/*-
 * Copyright (c)2003 Citrus Project,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 */

#include "dcmtk/config/osconfig.h"
#include "citrus_lookup_factory.h"

#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "citrus_bcs.h"
#include "citrus_region.h"
#include "citrus_db_factory.h"
#include "citrus_db_hash.h"
#include "citrus_lookup_file.h"

#define T_COMM '#'
static int
convert_line(struct _citrus_db_factory *df, const char *line, size_t len)
{
    const char *p;
    char data[LINE_MAX], key[LINE_MAX];

    /* cut off trailing comment */
    p = memchr(line, T_COMM, len);
    if (p)
        len = p - line;

    /* key */
    line = _citrus_bcs_skip_ws_len(line, &len);
    if (len == 0)
        return (0);
    p = _citrus_bcs_skip_nonws_len(line, &len);
    if (p == line)
        return (0);
    snprintf(key, sizeof(key), "%.*s", (int)(p-line), line);
    _citrus_bcs_convert_to_lower(key);

    /* data */
    line = _citrus_bcs_skip_ws_len(p, &len);
    _citrus_bcs_trunc_rws_len(line, &len);
    snprintf(data, sizeof(data), "%.*s", (int)len, line);

    return (_citrus_db_factory_add_string_by_string(df, key, data));
}

static int
dump_db(struct _citrus_db_factory *df, struct _citrus_region *r)
{
    void *ptr;
    size_t size;

    size = _citrus_db_factory_calc_size(df);
    ptr = malloc(size);
    if (ptr == NULL)
        return (errno);
    _citrus_region_init(r, ptr, size);

    return (_citrus_db_factory_serialize(df, _CITRUS_LOOKUP_MAGIC, r));
}

int
_citrus_lookup_factory_convert(FILE *out, FILE *in)
{
    struct _citrus_db_factory *df;
    struct _citrus_region r;
    char *line;
    int ret;
#ifdef HAVE_FGETLN
    size_t size;
#else
    char buf[1024];
#endif

    ret = _citrus_db_factory_create(&df, &_citrus_db_hash_std, NULL);
    if (ret)
        return (ret);

#ifdef HAVE_FGETLN
    while ((line = fgetln(in, &size)) != NULL)
        if ((ret = convert_line(df, line, size))) {
            _citrus_db_factory_free(df);
            return (ret);
        }
#else
    while ((line = fgets(buf, 1024, in)) != NULL)
    {
        ret = convert_line(df, line, strlen(line));
        if (ret) {
            _citrus_db_factory_free(df);
            return (ret);
        }
    }
#endif

    ret = dump_db(df, &r);
    _citrus_db_factory_free(df);
    if (ret)
        return (ret);

    if (fwrite(_citrus_region_head(&r), _citrus_region_size(&r), 1, out) != 1)
        return (errno);

    return (0);
}