");
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throw ParserException(file, p.getLine(),
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"No Description: field found in record %d for %.*s",
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rnum, (int)name.size(), name.data());
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const string& desc = i->second;
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// Variable type (bool if omitted)
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Variable::Type type = Variable::vBOOL;
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i = rec.find("Type");
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if (i->second == "enum")
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type = Variable::vENUM;
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else if (i->second != "bool")
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throw ParserException(file, p.getLine(),
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"Invalid type %.*s for variable %.*s",
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(int)i->second.size(), i->second.data(),
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(int)name.size(), name.data());
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case Variable::vBOOL:
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// Default value (defaults to 'false')
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i = rec.find("Default");
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if (i->second == "true")
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else if (i->second == "false")
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throw ParserException(file, p.getLine(),
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"Invalid value `%.*s' for Default: field in"
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" record %d for variable %.*s",
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(int)i->second.size(), i->second.data(), rnum,
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(int)name.size(), name.data());
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var = new BoolVariable(name, desc, val);
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case Variable::vENUM:
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// Domain for the enum: comma-separated list of
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// [^ ,]+ or "<string with \<char> escapes"
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record::iterator i = rec.find("Domain");
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throw ParserException(file, p.getLine(),
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"No Domain: field found for enum `%.*s'"
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" in record %d", (int)name.size(), name.data(),
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string& domainstr = i->second;
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// Parse the domain enumeration
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parse_enum_domain(domainstr, domain, file, p.getLine());
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// Default value (mandatory for enums)
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i = rec.find("Default");
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throw ParserException(file, p.getLine(),
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"No Default: field found in record %d for enum `%.*s'",
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rnum, (int)name.size(), name.data());
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const string& val = i->second;
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var = new EnumVariable(name, desc, val, domain);
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insert(pair<string, Variable*>(name, var));
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// vim:set ts=4 sw=4:
added
removed
libapt-front/apt-front/utils/debdbparser.cpp
