/* ====================================================================
 * Copyright (c) 1998-1999 The Apache Group.  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.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * 4. The names "Apache Server" and "Apache Group" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Group and was originally based
 * on public domain software written at the National Center for
 * Supercomputing Applications, University of Illinois, Urbana-Champaign.
 * For more information on the Apache Group and the Apache HTTP server
 * project, please see <http://www.apache.org/>.
 *
 */


#ifdef CHARSET_EBCDIC
#include "ap_config.h"
#include "ebcdic.h"
/*
           Initial Port for Apache-1.3 by <Martin.Kraemer@Mch.SNI.De>

"BS2000 OSD/POSIX" is a POSIX subsystem on a main frame. It is made
by Fujitsu-Siemens Computers GmbH, Germany. The POSIX system has been
derived from a regular SVR4 source and thus is very "compatible"
to other unixes. In fact, it received the X/Open branding.

Within the POSIX subsystem, the same character set was chosen as in
"native BS2000", namely EBCDIC. This requires conversions at various
stages of the request and response processing.

EBCDIC Table. (In EBCDIC, the letters 'a'..'z' are not contiguous!)
This table is bijective, i.e. there are no ambigous or duplicate characters
*/

/* Bijective ebcdic-to-ascii table: */
const unsigned char os_toascii[256] = {
/*00*/  0x00, 0x01, 0x02, 0x03, 0x85, 0x09, 0x86, 0x7f,
        0x87, 0x8d, 0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /*................*/
/*10*/  0x10, 0x11, 0x12, 0x13, 0x8f, 0x0a, 0x08, 0x97,
        0x18, 0x19, 0x9c, 0x9d, 0x1c, 0x1d, 0x1e, 0x1f, /*................*/
/*20*/  0x80, 0x81, 0x82, 0x83, 0x84, 0x92, 0x17, 0x1b,
        0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, /*................*/
/*30*/  0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
        0x98, 0x99, 0x9a, 0x9b, 0x14, 0x15, 0x9e, 0x1a, /*................*/
/*40*/  0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1, 0xe3, 0xe5,
        0xe7, 0xf1, 0x60, 0x2e, 0x3c, 0x28, 0x2b, 0x7c, /* .........`.<(+|*/
/*50*/  0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef,
        0xec, 0xdf, 0x21, 0x24, 0x2a, 0x29, 0x3b, 0x9f, /*&.........!$*);.*/
/*60*/  0x2d, 0x2f, 0xc2, 0xc4, 0xc0, 0xc1, 0xc3, 0xc5,
        0xc7, 0xd1, 0x5e, 0x2c, 0x25, 0x5f, 0x3e, 0x3f, /*-/........^,%_>?*/
/*70*/  0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf,
        0xcc, 0xa8, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22, /*..........:#@'="*/
/*80*/  0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
        0x68, 0x69, 0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, /*.abcdefghi......*/
/*90*/  0xb0, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
        0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8, 0xc6, 0xa4, /*.jklmnopqr......*/
/*a0*/  0xb5, 0xaf, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
        0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0xdd, 0xde, 0xae, /*..stuvwxyz......*/
/*b0*/  0xa2, 0xa3, 0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc,
        0xbd, 0xbe, 0xac, 0x5b, 0x5c, 0x5d, 0xb4, 0xd7, /*...........[\]..*/
/*c0*/  0xf9, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
        0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5, /*.ABCDEFGHI......*/
/*d0*/  0xa6, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50,
        0x51, 0x52, 0xb9, 0xfb, 0xfc, 0xdb, 0xfa, 0xff, /*.JKLMNOPQR......*/
/*e0*/  0xd9, 0xf7, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
        0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2, 0xd3, 0xd5, /*..STUVWXYZ......*/
/*f0*/  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
        0x38, 0x39, 0xb3, 0x7b, 0xdc, 0x7d, 0xda, 0x7e  /*0123456789.{.}.~*/
};


/* Bijective ascii-to-ebcdic table: */
const unsigned char os_toebcdic[256] = {
/*00*/  0x00, 0x01, 0x02, 0x03, 0x37, 0x2d, 0x2e, 0x2f,
        0x16, 0x05, 0x15, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,  /*................*/
/*10*/  0x10, 0x11, 0x12, 0x13, 0x3c, 0x3d, 0x32, 0x26,
        0x18, 0x19, 0x3f, 0x27, 0x1c, 0x1d, 0x1e, 0x1f,  /*................*/
/*20*/  0x40, 0x5a, 0x7f, 0x7b, 0x5b, 0x6c, 0x50, 0x7d,
        0x4d, 0x5d, 0x5c, 0x4e, 0x6b, 0x60, 0x4b, 0x61,  /* !"#$%&'()*+,-./ */
/*30*/  0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
        0xf8, 0xf9, 0x7a, 0x5e, 0x4c, 0x7e, 0x6e, 0x6f,  /*0123456789:;<=>?*/
/*40*/  0x7c, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
        0xc8, 0xc9, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,  /*@ABCDEFGHIJKLMNO*/
/*50*/  0xd7, 0xd8, 0xd9, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6,
        0xe7, 0xe8, 0xe9, 0xbb, 0xbc, 0xbd, 0x6a, 0x6d,  /*PQRSTUVWXYZ[\]^_*/
/*60*/  0x4a, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
        0x88, 0x89, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96,  /*`abcdefghijklmno*/
/*70*/  0x97, 0x98, 0x99, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6,
        0xa7, 0xa8, 0xa9, 0xfb, 0x4f, 0xfd, 0xff, 0x07,  /*pqrstuvwxyz{|}~.*/
/*80*/  0x20, 0x21, 0x22, 0x23, 0x24, 0x04, 0x06, 0x08,
        0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x09, 0x0a, 0x14,  /*................*/
/*90*/  0x30, 0x31, 0x25, 0x33, 0x34, 0x35, 0x36, 0x17,
        0x38, 0x39, 0x3a, 0x3b, 0x1a, 0x1b, 0x3e, 0x5f,  /*................*/
/*a0*/  0x41, 0xaa, 0xb0, 0xb1, 0x9f, 0xb2, 0xd0, 0xb5,
        0x79, 0xb4, 0x9a, 0x8a, 0xba, 0xca, 0xaf, 0xa1,  /*................*/
/*b0*/  0x90, 0x8f, 0xea, 0xfa, 0xbe, 0xa0, 0xb6, 0xb3,
        0x9d, 0xda, 0x9b, 0x8b, 0xb7, 0xb8, 0xb9, 0xab,  /*................*/
/*c0*/  0x64, 0x65, 0x62, 0x66, 0x63, 0x67, 0x9e, 0x68,
        0x74, 0x71, 0x72, 0x73, 0x78, 0x75, 0x76, 0x77,  /*................*/
/*d0*/  0xac, 0x69, 0xed, 0xee, 0xeb, 0xef, 0xec, 0xbf,
        0x80, 0xe0, 0xfe, 0xdd, 0xfc, 0xad, 0xae, 0x59,  /*................*/
/*e0*/  0x44, 0x45, 0x42, 0x46, 0x43, 0x47, 0x9c, 0x48,
        0x54, 0x51, 0x52, 0x53, 0x58, 0x55, 0x56, 0x57,  /*................*/
/*f0*/  0x8c, 0x49, 0xcd, 0xce, 0xcb, 0xcf, 0xcc, 0xe1,
        0x70, 0xc0, 0xde, 0xdb, 0xdc, 0x8d, 0x8e, 0xdf   /*................*/
};

/* Translate a memory block from EBCDIC (host charset) to ASCII (net charset)
 * dest and srce may be identical, or separate memory blocks, but
 * should not overlap. These functions intentionally have an interface
 * compatible to memcpy(3).
 */

void *
ebcdic2ascii(void *dest, const void *srce, size_t count)
{
    unsigned char *udest = dest;
    const unsigned char *usrce = srce;

    while (count-- != 0) {
        *udest++ = os_toascii[*usrce++];
    }

    return dest;
}

void *
ascii2ebcdic(void *dest, const void *srce, size_t count)
{
    unsigned char *udest = dest;
    const unsigned char *usrce = srce;

    while (count-- != 0) {
        *udest++ = os_toebcdic[*usrce++];
    }

    return dest;
}
#endif /*CHARSET_EBCDIC*/
