/*
   Unix SMB/CIFS implementation.
   minimal iconv implementation
   Copyright (C) Andrew Tridgell 2001
   Copyright (C) Jelmer Vernooij 2002,2003
   Copyright (C) Panos Christeas 2006

   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 2 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, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

   From samba 3.0 beta and GNU libiconv-1.8
   It's bad but most of the time we can't use libc iconv service:
   - it doesn't round trip for most encoding
   - it doesn't know about Apple extension

*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdlib.h>
#include <arpa/inet.h>

#include <atalk/unicode.h>

#include "mac_greek.h"
#include "generic_mb.h"

static size_t   mac_greek_pull(void *, char **, size_t *, char **, size_t *);
static size_t   mac_greek_push(void *, char **, size_t *, char **, size_t *);

struct charset_functions charset_mac_greek = {
    "MAC_GREEK",
    6,
    mac_greek_pull,
    mac_greek_push,
    CHARSET_CLIENT | CHARSET_MULTIBYTE,
    NULL,
    NULL,
    NULL
};

/* ------------------------ */
static int
char_ucs2_to_mac_greek(unsigned char *r, ucs2_t wc)
{
    unsigned char c = 0;

    if (wc < 0x0080) {
        *r = wc;
        return 1;
    } else if (wc >= 0x00a0 && wc < 0x0100) {
        c = mac_greek_page00[wc - 0x00a0];
    } else if (wc == 0x0153) {
        c = 0xcf;
    } else if (wc >= 0x0380 && wc < 0x03d0) {
        c = mac_greek_page03[wc - 0x0380];
    } else if (wc >= 0x2010 && wc < 0x2038) {
        c = mac_greek_page20[wc - 0x2010];
    } else if (wc == 0x2122) {
        c = 0x93;
    } else if (wc >= 0x2248 && wc < 0x2268) {
        c = mac_greek_page22[wc - 0x2248];
    }

    if (c != 0) {
        *r = c;
        return 1;
    }

    return 0;
}

static size_t mac_greek_push(void *cd, char **inbuf, size_t *inbytesleft,
                             char **outbuf, size_t *outbytesleft)
{
    /* No special handling required */
    return (size_t) mb_generic_push(char_ucs2_to_mac_greek, cd, inbuf, inbytesleft,
                                    outbuf, outbytesleft);
}

/* ------------------------ */
static int
char_mac_greek_to_ucs2(ucs2_t *pwc, const unsigned char *s)
{
    unsigned char c = *s;

    if (c < 0x80) {
        *pwc = (ucs2_t) c;
        return 1;
    } else {
        unsigned short wc = mac_greek_2uni[c - 0x80];

        if (wc != 0xfffd) {
            *pwc = (ucs2_t) wc;
            return 1;
        }
    }

    return 0;
}

static size_t mac_greek_pull(void *cd, char **inbuf, size_t *inbytesleft,
                             char **outbuf, size_t *outbytesleft)
{
    return (size_t) mb_generic_pull(char_mac_greek_to_ucs2, cd, inbuf, inbytesleft,
                                    outbuf, outbytesleft);
}
