/*-

 * 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_mapper_646.h"

#ifdef HAVE_SYS_QUEUE_H

#include <sys/queue.h>

#else

#include "dcmtk/oficonv/queue.h"

#endif

#include <errno.h>

#include <limits.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "citrus_bcs.h"

#include "citrus_types.h"

#include "citrus_module.h"

#include "citrus_region.h"

#include "citrus_memstream.h"

#include "citrus_mmap.h"

#include "citrus_hash.h"

#include "citrus_mapper.h"

/* ---------------------------------------------------------------------- */

_CITRUS_MAPPER_DECLS(mapper_646);

_CITRUS_MAPPER_DEF_OPS(mapper_646);

/* ---------------------------------------------------------------------- */

#define ILSEQ   0xFFFFFFFE

#define INVALID 0xFFFFFFFF

#define SPECIALS(x)             \

    x(0x23)                 \

    x(0x24)                 \

    x(0x40)                 \

    x(0x5B)                 \

    x(0x5C)                 \

    x(0x5D)                 \

    x(0x5E)                 \

    x(0x60)                 \

    x(0x7B)                 \

    x(0x7C)                 \

    x(0x7D)                 \

    x(0x7E)

#define INDEX(x) INDEX_##x,

enum {

    SPECIALS(INDEX)

    NUM_OF_SPECIALS

};

struct _citrus_mapper_646 {

    _citrus_index_t     m6_map[NUM_OF_SPECIALS];

    int      m6_forward;

};

int

_citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops)

{

    memcpy(ops, &_citrus_mapper_646_mapper_ops,

        sizeof(_citrus_mapper_646_mapper_ops));

    return (0);

}

#define T_COMM '#'

static int

parse_file(struct _citrus_mapper_646 *m6, const char *path)

{

    struct _citrus_memory_stream ms;

    struct _citrus_region r;

    const char *p;

    char *pp;

    size_t len;

    char buf[OFICONV_PATH_MAX];

    int i, ret;

    ret = _citrus_map_file(&r, path);

    if (ret)

        return (ret);

    _citrus_memory_stream_bind(&ms, &r);

    for (i = 0; i < NUM_OF_SPECIALS; i++) {

retry:

        p = _citrus_memory_stream_getln(&ms, &len);

        if (p == NULL) {

            ret = EINVAL;

            break;

        }

        p = _citrus_bcs_skip_ws_len(p, &len);

        if (*p == T_COMM || len==0)

            goto retry;

        if (!_citrus_bcs_isdigit(*p)) {

            ret = EINVAL;

            break;

        }

        snprintf(buf, sizeof(buf), "%.*s", (int)len, p);

        pp = CITRUS_DECONST(void *, p);

        m6->m6_map[i] = strtoul(buf, (char **)&pp, 0);

        p = _citrus_bcs_skip_ws(buf);

        if (*p != T_COMM && !*p) {

            ret = EINVAL;

            break;

        }

    }

    _citrus_unmap_file(&r);

    return (ret);

};

static int

parse_var(struct _citrus_mapper_646 *m6, struct _citrus_memory_stream *ms,

    const char *dir)

{

    struct _citrus_region r;

    char path[OFICONV_PATH_MAX];

    memset(&r, 0, sizeof(struct _citrus_region ));

    m6->m6_forward = 1;

    _citrus_memory_stream_skip_ws(ms);

    /* whether backward */

    if (_citrus_memory_stream_peek(ms) == '!') {

        _citrus_memory_stream_getc(ms);

        m6->m6_forward = 0;

    }

    /* get description file path */

    _citrus_memory_stream_getregion(ms, &r, _citrus_memory_stream_remainder(ms));

    snprintf(path, sizeof(path), "%s/%.*s",

         dir, (int)_citrus_region_size(&r), (char *)_citrus_region_head(&r));

    /* remove trailing white spaces */

    path[_citrus_bcs_skip_nonws(path)-path] = '\0';

    return (parse_file(m6, path));

}

static int

/*ARGSUSED*/

_citrus_mapper_646_mapper_init(struct _citrus_mapper_area * ma ,

    struct _citrus_csmapper * cm, const char * dir,

    const void * var, size_t lenvar,

    struct _citrus_mapper_traits * mt, size_t lenmt)

{

    struct _citrus_mapper_646 *m6;

    struct _citrus_memory_stream ms;

    struct _citrus_region r;

    int ret;

    (void) ma;

    if (lenmt < sizeof(*mt))

        return (EINVAL);

    m6 = malloc(sizeof(*m6));

    if (m6 == NULL)

        return (errno);

    _citrus_region_init(&r, CITRUS_DECONST(void *, var), lenvar);

    _citrus_memory_stream_bind(&ms, &r);

    ret = parse_var(m6, &ms, dir);

    if (ret) {

        free(m6);

        return (ret);

    }

    cm->cm_closure = m6;

    mt->mt_src_max = mt->mt_dst_max = 1;    /* 1:1 converter */

    mt->mt_state_size = 0;          /* stateless */

    return (0);

}

static void

/*ARGSUSED*/

_citrus_mapper_646_mapper_uninit(struct _citrus_csmapper *cm)

{

    if (cm && cm->cm_closure)

        free(cm->cm_closure);

}

static int

/*ARGSUSED*/

_citrus_mapper_646_mapper_convert(struct _citrus_csmapper * cm,

    _citrus_index_t * dst, _citrus_index_t src, void * ps )

{

    struct _citrus_mapper_646 *m6;

    (void) ps;

    m6 = cm->cm_closure;

    if (m6->m6_forward) {

        /* forward */

        if (src >= 0x80)

            return (_CITRUS_MAPPER_CONVERT_ILSEQ);

#define FORWARD(x)                  \

if (src == (x)) {                   \

    if (m6->m6_map[INDEX_##x]==INVALID)     \

        return (_CITRUS_MAPPER_CONVERT_NONIDENTICAL);  \

    *dst = m6->m6_map[INDEX_##x];           \

    return (0);                 \

} else

        SPECIALS(FORWARD);

        *dst = src;

    } else {

        /* backward */

#define BACKWARD(x)                         \

if (m6->m6_map[INDEX_##x] != INVALID && src == m6->m6_map[INDEX_##x]) { \

    *dst = (x);                         \

    return (0);                         \

} else if (src == (x))                          \

    return (_CITRUS_MAPPER_CONVERT_ILSEQ);                 \

else

        SPECIALS(BACKWARD);

        if (src >= 0x80)

            return (_CITRUS_MAPPER_CONVERT_NONIDENTICAL);

        *dst = src;

    }

    return (_CITRUS_MAPPER_CONVERT_SUCCESS);

}

static void

/*ARGSUSED*/

_citrus_mapper_646_mapper_init_state(void)

{

}