/*-

 * Copyright (c) 2002 Citrus Project,

 * Copyright (c) 2010 Gabor Kovesdan <gabor@FreeBSD.org>,

 * 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_none.h"

#include "dcmtk/oficonv/iconv.h"

#include <sys/types.h>

#include <errno.h>

#include <stddef.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <wchar.h>

#include "citrus_bcs.h"

#include "citrus_types.h"

#include "citrus_module.h"

#include "citrus_stdenc.h"

_CITRUS_STDENC_DECLS(NONE);

_CITRUS_STDENC_DEF_OPS(NONE);

struct _citrus_stdenc_traits _citrus_NONE_stdenc_traits = {

    0,  /* et_state_size */

    1,  /* mb_cur_max */

};

static int

_citrus_NONE_stdenc_init(struct _citrus_stdenc * ce,

    const void *var , size_t lenvar ,

    struct _citrus_stdenc_traits * et)

{

    (void) var;

    (void) lenvar;

    et->et_state_size = 0;

    et->et_mb_cur_max = 1;

    ce->ce_closure = NULL;

    return (0);

}

static void

_citrus_NONE_stdenc_uninit(struct _citrus_stdenc *ce )

{

    (void) ce;

}

static int

_citrus_NONE_stdenc_init_state(struct _citrus_stdenc * ce ,

    void * ps )

{

    (void) ce;

    (void) ps;

    return (0);

}

static int

_citrus_NONE_stdenc_mbtocs(struct _citrus_stdenc * ce ,

    _citrus_csid_t *csid, _citrus_index_t *idx, char **s, size_t n,

    void *ps , size_t *nresult, struct iconv_hooks *hooks)

{

    (void) ce;

    (void) ps;

    if (n < 1) {

        *nresult = (size_t)-2;

        return (0);

    }

    *csid = 0;

    *idx = (_citrus_index_t)(unsigned char)*(*s)++;

    *nresult = *idx == 0 ? 0 : 1;

    if ((hooks != NULL) && (hooks->uc_hook != NULL))

        hooks->uc_hook((unsigned int)*idx, hooks->data);

    return (0);

}

static int

_citrus_NONE_stdenc_cstomb(struct _citrus_stdenc * ce ,

    char *s, size_t n, _citrus_csid_t csid, _citrus_index_t idx, void *ps ,

    size_t *nresult, struct iconv_hooks *hooks )

{

    (void) ce;

    (void) ps;

    (void) hooks;

    if (csid == _CITRUS_CSID_INVALID) {

        *nresult = 0;

        return (0);

    }

    if (csid != 0)

        return (EILSEQ);

    if ((idx & 0x000000FF) == idx) {

        if (n < 1) {

            *nresult = (size_t)-1;

            return (E2BIG);

        }

        *s = (char)idx;

        *nresult = 1;

    } else if ((idx & 0x0000FFFF) == idx) {

        if (n < 2) {

            *nresult = (size_t)-1;

            return (E2BIG);

        }

        s[0] = (char)idx;

        /* XXX: might be endian dependent */

        s[1] = (char)(idx >> 8);

        *nresult = 2;

    } else if ((idx & 0x00FFFFFF) == idx) {

        if (n < 3) {

            *nresult = (size_t)-1;

            return (E2BIG);

        }

        s[0] = (char)idx;

        /* XXX: might be endian dependent */

        s[1] = (char)(idx >> 8);

        s[2] = (char)(idx >> 16);

        *nresult = 3;

    } else {

        if (n < 4) {

            *nresult = (size_t)-1;

            return (E2BIG);

        }

        s[0] = (char)idx;

        /* XXX: might be endian dependent */

        s[1] = (char)(idx >> 8);

        s[2] = (char)(idx >> 16);

        s[3] = (char)(idx >> 24);

        *nresult = 4;

    }

    return (0);

}

static int

_citrus_NONE_stdenc_mbtowc(struct _citrus_stdenc * ce ,

    _citrus_wc_t * pwc, char ** s, size_t n,

    void * pspriv , size_t * nresult,

    struct iconv_hooks *hooks)

{

    (void) ce;

    (void) pspriv;

    if (*s == NULL) {

        *nresult = 0;

        return (0);

    }

    if (n == 0) {

        *nresult = (size_t)-2;

        return (0);

    }

    if (pwc != NULL)

        *pwc = (_citrus_wc_t)(unsigned char) **s;

    *nresult = **s == '\0' ? 0 : 1;

    if ((hooks != NULL) && (hooks->wc_hook != NULL))

        hooks->wc_hook(*pwc, hooks->data);

    return (0);

}

static int

_citrus_NONE_stdenc_wctomb(struct _citrus_stdenc * ce ,

    char * s, size_t n, _citrus_wc_t wc,

    void * pspriv , size_t * nresult,

    struct iconv_hooks *hooks )

{

    (void) ce;

    (void) pspriv;

    (void) hooks;

    if ((wc & ~0xFFU) != 0) {

        *nresult = (size_t)-1;

        return (EILSEQ);

    }

    if (n == 0) {

        *nresult = (size_t)-1;

        return (E2BIG);

    }

    *nresult = 1;

    if (s != NULL && n > 0)

        *s = (char)wc;

    return (0);

}

static int

_citrus_NONE_stdenc_put_state_reset(struct _citrus_stdenc * ce ,

    char * s , size_t n ,

    void * pspriv , size_t * nresult)

{

    (void) ce;

    (void) s;

    (void) n;

    (void) pspriv;

    *nresult = 0;

    return (0);

}

static int

_citrus_NONE_stdenc_get_state_desc(struct _citrus_stdenc * ce ,

    void * ps , int id,

    struct _citrus_stdenc_state_desc * d)

{

    int ret = 0;

    (void) ce;

    (void) ps;

    switch (id) {

    case _CITRUS_STDENC_SDID_GENERIC:

        d->u.generic.state = _CITRUS_STDENC_SDGEN_INITIAL;

        break;

    default:

        ret = EOPNOTSUPP;

    }

    return (ret);

}