swconfig.cpp

Go to the documentation of this file.

/******************************************************************************
 *
 *  swconfig.cpp -  used for saving and retrieval of configuration
 *          information
 *
 * $Id: swconfig.cpp 3748 2020-07-02 17:20:40Z scribe $
 *
 * Copyright 1998-2013 CrossWire Bible Society (http://www.crosswire.org)
 *  CrossWire Bible Society
 *  P. O. Box 2528
 *  Tempe, AZ  85280-2528
 *
 * 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 version 2.
 *
 * 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.
 *
 */

#include <swconfig.h>
#include <utilstr.h>
#include <filemgr.h>
#include <fcntl.h>


SWORD_NAMESPACE_START

#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif

SWConfig::SWConfig() {
}


SWConfig::SWConfig(const char *ifilename) {
    filename = ifilename;
    load();
}


SWConfig::~SWConfig() {
}


#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif

void SWConfig::load() {

    if (!getFileName().size()) return;  // assert we have a filename

    FileDesc *cfile;
    char *buf, *data;
    SWBuf line;
    ConfigEntMap cursect;
    SWBuf sectname;
    bool first = true;
    
    getSections().erase(getSections().begin(), getSections().end());
    
    cfile = FileMgr::getSystemFileMgr()->open(getFileName().c_str(), FileMgr::RDONLY);
    if (cfile->getFd() > 0) {
        bool goodLine = FileMgr::getLine(cfile, line);

        // clean UTF encoding tags at start of file
        while (goodLine && line.length() && 
                ((((unsigned char)line[0]) == 0xEF) ||
                 (((unsigned char)line[0]) == 0xBB) ||
                 (((unsigned char)line[0]) == 0xBF))) {
            line << 1;
        }
        
        while (goodLine) {
            // ignore commented lines
            if (!line.startsWith("#")) {
                buf = new char [ line.length() + 1 ];
                strcpy(buf, line.c_str());
                if (*strstrip(buf) == '[') {
                    if (!first)
                        getSections().insert(SectionMap::value_type(sectname, cursect));
                    else first = false;
                    
                    cursect.erase(cursect.begin(), cursect.end());

                    strtok(buf, "]");
                    sectname = buf+1;
                }
                else {
                    strtok(buf, "=");
                    if ((*buf) && (*buf != '=')) {
                        if ((data = strtok(NULL, "")))
                            cursect.insert(ConfigEntMap::value_type(buf, strstrip(data)));
                        else cursect.insert(ConfigEntMap::value_type(buf, ""));
                    }
                }
                delete [] buf;
            }
            goodLine = FileMgr::getLine(cfile, line);
        }
        if (!first)
            getSections().insert(SectionMap::value_type(sectname, cursect));

        FileMgr::getSystemFileMgr()->close(cfile);
    }
}


void SWConfig::save() const {

    if (!getFileName().size()) return;  // assert we have a filename

    FileDesc *cfile;
    SWBuf buf;
    SectionMap::const_iterator sit;
    ConfigEntMap::const_iterator entry;
    SWBuf sectname;
    
    cfile = FileMgr::getSystemFileMgr()->open(getFileName().c_str(), FileMgr::RDWR|FileMgr::CREAT|FileMgr::TRUNC);
    if (cfile->getFd() > 0) {
        
        for (sit = getSections().begin(); sit != getSections().end(); ++sit) {
            buf =  "\n[";
            buf += (*sit).first.c_str();
            buf += "]\n";
            cfile->write(buf.c_str(), buf.length());
            for (entry = (*sit).second.begin(); entry != (*sit).second.end(); ++entry) {
                buf = (*entry).first.c_str();
                buf += "=";
                buf += (*entry).second.c_str();
                buf += "\n";
                cfile->write(buf.c_str(), buf.length());
            }
        }
        buf = "\n";
        cfile->write(buf.c_str(), buf.length());
        FileMgr::getSystemFileMgr()->close(cfile);
    }
}


void SWConfig::augment(const SWConfig &addFrom) {

    SectionMap::const_iterator section;
    ConfigEntMap::const_iterator entry, start, end;

    for (section = addFrom.getSections().begin(); section != addFrom.getSections().end(); ++section) {
        for (entry = (*section).second.begin(); entry != (*section).second.end(); ++entry) {
            start = getSections()[section->first].lower_bound(entry->first);
            end   = getSections()[section->first].upper_bound(entry->first);
            // do we have multiple instances of the same key?
            if (start != end) {
                // TODO: what is this?
                ConfigEntMap::const_iterator x = addFrom.getSections().find(section->first)->second.lower_bound(entry->first);
                ConfigEntMap::const_iterator y = addFrom.getSections().find(section->first)->second.upper_bound(entry->first);
                ++x;
                if (((++start) != end) || (x != y)) {
                    for (--start; start != end; ++start) {
                        if (!strcmp(start->second.c_str(), entry->second.c_str()))
                            break;
                    }
                    if (start == end)
                        getSections()[(*section).first].insert(ConfigEntMap::value_type((*entry).first, (*entry).second));
                }
                else    getSections()[section->first][entry->first.c_str()] = entry->second.c_str();
            }       
            else    getSections()[section->first][entry->first.c_str()] = entry->second.c_str();
        }
    }
}


#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif

// TODO: use deprecated public 'Sections' property for now until we remove deprecation
// and store in private property
SectionMap &SWConfig::getSections() { return Sections; }

// TODO: use deprecated public 'filename' property for now until we remove deprecation
// and store in private property
    
SWBuf SWConfig::getFileName() const { return filename; }

#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif

SWORD_NAMESPACE_END