config.c

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/**
 * \file
 *
 * \author  Georg Hopp
 *
 * \copyright
 * Copyright © 2012  Georg Hopp
 *
 * 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 3 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.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>

#include "class.h"
#include "config/config.h"
#include "config/value.h"
#include "utils/memory.h"

static
int
configCtor(void * _this, va_list * params)
{
    Config this = _this;

    FILE   * handle;
    char     line[MAX_CONFIG_LINE];
    char   * cnf_file  = va_arg(*params, char *);
    size_t   ncnf_file = strlen(cnf_file);

    this->cnf_file = memMalloc(ncnf_file + 1);
    memcpy(this->cnf_file, cnf_file, ncnf_file);
    this->cnf_file[ncnf_file] = '\0';

    handle = fopen(this->cnf_file, "r");
    if (NULL == handle) {
        MEM_FREE(this->cnf_file);
        return -1;
    }

    this->config = new(Hash);

    line[MAX_CONFIG_LINE] = '\0';

    while(NULL != fgets(line, MAX_CONFIG_LINE, handle)) {
        char   * key     = line;
        size_t   nkey    = 0;
        size_t   nvalue  = 0;
        size_t   nspaces = 0;
        char   * value;

        while (isspace(*key)) {
            key++;
        }

        if ('#' == *key || 0 == *key) {
            continue;
        }

        while (! isspace(key[nkey])) {
            nkey++;
        }

        value = &(key[nkey+1]);
        while (isspace(*value)) {
            value++;
        }

        while ('\0' != value[nvalue+nspaces]
                && '\n' != value[nvalue+nspaces])
        {
            if (isspace(value[nvalue+nspaces])) {
                nspaces++;
            } else {
                if (0 != nspaces) {
                    nvalue += nspaces;
                    nspaces = 0;
                }
                nvalue++;
            }
        }

        value[nvalue] = '\0';

        if (0 != nkey && 0 != nvalue) {
            hashAdd(
                    this->config,
                    new(ConfigValue, key, nkey, value, nvalue));
        }
    }

    fclose(handle);

    return 0;
}

static void configDtor(void * _this)
{
    Config this = _this;

    MEM_FREE(this->cnf_file);
    delete(this->config);
}

INIT_IFACE(Class, configCtor, configDtor, NULL);
CREATE_CLASS(Config, NULL, IFACE(Class));

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